Based on the idea that PBG can restrain the promulgating of surface wave in substrate, a novel patch antenna is designed with multi-layer in order to enhance the gain. Through loading the PBG structure, 11.54 dB gain of element can be achieved. Compared to the patch antenna with single layer, 8.68 dB is increased. Then a planar array fed by parallel net with 4×4 elements is manufactured and tested. The experimental results show that VSWR is less than 2.0 from 12.0 GHz to 13.0 GHz, and 22.23 dB gain can be achieved at 12.5 GHz, which is approximately doubled in comparison with the common array. Such planar array will be used extensively in the field of miniaturization for satellite reception.