Broad-band coaxial directional couplers for high-power applications

Author

Teppati, Valeria ; Goano, Michele ; Ferrero, Andrea ; Niculae, Valentin ; Olivieri, Augusto ; Ghione, Giovanni

Author_Institution

Dipt. di Elettronica, Politecnico di Torino, Italy

Volume

51

Issue

3

fYear

2003

fDate

3/1/2003 12:00:00 AM

Firstpage

994

Lastpage

997

Abstract

A new class of coaxial broad-band directional couplers for high-power RF testing is presented. These devices overcome the drawbacks of classical stripline and coaxial couplers, and allow simple low-cost mechanical construction. A design technique for the new longitudinally nonuniform transversally nonsymmetrical couplers is described, providing the synthesis of any coupling shape versus frequency. As a first demonstration of the proposed method, a set of broad-band (2-7.5 GHz) low-coupling (-30, -33, -35 dB) nonsymmetrical coaxial directional couplers in air has been designed, built, and characterized, showing very good agreement between predicted and obtained performances.

Keywords

coaxial waveguides; conformal mapping; directional couplers; 2 to 7.5 GHz; RF testing; broadband coaxial directional couplers; coupling shape; high-power applications; low-cost mechanical construction; nonsymmetrical coaxial directional couplers; Bandwidth; Coaxial cables; Coaxial components; Conductors; Conformal mapping; Cutoff frequency; Directional couplers; Microstrip; Radio frequency; Stripline;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/TMTT.2003.808733

Filename

1191759