Design and study of enhanced wideband transition between coplanar waveguide and broadside coupled stripline

Author

Wen-Jun Lu ; Heng Tong ; Ya-Ming Bo ; Hong-Bo Zhu

Author_Institution

Jiangsu Key Lab. of Wireless Commun., Nanjing Univ. of Posts & Telecommun., Nanjing, China

Volume

7

Issue

9

fYear

2013

fDate

June 18 2013

Firstpage

715

Lastpage

721

Abstract

Enhanced wideband transition between coplanar waveguide (CPW) and broadside coupled stripline (BCS) with arbitrary characteristic impedance ratio is developed on a basis of an improved tightly coupling, via-hole-free structure. The E-field of CPW gradually changes to that of BCS within a wide bandwidth with ratio up to 10.4:1. Parametric studies of the transition are carried out and four different back-to-back prototypes are simulated, fabricated and measured. It is shown that maximum operation bandwidth from 1.16 to 12.01 GHz for return loss higher than 10 dB and average insertion loss of 1.41 dB can be obtained.

Keywords

UHF circuits; coplanar waveguides; microwave circuits; strip lines; BCS; CPW; E-field; arbitrary characteristic impedance ratio; average insertion loss; bandwidth 1.61 GHz to 12.01 GHz; broadside coupled stripline; coplanar waveguide; loss 1.41 dB; maximum operation bandwidth; return loss; via-hole-free structure; wideband transition enhancement;

fLanguage

English

Journal_Title

Microwaves, Antennas & Propagation, IET

Publisher

iet

ISSN

1751-8725

Type

jour

DOI

10.1049/iet-map.2012.0506

Filename

6568405