Frequency transform synthesis method for cross-coupled resonator bandpass filters

Author

Wang, Xiyuan ; Di, Yingjie ; Gardner, Peter ; Ghafouri-Shiraz, H.

Author_Institution

Dept. of Electron., Peking Univ., Beijing, China

Volume

15

Issue

8

fYear

2005

Firstpage

533

Lastpage

535

Abstract

In this letter, an improved synthesis method for equal-ripple cross-coupled resonator bandpass filter is proposed based on the frequency transform method and Atia´s method. In this method, the conventional lowpass prototype method is revised by replacing the low pass prototype with the frequency transform method. The detailed element extraction procedure in z-domain is given. Also the coupling matrix reduction implemented by optimization algorithm is described. This method is powerful for filter synthesis with asymmetric frequency response and complex transmission zeros. The design examples are presented and the experimental results validate its effectiveness.

Keywords

band-pass filters; frequency response; frequency-domain analysis; frequency-domain synthesis; optimisation; resonator filters; Atia method; asymmetric frequency response; bandpass filter synthesis; bandpass filters; complex transmission zeros; coupling matrix reduction; cross-coupled resonator; element extraction; frequency transform method; lowpass prototype method; Band pass filters; Circuit synthesis; Coupling circuits; Filtering theory; Frequency response; Frequency synthesizers; Passband; Power engineering and energy; Prototypes; Resonator filters; Bandpass filter synthesis; cross-coupled resonator; frequency transform method;

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2005.852799

Filename

1471735