We demonstrate and model an on-chip frequency-domain transceiver which uses low-temperature-grown GaAs photoconductors to emit and detect continuous waves in the frequency range from 20 to 700 GHz propagating in a coplanar waveguide circuit. Our device has a possible frequency resolution (∼1 MHz) that is about 103 times better than similar devices used for time-domain spectroscopy, and is therefore appropriate for high-resolution spectroscopy with a “lab-on-a-chip”-type integrated circuit.
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Zamdmer et al. (1999) studied this question.
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