Electromagnetic interaction of antennas modeled by infinitesimal dipoles with passive or active objects

In this paper, we study the performance of the obtained set of dipoles by comparing the fields radiated by them with the field obtained using a commercial full-wave solver. A calibration procedure was proposed to construct a realization of ideal dipoles within WIPL-D. Then, the interaction of the dielectric resonator antennas (DRA) with real environments is studied using the equivalent dipoles instead of the real antenna, assuming that the direct coupling between the antenna and the structure does not change significantly the antenna equivalent current distribution. Therefore, the equivalent set of dipoles is still a valid representation of the antenna in the presence of other structures. Here, the interaction effect of the equivalent set of dipoles is studied to show the validity of this concept and their limitations. Our intension is to create a library of several antennas that can be used with some commercial software to speed up computations and simplify the design of some applications. Such a library could be used with high frequency techniques. Then, without the need for hybrid techniques the interactions of complicated objects with complicated antennas can easily be studied. However, most of the commercial software packages have no implementation of the infinitesimal dipoles as a possible excitation source. Therefore, we try to find a more practical numerical model for the infinitesimal dipole that can be modeled with certain wires implemented in these software packages. In the near future, this model will be used in microwave imaging of the breast cancer detection when frequency domain techniques are used