A New Circular Slot Based Dual Frequency Band Reconfigurable Antenna for 5G and Wi-Fi Applications

This work purports a unique reconfigurable antenna with a compact and simple structure and functions at two different frequencies viz 5GHz (Wi-Fi applications) and 28GHz (mmWave 5G) making it very suitable for present day mobile applications. The antenna structure comprises of two patches viz a main radiating circular patch and one subsidiary rectangular patch which is connected to the main radiating patch through a PIN diode. In the OFF mode of the PIN diode, the antenna operates at 5GHz and in the ON mode of the PIN diode, the antenna radiates at 28GHz. The antenna is imprinted on FR4 material with the relative permittivity of 4.4 and the total footprint of 30×30×1.6 mm
³
. The antenna exhibits an excellent gain for both the desired frequencies.