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In the design and development of wireless devices for body-worn applications, several technical challenges must be addressed to ensure reliable on-body RF propagation. Traditional methods like physical prototype testing and human RF engineering are often used to assess antenna performance, but they can require multiple iterations and may not capture all real-world complexities. This whitepaper demonstrates how Remcom’s electromagnetic simulation technology enables engineers to model animated on-body RF propagation using Huygens surface methodology that captures near-field antenna effects and transfers device radiation patterns to moving human body models within realistic environments.