Fractal resonator based frequency Reconfigurable Antenna with varying capacitive effect for wireless applications

Abstract

A frequency reconfigurable antenna for wireless applications using fractal antenna structure is proposed.  The fractal antenna is composed of step resonator type which has mirror image at vertical axis in the top with slit and parallel mirror image at vertical axis in the bottom without slit. The resonating frequency of the fractal antenna is controlled by PIN diode. Two PIN diodes are connected between the top and bottom fractal. With the varying capacitance effect the four possible modes of operation of the diode is obtained at the dual resonating frequency of 2.7 and 3.2 GHz. The proposed design holds significant potential for applications 5G NR n1 band, and Wi-Fi access points due to its small size and easy control mechanism. The SAR values were analyzed and are within the safety limits.