We have developed all-electronic integrated circuits that generate and detect picosecond pulses. We have used these circuits with integrated antennas in a system capable of free-space spectroscopy in the terahertz regime. With this system we have measured magnitude- and phase-transmission characteristics for a variety of samples in the frequency range of 200 GHz–1 THz.
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Bostak et al. (1994) studied this question.
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