Errors Correlation in Near-Field Focused Arrays for Biosafe Microwave Applications

The most common errors in antenna arrays are those affecting the magnitudes and phases of the excitation coefficients, as well as those related to faults occurring in the radiating elements. Such errors can affect the performance of near-field focused arrays by causing relatively high levels of the electric field even into unwanted regions. Obviously, this aspect is also harmful in receiving mode. This can be a severe problem if applied to a biomedical context, where field levels must be properly controlled to ensure biological integrity. Correlations between magnitude errors as well as between phase errors are analysed in the present work, to take into account simultaneous effects produced by the same components and/or phenomena.