Optimised Direction of Arrival Estimation for Shaped Dielectric Lens Antennas using Curve Fitting Approach

In traditional DOA estimation algorithms, the refractive and curvature effects of the lens antenna are not considered and the estimated arrival angle is Virtual Direction of Arrival (VDOA). DOA algorithms considering the lens effects compute Actual Direction of arrival (ADOA) but they are computatio...

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Bibliographic Details
Published in2023 IEEE Wireless Antenna and Microwave Symposium (WAMS) pp. 1 - 4
Main Authors G, Amogh, Bharadwaj, Bhuvan, G, Dheeraj, Ks, Shushrutha
Format Conference Proceeding
LanguageEnglish
Published IEEE 07.06.2023
Subjects
Array Antenna
Curve Fitting
Direction of Arrival
Direction-of-arrival estimation
Directive antennas
Estimation
Lens Antenna
Microwave antennas
Microwave theory and techniques
Ray tracing
Wireless communication
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Summary:In traditional DOA estimation algorithms, the refractive and curvature effects of the lens antenna are not considered and the estimated arrival angle is Virtual Direction of Arrival (VDOA). DOA algorithms considering the lens effects compute Actual Direction of arrival (ADOA) but they are computationally exhaustive and needs abundant memory. In this paper ADOA is efficiently computed and ADOA-VDOA relationship is established by Curve Fitting Method (CFM). In CFM the relation between ADOA and VDOA is developed using the Ray Tracing approach. This relation is approximated and fits into a cubic polynomial, this polynomial is a function of the dielectric constant, the curvature of shaped lens and VDOA. This analysis is carried out for a hemispherical lens - linear array antenna. The CFM method is compared with the traditional Ray Tracing procedure and found to be in close agreement.
DOI:10.1109/WAMS57261.2023.10242910