Gain Enhancement in Inductively-Loaded Distributed SIS Junction Arrays

Author

Tong, Cheuk-Yu Edward ; Blundell, Raymond ; Megerian, Krikor G. ; Stern, Jeffrey A. ; Pospieszalski, Marian ; Pan, Shing-Kuo

Author_Institution

Harvard-Smithsonian Center for Astrophys., Cambridge

Volume

17

Issue

2

fYear

2007

fDate

6/1/2007 12:00:00 AM

Firstpage

371

Lastpage

374

Abstract

Due to their very low IF output capacitance, series-connected distributed SIS junction array mixers possess very wide IF bandwidth. However, careful control of parasitic inductance in the IF network is important in order to obtain a flat IF response in this class of wideband mixer. We have studied the effect of inductive loading on the operation of these mixers, both experimentally and theoretically. It is shown that over the range of IF where the reactive part of the load impedance is large, a higher mixer conversion gain accompanied by a lower noise temperature is observed.

Keywords

capacitance; submillimetre wave mixers; superconductor-insulator-superconductor mixers; SIS junction array mixers; gain enhancement; low IF output capacitance; submillimeter waves; superconductor-insulator-superconductor mixers; wideband mixer; Bandwidth; Bonding; Capacitance; Frequency; Grounding; Impedance; Inductance; Mixers; Superconducting device noise; Wires; Intermediate frequency bandwidth; mixer theory; submillimeter waves; superconductor-insulator-superconductor mixers;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2007.898180

Filename

4277763