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2011-04-08

A Compact UWB Bandpass Filter with Improved Out-of-Band Performance Using Modified Coupling Structure

By Xu-Kun Tian and Qing-Xin Chu
Progress In Electromagnetics Research Letters, Vol. 22, 191-197, 2011
doi:10.2528/PIERL11022504

Abstract

A compact ultra-wideband (UWB) bandpass filter (BPF) with improved harmonic suppression using a modified coupling structure is presented in this paper. The modified coupling structure is constructed by taper-connecting two folded open stubs to the traditional parallel-coupled lines, which shows an improved characteristic in harmonic suppression. By integrating the proposed coupling and the stepped-impedance stub loaded resonator (SISLR), a UWB BPF is finally built and tested. The simulated and measured results are in good agreement with each other, exhibiting good wideband filtering characteristic and improved out-of-band performance.

Citation


Xu-Kun Tian and Qing-Xin Chu, "A Compact UWB Bandpass Filter with Improved Out-of-Band Performance Using Modified Coupling Structure," Progress In Electromagnetics Research Letters, Vol. 22, 191-197, 2011.
doi:10.2528/PIERL11022504
http://jpier.org/PIERL/pier.php?paper=11022504

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