Title :
Bottom Coupling of Combline Resonators for Hybrid Dielectric / Air-Cavity Bandpass Filters
Author_Institution :
Panasonic Electron. Devices, Commun. Lab. of Eur. Technol. Center, Lueneburg
Abstract :
A base-station bandpass filter using different kinds of resonators is presented. A novel hybrid coupling between TE-mode dielectric and air-cavity combline resonators is introduced. The combline resonators are coupled with an aperture at the bottom wall to achieve a compact layout of the filter. The bandpass filter consists of 7 resonators, has a center-frequency of 2.0175 GHz, a bandwidth of 15 MHz and cross-coupling by a cascaded quadruplet for improved blocking performance. Different temperature compensation techniques need to be applied for both types of resonators to guarantee stable performance in the temperature range from -40degC to 75degC. The layout is discussed. Furthermore, measurement results are shown
Keywords :
UHF filters; band-pass filters; cavity resonator filters; comb filters; compensation; dielectric resonator filters; -40 to 75 C; 15 MHz; 2.0175 GHz; TE-mode dielectric combline resonators; UHF filters; air-cavity bandpass filters; air-cavity combline resonators; base-station bandpass filter; cascaded quadruplet; hybrid coupling; hybrid dielectric bandpass filters; temperature compensation techniques; Apertures; Band pass filters; Couplings; Dielectric losses; Magnetic field measurement; Magnetic separation; Microwave devices; Resonator filters; Temperature distribution; Tuning;
Conference_Titel :
Microwave Conference, 2006. 36th European
Conference_Location :
Manchester
Print_ISBN :
2-9600551-6-0
DOI :
10.1109/EUMC.2006.281259
