Harmonic mixing in a series array of short superconducting weak-links

Author

Matsui, T. ; Komiyama, B. ; Ohta, H.

Author_Institution

Commun. Res. Lab., Minist. of Posts & Telecommun., Tokyo, Japan

Volume

25

Issue

2

fYear

1989

fDate

3/1/1989 12:00:00 AM

Firstpage

1072

Lastpage

1075

Abstract

A new type of harmonic mixer using a series array of short superconducting weak-links is proposed for mixer applications at far-infrared and submillimeter-wave frequencies. The problem of limited mixer dynamic range can be eliminated by the use of a Josephson junction series array structure. Using a eleven-element series array, a preliminary experiment on harmonic mixing was carried out for two signals at 105.9 GHz and 5.4-12.6 GHz. IF (intermediate frequency) output was measured for each harmonic order from 9th to 19th by optimizing local power and bias voltage. In this experiment, 5-dB heightening of the signal-to-noise ratio was obtained at the IF output when the harmonic mixing order n was equal to the series element number, N=11

Keywords

Josephson effect; mixers (circuits); solid-state microwave devices; submillimetre wave devices; superconducting junction devices; 105.9 GHz; 5.4 to 12.6 GHz; FIR frequencies; Josephson junction; SNR; far-infrared; harmonic mixer; microwave device; series array; short superconducting weak-links; submillimeter-wave; Chemicals; Frequency conversion; Josephson junctions; Mixers; Noise generators; Signal to noise ratio; Superconducting device noise; Superconducting microwave devices; Voltage; Wideband;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.92474

Filename

92474