A Study on Effective Suppression of Electromagnetic Field by an Absorbing Material Inserted into a Cavity Resonator

Abstract

Validity of finite difference time domain (FDTD) method is examined by evaluating the absorption performance from the variation of Q factor under the condition that the absorbing material is inserted into a cavity resonator. The magnetic field distribution in a cavity resonator is visually observed. As a result, we confirmed that the decreasing rate of Q factor was agreed with the calculated and measured results, and both corresponded in the difference in 2 percent. Consequently, validity of FDTD method for examination mentioned above is confirmed. We confirmed that magnetic field distribution in the cavity resonator was drastically weaken when the absorbing material is inserted into the cavity resonator.