In this paper, a conical missile-borne conformal antenna is proposed to meet a specific application. To achieve good omnidirectional circularly polarized (CP) radiation, the proposed antenna array is consisted of four identical CP microstrip antennas, which are dis- tributed around the projectile. Shifter network and optimized patch is used to get CP perfor- mance for each antenna. The measured results are in good agreement with the simulation one. The experimental results show that the axial ratio (AR) of element antenna is less than 3 dB and omni-axis ratio is less than 6 dB. The pattern of antenna in the horizontal direction is circular, with un-roundness less than 2 dB and the vertical pattern is “8”.