Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/34335
Title: Modeling and Design of Symmetrical Six-Port Waveguide Junction for Six-Port Reflectometer Application
Authors: MEYSAM SABAHIALSHOARA
Keywords: Six-Port Technique, Waveguide, LSBRM, Calibration, Electromagnetic Modeling, Reflectometer
Issue Date: 2-Dec-2011
Source: MEYSAM SABAHIALSHOARA (2011-12-02). Modeling and Design of Symmetrical Six-Port Waveguide Junction for Six-Port Reflectometer Application. ScholarBank@NUS Repository.
Abstract: The Six-Port technique is a well known technique introduced in 1972 by Hoer and Engen. Unlike VNA which uses frequency down conversion to acquire the phase information, the Six-Port technique directly extracts both magnitude and phase of the reflection coefficient with only four scalar power measurements. To achieve the optimum performance of the Six-Port technique, a six-port network that minimizes the effects of imperfections is needed. First, we develop a computer model that is able to predict the scattering coefficients of the symmetrical N-port step waveguide junction. Then, we will perform some numerical experiments. We use this model to search for a new six-port junction design able to satisfy the requirements for the optimum performance. To use the designed six-port network as a reflectometer, we develop a calibration procedure based on an optimization approach. Finally, we measure the reflection coefficients of different DUTs which are in agreement (+/- 0.02 magnitude, +/-2 degree phase) with the results obtained by a VNA (viz. HP8510C).
URI: http://scholarbank.nus.edu.sg/handle/10635/34335
Appears in Collections:Ph.D Theses (Open)

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