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Broadband frequency reconfigurable printed transceivers for microwave imaging systems

Published online by Cambridge University Press:  07 November 2022

Ankita Malhotra Open the ORCID record for Ankita Malhotra [Opens in a new window]  and
Ananjan Basu
Ankita Malhotra*
Affiliation:
Electronics and Telecommunications Department, R.G.I.T, Mumbai, India
Ananjan Basu
Affiliation:
Centre for Applied Research in Electronics, IIT, Delhi, India
*
Author for correspondence: Ankita Malhotra, E-mail: ankitakec52224@gmail.com
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Abstract

In this paper, we propose a novel method for obtaining wideband spectral information of the target in microwave imaging systems by using broadband frequency reconfigurable printed transceivers. The proposed transceiver is composed of two embedded stacked microstrip antenna configurations operating in C-band (5.5–8.5 GHz) and X-band (8.5–11.5 GHz) with each having 3 GHz bandwidth. The transceiver switches between the two configurations (and thus frequency bands) using PIN diodes and collects response of the antenna in the presence of the target, in both the operating bands. This information is then combined to obtain wideband spectral information of the target from 5.5 to 11.5 GHz to achieve improved image reconstruction. The proposed reconfigurable transceiver has advantage over traditional broadband transceivers (those have slots/meandering at ground plane to achieve wideband response) that it has unidirectional radiation patterns throughout its band of operation. Hence the imaging system is implemented without the absorbers. This keeps the system compact and inconspicuous when installed for security applications. Here, a bistatic system is employed with two-dimensional target scanning performed in a real outdoor environment.

Keywords

Antennaimagingmicrowavereconfigurable2D scanning
Type
Microwave Measurements
Information
International Journal of Microwave and Wireless Technologies , Volume 15 , Issue 7 , September 2023 , pp. 1130 - 1138
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Copyright
© The Author(s), 2022. Published by Cambridge University Press in association with the European Microwave Association

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