Design and dose characteristics of 1-6 GHz radio frequency exposure platform

Abstract

In this study, a broad-spectrum bioelectromagnetic exposure platform was developed and a dose calculation study under the corresponding exposure conditions was performed. The radio frequency exposure platform was in the frequency band of 1-6 GHz, and its principle was based on antenna-exposed electromagnetic fields. At the rated power, the power density at the target was 63.3-149.0 W/m2. Biological electromagnetic dose simulation showed that compared with the rat, the mouse can achieve a whole body average specific absorption rate (WBA SAR) in the range of 1-6 GHz, higher by approximately an order of magnitude. The effect of the top and side irradiation on the WBA SAR was small, with the maximum difference of 0.731 dB and 0.276 dB in the rat and mouse, respectively. Therefore, the WBA SAR of the experimental animals was frequency-dependent and insensitive to changes in the exposure direction. The tissue-specific absorption rate was more sensitive to changes in the exposure direction, with a peak frequency point slightly greater than the resonance frequency point of the WBA SAR. At the maximum exposure values, the maximum dose values of the laboratory animals were assessed. The WBA SARs of the rat and mouse exceeded the occupational standard of 0.4 W/kg. In addition, the WBA SAR of the mouse exceeded the injury threshold of 4 W/kg. The experimental setup utilized here can be used to investigate in vivo effects at frequencies typically applied in occupational operations such as communications and radar.

Keywords

• radio frequency
• exposure
• specific absorption rate
• dose
• characteristics