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This paper presents a compact circularly-polarized microstrip array antenna with four square patches fed in phase quadrature such that a phase shift of 90° between each neighbouring patches, thus providing circularly polarized pattern. The feeding network is placed on the opposite side of the patches' ground plane and is designed using three Wilkinson power dividers having different output lengths...
This paper presents a compact dual-feed patch antenna capable of achieving dual-polarized radiation suitable for applications demanding frequency reuse or polarization diversity. Circular polarization is obtained by feeding the antenna with 90° phase shift between its two ports using Wilkinson power divider having λ/4 difference between its outputs. This proposed circularly polarized antenna is suitable...
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