Research on Millimeter Wave Communication in Japan

The present status of the research on millimeter wave communication in Japan is reviewed. This paper begins with a description of a millimeter-wave PCM transmitter assembly composed of an 12 GHz band diode switch and a quadrupler. This assembly was developed for the purpose of building an experimental PCM repeater for a long distance circular-electric-waveguide communication system. A repeater circuitry associated with this assembly is described. Germanium silber-bonded diode GSB3 generates above 0 dBm of millimeter continuous wave in the avalanche bias region. New components for repeater including this diode which would offer advantages in simplifying repeater, are also discussed.