Systematic design of antennas for cylindrical 3D phased array hyperthermia applicator

The purpose of this contribution is to develop high performance short antenna structures which can be used as basic array elements of the 3D phased array for hyperthermia (HT) applications in the pelvis. The numerical design of basic array elements of the 3D HT applicator has been performed in a systematic way applying the finite-difference time-domain (FDTD) method. Some modifications of the FDTD method specific for antenna design have been implemented. Thus, approximations for modelling of thin wires and thin layers have been made as well as source environments suitable for comparisons with network analyzer measurements have been modeled. An additional verification has been performed applying another numerical tool, the volume surface integral equation (VSIE).