Low-loss 360 degrees X-band analog phase shifter

A low-loss reflection-type analog phase shifter circuit is described, and experimental results are presented. The circuit incorporates several design features to produce nearly 360 degrees of phase shift at X-band while achieving an insertion loss of only 4.8 dB with +or-0.5 dB of variation over all phase states. These results improve upon previously reported X-band performance by demonstrating a large phase shift range together with low attenuation and low amplitude variation with phase state.<>