Absorptive Microstrip-Fed Slot Antenna With Wide Reflectionless Band by Loading Bandstop Filter

This paper presents an absorptive microstrip-fed slot antenna with a wide reflectionless band and high radiation efficiency. The proposed antenna consists of a microstrip-fed slot antenna, a quarter-wavelength coupled-line bandstop filter (BSF), and absorptive resistors attached to a grounding pad....

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Autores principales:	Yanqun Liu, Peng Zhou, Shunli Li, Hongxin Zhao, Xiaoxing Yin
Formato:	article
Lenguaje:	EN
Publicado:	IEEE 2021
Materias:	Absorptive antenna bandstop filter reflectionless slot antenna Telecommunication TK5101-6720
Acceso en línea:	https://doaj.org/article/c9d4a47093b64fd0be9a0b9c782932a3
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id	oai:doaj.org-article:c9d4a47093b64fd0be9a0b9c782932a3
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spelling	oai:doaj.org-article:c9d4a47093b64fd0be9a0b9c782932a32021-11-18T00:11:28ZAbsorptive Microstrip-Fed Slot Antenna With Wide Reflectionless Band by Loading Bandstop Filter2637-643110.1109/OJAP.2021.3124338https://doaj.org/article/c9d4a47093b64fd0be9a0b9c782932a32021-01-01T00:00:00Zhttps://ieeexplore.ieee.org/document/9596594/https://doaj.org/toc/2637-6431This paper presents an absorptive microstrip-fed slot antenna with a wide reflectionless band and high radiation efficiency. The proposed antenna consists of a microstrip-fed slot antenna, a quarter-wavelength coupled-line bandstop filter (BSF), and absorptive resistors attached to a grounding pad. The BSF and absorptive resistors are connected to the end of the microstrip feedline. The slot antenna and the BSF are designed to work at the same frequency. In the working band, the high input impedance of the BSF exactly matches the slot antenna for effective radiation. While out of the working band, since the input impedance looking towards the end of the slot antenna matches well with that of the BSF, the energy will flow through the BSF and then be absorbed by the absorptive resistors. In this way, the energy both in and out of the working band will not be reflected back to the input port, which presents a wide reflectionless band. To demonstrate this idea, a prototype operating at 3 GHz is designed, fabricated, and measured. The measurements show that the proposed antenna is well matched (<inline-formula> <tex-math notation="LaTeX">$\|S_{11}\|< -10$ </tex-math></inline-formula> dB) in a wide frequency band from DC to 5.3 GHz, the 3-dB gain bandwidth covers from 2.85 GHz to 3.24 GHz with a peak gain of 4.54 dBi, the peak radiation efficiency can reach 93%, and a bidirectional radiation pattern is realized with more than 20 dB cross-polarization suppression in main radiation directions.Yanqun LiuPeng ZhouShunli LiHongxin ZhaoXiaoxing YinIEEEarticleAbsorptive antennabandstop filterreflectionlessslot antennaTelecommunicationTK5101-6720ENIEEE Open Journal of Antennas and Propagation, Vol 2, Pp 1071-1078 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Absorptive antenna bandstop filter reflectionless slot antenna Telecommunication TK5101-6720
spellingShingle	Absorptive antenna bandstop filter reflectionless slot antenna Telecommunication TK5101-6720 Yanqun Liu Peng Zhou Shunli Li Hongxin Zhao Xiaoxing Yin Absorptive Microstrip-Fed Slot Antenna With Wide Reflectionless Band by Loading Bandstop Filter
description	This paper presents an absorptive microstrip-fed slot antenna with a wide reflectionless band and high radiation efficiency. The proposed antenna consists of a microstrip-fed slot antenna, a quarter-wavelength coupled-line bandstop filter (BSF), and absorptive resistors attached to a grounding pad. The BSF and absorptive resistors are connected to the end of the microstrip feedline. The slot antenna and the BSF are designed to work at the same frequency. In the working band, the high input impedance of the BSF exactly matches the slot antenna for effective radiation. While out of the working band, since the input impedance looking towards the end of the slot antenna matches well with that of the BSF, the energy will flow through the BSF and then be absorbed by the absorptive resistors. In this way, the energy both in and out of the working band will not be reflected back to the input port, which presents a wide reflectionless band. To demonstrate this idea, a prototype operating at 3 GHz is designed, fabricated, and measured. The measurements show that the proposed antenna is well matched (<inline-formula> <tex-math notation="LaTeX">$\|S_{11}\|< -10$ </tex-math></inline-formula> dB) in a wide frequency band from DC to 5.3 GHz, the 3-dB gain bandwidth covers from 2.85 GHz to 3.24 GHz with a peak gain of 4.54 dBi, the peak radiation efficiency can reach 93%, and a bidirectional radiation pattern is realized with more than 20 dB cross-polarization suppression in main radiation directions.
format	article
author	Yanqun Liu Peng Zhou Shunli Li Hongxin Zhao Xiaoxing Yin
author_facet	Yanqun Liu Peng Zhou Shunli Li Hongxin Zhao Xiaoxing Yin
author_sort	Yanqun Liu
title	Absorptive Microstrip-Fed Slot Antenna With Wide Reflectionless Band by Loading Bandstop Filter
title_short	Absorptive Microstrip-Fed Slot Antenna With Wide Reflectionless Band by Loading Bandstop Filter
title_full	Absorptive Microstrip-Fed Slot Antenna With Wide Reflectionless Band by Loading Bandstop Filter
title_fullStr	Absorptive Microstrip-Fed Slot Antenna With Wide Reflectionless Band by Loading Bandstop Filter
title_full_unstemmed	Absorptive Microstrip-Fed Slot Antenna With Wide Reflectionless Band by Loading Bandstop Filter
title_sort	absorptive microstrip-fed slot antenna with wide reflectionless band by loading bandstop filter
publisher	IEEE
publishDate	2021
url	https://doaj.org/article/c9d4a47093b64fd0be9a0b9c782932a3
work_keys_str_mv	AT yanqunliu absorptivemicrostripfedslotantennawithwidereflectionlessbandbyloadingbandstopfilter AT pengzhou absorptivemicrostripfedslotantennawithwidereflectionlessbandbyloadingbandstopfilter AT shunlili absorptivemicrostripfedslotantennawithwidereflectionlessbandbyloadingbandstopfilter AT hongxinzhao absorptivemicrostripfedslotantennawithwidereflectionlessbandbyloadingbandstopfilter AT xiaoxingyin absorptivemicrostripfedslotantennawithwidereflectionlessbandbyloadingbandstopfilter
_version_	1718425191341621248

Absorptive Microstrip-Fed Slot Antenna With Wide Reflectionless Band by Loading Bandstop Filter

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