Authors´ Reply

We thank the author of [1] for providing us the occasion to explain more in detail the procedure we have adopted in the numerical simulations presented in [2]. Specifically in [1], it is claimed that “it is not possible to calculate accurately the far field radiated by an antenna laying in an interface air-dielectric radiating in a semi-infinite substrate using CST software”. This is a statement which contradicts our experience since we have found in many works that MS CST1 provides accurate results for such configurations. In order to perform simulations of antennas at the interface between two dielectrics, the antenna (dipole or slot) should be placed between an air and a dielectric box which are closed in open boundaries to recreate infinite media. CST discredits the whole volume to compute the fields in this volume. The fields and impedance on either the dipole or slot are then well simulated. Some discrepancies could be found if the thickness of the air box is small in terms of the wavelength and the antenna radiates significant power into the air medium, which is not the case for the antennas studied in [2].