3D structure band-pass filter implementation by vias and power/ground plane effect on testing load board

According to the design rule of process, the research presented a novel embedded filter for testing load board application. This structure is designed by the effect between vias, power and ground planes. The transmission line on print circuit board would not be influenced. In this paper, the rule of dimension for design band-pass filter is proposed. The simulation results of three operating frequencies are as following: the bandwidth of 1.95GHz filter is 23.2%, pass band insertion loss is -1.18dB and return loss is -13.39dB; the bandwidth of 2.52GHz filter is 30.1%, insertion loss is -1.05dB and return loss is -22.1dB; the bandwidth of 5.3GHz filter is 23.2%, insertion loss is -1.43dB and return loss is -14.99dB.