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：
美国国家科学基金会; 美国国家航空航天局;
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.
引用
收藏
页码：3053 / 3056
页数：4
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