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International Journal of Antennas and Propagation
Volume 2015, Article ID 969035, 7 pages
http://dx.doi.org/10.1155/2015/969035
Research Article

A Bandpass Filter Based on Half Mode Substrate Integrated Waveguide-to-Defected Ground Structure Cells

School of Communication and Information Engineering, University of Electronics Science and Technology of China, Chengdu 611731, China

Received 22 March 2014; Accepted 14 August 2014

Academic Editor: Francisco Falcone

Copyright © 2015 Yong Mao Huang 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.

Abstract

A half mode substrate integrated waveguide-to-defected ground structure (HMSIW-DGS) cell and its embedded form are proposed to miniaturize a bandpass filter. Both cells can purchase wideband frequency response and low insertion loss, as well as simple and easy fabrication. By cascading two of them according to design requirement, an X-band bandpass filter is designed and measured to meet compact size, low insertion loss, good return loss, second harmonic suppression, and linear phase.