Superconductive hot electron mixers for THz heterodyne receiver applications

被引：1

作者：

McGrath, WR ^{[1
]}

Skalare, A ^{[1
]}

Karasik, B ^{[1
]}

Gaidis, M ^{[1
]}

Bumble, B ^{[1
]}

LeDuc, HG ^{[1
]}

Burke, PJ ^{[1
]}

Schoelkopf, RJ ^{[1
]}

Prober, DE ^{[1
]}

机构：

[1] CALTECH, Jet Prop Lab, Ctr Space Microelect Technol, Pasadena, CA 91109 USA

来源：

ADVANCED TECHNOLOGY MMW, RADIO, AND TERAHERTZ TELESCOPES | 1998年 / 3357卷

关键词：

submillimeter; heterodyne; mixer; hot electron bolometer; terahertz; superconductor; far infrared;

D O I：

10.1117/12.317341

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report on the development of quasioptical Nb hot-electron bolometer mixers for heterodyne receivers operating at 1 THz - 3 THz. The devices have submicron in-plane sizes, thus exploiting diffusion as the electron cooling mechanism. Quasioptical mixer circuits have been developed with planar double-dipole or twin-slot antennas. The measured (DSB) receiver noise temperatures are 1670 K at 1.1 THz, with an estimated mixer noise temperature of = 1060 K, and 2750 K at 2.5 THz, with an estimated mixer noise temperature of approximate to 900 K. The IF bandwidth is found to scale as the length-squared, and bandwidths as high as 8 GHz have been measured. These results demonstrate the low-noise, broadband operation of the diffusion-cooled bolometer mixer over a wide range of far-infrared wavelengths.

引用

页码：14 / 21

页数：8