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Novel reduced-size coplanar-waveguide bandpass filter using the new folded open stub structure

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4 Author(s)
Shry-Sann Liao ; RF Circuits Design Lab., Feng Chia Univ., Taichung, Taiwan ; Hsien-Ku Chen ; Yin-Cheng Chang ; Kun-Tai Li

Proposes a novel folded skill and a simpler method than that of older methods. The advantages of this new structure reveals a better skirt factor than that of the conventional folded /spl lambda//4 series open stub, and it reduces the folded area of the conventional structure by at least 50%. Besides, by using the new folded /spl lambda//4 open stub to realize a bandpass filter, the size of the circuit will be reduced greatly and achieve better stopband rejection.

Published in:

Microwave and Wireless Components Letters, IEEE  (Volume:12 ,  Issue: 12 )