Abstract
We demonstrate a heterodyne receiver using a photoconductive (PC) antenna in the sub-THz region. In our system, the PC antenna is irradiated by a beam with intensity modulation with a frequency f1 and the conductivity of the PC antenna is modulated with this frequency. Simultaneously an electromagnetic radiation with a frequency f2 is incident on the PC antenna. If f1≈f2, the down converted signal is induced in the PC antenna and is detected by an electric spectrum analyzer. Using this system we detect a signal of radiation with the frequency of 50.3 GHz.
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