The Washington Times 
July 22, 2011
China’s military is developing electromagnetic pulse weapons that Beijing plans to use against U.S. aircraft carriers in any future conflict over Taiwan, according to an intelligence report made public on Thursday.
Portions of a National Ground Intelligence Center study on the lethal effects of electromagnetic pulse (EMP) and high-powered microwave (HPM) weapons revealed that the arms are part of China’s so-called “assassin’s mace” arsenal – weapons that allow a technologically inferior China to defeat U.S. military forces.
EMP weapons mimic the gamma-ray pulse caused by a nuclear blast that knocks out all electronics, including computers and automobiles, over wide areas. The phenomenon was discovered in 1962 after an aboveground nuclear test in the Pacific disabled electronics in Hawaii.
The declassified intelligence report, obtained by the private National Security Archive, provides details on China’s EMP weapons and plans for their use. Annual Pentagon reports on China’s military in the past made only passing references to the arms.