Compensation of Radome Effects in Small Airborne Monopulse Arrays by Convex Optimization

The quality of small array antennas in airborne monopulse systems can be significantly reduced by the radome. We therefore present a convex optimization approach to minimize radome effects in monopulse arrays. This is achieved by using active element patterns in the optimization to determine the exc...

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Bibliographic Details
Published inIET Conference Proceedings
Main Authors Frid, H, Jonsson, BLG
Format Conference Proceeding
LanguageEnglish
Published Stevenage The Institution of Engineering & Technology 09.04.2018
Subjects
Antenna arrays
Convex analysis
Convexity
Design parameters
Optimization
Radomes
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Summary:The quality of small array antennas in airborne monopulse systems can be significantly reduced by the radome. We therefore present a convex optimization approach to minimize radome effects in monopulse arrays. This is achieved by using active element patterns in the optimization to determine the excitation weights. Simulation results for a BoR array with 48 elements and an extended hemispherical radome are presented. We demonstrate that it is possible to reduce the side-lobe level by 3.5 dB by taking radome effects into account in the optimization. This approach also results in an increased gain, particularly at large scan angles. Furthermore, the presented approach allows the monopulse slope to be indirectly specified as a design parameter. It is shown that the trade-off between the monopulse slope coefficient and the side-lobe level is approximately linear.
ISBN:1785618164
9781785618161
DOI:10.1049/cp.2018.0647