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https://hdl.handle.net/11499/8149
Title: | Design of branch line coupler loaded capacitively with interdigitated fingers by using microstrip fed coplanar structures (L-shaped conductor backed asymmetric CPS and U-shaped conductor backed CPW) | Authors: | Karpuz, Ceyhun Öztürk, Pınar |
Keywords: | branch line coupler conductor backed asymmetric coplanar stripline conductor backed coplanar waveguide interdigital fingers slow wave structure Asymmetric coplanar striplines Branch line couplers Cell number Center frequency Conductor backed coplanar waveguides Conductor backed CPW Coplanar structure Even-odd mode analysis Experimental verification Interdigital Interdigitated fingers L-shaped Microstrip fed Microstrip transmission lines Propagation velocities Theoretical models Theoretical result U-shaped Unit cells Bandpass filters Miniature instruments Monolithic microwave integrated circuits Slow wave structures Waveguides Microstrip lines |
Abstract: | In this letter, L-shaped conductor backed asymmetric coplanar stripline (LSCBACPS) and U-shaped conductor backed coplanar waveguide (USCBCPW) branch line coupler fed by microstrip transmission line have been investigated for the miniaturization. The number of interdigital finger unit cells located at the branch and through lines of the conventional branch line coupler is used to provide a desired miniaturization. The proposed branch line couplers in which all ports are formed by microstrip line have been constructed in two different configurations depending on the placement of the capacitively loaded fingers. The effects of the change of the cell number located at the branch and through lines on the center frequency and the propagation velocity are investigated. These effects are expressed by a simple formula depends on the cell number to use in the theoretical model obtained from the even-odd mode analysis of LSCBACPS and USCBCPW configurations. Proposed couplers are designed, fabricated, and tested for the experimental verification to compare with the simulation and theoretical results. Measured, theoretical, and simulation results are in a very good agreement. © 2012 Wiley Periodicals, Inc. | URI: | https://hdl.handle.net/11499/8149 https://doi.org/10.1002/mop.27442 |
ISSN: | 0895-2477 |
Appears in Collections: | Mühendislik Fakültesi Koleksiyonu Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection |
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