Results 31 to 40 of about 748,247 (314)
IEEE AccessThe advent of graphene has opened new avenues for the design of high-performance metamaterial devices, particularly in the realm of electromagnetic absorption applications.
Rummanur Rahad +3 more
semanticscholar +1 more source
A New Antenna Capable of Generating Broadband Plane Spiral Orbital Angular Momentum
IEEE AccessThe plane spiral orbital angular momentum (PS-OAM), which is a special form of orbital angular momentum (OAM) beams, solves the problem of OAM beam divergence to some extent.
Na Li +3 more
doaj +1 more source
A Compact Broadband Stepped Bow-Tie Antenna for Ambient RF Energy Harvesting
IEEE Access, 2023 This paper presents a compact broadband stepped bow-tie antenna for ambient RF energy harvesting (RFEH). The proposed antenna consists of stepped shapes for wide bandwidth, making it possible to investigate ambient RF energy in entire cellular bands.
Seong-Jin Kim +3 more
doaj +1 more source
Antenna systems for broadband wireless access [PDF]
IEEE Communications Magazine, 2002 Broadband wireless access along with evolving mobile Internet and multimedia services are driving the surge of research and development activities for future wireless communication systems. We provide an overview of antenna systems for broadband wireless communications and introduce some of the important issues surrounding them.
Ross D. Murch, Khaled Ben Letaief
openaire +2 more sources
RF Performance of Layer-Structured Broadband Passive Millimeter-Wave Imaging System
International Journal of Antennas and Propagation, 2016 Low profile and simple configuration are advantageous for RF module in passive millimeter-wave imaging system. High sensitivity over broad operation bandwidth is also necessary to detect right information from weak signal.
Kunio Sakakibara +3 more
doaj +1 more source
Advanced Engineering Materials, EarlyView.This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal +2 more
wiley +1 more source
From Shear to Sound: Mechanics–Acoustics Mapping of TPMS Lattices
Advanced Engineering Materials, EarlyView.Triply periodic minimal surface (TPMS) lattices are mapped across mechanical and acoustic performance, revealing that descriptors validated in compression fail under shear. First‐time comparison with trusses included. A transition from porous to resonance‐driven absorption emerges at 25% density.
Lucía Doyle +3 more
wiley +1 more source
A Design of Double Broadband MIMO Antenna
International Journal of Antennas and Propagation, 2015 The MIMO antenna applied to LTE mobile system should be miniaturization and can work in the current communication frequency band; isolation between each antenna unit also should be good so as to reduce loss of radio wave energy and improve the antenna ...
Yanfeng Geng +3 more
doaj +1 more source
Broadband Circularly Polarized Filtering Antennas [PDF]
IEEE Access, 2018 This paper consists of two parts. The first part presents a review of the recent development in broadband circularly polarized filtering antennas. The second part presents a novel design of broadband integrated filtering antenna based on eighth-mode SIW (EMSIW) resonators for rectenna applications. This work has three main novel contributions.
Yazhou Dong +10 more
openaire +2 more sources
Advanced Engineering Materials, EarlyView.This review highlights advances in lightweight, lead‐free polymer nanocomposites for diagnostic X‐ray shielding. By linking filler chemistry, dispersion, architecture, and photon interaction mechanisms, it establishes structure–performance relationships guiding material design.
Aklilu G. Messele +2 more
wiley +1 more source