A Sparse Conformal Multi-Faceted Array Based on Pyramid/Trapezoid Subarrays

The sparse conformal multi-faceted array is an effective solution to address the high cost associated with traditional conformal multi-faceted arrays, as it significantly reduces the number of channels while maintaining the original scanning performance. In this paper, we propose a sparse conformal multi-faceted array based on pyramid/trapezoid subarrays, which features a regular topology and achieves excellent scanning capability without the need for complex beamforming. To validate the effectiveness of this topology, we consider the cooperative operation of two orthogonally placed rectangular array surfaces with dimensions of
$9.5\lambda\times 4.5\lambda$
. We use a mathematical computational model of a 3-D conformal array to verify the performance of this topology. Compared to rectangular and triangular array configurations, the proposed topology reduces the number of channels by approximately 44%, with only a slight decrease of 0.6 dBi in the directivity and nearly unchanged sidelobe levels.