94-GHz 360° reflective-type phase shifter with minimal loss variation using triple-resonating load technique
This Letter reports a 360° reflective-type phase shifter in 100-nm InGaAs pHEMT technology. A triple-resonating load technique is proposed and the optimum conditions are derived to achieve full 360° phase-shift range and minimise the insertion loss variation. The implemented reflective-type phase shifter achieves a measured phase-shift range of 360° and an insertion loss of at 94 GHz. Measured return loss is better than 14 dB across 360° phase-shift range.