Wideband, multi-frequency ferrite-loaded CBS antennas with non-uniform bias

Simulations and measurements of the input impedances and radiation patterns clearly demonstrate that approximating a severely non-uniform internal magnetic field with the uniform distribution is unacceptable and it leads to very inaccurate predictions. On the other hand, the Non-uniform approach, which does not perform such averaging, yields very accurate predictions, especially when compared with measurements. In addition, it is shown that if some of the significant components of the internal magnetic field are omitted, the predictions become very inaccurate and do not compare well with measurements.