Broadband Measurements of S-Parameters Utilizing 4x4 Butler Matrices

Author

Staszek, Kamil ; Gruszczynski, Slawomir ; Wincza, Krzysztof

Author_Institution

Fac. of Comput. Sci., Electron. & Telecommun., AGH Univ. of Sci. & Technol., Krakow, Poland

Volume

61

Issue

4

fYear

2013

fDate

Apr-13

Firstpage

1692

Lastpage

1699

Abstract

A novel application of 4 × 4 Butler matrices in a multiport measurement technique has been investigated. The proposed measuring system consists of two standard Butler matrices. By application of numerical procedure in measurement system calibration, an enhanced accuracy has been achieved. An influence of power detectors´ uncertainty and imperfect Butler matrix parameters on calibration procedure and measurement results has been investigated. The proposed measuring system has been verified by measurements of scattering parameters of two attenuators and a narrowband bandpass filter in frequency range of 2-3 GHz. It has been shown that the proposed system allows for achieving results corresponding closely to the measurements obtained with the commercial vector network analyzer.

Keywords

S-parameters; attenuators; band-pass filters; calibration; measurement systems; Butler matrix; S-parameter; attenuator; broadband measurement; frequency 2 GHz to 3 GHz; measurement system calibration; multiport measurement; narrowband bandpass filter; power detector; scattering parameter measurement; vector network analyzer; Accuracy; Butler matrix; Calibration; Measurement uncertainty; Ports (Computers); Power measurement; Uncertainty; Butler matrix; multiport measurement technique; multiports; power detector uncertainty; scattering parameters;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/TMTT.2013.2247050

Filename

6473853