A Design Of Intelligent Reflecting Surface Using Spidron Structure For 6G Applications

Intelligent reflecting surfaces (IRSs), which are 2-D structures comprising numerous unit cells, have emerged as one of the pivotal technologies for the sixth generation (6G) of wireless communication networks. By dynamically tuning the amplitude and phase shift of each unit cell, IRSs provide an opportunity to reshape and control the reflective wave. For this reason, we can convert propagation environment into part of the network design parameters that are subject to optimization. In this paper we presents design of an IRS using spirdron structure for 6G applications. Firstly, we provide requirements of designing a new IRS in three key metrics, including unit-cell size, number of unit cell states, and IRS panel size. And then, a genetic algorithm is used for calculating the desired beam directions which are engineered with the proper phase states of each unit cell. Subsequently, a novel spidron structure is designed for 2-bit unit cell of IRS with size of 0.33λ × 0.33λ a 2.6 GHz. Thank to spidron shape, the features of IRS include light weight, wide scanning angle, and high scan resolution. For demonstration, an IRS panel with 34×10 cells are computationally investigated and the simulations result in a scan resolution of 10° and scan angle up to ±60° with peak gain of 22.6 dBi.