Patent ID: 7319429

Claim:
A partially reflective surface antenna, adapting for receiving and transmitting a high frequency signal, which comprises: a substrate having an upper surface, wherein the upper surface has a signal transmitting notch to receive and transmit the high frequency signal; a reflective board for partially reflecting the high frequency signal, wherein a first antenna array and a second antenna array are disposed on the surface of the reflective board, and the first antenna array is surrounded by the second antenna array; and a plurality of supporting elements for supporting the reflective board on the upper surface of the substrate and maintaining a specific distance between the reflective board and the substrate; wherein the first antenna array is composed of a plurality of first microstrip reflective units, the second antenna array is composed of a plurality of second microstrip reflective units; each of said first microstrip reflective units has a size equal to that of each of said second microstrip reflective units; and the distance between the first microstrip reflective units is smaller than the distance between the second microstrip reflective units.