Error correction method of wideband multi-port reflectometer using least mean square

The microwave imaging applications have a great demand in recent years by having considerable interest such as in medical, industrial and military aspects. Particularly, in most research of microwave imaging applications, Vector Network Analyzer (VNA) is frequently been used to act as transmitter an...

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Main Author:	Che Yob, Rashidah
Format:	Thesis
Language:	English
Published:	2014
Subjects:	TK Electrical engineering Electronics Nuclear engineering
Online Access:	http://eprints.utm.my/id/eprint/78350/1/RashidahCheYobMFKE20141.pdf
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spelling	my-utm-ep.783502018-08-26T11:52:01Z Error correction method of wideband multi-port reflectometer using least mean square 2014-01 Che Yob, Rashidah TK Electrical engineering. Electronics Nuclear engineering The microwave imaging applications have a great demand in recent years by having considerable interest such as in medical, industrial and military aspects. Particularly, in most research of microwave imaging applications, Vector Network Analyzer (VNA) is frequently been used to act as transmitter and receiver to allow the measurement of complex ratio between two microwave signals and also provide accurate measurement of reflected and scattering parameters, but it is bulky and expensive. Therefore, in this research, a portable low-cost measurement device namely multi-port reflectometer is proposed as an alternative to VNA in the imaging system. The configuration of this device is formed by four couplers and two power dividers over the operating wideband frequency range between 1 and 6 GHz. The investigation of the characteristics and operation of such reflectometer are accessed via simulation using existing components in Agilent’s Advance Design System (ADS) software and measurement of real components in the laboratory. The real components used are Krytar 90º hybrid coupler and Aeroflex two-way in-phase power divider. Each component constituting the multi-port reflectometer is not operated in error-free state in wideband frequency range. Thus, in order to offer accurate measurement of any Device Under Test (DUT) using wideband multi-port reflectometer, a suitable error correction procedure or known as calibration is implemented. A variety of loads have been used as DUT in order to verify the proposed error correction method. A one-port error model with three standards and Least Mean Square (LMS) technique have been applied to the proposed multi-port reflectometer. Through that, any imperfect operation of the wideband multi-port reflectometer is removed. By implementing the proposed error correction method, the imperfect operation of the multi-port reflectometer has successfully been corrected and an accurate wideband performance with fully error correction can be offered. Therefore, the multi-port reflectometer achieves the desired value of its operation. 2014-01 Thesis http://eprints.utm.my/id/eprint/78350/ http://eprints.utm.my/id/eprint/78350/1/RashidahCheYobMFKE20141.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:80016 masters Universiti Teknologi Malaysia, Faculty of Electrical Engineering Faculty of Electrical Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TK Electrical engineering Electronics Nuclear engineering
spellingShingle	TK Electrical engineering Electronics Nuclear engineering Che Yob, Rashidah Error correction method of wideband multi-port reflectometer using least mean square
description	The microwave imaging applications have a great demand in recent years by having considerable interest such as in medical, industrial and military aspects. Particularly, in most research of microwave imaging applications, Vector Network Analyzer (VNA) is frequently been used to act as transmitter and receiver to allow the measurement of complex ratio between two microwave signals and also provide accurate measurement of reflected and scattering parameters, but it is bulky and expensive. Therefore, in this research, a portable low-cost measurement device namely multi-port reflectometer is proposed as an alternative to VNA in the imaging system. The configuration of this device is formed by four couplers and two power dividers over the operating wideband frequency range between 1 and 6 GHz. The investigation of the characteristics and operation of such reflectometer are accessed via simulation using existing components in Agilent’s Advance Design System (ADS) software and measurement of real components in the laboratory. The real components used are Krytar 90º hybrid coupler and Aeroflex two-way in-phase power divider. Each component constituting the multi-port reflectometer is not operated in error-free state in wideband frequency range. Thus, in order to offer accurate measurement of any Device Under Test (DUT) using wideband multi-port reflectometer, a suitable error correction procedure or known as calibration is implemented. A variety of loads have been used as DUT in order to verify the proposed error correction method. A one-port error model with three standards and Least Mean Square (LMS) technique have been applied to the proposed multi-port reflectometer. Through that, any imperfect operation of the wideband multi-port reflectometer is removed. By implementing the proposed error correction method, the imperfect operation of the multi-port reflectometer has successfully been corrected and an accurate wideband performance with fully error correction can be offered. Therefore, the multi-port reflectometer achieves the desired value of its operation.
format	Thesis
qualification_level	Master's degree
author	Che Yob, Rashidah
author_facet	Che Yob, Rashidah
author_sort	Che Yob, Rashidah
title	Error correction method of wideband multi-port reflectometer using least mean square
title_short	Error correction method of wideband multi-port reflectometer using least mean square
title_full	Error correction method of wideband multi-port reflectometer using least mean square
title_fullStr	Error correction method of wideband multi-port reflectometer using least mean square
title_full_unstemmed	Error correction method of wideband multi-port reflectometer using least mean square
title_sort	error correction method of wideband multi-port reflectometer using least mean square
granting_institution	Universiti Teknologi Malaysia, Faculty of Electrical Engineering
granting_department	Faculty of Electrical Engineering
publishDate	2014
url	http://eprints.utm.my/id/eprint/78350/1/RashidahCheYobMFKE20141.pdf
_version_	1747817967773548544

Error correction method of wideband multi-port reflectometer using least mean square

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