TERAHERTZ MEASUREMENTS OF RESONANT PLANAR ANTENNAS COUPLED TO LOW-TEMPERATURE-GROWN GAAS PHOTOMIXERS

Resonant slot and dipole antennas coupled to low-temperature-grown GaA s photomixers have been fabricated and tested at terahertz operating f requencies. Enhanced output power is seen from the resonant structures compared to mixers coupled to broadband self-complementary spiral ant ennas. Driving point impedances as high as 300 Omega are attained at t he resonant frequencies. These devices will be useful as fixed frequen cy local oscillators for submillimeter heterodyne receivers. (C) 1996 American Institute of Physics.