Quasi-Arbitrary Phase-Difference Hybrid Coupler

Previous hybrid couplers have output phase difference that have either been 0 ° , 90 ° , or 180 ° . Other phase differences could only be realized using additional phase-shift elements. This increased circuit size and cost, and also degraded overall performance due to interconnecting mismatch losses...

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Veröffentlicht in:	IEEE transactions on microwave theory and techniques 2012-06, Vol.60 (6), p.1530-1539
Hauptverfasser:	Wong, Yuk Shing, Zheng, Shao Yong, Chan, Wing Shing
Format:	Artikel
Sprache:	eng
Schlagworte:	3-dB hybrid coupler Applied sciences Arbitrary phase characteristics Bandwidth Butler matrix Circuit properties Circuits Couplers Degradation Electric, optical and optoelectronic circuits Electronic equipment and fabrication. Passive components, printed wiring boards, connectics Electronics Equations Exact sciences and technology Impedance Joining Microwave circuits, microwave integrated circuits, microwave transmission lines, submillimeter wave circuits Microwaves Phase shift Phase shifters Phased arrays reflectometer
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Beschreibung
Zusammenfassung:	Previous hybrid couplers have output phase difference that have either been 0 ° , 90 ° , or 180 ° . Other phase differences could only be realized using additional phase-shift elements. This increased circuit size and cost, and also degraded overall performance due to interconnecting mismatch losses. The proposed uniplanar arbitrary phase-difference coupler eliminates these additional components, thereby maintaining small size and good performance. Theoretical analysis is presented here together with measured results for two microstrip couplers for verification.
ISSN:	0018-9480 1557-9670
DOI:	10.1109/TMTT.2012.2187918