Compact CPW-fed combline filter in substrate integrated waveguide technology

“© © 20xx IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.” In this letter, the design and experimental results of compact low loss combline filters, based on the extension of the classical coaxial waveguide resonator to Substrate Integrated Waveguide (SIW) technology, are succesfully demonstrated. A three-pole 5% FBW Chebyshev filter has been designed, fabricated and measured. The fabricated device shows an excellent agreement with simulated results. These structures keep the low-cost fabrication scheme of single-layer PCB processing, while requiring less than half the area compared to a conventional SIW design. Manuscript received September 07, 2011; accepted October 20, 2011. Date of publication December 16, 2011; date of current version January 11, 2012. This work was supported by Generalitat Valenciana and MICINN (Spanish Government) under projects GV/2009/007 and TEC2010-21520-C04-01. Martínez Pérez, JD.; Sirci, S.; Taroncher Calduch, M.; Boria Esbert, VE. (2012). Compact CPW-fed combline filter in substrate integrated waveguide technology. IEEE Microwave and Wireless Components Letters. 22(1):7-9. https://doi.org/10.1109/LMWC.2011.2174215