A Compact Tunable Directional Coupler with Continuously Tuned Differential Phase

Zhu, H; Abbosh, AM

A Compact Tunable Directional Coupler with Continuously Tuned Differential Phase

Zhu, H

Abbosh, AM

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Publication Type:: Journal Article
Citation:: IEEE Microwave and Wireless Components Letters, 2018, 28 (1), pp. 19 - 21
Issue Date:: 2018-01-01

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Field	Value	Language
dc.contributor.author	Zhu, H https://orcid.org/0000-0002-5157-8457	en_US
dc.contributor.author	Abbosh, AM	en_US
dc.date.issued	2018-01-01	en_US
dc.identifier.citation	IEEE Microwave and Wireless Components Letters, 2018, 28 (1), pp. 19 - 21	en_US
dc.identifier.issn	1531-1309	en_US
dc.identifier.uri	http://hdl.handle.net/10453/123125
dc.description.abstract	© 2001-2012 IEEE. A tunable directional coupler with outputs that have continuously tuned phase difference and constant magnitude is presented. The initial design is based on a 3-dB branch-line coupler with two arms having variable electrical lengths. To realize the variable-length lines, a novel concept of tunable phase shifting unit, which includes a pair of inductor-varactor loaded coupled lines, is proposed. By controlling the shifting phase of the two arms, the differential phase (i.e., the phase difference between the two output ports) can be tuned continuously. Explicit relation between the objective differential phase of the device and the required shifting phase of those units is analyzed and explained. To validate the design, a prototype is built, simulated, and tested. The experimental and predicted results agree well and show that the device can realize arbitrary and continuously tunable differential phase from 45° to 135°. The overall size of the design is only 0.18 λ{g} \times 0.24 λ{g} , which is extremely compact compared with using a cascaded coupler-phase shifters and is thus suitable for miniaturized wireless systems.	en_US
dc.relation.ispartof	IEEE Microwave and Wireless Components Letters	en_US
dc.relation.isbasedon	10.1109/LMWC.2017.2779819	en_US
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject.classification	Networking & Telecommunications	en_US
dc.title	A Compact Tunable Directional Coupler with Continuously Tuned Differential Phase	en_US
dc.type	Journal Article
utslib.citation.volume	1	en_US
utslib.citation.volume	28	en_US
utslib.for	0906 Electrical and Electronic Engineering	en_US
utslib.for	1005 Communications Technologies	en_US
utslib.for	0205 Optical Physics	en_US
pubs.embargo.period	Not known	en_US
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/Faculty of Engineering and Information Technology/School of Electrical and Data Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - GBDTC - Global Big Data Technologies
utslib.copyright.status	closed_access	*
pubs.issue	1	en_US
pubs.publication-status	Published	en_US
pubs.volume	28	en_US

Abstract:

© 2001-2012 IEEE. A tunable directional coupler with outputs that have continuously tuned phase difference and constant magnitude is presented. The initial design is based on a 3-dB branch-line coupler with two arms having variable electrical lengths. To realize the variable-length lines, a novel concept of tunable phase shifting unit, which includes a pair of inductor-varactor loaded coupled lines, is proposed. By controlling the shifting phase of the two arms, the differential phase (i.e., the phase difference between the two output ports) can be tuned continuously. Explicit relation between the objective differential phase of the device and the required shifting phase of those units is analyzed and explained. To validate the design, a prototype is built, simulated, and tested. The experimental and predicted results agree well and show that the device can realize arbitrary and continuously tunable differential phase from 45° to 135°. The overall size of the design is only 0.18 λ{g} \times 0.24 λ{g} , which is extremely compact compared with using a cascaded coupler-phase shifters and is thus suitable for miniaturized wireless systems.

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http://hdl.handle.net/10453/123125