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Design and performance of novel printed-circuit spurline bandpass filters

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1 Author(s)
Nguyen, C. ; Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA

Novel spurline bandpass filters are presented. Approximate design equations are derived. Two microstrip spurline bandpass filters employing two- and three-conductor spurline resonators, with passbands centered near 5 GHz, have been designed and tested with less than 1- and 1.3-dB insertion losses and more than 20- and 15-dB return losses in the passbands, respectively. Good agreement between the measured and calculated results has been observed. The filters behave very similar to the conventional open-circuited shunt-stub bandpass filters, but are more compact and less radiative, sensitive to the adjacent objects, and dispersive, making them more attractive.<>

Published in:

Microwave and Guided Wave Letters, IEEE  (Volume:2 ,  Issue: 11 )