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胶囊微机电系统在体内所采集到的信号是利用无线信号进行传输的。无线信号有可能无法穿透胶囊外壳和在人体组织内造成剧烈衰减。本文首先从理论上分析了无线信号的频率、天线形状、胶囊外壳材料和人体组织等方面对系统无线信号传输性能的影响,然后计算了2.4 GHz的天线参数,最后对胶囊采用不同形状的天线、外壳材料和在不同的外围人体组织中进行了传输距离的实验研究。
Micro-electromechanical system capsule in the body collected signal is the use of wireless signal transmission. Wireless signals may not penetrate the capsule shell and cause severe decay in human tissues. In this paper, the influence of wireless signal frequency, antenna shape, capsule shell material and human tissue on the wireless signal transmission performance of the system is analyzed theoretically. Then the antenna parameters of 2.4 GHz are calculated. Finally, Shell material and in different peripheral human tissue transmission distance of the experimental study.