volume | PIER Journals

Abstract

This paper proposes a compact and miniaturized branch-line coupler using a crossing bond wire structured slow-wave branch line (CBWSWB). The proposed coupler achieves a size reduction of 82% compared with a conventional implementation. Measured S₁₁, S₂₁, S₃₁ and S₄₁ of the proposed coupler are better than -24, -3.7, -3.7 and -28 dB at 3 GHz, respectively. Furthermore, the phase difference between through and coupling ports of the coupler is within 1°.

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Professor Bo Zhou

Dr. Qiang Ma

Dr. Liwei Yan

Dr. Na Zhou

Dr. Chong-Hu Cheng