Millimeter wave irradiation and invasion into living bodies using waveguide vent antenna with multilayers

The microwave invasion to living bodies at a millimeter wave catheter irradiation is described. The power sources of millimeter wave are an Impatt oscillator (94 GHz, 0.3 W) for the irradiation tests and a Gunn oscillator (90 GHz, 13 mW) for the reflection study. Irradiated samples are cow livers and living rats. The irradiation antenna used is a waveguide vent antenna with anti-reflecting multi layers.