Year: 2009
Type: article
Abstract: GaAs Schottky barrier diodes (SBDs) coupled with a thin-film slot antenna were fabricated using a microfabrication technique, and video detection and mixing properties were investigated at 94 GHz. In the video detection, the bias voltage dependence of detected voltage showed almost the same variation with the calculated value derived from the theory of square-law detection. It was confirmed that detected voltage was obtained from the nonlinearity of the current–voltage ( I – V ) characteristic of the device. A Si extended hemispherical lens was coupled to the device to improve device responsivity. The increase in detected voltage was 22.2 dB upon using a lens with a radius of 10 mm, and a noise equivalent irradiance (NEI) of 1.2 × 10 -10 W/(cm 2 ·Hz 1/2 ) was obtained. In the mixing, IF signals were observed up to a harmonic number of 7 using the thin-film GaAs SBD.
Authors: Kosuke Hayashi, Takashi Tachiki, Takashi Uchida, Takashi Furuya, Toshitaka Idehara, Yoshizumi Yasuoka
Institutions: National Defense Academy of Japan, University of Fukui
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2019868201