Theoretical Analysis of the Biological Thermal Effect of Millimeter Waves in Layered-Dielectric-Slabs

The theory is presented for one method of determining the biological thermal effect of millimeter waves in microwave radiometry. It has been studied theoretically that millimeter waves propagation and absorption in a human body. The model is a plane straticulate homogeneous slab of tissues under the irradiance of normal incidence plane wave. It has been discussed by obtaining the electromagnetic field, absorbent power, specific absorption rate, temperature field and their distributions in the human trunk model. Also, the principle of thermal therapeutics of millimeter waves to cancer has been discussed preliminarily.     

Measurement of Scattering Characteristics of Background Target at MM-Band

The relative scattering characteristics of different type background target had been measured with replacement method at 94GHz. It was shown that the index of reflection of non-metal target is about 3-10 per cent of that of metal target, and the relative index of reflection of target will increase with the increase of its humidity.