A Fully Reconfigurable RF Vector Modulator based Wideband Phase Shifter for NextG Beamforming Phased Array in Satellite Communications (SATCOM)
Hanxiang Zhang, Hao Yan, Hong Tang, Uzair Muhammad, Ayesha Naseem, Saeed Zolfaghary Pour, Po-Wei Liu, Fei Yan, Shehryar Niazi, Jintao Chen
Abstract
This paper presents a fully reconfigurable RF vector modulator (RFVM)-based phase shifter for wideband beamforming phased array of 6G/NextG satellite communication (SATCOM). It covers the frequency range from S-band up to Ku-band. Specifically, the proposed RFVM features a novel vector modulation approach that relaxes the frequency constraint in conventional scenario while avoiding applying a quarter all-pass filtering (QAF) network. It achieves a topology that RF input signal is divided into multi-branch transversal sections where each branch enables individual gain weightings and phase delays. By resumming the signals from all branches, the output signal of proposed RFVM can realize a full 360 degree phase shifting while it preserves magnitude response in wideband scenario.
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