A modern bandpass microstrip filter with spurious response suppression and size reduction

Author

Simon, Andrew ; Yaw, Lim

Author_Institution

Agilent Technol. Sdn Bhd, Bayan Lepas FIZ Phase III, Penang

fYear

2007

fDate

4-6 Dec. 2007

Firstpage

1

Lastpage

5

Abstract

In this paper, a modern bandpass filter using a capacitively stepped impedance resonator (CSIR) is examined using analytical formulations to design a filter in the S-band for spurious frequency relocation and size reduction. A prototype filter is designed at 3.35 GHz with significant spurious suppression up to 31 and 23-dB at frequencies 6.70 and 10.05 GHz respectively. A circuit size reduction of about 40% is achieved when compared to a hair-pin filter and more than 86% when compared to an edge-coupled bandpass filter configuration with comparable passband performance and superior out-of-band suppression.

Keywords

band-pass filters; microstrip filters; resonator filters; S-band filter; bandpass filter; capacitively stepped impedance resonator; circuit size reduction; edge-coupled filter; frequency 3.35 GHz; frequency 6.70 GHz to 10.05 GHz; microstrip filter; out-of-band suppression; response suppression; size reduction; spurious frequency relocation; spurious suppression; Band pass filters; Electromagnetic coupling; Frequency; Impedance; Microstrip filters; Microstrip resonators; Microwave filters; Prototypes; Resonator filters; Transmission line theory; Bandpass filter; CSIR - Capacitively Stepped Impedance Resonator; Dual mode resonator;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Electromagnetics, 2007. APACE 2007. Asia-Pacific Conference on

Conference_Location

Melaka

Print_ISBN

978-1-4244-1434-5

Electronic_ISBN

978-1-4244-1435-2

Type

conf

DOI

10.1109/APACE.2007.4603860

Filename

4603860