Compact MMIC CPW and asymmetric CPS branch-line couplers and wilkinson dividers using shunt and series stub loading
In: IEEE transactions on microwave theory and techniques, Jg. 53 (2005), Heft 5, S. 1624-1635
Online
academicJournal
- print, 31 ref
Zugriff:
Circuit size may be reduced by up to 60% by embedding series and shunt uniplanar stubs inside the main uniplanar line since this reuses physical space in the longitudinal direction. This size-efficient stub loading of the main uniplanar line results in robust options for designing compact K-band 90° hybrid couplers and Wilkinson dividers. The approach is confirmed by experimental results that agree well with theory up to at least 30 GHz using both coplanar waveguide (CPW) and asymmetric coplanar stripline (ACPS). Furthermore, these couplers and dividers do not use lumped inductors or capacitors and, consequently, have excellent design accuracy even at millimeter-wave frequencies. Additionally, it is shown that it is possible to design an ACPS 90° branch-line coupler without the conventional CPW quarter wavelength transformers used to match the input and output port characteristic impedances.
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Compact MMIC CPW and asymmetric CPS branch-line couplers and wilkinson dividers using shunt and series stub loading
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Autor/in / Beteiligte Person: | HETTAK, Khelifa ; MORIN, Gilbert A ; STUBBS, Malcolm G |
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Zeitschrift: | IEEE transactions on microwave theory and techniques, Jg. 53 (2005), Heft 5, S. 1624-1635 |
Veröffentlichung: | New York, NY: Institute of Electrical and Electronics Engineers, 2005 |
Medientyp: | academicJournal |
Umfang: | print, 31 ref |
ISSN: | 0018-9480 (print) |
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