IEICE Electronics Express
Online ISSN : 1349-2543
ISSN-L : 1349-2543
Compact in-line triplet SIW bandpass filter using etched GCPW line resonator
Ji DingTao ZhangJianfeng Li
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2016 Volume 13 Issue 4 Pages 20151120


This paper presents a novel compact in-line triplet substrate integrated waveguide (SIW) bandpass filter. The filter is composed of two SIW cavity resonators and an etched one-half wavelength grounded coplanar waveguide (GCPW) line resonator. The GCPW line resonator is etched between two SIW cavity resonators to obtain more compact size. A transmission zero on the upper stopband is created by the cross coupling, which allows the filter implementation in in-line with sharp upper cut-off skirts. Finally, a compact third-order 15 dB return loss filter with a fractional bandwidth (FBW) of 7% at 5.5 GHz is designed, fabricated and measured. The experimental results show good agreement between the simulated and measured results.

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© 2016 by The Institute of Electronics, Information and Communication Engineers
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