A dual-beam lens-free slot-array antenna coupled high-Tc superconducting fundamental mixer at the W-band

Gao, X; Zhang, T; Du, J; An, J; Bu, X; Guo, J

A dual-beam lens-free slot-array antenna coupled high-Tc superconducting fundamental mixer at the W-band

Gao, X Zhang, T

Du, J An, J Bu, X Guo, J

Permalink

Publisher:: IOP Publishing Ltd
Publication Type:: Journal Article
Citation:: Superconductor Science and Technology, 2021, 34, (12)
Issue Date:: 2021-12-01

Open Access

Copyright Clearance Process

Recently Added
In Progress
Open Access

This item is open access.

Adobe PDF

Download Accepted versionAdobe PDF (1.19 MB)

View on publisher's site

View statistics

Full metadata record

Field	Value	Language
dc.contributor.author	Gao, X
dc.contributor.author	Zhang, T https://orcid.org/0000-0001-6436-125X
dc.contributor.author	Du, J
dc.contributor.author	An, J
dc.contributor.author	Bu, X
dc.contributor.author	Guo, J
dc.date.accessioned	2022-05-26T00:22:58Z
dc.date.available	2022-05-26T00:22:58Z
dc.date.issued	2021-12-01
dc.identifier.citation	Superconductor Science and Technology, 2021, 34, (12)
dc.identifier.issn	0953-2048
dc.identifier.issn	1361-6668
dc.identifier.uri	http://hdl.handle.net/10453/157703
dc.description.abstract	This paper presents a W-band high-Tc superconducting (HTS) Josephson-junction fundamental mixer which is coupled using a dual-beam lens-free slot-array antenna. The antenna features a uniplanar six-element slot array fed by an ungrounded coplanar waveguide line, of which each element is a long slot loaded by four rectangular loops. Highly directional radiation is therefore realized by utilizing the long slots and array synthesis to form a relatively large antenna aperture. The antenna also enables asymmetric dual-beam radiation in opposite directions, which not only reduces the RF coupling losses but greatly facilitates the quasi-optics design for the integration of the HTS mixer into a cryocooler. The electromagnetic simulations show that a coupling efficiency as high as -2.2 dB, a realized gain of 13 dB and a front-to-back ratio of 10 dB are achieved at the frequency of 84 GHz. Using this on-chip antenna, a W-band HTS fundamental mixer module is experimentally developed and characterized for different operating temperatures. The measured conversion gain is -10 dB at 20 K and -14.6 dB at 40 K, respectively. The mixer noise temperature is predicted to be around 780 K at 20 K and 1600 K at 40 K, respectively. It is also analyzed that the mixer performance can be further improved if the Josephson junction parameters were optimized.
dc.language	English
dc.publisher	IOP Publishing Ltd
dc.relation.ispartof	Superconductor Science and Technology
dc.relation.isbasedon	10.1088/1361-6668/ac30d3
dc.rights	info:eu-repo/semantics/openAccess
dc.subject	0204 Condensed Matter Physics, 0906 Electrical and Electronic Engineering, 0912 Materials Engineering
dc.subject.classification	General Physics
dc.title	A dual-beam lens-free slot-array antenna coupled high-Tc superconducting fundamental mixer at the W-band
dc.type	Journal Article
utslib.citation.volume	34
utslib.for	0204 Condensed Matter Physics
utslib.for	0906 Electrical and Electronic Engineering
utslib.for	0912 Materials Engineering
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Strength - GBDTC - Global Big Data Technologies
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Electrical and Data Engineering
utslib.copyright.status	open_access	*
dc.date.updated	2022-05-26T00:22:56Z
pubs.issue	12
pubs.publication-status	Published
pubs.volume	34
utslib.citation.issue	12

Abstract:

This paper presents a W-band high-Tc superconducting (HTS) Josephson-junction fundamental mixer which is coupled using a dual-beam lens-free slot-array antenna. The antenna features a uniplanar six-element slot array fed by an ungrounded coplanar waveguide line, of which each element is a long slot loaded by four rectangular loops. Highly directional radiation is therefore realized by utilizing the long slots and array synthesis to form a relatively large antenna aperture. The antenna also enables asymmetric dual-beam radiation in opposite directions, which not only reduces the RF coupling losses but greatly facilitates the quasi-optics design for the integration of the HTS mixer into a cryocooler. The electromagnetic simulations show that a coupling efficiency as high as -2.2 dB, a realized gain of 13 dB and a front-to-back ratio of 10 dB are achieved at the frequency of 84 GHz. Using this on-chip antenna, a W-band HTS fundamental mixer module is experimentally developed and characterized for different operating temperatures. The measured conversion gain is -10 dB at 20 K and -14.6 dB at 40 K, respectively. The mixer noise temperature is predicted to be around 780 K at 20 K and 1600 K at 40 K, respectively. It is also analyzed that the mixer performance can be further improved if the Josephson junction parameters were optimized.

Please use this identifier to cite or link to this item:

http://hdl.handle.net/10453/157703