Reconfigurable Half Mode Substrate Integrated Waveguide Phase Shifter

In this work, we propose a novel phase shifter based on an eclectically reconfigurable half mode substrate integrated waveguide (HMSIW). The proposed structure uses a single PCB layer and does not require wire bounding for the bias circuit. Its principle consists in the integration, in the HMSIW, of several parallel lines, each of which is connecting the open edge of the HMSIW to a PIN diode and a radial stub. Simulation results are presented to validate the proposed concept. With the proposed design, for the two states of the PIN diodes (ON and OFF), broadband matching is obtained and a relatively constant phase difference is achieved in a broad frequency range.