Measurement of Inter-WBAN Interference Power in Dynamic User-Dense Environment Using Wearable ${2\times 2}$ Elements Patch Array Antenna at 15 GHz

The wireless body area network (WBAN) using higher frequency band than the conventional microwave band WBAN suppresses inter-WBAN interference problem in a user-dense environment. In this paper, we propose a propagation loss model with multi-user blocking and compare with the measurement result of the inter-WBAN interference power at dynamic multi-user environment using wearable directional $2\times 2$ elements patch array antenna for WBAN at 15 GHz. The results show that the distribution characteristics vary with the user density, and antenna directivity coefficient with blockage area scheme improves the accuracy of the propagation model.