Open AccessDual‐polarised X‐band patch sub‐array with hybrid feed network for integrated small‐satellite SAR payload
Author(s) -
Zhao X.,
Yeo S.P.,
Ong L.C.
Publication year - 2017
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2017.2208
Subject(s) - beamwidth , x band , payload (computing) , communications satellite , c band , synthetic aperture radar , wideband , satellite , optics , physics , multi band device , aperture (computer memory) , bandwidth (computing) , computer science , remote sensing , telecommunications , acoustics , antenna (radio) , geology , computer network , network packet , astronomy
A low‐profile wideband dual‐polarised X‐band patch sub‐array fed by a hybrid series/parallel network is designed for an integrated small‐satellite synthetic aperture radar payload. The experimental results demonstrate that the sub‐array, with 1 × 16 patch radiators, fully covers the targeted 9.65 GHz band with 14 dB bandwidths of 9–10.3 GHz for V‐polarisation (VP) and 9.3–9.95 GHz for H‐polarisation (HP). The isolation between the different feed ports is higher than 36 dB with a peak value of 45 dB. The sub‐array achieves cross‐to‐co‐polarisation ratios of below −32 dB within half‐power beamwidth scopes of 6° for both HP and VP. The sidelobes maintain −24 dB for HP and −20 dB for VP. The average realised gains are around 17 dBi for both polarisations.