Analysis and design of low-loss planar microwave baluns having three symmetric coupled lines

Author

Jong-Wook Lee ; Webb, K.J.

Author_Institution

Sch. of Electr. & Comput. Eng., Purdue Univ., West Lafayette, IN, USA

Volume

1

fYear

2002

fDate

2-7 June 2002

Firstpage

117

Abstract

The bandwidth of the Marchand balun is analyzed as a function of design parameters using a simple model, which provides the analytical design basis for the planar three-coupled-line balun. Analytical and numerical results are presented to facilitate balun design. Using this approach, a low loss planar microstrip balun was designed, fabricated and tested. The measured balun insertion loss for one example was less than 0.5 dB over a 8-13 GHz band, with 3-dB bandwidth 6.5-16 GHz.

Keywords

baluns; coupled transmission lines; design engineering; losses; microstrip lines; 0.5 dB; 6.5 to 16 GHz; 8 to 13 GHz; Marchand balun bandwidth; analytical design; balun design; balun fabrication; balun insertion loss; balun testing; design model; design parameters; low loss planar microstrip balun; low-loss planar microwave baluns; planar three-coupled-line balun; symmetric coupled lines; Bandwidth; Broadband amplifiers; Coaxial components; Conductors; Design engineering; Equivalent circuits; Frequency; Impedance matching; Microstrip; Reflection;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 2002 IEEE MTT-S International

Conference_Location

Seattle, WA, USA

ISSN

0149-645X

Print_ISBN

0-7803-7239-5

Type

conf

DOI

10.1109/MWSYM.2002.1011573

Filename

1011573