Title :
Deeper-penetrating wave applicator in noninvasive hyperthermia
Author :
Li, L.L. ; Taylor, L.S.
Author_Institution :
Dept. of Electr. Eng., Maryland Univ., College Park, MD, USA
Abstract :
The penetration depth of an electromagnetic wave into a lossy medium can be greatly enhanced in the near-field zone of a suitably designed applicator with transient excitation. In the far field of the applicator, EM energy may also decay relatively slowly. A study is made of the decay of EM power in a nondispersive lossy dielectric, and numerical calculations are carried out for the waves in dispersive high-water-content tissue. The potential for applications of this method is discussed.<>
Keywords :
biomedical equipment; biothermics; radiation therapy; EM power; dispersive high-water-content tissue; electromagnetic wave; near-field zone; nondispersive lossy dielectric; noninvasive hyperthermia; penetration depth; transient excitation; Applicators; Biological materials; Biological tissues; Dielectric losses; Dielectric materials; Dispersion; Electromagnetic transients; Hyperthermia; Missiles; Transmitting antennas;
Conference_Titel :
Microwave Symposium Digest, 1990., IEEE MTT-S International
Conference_Location :
Dallas, TX
DOI :
10.1109/MWSYM.1990.99640
