Bandwidth enhancement of microstrip dipole using proximity coupling method
03 Jul 2011-pp 1758-1761
TL;DR: A design of proximity coupled microstrip dipole antenna with enhanced bandwidth and gain is presented in this paper and dual-frequency operation using proximity coupled Microstrip Dipole antenna is implemented with good bandwidth at both the frequencies.
Abstract: A design of proximity coupled microstrip dipole antenna with enhanced bandwidth and gain is presented in this paper. Comparative study with coaxial fed design has been done. Also dual-frequency operation using proximity coupled microstrip dipole antenna is implemented with good bandwidth at both the frequencies.
Citations
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01 Jun 2016
TL;DR: The Half-Mode Substrate Integrated Waveguide (HMSIW) fed dual frequency microstrip patch antenna has been presented and is excited to generate dominant TE10HM mode.
Abstract: In this paper, the design of Half-Mode Substrate Integrated Waveguide (HMSIW) fed dual frequency microstrip patch antenna has been presented. The proposed antenna is designed using two microstrip patches such that it resonates at two frequencies 9.95 GHz and 11.35 GHz which are used for X-band applications. The HMSIW is excited to generate dominant TE 10 HM mode. Two patches are used as a radiating elements fed by the open end of HMSIW. The bandwidth at 9.95 GHz is 320 MHz (3.22%) with the return loss of −20 dB and the bandwidth at 11.35 GHz is 580 MHz (5.16%) with the return loss of −30 dB have been achieved.
5 citations
Cites background from "Bandwidth enhancement of microstrip..."
...Simple microstrip patch antennas with microstrip line feeding have the advantages of low profile, less weight and are used for lower frequencies in the range of 1GHz-5GHz for the purpose of GPS, RFID applications [1]....
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References
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TL;DR: In this article, the authors proposed broadband impedance matching as a natural way to increase the bandwidth of conventional microstrip patch antennas and found that by using an optimally designed impedance-matching network, the bandwidth can be increased by a factor of at least 3.9, the exact value depending on the degree of matching required.
Abstract: The nature of the inherent narrow bandwidth of conventional microstrip patch antennas is considered. It is observed that, except for single-feed circularly polarized elements, their bandwidth is limited only by the resonant behavior of the input impedance and not by radiation pattern or gain variations, which usually are negligible over a moderate 10 to 20% bandwidth. Therefore, broadband impedance matching is proposed as a natural to increase the bandwidth. The maximum obtainable bandwidth is calculated using Fano's broadband matching theory. It is found that by using an optimally designed impedance-matching network, the bandwidth can be increased by a factor of at least 3.9, the exact value depending on the degree of matching required. A transmission-line prototype for a proper matching network is developed. The translation of this prototype network into a practical structure (e.g. a microstrip or stripline circuit) is considered. Practical design examples and experimental results which clearly show the validity of the technique are given. >
388 citations
"Bandwidth enhancement of microstrip..." refers methods in this paper
...Other methods have included the use of parasitic elements to obtain a double resonance response [2] or the use of a matching network [3] to obtain improved bandwidth from a patch on a thick substrate....
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TL;DR: In this paper, the electromagnetic properties of rectangular microstrip antennas were investigated experimentally, and the bandwidth was calculated as a function of electrical thickness and the antenna radiation patterns were measured.
Abstract: The electromagnetic properties of electrically thick rectangular microstrip antennas were investigated experimentally. Antennas were fabricated with different patch sizes and with electrical thicknesses ranging from 0.03 to 0.23 wavelengths in the dielectric substrate. The resonant frequencies were measured and compared to existing formulas. The bandwidth was calculated as a function of electrical thickness and the antenna radiation patterns were measured.
347 citations
"Bandwidth enhancement of microstrip..." refers methods in this paper
...The most straightforward way of doing this is to use a thicker substrate, but it is difficult to achieve more than about 4-5% bandwidth in this manner before the impedance locus becomes very inductive, causing matching problems [1]....
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TL;DR: In this article, a microstrip feedline on a substrate proximity-coupled to a rectangular microstrip patch on a covering superstrate is constructed, and a small open-circuit tuning stub is connected in shunt with the feed line.
Abstract: The letter presents experimental results for a proximity-coupled microstrip patch antenna capable of 13% bandwidth. The impedance match (VSWR ≤ 2), copolarised radiation patterns and crosspolarised radiation were measured over this bandwidth to confirm operation. The construction is quite simple, consisting of a microstrip feedline on a substrate proximity-coupled to a rectangular microstrip patch on a covering superstrate; a small open-circuit tuning stub is connected in shunt with the feed line.
301 citations
TL;DR: In this paper, a method for increasing the bandwidth of microstrip patch antennas by incorporating two additional resonators which are gap-coupled to the radiating edges of a rectangular patch is described.
Abstract: A method for increasing the bandwidth of microstrip patch antennas by incorporating two additional resonators which are gap-coupled to the radiating edges of a rectangular patch is described. A two-dimensional analysis using Green's function and segmentation method is used for analyzing the proposed antenna configurations. A bandwidth as large as five times a single rectangular patch is obtained in S -band. Changes in the radiation pattern over this wide bandwidth are discussed. Experimental results are in reasonable agreement with the analysis.
280 citations
"Bandwidth enhancement of microstrip..." refers methods in this paper
...Other methods have included the use of parasitic elements to obtain a double resonance response [2] or the use of a matching network [3] to obtain improved bandwidth from a patch on a thick substrate....
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TL;DR: In this paper, a new class of printed circuit radiator consisting of a microstrip dipole electromagnetically coupled to the microstrip feed line is described, and several configurations which differ in bandwidth, efficiency, and construction simplicity are presented.
Abstract: A new class of printed circuit radiator consisting of a microstrip dipole electromagnetically coupled to a microstrip feed line is described. Several configurations which differ in bandwidth, efficiency, and construction simplicity are presented. A geometry which has been found to be optimum for many applications is noted. Radiation characteristics of both isolated elements and arrays of elements are examined. Experimental and theoretical results are presented.
118 citations
"Bandwidth enhancement of microstrip..." refers background in this paper
...Application of electromagnetically coupled (EMC) microstrip dipole antennas for many potential applications in centimeter- and millimeter-wave communications systems were investigated by Oltman and others [5,6,7]....
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