Lumped-element impedance-transforming uniplanar transitions and their antenna applications

Author

Lin, Yo-Shen ; Chen, Chun Hsiung

Author_Institution

Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan

Volume

52

Issue

4

fYear

2004

fDate

4/1/2004 12:00:00 AM

Firstpage

1157

Lastpage

1165

Abstract

Novel impedance-transforming coplanar waveguide (CPW)-to-coplanar stripline transitions and CPW-to-slotline transitions are proposed, using planar lumped elements to realize the L-section impedance-matching network in the transition structures. Simple equivalent-circuit models based on closed-form expressions are also established, from which various lumped-element impedance-transforming transitions are investigated. Examples for using the proposed transitions in the design of antenna feeding structures are also demonstrated, and successful size reduction has been achieved.

Keywords

antenna feeds; circuit theory; coplanar waveguides; impedance matching; slot lines; strip line transitions; waveguide theory; -coplanar stripline transitions; L section impedance matching network; antenna applications; equivalent circuit models; impedance transforming coplanar waveguide; lumped element impedance transforming uniplanar transition; size reduction; slotline transitions; Antenna accessories; Antenna feeds; Bandwidth; Circuits; Coplanar waveguides; Filters; Impedance matching; MMICs; Stripline; Wideband;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/TMTT.2004.825670

Filename

1284785