${\\rm TE}_{01\\delta }$ -Mode Dielectric-Resonator Filters With Controllable Transmission Zeros

Author

Qing-Xin Chu ; Xiao Ouyang ; Huan Wang ; Fu-Chang Chen

Author_Institution

Sch. of Electron. & Inf. Eng., South China Univ. of Technol., Guangzhou, China

Volume

61

Issue

3

fYear

2013

fDate

Mar-13

Firstpage

1086

Lastpage

1094

Abstract

A method to design TE_01δ-mode dielectric-resonator (DR) filters with transmission zeros is proposed. The feeding probes, extended along ring DRs, are used to excite the TE_01δ mode and introduce transmission zeros. By rotating the angle of the feeding position, transmission zeros can be shifted to the lower or the upper stopband. Thus, TE_01δ-mode DR filters with quasi-elliptic responses are realized with only iris coupling components. Based on this method, second- and fourth-order filters with different responses are designed and fabricated. Measured results confirm the predicted performance.

Keywords

dielectric resonator filters; TE_01δ-mode DR filters; TE_01δ-mode dielectric-resonator filter design; feeding position; feeding probes; fourth-order filter; iris coupling component; quasielliptic responses; second-order filter; transmission zeros; Cavity resonators; Couplings; Dielectrics; Filtering theory; Iris; Probes; Tuning; ${rm TE}_{01delta}$ mode; Angle of feeding position; bandpass filters; dielectric resonators (DRs); transmission zeros;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/TMTT.2013.2238551

Filename

6412740