Design of Multi-Band Filters Using Parallel Connected Topology
Sovuthy Cheab, P. W. Wong, Socheatra Soeung · Radioengineering · 2018
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.