Patent ID: 8362961

Claim:
A system comprising: a first sensing device configured to sense at least a first parameter; a first Sterba Curtain configured to receive at least a first incident electromagnetic wave, the first Sterba Curtain configured to selectively transmit and reflect portions of the first incident electromagnetic wave, wherein the first Sterba Curtain includes at least one main loop twisted to create a first number of smaller full-loops and a second number of smaller half-loops, wherein the first Sterba Curtain has substantially greater electromagnetic reflectivity when the at least one main loop of the first Sterba Curtain is closed than when the at least one main loop of the first Sterba Curtain is open; and a first modulating device communicatively coupling the first sensing device to the first Sterba Curtain, the first modulating device configured to alternatively open and close the at least one main loop of the first Sterba Curtain to change the electromagnetic reflectivity of the at least one main loop of the first Sterba Curtain to selectively convey a first signal representing the first parameter by modulating at least one of: a first transmitted component of the first incident electromagnetic wave; and a first reflected component of the first incident electromagnetic wave.