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This paper presents the design of planar 4times4 Butler matrix in X-band at center frequency of 8.3 GHz for satellite application. The Butler matrix is used as a beam-forming network to feed circularly polarized 4-element linear array to produce four steerable beams. The direction of these beam patterns are plusmn15deg and plusmn40deg with effective coverage over 120deg. The network is designed to...
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