Design of a lumped array of Josephson junction oscillators

Author

Edstam, J. ; Olsson, H.K.

Author_Institution

Dept. of Phys., Chalmers Univ. of Technol., Goteborg, Sweden

Volume

3

Issue

1

fYear

1993

fDate

3/1/1993 12:00:00 AM

Firstpage

2496

Lastpage

2499

Abstract

It is shown that inductively resistively shunted junctions are good candidates for Josephson-junction oscillator arrays. The shunt resonates out the junction intrinsic capacitance, allowing a much higher effective impedance at the resonance frequence, but still with a small shunt resistance giving a narrow linewidth. Compared to resistively shunted junctions they are advantageous for frequencies greater than about 100 GHz, when fewer junctions and lumped arrays can be used, giving larger bandwidths. Design rules that avoid chaotic solutions and optimize output power are given. A design example of an integrated circuit consisting of an SIS-mixer pumped by an array of as few as four junctions at 350 GHz is given. A bandwidth of 160 GHz and a linewidth of 400 kHz should be feasible in a practical situation.<>

Keywords

Josephson effect; microwave oscillators; mixers (circuits); superconducting integrated circuits; superconducting junction devices; superconducting microwave devices; 160 GHz; 350 GHz; Josephson junction oscillators; SIS-mixer; inductively resistively shunted junctions; integrated circuit; lumped array; narrow linewidth; pump array; shunt resistance; Bandwidth; Capacitance; Chaos; Design optimization; Impedance; Josephson junctions; Oscillators; Power generation; Resonance; Resonant frequency;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.233963

Filename

233963