Algorithm Analysis of Electromagnetic Wave Power Density Measurement for Millimeter-Wave Irradiators in Bioelectromagnetic Experiments

In experiments exploring effects of millimeter-wave (MMW) irradiation on biological materials where MMW irradiators are used, the electromagnetic wave (EMW) power density (PD) in the vicinity of the irradiators where the biological materials are placed is an important parameter to be considered so as to determine the irradiation dose. The paper provides a practical algorithm to measure the EMW PD in the vicinity of MMW irradiators with relatively high accuracy and precision. Besides theoretically analyzing and designing the measurement algorithm, a computer program aimed at facilitating the computation is provided after solving problems such as applying sampling theorem and Fast Fourier Transform (FFT). The algorithm and the program were fully tested when an experimental measurement of the EMW PD in the vicinity of a typical MMW irradiator was performed.