Abstract This paper presents the methodology, development, and implementation of double concentric ring band-pass frequency selective surface (FSS) based spatial filters. The filters are designed to improve active responses 5G antennas by incorporating them as superstrate or substrates. A comparable circuit model is used anticipate resonant bands required for predicting FSS behavior. filter com...

Nowadays, broadband and multi-channel radio frequency (RF) processing has been widely used in communication, radar, countermeasure, other applications. At present, multiple-input multiple-output (MIMO)-oriented microwave photonic signal technology is relatively scarce, so this paper proposes an RF selective switch (FSS) based on multiple phase modulation to intensity (PMIM) conversions. PMIM co...

We propose a circular polarizer with beamforming features based on frequency selective surface (FSS), in which a modified anchor-shaped unit cell is used to reach the circular polarizer function. The beamforming characteristic is realized by a particular design of the unit-phase distribution, which is obtained by varying the scale of the unit cell. Instead of using plane waves, a horn antenna i...

This article presents a novel method for the forward modeling and inverse design of class Schiffman phase shifters using deep neural networks (DNNs). Since DNNs are capable mapping highly nonlinear correlations between inputs outputs, we constructed fully connected DNN to predict electromagnetic (EM) responses given their physical dimensions. Based on this fast accurate tool, cascaded was then ...

A frequency selective surface (FSS) comprising of a two dimensional array of dipole apertures, resonant at two frequencies, within a metallic screen is proposed. A computationally efficient method for analyzing this FSS is used. The formulation is carried out in the spectral domain where the convolution form of the integral equation for the induced current reduces to an algebraic one and the Sp...

A spatial bandpass filter resonant at 1.5 m and based on a frequency-selective surface (FSS) was analyzed and fabricated. It consists of circular apertures arranged in a hexagonal lattice and was modeled using a hybrid finite-element/boundary-integral method, which accounted for metal thickness and conductivity. Measurements demonstrate the accuracy of the design. © 2004 Wiley Periodicals, Inc....

This paper deals with theoretical investigation on a compact frequency selective surface with multiple resonant frequencies. In this paper the FSS is designed by modifying square patch nearly similar as ‘H’ shaped patch and then cutting hexagon shaped slot within it. 94.93% size reduction is achieved in this design. Three resonant frequencies have been obtained in this design. Theoretical inves...

Convoluted elements on a frequency selective surface (FSS) allow for low to be contained in physically smaller unit cells. Smaller cells give the FSS greater angular stability, especially where curved is required, and so unwanted grating effects are avoided. A convoluted element with rejection band centred at 2 GHz cell area of 15 mm by ( $0.10\,\,\lambda \times 0.10\,\,\lambda$ ) has been deve...