Wideband Shielding Diaphragm Based on Electrically Small Single-Negative Metamaterial for Package Application

This paper developed a novel diaphragm, which is based on the single-negative (SNG) metamaterial for acquiring broadband compartment shielding performance in the shielding can packages of miniaturized high-speed chip components and circuits. By adopting the developed method, experimental results demonstrate it can well suppress the resonance-dominated-interference between the passive traces in single shielding can. The height and width of shielding can are 5 mm and 20 mm, respectively; the height of diaphragm is only 1.5 mm with an electrically size of $0.1\lambda_{0}$ at 10 GHz; and the measured (simulated) diaphragm can suppress radio-frequency interference (RFI) within 10.2-17 GHz (10-16.9 GHz), and achieve < −33.5 dB (< −40dB) coupling within 100 kHz – 18 GHz (DC - 20 GHz).