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Photomixer as a self-oscillating mixer

Authors:
Shuji Matsuura
Abstract:
Photomixing with low-temperature-grown (LTG) GaAs photomixers is known as a promising technique to generate the coherent radiation in the terahertz (THz) range. In principle, the photomixer could also be used for detecting the THz radiation as a tunable heterodyne mixer with an internal local oscillator, and such a self-oscillating mixer would allow us to construct a simple and tunable receiver system without external local oscillator source. According to a simple photoconductor theory, the conversion efficiency and the noise of the LTG-GaAs photomixer receiver are estimated. It is shown that the performance of the photomixer receiver is reasonably high, if the device design is optimized to get a high photoconductivity, and if the device is cooled down to minimize the thermal noise contribution.
Categories:
Poster Session
Year:
2001
Session:
5
Full-text:
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Page Number(s):
234-243