volume | PIER Journals

Abstract

In the paper, a planar wideband reflective phase shifter (RTPS) with wide phase shift range and simple control is proposed. It consists of a coupled-line based wideband 3-dB coupler and two multi-resonance reflective loads. By combining a series resonant circuit with a shunt resonant circuit to form multi-resonances, the phase shift range can be expanded with realizable capacitance values of the varactor diodes. The design equations are derived, and parametric analysis is provided. To verify the feasibility of the design methodology, an RTPS operating at the center frequency of 2 GHz is designed and fabricated. Measured results show that it exhibits a better than 10 dB input return loss bandwidth of 33.9% and a phase shift range of 320°. Besides, the size of the RTPS is only 0.41λ_g × 0.13λ_g, and can be controlled by simply one voltage.

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doi:10.2528/PIERL21091802

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Dr. Teng Ma

Professor Hongmei Liu

Dr. Yuyang Jiang

Dr. Zhongbao Wang