An 8–18 GHz 90° Switched T-Type Phase Shifter

This paper proposes a novel 8–18 GHz 90° switched T-type phase shifter (TPS). In contrast to the conventional TPS, proposed TPS adds compensation capacitance greatly enhance shifting capacity. Moreover, designed structure also integrates filtering network, which can effectively achieve flat relative shift in wide band. The is fabricated using 0.15 μm GaAs pHEMT technology. achieves homogeneous at GHz, with measured error of less than ±1.5°. insertion loss 1.3–2.6 dB, and chip size merely 0.53 × 0.86 mm2. Thanks these excellent performance characteristics, well-suited for ultra-wideband wireless communication radar systems.