A filter synthesis method for quasi-elliptic dual-passband filters

This paper presents a new synthesis method for the quasi-elliptic LC prototype of multi-passband filter. The optimized poles and zeros satisfying the required multi-passband filter response are achieved by optimized algorithm. Transfer and reflection functions were also calculated. Using the roots o...

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Bibliographic Details
Main Authors: Hyesun Lee, Jahyeon Lee, Yeongseog Lim
Format: Conference Proceeding
Language:English
Subjects:
Band pass filters
Filter synthesis
Filtering theory
Microwave filters
multi-passband prototype
Passband
Poles and zeros
Prototypes
quasi-elliptic filter
quasi-lumped element
Resonator filters
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Summary:This paper presents a new synthesis method for the quasi-elliptic LC prototype of multi-passband filter. The optimized poles and zeros satisfying the required multi-passband filter response are achieved by optimized algorithm. Transfer and reflection functions were also calculated. Using the roots of these functions, the quasi-elliptic LC prototype was synthesized. To verify the proposed synthesis method, a dual-passband filter operating at GSM(880~960 MHz) and ISM(2400~2500 MHz) was designed and fabricated. The measured frequency response shows good agreement with the theoretical and simulated ones.
ISSN:2165-4727
2165-4743