Title :
Mixed combline and He11 mode dielectric resonator filter with improved spurious performance
Author :
Weily, Andrew R. ; Mohan, Ananda S.
Author_Institution :
Fac. of Eng., Univ. of Technol., Sydney, NSW, Australia
Abstract :
A novel mixed resonator filter structure is presented which consists of a combination of combline resonators and the HE11 mode DR loaded rectangular cavity for obtaining an improved spurious response performance. The resonator structures are analysed using a parallel FD-TD method coupled with digital filtering and the matrix pencil method. The computed resonant frequencies for both the resonators compare well with measured results. The accuracy of the matrix pencil method is compared with the MUSIC algorithm for the prediction of resonant frequencies from FDTD data. A slot-coupled 3-pole filter composed of mixed combline and HE11 mode resonators is designed and constructed and the measured results indicate the usefulness of the new configuration
Keywords :
UHF filters; cavity resonators; dielectric resonators; finite difference time-domain analysis; passive filters; resonator filters; DR loaded rectangular cavity; He11 mode dielectric resonator; combline resonators; computed resonant frequencies; digital filtering; matrix pencil method; mixed combline/He11 mode DR filter; parallel FDTD method; slot-coupled 3-pole filter; spurious performance improvement; Digital filters; Filtering; Finite difference methods; Frequency measurement; Helium; Multiple signal classification; Prediction algorithms; Resonant frequency; Resonator filters; Time domain analysis;
Conference_Titel :
Microwave Conference Proceedings, 1997. APMC '97, 1997 Asia-Pacific
Print_ISBN :
962-442-117-X
DOI :
10.1109/APMC.1997.654664
