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Trapezoidal pulse-switching strategy for failure correction of multi-pattern time-modulated linear array

Published online by Cambridge University Press:  15 November 2022

Ananya Mukherjee ,
Sujoy Mandal ,
Sujit K. Mandal Open the ORCID record for Sujit K. Mandal [Opens in a new window]  and
Rowdra Ghatak
Ananya Mukherjee*
Affiliation:
Microwave and Antenna Research Laboratory, Department of Electronics and Communication Engineering, National Institute of Technology Durgapur, Durgapur – 09, West Bengal, India
Sujoy Mandal
Affiliation:
Microwave and Antenna Research Laboratory, Department of Electronics and Communication Engineering, National Institute of Technology Durgapur, Durgapur – 09, West Bengal, India
Sujit K. Mandal
Affiliation:
Microwave and Antenna Research Laboratory, Department of Electronics and Communication Engineering, National Institute of Technology Durgapur, Durgapur – 09, West Bengal, India
Rowdra Ghatak
Affiliation:
Microwave and Antenna Research Laboratory, Department of Electronics and Communication Engineering, National Institute of Technology Durgapur, Durgapur – 09, West Bengal, India
*
Author for correspondence: Sujit K. Mandal, E-mail: [email protected]
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Abstract

In this paper, a novel approach for simultaneously correcting multiple degraded patterns under the failure condition of time-modulated linear arrays is proposed. The approach is based on the use of trapezoidal pulse with non-zero rise/fall time to control the switching status of the radio frequency switches that enables ON-OFF keying modulation of the array elements. After deriving a closed form expression of harmonic power loss and through the in-depth analysis, it is explored that the proposed trapezoidal pulse, because of having non-zero rise/fall time, provides less undesired harmonic power loss as compared to the conventionally used rectangular pulse with ideally zero rise/fall time. With the aim of reconstructing the degraded patterns with improved directivity and suppressed higher sideband power, three pulse-switching strategies based on rectangular and trapezoidal pulse have been employed, and their comparative performances prove the superiority of the proposed approach.

Keywords

Differential evolutionpulse shapingside lobe leveltime modulated linear array
Type
Antenna Design, Modeling and Measurements
Information
International Journal of Microwave and Wireless Technologies , Volume 15 , Issue 7 , September 2023 , pp. 1188 - 1204
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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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