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Автор: Grafiati
Опубліковано: 6 вересня 2023

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Статті в журналах з теми "Antenna applications- Microwave"

1

Kurdyanto, Rachmat Agus, Nurhayati Nurhayati, Puput Wanarti Rusimamto, and Farid Baskoro. "STUDY COMPARATIVE OF ANTENNA FOR MICROWAVE IMAGING APPLICATIONS." INAJEEE Indonesian Journal of Electrical and Eletronics Engineering 3, no. 2 (August 28, 2020): 41. http://dx.doi.org/10.26740/inajeee.v3n2.p41-47.

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Анотація:
AbstractMicrowave can be applied for telecommunicaions, radar and microwave imaging. This wave has been widely used in everyday life, such as in the industrial word in the fields of robotics, microwave vision, imaging burrier objects, vehicular guidance, biomedical imaging, remote sensing, wheater radar, target tracking, and other apllications. Microwave imaging is a technology that uses electromagnetic waves at frequencies from Megahertz to Gigahertz. Utilization of microwave imaging in addition to information technology and telecommunications, this wave application can be used to process an image because of its ability to penetrate dielectric materials. The purpose of writing this article is to determine microwave imaging application, the working principle of antennas used for microwave imaging applications and antenna specifications used for microwave imaging applications. Microwave imaging research has been carried out using several different type of antennas such as vivaldi and monopole antennas. Where the signal tha is transmitted and will be exposed to the object will send a different return signal so that an image of an object will be obtained which will be processed on the computer. The working frequency of the antenna for microwave imaging applications is in a wide frequency range (UWB antenna). The antennas that are applied include the vivaldi antenna which works at a frequency of 1-11 GHz and a monopole antenna that works at a frequency 1,25-2,4 GHz for biomedical imaging applications, while for radar applications in the construction field it can use a frequency of 0,5-40 GHz.
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2

Kumar, Ravi, Anchal Garg, Heli Shah, and Bhupinder Kaur. "Survey on performance parameters of planar microwave antennas." International Journal of Experimental Research and Review 31, Spl Volume (July 30, 2023): 186–94. http://dx.doi.org/10.52756/10.52756/ijerr.2023.v31spl.017.

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Анотація:
Planar antennas, which include microstrip antennas and printed circuit board antennas, are used in telecommunications. This study aims to provide an overview of microstrip antennas for diverse applications. Microstrip patch antenna design is a new study topic that has been established for usage in 5th-generation communication applications. An antenna is a group of connected devices that serve as a single antenna to broadcast or receive radio waves. Antennas come in a variety of designs and sizes. The paper discusses several printed microstrip antenna designs, such as rectangular to circular, broadband, dual-band, millimeter-wave and microstrip arrays. The microstrip patch is an antenna layout that is lightweight, low-profile, and results-oriented. Microstrip patch antennas may be employed in various 6G communication system applications in the future. This paper examines antenna geometric structures, antenna analysis methodologies, antenna dimensions and many different types of antennas. It will also go over the substrate materials, loss tangent, thickness, return loss, bandwidth, voltage-standing-wave-ratio (VSWR), gain, and directivity so that an optimized antenna can be designed and fabricated having excellent characteristics for use in modern applications by the promising academic researchers in the near future.
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3

Opaluch, Oliver Roman, Nimba Oshnik, Richard Nelz, and Elke Neu. "Optimized Planar Microwave Antenna for Nitrogen Vacancy Center Based Sensing Applications." Nanomaterials 11, no. 8 (August 19, 2021): 2108. http://dx.doi.org/10.3390/nano11082108.

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Анотація:
Individual nitrogen vacancy (NV) color centers in diamond are versatile, spin-based quantum sensors. Coherently controlling the spin of NV centers using microwaves in a typical frequency range between 2.5 and 3.5 GHz is necessary for sensing applications. In this work, we present a stripline-based, planar, Ω-shaped microwave antenna that enables one to reliably manipulate NV spins. We found an optimal antenna design using finite integral simulations. We fabricated our antennas on low-cost, transparent glass substrate. We created highly uniform microwave fields in areas of roughly 400 × 400 μm2 while realizing high Rabi frequencies of up to 10 MHz in an ensemble of NV centers.
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4

Durachman, Yusuf. "Fabrication of Horn Antenna for Microwave Application." International Innovative Research Journal of Engineering and Technology 6, no. 2 (December 30, 2020): EC—17—EC—27. http://dx.doi.org/10.32595/iirjet.org/v6i2.2020.138.

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Анотація:
This paper contains a novel design of a horn antenna control system for microwave applications. Using “Fermat’s principle” the horn antenna is designed and fabricated. For microwave applications, high gain and low voltage standing wave ratio(VSWR) is needed, so for that purpose horn antenna is fabricated. In a previous paper, they designed the Yagi Uda antenna which is used for multiple driven elements by the method called maximum power transmission efficiency. For multiple driven elements, the horn antenna cannot be fabricated. If suppose yagi uda is fabricated using the principle called Fermat's, the system can't achieve more gain and low voltage standing wave ratio. Yagi uda antenna can achieve only a high voltage standing wave ratio. To reduce the problems in the existing paper, our paper designs a horn antenna to achieve high gain and low voltage standing wave ratio( VSWR) which is used for microwave applications to transmit microwaves from a waveguide out into space or collect microwaves into a waveguide for the reception.
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Rafique, Umair, Stefano Pisa, Renato Cicchetti, Orlandino Testa, and Marta Cavagnaro. "Ultra-Wideband Antennas for Biomedical Imaging Applications: A Survey." Sensors 22, no. 9 (April 22, 2022): 3230. http://dx.doi.org/10.3390/s22093230.

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Анотація:
Microwave imaging is an active area of research that has garnered interest over the past few years. The main desired improvements to microwave imaging are related to the performances of radiating systems and identification algorithms. To achieve these improvements, antennas suitable to guarantee demanding requirements are needed. In particular, they must operate in close proximity to the objects under examination, ensure an adequate bandwidth, as well as reduced dimensions and low production costs. In addition, in near-field microwave imaging systems, the antenna should provide an ultra-wideband (UWB) response. Given the relevance of the foreseen applications, many UWB antenna designs for microwave imaging applications have been proposed in the literature. In this paper, a comprehensive review of different UWB antenna designs for near-field microwave imaging is presented. The antennas are classified according to the manufacturing technology and radiative performances. Particular attention is also paid to the radiation mechanisms as well as the techniques used to reduce the size and improve the bandwidth.
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6

Ramya, M., V. Parthipan, and M. Yogadeepan. "Certain Investigations on Edge Fed Microstrip Patch Array Antenna for WiMAX Applications." Asian Journal of Electrical Sciences 4, no. 1 (May 5, 2015): 1–7. http://dx.doi.org/10.51983/ajes-2015.4.1.1937.

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Анотація:
Recently, a new wireless technology, i.e., Worldwide interoperability for Microwave Access (WiMAX), has been demonstrated to have its strong potential to provide a very high speed of broadband services. By simultaneously using multiple antennas at transmitter and receiver sites, these systems exploit the spatial dimension of the propagation channel. The development of such antennas includes the design of array antenna, optimizing the array antenna parameters and thereby increasing its performance. This paper mainly focuses on design of single microstrip patch antennae and linear array configurations by optimizing the various antenna parameters such as directivity, gain, Mutual coupling and beamwidth etc., Microstrip array antennae designed and simulated using IE3D for WiMAX application operating at 2.4GHz and the same configurations are also optimized and analyzed. In this analysis, upon comparing the parameters such as gain, directivity, return loss and 3-dB beamwidth quantitatively it is proposed that the linear array promises very narrow beamwidth with optimized gain.
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7

Haider, Amir, MuhibUr Rahman, Mahdi Naghshvarianjahromi, and Hyung Seok Kim. "Time-Domain Investigation of Switchable Filter Wide-Band Antenna for Microwave Breast Imaging." Sensors 20, no. 15 (August 1, 2020): 4302. http://dx.doi.org/10.3390/s20154302.

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Анотація:
This paper investigates the time-domain performance of a switchable filter impulse radio ultra-wideband (IR-UWB) antenna for microwave breast imaging applications. A miniaturized CPW-fed integrated filter antenna with switchable performance in the range of the Worldwide Interoperability for Microwave Access (WiMAX) and Wireless Local Area Network (WLAN) bands could operate well within a 3.0 to 11 GHz frequency range. The time-domain performance of the filter antenna was investigated in comparison to that of the designed reference wideband antenna. By comparing both antennas’ time-domain characteristics, it was seen that the switchable filter antenna had good time-domain resolution along with the frequency-domain operation. Additionally, the time-domain investigation revealed that the switchable filter wide-band antenna performed similarly to the reference wide band antenna. This antenna was also utilized for a tumor detection application, and it was seen that the switchable filter wide-band antenna could detect a miniaturized irregularly shaped tumor easily, which is quite promising. Such an antenna with a good time-domain resolution and tumor detection capability will be a good candidate and will find potential applications in microwave breast imaging.
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8

Öziş, E., A. V. Osipov, and T. F. Eibert. "Metamaterials for Microwave Radomes and the Concept of a Metaradome: Review of the Literature." International Journal of Antennas and Propagation 2017 (2017): 1–13. http://dx.doi.org/10.1155/2017/1356108.

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Анотація:
A radome is an integral part of almost every antenna system, protecting antennas and antenna electronics from hostile exterior conditions (humidity, heat, cold, etc.) and nearby personnel from rotating mechanical parts of antennas and streamlining antennas to reduce aerodynamic drag and to conceal antennas from public view. Metamaterials are artificial materials with a great potential for antenna design, and many studies explore applications of metamaterials to antennas but just a few to the design of radomes. This paper discusses the possibilities that metamaterials open up in the design of microwave radomes and introduces the concept of metaradomes. The use of metamaterials can improve or correct characteristics (gain, directivity, and bandwidth) of the enclosed antenna and add new features, like band-pass frequency behavior, polarization transformations, the ability to be switched on/off, and so forth. Examples of applications of metamaterials in the design of microwave radomes available in the literature as well as potential applications, advantages, drawbacks, and still open problems are described.
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Qu, Ming Zhe. "Research on the Applications and Measurements of the Microwave Technology." Applied Mechanics and Materials 556-562 (May 2014): 3176–79. http://dx.doi.org/10.4028/www.scientific.net/amm.556-562.3176.

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Анотація:
Microwave technology is extensively used for point-to-point telecommunications. Microwaves are especially suitable for this use since they are more easily focused into narrower beams than radio waves, allowing frequency reuse; their comparatively higher frequencies allow broad bandwidth and high data transmission rates, and antenna sizes are smaller than at lower frequencies because antenna size is inversely proportional to transmitted frequency. Microwaves are used in spacecraft communication, and much of the world’s data, TV, and telephone communications are transmitted long distances by microwaves between ground stations and communications satellites. Microwaves are also employed in microwave ovens and in radar technology. The prefix “micro-” in “microwave” indicates that microwaves are “small” compared to waves used in typical radio broadcasting, in that they have shorter wavelengths. The boundaries between far infrared light, terahertz radiation, microwaves, and ultra-high-frequency radio waves are fairly arbitrary and are used variously between different fields of study.
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10

Gu, Chunwang, Hao Liu, and Min Yi. "Lightweight Fan-Beam Microstrip Grid Antenna for Airborne Microwave Interferometric Radiometer Applications." Micromachines 14, no. 1 (January 15, 2023): 228. http://dx.doi.org/10.3390/mi14010228.

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Анотація:
The microwave interferometric radiometer (MIR) uses aperture synthesis technology to equate multiple small-aperture antennas into a large-aperture antenna to improve spatial resolution. At present, MIR antennas that operate at frequencies above the C-band mostly use horn antennas, waveguide slot antennas, etc., which have the disadvantages of a high profile and large mass. In this paper, a new type of miniaturized, low-profile, and lightweight K-band fan-beam microstrip grid antenna is designed for the airborne campaign of the K-band one-dimensional MIR of a Microwave Imager Combined Active and Passive (MICAP) onboard a Chinese Ocean Salinity Mission (COSM). With a limited size constraint (12.33 mm) on the antenna width, a fan-beam shape antenna pattern was achieved with a 5.34° 3-dB beamwidth in the narrow beam direction and up to a 55° 3-dB beamwidth in the fan-beam direction. A periodic structural unit is proposed in this paper to reduce the design complexity of Taylor weighting, achieving desirable performances on gain (19.1 dB) and sidelobe level (<−20 dB) in the H-plane. Four antenna elements were fabricated and arranged in a non-redundant sparse array. The performance of the four-element sparse array was evaluated with a simulation and real measurement in an anechoic chamber. The coupling between antenna elements was less than −25 dB, and the consistency of phase patterns was better than 3.4°. These results verify the feasibility of the proposed K-band microstrip grid antenna for airborne MIR applications.
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Дисертації з теми "Antenna applications- Microwave"

1

Zhang, Tieren, University of Western Sydney, of Science Technology and Environment College, and School of Engineering and Industrial Design. "Applications of microwave holography to the assessment of antennas and antenna arrays." THESIS_CSTE_EID_Zhang_T.xml, 2001. http://handle.uws.edu.au:8081/1959.7/770.

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Анотація:
Gabor's original holography, which is the basic theory of modern microwave holographic techniques, is introduced. By computer simulations, it is demonstrated that the conventional holographic approach can be used as a tool to reconstruct aperture field distributions of an antenna with some constraints. Computer simulations of the theory and technique of the improved microwave holographic approach originally introduced by Rahmat-Samii et al. are carried out. The results show that it can be used for surface distortion diagnosis of large reflector antennas. The physical optics integral formulation is derived by general solutions of the vector wave equations. The necessary theory , which is needed to reconstruct the aperture field from near-field measurements both in a rectangular coordinate system and in a cylindrical coordinate system is developed. It is based on the plane wave spectrum and the vector wave modal expansion of an electromagnetic field. By using a simple dipole and other well-defined antennas, computer simulations have been performed. The results show that the technique is rigorous and applicable. It is also demonstrated that the sampling intervals and the number of sampling points should be chosen carefully in order to obtain a satisfactory resolution of the reconstructed aperture field. Furthermore, the simulations carried out in this work reveal that the real aperture field distribution of a dipole antenna has a maximum point at each end of the antenna. This characteristic can only be obtained at a very close distance to the antenna. This study also reveals the significant contributions of the evanescent waves to the aperture reconstruction. A simple but effective method for examining the evanescent waves from the measured near-field is also presented. By using dipoles and other well known antennas and antenna arrays, the experiments were carried out. The experimental results provide reasonable good agreements with the simulations. The technique proposed is effective and accurate.
Doctor of Philosophy (PhD)
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2

Zhang, Tieren. "Applications of microwave holography to the assessment of antennas and antenna arrays." Thesis, View thesis, 2001. http://handle.uws.edu.au:8081/1959.7/770.

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Анотація:
Gabor's original holography, which is the basic theory of modern microwave holographic techniques, is introduced. By computer simulations, it is demonstrated that the conventional holographic approach can be used as a tool to reconstruct aperture field distributions of an antenna with some constraints. Computer simulations of the theory and technique of the improved microwave holographic approach originally introduced by Rahmat-Samii et al. are carried out. The results show that it can be used for surface distortion diagnosis of large reflector antennas. The physical optics integral formulation is derived by general solutions of the vector wave equations. The necessary theory , which is needed to reconstruct the aperture field from near-field measurements both in a rectangular coordinate system and in a cylindrical coordinate system is developed. It is based on the plane wave spectrum and the vector wave modal expansion of an electromagnetic field. By using a simple dipole and other well-defined antennas, computer simulations have been performed. The results show that the technique is rigorous and applicable. It is also demonstrated that the sampling intervals and the number of sampling points should be chosen carefully in order to obtain a satisfactory resolution of the reconstructed aperture field. Furthermore, the simulations carried out in this work reveal that the real aperture field distribution of a dipole antenna has a maximum point at each end of the antenna. This characteristic can only be obtained at a very close distance to the antenna. This study also reveals the significant contributions of the evanescent waves to the aperture reconstruction. A simple but effective method for examining the evanescent waves from the measured near-field is also presented. By using dipoles and other well known antennas and antenna arrays, the experiments were carried out. The experimental results provide reasonable good agreements with the simulations. The technique proposed is effective and accurate.
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3

Zhang, Tieren. "Applications of microwave holography to the assessment of antennas and antenna arrays." View thesis, 2001. http://library.uws.edu.au/adt-NUWS/public/adt-NUWS20040330.103805/index.html.

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Анотація:
Thesis (Ph.D.) -- University of Western Sydney, 2001.
"Submitted in fulfilment of requirements for the degree of Doctor of Philosophy, School of Engineering and Industrial Design, University of Western Sydney" Includes bibliography.
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4

Gagnon, Nicolas. "Phase Shifting Surface (PSS) and Phase and Amplitude Shifting Surface (PASS) for Microwave Applications." Thesis, Université d'Ottawa / University of Ottawa, 2011. http://hdl.handle.net/10393/19826.

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Анотація:
This thesis describes an electrically thin surface used for electromagnetic applications in the microwave regime. The surface is free-standing and its primary purpose is to modify the phase distribution, or the phase and amplitude distribution of electromagnetic fields propagating through it: it is called phase shifting surface (PSS) in the first case, and phase and amplitude shifting surface (PASS) in the second case. For practical applications, the surface typically comprises three or four layers of metallic patterns spaced by dielectric layers. The patterns of the metallic layers are designed to locally alter the phase (and amplitude in the case of the PASS) of an incoming wave to a prescribed set of desired values for the outgoing wave. The PSS/PASS takes advantage of the reactive coupling by closely spacing of the metallic layers, which results in a larger phase shift range while keeping the structure significantly thin. The PSS concept is used to design components such as gratings and lens antennas which are presented in this document. The components are designed for an operating frequency of 30 GHz. The PSS phase grating gives high diffraction efficiency, even higher than a dielectric phase grating. Several types of lens antennas are also presented, which show comparable performance to that of a conventional dielectric plano-hyperbolic lens antenna with similar parameters. The PASS concept is used in a beam shaping application in which a flat-topped beam antenna is designed. This work demonstrates the potential for realising thin, lightweight and low-cost antennas at Ka band, in particular for substituting higher-gain antenna technologies such as conventional dielectric shaped lens antennas.
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5

Guardiola, Garcia Marta. "Multi-antenna multi-frequency microwave imaging systems for biomedical applications." Doctoral thesis, Universitat Politècnica de Catalunya, 2013. http://hdl.handle.net/10803/134967.

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Анотація:
Medical imaging refers to several different technologies that are used to view the human body in order to diagnose, monitor, or treat medical conditions. Each type of technology gives different information about the area of the body being studied depending on the radiation used to illuminate de body. Nowadays there are still several lesions that cannot be detected with the current methods in a curable stage of the disease. Moreover they present some drawbacks that limit its use, such as health risk, high price, patient discomfort, etc. In the last decades, active microwave imaging systems are being considered for the internal inspection of light-opaque materials thanks to its capacity to penetrate and differentiate their constituents based on the contrast in dielectric properties with a sub-centimeter resolution. Moreover, they are safe, relatively low-cost and portable. Driven by the promising precedents of microwaves in other fields, an active electromagnetic research branch was focused to medical microwave imaging. The potential in breast cancer detection, or even in the more challenging brain stroke detection application, were recently identified. Both applications will be treated in this Thesis. Intensive research in tomographic methods is now devoted to develop quantitative iterative algorithms based on optimizing schemes. These algorithms face a number of problems when dealing with experimental data due to noise, multi-path or modeling inaccuracies. Primarily focused in robustness, the tomographic algorithm developed and assessed in this thesis proposes a non-iterative and non-quantitative implementation based on a modified Born method. Taking as a reference the efficient, real-time and robust 2D circular tomographic method developed in our department in the late 80s, this thesis proposes a novel implementation providing an update to the current state-of-the-art. The two main contributions of this work are the 3D formulation and the multi-frequency extension, leading to the so-called Magnitude Combined (MC) Tomographic algorithm. First of all, 2D algorithms were only applicable to the reconstruction of objects that can be assumed uniform in the third dimension, such as forearms. For the rest of the cases, a 3D algorithm was required. Secondly, multi-frequency information tends to stabilize the reconstruction removing the frequency selective artifacts while maintaining the resolution of the higher frequency of the band. This thesis covers the formulation of the MC tomographic algorithm and its assessment with medically relevant scenarios in the framework of breast cancer and brain stroke detection. In the numerical validation, realistic models from magnetic resonances performed to real patients have been used. These models are currently the most realistic ones available to the scientific community. Special attention is devoted to the experimental validation, which constitutes the main challenge of the microwave imaging systems. For this reason, breast phantoms using mixtures of chemicals to mimic the dielectric properties of real tissues have been manufactured and an acquisition system to measure these phantoms has been created. The results show that the proposed algorithm is able to provide robust images of medically realistic scenarios and detect a malignant breast lesion and a brain hemorrhage, both at an initial stage.
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6

Neumann, Niels. "Microwave Photonic Applications - From Chip Level to System Level." Vogt Verlag, 2018. https://tud.qucosa.de/id/qucosa%3A74806.

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Анотація:
Die Vermischung von Mikrowellen- und optischen Technologien – Mikrowellenphotonik – ist ein neu aufkommendes Feld mit hohem Potential. Durch die Nutzung der Vorzüge beider Welten hat die Mikrowellenphotonik viele Anwendungsfälle und ist gerade erst am Beginn ihrer Erfolgsgeschichte. Der Weg für neue Konzepte, neue Komponenten und neue Anwendungen wird dadurch geebnet, dass ein höherer Grad an Integration sowie neue Technologien wie Silicon Photonics verfügbar sind. In diesem Werk werden zuerst die notwendigen grundlegenden Basiskomponenten – optische Quelle, elektro-optische Wandlung, Übertragungsmedium und opto-elektrische Wandlung – eingeführt. Mithilfe spezifischer Anwendungsbeispiele, die von Chipebene bis hin zur Systemebene reichen, wird der elektrooptische Codesign-Prozess veranschaulicht. Schließlich werden zukünftige Ausrichtungen wie die Unterstützung von elektrischen Trägern im Millimeterwellen- und THz-Bereich sowie Realisierungsoptionen in integrierter Optik und Nanophotonik diskutiert.
The hybridization between microwave and optical technologies – microwave photonics – is an emerging field with high potential. Benefitting from the best of both worlds, microwave photonics has many use cases and is just at the beginning of its success story. The availability of a higher degree of integration and new technologies such as silicon photonics paves the way for new concepts, new components and new applications. In this work, first, the necessary basic building blocks – optical source, electro-optical conversion, transmission medium and opto-electrical conversion – are introduced. With the help of specific application examples ranging from chip level to system level, the electro-optical co-design process for microwave photonic systems is illustrated. Finally, future directions such as the support of electrical carriers in the millimeter wave and THz range and realization options in integrated optics and nanophotonics are discussed.
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7

Kokkinos, Titos. "Analysis and design of metamaterial-inspired microwave structures and antenna applications." Thesis, Loughborough University, 2010. https://dspace.lboro.ac.uk/2134/6094.

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Анотація:
Novel metamaterial and metamaterial-inspired structures and microwave/antenna applications thereof are proposed and studied in this thesis. Motivated by the challenge of extending the applicability of metamaterial structures into practical microwave solutions, the underlying objective of this thesis has been the design of low-cost, easily fabricated and deployable metamaterial-related devices and the development of computational tools for the analysis of those. For this purpose, metamaterials composed of tightly coupled resonators are chosen for the synthesis of artificial transmission lines and enabling antenna applications. Specifically, fully-printed double spiral resonators are employed as modular elements for the design of tightly coupled resonators arrays. After thoroughly investigating the properties of such resonators, they are used for the synthesis of artificial lines in either grounded or non-grounded configurations. In the first case, the supported backward waves are exploited for the design of microstrip-based filtering/diplexing devices and series-fed antenna arrays. In the second case, the effective properties of such structures are employed for the design of a novel class of self-resonant, low-profile folded monopoles, exhibiting low mutual coupling and robust radiating properties. Such monopoles are, in turn, used for the synthesis of different sub-wavelength antenna arrays, such as superdirective arrays. Finally, an in-home periodic FDTD-based computational tool is developed and optimized for the efficient and rigorous analysis of planar, metamaterial-based, high-gain antennas.
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8

Rodrigues, Dário Barros. "Target-specific multiphysics modeling for thermal medicine applications." Doctoral thesis, Faculdade de Ciências e Tecnologia, 2013. http://hdl.handle.net/10362/11296.

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Анотація:
Dissertation to obtain the degree of Doctor of Philosophy in Biomedical Engineering
This thesis addresses thermal medicine applications on murine bladder hyperthermia and brain temperature monitoring. The two main objectives are interconnected by the key physics in thermal medicine: heat transfer. The first goal is to develop an analytical solution to characterize the heat transfer in a multi-layer perfused tissue. This analytical solution accounts for important thermoregulation mechanisms and is essential to understand the fundamentals underlying the physical and biological processes associated with heat transfer in living tissues. The second objective is the development of target-specific models that are too complex to be solved by analytical methods. Thus, the software for image segmentation and model simulation is based on numerical methods and is used to optimize non-invasive microwave antennas for specific targets. Two examples are explored using antennas in the passive mode (probe) and active mode (applicator). The passive antenna consists of a microwave radiometric sensor developed for rapid non-invasive feedback of critically important brain temperature. Its design parameters are optimized using a power-based algorithm. To demonstrate performance of the device, we build a realistic model of the human head with separate temperaturecontrolled brain and scalp regions. The sensor is able to track brain temperature with 0.4 °C accuracy in a 4.5 hour long experiment where brain temperature is varied in a 37 °C, 27 °C and 37 °C cycle. In the second study, a microwave applicator with an integrated cooling system is used to develop a new electro-thermo-fluid (multiphysics) model for murine bladder hyperthermia studies. The therapy procedure uses a temperature-based optimization algorithm to maintain the bladder at a desired therapeutic level while sparing remaining tissues from dangerous temperatures. This model shows that temperature dependent biological properties and the effects of anesthesia must be accounted to capture the absolute and transient temperature fields within murine tissues. The good agreement between simulation and experimental results demonstrates that this multiphysics model can be used to predict internal temperatures during murine hyperthermia studies.
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9

GUGLIANDOLO, GIOVANNI. "Applications of Microwave Resonators to Thermal Metrology." Doctoral thesis, Politecnico di Torino, 2020. http://hdl.handle.net/11583/2849028.

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10

Kilic, Ozgehan. "Defected Ground Structure And Its Applications To Microwave Devices And Antenna Feed Networks." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12612415/index.pdf.

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Анотація:
This thesis reports the analysis of the rectangular shaped defected ground structure (RS-DGS) and the application of the structure on some microwave devices. DGS is analyzed in terms of its superior properties, which enables the designers to easily realize many kind of microwave devices which are impossible to achieve with the standard applications. Within the scope of this thesis, the focus is on the rectangular shaped DGS and its characteristic properties. The basic slow wave and high impedance characteristics are utilized in the design of some microwave devices. The design is carried on at the two different frequency bands: X-band and Ka band, centering at 10 GHz and 35 GHz, respectively. Finally, using the high impedance property and the coupling between the defects, a wide band 1 : 4 beam forming network is designed and implemented at 10 GHz.
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Книги з теми "Antenna applications- Microwave"

1

Otoshi, Tommy Yasuo. Noise temperature theory and applications for deep space communications antenna systems. Boston: Artech House, 2008.

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2

Farmer, Jeffery T. Thermal-distortion analysis of an antenna strongback for geostationary high-frequency microwave applications. Hampton, Va: Langley Research Center, 1990.

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3

Windyka, John. System-level integrated circuit (SLIC) technology development for phased array antenna applications. [Washington, DC: National Aeronautics and Space Administration, 1997.

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4

Windyka, John. System-level integrated circuit (SLIC) technology development for phased array antenna applications. [Washington, DC: National Aeronautics and Space Administration, 1997.

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5

Windyka, John. System-level integrated circuit (SLIC) technology development for phased array antenna applications. [Washington, DC: National Aeronautics and Space Administration, 1997.

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6

Windyka, John. System-level integrated circuit (SLIC) technology development for phased array antenna applications. [Washington, DC: National Aeronautics and Space Administration, 1997.

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7

M, Wahls Deborah, Wright Robert L. 1935-, and Langley Research Center, eds. Thermal-distortion analysis of an antenna strongback for geostationary high-frequency microwave applications. Washington, D.C: National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Division, 1990.

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8

M, Wahls Deborah, Wright Robert L. 1935-, and Langley Research Center, eds. Thermal-distortion analysis of an antenna strongback for geostationary high-frequency microwave applications. Washington, D.C: National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Division, 1990.

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9

Fourikis, Nicholas. Phased array-based systems and applications. New York: Wiley, 1997.

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10

Rabinovich, Victor. Antenna Arrays and Automotive Applications. New York, NY: Springer New York, 2013.

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Частини книг з теми "Antenna applications- Microwave"

1

Singh, Amit K., Mahesh P. Abegaonkar, and Shiban Kishen Koul. "Microwave Metamaterial Absorbers." In Metamaterials for Antenna Applications, 153–91. Boca Raton: CRC Press, 2021. http://dx.doi.org/10.1201/9781003045885-7.

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2

Islam, Mohammad Tariqul, and Amran Hossain. "Metamaterial Inspired Stacked Antenna Based Microwave Brain Imaging." In Metamaterial for Microwave Applications, 221–62. Boca Raton: CRC Press, 2023. http://dx.doi.org/10.1201/9781003358152-8.

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3

Islam, Mohammad Tariqul, and Mohammad Shahidul Islam. "Microwave Head Imaging and 3D Metamaterial-inspired Antenna." In Metamaterial for Microwave Applications, 175–220. Boca Raton: CRC Press, 2023. http://dx.doi.org/10.1201/9781003358152-7.

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4

Islam, Mohammad Tariqul, and Touhidul Alam. "Lower UHF Metamaterial Antenna for Nanosatellite Communication System." In Metamaterial for Microwave Applications, 263–78. Boca Raton: CRC Press, 2023. http://dx.doi.org/10.1201/9781003358152-9.

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5

Kiang, Jean-Fu, and Chun-Wei Wu. "Introduction to Smart Antenna Systems." In Novel Technologies for Microwave and Millimeter — Wave Applications, 393–410. Boston, MA: Springer US, 2004. http://dx.doi.org/10.1007/978-1-4757-4156-8_18.

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6

Wang, Lulu, and Sachin Kumar. "Compact Ultra-Wideband Antenna for Microwave Imaging Applications." In Computational and Experimental Simulations in Engineering, 211–17. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-02097-1_16.

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7

Sharma, Pankaj, Vineet Sharma, Nikhil Thakur, Pawan Kumar, and Ashok Kumar. "Ferrite Materials for Microwave and High Frequency Antenna Applications." In Engineering Materials, 107–15. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-7454-9_6.

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8

Chang, Chia-Chan, Cheng Liang, and Neville C. Luhmann. "Phased Antenna Array Based on Nonlinear Delay Line Technology." In Novel Technologies for Microwave and Millimeter — Wave Applications, 347–68. Boston, MA: Springer US, 2004. http://dx.doi.org/10.1007/978-1-4757-4156-8_16.

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9

Reddy, Ambavaram Pratap, and Pachiyaannan Muthusamy. "Gain and Bandwidth Enhancement of Pentagon Shaped Dual Layer Parasitic Microstrip Patch Antenna for WLAN Applications." In Smart Antennas, Electromagnetic Interference and Microwave Antennas for Wireless Communications, 163–74. New York: River Publishers, 2022. http://dx.doi.org/10.1201/9781003373230-12.

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10

Ullrich, Christoph, and Peter Russer. "A Hybrid MoM/UTD Method for the Analysis of a Monopole Antenna in an Aperture." In Electromagnetics and Network Theory and their Microwave Technology Applications, 3–20. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-18375-1_1.

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Тези доповідей конференцій з теми "Antenna applications- Microwave"

1

Baca, Loretta J., and John G. McInerney. "A High-speed Microwave Antenna Suitable for Optoelectronic Integration." In OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1990. http://dx.doi.org/10.1364/oam.1990.fnn5.

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Broadband antenna arrays are essential for applications such as radar, frequency-agile microwave communication and electronic counter-measures. Optical feeding of the individual elements of such arrays is promising for beam steering, remote positioning of the antenna with respect to the signal source or receiver, and for high-frequency operation where the inter-element spacing becomes too small for individual waveguide feeds. In this paper we describe the design, fabrication and evaluation of a compact broadband antenna on semi-insulating GaAs or similar material, which lends itself readily to array formation, and which is readily integrable with high-speed electronic and optoelectronic components for optical feeding and phase-shifting. Our design methodology has used the effective index method commonly used in optical waveguide analysis, in place of the more conventional but cumbersome method of moments. This simplification is justified by the strong confinement of the fields within the high-permittivity substrate. A slot-line antenna with a four-section Chebyshev quarter-wave impedance transformer and Marchand balun was designed and fabricated on Duroid 6010, a material chosen for its similar dielectric properties to semi-insulating GaAs. By measuring the SWR using a microwave network analyzer and sweep oscillator, and by using the antenna in receiving mode on an anechoic test range, we have demonstrated successful performance with at least 10 dB directional gain in the designed range 16-18 GHz. Possible applications of single- and multiple-element antennas of this type in hybrid optical/microwave systems will be discussed.
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2

Chung, Kwok L. "Microwave antenna applications of metasurfaces." In 2015 International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM). IEEE, 2015. http://dx.doi.org/10.1109/iwem.2015.7365092.

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3

Deepu., V., S. Mridula, R. Sujith, and P. Mohanan. "Compact uniplanar antenna for multiband applications." In 2008 International Conference on Recent Advances in Microwave Theory and Applications (MICROWAVE). IEEE, 2008. http://dx.doi.org/10.1109/amta.2008.4763166.

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4

Weisgerber, Lars, and Alexander E. Popugaev. "Multibeam antenna array for RFID applications." In 2013 European Microwave Conference (EuMC). IEEE, 2013. http://dx.doi.org/10.23919/eumc.2013.6686596.

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5

Wang, Lulu, Ahmed Al-Jumaily, and Ray Simpkin. "Antenna Array Configuration in Holographic Microwave Imaging." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-36556.

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Biomedical imaging has played an important role in identifying and monitoring the effectiveness of the current state of the art treatments for many diseases. We recently proposed a novel holographic microwave imaging array (HMIA) technique for lesion detection. One of the most important considerations of this technique is the antenna array configuration. This paper demonstrates investigation of using various antenna array configurations to generate a high-resolution microwave image by using the HMIA technique. Both simulation and experimental results are obtained and compared using spiral, random and regularly spaced array configurations to fully demonstrate the effectiveness of antenna arrays to the HMIA technique. The results show that the proposed spiral and random array configurations have the ability to produce high-resolution images at significantly lower cost compared to regularly spaced array. The potential biomedical imaging applications of the research findings would be breast cancer detection and/or brain stroke detection.
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6

Gaber, Shaymaa M., and Noha A. Al-Shalaby. "A Frequency Reconfigurable Antenna for Microwave Applications." In 2018 International Japan-Africa Conference on Electronics, Communications and Computations (JAC-ECC). IEEE, 2018. http://dx.doi.org/10.1109/jec-ecc.2018.8679557.

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7

Tran, Hung, Tuan Tang, G. R. Branner, B. Preetham Kumar, and Sharmistha Modak. "Broadband Conformal Antenna Array for Microwave Applications." In 2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting. IEEE, 2020. http://dx.doi.org/10.1109/ieeeconf35879.2020.9330263.

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8

Isik, Omer, Erdal Korkmaz, and Bahattin Turetken. "Antenna arrangement considerations for microwave hyperthermia applications." In 2011 XXXth URSI General Assembly and Scientific Symposium. IEEE, 2011. http://dx.doi.org/10.1109/ursigass.2011.6051378.

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9

George, S., S. Raman, P. Mohanan, and M. T. Sebastian. "Polymer ceramic composites for microwave substrate and antenna applications." In 2010 Indian Antenna Week "A Workshop on Advanced Antenna Technology". IEEE, 2010. http://dx.doi.org/10.1109/aat.2010.5545948.

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10

Sanz-Izquierdo, B., F. Huang, J. C. Batchelor, and M. Sobhy. "Compact Antenna for WLAN on body applications." In 2006 European Microwave Conference. IEEE, 2006. http://dx.doi.org/10.1109/eumc.2006.281044.

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