An E-band Reconfigurable Phase Shifter Based on Gap Waveguide

A compact low-loss reconfigurable phase shifter based on gap waveguide (GW) is proposed. The phase shifter is realized by controlling the different lengths of the transmission line. A movable metal block is placed on the transmission line, and different phase shifts can be obtained through different moving distances to realize reconfiguration. The use of GW technology not only enables the design to achieve low-cost manufacturing and simple implementation, but also eliminates the resonance caused by the gap. The simulation S-parameters show that the impedance matching bandwidth with reflection coefficients below −15 dB is 19.1%, covering 71 – 86 GHz, and the maximum phase shift of 180° can be achieved.