The present invention relates to a partially reflective surface antenna
and, more particularly, to a partially reflective surface antenna
including a reflective board composed of arrays of microstrip antennas,
and has advantages of low side lobe and high gain. It comprises: a
substrate with an upper surface having a signal transmitting notch for
transmitting and receiving a high frequency signal; a reflective board
for partially reflecting the high frequency signal; and a plurality of
supporting elements for supporting the reflective board on the substrate.
The reflective board has a second antenna array and a first antenna array
surrounded by the second antenna array, wherein the first and the second
antenna array are composed of a plurality of first microstrip reflective
units and a plurality of second microstrip reflective units,
respectively. Besides, the distance between the first microstrip
reflective units is smaller than the distance between the second
microstrip reflective units.