2024
DOI: 10.1002/mop.70051
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Synthesis of Four‐Coupled‐Line Based Wideband Coupler With Inherent Filtering Feature and Its Modification

Yan Zhang,
Hongmei Liu,
Siran Zhang
et al.

Abstract: In the paper, a compact wideband filtering quadrature coupler is proposed, which utilizes the inherent filtering feature of the unequal‐width four‐coupled‐line (FCL) for the first time. Simply by assigning four terminals of the FCL as open‐circuited, the functions of power division, quadrature phase, and inherent filtering response are obtained simultaneously within a wideband. It also has the merits of high directivity and low insertion loss. Since the proposed FDC has the inherent filtering feature without a… Show more

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