A Novel and Compact Centrosymmetric EBG Structure for Multiband Power Noise Suppression

In this article, a novel and compact centrosymmetric mushroom electromagnetic bandgap (EBG) structure is proposed for multiband power noise suppression. Different mushroom patches are integrated in a compact unit cell in a centrosymmetric pattern to generate multiple stopbands. The stopbands can be easily designed and adjusted by the area ratio of different subpatches and scaling. The most obvious advantages of the proposed method are compact in structure and easy in design, especially for tri-band and four-band stopband power noise suppression. EBG structures with double bands, treble bands, and four bands are designed and fabricated. Measurements and simulations are performed to verify the multiband characteristic, and good agreement is observed. This structure provides a simple, compact, and attractive solution for multiband power noise suppression with more than three bands.