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A planar inverted F antenna is combined with passive (reactively loaded) elements in order to implement a multi-frequency conflguration appropriate for biomedical applications in microwave frequencies. A case study of an electronically Reconflgurable PIFA (R-PIFA) is pursued for the detection of temperature abnormalities in human tissue phantom using microwave radiometry, where the performance of the structure is optimized with respect to input impedance matching in multiple frequencies. The optimization of the array is performed using a Genetic Algorithm (GA) tool as a method of choice. Due to its limited physical size, the proposed R-PIFA can also be used as a portable antenna system for deployment in mobile medical applications.

A NOVEL ANTENNA SYSTEM FOR BODY TEMPERATURE CHANGE DETECTION APPROPRIATE FOR MULTI-CHANNEL MICROWAVE RADIOMETRY