Miniaturized Paralleled-Coupled Microstrip Bandpass Filters with Spur-Line for Multi-Spurious Suppression

Author

Wang, Yu-Zhen ; Wang, Chia-An ; Lin, Kun-Ying

Author_Institution

Dept. of Comput. & Commun. Eng., Nan Kai Inst. of Technol., Chung Cheng

fYear

2007

fDate

11-14 Dec. 2007

Firstpage

1

Lastpage

4

Abstract

Two parallel-coupled bandpass filters with miniaturization and multi-spurious suppression were presented. The coupled stages of the filters were designed with back-to-back spur-line coupled sections. By adequately selecting the length of spur-line, an additional transmission zero can be created. Owing to the slow-wave effect of the spur-line and the over-coupled architecture for the coupled stages, both filters not only can realize size reduction of 53%, but also have spurious suppression up to 5.4f_o with 20 dB and 4.6f_o with 30 dB rejection levels, respectively.

Keywords

band-pass filters; microstrip filters; back-to-back spur-line coupled sections; miniaturized paralleled-coupled microstrip bandpass filters; multi-spurious suppression; over-coupled architecture; slow-wave effect; Band pass filters; Capacitance; Concurrent computing; Dielectric substrates; Electromagnetic coupling; Filtering theory; Frequency; Microstrip filters; Microwave filters; Microwave technology; multi-spurious; parallel; size reduction; spur-line; transmission zero;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference, 2007. APMC 2007. Asia-Pacific

Conference_Location

Bangkok

Print_ISBN

978-1-4244-0748-4

Electronic_ISBN

978-1-4244-0749-1

Type

conf

DOI

10.1109/APMC.2007.4554800

Filename

4554800