Synthesis of Low-Sidelobe Stepped-Amplitude Aperiodic Phased Arrays

Conference paper (2021)

Authors

Y. Aslan

A.G. Roederer

Alexander Yarovoy

DOI: https://doi.org/10.23919/EuCAP51087.2021.9411337

Phased arrays Array synthesis Aperiodic arrays Stepped amplitude arrays

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Published Date

2021

Language

English

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Abstract

A novel stepped-amplitude aperiodic phased array synthesis method is proposed. The presented technique is based on iterative convex element position perturbations and uses pre-defined excitation amplitudes. A 64-element irregular array with two discrete amplitude levels (0.5 at the edge-elements and 1 at the center-elements) is synthesized for demonstration purposes. The array achieves a side lobe level lower than - 30 dB and a directivity higher than 20 dBi within the given field-of-view (±60 degrees in azimuth and ±15 degrees in elevation). Through comparative studies of the array directivity, effective isotropic radiated power and maximal side lobe level with the ones of the uniformly-fed/amplitude-tapered periodic arrays and a uniformly-fed aperiodic array, it is shown that the proposed stepped-amplitude array provides the best complexity/performance trade-off.

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