Design, Simulation and Analysis of a High Gain Small Size Array Antenna for IoT Applications

The purpose of this investigation is to assess various properties of the antenna at 28 GHz, such as return loss, Voltage Standing Wave Ratio (VSWR), gain, bandwidth, surface current, and radiation pattern values. The antenna properties were developed through simulations using CST software. Rogers 5880 substrates with a dielectric constant (εr) of 2.2 and a substrate thickness (h) of 0.508 mm were utilized, along with copper patches having a thickness of 0.035 mm. Initially, single antennas were designed to achieve the desired parameters, followed by the creation of antenna arrays such as 1 × 2, 1 × 4, and 1 × 8. The objective of planning the array antenna is to enhance both the antenna gain and directivity. The simulation results demonstrate incremental values for single antennas, 1 × 4 antenna arrays, and 1 × 8 antenna arrays. The return loss values achieved are –58 dB, –38 dB, and –34 dB respectively. Additionally, the gain values obtained are 7.3 dB, 12.5 dB, and 15.3 dB respectively. Furthermore, the antenna bandwidth is measured at 0.7 GHz, 0.82 GHz, and 1.5 GHz respectively.