Quarter-Wavelength Stepped-Impedance Resonator Filter With Mixed Electric and Magnetic Coupling

Author

Fang Zhu ; Wei Hong ; Ji-Xin Chen ; Ke Wu

Author_Institution

State Key Lab. of Millimeter Waves, Southeast Univ., Nanjing, China

Volume

24

Issue

2

fYear

2014

fDate

Feb. 2014

Firstpage

90

Lastpage

92

Abstract

This letter proposes a new type of microstrip quarter-wavelength stepped-impedance resonator (SIR) filter with controllable mixed electric and magnetic coupling. A conducting pin and an open gap between two coupled SIRs are jointly used to create the mixed coupling, and the electric and magnetic coupling can be separately controlled by adjusting the spacing between the gap and the position of the conducting pin. Based on the proposed structure, a second-order filter and a third-order filter are designed and fabricated. Good agreement between the measured and simulated data is obtained.

Keywords

microstrip filters; resonator filters; conducting pin; microstrip quarter-wavelength stepped-impedance resonator filter; mixed electric-magnetic coupling; open gap; quarter-wavelength stepped-impedance resonator filter; second-order filter; third-order filter; Couplings; Magnetic resonance; Magnetic separation; Microstrip; Microwave filters; Resonator filters; Bandpass filter (BPF); mixed-coupling; stepped-impedance resonator (SIR); transmission zero (TZ);

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2013.2290225

Filename

6678322