Design of Stacked Circular/Quasi-Elliptical Patch Array for Broadband CP Applications

Publisher:
IEEE Press
Publication Type:
Conference Proceeding
Citation:
ISAPE'03 Proceedings, 2003, pp. 62 - 65
Issue Date:
2003-01
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This paper presents a design of circularly polarised 4-element planar subarrays composed of low axial-ratio stacked patch elements in X-band. The wideband circular polarisation is excited using stacked circular disc and quasi-elliptical patch that printed on a superstrate with low dielectric constant (ε = 2.2) and a high dielectric constant (ε = 6.15) material as the substrate, respectively. The proposed element exhibits low mutual coupling in two principle planes that is comparable to a single-layer inside the subarray, a pair of microstrip-line fed elements was considered and arranged in four scenarios. Low sidelobe levels and 2-dB axial-ratio bandwidth of 19.5% in addition to a boresight axial-ratio of 0.15 are achieved. Variations in gain and axial ratio other than boresight (? ? 0) in azimuth plane are also examined
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