Design of a compact filter-antenna using DGS structure for modern wireless communication systems

Author

Weijun Wu ; Chun Wang ; Xuefeng Wang ; Qifeng Liu

Author_Institution

Sci. & Technol. on Electromagn. Compatibility Lab., China Ship Dev. & Design Center, Wuhan, China

fYear

2013

fDate

29-31 Oct. 2013

Firstpage

355

Lastpage

358

Abstract

A compact filter-antenna for modern wireless communication systems is designed in this letter. The filter-antenna comprises a microstrip square open-loop resonator, a DGS square open-loop resonator, a coupled line, and a Γ-shaped antenna. The Γ-shaped antenna is excited by a coupled line that is treated as the admittance inverter in filter design, which performs not only a radiator, but also the last resonator of the bandpass filter. Therefore, near-zero transition loss is achieved between the filter and the antenna. Measured results show that the filter-antenna achieves an impedance bandwidth of 23.7% (2.25-2.855GHz) at a reflection coefficient S11<;-10 dB.

Keywords

antennas; band-pass filters; microstrip resonators; radiocommunication; Γ-shaped antenna; DGS square open-loop resonator; DGS structure; admittance inverter; bandpass filter; compact filter-antenna; coupled line; filter design; frequency 2.25 GHz to 2.855 GHz; microstrip square open-loop resonator; near-zero transition loss; wireless communication systems; Band-pass filters; Filtering theory; Microstrip antennas; Microstrip filters; Microwave filters; Resonator filters; Γ -shaped antenna; DGS; filter-antenna; square open-loop resonator;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications (MAPE), 2013 IEEE 5th International Symposium on

Conference_Location

Chengdu

Print_ISBN

978-1-4673-6077-7

Type

conf

DOI

10.1109/MAPE.2013.6689820

Filename

6689820