A study of perturbations due to antennas in close proximity with the human body and body simulating liquid filled phantoms at 1.8GHz

This paper deals with perturbations caused to the matching of a simple generic square planar patch in close proximity with a human male torso and a rectangular box phantom filled with tissue simulating liquid. The operating frequency is 1.8 GHz and the isolated variable is return loss (S₁₁). Results presented here are useful in assessing optimal antenna/body separation for wearable antennas in body area networks using both intra and inter wireless connectivity. Research indicates that a flat section phantom will tend to produce an optimal return loss closer to its surface than an actual human test subject.