Study on the Near Field Characteristic of Antenna in Package

In this paper, the finite difference time domain model for the antenna in package is presented. The distribution of the electric field in the package cavity is analyzed, and a method that reduces the near field is proposed. By arranging via position reasonably, at most the area of the cavity electric field is uniform and decreased less than 10 dBV/m. The measured and simulated results show that the new shielding structure can decrease the electric field in the package cavity by about 10 dBV/m.