Dual polarised aperture‐coupled patch antenna using asymmetrical feed. Issue 13 (1st October 2015)

• Record Type: Journal Article
• Authors: Fang, Qingyuan; Song, Lizhong; Jin, Ming; Han, Yong; Qiao, Xiaolin
• Is Part Of: IET microwaves, antennas & propagation. Volume 9:Issue 13(2015)
• Page Start: 1399
• Page End: 1406
• Publication Date: 2015-10-01
• Subjects: antenna feeds -- aperture antennas -- microstrip antennas -- antenna radiation patterns; dual polarised aperture‐coupled patch antenna -- symmetrical feed networks -- symmetrical radiation patterns -- orthogonal polarisations -- X‐band application -- asymmetrical feed structure -- impedance bandwidth -- current distributions analysis -- H‐planes -- E‐planes; Microwaves -- Periodicals; Microwave antennas -- Periodicals; Antennas (Electronics) -- Periodicals; Radio wave propagation -- Periodicals; Microwave communication systems -- Periodicals; 621.381305
• DOI: 10.1049/iet-map.2014.0647
• Languages: English
• ISSNs: 1751-8725

Abstract

Abstract : 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.