Results 41 to 50 of about 5,321 (175)
Implementation of Reconfigurable, Planar Meander Antenna for WLAN Applications
Journal of High-Frequency Communication Technologies, 2023 This paper presents the implementation of Reconfigurable, Planar Meander Antenna operates at 2.45 GHz and 5.12 GHz for WLAN applications. In the proposed work the planar meander antenna is designed using FR4 substrate. In the meander antenna the varactor
Bhuvaneswari B +3 more
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Recent Advances in Programmable Metasurfaces and Meta‐Devices
Advanced Electronic Materials, EarlyView.Programmable metasurfaces enable various novel functionalities by dynamically tuning electromagnetic wavefronts. This article provides a comprehensive review of recent advances in microwave and terahertz programmable metasurfaces, covering electrical, thermal, optical, and mechanical control mechanisms.
Linda Shao +4 more
wiley +1 more source
Parametric Conversion Using Custom MOS Varactors
EURASIP Journal on Wireless Communications and Networking, 2006 The possible role of customized MOS varactors in amplification, mixing, and frequency control of future millimeter wave CMOS RFICs is outlined. First, the parametric conversion concept is revisited and discussed in terms of modern RF communications ...
Iniewski Krzysztof (Kris) +3 more
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Nanophotonics, 2021 We propose an ultrathin reconfigurable Mach–Zehnder interferometer (MZI) for realizing dynamic frequency and amplitude modulations of spoof surface plasmon (SSP) signal.
Cui Wen Yi +3 more
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Advanced Electronic Materials, EarlyView.A compact passive engineered surface converts changes in microwave frequency into many distinct illumination patterns, allowing nearby objects to be imaged without mechanical scanning, active tuning, or a large antenna array. Operating from 18 to 28 GHz, the single‐port system uses measured field patterns to reconstruct metallic targets and distinguish
Mohammed H. Arif +6 more
wiley +1 more source
Physical Unclonable Functions From Microwave Metasurface Fingerprints
Advanced Electronic Materials, EarlyView.Nominally identical metasurfaces fabricated through standard PCB processes inevitably contain microscopic fabrication imperfections. This work demonstrates that these unavoidable electromagnetic deviations can serve as unique physical unclonable fingerprints for wireless authentication.
Guanxiong Shen +4 more
wiley +1 more source
Enhancing parameters of silicon varactors using laser gettering
Tekhnologiya i Konstruirovanie v Elektronnoi Apparature, 2018 The authors investigate how and why defects influence the inverse characteristics of varactors. The paper presents experimental results on the effect laser gettering has on the electrical parameters of varactors.
I. M. Vikulin +5 more
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EcoEnergy, EarlyView.Oxide perovskites (ABO3) have emerged as paradigm‐shifting materials for solar energy conversion, uniquely combining ferroelectric polarization, piezoelectric response, and tunable optoelectronic properties. This review comprehensively examines how controlled structural distortions generate built‐in electric fields that overcome ultrafast charge ...
Xu Qian +6 more
wiley +1 more source
Magnetic Resonance in Medicine, EarlyView.ABSTRACT Purpose Ultra‐high field (≥ 7 T) and 3 T MRI suffer from B1+ inhomogeneity and signal loss. Conventional metasurfaces that mitigate B1+ inhomogeneity and improve image SNR are “fixed” in nature and designed for a single Larmor frequency. This study demonstrates the feasibility of an adaptive metasurface utilizing voltage‐controlled capacitors ...
Paul S. Jacobs +7 more
wiley +1 more source
Frequency Agile Radial-Shaped Varactor-Loaded Reflectarray Cell [PDF]
Radioengineering, 2016 An equivalent circuit approach is adopted in this paper to analyze a novel varactor loaded phasing line, specifically designed to improve the frequency agility features of reconfigurable aperture-coupled reflectarray cell, through the use of a couple of ...
F. Venneri +4 more
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