Modelling and performance of an integrated six-port reflectometer operated with pulsed signals.
Item
-
Title
-
Modelling and performance of an integrated six-port reflectometer operated with pulsed signals.
-
Identifier
-
AAI8821075
-
identifier
-
8821075
-
Creator
-
Colef, Gabriel-Dumitru.
-
Contributor
-
Adviser: M. Ettenberg
-
Date
-
1988
-
Language
-
English
-
Publisher
-
City University of New York.
-
Subject
-
Engineering, Electronics and Electrical
-
Abstract
-
The research presented here introduces the modeling of an integrated six-port reflectometer and the operation of a microstrip integrated six-port reflectometer using pulsed signals.;The research presents the modeling of an integrated six-port reflectometer using a powerful CAD program, called MIDAS, developed at the SRI David Sarnoff Research Center. The program is capable of simulating networks with any number of ports, and further integrate them into larger networks. A six-port configuration, that consists of quadrature hybrids and an in-phase power divider, is simulated on MIDAS. The six-port reflectometer operation is modeled using two approaches. One approach uses power ratios obtained from MIDAS directly, and the other one uses the S-parameters obtained from MIDAS to calculate the power ratios, which are needed to calibrate the six-port and to perform measurements of different loads. The six-port reflectometer is modeled for frequencies from 7 GHz to 9 GHz and measurements of reflection coefficients for various loads are reported.;The pulsed operation of a microstrip six-port reflectometer using diode detectors is investigated. The circuit configuration, the calibration and measurement procedures are presented. The operation of the six-port reflectometer is investigated under CW and pulsed signals operation conditions. The CW performance is investigated over the band of frequencies from 2 GHz to 14 GHz, and measurements of reflection coefficients for different loads are reported. The diode calibration procedure is also addressed, and two new techniques are introduced. The operation of the six-port reflectometer with pulsed signals is investigated and results with pulse widths as low as 3 microseconds are presented. Different peak detectors are presented and the problems associated with their use in six-port reflectometers operated with pulsed signals are discussed. All the measurement results are compared to the ones given by an HP-8409 Automatic Network Analyzer.
-
Type
-
dissertation
-
Source
-
PQT Legacy CUNY.xlsx
-
degree
-
Ph.D.
