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dc.contributor.authorChi, Chun-Hsiangen_US
dc.contributor.authorChang, Chi-Yangen_US
dc.date.accessioned2014-12-08T15:14:07Z-
dc.date.available2014-12-08T15:14:07Z-
dc.date.issued2007en_US
dc.identifier.isbn978-2-87487-001-9en_US
dc.identifier.urihttp://hdl.handle.net/11536/10833-
dc.description.abstractThis paper proposes a stepped-impedance wideband 180 degrees hybrid ring coupler with a novel frequency-independent 180 degrees phase inverter implemented by interdigital coplanar strip (CTS). Simple design equations for stepped-impedance lines and design curves for CTS/interdigital CTS are also presented. Due to the combination of a stepped-impedance structure and an ideal phase inverter, the proposed hybrid achieves size reduction, wide bandwidth, and excellent phase and amplitude performance. The size of this hybrid is about 13% of the conventional one. Experimental results show that this hybrid ring coupler centered at 2 GHz has a 10-dB return loss bandwidth of 97.5% from 0.98 to 2.93 GHz with 0.5 dB amplitude imbalance and 30 phase imbalance for both out-of-phase and in-phase operation. Its isolation is better than 30 dB from 0.5 to 4 GHz.en_US
dc.language.isoen_USen_US
dc.titleA compact wideband 180 degrees hybrid ring coupler using a novel interdigital CPS inverteren_US
dc.typeProceedings Paperen_US
dc.identifier.journal2007 EUROPEAN MICROWAVE CONFERENCE, VOLS 1-4en_US
dc.citation.spage548en_US
dc.citation.epage551en_US
dc.contributor.department電信工程研究所zh_TW
dc.contributor.departmentInstitute of Communications Engineeringen_US
dc.identifier.wosnumberWOS:000255921400140-
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