Title :
Dual-mode filters for cellular base stations using metallized dielectric resonators
Author :
Fumagalli, Matteo ; Macchiarella, G. ; Resnati, G.
Author_Institution :
FOREM S.r.l., Agrate Brianza, Italy
Abstract :
A novel configuration for dual-mode filters employing dielectric ring resonators is presented. The coupling between two orthogonal polarized modes (HEM/sub 11/) within each dielectric ring is realized through a rectangular metallic strip deposited on the boundary of the ring (inner or outer). The coupling coefficient so obtained is large enough to allow the realization of high selectivity filters for cellular radio base stations. A 4 resonators test filter has been designed and realized using the novel resonators: the performances obtained are reported in the paper.
Keywords :
UHF filters; cellular radio; dielectric resonator filters; passive filters; HEM/sub 11/ mode; cellular base stations; coupling coefficient; dielectric ring resonators; dual-mode filters; high selectivity filters; metallized dielectric resonators; orthogonal polarized modes; radio base stations; rectangular metallic strip; Base stations; Dielectrics; Land mobile radio cellular systems; Metallization; Optical ring resonators; Performance evaluation; Polarization; Resonator filters; Strips; Testing;
Conference_Titel :
Microwave Symposium Digest, 2001 IEEE MTT-S International
Conference_Location :
Phoenix, AZ, USA
Print_ISBN :
0-7803-6538-0
DOI :
10.1109/MWSYM.2001.967256