Millimeter wave irradiation and invasion into living bodies using AR waveguide vent antennas and Gyrotron

The microwave invasion into living bodies at a millimeter wave irradiation using gyrotron as the radiation power source is described. The irradiation antennas of the system consist of a Teflon rod dielectric antenna, and a Teflon sheet dielectric antenna set at 2.4 - 5.0 mm diameter catheter waveguide vent. Preliminary measurements on the denaturation distribution of irradiated caw livers suggest that they are suitable for common irradiation apparatus for living bodies in similar case as previous report. [1,2] The power absorption of a living body surface is large in these wavelength regions, because the reflections of the wave are well hold down (impedance-matching) by the anti-reflecting layers (ARL) of dielectrics. [3] We measured the power changing of millimeter wave with ARL antennas thickness by some TE modes using gyrotrons. Transmission tests through catheter waveguides confirm the normal operation of the irradiation apparatus for living bodies.