This paper describes the design and the experimental results of the 24 GHz negative resistance oscillator circuit for layered quasi-optical transmitter components. The technology for the 10 GHz negative resistance oscillator was scaled for use at a higher frequency with a HEMT (HJFET) as the oscillator source and a 1-λ, slot antenna as the radiator. The design concept for layered quasi-optical transmitter compoments was confirmed by fabrication and measurement at 24 GHz.
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Shigeo Kawasaki, "24 GHz FET oscillator with slot antenna for quasi-optical transmitter," Proc. SPIE 1576, 16th International Conference on Infrared and Millimeter Waves, 15763X (1 October 1991);