On Spherical Near-Field Antenna Measurement Using Fibonacci Sampling Scheme

To address the inefficiency of the traditional equiangular sampling method, a new sampling scheme based on Fibonacci spiral point distribution is presented in this paper. The scheme realizes a nearly uniform distribution of sampling points on the spherical surface while retaining the smoothness and continuity of the sampling path. The sampled data are utilized to calculate spherical wave coefficients by the regularized least squares method. Experimental simulations indicate that the proposed scheme achieves the far-field pattern accuracy comparable to that of the equiangular sampling while significantly enhancing the sampling efficiency.