On design of tunable leaky waveguide antennas for a large format lens based focal plane array with wide scanning capabilities

Master thesis (2023)

Authors

M. Zhang Electrical Engineering, Mathematics and Computer Science

Contributors

Nuria Llombart Tera-Hertz Sensing - EEMCS (supervisor 1)
Shahab Oddin Dabironezare Tera-Hertz Sensing - EEMCS (supervisor 1)
B.J. Kooij Microwave Sensing, Signals & Systems - EEMCS (supervisor 2)
Faculty
Electrical Engineering, Mathematics and Computer Science
Copyright: © 2023 Muhan Zhang
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Published Date

07-11-2023

Language

English

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Faculty

Electrical Engineering, Mathematics and Computer Science

Abstract

Recently, there has been an increasing demand for security in public places. As a result, non-destructive and fast millimetre-wave and submillimetre-wave imaging systems have gained more and more attention.
This project is based on Concealed Objects Stand-off Real-Time Imaging for Security (CONSORTIS), which is a European next-generation airport security imaging radar system published in 2017. In this project, we will discuss the design of the lens antenna illuminated by a leaky wave waveguide antenna for a large format focal plane array with wide scanning capabilities in three typical cases. The Coherent Fourier Optics (CFO) and leaky wave antenna design methodologies are used in this project. The system will be analysed in reception mode and then validated in transmission mode. We have a very promising performance with an aperture efficiency of about 80% in the centre and 47% at the edge of the array with a shaped top and AR coating. The directivity of the antenna at the edge is about 50.2 dB. And the scan loss is about -2.3 dB, which means it can scan about 10,000 beams in total.