Fractal Antenna Systems have cloaked a man at a wide range of microwave frequencies. The cloaking is very effective from the 700 to 1250 Mhz range. A person is an obstacle with 7 to 20 decibels of attenuation (loss of a lot of the microwave signal). When the person is inside the cloak (a cylinder) the microwaves a routed around and there is almost no signal loss.
If you liked this article, please give it a quick review on ycombinator or StumbleUpon. Thanks