Rigorous analysis of effect of input-output direct coupling on triple-mode third-order Chebyshev bandpass filter

Author

Chua, Lye Heng ; Mirshekar-Syahkal, Dariush

Author_Institution

Dept. of Electron. Syst. Eng., Essex Univ., Colchester, UK

Volume

1

fYear

2003

fDate

7-9 Oct. 2003

Firstpage

179

Abstract

An equivalent circuit for the triple-mode third-order Chebyshev response filter is proposed which includes the direct-coupling between the input and output ports. Based on this structure, the existence of a transmission zero for the filter is established through mathematical expressions derived for the computation of the zero. To verify the accuracy of the theoretical transmission zero, a triple-mode Chebyshev filter with a centre frequency at 1.713 GHz and bandwidth of 60 MHz, is designed and implemented, using a dielectric loaded cubical cavity resonator. Very close agreement between the computed and measured results of the filter is achieved.

Keywords

Chebyshev filters; UHF filters; band-pass filters; dielectric resonator filters; electromagnetic coupling; equivalent circuits; poles and zeros; 1.713 GHz; 60 MHz; centre frequency; dielectric loaded cubical cavity resonator; direct input-output ports coupling; equivalent circuit; filter bandwidth; input-output direct coupling effect analysis; mathematical expressions; transmission zero computation; triple-mode third-order Chebyshev bandpass filter; Band pass filters; Bandwidth; Cavity resonators; Chebyshev approximation; Coupling circuits; Dielectrics; Equivalent circuits; Filtering theory; Frequency; Resonator filters;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference, 2003. 33rd European

Print_ISBN

1-58053-834-7

Type

conf

DOI

10.1109/EUMC.2003.1262247

Filename

1262247