Results 31 to 40 of about 10,033,418 (302)
Xi'an Gongcheng Daxue xuebao, 2022 To study the frequency response characteristics of knitted fabric-based frequency selective surface (FSS), high-pass knitted fabric-based FSS were designed and prepared. The electromagnetic transmission characteristics were tested in a microwave anechoic
YANG Zhuli +5 more
doaj +1 more source
Traditional Frequency Selective Surface versus Substrate Integrated Waveguide Frequency Selective Surface [PDF]
Universal Journal of Communications and Network, 2014 This paper is devoted to analysis design and fabrication of both traditional and substrate integrated waveguide (SIW) frequency selective surfaces (FSS) of square elements and square lattice. The transmission loss is studied for different angle of incidence; normal, thirty, forty five and sixty degrees.
I. El-Mongy, A. M. M. A. Allam
openaire +1 more source
Convoluted double square: single layer FSS with close band spacings [PDF]
, 2000 A novel element provides reflection band ratios as low as 1.1. It is derived from the double square but is less demanding on printing definition. Together, the two elements offer increased flexibility in Frequency selective surface design for close band ...
Parker, Edward A. +2 more
core +1 more source
Single-Layer Bandpass Active Frequency Selective Surface [PDF]
, 2008 A single-layer, bandpass, active FSS is presented. It shows good angle of incidence stability for TE incidence, at the operating frequency of 2.45 GHz. It is based on circular loop aperture with each unit cell having four PIN diodes.
Kenneth L. Ford +17 more
core +1 more source
A High-Selective Frequency Selective Surface With Hybrid Unit Cells
IEEE Access, 2018 In this paper, a novel frequency selective surface (FSS) is proposed. It has two metal layers and the configurations of the unit cells of these two layers are different, so-called hybrid unit cells. The designed FSS has three transmission zeros and steep
Yuhong Ma +4 more
doaj +1 more source
Frequency Selective Surface-Based Switched-Beamforming Antenna
IEEE Access, 2018 A novel switched-beamforming antenna designed using active frequency selective surfaces (AFSS) is presented. The antenna consists of two parts: a source with an omnidirectional radiation pattern and a novel active triangular frequency selective surface ...
Ghada Hussain Elzwawi +3 more
doaj +1 more source
3D Absorptive Frequency-Selective Reflection and Transmission Structures With Dual Absorption Bands
IEEE Access, 2018 This paper presents a 3D absorptive frequency-selective reflection structure (AFSR) and absorptive frequency-selective transmission structure (AFST) with one reflection/transmission band and two absorption bands.
Yufeng Yu +6 more
doaj +1 more source
Finite frequency selective surface modelling
The 8th European Conference on Antennas and Propagation (EuCAP 2014), 2014 In this paper we describe the development of an electromagnetic modelling technique to investigate edge illumination effects on finite size FSS performance. The work extends the commonly used unit cell approach and models the FSS as a linear array with Gaussian beam excitation.
Dickie, Raymond +2 more
openaire +3 more sources
IEEE Access, 2021 A 3-D frequency-selective rasorbers (FSR) with wide absorption bands at both sides of the transmission window based on stepped impedance resonator (SIR) is presented and investigated in this article.
Yihao Wang +3 more
doaj +1 more source
A modified Alamouti scheme for frequency selective channels incorporating turbo equalization [PDF]
, 2002 The Alamouti scheme can achieve transmit diversity in the presence of frequency selective flat fading channels. The technique has received considerable attention mainly because of its processing simplicity. Recently, a modification to the Alamouti scheme
Nix, AR +7 more
core +1 more source