An accurate operation of wideband multi-port reflectometer with new calibration method implementing least mean square for microwave imaging application

The wideband operation of multi-port reflectometer may lead to inaccurate reflection coefficient measurement caused by the overlapped phase characteristics of the used calibration standards. Therefore, a calibration procedure implementing Least Mean Square (LMS) is proposed to offer accurate operati...

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Bibliographic Details
Main Authors: Che Yob, Rashidah, Seman, Norhudah
Format: Article
Published: Penerbit UTM Press 2015
Subjects:
Online Access:http://eprints.utm.my/id/eprint/57731/
http://dx.doi.org/10.11113/jt.v73.4256
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Institution: Universiti Teknologi Malaysia
Description
Summary:The wideband operation of multi-port reflectometer may lead to inaccurate reflection coefficient measurement caused by the overlapped phase characteristics of the used calibration standards. Therefore, a calibration procedure implementing Least Mean Square (LMS) is proposed to offer accurate operation of wideband multi-port reflectometer from 1 to 6 GHz. Its well wideband performance is verified by attenuators of 3, 6 and 10 dB that assessed as the device under tests (DUTs). The proposed LMS contains a learning rate, m and updated weight coefficient, W(k+1) to eliminate error and achieve the corrected reflection coefficient of DUT