35 GHz varactor analogue phase modulator in integrating waveguide technology

Design method, fabrication process, and measurement results of a linear analog phase modulator in Ka-band with abrupt varactor diode are presented. The modulator was realized in integrating waveguide technology, which is based on a completely dielectric-filled rectangular waveguide. The 180 deg phase shift over the frequency band 34.3-35.4 GHz been received with phase nonlinearity less than 3.5 percent and insertion loss of 3 + or - 0.4 dB.