Abstract: Conformal antenna has low profile characteristics.Conformal antenna improves dynamic and stealth performance of aircraft,enlarges airborne antenna aperture,properly resolves the contradictions of dual mode seeker antenna aperture superimposed.The demand background,main function and research course of conformal antenna and conformal antenna array were reviewd. The characteristics of conformal antenna elements are analyzed，such as microstrip antenna, slot antenna, spiral antenna and coplanar waveguide antenna. The key technology of the conformal antenna in the design and manufacture is extracted. Effects of conformal antenna on radome is summarized.