Design and realization of a new compact branch-line coupler using defected ground structure

Author

Wang, Huaming ; Liu, Xueguang ; Cai, Wenfeng ; Cao, Hongfang

Author_Institution

Sch. of Electron. & Inf. Eng., Soochow Univ., Suzhou, China

fYear

2008

fDate

20-23 Oct. 2008

Firstpage

1376

Lastpage

1379

Abstract

A new compact branch-line directional coupler is proposed combined the T-model branch line coupler with defected ground structure (DGS). Using transmission theory, the parameter selection limit about the T-Model equivalent structure is discussed firstly. Then a T-model branch line coupler with DGS is proposed and optimum designed with simulation software. The measurement results show that the proposed coupler has the advantages as compact and well passband flatness.

Keywords

directional couplers; microstrip lines; transmission line theory; T-model branch line coupler; compact branch-line directional coupler; defected ground structure; microstrip transmission line; parameter selection limit; passband flatness; transmission theory; Bandwidth; Coupling circuits; Directional couplers; Frequency; Impedance; Microstrip; Passband; Power transmission lines; Transmission line measurements; Transmission line theory; branch-line coupler; defected ground structure (DGS); equivalent quarter-wavelength transmission line;

fLanguage

English

Publisher

ieee

Conference_Titel

Solid-State and Integrated-Circuit Technology, 2008. ICSICT 2008. 9th International Conference on

Conference_Location

Beijing

Print_ISBN

978-1-4244-2185-5

Electronic_ISBN

978-1-4244-2186-2

Type

conf

DOI

10.1109/ICSICT.2008.4734818

Filename

4734818