Abstract: The conventional spherical conformal antenna array has a complicated feed network, each antenna element needs to be individually fed and controlled in phase, resulting in lower antenna efficiency. In this paper, we propose a single- fed spherical conformal omnidirectional antenna array, which adopts the aperture coupling feeding method. A 1-to-30 feeding network is designed for the spherical array. In this way, we can feed all antenna elements through one port, which reduces the complexity of the feeding and improves antenna efficiency. The direction pattern is omnidirectional on the x-y plane. The gain variation of the x-y plane is less than 1 dB, and the x-z plane has a half-power beam-width (HPBW) of about 120°, which achieves a larger spatial coverage area than conventional omnidirectional antennas. The directivity of the antenna is only 1 dBi.