Dual polarised aperture-coupled patch antenna using asymmetrical feed
Dual polarised aperture-coupled patch antenna using asymmetrical feed
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使用不对称馈电的双极化孔径耦合贴片天线
DOI:
10.1049/iet-map.2014.0647
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发表时间:
2015-07
期刊:
影响因子:
--
通讯作者:
Xiaolin Qiao
中科院分区:
文献类型:
--
作者:
Lizhong Song;Ming Jin;Yong Han;Xiaolin Qiao
Dual polarised antennas are normally fed by symmetrical feed networks in order to obtain symmetrical radiation patterns for two orthogonal polarisations. In this study, a dual polarised aperture-coupled patch antenna using asymmetrical feed for X-band application is proposed. The exploitation of asymmetrical feed structure in exciting dual polarisations turns out to be valid, and is capable of realising symmetrical radiation patterns just as the traditional feed networks have done. Besides, the asymmetrical feed provides a wide impedance bandwidth and high isolation between ports. Key parameters studies and current distributions analysis prove the feasibility of the asymmetrical feed. Both simulated and measured results indicate an impedance bandwidth over 35.2% and the isolation is higher than 30 dB over the entire bandwidth. The cross-polarisation levels in the E- and H-planes for both polarisations are lower than −20 dB. Moreover, the antenna prototype shows good symmetrical property in radiation patterns for dual polarisations.
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