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Backward-wave oscillators for the frequency range from 600 GHz to 1800 GHz

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3 Author(s)
Barnett, L.R. ; Dept. of Electr. Eng., Utah Univ., Salt Lake City, UT, USA ; Grow, R.W. ; Baird, J.M.

The authors describe an effort to develop O-type backward-wave oscillators for the frequency range from 600-1800 GHz for local oscillators in spectroscopy measurements in space applications. Recent interdigital O-type backward-wave oscillators have yielded RF output in the frequency range from 200-800 GHz. One of these oscillators used aluminium metallization on a type-2A diamond substrate. A second interdigital circuit was built to gain more experience with this type of circuit at a lower frequency. The circuit was fabricated with aluminium metallization on a crystalline quartz substrate, but with only the metallization etched to form the interdigital circuit and no etching of the substrate. A third tube utilizes a tapered slot antenna to radiate the RF output to a hemispherical lens. The 44- mu m circuit used aluminium metallization on crystalline quartz, with no etching of the quartz.<>

Published in:

Electron Devices Meeting, 1988. IEDM '88. Technical Digest., International

Date of Conference:

11-14 Dec. 1988