C. Wang et al., MIXED-MODES CYLINDRICAL PLANAR DIELECTRIC RESONATOR FILTERS WITH RECTANGULAR ENCLOSURE, IEEE transactions on microwave theory and techniques, 43(12), 1995, pp. 2817-2823
A compact mixed modes cylindrical planar dielectric resonator filter i
n a rectangular enclosure is presented. Space coupling between the res
onators excited in different modes and iris coupling between the ident
ical resonators are realized in the filter. All the couplings and reso
nant frequencies of the DR cavities are computed by a rigorous full wa
ve mode matching method and a cascading procedure using generalized sc
attering matrices. A 6-pole elliptic function filter is designed and c
onstructed, and the measured filter frequency responses verify the the
ory.