Transmit-Receive Isolation Improvement of Antenna Arrays by Using EBG Structures

The mushroom-like electromagnetic band-gap (EBG) structure combined with a choke structure is applied to improve the transmit-receive (T/R) isolation of two X-band large antenna arrays. The basic idea presented is to suppress the surface wave propagation between the T/R arrays by utilizing EBG walls...

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Published in:IEEE antennas and wireless propagation letters 2012, Vol.11, p.93-96
Main Authors: Lei Qiu, Fei Zhao, Ke Xiao, Shun-Lian Chai, Jun-Jie Mao
Format: Article
Language:English
Subjects:
Choke structure
electromagnetic band-gap (EBG) structures
Inductors
Metals
Metamaterials
Microstrip antenna arrays
Periodic structures
surface wave suppression
transmit-receive (T/R) isolation
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Fei Zhao
Ke Xiao
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Jun-Jie Mao
description The mushroom-like electromagnetic band-gap (EBG) structure combined with a choke structure is applied to improve the transmit-receive (T/R) isolation of two X-band large antenna arrays. The basic idea presented is to suppress the surface wave propagation between the T/R arrays by utilizing EBG walls formed through a vertical configuration of the EBG cells, so as to improve the T/R isolation. The isolation level of the arrays with the EBG walls and a metal choke is measured and compared to other isolation methods applied. The experimental results show that by using this combined structure, the isolation level can be improved by at least 30 dB in the radar's operation band, which shows its high efficiency.
doi_str_mv 10.1109/LAWP.2012.2183847
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subjects Choke structure
electromagnetic band-gap (EBG) structures
Inductors
Metals
Metamaterials
Microstrip antenna arrays
Periodic structures
surface wave suppression
transmit-receive (T/R) isolation
title Transmit-Receive Isolation Improvement of Antenna Arrays by Using EBG Structures
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