Results 31 to 40 of about 4,766 (228)
A reconfigurable electrically-small antenna operating in the 'DC' mode [PDF]
, 2003 In this paper, an explanation of the design of an electronically tunable electrically-small antenna, operating in the 'DC' mode is presented. Although this antenna has a narrow instantaneous bandwidth, electronic tuning allows a large band to be covered ...
Craddock, IJ +3 more
core +2 more sources
IET Microwaves, Antennas & Propagation, 2019 A novel reconfigurable metasurface beam‐steerable reflector for satellite communication which covers the entire Ku‐band, and supports 300 MHz bandwidth, is suggested in this work. The reflector is based on a new type of electromagnetic bandgap.
David Rotshild, Amir Abramovich
doaj +1 more source
Tunable Elliptical Split Ring Resonator Using Single Varactor Diode
Advanced Electromagnetics, 2018 In this paper, the effect of changing the structure of split ring resonator SRR from circular to elliptical shape is presented and tested. The theoretical analysis of circular SRR (CSRR) is tested and its results are compared with the simulated ones ...
A. S. Elkorany +3 more
doaj +1 more source
Varactor diode assembly with low parasitic reactances [PDF]
, 1975 Development of varactor diode assembly overcomes parasitic reactances of conventional varactor packages. In specially constructed assembly very high idler-frequency to signal-frequency ratios are used to obtain low-noise operation over maximum ...
Dickens, L. E.
core +1 more source
Advanced Science, EarlyView.Photonic time crystals (PTCs) are systems in which electromagnetic parameters are modulated periodically in time, producing momentum bandgaps via temporal scattering rather than spatial Bragg processes. This review examines the theoretical frameworks, modeling, and computational tools for time‐varying media, and summarizes experimental demonstrations ...
Ranjan Kumar Patel +3 more
wiley +1 more source
A One-Bit Programmable Multi-Functional Metasurface for Microwave Beam Shaping
Micromachines, 2023 In this paper, we demonstrate a multi-functional metasurface for microwave beam-shaping application. The metasurface consists of an array of programmable unit cells, and each unit cell is integrated with one varactor diode. By turning the electrical bias
Wu Zhang +6 more
doaj +1 more source
Efficient millimeter wave 1140 GHz/ diode for harmonic power generation [PDF]
, 1967 Epitaxial gallium arsenide diode junction formed in a crossed waveguide structure operates as a variable reactance harmonic generator.
core +1 more source
Advanced Electronic Materials, EarlyView.This paper reviews the physics of liquid metals in RF devices, including the influence of mechanical strain on resonance as well as fabrication methods and strategies for designing tunable and strain‐tolerant inductors, capacitors, and antennas.
Md Saifur Rahman, William J. Scheideler
wiley +1 more source
Series vs Parallel Reflection-Type Phase Shifters
IEEE Access, 2020 A performance comparison between series and parallel resonant circuits in the Reflection-Type Phase Shifter (RTPS) configuration is presented in this article.
Vitaly Kirillov +2 more
doaj +1 more source
A General and Efficient Framework for the Rapid Design of Miniaturized, Wideband, and High‐Bit RIS
Advanced Electronic Materials, EarlyView.A general and efficient framework is proposed for the rapid design of high‐performance reconfigurable intelligent surfaces (RISs). This framework integrates advanced antenna design techniques and incorporates various load types, quantities, and values to achieve the design of high‐performance RISs.
Jun Wei Zhang +14 more
wiley +1 more source