Tielin Zhang, Hongmei Liu, Xuejiao Wang, Yao Wang, Shaojun Fang
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C-Band Full-360° Reflection-Type Phase Shifter Implemented by Trans-Directional Coupler Using Vertically Installed Planar Technique
In this study, a C-band full-360° reflection-type phase shifter (RTPS) using trans-directional (TRD) coupler implemented with vertically installed planar (VIP) structure is presented. By realizing the TRD coupler with VIP structure, the poor performance of the commercial capacitor at high frequencies caused by capacitor-tolerance can be avoided. Besides, full-360° phase shifts can be obtained by the proposed reflective loads. For validation, a prototype is designed, fabricated, and measured. Due to the unique structure of the TRD coupler, only one DC power supply is needed for controlling the two reflective loads simultaneously. The results show a maximum phase shift of 380° at the center frequency, which demonstrates the applications in C-band phased arrays.
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