Accuracy of asymptotic techniques for on-body channel characterization at W band

Wireless Body Area Networks (WBANs) are an established filed of research and continue to attract interest from both the scientific community and the industrial world. They have been extensively studied at frequencies up to X Band, including Ultra-Wide Band (UWB) applications. However, the interest in higher frequencies has been recently increasing, in particular for the realization of on-body systems at V and W band. The research on the on-body propagation channel at such frequencies is its infancy, and presents several challenges, such as the significant computational effort required by full-wave simulations. Given the large electrical dimensions of the human body at millimeter wave frequencies, asymptotic methods offer a promising alternative: however, their accuracy should be carefully evaluated. This paper presents a comparison between measured and simulated results for the path loss characterization of the belt-to-chest link at 94GHz.