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Статті в журналах з теми "Ultrawideband planar antennas"

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Автор: Grafiati

Опубліковано: 30 травня 2022

Оновлено: 31 травня 2022

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1

Alibakhshi Kenari, Mohammad. "Design and Modeling of New UWB Metamaterial Planar Cavity Antennas with Shrinking of the Physical Size for Modern Transceivers." International Journal of Antennas and Propagation 2013 (2013): 1–12. http://dx.doi.org/10.1155/2013/562538.

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A variety of antennas have been engineered with MTMs and MTM-inspired constructs to improve their performance characteristics. This report describes the theory of MTMs and its utilization for antenna's techniques. The design and modeling of two MTM structures withε-μconstitutive parameters for patch antennas are presented. The framework presents two novel ultrawideband (UWB) shrinking patch antennas filled with composite right-/left-handed transmission line (CRLH-TL) structures. The CRLH-TL is presented as a general TL possessing both left-handed (LH) and right-handed (RH) natures. The CRLH-TL structures enhance left-handed (LH) characteristics which enable size reduction and large frequency bandwidth. The large frequency bandwidth and good radiation properties can be obtained by adjusting the dimensions of the patches and CRLH-TL structures. This contribution demonstrates the possibility of reducing the size of planar antennas by using LH-transmission lines. Two different types of radiators are investigated—a planar patch antenna composed of fourO-formed unit cells and a planar patch antenna composed of sixO-shaped unit cells. A CRLH-TL model is employed to design and compare these two approaches and their realization with a varying number ofL-Cloaded unit cells. Two representative antenna configurations have been selected and subsequently optimized with full-wave electromagnetic analysis. Return loss and radiation pattern simulations of these antennas prove the developed concept.

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2

Pavithra, P., A. Sriram, and K. Kalimuthu. "Compact planar ultrawideband MIMO antenna for wireless applications." International Journal of Advances in Applied Sciences 8, no. 3 (September 1, 2019): 243. http://dx.doi.org/10.11591/ijaas.v8.i3.pp243-250.

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<p>A compact microstrip fed printed monopole MIMO antenna with ultrawideband (UWB) frequency response (S11< -10 dB for 3.1-10.6 GHz) is proposed in this paper. The proposed antenna is miniaturized and has a high isolation of > 23 dB between the ports compared to the existing UWB multiinput multi output (MIMO) antennas in the literature. The proposed antenna is built on FR4 substrate with thickness of 1.6 mm using all-digital single chip architecture and it is planar in geometry to be easily integrated with the other electronic components in the printed circuit board (PCB). The UWBMIMO antenna is analyzed using simulation and measurements and its performance is investigated. The antenna is extremely useful for low power short range communications and it provides high multipath immunity due to diversity.</p>

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3

Ling, Ching-Wei, Wen-Hsin Lo, Ran-Hong Yan, and Shyh-Jong Chung. "Planar Binomial Curved Monopole Antennas for Ultrawideband Communication." IEEE Transactions on Antennas and Propagation 55, no. 9 (September 2007): 2622–24. http://dx.doi.org/10.1109/tap.2007.904140.

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4

Tang, Ming-Chun, Ting Shi, and Richard W. Ziolkowski. "Planar Ultrawideband Antennas With Improved Realized Gain Performance." IEEE Transactions on Antennas and Propagation 64, no. 1 (January 2016): 61–69. http://dx.doi.org/10.1109/tap.2015.2503732.

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5

Das, Swarup, Debasis Mitra, and Sekhar Ranjan Bhadra Chaudhuri. "Design of UWB Planar Monopole Antennas with Etched Spiral Slot on the Patch for Multiple Band-Notched Characteristics." International Journal of Microwave Science and Technology 2015 (October 20, 2015): 1–9. http://dx.doi.org/10.1155/2015/303215.

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Three types of Ultrawideband (UWB) antennas with single, double, and triple notched bands are proposed and investigated for UWB communication applications. The proposed antennas consist of CPW fed monopole with spiral slot etched on the patch. In this paper single, double, and also triple band notches with central frequency of 3.57, 5.12, and 8.21 GHz have been generated by varying the length of a single spiral slot. The proposed antenna is low-profile and of compact size. A stable gain is obtained throughout the operation band except the three notched frequencies. The antennas have omnidirectional and stable radiation patterns across all the relevant bands. Moreover, relatively consistent group delays across the UWB frequencies are noticed for the triple notched band antenna. A prototype of the UWB antenna with triple notched bands is fabricated and the measured results of the antenna are compared with the simulated results.

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6

Cicchetti, Renato, Emanuela Miozzi, and Orlandino Testa. "Wideband and UWB Antennas for Wireless Applications: A Comprehensive Review." International Journal of Antennas and Propagation 2017 (2017): 1–45. http://dx.doi.org/10.1155/2017/2390808.

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Анотація:

A comprehensive review concerning the geometry, the manufacturing technologies, the materials, and the numerical techniques, adopted for the analysis and design of wideband and ultrawideband (UWB) antennas for wireless applications, is presented. Planar, printed, dielectric, and wearable antennas, achievable on laminate (rigid and flexible), and textile dielectric substrates are taken into account. The performances of small, low-profile, and dielectric resonator antennas are illustrated paying particular attention to the application areas concerning portable devices (mobile phones, tablets, glasses, laptops, wearable computers, etc.) and radio base stations. This information provides a guidance to the selection of the different antenna geometries in terms of bandwidth, gain, field polarization, time-domain response, dimensions, and materials useful for their realization and integration in modern communication systems.

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7

Pepe, Domenico, Luigi Vallozzi, Hendrik Rogier, and Domenico Zito. "Design Variations on Planar Differential Antenna with Potential for Multiple, Wide, and Narrow Band Coverage." International Journal of Antennas and Propagation 2015 (2015): 1–13. http://dx.doi.org/10.1155/2015/478453.

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This paper presents three practical antenna implementations based on variations of one general planar differential antenna topology originally proposed for ultrawideband (UWB) applications. All designs were implemented on a low-cost FR4 substrate and experimentally characterized in an anechoic chamber. The results show how the proposed design variations lead to the required antenna performances and how they give rise to new opportunities in terms of coverage of wide, narrow, and multiple frequency bands for communication and sensing applications below 5 GHz. In particular, the results show how a significant enhancement in bandwidth performance is achieved by folding the differential radiating elements. Moreover, they show how an agile design strategy enables adaption of the antenna design to different requirements for covering wide, narrow, and multiple bands, making the proposed class of antennas suitable for different wireless applications. In detail, the proposed class of antennas covers multiple frequency bands, ranging from the 868 MHz and 915 MHz bands to 2.4 GHz industrial scientific and medical (ISM) bands, including the 1.2 GHz L band for Global Positioning and Navigation Satellite Systems (GNSS) and the lower portion of the UWB band.

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8

Khurshid, Adnan, Jian Dong, and Ronghua Shi. "A Metamaterial-Based Compact Planar Monopole Antenna for Wi-Fi and UWB Applications." Sensors 19, no. 24 (December 9, 2019): 5426. http://dx.doi.org/10.3390/s19245426.

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Анотація:

Ultrawideband (UWB) antennas are widely used as core devices in high-speed wireless communication. A novel compact UWB monopole antenna with an additional narrow band for Wi-Fi applications comprising a metamaterial (MTM) is proposed in this paper. The antenna has a compact size of 27 × 33 mm2 and consists of a V-shaped slot with two rectangular slots in the radiation patch. The inductance and capacitance develop due to the V-shaped slot in the radiation patch. The proposed antenna has −10 dB bandwidths of 3.2 GHz to 14 GHz for UWB and 2.38 GHz to 2.57 GHz for narrowband, corresponding to 144% and 7.66% fractional bandwidths, respectively. The measured gain and efficiency meet the desired values for UWB and Wi-Fi applications. To verify the performance of the antenna, the proposed antenna is fabricated and tested. The simulated and measured results agree well at UWB frequencies and Wi-Fi frequencies, and the antenna can be used as a smart device for portable IoT applications.

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9

Syed, Avez, and Rabah W. Aldhaheri. "A Very Compact and Low Profile UWB Planar Antenna with WLAN Band Rejection." Scientific World Journal 2016 (2016): 1–7. http://dx.doi.org/10.1155/2016/3560938.

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Анотація:

A low-cost coplanar waveguide fed compact ultrawideband (UWB) antenna with band rejection characteristics for wireless local area network (WLAN) is proposed. The notch band characteristic is achieved by etching half wavelength C-shaped annular ring slot in the radiating patch. By properly choosing the radius and position of the slot, the notch band can be adjusted and controlled. With an overall size of 18.7 mm × 17.6 mm, the antenna turns out to be one of the smallest UWB antennas with band-notched characteristics. It has a wide fractional bandwidth of 130% (2.9–13.7 GHz) with VSWR < 2 and rejecting IEEE 802.11a and HIPERLAN/2 frequency band of 5.1–5.9 GHz. Stable omnidirectional radiation patterns in theHplane with an average gain of 4.4 dBi are obtained. The band-notch mechanism of the proposed antenna is examined by HFSS simulator. A good agreement is found between measured and simulated results indicating that the proposed antenna is well suited for integration into portable devices for UWB applications.

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10

Kumari, Sakshi, and Vibha Rani Gupta. "Super Ultrawideband Planar Inverted F Antenna on Paper based Substrate with Low SAR." ECTI Transactions on Electrical Engineering, Electronics, and Communications 17, no. 2 (August 31, 2019): 204–13. http://dx.doi.org/10.37936/ecti-eec.2019172.225337.

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In this paper, a super ultrawide band planar inverted F antenna (PIFA) has been proposed for wearable applications on a low cost, ecofriendly paper-based substrate. This work is a first and important step towards the progression of conformal flexible antennas for a body area network. The proposed antenna has measured impedance bandwidth of 10.6 GHz, which covers almost all the bands of a wireless body area network i.e. GSM (880-960 MHz), GPS (1565-1585 MHz), DCS (1710-1880 MHz), PCS (1850-1990 MHz), UMTS (1920-2170 MHz), ISM (2.4-2.4835 GHz), WiMAX (3.3-3.8 GHz), HIPERLAN (5.15-5.35 GHz), WLAN (5.725-5.850 GHz) and UWB (3.1-10.6 GHz). Initially, the electrical characteristics of paper are extracted using Cavity Resonator and Transmission line method and then used for the design and fabrication of the proposed antenna. The measured results are in good agreement with the simulated results. This paper also focuses on analysis of the effect of electromagnetic absorption in terms of specific absorption rate for a human arm with frequency exposure at 0.9 GHz, 1.5 GHz, 1.8 GHz, 3.5 GHz, 2.45 GHz, 5.2 GHz and 5.8 GHz and is found to be within the recommended limit by FCC.

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11

Abbosh, Amin M., and Marek E. Bialkowski. "Design of Ultrawideband Planar Monopole Antennas of Circular and Elliptical Shape." IEEE Transactions on Antennas and Propagation 56, no. 1 (January 2008): 17–23. http://dx.doi.org/10.1109/tap.2007.912946.

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12

Tang, Ming-Chun, Hao Wang, Tianwei Deng, and Richard W. Ziolkowski. "Compact Planar Ultrawideband Antennas With Continuously Tunable, Independent Band-Notched Filters." IEEE Transactions on Antennas and Propagation 64, no. 8 (August 2016): 3292–301. http://dx.doi.org/10.1109/tap.2016.2570254.

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13

Kim, Joon Il, and Yong Jee. "Design of Ultrawideband Coplanar Waveguide-Fed LI-Shape Planar Monopole Antennas." IEEE Antennas and Wireless Propagation Letters 6 (2007): 383–87. http://dx.doi.org/10.1109/lawp.2007.903495.

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14

Adamiuk, Grzegorz, Mario Pauli, and Thomas Zwick. "Principle for the Realization of Dual-Orthogonal Linearly Polarized Antennas for UWB Technique." International Journal of Antennas and Propagation 2011 (2011): 1–11. http://dx.doi.org/10.1155/2011/231893.

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Анотація:

A concept of an array configuration for an ultrawideband suppression of the cross-polarization is presented. The method is explained in detail, and a mathematical description of the principle is given. It is shown that the presented configuration is convenient for the development of very broad band, dual-orthogonal, linearly polarized antennas with high polarization purity. The investigated configuration shows a high decoupling of the orthogonal ports and is capable for antennas with a main beam direction perpendicular to the substrate surface, that is, for a planar design. The phase center of the antenna configuration remains fixed at one single point over the complete desired frequency range, allowing a minimum dispersion of the radiated signal. The influence of nonidealities in the feeding network on the polarization purity is investigated. The presented method introduces a superior possibility of an extension of typical UWB technique to fully polarized systems, which improves significantly performance in, for example, UWB-MIMO or UWB-Radar.

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15

Anumuthu, Priya, Kaja Sultan, Manavalan Saravanan, Mohd Ali, Manikandan Venkatesh, Mohammad Saleem, and Imaduddeen Nizamuddeen. "Design of Frequency Reconfigurable Patch Antenna for Sensing and Tracking Communications." Applied Computational Electromagnetics Society 35, no. 12 (February 15, 2021): 1532–38. http://dx.doi.org/10.47037/2020.aces.j.351212.

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This paper presents a front-end structure of a reconfigurable patch antenna for cognitive radio systems. The antenna structure consists of an Ultrawideband (UWB) sensing antenna and an array of frequency reconfigurable antennas incorporated on the same substrate. The UWB and reconfigurable antennas are fed by co-planar waveguides (CPW). The reconfigurability is achieved by rotating the series of patch antennas through a certain angle and the rotation is controlled by mechanical means using an Arduino microcontroller. The rotational reconfigurability has been preferred over MEMS switches, PIN diodes, and other lumped elements because the latter requires the need for bias lines. The entire structure is designed using High Frequency Structure Simulator (HFSS) software and the prototype is fabricated over FR-4 substrate having a thickness of 1.6mm and measurements are carried out. This antenna achieves a wideband frequency from 2 GHz to 12 GHz and distinct narrow band of frequencies by reconfigurability using single antenna consisting of different shapes spaced accurately to ensure isolation between adjacent frequency bands and each antenna element working for a bandwidth of 2 GHz for frequency from 2 GHz to 12 GHz upon a single substrate and the reconfigurable elements are controlled using a low cost Arduino microcontroller connected directly to the antenna which ensures accurate controlling of the rotation and fast switching between the antenna elements. The measured results agree with the simulated results and have less than 10 dB impedance bandwidth.

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16

Yuan Dan Dong, Wei Hong, Zhen Qi Kuai, and Ji Xin Chen. "Analysis of Planar Ultrawideband Antennas With On-Ground Slot Band-Notched Structures." IEEE Transactions on Antennas and Propagation 57, no. 7 (July 2009): 1886–93. http://dx.doi.org/10.1109/tap.2009.2021910.

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17

Balzovsky, E. V., Y. I. Buyanov, and V. I. Koshelev. "Ultrawideband antenna arrays based on planar combined antennas for the frequency range of 3.1-10.6 GHz." Journal of Physics: Conference Series 1843, no. 1 (March 1, 2021): 012003. http://dx.doi.org/10.1088/1742-6596/1843/1/012003.

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18

Mohammed, Beada'a J., Amin M. Abbosh, and Philip Sharpe. "Planar array of corrugated tapered slot antennas for ultrawideband biomedical microwave imaging system." International Journal of RF and Microwave Computer-Aided Engineering 23, no. 1 (May 10, 2012): 59–66. http://dx.doi.org/10.1002/mmce.20651.

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19

Dong, Jian, Qianqian Li, and Lianwen Deng. "Compact Planar Ultrawideband Antennas with 3.5/5.2/5.8 GHz Triple Band-Notched Characteristics for Internet of Things Applications." Sensors 17, no. 2 (February 10, 2017): 349. http://dx.doi.org/10.3390/s17020349.

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20

Zhang, Yan, Wei Hong, Chen Yu, Zhen-Qi Kuai, Yu-Dan Don, and Jian-Yi Zhou. "Planar Ultrawideband Antennas With Multiple Notched Bands Based on Etched Slots on the Patch and/or Split Ring Resonators on the Feed Line." IEEE Transactions on Antennas and Propagation 56, no. 9 (September 2008): 3063–68. http://dx.doi.org/10.1109/tap.2008.928815.

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21

Draskovic, Drasko, Jean Raphaël Olivier Fernandez, and César Briso Rodríguez. "Planar Ultrawideband Antenna with Photonically Controlled Notched Bands." International Journal of Antennas and Propagation 2013 (2013): 1–6. http://dx.doi.org/10.1155/2013/924768.

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Анотація:

A design of a planar microstrip-fed ultrawideband (UWB) printed circular monopole antenna with optically controlled notched bands is presented. The proposed antenna is composed of a circular ultrawideband patch, with an etched T-shaped slot controlled by an integrated silicon switch. The slot modifies the frequency response of the antenna suppressing 3.5–5 GHz band when the switch is in open state. The optical switch is controlled by a low-power near-infrared (808 nm) laser diode, which causes the change in the frequency response of the antenna generating a frequency notch. This solution could be expanded to include several notches in the antenna frequency response achieving a fully reconfigurable UWB antenna. The antenna could be remotely controlled at large distances using optical fiber. The prototype antenna has been fully characterized to verify these design concepts.

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22

Tseng, Ching-Fang, and Cheng-Liang Huang. "Ultrawideband planar microstrip-fed monopole antenna." Microwave and Optical Technology Letters 49, no. 1 (2006): 183–85. http://dx.doi.org/10.1002/mop.22069.

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23

Jung, Pil Hyun, Jeong Seok Kwak, Ha Eun Lee, and Woon Geun Yang. "Ultrawideband-embedded multiband planar monopole antenna." Microwave and Optical Technology Letters 56, no. 5 (March 11, 2014): 1111–15. http://dx.doi.org/10.1002/mop.28283.

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24

Takemoto, Erika, and Akira Hirose. "Propeller-Shaped Antenna: A Steerable Ultrawideband Planar Antenna." IEEE Antennas and Wireless Propagation Letters 13 (2014): 1140–43. http://dx.doi.org/10.1109/lawp.2014.2330602.

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25

Ma, Zhong-Hua, Jia-Xiang Chen, Peng Chen, and Yan Feng Jiang. "Design of Planar Microstrip Ultrawideband Circularly Polarized Antenna Loaded by Annular-Ring Slot." International Journal of Antennas and Propagation 2021 (March 17, 2021): 1–10. http://dx.doi.org/10.1155/2021/6638096.

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Анотація:

A miniaturized planar microstrip circularly polarized ultrawideband (UWB) antenna loaded by annular-ring slot is proposed and implemented in the paper. With the annular-ring slot loaded in the radiating patch of the antenna, the side of the radiating patch is connected by the asymmetric inverted L-shaped microstrip. At the same time, a quarter of a circle is cut off from the radiating patch. The above designed structure shows improvements on the operating frequency band and realization of the circular polarization radiation. A tapered microstrip is placed between the feed line and the radiating patch to achieve the slow-changing impedance transformation. The results of simulation and measurement demonstrate that the 3 dB axial ratio (AR) fractional bandwidth of the antenna structure achieves 21.25%. The peak gain within the 3 dB axial ratio bandwidth fluctuates between 3.74 and 4.59 dBi. The antenna shows good impedance matching in the ultrawideband range. With the compact structure of the UWB antenna, it has potential application in various wireless communication devices.

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26

Preradovic, Stevan. "Novel Dual-Polarized Planar Ultrawideband Monopole Antenna." IEEE Antennas and Wireless Propagation Letters 13 (2014): 856–59. http://dx.doi.org/10.1109/lawp.2014.2320891.

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27

Locatelli, Andrea, Daniele Modotto, Filippo Maria Pigozzo, Stefano Boscolo, Costantino De Angelis, Antonio-Daniele Capobianco, and Michele Midrio. "A Planar, Differential, and Directive Ultrawideband Antenna." IEEE Transactions on Antennas and Propagation 58, no. 7 (July 2010): 2439–42. http://dx.doi.org/10.1109/tap.2010.2048870.

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28

Holland, Steven S., and Marinos N. Vouvakis. "The Planar Ultrawideband Modular Antenna (PUMA) Array." IEEE Transactions on Antennas and Propagation 60, no. 1 (January 2012): 130–40. http://dx.doi.org/10.1109/tap.2011.2167916.

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29

Abbosh, A. M. "Miniaturization of Planar Ultrawideband Antenna via Corrugation." IEEE Antennas and Wireless Propagation Letters 7 (2008): 685–88. http://dx.doi.org/10.1109/lawp.2008.2009323.

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30

Hossain, Amran, Mohammad Tariqul Islam, Md Tarikul Islam, Muhammad E. H. Chowdhury, Hatem Rmili, and Md Samsuzzaman. "A Planar Ultrawideband Patch Antenna Array for Microwave Breast Tumor Detection." Materials 13, no. 21 (November 2, 2020): 4918. http://dx.doi.org/10.3390/ma13214918.

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Анотація:

In this paper, a compact planar ultrawideband (UWB) antenna and an antenna array setup for microwave breast imaging are presented. The proposed antenna is constructed with a slotted semicircular-shaped patch and partial trapezoidal ground. It is compact in dimension: 0.30λ × 0.31λ × 0.011λ, where λ is the wavelength of the lowest operating frequency. For design purposes, several parameters are assumed and optimized to achieve better performance. The prototype is applied in the breast imaging scheme over the UWB frequency range 3.10–10.60 GHz. However, the antenna achieves an operating bandwidth of 8.70 GHz (2.30–11.00 GHz) for the reflection coefficient under–10 dB with decent impedance matching, 5.80 dBi of maximum gain with steady radiation pattern. The antenna provides a fidelity factor (FF) of 82% and 81% for face-to-face and side-by-side setups, respectively, which specifies the directionality and minor variation of the received pulses. The antenna is fabricated and measured to evaluate the antenna characteristics. A 16-antenna array-based configuration is considered to measure the backscattering signal of the breast phantom where one antenna acts as transmitter, and 15 of them receive the scattered signals. The data is taken in both the configuration of the phantom with and without the tumor inside. Later, the Iteratively Corrected Delay and Sum (IC–DAS) image reconstructed algorithm was used to identify the tumor in the breast phantom. Finally, the reconstructed images from the analysis and processing of the backscattering signal by the algorithm are illustrated to verify the imaging performance.

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31

Liu, Haixia, Fei Wang, Yang Yang, Xiaowei Shi, and Long Li. "A Novel Ultrawideband Planar Inverted-F Antenna with Capacitive Ground Plane." International Journal of Antennas and Propagation 2013 (2013): 1–6. http://dx.doi.org/10.1155/2013/282373.

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Анотація:

With the trend of the miniaturization, broadband, and integration of multisystems of wireless communication terminals, a new ultrawideband planar inverted-F antenna (PIFA) with capacitive ground plane is proposed in this paper. The capacitive ground plane is composed of a sheet of metal islands, which makes a major contribution to ultra-wideband from 2.3 GHz to 9.0 GHz by applying the capacitive compensation for input impedance of the PIFA in high-order modes frequency bands. The effect of geometric parameters of capacitive ground plane and antenna height on antenna performance is analyzed. It is found that the radiation pattern in free space and the gain of the proposed antenna also meet the demands of the wireless communication terminals. The reported antenna was fabricated and measured, and the experimental results are in good agreement with the simulation results.

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32

Qu, Shi-Wei, Cheng-Li Ruan, and Quan Xue. "A Planar Folded Ultrawideband Antenna With Gap-Loading." IEEE Transactions on Antennas and Propagation 55, no. 1 (January 2007): 216–20. http://dx.doi.org/10.1109/tap.2006.888465.

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33

Mondal, Santanu, and Partha Pratim Sarkar. "Design of an ultrawideband planar circular metal antenna." Microwave and Optical Technology Letters 57, no. 8 (May 28, 2015): 1925–28. http://dx.doi.org/10.1002/mop.29217.

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34

Mei Sun, Yue Ping Zhang, and Yilong Lu. "Miniaturization of Planar Monopole Antenna for Ultrawideband Radios." IEEE Transactions on Antennas and Propagation 58, no. 7 (July 2010): 2420–25. http://dx.doi.org/10.1109/tap.2010.2048851.

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35

Zito, Giuseppe A., Enrico M. Staderini, and Stefano Pisa. "A Twin Spiral Planar Antenna for UWB Medical Radars." International Journal of Antennas and Propagation 2013 (2013): 1–6. http://dx.doi.org/10.1155/2013/684185.

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Анотація:

A planar-spiral antenna to be used in an ultrawideband (UWB) radar system for heart activity monitoring is presented. The antenna, named “twin,” is constituted by two spiral dipoles in a compact structure. The reflection coefficient at the feed point of the dipoles is lower than −8 dB over the 3–12 GHz band, while the two-dipoles coupling is about −20 dB. The radiated beam is perpendicular to the plane of the spiral, so the antenna is wearable and it may be an optimal radiator for a medical UWB radar for heart rate detection. The designed antenna has been also used to check some hypotheses about the UWB radar heart activity detection mechanism. The radiation impedance variation, caused by the thorax vibrations associated with heart activity, seems to be the most likely explanation of the UWB radar operation.

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36

Ellis, Mubarak Sani, Daniel Kotei, Zhiqin Zhao, Zaiping Nie, and Qing Huo Liu. "Planar Monopole Ultrawideband Antenna with Reduced Ground Plane Dependence." International Journal of Computer and Electrical Engineering 6, no. 5 (2014): 393–401. http://dx.doi.org/10.17706/ijcee.2014.v6.858.

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37

Yun, Junsik, and Jaehoon Choi. "Low-Profile Planar Inverted-F Antenna for Ultrawideband Applications." Journal of electromagnetic engineering and science 16, no. 4 (October 31, 2016): 235–40. http://dx.doi.org/10.5515/jkiees.2016.16.4.235.

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38

Venkata, Sai Kiran, Muktikanta Rana, Pritam Singh Bakariya, Santanu Dwari, and Manas Sarkar. "PLANAR ULTRAWIDEBAND MONOPOLE ANTENNA WITH TRI-NOTCH BAND CHARACTERISTICS." Progress In Electromagnetics Research C 46 (2014): 163–70. http://dx.doi.org/10.2528/pierc13122301.

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39

Ahmed, Osama M. H., and Abdel-Razik Sebak. "Planar ultrawideband antenna array for short-range wireless communications." Microwave and Optical Technology Letters 52, no. 5 (March 5, 2010): 1061–66. http://dx.doi.org/10.1002/mop.25140.

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40

Ghosh, S. "Design of Planar Crossed Monopole Antenna for Ultrawideband Communication." IEEE Antennas and Wireless Propagation Letters 10 (2011): 548–51. http://dx.doi.org/10.1109/lawp.2011.2157888.

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41

Jung, Tae-Hwan, Seo-Cheol Jung, Hong-Kyun Ryu, Hyun-Seok Oh, and Jong-Myung Woo. "Ultrawideband Planar Dipole Antenna With a Modified Taegeuk Structure." IEEE Antennas and Wireless Propagation Letters 14 (2015): 194–97. http://dx.doi.org/10.1109/lawp.2014.2359936.

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42

Shi Cheng, P. Hallbjorner, and A. Rydberg. "Printed Slot Planar Inverted Cone Antenna for Ultrawideband Applications." IEEE Antennas and Wireless Propagation Letters 7 (2008): 18–21. http://dx.doi.org/10.1109/lawp.2007.914115.

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43

Moody, Robert A., and Satish K. Sharma. "Ultrawide Bandwidth (UWB) Planar Monopole Antenna Backed by Novel Pyramidal-Shaped Cavity Providing Directional Radiation Patterns." IEEE Antennas and Wireless Propagation Letters 10 (2011): 1469–72. http://dx.doi.org/10.1109/lawp.2011.2179513.

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Анотація:

An ultrawideband (UWB) coplanar waveguide (CPW)-fed pentagon-shaped planar monopole antenna (PMA) backed by a novel pyramidal-shaped cavity is presented that provides directional radiation patterns. The pyramidal-shaped cavity reflector is placed at a fixed spacing from the UWB monopole antenna to provide impedance and radiation performance over 110% (3.1-10.6 GHz) frequency band. The PMA itself on a foam substrate provides stable gain variation within 3 dB over an impedance bandwidth (w.r.t.S11<; -10 dB) of 120% (3-12 GHz). The proposed cavity-backed PMA prototype antenna was fabricated, and experimental verification was performed for impedance matching and radiation patterns. The measured results show reasonable agreement with the simulated ones.

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44

Shakib, M. N., M. Moghavvemi, and W. N. L. Mahadi. "Design of a Compact Tuning Fork-Shaped Notched Ultrawideband Antenna for Wireless Communication Application." Scientific World Journal 2014 (2014): 1–8. http://dx.doi.org/10.1155/2014/874241.

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A new compact planar notched ultrawideband (UWB) antenna is designed for wireless communication application. The proposed antenna has a compact size of0.182λ × 0.228λ × 0.018λwhereλis the wavelength of the lowest operating frequency. The antenna is comprised of rectangular radiating patch, ground plane, and an arc-shaped strip in between radiating patch and feed line. By introducing a new Tuning Fork-shaped notch in the radiating plane, a stopband is obtained. The antenna is tested and measured. The measured result indicated that fabricated antenna has achieved a wide bandwidth of 4.33–13.8 GHz (at −10 dB return loss) with a rejection frequency band of 5.28–6.97 GHz (WiMAX, WLAN, and C-band). The effects of the parameters of the antenna are discussed. The experiment results demonstrate that the proposed antenna can well meet the requirement for the UWB communication in spite of its compactness and small size.

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45

Azim, Rezaul, Mohammad Tariqul Islam, Norbahiah Misran, Baharudin Yatim, and Haslina Arshad. "Design and Realization of a Planar Ultrawideband Antenna with Notch Band at 3.5 GHz." Scientific World Journal 2014 (2014): 1–7. http://dx.doi.org/10.1155/2014/563830.

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Анотація:

A small antenna with single notch band at 3.5 GHz is designed for ultrawideband (UWB) communication applications. The fabricated antenna comprises a radiating monopole element and a perfectly conducting ground plane with a wide slot. To achieve a notch band at 3.5 GHz, a parasitic element has been inserted in the same plane of the substrate along with the radiating patch. Experimental results shows that, by properly adjusting the position of the parasitic element, the designed antenna can achieve an ultrawide operating band of 3.04 to 11 GHz with a notched band operating at 3.31–3.84 GHz. Moreover, the proposed antenna achieved a good gain except at the notched band and exhibits symmetric radiation patterns throughout the operating band. The prototype of the proposed antenna possesses a very compact size and uses simple structures to attain the stop band characteristic with an aim to lessen the interference between UWB and worldwide interoperability for microwave access (WiMAX) band.

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46

Suh, S. Y., W. L. Stutzman, and W. A. Davis. "A New Ultrawideband Printed Monopole Antenna: The Planar Inverted Cone Antenna (PICA)." IEEE Transactions on Antennas and Propagation 52, no. 5 (May 2004): 1361–65. http://dx.doi.org/10.1109/tap.2004.827529.

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47

Li, Xiaoyin, Lianshan Yan, Wei Pan, and Bin Luo. "A Compact Printed Quadruple Band-Notched UWB Antenna." International Journal of Antennas and Propagation 2013 (2013): 1–6. http://dx.doi.org/10.1155/2013/956898.

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A novel compact coplanar waveguide- (CPW-) fed ultrawideband (UWB) printed planar volcano-smoke antenna (PVSA) with four band-notches for various wireless applications is proposed and demonstrated. The low-profile antenna consists of a C-shaped parasitic strip to generate a notched band at 8.01~8.55 GHz for the ITU band, two C-shaped slots, and an inverted U-shaped slot etched in the radiator patch to create three notched bands at 5.15~5.35 GHz, 5.75~5.85 GHz, and 7.25~7.75 GHz for filtering the WLAN and X-band satellite signals. Simulated and measured results both confirm that the proposed antenna has a broad bandwidth of 3.1~12 GHz with VSWR < 2 and good omnidirectional radiation patterns with four notched-bands.

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48

Abdelhalim, Chaabane, and Djahli Farid. "A Compact Planar UWB Antenna with Triple Controllable Band-Notched Characteristics." International Journal of Antennas and Propagation 2014 (2014): 1–10. http://dx.doi.org/10.1155/2014/848062.

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Анотація:

A modified compact planar ultrawideband (UWB) monopole antenna with triple controllable band-notched characteristics is presented in this paper. The proposed antenna consists of a modified stair cased V-shaped radiating element and partial ground plane. The triple band-notched characteristics are achieved by embedding two different vertical up C-shaped slots with a vertical down C-shaped slot in the radiating patch and in the ground plane, respectively. Besides, the bandwidth of each rejected band can be independently controlled by adjusting the dimensions of the corresponding band notched structure. The proposed antenna with rejected bands characteristics is successfully simulated, prototyped, and measured. The measured results show that the antenna operates until upper 11 GHz for voltage standing wave ratio (VSWR) is less than 2, and exhibits bands rejection of 1.6–2.66 GHz (49.76%), 3-4 GHz (28.57%), and 5.13–6.03 GHz (16.12%). Moreover, the proposed antenna shows a near omnidirectional radiation patterns, stable peak gain, and with small group delay and transfer function variation on the whole UWB frequency range except in the notched frequency bands, which makes it suitable for being used in the future UWB applications.

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49

Zhang, Xiaoyan, and Guohao Wang. "A Flexible Monopole Antenna with Dual-Notched Band Function for Ultrawideband Applications." International Journal of Antennas and Propagation 2014 (2014): 1–5. http://dx.doi.org/10.1155/2014/546064.

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Анотація:

We present a flexible ultrawideband (UWB) planar monopole antenna with dual-notched band characteristic printed on a polyimide substrate. The antenna is fed by a step coplanar waveguide (CPW) that provides smooth transitional impedance for improved matching. It operates from 2.76 to 10.6 GHz with return loss greater than 10 dB except for the notch band to reduce the interference with existing 3.5 GHz WiMAX band and 5.5 GHz WLAN band. With a combination of rectangular and circle patches in which the U-shaped slot is carved, the overall size of antenna is 30 mm × 20 mm. Moreover, a pair of arc-shaped stubs located at both sides of the feed line is utilized to create the notch band for WiMAX band. The results also show that the antenna has omnidirectional radiation pattern and smooth gain over the entire operational band.

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50

Kissi, Chaïmaâ, Mariella Särestöniemi, Timo Kumpuniemi, Sami Myllymäki, Marko Sonkki, Mohamed Nabil Srifi, Heli Jantunen, and Carlos Pomalaza-Raez. "Reflector-Backed Antenna for UWB Medical Applications with On-Body Investigations." International Journal of Antennas and Propagation 2019 (October 13, 2019): 1–17. http://dx.doi.org/10.1155/2019/6159176.

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A recent reflector-backed antenna model is proposed in this paper for wireless capsule endoscopy localization. The antenna is designed to operate at the lowest 802.15.6 mandatory UWB (ultrawideband) channel, i.e., 4 GHz center frequency with 500 MHz bandwidth. The antenna achieves a good directivity and radiates well over the frequency band of interest. The proposed antenna was constructed within three successive steps. Initially, a planar omnidirectional antenna was designed of 3.15 dBi gain at 4 GHz. Since the antenna aims to operate as a receiving antenna, good directivity is preferred. Thus, an air-filled cavity was included backing the planar antenna to bolster the directivity toward the radiating element. The cavity-backed antenna has a measured gain of 6.4 dBi. The antenna was evaluated next to the homogenous and multilayer models. Then, the antenna design was optimized, by reducing its size, to a reflector-backed antenna structure reaching a maximum gain of 5.3 dBi, which is still promising for the regarded application. The body effect on the antenna matching was evaluated by means of multilayer and voxel models simulating the human body. This was followed by on-body measurements involving real subject. The depth of in-body propagation, from skin to small intestine, was studied using the multilayer and voxel models. Simulations were run using the CST Microwave Studio tool. While prototyping, free-space and on-body measurements took place at University of Oulu, Finland.

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