24 GHz FET oscillator with slot antenna for quasi-optical transmitter

Shigeo Kawasaki

doi:10.1117/12.2297854

1 October 1991 24 GHz FET oscillator with slot antenna for quasi-optical transmitter

Shigeo Kawasaki

Proceedings Volume 1576, 16th International Conference on Infrared and Millimeter Waves; 15763X (1991) https://doi.org/10.1117/12.2297854
Event: 16th International Conference on Infrared and Millimeter Waves, 1991, Lausanne, Switzerland

Abstract

Microwave quasi-optical integrated circuits has a potential for low cost manufacturing, simple design, small size and high efficiency. Several works for the quasi-optical components were reported[1]. Due to its planar configuration, monolithic technology can also be applied. In order to meet these requirements, in particular simple design and small size, we proposed a layered structure with a slot formed in the ground plane of the microstrip circuit[2][3]. The slot is electromagnetically coupled through a microstrip to slotline transition to realize the layered structure. Thus, an antenna and a circuit are fabricated on both sides of a dielectric substrate.

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.

Citation Download Citation

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); https://doi.org/10.1117/12.2297854

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