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The Scientific World Journal
Volume 2013, Article ID 402539, 4 pages
Research Article

Compact Ultra Wide Band Microstrip Bandpass Filter Based on Multiple-Mode Resonator and Modified Complementary Split Ring Resonator

1R&D Department, Tafco Metawireless, Polıgono Plazaola, 31195 Aizoain, Spain
2Electrical Engineering Departament, Universidad Publica de Navarra, Campus Arrosadıa, 31006 Pamplona, Spain

Received 20 August 2013; Accepted 26 September 2013

Academic Editors: D. S. Budimir and Y.-S. Lin

Copyright © 2013 J. Antonio Marcotegui et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A new class of broadband microstrip filters for Ultra Wide Band (UWB) applications is proposed. In the design, different stages of parallel-coupled microstrip line and other stages with a Modified Complementary Split Ring Resonator (MCSRR)—a concept proposed here for the first time—are adjusted to obtain the desired response with broadband, sharp rejection, low insertion loss, and low return loss. Full wave simulation results as well as measurement results from fabricated prototypes are presented, showing good agreement. The proposed technique offers a new alternative to implement low-cost high-performance filter devices, applicable to a wide range of communication systems.