Flat ribbon cable vs cylindrical cable

Modeling a Powerbus and Cable with HFSS

A flat ribbon was used to approximate the round wire cable. The width of the ribbon was 4 times the radius of the round wire. Figures 1- 4 present the calculated far field radiation from the two cable models. It was observed that the flat ribbon approximation produced similar results.

Fig. 1. Electric fields from different cable models, θ=0^°, φ=0^°

Fig. 2. Electric fields from different cable models, θ=90^°, φ=0^°

Fig. 3. Electric fields from different cable models, θ=90^°, φ=90^°

Fig. 4. Electric fields from different cable models, θ=90^°, φ=180^°