Investigation of the Characteristics of a 5.2 GHz Textile Antenna on a Human Body

In recent years, in a hospital, a biological information monitoring system that constantly monitors biological information such as blood pressure and heart rate to grasp a patient's condition is generally used. However, in the current system, 420 to 450 MHz band are mainly used, and it is difficult to manage such as channel switching and device addition/deletion to wireless communication experts. Also, there is a problem that a transmitter having a size as large as a small terminal must be carried around. Therefore, we proposed the textile antenna using the 5.2 GHz band as a transmitting antenna of the system. In this paper, we report on the antenna characteristics when a transmitting antenna designed by the authors is placed on the human body and the result of received power transmitted by the textile antenna analysis in an imitated actual environment model.