volume | PIER Journals

Abstract

To address the engineering challenges of conformal frequency diverse array (FDA) on complex curved surfaces and beamforming optimization, and leveraging the fact that the surface of a streamlined platform can be approximated by an elliptical arc, an elliptical-arc conformal FDA is taken as a representative example, and a conformal frequency diverse array method based on joint parameter optimization (JO-CFDA) is proposed. First, a polygonal approximation model is employed to achieve conformity between the array and the curved surface; then, the parameter α is introduced to control the non-uniform distribution of inter-element spacing along each edge; finally, the parameter β is used to allocate the frequency-offset exponent in a slope-normalized manner. These two parameters work in concert to jointly optimize beam characteristics in both the spatial layout and frequency-domain distribution. Simulation results demonstrate that the proposed method can significantly reduce sidelobe levels and enhance beam directivity while maintaining mainlobe width and peak gain, thereby validating its effectiveness and superiority.

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Professor Wei Xu

Dr. Juncheng Ma

Professor Pingping Huang

Prof. Weixian Tan

Dr. Zhiqi Gao