LOW-NOISE SLOT ANTENNA SIS MIXERS

被引：37

作者：

ZMUIDZINAS, J

UGRAS, NG

MILLER, D

GAIDIS, M

LEDUC, HG

STERN, JA

机构：

[1] California Institute of Technology, 320-47, Pasadena

[2] Jet Propulsion Laboratory, 302-231, Pasadena

来源：

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 1995年 / 5卷 / 02期

基金：

美国国家航空航天局; 美国国家科学基金会;

关键词：

D O I：

10.1109/77.403236

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We describe quasi-optical SIS mixers operating in the submillimeter band (500-750 GHz) which have very low noise, around 5 h nu/k(B) for the double-sideband receiver noise temperature. The mixers use a twin-slot antenna, Nb/Al-Oxide/Nb tunnel junctions fabricated with optical lithography, a two-junction tuning circuit, and a silicon hyperhemispherical lens with a novel antireflection coating to optimize the optical efficiency We have flown a submillimeter receiver using these mixers on the Kuiper Airborne Observatory, and have detected a transition of (H2O)-O-18 at 745 GHz. This directly confirms that SIS junctions are capable of low-noise mixing above the gap frequency.

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页码：3053 / 3056

页数：4

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