US Patent 7741933 - Electromagnetic composite metamaterial

http://www.freepatentsonline.com/7741933.html

This patent from Charles Stark Draper Labs teaches a system to implement a metamaterial based on an array of MEMS piezoelectric resonators. Claim 1 reads:

1. An electromagnetic composite metamaterial comprising:

an electromagnetic medium; and

a plurality of spaced electromechanical resonators disposed in or on the electromagnetic medium configured to control electromagnetic wave propagation properties in the electromagnetic composite metamaterial.