Improved matching and SAR reduction with little angular instable AMC based ground plane

A novel uni-planar artificial magnetic conductor (AMC) structure ground plane with optimum sensitivity to incident angle is proposed for body centric communications over the industrial scientific medical (ISM) band (2.4–2.5 GHz) and 4G (Long-term evolution) LTE band 7 (2.5–2.69 GHz). The small variation of the reflection phase with different incidence angle is favorable for approximately stable radiation performance near the prescribed band with maximized in-phase reflections for TE and TM polarizations. The impedance mismatch is minimized considerably when the antenna is placed over human body with the reduction of coupling between them through the AMC grounded structure. Overall the structure is successful in reducing the specific absorption rate (SAR) and enhancing the bandwidth over the singly antenna.