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In this brief, a novel differential branch-line coupler based on substrate integrated suspended parallel strip Line (SISPSL) is proposed. The differential branch-line coupler is based on the multilayer structure, and… Click to show full abstract
In this brief, a novel differential branch-line coupler based on substrate integrated suspended parallel strip Line (SISPSL) is proposed. The differential branch-line coupler is based on the multilayer structure, and utilizes the inherent differential characteristics of parallel strip line to construct the feeding port. The common-mode suppression is enhanced by loading a quarter-wavelength stub on the main transmission line at each port. The proposed SISPSL coupler is designed and fabricated using the PCB process, and it has the advantages of self-packaging and high common-mode suppression.
Journal Title: IEEE Transactions on Circuits and Systems II: Express Briefs
Year Published: 2023
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