A 1.5-6 GHz Continuous Tuned GaAs MMIC Phase Shifter

Abstract

This letter presents a 1.5–6 GHz 360° continuous tuned analog phase shifter (PS) block for the 5G application. The analog PS consists of a tunable low-pass network (LPN), a high-pass network (HPN), and an all-pass network (APN). The phase shift response is nearly constant over the operating frequency range. The fabricated analog PS has a low average insertion loss of 6.5 dB, low root-mean-square (rms) phase error less than $< 10.8^{\circ}$, and low rms amplitude error less than 0.75 dB between 1.5–6 GHz. The proposed analog PS achieved excellent performance compared with previously reported pass PSs over a wide bandwidth.