Metamaterial Inspired Frequency Reconfigurable Antenna for Sub 6GHz Applications

The antenna's design and frequency reconfiguration have a significant impact on its performance, which makes it perfect for a particular use case such as the Internet of Things. In this, study developed a unique metamaterial patch antenna design using a frequency reconfiguration technique. In the study, the metamaterial microstrip patch antenna (MMPA) was deployed in an Internet of Things application utilizing a frequency reconfiguration approach, achieved with the help of a PIN Diode. Changing the bias of two PIN diode switches altered the resonating frequency. An FR-4 substrate with a copper patch forms the proposed antenna. The suggested antenna construction has dimensions of 23 x 19 〖mm〗^2. Two steps are involved in the design of a reconfigurable multiband antenna. The first designed Monopole for a Single Band with a centre frequency of 4.0GHz and the Second designed Multiband using a Rectangular Split Ring Resonator (RSRR) on the Ground Plane which includes two PIN diodes as switches, is evaluated in the ON-ON, OFF-ON, ON-OFF, and OFF-OFF switching scenarios. Antenna performance parameters like Gain, reflection coefficient, radiation efficiency, and standing wave ratio of voltage are used to estimate the presentation of the suggested antenna. At the Operating frequency of 3.6 GHz, the suggested antenna's efficiency and gain are 1.68 dB and 81%, respectively.