Results 161 to 170 of about 567,106 (189)
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Enhanced impedance bandwidth of microstrip antennas using coupling
Microwave and Optical Technology Letters, 2003AbstractThis paper presents measured results for the improved bandwidth of a microstrip antenna using coupling techniques in conjunction with matching circuits. The proposed technique is applied to probe‐fed and aperture‐coupled microstrip antennas.
Byungje Lee +5 more
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A case study to improve the impedance bandwidth of a planar monopole
Microwave and Optical Technology Letters, 2005AbstractThis paper presents a new technique to improve the impedance bandwidth of a rectangular planar monopole. The method involves beveling one part while keeping the other edges near the ground plane, which is connected to the antenna‐feeding port. The measured impedance bandwidth of the monopole can reach a ratio of 14:1 for a voltage standing wave
Jianming Qiu +3 more
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Achieving Wider Impedance Bandwidth Using FullWavelength Dipoles
2020 14th European Conference on Antennas and Propagation (EuCAP), 2020This paper investigates the use of full-wavelength dipoles (FWD) to achieve wider bandwidth than halfwavelength dipoles (HWD). Two dual-polarized antennas are built based on FWDs for base station applications as examples. The first antenna is an isolated cross-dipole employing two FWDs with simple configuration.
Can Ding, Haihan Sun, He Zhu, Y. Jay Guo
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Textile antennas: Effects of antenna bending on input matching and impedance bandwidth
2006 First European Conference on Antennas and Propagation, 2006This paper describes how the performance of wearable textile antennas is affected on the antenna bending. Here, we will focus on the resonance frequency fluctuation and input-match bandwidth variation due to the antenna bending. The results are given for three different antennas, namely, a conventional patch, EBG, and dual-band U-slot antennas.
Pekka Salonen, Yahya Rahmat-Samii
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Bandwidth and quality factor of a small antenna with coupled impedance resonances
2011 24th Canadian Conference on Electrical and Computer Engineering(CCECE), 2011Interrelation of the quality factor, the lower bound on the quality factor (Q lb (ω)), and bandwidth was examined for an electrically small antenna with coupled impedance resonances around its antiresonance. Bands corresponding to the resonances and the total bandwidth of the antenna are limited by values of Q lb −1(ω) calculated at frequencies of ...
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Analysis of the Gap Bandwidth of some High Impedance Surfaces in the Microwave Range
Materials Science Forum, 2010This work numerically explores the relations between the positions and the widths of the frequency bandgaps that occur in some shielded high impedance surfaces and the geometrical dimensions of the structures. The reported parameterized results are useful for design issues and for circuit models conception and validation.
MATEKOVITS, Ladislau, A. DE SABATA
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A monopolar patch antenna with very wide impedance bandwidth
IEEE Transactions on Antennas and Propagation, 2005A monopolar patch antenna that utilizes a bandwidth broadening technique is investigated experimentally and numerically. The proposed antenna consists of a monopole that is formed by connecting four trapezoidal plates orthogonally. A circular patch, which is shorted to the circular ground plane by four shorting wires, is placed at the top of the ...
K.-L. Lau, P. Li, K.-M. Luk
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Antenna using feed structure for wide impedance bandwidth
Microwave and Optical Technology Letters, 2014ABSTRACTIn this article, an antenna composed of radiator and feed structure for enhancement of impedance bandwidth is proposed. By controlling the coupling between the radiator and feed structure with the length of coupled line, it is possible to achieve a wide impedance bandwidth.
Kyoungnam Park +3 more
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Relation between surface impedance and bandwidth of hard surface
Proceedings of IEEE Antennas and Propagation Society International Symposium and URSI National Radio Science Meeting, 2002Shows that the bandwidth of a hard surface is always inversely proportional to the diameter of the guiding structure. This seems to be a general relation that is independent of the way the hard surface has been realised. The corresponding relation for an open hard surface seems to be that the bandwidth is inversely proportional to the length of it ...
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Design of a printed compact antenna with enhanced impedance bandwidth
Microwave and Optical Technology Letters, 2012AbstractA novel compact ultrawideband planar antenna fed by a microstrip line is proposed. The proposed antenna consists of a rectangular patch and a defected ground plane with a semicircular notch and two stubs. The modified ground plane is used to achieve the wide impedance bandwidth. The measured results show that the antenna has a bandwidth 2.1–2.6
Lei Chang +4 more
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