A Dual-Band MIMO Antenna Using Gradient Arcs for Construction Monitoring and Inspection Systems Based on IIoT
Industrial Internet of Things (IIoT) is an evolution that bring great advantages of real-time monitoring and inspection in construction through the sensors as well as wireless equipments. One of the important elements of these equipments is antenna which decides the quality and performance of device over various communication standards. In this paper, a design of dual-band MIMO antenna is proposed. The antenna operates at 1.8 GHz and 2.6 GHz which cover No 3 and No7 of LTE-A bands and No.2, No.3, No.7 and No.38 of 5G NR bands of IoT communication. Basing on FR4 substrate with height of 1.6mm, the antenna get compact in size with radiating patch dimension of 25mm x 21.5mm and very thin which compared to conventional PIFA structure. Using novel adjacent arcs on the surface plane, mutual coupling between radiation elements of MIMO antenna has decreased at both operating bands with narrow distance of 0.13l at 1.8GHz from edge to edge. A good agreement between simulations and measurements are shown in this context.