A wide stopband CPW low pass filter using quarter wavelength stepped impedance resonators

Author

Lin, Hao-Jia ; Chen, Xiao-Qun ; Shi, Xiao-Wei ; Chen, Lei ; Bai, Yan-Fu

Author_Institution

Nat. Key Lab. of Sci. & Technol. on Antennas & Microwaves, Xidian Univ., Xi´´an, China

fYear

2010

fDate

8-11 May 2010

Firstpage

62

Lastpage

65

Abstract

A novel wide stopband coplanar waveguide (CPW) low pass filter (LPF) using quarter wavelength stepped impedance resonators (SIR) is presented. The bandstop characteristics of the quarter wavelength short circuited stubs SIR are demonstrated. By cascading three tapered quarter wavelength short circuited stubs SIR and a CPW spurline resonator, the fabricated low pass filter has sharp rejection with cutoff frequency of 3.5 GHz, and deep attenuation from 3.7 GHz to 11 GHz lower than -24 dB. Good agreement between simulated and measured results is demonstrated.

Keywords

band-stop filters; coplanar waveguides; electric impedance; low-pass filters; microwave filters; resonator filters; CPW spurline resonator; bandstop characteristics; coplanar waveguide; fabricated low pass filter; frequency 3.5 GHz; frequency 3.7 GHz to 11 GHz; quarter wavelength stepped impedance resonator; tapered quarter wavelength short circuited stubs SIR; wide stopband CPW low pass filter; Attenuation; Circuit simulation; Coplanar waveguides; Electromagnetic waveguides; Frequency; Impedance; Low pass filters; Periodic structures; Spurline; Wavelength measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave and Millimeter Wave Technology (ICMMT), 2010 International Conference on

Conference_Location

Chengdu

Print_ISBN

978-1-4244-5705-2

Type

conf

DOI

10.1109/ICMMT.2010.5525289

Filename

5525289