Simplified design technique for high-performance microstrip multisection couplers

Author

Lau, Duncan K Y ; Marsh, Steve P. ; Davis, Lionel E. ; Sloan, Robin

Author_Institution

Dept. of Electr. Eng. & Electron., Univ. of Manchester Inst. of Sci. & Technol., UK

Volume

46

Issue

12

fYear

1998

fDate

12/1/1998 12:00:00 AM

Firstpage

2507

Lastpage

2513

Abstract

A new design technique has been developed which improves the design of a microstrip multisection coupler by a simplified version of the nonuniform coupler method. The technique achieves the performance of a smooth, discontinuity free, nonuniform coupler with a sectional breakdown of the coupling along the structure that can be simply and quickly optimized in a commercial simulator such as Libra. The design is further improved by the use of the “saw-tooth” odd- and even-mode equalization technique, and the effectiveness of this is verified experimentally. The measured results demonstrate an improved performance over the multisection coupler in terms of coupling performance and bandwidth, while the size and the fabrication tolerance are better than the nonuniform line coupler

Keywords

microstrip couplers; microwave phase shifters; power combiners; Libra; bandwidth; coupling performance; even-mode equalization; fabrication tolerance; microstrip multisection couplers; nonuniform coupler method; odd-mode equalization; saw-tooth equalization technique; Bandwidth; Couplers; Coupling circuits; Design optimization; Electric breakdown; Fourier transforms; Frequency; Materials science and technology; Microstrip; Size measurement;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.739241

Filename

739241