Design of Compact Ultrawideband Slot Antenna With Improved Band-Edge Selectivity

A small ultrawideband (UWB) slot antenna is proposed using a stepped impedance resonator feeding line, aiming at improving band-edge selectivity. The proposed antenna mainly comprises a feeding line with low-pass characteristics at the top of the dielectric substrate and two slots at the bottom. The...

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Published in:IEEE antennas and wireless propagation letters 2018-06, Vol.17 (6), p.946-950
Main Authors: Yang, Hailong, Xi, Xiaoli, Zhao, Yuchen, Wang, Lili, Shi, Xiaomin
Format: Article
Language:English
Subjects:
Antenna feeds
Band-edge selectivity
Bandwidth
Impedance
Resonant frequency
slot antenna
Slot antennas
Ultra wideband antennas
ultrawideband (UWB)
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creator Yang, Hailong
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Zhao, Yuchen
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description A small ultrawideband (UWB) slot antenna is proposed using a stepped impedance resonator feeding line, aiming at improving band-edge selectivity. The proposed antenna mainly comprises a feeding line with low-pass characteristics at the top of the dielectric substrate and two slots at the bottom. The stepped impedance resonator is used to improve the upper band-edge selectivity, and the narrow slot near the stepped slot improves the lower band-edge selectivity. The frequency selection range, the frequency selective characteristic, and the reflected zeros of the antenna upper band-edge are analyzed and studied. The measured results show that the antenna covers the frequency range of UWB systems from 3.1 to 11 GHz (114%) with the reflection coefficient less than −10 dB. Compared with the traditional UWB antenna, the proposed compact antenna has advantages in size and band-edge selectivity and is more suitable for UWB applications. The ratio of the −3 dB bandwidth to the −10 dB bandwidth is 1.038, which is very close to 1.
doi_str_mv 10.1109/LAWP.2018.2825453
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subjects Antenna feeds
Band-edge selectivity
Bandwidth
Impedance
Resonant frequency
slot antenna
Slot antennas
Ultra wideband antennas
ultrawideband (UWB)
title Design of Compact Ultrawideband Slot Antenna With Improved Band-Edge Selectivity
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