Results 31 to 40 of about 56,526 (292)

Signal and System Design for Wireless Power Transfer : Prototype, Experiment and Validation [PDF]

open access: yes, 2020
A new line of research on communications and signals design for Wireless Power Transfer (WPT) has recently emerged in the communication literature. Promising signal strategies to maximize the power transfer efficiency of WPT rely on (energy) beamforming,
Clerckx, Bruno   +2 more
core   +2 more sources

Sub-6GHz 4G/5G Conformal Glasses Antennas

open access: yesIEEE Access, 2019
The difficulty of antenna design applied to glasses is that the structure of glasses is too single, and the space available for antenna design is greatly limited. In this background, the integrated design of 4G antennas and 5G antennas applied to glasses
Yan-Yan Wang, Yong-Ling Ban, Yanhui Liu
doaj   +1 more source

Pure dipole radiation via exact solution of Maxwell's equations with spherical source electric current density

open access: yesIET Radar, Sonar & Navigation, 2021
Magnetic loop antennas are valuable for low frequency radar and communications applications, especially for frequencies below 1 MHz. The present paper examines a possible new type of magnetic antenna which is based on a spherical distribution of source ...
David Alan Garren
doaj   +1 more source

Transmit Diversity Assisted Space Shift Keying for Colocated and Distributed/Cooperative MIMO Elements

open access: yes, 2011
Space Shift Keying (SSK) modulation is a recently proposed MIMO technique, which activates only a single transmit antenna during each time slot and uses the specific index of the activated transmit antenna to implicitly convey information.
Hanzo, Lajos   +3 more
core   +1 more source

Planetary Radio Interferometry and Doppler Experiment (PRIDE) Technique: a Test Case of the Mars Express Phobos Fly-by. 2. Doppler tracking: Formulation of observed and computed values, and noise budget [PDF]

open access: yes, 2017
Context. Closed-loop Doppler data obtained by deep space tracking networks (e.g., NASA's DSN and ESA's Estrack) are routinely used for navigation and science applications.
Bocanegra-Bahamón, T. M.   +7 more
core   +3 more sources

Double Loop Inductive Feed Patch Antenna Design for Antimetal UHF RFID Tag

open access: yesInternational Journal of Antennas and Propagation, 2019
Planar UHF RFID antimetal tag can be widely used for the metallic products or packages with metal material inside. A double loop inductive feed planar patch antenna is proposed for UHF RFID tag mounted on metallic objects.
Lingfei Mo, Chenyang Li
doaj   +1 more source

Mathematical models of spheroidal spiral-frame radiating structures

open access: yesФизика волновых процессов и радиотехнические системы, 2023
The article considers mathematical models of two spheroidal spiral-frame emitters, built on the basis of a general approach involving the use of an integral representation electromagnetic field.
Dmitry P. Tabakov, Ruslan M. Valiullin
doaj   +1 more source

Design of a Wideband Inductively Coupled Loop Feed Patch Antenna for UHF RFID Tag [PDF]

open access: yes, 2015
A planar wideband patch antenna for ultra-high frequency (UHF) radio frequency identification (RFID) tag for metallic applications is presented in this research work.
Bashri, M. S. R.   +2 more
core   +2 more sources

Design of an electrically small printed square loop antenna for closely spaced Tx/Rx systems

open access: yesIET Microwaves, Antennas & Propagation
A highly miniaturised electrically small square loop antenna has been designed for operation at 2.5 GHz. The antenna is loaded using a simple series combination of two lumped inductors and two interdigitated capacitors in order to realise inherent ...
Nhat Truong   +2 more
doaj   +1 more source

Revealing the structure of land plant photosystem II: the journey from negative‐stain EM to cryo‐EM

open access: yesFEBS Letters, EarlyView.
Advances in cryo‐EM have revealed the detailed structure of Photosystem II, a key protein complex driving photosynthesis. This review traces the journey from early low‐resolution images to high‐resolution models, highlighting how these discoveries deepen our understanding of light harvesting and energy conversion in plants.
Roman Kouřil
wiley   +1 more source

Home - About - Disclaimer - Privacy