Design of multi-band filters using parallel connected topology

• Main Authors: Cheab, S., Wong, P.W., Soeung, S.
• Format: Article
• Published: Czech Technical University 2018
• Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85045317046&doi=10.13164%2fre.2018.0186&partnerID=40&md5=ae673a47d42f3338dc8f79b782c96b9d; http://eprints.utp.edu.my/21643/

This paper presents the design of multi-band filters using parallel connected topology. The resonator in each branch is the dual-mode resonator which provides two resonant modes per passband for miniaturization. The coupling values of the resonator are obtained by mapping the filtering function of the dual-mode resonator to the second order Chebyshev polynomial. The control of the filter parameters, such as pass-band bandwidths and band separation, is addressed. Dual-band and triple-band filter prototypes are designed and fabricated to validate the proposed concept. The measured results show good agreement with the simulations. © 2009 Radioengineering.