A characterized human chest model is modified to investigate the impact of sternotomy wires on the transmission of ultra-wideband (UWB) in a wireless body area network (WBAN). Figure 2.61a shows the original model that consists of the layered models of cloth, skin, fat, muscle, sternal, bone, and heart in chest; note that different layers correspond to different dielectric properties in the simulation. Figure 2.61b and c show the models of wires and heart valve that will be mounted on sternal and heart, respectively. Modify the simulation model by inserting wires in the chest model so that it can be used for the numerical simulation of signal transmission (Särestöniemi et al. 2019).
In an assembly model, the interference of solid objects must be eliminated. When a new part is inserted, possible interferences should be detected. When an interference is identified, it can be eliminated by adding a cavity feature at the assembly level. Figure 2.61d shows the assembly model is modified in such a way that the cavity features are created in the part models of heart, sternal, fat, bone, and muscle; these cavities are used to accommodates the heart valve and wires without interference.