A photomixer local oscillator for a 630-GHz heterodyne receiver

被引：38

作者：

Verghese, S

Duerr, EK

McIntosh, KA

Duffy, SM

Calawa, SD

Tong, CYE

Kimberk, R

Blundell, R

机构：

[1] MIT, Lincoln Lab, Lexington, MA 02420 USA

[2] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA

来源：

IEEE MICROWAVE AND GUIDED WAVE LETTERS | 1999年 / 9卷 / 06期

基金：

美国国家航空航天局;

关键词：

Gallium materials devices; photomixers; submillimeter wave oscillators; superconductor-insulator-superconductor mixers;

D O I：

10.1109/75.769535

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：

A photomixer local oscillator (LO) operating at the 630-GHz difference frequency of two laser diodes was successfully demonstrated with a heterodyne detector based on a niobium superconducting tunnel junction. The low-temperature-grown GaAs photomixer generated 0.20 mu W in the input spatial mode of the receiver. Using the photomixer LO, the double-sideband noise temperature of the receiver was 331 K-in good agreement with the 323-K noise temperature obtained when a multiplied Gunn oscillator generating 0.25 mu W was substituted for the photomixer.

引用

页码：245 / 247

页数：3

共 16 条

[1] Quasi-optical SIS mixers with normal metal tuning structures [J].