Gunnplexer is a microwave transmitter consisting of a Gunn-diode oscillator connected to a horn antenna. Usually, the entire device is a compact, self-contained unit. The output power is low. When the device is placed at the focal point of a large dish antenna with the horn pointing toward the dish reflector (conventional dish feed), considerable transmission range is possible. Used primarily by experimenters, and in wireless communications links.
See GUNN DIODE.