A low-noise micromachined millimeter-wave heterodyne mixer using Nb superconducting tunnel junctions

被引：4

作者：

deLange, G ^{[1
]}

Jacobson, BR ^{[1
]}

Hu, Q ^{[1
]}

机构：

[1] MIT,ELECTR RES LAB,CAMBRIDGE,MA 02139

来源：

APPLIED PHYSICS LETTERS | 1996年 / 68卷 / 13期

关键词：

D O I：

10.1063/1.116038

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A heterodyne mixer with a micromachined horn antenna and a superconductor-insulator-superconductor (SIS) tunnel junction as mixing element is tested in the W-band (75-115 GHz) frequency range. Micromachined integrated horn antennas consist of a dipole antenna suspended on a thin Si3N4 dielectric membrane inside a pyramidal cavity etched in silicon. The mixer performance is optimized by using a backing plane behind the dipole antenna to tune out the capacitance of the tunnel junction. The lowest receiver noise temperature of 30+/-3 K (without any correction) is measured at 106 GHz with a 3-dB bandwidth of 8 GHz. This sensitivity is comparable to the state-of-the-art waveguide and quasi-optical SIS receivers, showing the potential use of micromachined horn antennas in imaging arrays. (C) 1996 American Institute of Physics.

引用

页码：1862 / 1864

页数：3

共 13 条

[1] A 335 GHZ QUASI-OPTICAL SCHOTTKY RECEIVER [J].