http://www.google.com/imgres?imgurl=http://static.flickr.com/98/250173739_6227a92fe8.jpg&imgrefurl=http://offthebroiler.wordpress.com/2006/09/22/electromagnetic-propulsion/&h=423&w=450&sz=48&tbnid=41GwblYc2rDekM:&tbnh=119&tbnw=127&prev=/images%3Fq%3DRoger%2BShawyer&hl=en&usg=__e_u1AZl0-k0gxzgmNHoRMI4_m7M=&ei=3gQhS4GfHZGftgfzq8jUBw&sa=X&oi=image_result&resnum=4&ct=image&ved=0CBwQ9QEwAw
According to ATS China is developing this tech.
maybe their using this tech thats why microwave radar effects their ships and brings them down.