Patent ID: 8604994

Claim:
An antenna apparatus comprising: a first dielectric substrate having first and second surfaces which are in parallel with each other; a second dielectric substrate having first and second surfaces which are in parallel with each other; a first feeding element provided on the first surface of the first dielectric substrate; the first feeding element transmitting and receiving a wireless signal; a first parasitic element provided on the first surface of the first dielectric substrate; a second feeding element provided on the first surface of the second dielectric substrate, the second feeding element transmitting and receiving a wireless signal; a second parasitic element provided on the first surface of the second dielectric substrate; and a controller for switching over between activation and non-activation of each of the first and second parasitic elements as a reflector, wherein the first parasitic element is provided in proximity to the first and second feeding elements so as to be electromagnetically coupled to the first and second feeding elements, wherein the second parasitic element is provided in proximity to the first and second feeding elements so as to be electromagnetically coupled to the first and second feeding elements, and wherein the first and second dielectric substrates are formed in an integrated dielectric substrate so that the second surface of the first dielectric substrate and the second surface of the second dielectric substrate are opposed to each other.