Measurement of Wireless on Body Propagation Characteristics from e-Health Monitoring Wearable Device

The wearable medical device which is worn on the human body can affect electromagnetic (EM) propagation due to the absorption properties of the human body. Therefore, it is essential to investigate this occurrence, especially in monitoring medical devices, namely smartwatches when it is attached to the human body. The characteristic measurements of wireless on-body propagation which is carried out are S
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, radiation pattern, and path loss. The human wrist is modeled with a phantom filled with human tissue liquid equivalent, while the smartwatch is modeled with a planar inverted F antenna. The characteristics of S
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, radiation pattern, and path loss are presented in this paper. All characteristics indicate the human body affects the performance and propagation of the smartwatch.