IEICE Electronics Express
Online ISSN : 1349-2543
LETTER
Miniature dual-band filters using integrated bandpass and bandstop filters for wide bandwidths
Yun LiuWenbin Dou
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2009 Volume 6 Issue 10 Pages 618-622

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Abstract

This paper presents a novel microstrip dual-band filter in which a shunt-stub bandpass filter and an open-stub bandstop filter are integrated into a single structure of short length. The bandstop filter is centered within the passband of the bandpass filter, resulting in a filter having dual passbands. Good return loss is obtained using an optimization routine. This method is suitable for designing dual-band filters having wide bandwidths. Good agreement between theory and measurements in respect of low insertion loss and high isolation is demonstrated.

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© 2009 by The Institute of Electronics, Information and Communication Engineers
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