A 200-285-GHz waveguide SIS mixer with an inhomogeneous distributed junction array

被引：3

作者：

Takeda, M

Noguchi, T

机构：

[1] Grad Univ Adv Studies, Dept Astron Sci, Nagano 3841305, Japan

[2] Natl Astron Observ, Nobeyama Radio Observ, Nagano 3841305, Japan

来源：

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES | 2002年 / 50卷 / 11期

关键词：

broad-band; distributed junction array; heterodyne receiver; noise temperature; submillimeter; superconductor-insulator-superconductor (SIS) mixer; waveguide;

D O I：

10.1109/TMTT.2002.804513

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：

In this paper, we present the experimental results of a waveguide superconductor-insulator-superconductor (SIS) mixer with an inhomogeneous distributed junction array. The mixer consists of five Nb-AlOx-Nb SIS junctions with different dimensions distributed on a superconducting microstrip. The critical current density of the fabricated junctions was 3100 A/cm(2). Detailed measurements of the receiver noise temperature have been made in the frequency range from 190 to 284 GHz at 4.2 K. A double-sideband (DSB) receiver noise temperature of 5hw/k was obtained in the frequency range from 202 to 284 GHz and the lowest DSB receiver noise temperature of 46 K was obtained at 210 GHz.

引用

页码：2618 / 2623

页数：6

共 14 条

[1] A WIDE-BAND FIXED-TUNED SIS RECEIVER FOR 200-GHZ OPERATION [J].