An accurate six-port microstrip reflectometer

Author

Affandi, Adnan M. ; Rushdi, Ali M.

Author_Institution

Dept. of Electr. & Comput. Eng., King Abdulaziz Univ., Jeddah, Saudi Arabia

Volume

2

fYear

1995

fDate

24-27 Jul 1995

Firstpage

563

Abstract

This paper describes the properties of a novel 8-port coupler which has been assembled out of three 4-port interdigitated couplers. The procedures used in the design of this coupler, as well as in the derivation of its essential parameters are demonstrated. The scattering matrix of the proposed coupler is derived by using the signal flow graph (SFG) technique. The 8-port coupler has been modified with proper terminations in order to produce a working six-port reflectometer. Detailed SFG analysis of this reflectometer reveals that it is inherently of a broad-band character. This reflectometer has been fabricated, calibrated and tested at the X band

Keywords

S-matrix theory; calibration; microstrip couplers; multiport networks; reflectometers; signal flow graphs; testing; 4-port interdigitated couplers; 8-port coupler; X band; accurate six-port microstrip reflectometer; broad-band; calibration; design; fabrication; scattering matrix; signal flow graph; terminations; test; Bandwidth; Coupling circuits; Flow graphs; Frequency measurement; Impedance measurement; Microstrip; Microwave measurements; Millimeter wave measurements; Narrowband; Scattering parameters;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave and Optoelectronics Conference, 1995. Proceedings., 1995 SBMO/IEEE MTT-S International

Conference_Location

Rio de Janeiro

Print_ISBN

0-7803-2674-1

Type

conf

DOI

10.1109/SBMOMO.1995.509680

Filename

509680