Results 51 to 60 of about 9,979 (227)
Generalized Parity-Time Symmetry Condition for Enhanced Sensor Telemetry
, 2018 Wireless sensors based on micro-machined tunable resonators are important in a variety of applications, ranging from medical diagnosis to industrial and environmental monitoring.The sensitivity of these devices is, however, often limited by their low ...
Alù, Andrea +6 more
core +1 more source
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
Terahertz Channel Modeling, Estimation and Localization in RIS‐Assisted Systems
Advanced Electronic Materials, EarlyView.Reconfigurable intelligent surfaces have become a recent intensive research focus. Based on practical applications, channel strategies for RIS‐assisted terahertz wireless communication systems are categorized into three different types: channel modeling, channel estimation, and channel localization.
Hongjing Wang +9 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
doaj
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
doaj
Planar Inverted-F Antennas (PIFA) for multiband wireless applications [PDF]
, 2010 This is a post-print version of the article - Copyright @ 2010 IEEEA compact reconfigurable four bands Planar Inverted-F Antenna (PIFA) is presented for Digital Video Broadcasting – Handheld (DVB-H), Universal Mobile Telecommunications System (UMTS ...
AbuTarboush, HF, Nilavalan, R, Peter, T
core
Dual band, low profile and compact tunable frequency selective surface with wide tuning range
, 2018 In this paper, a dual polarized, dual band, low profile, embedded bias network, and compact tunable varactor band pass frequency selective surface (FSS) is designed with a wide tuning range.
Mohammad-Ali-Nezhad, Sajad +3 more
core +1 more source
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
Nonlinear symmetry breaking in photo-metamaterials
, 2017 We design and analyze photo-metamaterials with each meta-atom containing both photodiode and light-emitting diode. Illumination of the photodiode by the light-emitting diode gives rise to an additional optical feedback within each unit cell, which ...
Belov, Pavel A. +4 more
core +1 more source
Transmitter Architectures Based on Near-Field Direct Antenna Modulation [PDF]
, 2008 A near-field direct antenna modulation (NFDAM) technique is introduced, where the radiated far-field signal is modulated by time-varying changes in the antenna near-field electromagnetic (EM) boundary conditions. This enables the transmitter to send data
Babakhani, Aydin +2 more
core +1 more source