Low temperature Co fired ceramic (LTCC) technology is used in the fabrication of circularly polarized two layer micro strip array antenna taking ceramic as the substrate. In conventional design, multi layer parasitic micro strip array antenna is fabricated with flexible substrate material. However, due to the machining accuracy and air layer between substrates, the circular polarization characteristics and impedance match of the antenna array is greatly different from the simulation results. In this article, 16 elements two layer micro strip array antenna was designed with low loss high frequency ceramic material at X band. In practice testing，the 16 elements array antenna had good bandwidth and circular polarization characteristics, proving that LTCC technology could be well applied to the fabrication of micro strip antenna array.