Intelligent reflecting surface (IRS) is a promising new paradigm to achieve high spectral and energy efficiency for future wireless networks by reconfiguring the signal propagation via passive reflection. To reap potential gains of IRS, channel state information (CSI) essential, whereas estimation errors are inevitable in practice due limited training resources. In this paper, order optimize pe...

In this work, a novel multi-objective design optimization procedure is presented for the Minkowski Reflectarray RA s using a complete 3-D CST Microwave Studio MWSbased Multilayer Perceptron Neural Network MLP NN model including the substrate constant εr with a hybrid Genetic GA and Nelder-Mead NM algorithm. The MLP NN model provides an accurate and fast model and establishes the reflection phas...

A general technique for synthesizing both planar and conformal beamforming metasurfaces is presented that utilizes full-wave modeling techniques rapid optimization methods. The synthesized consist of a patterned metallic cladding supported by finite-size grounded dielectric substrate. are modeled using integral equations which accurately account mutual coupling the metasurface's finite dimensio...

This work presents a dual-band high-gain shared-aperture antenna. The proposed antenna integrates both the Fabry-Perot and reflectarray mechanisms; works as cavity (FPCA) in S-band (2.45 GHz) (RA) X-band (10 GHz). has simple structure made up of only two printed circuit board layers. bottom layer acts source antenna, ground plane for FPCA, reflective surface RA. upper contains RA serves partial...

A double-layer element consisting of a spider-shaped structure on the top layer and pair concave arms with circular ring middle is proposed for wideband reflectarray low cross-polarization characteristics. The unit cell offers linear wider phase range 800∘. Based cell, an offset-fed octagonal aperture comprising 6769 cells constructed at 11.725 GHz. 1 dB 3 gain bandwidths 25.2% 32.3%, respectiv...