A full-wave analysis of waveguide T-junction with an inductive post

Author

Hirokawa, J. ; Sakurai, K. ; Ando, M. ; Goto, N.

Author_Institution

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

fYear

1990

fDate

7-11 May 1990

Firstpage

1250

Abstract

A T-junction with a thick inductive post has been designed for the power combiner/divider of a slotted waveguide array feed. This T-junction is matched by means of a single cylindrical post, placed across the waveguide, parallel to the narrow walls. The design parameters for matching are the position of the inductive post and its diameter. The reflection coefficient of the T-junction with the inductive post is analyzed and minimized, with the diameter of the post taken into account. The analysis is verified by measuring the return loss. The analysis is shown to predict accurately the measured return loss for different diameters of the post. On the basis of this analysis, the position and the diameter of the post are optimized; a return loss below -30 dB is realized over a 5% bandwidth.<>

Keywords

waveguide couplers; waveguide theory; design parameters; full-wave analysis; post diameter; post position; power combiner/divider; reflection coefficient; return loss; slotted waveguide array feed; thick inductive post; waveguide T-junction; waveguide matching; Apertures; Current; Frequency; Green´s function methods; Integral equations; Magnetic fields; Power combiners; Power engineering and energy; Reflection; Region 1;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium, 1990. AP-S. Merging Technologies for the 90's. Digest.

Conference_Location

Dallas, TX, USA

Type

conf

DOI

10.1109/APS.1990.115339

Filename

115339