A compact quarter-wavelength stepped-impedance resonator bandpass filter with source-load coupling

Author

Jun Xu ; Wei Hong ; Zhe Chen

Author_Institution

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

fYear

2015

fDate

March 30 2015-April 1 2015

Firstpage

1

Lastpage

4

Abstract

In this paper, a compact quarter-wavelength stepped-impedance resonator bandpass filter is proposed, two extra transmission zeros are implemented by source-load coupling between the feedlines, a filter with two resonators is designed, each resonator consists of a low-Z section and a high-Z section, good performance is achieved both in passband and stopband. Demonstrator filter is designed on the Rogers RT/Duroid 5880 dielectric substrate, centered at 5.8GHz, and the BW is 400MHz. The measureted result shows that RL in passband is less than 15dB, and the minimal IL is 3.0dB. This filter occupies an area of 6.55mm×2.85mm. The demonstrator filter is fabricated, and good agreement between measurement and simulation is achieved.

Keywords

band-pass filters; resonator filters; Rogers RT Duroid 5880 dielectric substrate; bandwidth 400 MHz; compact quarter-wavelength stepped-impedance resonator bandpass filter; demonstrator filter; feedlines; frequency 5.8 GHz; high-Z section; low-Z section; source-load coupling; transmission zeros; Band-pass filters; Couplings; Filtering theory; Magnetic separation; Microstrip filters; Microwave filters; Resonator filters; Bandpass Filter; Source-load coupling; compact; stepped-impedance resonator; transmission zeros;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Symposium (IWS), 2015 IEEE International

Conference_Location

Shenzhen

Type

conf

DOI

10.1109/IEEE-IWS.2015.7164537

Filename

7164537