MMP method simulation of antennae with scattering objects in the closer nearfield

The advantages and limits of the multiple multipole (MMP) method applied to problems of antennas with lossy scattering objects in the very close near field are discussed. Difficulties occur because of the concentrated sources that produce high-gradient fields. The capability of the program is shown by two examples: a simulation of a radio held by a man and of an antenna embedded in lossy brain tissue. It is concluded that near and far fields, antenna impedance, absorbed power, and other parameters can be calculated with high accuracy. To overcome some of the limitations of the MMP it needs to be combined with a finite-element or finite-difference approach.<
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