NDLI: Measurements of noise in Josephson-effect mixers

Content Provider	IEEE Xplore Digital Library
Author	Schoelkopf, R.J. Zmuidzinas, J. Phillips, T.G. LeDuc, H.G. Stern, J.A.
Copyright Year	1963
Abstract	We present new heterodyne receiver results obtained at 100 GHz using resistively-shunted Nb and NbN tunnel junctions. In addition, we have carried out accurate measurements of the available noise power of these devices at the L-band (1.5 GHz) IF frequency. Both the heterodyne and the output noise measurements show that the noise of these devices can be a factor of five or more higher than that predicted by the simple current-biased RSJ model. The noise approaches the appropriate thermal or thermal and shot noise limits for bias voltages where the nonlinearity is not strong (i.e., V>I/sub C/R/sub N/), but as expected from the RSJ model, can be significantly higher at the low voltages where the mixers are typically biased. The bias voltage dependence of the noise shows structure which is associated with resonances in the RF embedding circuit. Surprisingly, we find that changes in the high-frequency (100 GHz) impedance presented to the junction can dramatically affect the magnitude and voltage dependence of the low-frequency (1.5 GHz) noise. This emphasizes the necessity of very closely matching the junction to free space over a wide frequency range.<>
Sponsorship	IEEE Microwave Theory and Techniques Society
Starting Page	977
Ending Page	983
Page Count	7
File Size	764147
File Format	PDF
ISSN	00189480
Volume Number	43
Issue Number	4
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1995-04-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Noise measurement Circuit noise Low-frequency noise Niobium Power measurement Frequency measurement L-band Predictive models Low voltage Resonance
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electrical and Electronic Engineering Radiation

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Josephson effect gain and noise in SIS mixers

A compact and low-phase-noise Ka-band pHEMT-based VCO

A wideband fixed-tuned SIS receiver for 200-GHz operation

Low-noise 0.8-0.96- and 0.96-1.12-THz superconductor-insulator-superconductor mixers for the herschel space observatory

Compact monolithic integrated resistive mixers with low distortion for HIPERLAN

A Low-Noise $K$-Band VCO Based on Room-Temperature Ferroelectric Varactors

Design of a Low-Voltage and Low-Distortion Mixer Through Volterra-Series Analysis

Two-junction tuning circuits for submillimeter SIS mixers

Conversion gain and noise of niobium superconducting hot-electron-mixers

Measurements of noise in Josephson-effect mixers

Similar Documents

Josephson effect gain and noise in SIS mixers

A compact and low-phase-noise Ka-band pHEMT-based VCO

A wideband fixed-tuned SIS receiver for 200-GHz operation

Low-noise 0.8-0.96- and 0.96-1.12-THz superconductor-insulator-superconductor mixers for the herschel space observatory

Compact monolithic integrated resistive mixers with low distortion for HIPERLAN

A Low-Noise $K$-Band VCO Based on Room-Temperature Ferroelectric Varactors

Design of a Low-Voltage and Low-Distortion Mixer Through Volterra-Series Analysis

Two-junction tuning circuits for submillimeter SIS mixers

Conversion gain and noise of niobium superconducting hot-electron-mixers

Measurements of noise in Josephson-effect mixers