Design of an impedance matched near field passive antenna for medical microwave radiometry

The paper presents the numerical design and analysis of a compact microstrip patch antenna with superstrate for medical microwave radiometry at 1.3 GHz. The antenna design was optimized to obtain at least-10 dB power reflection coefficient, 100 MHz bandwidth centered at 1.3 GHz and localized power reception from deep seated tissue in homogeneous and layered tissue models mimicking the dielectric properties of the breast. Simulation results indicate that the optimized antenna with low loss superstrate meets the design criteria for passive deep tissue thermometry.