Apparatus for electromagnetic radiation of living tissue, such as human tissue, or tissue simulating matter, comprises an electromagnetic radiation source having a dynamic frequency range of at least about 5 to 1, and preferably 10 to 1. Electrically connected to the source by a coaxial cable is a broadband...http://www.google.com/patents/US4271848?utm_source=gb-gplus-sharePatent US4271848 - Apparatus for electromagnetic radiation of living tissue and the like