A novel planar dual-band branch line coupler using defect ground structure

Author

You, Changjiang ; Zhu, Xiaowei

Author_Institution

State Key Lab of Millimeter Waves, Department of Radio Engineering, Southeast University, Nanjing, China 210096

fYear

2008

fDate

15-20 June 2008

Firstpage

1227

Lastpage

1230

Abstract

A novel planar coupler with Defect Ground Structure (DGS) is proposed for application to the dual-band operation. In the new design, two cross coupling branches are added to the conventional branch line coupler at the middle. They give more flexibility to design for dual-band application. Using the DGS, high impedance microstrip line is implemented easily and the electrical length of microstrip line increases. The two operation frequencies could be designed more closely using high impedance implemented by DGS. For verification purpose, a compact microstrip dual-band coupler applied for TD-SCDMA and WiMax operation was designed, fabricated and measured. Experimental results are in agreement with predicted values.

Keywords

Coupling circuits; Dual band; Etching; Frequency; Impedance; Inductance; Microstrip; Millimeter wave communication; Time division synchronous code division multiple access; WiMAX; Defect Ground Structure (DGS); branch line coupler; dual-band; microstrip line;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 2008 IEEE MTT-S International

Conference_Location

Atlanta, GA, USA

ISSN

0149-645X

Print_ISBN

978-1-4244-1780-3

Electronic_ISBN

0149-645X

Type

conf

DOI

10.1109/MWSYM.2008.4633280

Filename

4633280