Broadband Noise Suppression Using a Hybrid Photonic Crystal Power/Ground Plane Substrate

A novel hybrid photonic crystal power/ground layer (H-PCPL) concept is proposed with broadband power noise isolation (or suppression) performance. Two different hybrid approaches are investigated, one is fixed radius but varied pitch for the high-DK disc and the other one is varied radius and pitch for the disc. It is found the first approach can enhance the bandwidth of the noise rejection but can not obtain a continuous and wide stopband because there is an absolute passband between two gaps. However, the second approach can obtain a continuous and wide stopband by mixing two radius of the disc. Gap map of the photonic crystal lattice is employed to synthesize the stopband profile in both approaches. As an example, a wide stopband ranging from 2.8 GHz to 7.9 GHz can be achieved based on two kinds of radius, 2 mm and 1.45 mm, under the same disc pitch 10 mm.