12 May 2016 Antenna phase center locations in tapered aperture subarrays
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Antenna apertures are often parsed into subapertures for Direction of Arrival (DOA) measurements. However, when the overall aperture is tapered for sidelobe control, the locations of phase centers for the individual subapertures are shifted due to the local taper of individual subapertures. Furthermore, individual subaperture gains are also affected. These non-uniform perturbations complicate DOA calculations. Techniques are presented to calculate subaperture phase center locations, and algorithms are given for equalizing subapertures’ gains.
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A. W. Doerry, A. W. Doerry, D. L. Bickel, D. L. Bickel, "Antenna phase center locations in tapered aperture subarrays", Proc. SPIE 9829, Radar Sensor Technology XX, 98291K (12 May 2016); doi: 10.1117/12.2214515; https://doi.org/10.1117/12.2214515

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