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Artículos de revistas sobre el tema "Radar Antennas Testing"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 30 de enero de 2023

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1

Wang, Bin, Shunan Wang, Dan Zeng, and Min Wang. "Convolutional Neural Network-Based Radar Antenna Scanning Period Recognition." Electronics 11, no. 9 (April 26, 2022): 1383. http://dx.doi.org/10.3390/electronics11091383.

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The antenna scanning period (ASP) of radar is a crucial parameter in electronic warfare (EW) which is used in many applications, such as radar work pattern recognition and emitter recognition. For antennas of radars and EW systems, which perform scanning circularly, the method based on threshold measurement is invalid. To overcome this shortcoming, this study proposes a method using the convolutional neural network (CNN) to recognize the ASP of radar under the condition that antennas of the radar and EW system both scan circularly. A system model is constructed, and factors affecting the recei

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2

Wang, Bin, Shunan Wang, Dan Zeng, and Min Wang. "Convolutional Neural Network-Based Radar Antenna Scanning Period Recognition." Electronics 11, no. 9 (April 26, 2022): 1383. http://dx.doi.org/10.3390/electronics11091383.

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The antenna scanning period (ASP) of radar is a crucial parameter in electronic warfare (EW) which is used in many applications, such as radar work pattern recognition and emitter recognition. For antennas of radars and EW systems, which perform scanning circularly, the method based on threshold measurement is invalid. To overcome this shortcoming, this study proposes a method using the convolutional neural network (CNN) to recognize the ASP of radar under the condition that antennas of the radar and EW system both scan circularly. A system model is constructed, and factors affecting the recei

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3

Wang, Bin, Shunan Wang, Dan Zeng, and Min Wang. "Convolutional Neural Network-Based Radar Antenna Scanning Period Recognition." Electronics 11, no. 9 (April 26, 2022): 1383. http://dx.doi.org/10.3390/electronics11091383.

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The antenna scanning period (ASP) of radar is a crucial parameter in electronic warfare (EW) which is used in many applications, such as radar work pattern recognition and emitter recognition. For antennas of radars and EW systems, which perform scanning circularly, the method based on threshold measurement is invalid. To overcome this shortcoming, this study proposes a method using the convolutional neural network (CNN) to recognize the ASP of radar under the condition that antennas of the radar and EW system both scan circularly. A system model is constructed, and factors affecting the recei

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4

MARUDDANI, BASO, EFRI SANDI EFRI SANDI, and MUHAMMAD FADHIL NAUFAL SALAM. "Perancangan dan Optimasi Antena Vivaldi pada Sistem Radar Penembus Permukaan (Ground Penetrating Radar)." ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika 7, no. 1 (January 24, 2019): 151. http://dx.doi.org/10.26760/elkomika.v7i1.151.

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ABSTRAKAntena Vivaldi merupakan salah satu jenis antena yang diimplementasikan pada radar penembus permukaan (Ground Penetrating Radar, GPR). GPR adalah salah satu metode non-destructive testing yang biasa digunakan untuk mengetahui kondisi beton/jalan raya. Penelitian ini merancang sebuah antena Vivaldi untuk digunakan pada GPR dengan frekuensi kerja 1 GHz – 2 GHz. Metode yang digunakan untuk merancang dan mengoptimasi antena Vivaldi adalah dengan mengubah beberapa parameter untuk mencapai spesifikasi yang diinginkan. Parameter tersebut antara lain lebar antena, panjang antena dan tapered slo

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5

Chipengo, Ushemadzoro, Peter M. Krenz, and Shawn Carpenter. "From Antenna Design to High Fidelity, Full Physics Automotive Radar Sensor Corner Case Simulation." Modelling and Simulation in Engineering 2018 (December 27, 2018): 1–19. http://dx.doi.org/10.1155/2018/4239725.

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Advanced driver assistance systems (ADAS) have recently been thrust into the spotlight in the automotive industry as carmakers and technology companies pursue effective active safety systems and fully autonomous vehicles. Various sensors such as lidar (light detection and ranging), radar (radio detection and ranging), ultrasonic, and optical cameras are employed to provide situational awareness to vehicles in a highly dynamic environment. Radar has emerged as a primary sensor technology for both active/passive safety and comfort-advanced driver-assistance systems. Physically building and testi

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6

Bernatek-Jakiel, Anita, and Marta Kondracka. "Detection of Soil Pipes Using Ground Penetrating Radar." Remote Sensing 11, no. 16 (August 9, 2019): 1864. http://dx.doi.org/10.3390/rs11161864.

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Soil piping leads to land degradation in almost all morphoclimatic regions. However, the detection of soil pipes is still a methodological challenge. Therefore, this study aims at testing ground penetrating radar (GPR) to identify soil pipes and to present the complexity of soil pipe networks. The GPR surveys were conducted at three sites in the Bieszczady Mountains (SE Poland), where pipes develop in Cambisols. In total, 36 GPR profiles longitudinal and transverse to piping systems were made and used to provide spatial visualization of pipe networks. Soil pipes were identified as reflection h

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7

Langston, Glen. "NRAO 43-m telescope operation at 170-1700 MHz: a Bi-Static Radar Collaboration." Proceedings of the International Astronomical Union 2, no. 14 (August 2006): 367. http://dx.doi.org/10.1017/s1743921307011015.

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AbstractThe NRAO 43m telescope has been refurbished and begun regular observations in the frequency range 170 - 1700 MHz. The 43 m operations support a Bi-Static Radar Collaboration to measure the Earth's ionospheric turbulence. Researchers from Chalmers University of Technology in Sweden have designed and built a unique design wide-band feed, 150 - 1700 MHz. Lincoln Laboratories/MIT has packaged the feed with room temperature low noise amplifiers. Lincoln Laboratories has installed a high-dynamic range RF system together with a wide-band sampler system. The NRAO operates the 43 m telescope ac

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8

Galajda, Pavol, Alena Galajdova, Stanislav Slovak, Martin Pecovsky, Milos Drutarovsky, Marek Sukop, and Ihab BA Samaneh. "Robot vision ultra-wideband wireless sensor in non-cooperative industrial environments." International Journal of Advanced Robotic Systems 15, no. 4 (July 1, 2018): 172988141879576. http://dx.doi.org/10.1177/1729881418795767.

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In this article, the ultra-wideband technology for localization and tracking of the robot gripper (behind the obstacles) in industrial environments is presented. We explore the possibilities of ultra-wideband radar sensor network employing the centralized data fusion method that can significantly improve tracking capabilities in a complex environment. In this article, we present ultra-wideband radar sensor network hardware demonstrator that uses a new wireless ultra-wideband sensor with an embedded controller to detect and track online or off-line movement of the robot gripper. This sensor use

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9

Pryshchenko, Oleksandr A., Vadym Plakhtii, Oleksandr M. Dumin, Gennadiy P. Pochanin, Vadym P. Ruban, Lorenzo Capineri, and Fronefield Crawford. "Implementation of an Artificial Intelligence Approach to GPR Systems for Landmine Detection." Remote Sensing 14, no. 17 (September 5, 2022): 4421. http://dx.doi.org/10.3390/rs14174421.

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Artificial Neural Network (ANN) approaches are applied to detect and determine the object class using a special set of the UltraWideBand (UWB) pulse Ground Penetrating Radar (GPR) sounding results. It used the results of GPR sounding with the antenna system, consisting of one radiator and four receiving antennas located around the transmitting antenna. The presence of four receiving antennas and, accordingly, the signals received from four spatially separated positions of the antennas provide a collection of signals received after reflection from an object at different angles and, due to this,

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10

Ajith, K. K., and Amitabha Bhattacharya. "Improving the GPR Detectability Using a Novel Loop Bowtie Antenna." Journal of Telecommunications and Information Technology, no. 3 (2017): 9–16. http://dx.doi.org/10.26636/jtit.2017.120917.

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The Ground Penetrating Radar (GPR) technique finds immense applications in civil engineering today, as the most suitable approach for non-destructive testing of pavements, highways, concrete structures, and more. The major challenge in carrying out a GPR evaluation is that the properties of the probed medium are usually unknown. The permittivity and conductivity of the medium may vary from those of air to water. The electromagnetic waves also have a frequency dependent attenuation. The ability of GPR to detect signals reflected and scattered by the targets largely depends upon the antenna perf

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11

Ionescu, Liviu, Alexandru Rusu-Casandra, Calin Bira, Alexandru Tatomirescu, Ionut Tramandan, Roberto Scagnoli, Dan Istriteanu, and Andrei-Edward Popa. "Development of the Romanian Radar Sensor for Space Surveillance and Tracking Activities." Sensors 22, no. 9 (May 6, 2022): 3546. http://dx.doi.org/10.3390/s22093546.

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The constant increase in the number of space objects and debris orbiting the Earth poses risks to satellites and other spacecraft, both in orbit and during the launching process. Therefore, the monitoring of space hazards to assess risk and prevent collisions has become part of the European Space Policy and requires the establishment of a dedicated Framework for Space Surveillance and Tracking (EU SST) Support. This article presents the CHEIA SST Radar, a new space tracking radar sensor developed and installed in Romania with the purpose of being included in the EU SST sensor network and of co

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12

Wassie, Y., M. Crosetto, G. Luzi, O. Monserrat, A. Barra, R. Palamá, M. Cuevas-González, S. M. Mirmazloumi, P. Espín-López, and B. Crippa. "ACTIVE REFLECTORS FOR INTERFEROMETRIC SAR DEFORMATION MEASUREMENT." International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLIII-B3-2021 (June 28, 2021): 177–82. http://dx.doi.org/10.5194/isprs-archives-xliii-b3-2021-177-2021.

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Abstract. This paper is focused on the design, implementation and testing of an active reflector, to be used to support deformation monitoring studies based on Synthetic Aperture Radar interferometry. The device is designed to work in C-band with Sentinel-1 data, operating at 5.405 GHz ± 50 MHz. A brief description of the active reflector is provided. It consists of two antennas and an amplifying section. The active reflector has been tested in different experiments. In this paper, we describe the experiment carried out in the Parc Mediterrani de la Tecnologia (Castelldefels, Barcelona). The r

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13

Choudhary, Vipin, and Daniel Rönnow. "A Nondestructive Testing Method for the Determination of the Complex Refractive Index Using Ultra Wideband Radar in Industrial Applications." Sensors 20, no. 11 (June 2, 2020): 3161. http://dx.doi.org/10.3390/s20113161.

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An ultra-wide band radar reflection measurement technique for industrial applications is introduced. A new method for determining the complex refractive index (or equivalently the relative permittivity) of objects with planar interfaces is presented. The object thickness can also be obtained experimentally. The method is a combination of time and frequency domain techniques. The objects can be finite in size and at a finite distance. The limits in size and distance for the method to be valid are experimentally investigated. The method is relatively insensitive to hardware impairments such as f

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14

Holt, J. M., P. J. Erickson, A. M. Gorczyca, and T. Grydeland. "MIDAS-W: a workstation-based incoherent scatter radar data acquisition system." Annales Geophysicae 18, no. 9 (September 30, 2000): 1231–41. http://dx.doi.org/10.1007/s00585-000-1231-3.

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Abstract. The Millstone Hill Incoherent Scatter Data Acquisition System (MIDAS) is based on an abstract model of an incoherent scatter radar. This model is implemented in a hierarchical software system, which serves to isolate hardware and low-level software implementation details from higher levels of the system. Inherent in this is the idea that implementation details can easily be changed in response to technological advances. MIDAS is an evolutionary system, and the MIDAS hardware has, in fact, evolved while the basic software model has remained unchanged. From the earliest days of MIDAS,

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15

Kyzioł, Lesław, Katarzyna Panasiuk, Grzegorz Hajdukiewicz, and Krzysztof Dudzik. "Acoustic Emission and K-S Metric Entropy as Methods for Determining Mechanical Properties of Composite Materials." Sensors 21, no. 1 (December 28, 2020): 145. http://dx.doi.org/10.3390/s21010145.

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Due to the unique properties of polymer composites, these materials are used in many industries, including shipbuilding (hulls of boats, yachts, motorboats, cutters, ship and cooling doors, pontoons and floats, torpedo tubes and missiles, protective shields, antenna masts, radar shields, and antennas, etc.). Modern measurement methods and tools allow to determine the properties of the composite material, already during its design. The article presents the use of the method of acoustic emission and Kolmogorov-Sinai (K-S) metric entropy to determine the mechanical properties of composites. The t

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16

Guliyev, Etibar, Rashad Allahverdiyev, and Qezale Kheyrabadi. "Identification of the patterns of influence the number of reinforcing elements and the inhomogeneity parameter of the shell material on frequencies of a reinforced inhomogeneous orthotropic spherical shell with a medium." Eastern-European Journal of Enterprise Technologies 5, no. 7 (119) (October 31, 2022): 35–43. http://dx.doi.org/10.15587/1729-4061.2022.266166.

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Spherical shells are used in many areas of the national economy. Spherical domes are widely used in the construction of various structures (technoparks, testing laboratories, entertainment complexes, reservoirs, etc.). They are also used in aircraft, ship structures, radar antennas and other structures. It is known that coatings have sufficient strength and durability even with a small thickness. However, to increase the working life of coatings, to ensure their long-term operation, as well as to increase their hardness, it is necessary to strengthen them on the surface or inside with rods. So

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17

Konopel'kin, M. Yu, S. V. Petrov, and D. A. Smirnyagina. "Implementation of stochastic signal processing algorithms in radar CAD." Russian Technological Journal 10, no. 5 (October 21, 2022): 49–59. http://dx.doi.org/10.32362/2500-316x-2022-10-5-49-59.

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Objectives. In 2020, development work on the creation of a Russian computer-assisted design system for radars (radar CAD) was completed. Radar CAD provides extensive opportunities for creating simulation models for developing the hardware-software complex of radar algorithms, which take into account the specific conditions of aerospace environment observation. The purpose of the present work is to review and demonstrate the capabilities of radar CAD in terms of implementing and testing algorithms for processing stochastic signals.Methods. The work is based on the mathematical apparatus of line

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18

Zhou, Daochuan, and Haitang Zhu. "Application of Ground Penetrating Radar in Detecting Deeply Embedded Reinforcing Bars in Pile Foundation." Advances in Civil Engineering 2021 (April 17, 2021): 1–13. http://dx.doi.org/10.1155/2021/4813415.

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Ground penetrating radar (GPR) has been widely used for nondestructive testings in civil engineering. However, the GPR has not been adequately applied in detecting deeply embedded reinforcing bars, which is usually difficult to be revealed in radar image due to the wave interference and attenuation in large depth penetration. This study presents a new approach for the GPR detection of deeply embedded reinforcing bars in the reinforced concrete pile foundation. The aim of the GPR survey is to determine the existence and the depth of internal reinforcing bars in the pile foundation for solving e

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19

Volosyuk, Valeriy, and Semen Zhyla. "Statistical Theory of Optimal Stochastic Signals Processing in Multichannel Aerospace Imaging Radar Systems." Computation 10, no. 12 (December 18, 2022): 224. http://dx.doi.org/10.3390/computation10120224.

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The work is devoted to solving current scientific and applied problems of the development of radar imaging methods. These developments are based on statistical theory of optimal signal processing. These developments allow researchers to create coherent high-resolution information-enriched images as well as incoherent images. These methods can be practically applied in multichannel aerospace radars through the proposed programs and algorithms. Firstly, the following models of stochastic signals at the output of multichannel registration regions of scattered electro-magnetic fields, internal noi

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20

Mahdi, Sultan, and Syahfrizal Tahcfulloh. "DOA Signal Identification Based on Amplitude and Phase Estimation for Subarray MIMO Radar Applications." Jurnal Elektronika dan Telekomunikasi 22, no. 2 (December 31, 2022): 48. http://dx.doi.org/10.55981/jet.498.

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The overlapped equal subarray transmit radar, which is also known as the Subarray Multiple-Input Multiple-Output radar, utilizes the key advantages simultaneously of both types of multi-antenna radar, i.e. the phased array and MIMO radars, so that it is able to detect multiple targets even though it has a radar cross section (RCS) of a weak or small target. In this paper, it is proposed to develop a parameter estimation approach called amplitude and phase estimation (APES). This approach provides improved resolution to the estimation of the amplitude and direction of arrival (DoA) of the targe

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21

Françoso, Maria Teresa, Carolina Oyama Mota, Tadeu Rosanti Sugahara Medeiros Lima, and Creso De Franco Peixoto. "Nondestructive Testing in Asphalt Pavements Using Ground Penetrating Radar (GPR)." Applied Mechanics and Materials 303-306 (February 2013): 525–28. http://dx.doi.org/10.4028/www.scientific.net/amm.303-306.525.

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This paper presents the results of using the system GPR (Ground Penetrating Radar), as an alternative that uses radio waves at frequencies from 10 to 2500 MHz to get data that enable non-destructive conduct inspections of underground or concrete structures in real time. The research aims to investigate asphalt pavements, analyzing the variations in the responses, which can reveal the presence of pathologies or defects. A case study was made acquiring data, at the State University of Campinas - UNICAMP, in Campinas – SP – Brazil, with antennae 270 and 1600 MHz, in pavements with visible defects

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22

Mbotshwa, Cosygyn, Felix Mazunga, and Joseph Singadi. "Design, Fabrication and Testing of an Ultra-Wide Band Bowtie Antenna for Wireless Radar (UHF, L and S Band) Communication." International Journal of Advanced Networking and Applications 14, no. 01 (2022): 5261–65. http://dx.doi.org/10.35444/ijana.2022.14104.

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A low-cost and light-weight ultra-wideband bowtie antenna for radar applications was simulated, fabricated and tested. A concise and easy to follow step-by-step description of the performed bowtie antenna simulation in Ansys HFSS software is presented. Optimized antenna parameters were utilized to fabricate the antenna. Fabrication was achieved by utilizing an FR4 PCB. The prototype was tested using a spectrum analyzer. The fabricated bowtie antenna results were used to validate the simulation results. The results obtained from the simulation platform were in close agreement to those of the pr

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23

Yu, Bi Qiong. "Azimuths Scan Servo System Design of the Radar." Applied Mechanics and Materials 321-324 (June 2013): 680–83. http://dx.doi.org/10.4028/www.scientific.net/amm.321-324.680.

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For the special requirements of the radar antenna, a servo system was designed to drive a certain type of weather radar azimuth scan. The control segment consists of the PC and the stepper motor motion control card, in which the stepper motor was used as the actuator and the motor drive circuit was built by the specific integrated driver chips of the stepper motor. By testing the vibration, the shock and the temperature of system, it shows that the designed azimuths scan servo system can meet the requirements of the weather radar azimuth scan.

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24

Ukhanov, E. V. Ukhanov. "SOLVING THE PROBLEM OF OPTIMAL RADAR RECOGNITION OF MOBILE AERIAL OBJECTS BASED ON THE THEORY OF STATISTICAL HYPOTHESIS TESTING." T-Comm 16, no. 11 (2022): 30–34. http://dx.doi.org/10.36724/2072-8735-2022-16-11-30-34.

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The materials of this article are devoted to the development of one of the main aspects of artificial intelligence systems - pattern recognition. The relevance of the materials is due to the rapid development of radar systems for various purposes and the transition in some directions from radar to radio vision. Currently, much attention is paid to the development of radar systems with synthesizing the antenna aperture, for remote sensing of the earth and recognition of stationary ground objects, however, according to the author, radar recognition of mobile aerial objects is an important issue.

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25

Spagnolo, Matteo, Edward C. King, David W. Ashmore, Brice R. Rea, Jeremy C. Ely, and Chris D. Clark. "Looking through drumlins: testing the application of ground-penetrating rada." Journal of Glaciology 60, no. 224 (2014): 1126–34. http://dx.doi.org/10.3189/2014jog14j110.

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AbstractGround-penetrating radar (GPR) is becoming a commonly applied technique in geomorphology. However, its use in the study of subglacial bedforms has yet to be fully explored and exploited. This paper presents the results of a GPR feasibility study conducted on a drumlinized terrain in Cumbria, UK, where five drumlins were investigated using multiple radar antenna frequencies. The site was selected for the presence of nearby bedrock outcrops, suggesting a shallow drumlinized diamict–bedrock contact and a permeable lithology. Despite the clayey sediment and unfavourable weather conditions,

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26

Ehrnsperger, Matthias G., Uwe Siart, Michael Moosbühler, Emil Daporta, and Thomas F. Eibert. "Signal degradation through sediments on safety-critical radar sensors." Advances in Radio Science 17 (September 19, 2019): 91–100. http://dx.doi.org/10.5194/ars-17-91-2019.

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Abstract. This paper focusses on a transmission line (TL) based model which allows to investigate the impact of multilayered obstructions in the propagating path of a radar signal at different distances and in combination with disturbances. Those disturbances can be water, snow, ice, and foliage at different densities, temperatures, positions, with a given thickness and layer combination. For the evaluation of the detectability of objects, the impulse response of the system can be obtained. Investigations employing state-of-the-art radar hardware confirm the consistency of theoretical and expe

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27

Lakshmaiah, Akumalla, N. N. S. S. R. K. Prasad, and K. P. Ray. "Investigations on Monolithic Radome Interactions with Active Electronically Scanned Array on Fighter Platform." Defence Science Journal 71, no. 5 (September 2, 2021): 662–69. http://dx.doi.org/10.14429/dsj.71.16398.

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The conventional fighter aircrafts are often equipped with fire control radar (FCR) using mechanically scanned antenna (MSA) with passive slots enclosed with monolithic conical radome. When the fighter platforms get upgraded with the modern active electronically steered array (AESA) FCR for better mission capabilities, even though radome change is desirable for optimum performance of AESA, it may not be feasible due to development time. This necessitate the evaluation of AESA radar with the existing monolithic radome. Hence active antenna aperture radiation pattern is required to be assessed w

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Norrdine, Abdelmoumen, Harun Cetinkaya, and Reinhold Herschel. "Radar Wave Based Positioning of Spatially Distributed MIMO Radar Antenna Systems for Near-Field Nondestructive Testing." IEEE Sensors Letters 4, no. 5 (May 2020): 1–4. http://dx.doi.org/10.1109/lsens.2020.2989546.

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Wu, Yuxuan, Feng Shen, Yue Yuan, and Dingjie Xu. "An Improved Modified Universal Ultra-Wideband Antenna Designed for Step Frequency Continuous Wave Ground Penetrating Radar System." Sensors 19, no. 5 (March 1, 2019): 1045. http://dx.doi.org/10.3390/s19051045.

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Step Frequency Continuous Wave Ground Penetrating Radar (SFCW-GPR), as a tool for nondestructive testing of shallow soil surface targets, the realization of the function of SFCW-GPR is mainly based on the theory of refraction, reflection and scattering of electromagnetic wave in the discontinuity of dielectric constant. So, the UWB antenna system, an important part of SFCW-GPR, becomes more indispensable. In this paper, an improved modified universal antenna is designed, simulated and fabricated. Based on a typical Bow-tie antenna, it is modified by the methods of lumped loads, cavity-backed l

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30

Qiua, Dong Dong, Yong Jiang Sun, Hua Song Jin, and Jian Cheng Yu. "Directional Pattern Measuring System Research of a TT&C Antenna." Advanced Materials Research 774-776 (September 2013): 1518–22. http://dx.doi.org/10.4028/www.scientific.net/amr.774-776.1518.

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Directional pattern is a clear visual representation form of antenna radiation characteristics. Taking a certain kind of shipborne radar as example, the basic principle of the directional pattern measurement was analyzed, the basic methods and execution scheme were introduced in detail. A directional pattern automatic testing system which was based on Lavbiew was researched on the basis of existed testing techniques, and finally the directional pattern automatic measurement was realized through the use of virtual instrument GPIB and serial interface techniques.

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Azizi, Mussyazwann Azizi Mustafa, Mohammad Nazrin Mohd Noh, Idnin Pasya, Ahmad Ihsan Mohd Yassin, and Megat Syahirul Amin Megat Ali. "Pedestrian detection using Doppler radar and LSTM neural network." IAES International Journal of Artificial Intelligence (IJ-AI) 9, no. 3 (September 1, 2020): 394. http://dx.doi.org/10.11591/ijai.v9.i3.pp394-401.

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<span lang="EN-US">Integration of radar systems as primary sensor with deep learning algorithms in driver assist systems is still limited. Its implementation would greatly help in continuous monitoring of visual blind spots from incoming pedestrians. Hence, this study proposes a single-input single-output based Doppler radar and long short-term memory (LSTM) neural network for pedestrian detection. The radar is placed in monostatic configuration at an angle of 45 degree from line of sight. Continuous wave with frequency of 1.9 GHz are continuously transmitted from the antenna. The return

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32

Ullah, Raza, Sadiq Ullah, Farooq Faisal, Rizwan Ullah, Dong-you Choi, Ashfaq Ahmad, and Babar Kamal. "High-Gain Vivaldi Antenna with Wide Bandwidth Characteristics for 5G Mobile and Ku-Band Radar Applications." Electronics 10, no. 6 (March 12, 2021): 667. http://dx.doi.org/10.3390/electronics10060667.

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In this paper, antipodal Vivaldi antenna is designed for 5th generation (5G) mobile communication and Ku-band applications. The proposed designed has three layers. The upper layer consists of eight-element array of split-shaped leaf structures, which is fed by a 1-to-8 power divider network. Middle layer is a substrate made of Rogers 5880. The bottom layer consists of truncated ground and shorter mirror-image split leaf structures. The overall size of the designed antenna is confined significantly to 33.31 × 54.96 × 0.787 (volume in mm3), which is equivalent to 2λo× 3.3λo× 0.05λo (λo is free-s

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33

Chen, Wei, Guiling Hu, Wenyang Han, Xiaomeng Zhang, Jincheng Wei, Xizhong Xu, and Xiangpeng Yan. "Research on the Quality of Asphalt Pavement Construction Based on Nondestructive Testing Technology." Coatings 12, no. 3 (March 14, 2022): 379. http://dx.doi.org/10.3390/coatings12030379.

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In order to better evaluate the construction quality of asphalt pavement, nondestructive testing techniques are used to inspect newly paved asphalt mixture pavement. The proposed system for the evaluation of asphalt pavement construction quality uses three-dimensional ground-penetrating radar (GPR) and a non-nuclear density gauge. The GPR and the non-nuclear density gauge test results were used to establish a dielectric constant–porosity model by fitting. This approach can more accurately determine the dielectric constant selection scheme of the GPR based on the average value of every 10 diele

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Campean, Emilia, Tiberiu Pavel Itul, Ionela Tanase, and Adrian Pisla. "Workspace Generation for a 2 - DOF Parallel Mechanism Using Neural Networks." Applied Mechanics and Materials 162 (March 2012): 121–30. http://dx.doi.org/10.4028/www.scientific.net/amm.162.121.

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The main purpose of the paper is to develop a neural network application destined to the workspace generation of a parallel mechanism, as an performant alternative to the workspace representation based on inverse kinematic model. The paper describes both algorithms. The initial testing was made for a parallel mechanism with two degrees of freedom that could be applied for the orientation of different systems like a TV satellite dish antennas, sun trackers, telescopes, cameras, radars etc.

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Urata, Katia, Josaphat Tetuko, Cahya E. Santosa, and Tor Viscor. "Development of an L-Band SAR Microsatellite Antenna for Earth Observation." Aerospace 5, no. 4 (December 17, 2018): 128. http://dx.doi.org/10.3390/aerospace5040128.

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A compact synthetic aperture radar microsatellite antenna operating in the L-band is presented. To reduce size and weight of the small spaceborne SAR, we utilize a lightweight deployable parabolic mesh reflector and operate at low Earth orbital altitudes. The antenna is a wrap-rib center-fed parabolic reflector with dedicated receiving and transmitting feeds. Antenna requirements are: gain better than 30 dBic, center frequency of 1.275 GHz with bandwidth of 28 MHz and circular polarization with axial ratio better than 3 dB. This work describes the development of a compact Circularly Polarized

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36

Gao, Lan, Chiara Dachena, Kaijun Wu, Alessandro Fedeli, Matteo Pastorino, Andrea Randazzo, Xiaoping Wu, and Sébastien Lambot. "Full-Wave Modeling and Inversion of UWB Radar Data for Wave Propagation in Cylindrical Objects." Remote Sensing 13, no. 12 (June 17, 2021): 2370. http://dx.doi.org/10.3390/rs13122370.

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The nondestructive characterization of cylindrical objects is needed in many fields, such as medical diagnostics, tree trunk inspection, or concrete column testing. In this study, the radar equation of Lambot et al. is combined with cylindrical Green’s functions to fully model and invert ultra-wideband (UWB) ground-penetrating radar (GPR) data and retrieve the properties of cylindrical objects. Inversion is carried out using a lookup table (LUT) approach followed by local optimization to ensure retrieval of the global minimum of the objective function. Numerical experiments were conducted to a

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37

Zhai, Shao Xiong. "Research on Drive Control Method of Scanning Mechanism of Radar Scatterometer Antenna." Advanced Materials Research 139-141 (October 2010): 1605–11. http://dx.doi.org/10.4028/www.scientific.net/amr.139-141.1605.

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A set of drive control system has been developed for the scanning drive system of radar scatterometer antenna, according to the requirements of its scanning motion for speed stability with three-phase AC permanent-magnet synchronous motor(PMSM) driven by sine wave current as the execute component. The system can achieve the aim of controlling motion trace. The system composition, matching design of characteristic parameters such as speed and torque as well as control realization method, are described in this paper and the testing of main system performances such as speed stability is also brie

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Delgado, Alfredo, Alexandre Novo, and Dirk B. Hays. "Data Acquisition Methodologies Utilizing Ground Penetrating Radar for Cassava (Manihot esculenta Crantz) Root Architecture." Geosciences 9, no. 4 (April 15, 2019): 171. http://dx.doi.org/10.3390/geosciences9040171.

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Cassava (Manihot esculenta Crantz), a root crop utilized as food and industrial starch product, develops and maintains its marketable product sub-surface. Often, however, it is difficult to determine the potentially marketable goods available at any given time due to the sub-surface nature of the product and the inability to non-destructively sample. This dilemma has provided an avenue for application of ground penetrating radar. Relatively available designs of this technology, however, are cumbersome and do not provide the efficiencies for field applications. The objective of this research wa

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Ivashov, Sergey I., Lorenzo Capineri, Timothy D. Bechtel, Vladimir V. Razevig, Masaharu Inagaki, Nikolay L. Gueorguiev, and Ahmet Kizilay. "Design and Applications of Multi-Frequency Holographic Subsurface Radar: Review and Case Histories." Remote Sensing 13, no. 17 (September 2, 2021): 3487. http://dx.doi.org/10.3390/rs13173487.

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Holographic subsurface radar (HSR) is not currently in widespread usage. This is due to a historical perspective in the ground-penetrating radar (GPR) community that the high attenuation of electromagnetic waves in most media of interest and the inability to apply time-varying gain to the continuous-wave (CW) HSR signal preclude sufficient effective penetration depth. While it is true that the fundamental physics of HSR, with its use of a CW signal, does not allow amplification of later (i.e., deeper) arrivals in lossy media (as is possible with impulse subsurface radar (ISR)), HSR has distinc

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40

Schwäbig, Christopher, Siying Wang, and Sabine Gütgemann. "Development of a millimetre wave based SAR real-time imaging system for three-dimensional non-destructive testing." tm - Technisches Messen 88, no. 7-8 (June 24, 2021): 488–97. http://dx.doi.org/10.1515/teme-2021-0029.

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Abstract The following article describes the development of a millimetre wave based real-time imaging system for three dimensional non-destructive testing of goods. For this purpose a rotating antenna is used which is fed from an FMCW radar. The received measuring data is processed with a SAR algorithm. Due to the fact that a reflexive measurement method is used, the integration of the system into existing systems is simplified. To make the computing power-intensive SAR image processing possible, the complete signal processing chain of the image processing is executed on the graphics card. The

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41

Dérobert, Xavier, Vincent Baltazart, Jean-Michel Simonin, Shreedhar Savant Todkar, Christophe Norgeot, and Ho-Yan Hui. "GPR Monitoring of Artificial Debonded Pavement Structures throughout Its Life Cycle during Accelerated Pavement Testing." Remote Sensing 13, no. 8 (April 11, 2021): 1474. http://dx.doi.org/10.3390/rs13081474.

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The paper gives an overview of a ground penetrating radar (GPR) experiment to survey debonding areas within pavement structure during accelerated pavement tests (APT) conducted on the university Gustave Eiffel’s fatigue carrousel. Thirteen artificial defect sections composed of three types of defects (Tack-free, Geotextile, and Sand-based) were embedded during the construction phase between the top and the base layers. The data were collected in two stages covering the entire life cycle of the pavement structure using four GPR systems: An air-coupled ultra-wideband GPR (SF-GPR), two wideband 2

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42

Kauffmann, Jens, Ganesh Rajagopalan, Kazunori Akiyama, Vincent Fish, Colin Lonsdale, Lynn D. Matthews, and Thushara Pillai. "The Haystack Telescope as an Astronomical Instrument." Galaxies 11, no. 1 (January 4, 2023): 9. http://dx.doi.org/10.3390/galaxies11010009.

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The Haystack Telescope is an antenna with a diameter of 37 m and an elevation-dependent surface accuracy of ≤100μm that is capable of millimeter-wave observations. The radome-enclosed instrument serves as a radar sensor for space situational awareness, with about one-third of the time available for research by MIT Haystack Observatory. Ongoing testing with the K-band (18–26 GHz) and W-band receivers (currently 85–93 GHz) is preparing the inclusion of the telescope into the Event Horizon Telescope (EHT) array and the use as a single-dish research telescope. Given its geographic location, the ad

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43

Widodo, Widodo, Kurnia Anwar Ra’if, Muhammad Aldi Firdaus, and Ibnu Thoriq Hidayatullah. "GMODL: An Indonesian MATLAB-based ground-penetrating radar data modeling and processing software." IOP Conference Series: Earth and Environmental Science 1031, no. 1 (May 1, 2022): 012026. http://dx.doi.org/10.1088/1755-1315/1031/1/012026.

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Abstract Ground-penetrating radar (GPR) data modeling and processing is crucial to near-surface geophysics. Its use in geohazard mitigation, construction, shallow hydrocarbon contamination, and other shallow subsurface detection is undeniable due to its high-resolution imaging. GPR software (MATGPR) that we used currently requires access to MATLAB which not everybody can use because of its licensing prices. Thus, we developed this program (GMODL) that uses finite-difference time-domain (FDTD) and split-step Fourier algorithms. To test the software, we created synthetic models. The synthetic mo

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Tatu, Serioja Ovidiu, and Emilia Moldovan. "Millimeter Wave Multi-Port Interferometric Radar Sensors: Evolution of Fabrication and Characterization Technologies." Sensors 20, no. 19 (September 24, 2020): 5477. http://dx.doi.org/10.3390/s20195477.

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Recent advances in millimeter wave technologies, both in component and system design, in line with important size and cost reductions, have opened up new applications in ultra-high-speed wireless communications, radar and imaging sensors. The paper presents the evolution of millimeter wave circuit and modules fabrication and characterization technologies in the past decades. Novel planar low-cost fabrication technologies have been successfully developed in this period. In combination with the standard rectangular wave-guide technology, these offer great opportunities for prototyping and testin

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45

Darnitskyi, Y., V. Lyashenko, S. Shvets та T. Pavliuk. "ANALYSIS OF PECULIARITIES FOR USE OF MUZZLE VELOCITY MEASUREMENT SYSTEM SL – 520PЕ AND DOPPLER RADAR TRAJECTORY MEASUREMENT SYSTEM MFTR–2100/40 DURING TESTS OF ROCKET AND ARTILLERY ARMAMENT". Наукові праці Державного науково-дослідного інституту випробувань і сертифікації озброєння та військової техніки, № 12 (5 липня 2022): 29–40. http://dx.doi.org/10.37701/dndivsovt.12.2022.04.

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The article presents a comparative analysis of test results in which the SL–520PЕ muzzle velocity measurement system and the MFTR – 2100/40 Doppler radar system were used. A set of recommendations is proposed, which are aimed at improving the efficiency of the organization and the quality of tests during which the parameters of the initial (muzzle) velocity of the measured objects are determined. Qualitative testing of a wide range of new and modernized models of rocket and artillery armament largely depends on modern radar measurement systems. Recently, the Armed Forces of Ukraine

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46

Wahab, S. W., D. N. Chapman, C. D. F. Rogers, K. Y. Foo, N. Metje, S. W. Nawawi, M. N. Isa, and A. Madun. "ASSESSING THE CONDITION OF BURIED PIPE USING GROUND PENETRATING RADAR (GPR)." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-4/W9 (October 26, 2018): 77–81. http://dx.doi.org/10.5194/isprs-archives-xlii-4-w9-77-2018.

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<p><strong>Abstract.</strong> The invention of Ground Penetrating Radar (GPR) technology has facilitated the possibility of detecting buried utilities and has been used primarily in civil engineering for detecting structural defects, such as voids and cavities in road pavements, slabs and bridge decks, but has not been used to assess the condition of buried pipes. Pipe deterioration can be defined as pipes where, for example, cracking, differential deflection, missing bricks, collapses, holes, fractures and corrosion exists. Assessing the deterioration of underground pipes is

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47

Zou, Lilong, Yan Wang, Iraklis Giannakis, Fabio Tosti, Amir M. Alani, and Motoyuki Sato. "Mapping and Assessment of Tree Roots Using Ground Penetrating Radar with Low-Cost GPS." Remote Sensing 12, no. 8 (April 20, 2020): 1300. http://dx.doi.org/10.3390/rs12081300.

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In this paper, we have presented a methodology combining ground penetrating radar (GPR) and a low-cost GPS receiver for three-dimensional detection of tree roots. This research aims to provide an effective and affordable testing tool to assess the root system of a number of trees. For this purpose, a low-cost GPS receiver was used, which recorded the approximate position of each GPR track, collected with a 500 MHz RAMAC shielded antenna. A dedicated post-processing methodology based on the precise position of the satellite data, satellite clock offsets data, and a local reference Global Naviga

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48

Palandro, David, Tim Nedwed, Steve Altobelli, Eiichi Fukushima, Mark Conradi, Nick Sowko, and Erik DeMicco. "Oil in and under Ice Detection using Nuclear Magnetic Resonance." International Oil Spill Conference Proceedings 2017, no. 1 (May 1, 2017): 1877–89. http://dx.doi.org/10.7901/2169-3358-2017.1.1877.

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ABSTRACT (2017-387) The application of existing remote sensing sensors and technologies for the detection of oil in and under ice is an ongoing and active research area. Currently, the suite of sensors that have and are being tested include acoustic, radar, optical and fluorosensors. Another technology being tested is Nuclear Magnetic Resonance (NMR) in the earth’s magnetic field. NMR to detect oil in and under ice has undergone extensive testing since 2006 and results to date have been promising. Field tests performed using a prototype 1 × 1 m flat transmitting/receiving antenna coil have dif

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49

Schouten, Girmi, Wouter Jansen, and Jan Steckel. "Simulation of Pulse-Echo Radar for Vehicle Control and SLAM." Sensors 21, no. 2 (January 13, 2021): 523. http://dx.doi.org/10.3390/s21020523.

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Pulse-echo sensing is the driving principle behind biological echolocation as well as biologically-inspired sonar and radar sensors. In biological echolocation, a single emitter sends a self-generated pulse into the environment which reflects off objects. A fraction of these reflections are captured by two receivers as echoes, from which information about the objects, such as their position in 3D space, can be deduced by means of timing, intensity and spectral analysis. This is opposed to frequency-modulated continuous-wave radar, which analyses the shift in frequency of the returning signal t

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50

Joo, Jeong-Myeong, Jin-Young Hong, Sang-Jin Shin, Dong-Hyeon Kim, and Yisok Oh. "Effects of Antenna Modeling in 2-D FDTD Simulation of an Ultra-Wide Band Radar for Nondestructive Testing of a Concrete Wall." Journal of Korean Institute of Electromagnetic Engineering and Science 24, no. 1 (January 30, 2013): 98–105. http://dx.doi.org/10.5515/kjkiees.2013.24.1.98.

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