Spiral antenna array configurations on spherical surface

Array antennas on the spherical surface offer a wide range of opportunities in the variation of their radiation patterns through antennas distribution and phase control. Elementary antennas could be distributed on the spherical surfaces in many different ways and in this paper one of them is chosen - spiral configuration with three subtypes: Archimedean, Fermat and Logarithmic spiral distributions of elementary antennas mounted on spherical surfaces. The paper studies different spiral configuration pattern influence on the radiation pattern of a spherical antennas array. Analysis was made using a developed moment method program with spectral-domain approach.