An antenna circuit includes a first antenna circuit, a second antenna circuit, and a connection hole. The first antenna circuit is disposed on a non-exterior surface of a terminal device; the second antenna circuit is disposed on an exterior surface of the terminal device, where the exterior surface is a surface of the terminal device visible to a user, and the non-exterior surface is disposed opposite to the exterior surface; and the connection hole penetrates through the non-exterior surface and the exterior surface, where the first antenna circuit and the second antenna circuit are electrically connected by using the connection hole.