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International Journal of Antennas and Propagation
Volume 2016, Article ID 1940850, 7 pages
http://dx.doi.org/10.1155/2016/1940850
Research Article

A Compact High-Pass Filter Using Hybrid Microstrip/Nonuniform CPW with Dual-Mode Resonant Response

1School of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China
2School of Communication and Information Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China

Received 1 April 2016; Revised 12 August 2016; Accepted 21 August 2016

Academic Editor: Paolo Baccarelli

Copyright © 2016 Hui Chen 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 novel and miniature high-pass filter (HPF) based on a hybrid-coupled microstrip/nonuniform coplanar waveguide (CPW) resonator is proposed in this article, in which the designed CPW has exhibited a wideband dual-mode characteristic within the desired high-pass frequency range. The implemented filter consists of the top microstrip coupled patches and the bottom modified nonuniformly short-circuited CPW resonator. Simulated results from the electromagnetic (EM) analysis software and measured results from a vector network analyzer (VNA) show a good agreement. A designed and fabricated prototype filter having a 3 dB cutoff frequency () of 5.78 GHz has shown an ultrawide high-pass behavior, which exhibits the highest passband frequency exceeding 4. under the minimum insertion loss (IL) 0.75 dB. The printed circuit board (PCB) area of the filter is approximately , where is the guided wavelength at .