An analysis of a waveguide T junction with an inductive post

Author

Hirokawa, Jiro ; Sakurai, Kimio ; Ando, Makoto ; Goto, Nasato

Author_Institution

Dept. of Electr. & Electron. Eng., Tokyo Inst. of Technol.

Volume

39

Issue

3

fYear

1991

fDate

3/1/1991 12:00:00 AM

Firstpage

563

Lastpage

566

Abstract

The authors analyze the T junction with an inductive post, taking its diameter into account for the case where the current distribution is assumed on the surface of the post. A single cylindrical post placed in a T junction improves the impedance matching and compensates the junction discontinuity in a wide frequency band. The effects of the design parameters, such as the diameter of the post and its location, are clarified. The measured return loss is accurately predicted. On the basis of this analysis, an effective design procedure for the T junction is proposed, and the reflection below -30 dB is realized over 4% bandwidth

Keywords

current distribution; impedance matching; waveguide couplers; waveguide theory; current distribution; cylindrical post; design parameters; design procedure; impedance matching; inductive post; junction discontinuity compensation; post diameter; return loss; waveguide T junction; Antenna arrays; Apertures; Bandwidth; Frequency; Impedance matching; Manufacturing; Power dividers; Reflection; Satellite broadcasting; Waveguide junctions;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.75301

Filename

75301