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The Scientific World Journal
Volume 2014, Article ID 238717, 12 pages
Research Article

Design of a Broadband Band-Pass Filter with Notch-Band Using New Models of Coupled Transmission Lines

1Department of Electrical Engineering, Dashtestan Branch, Islamic Azad University, Dashtestan, Iran
2Department of Electrical Engineering, Bushehr Branch, Islamic Azad University, Bushehr, Iran
3Faculty of Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
4Faculty of Electrical and Computer Engineering, K.N.Toosi University of Technology, Tehran, Iran

Received 27 March 2014; Revised 3 July 2014; Accepted 30 July 2014; Published 28 August 2014

Academic Editor: Soliman A. Mahmoud

Copyright © 2014 Navid Daryasafar 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.


We intend to design a broadband band-pass filter with notch-band, which uses coupled transmission lines in the structure, using new models of coupled transmission lines. In order to realize and present the new model, first, previous models will be simulated in the ADS program. Then, according to the change of their equations and consequently change of basic parameters of these models, optimization and dependency among these parameters and also their frequency response are attended and results of these changes in order to design a new filter are converged.