Design and modeling of twin-spiral coplanar-waveguide-to-slotline transitions

Author

Lin, Yo-Shen ; Chen, Chun Hsiung

Author_Institution

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

Volume

48

Issue

3

fYear

2000

fDate

3/1/2000 12:00:00 AM

Firstpage

463

Lastpage

466

Abstract

A novel reduced-size twin-spiral coplanar-waveguide-to-slotline transition is proposed in this paper. This twin-spiral transition is based on a modification of quarter-wavelength transformer structure. For design purposes, a hybrid equivalent-circuit model combining transmission-line theory and full-wave simulation is established. Based on this model, various twin-spiral transition structures are carefully examined theoretically and experimentally. Specifically, a twin-spiral transition with 2.26:1 bandwidth and one-quarter the size of conventional ones is achieved. Being simple in fabrication and small in size, the proposed twin-spiral coplanar-waveguide-to-slotline transition is a useful component in uniplanar microwave integrated circuit/monolithic-microwave integrated-circuit applications

Keywords

MMIC; coplanar waveguides; equivalent circuits; microwave integrated circuits; slot lines; transmission line theory; waveguide transitions; CPW-to-slotline transitions; MMIC application; coplanar-waveguide-to-slotline transitions; full-wave simulation; hybrid equivalent-circuit model; microwave integrated circuit; modeling; monolithic microwave IC; quarter-wavelength transformer structure; reduced-size transition; transmission-line theory; twin-spiral transition; uniplanar MIC application; Application specific integrated circuits; Bandwidth; Coplanar waveguides; Fabrication; MMICs; Microstrip; Microwave integrated circuits; Slotline; Spirals; Transmission lines;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.826848

Filename

826848