Analysis and Characterization of Electromagnetic Reverberation Chamber with Metamaterial Walls

This paper presents the effect of metamaterial walls on the Lowest Usable Frequency (LUF) of a Reverberation Chamber (RC). First, the metamaterial walls are modeled as surface impedance. Then, sensitivity analysis is performed to choose the appropriate surface impedance using the Modal Expansion Theory (MET) to reduce the LUF. Finally, the metamaterial unit cell has been designed and characterized to achieve the impedance requirements. When metamaterials are implemented on two parallel walls of the RC, the LUF can be reduced by almost 5 times compared to the perfect metallic wall reverberation chamber according to simulation.