Results 21 to 30 of about 777 (161)
Retrodirective Antenna Array Using High Frequency Offset
Radioengineering, 2012 The paper deals with the design of a simple retrodirective antenna array exhibiting by high frequency offset between received and transmitted wave. Analysis of the beam pointing error using antenna array model developed in MATLAB is described.
P. Sindler, M. Pokorny
doaj +1 more source
A Complete System of Wireless Power Transfer Using a Circularly Polarized Retrodirective Array [PDF]
Journal of Electromagnetic Engineering and Science, 2020 A complete system of wireless power transfer using a circularly polarized retrodirective array is presented. A dual frequency, active retrodirective array is proposed for a transmitter system.
Mohammad Fairouz, Mohammad A. Saed
doaj +1 more source
A Study on Automatically Target-Chasing Microwave Power Transfer Systems in Multipath Environments
Energies, 2022 In this paper, we propose novel retrodirective systems to improve the efficiency and safety of microwave power transmission (MPT) systems in multipath environments.
Naoki Shinohara, Taichi Sasaki
doaj +1 more source
Possibilities to use retrodirective antennas in radar systems [PDF]
Vojnotehnički Glasnik, 2012 Possibilities to use retrodirective antennas in modern radar systems are presented in this paper. The basics of retrodirective theory, practical realizations of retrodirective arrays using corner reflectors, Van-Atta and heterodyne elements are ...
Aleksandar M. Pavić, Veljko Z. Nikolić
doaj +1 more source
Ka-Band Rotman Lens-Based Retrodirective Beamforming System for Wireless Power Transfer [PDF]
Journal of Electromagnetic Engineering and Science, 2021 A retrodirective beamforming system (BFS) based on a Rotman lens is proposed for far-field wireless power transfer at Ka-band. The true-time-delay property of the Rotman lens allows for a wideband operation covering 28–38 GHz.
Hayoung Hong +8 more
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Method of Four-Element Retrodirective Cross-Eye Jamming Based on DoA
IEEE Access, 2020 The cross-eye method is commonly used to interfere monopulse radars. To overcome the strict tolerance and the range limitation of the traditional retrodirective cross-eye method and the multi-loop method, a novel four-element retrodirective cross-eye ...
Wei Liu, Jin Meng, Liang Zhou
doaj +1 more source
Development in ambient backscatter communications
IET Microwaves, Antennas &Propagation, Volume 17, Issue 13, Page 963-973, October 2023., 2023 In this paper, we conduct an up‐to‐date review of one branch of BackCom systems, namely Ambient BackCom, which utilises the already available ambient signals, instead of a dedicated radio frequency (RF) carrier in most of the BackCom works, to establish BackCom links.
Shujuan Chang, Yuan Ding
wiley +1 more source
The EUV Reflectance of Mercury's Surface Measured by BepiColombo/PHEBUS
Journal of Geophysical Research: Planets, Volume 128, Issue 3, March 2023., 2023 Abstract On 9 and 10 October 2021, Probing the Hermean Exosphere by Ultraviolet Spectroscopy aboard BepiColombo observed the disk‐integrated reflected light from the Sun by Mercury in the spectral range 90–160 nm at a phase angle of 70°. These observations are used to derive the EUV reflectance of the surface of Mercury in this wavelength range for the
J.‐Y. Chaufray +12 more
wiley +1 more source
Analysis of outboard cross‐eye jamming using an unmanned platform
IET Signal Processing, Volume 17, Issue 2, February 2023., 2023 This study establishes the theoretical mathematical framework to illustrate the positive effects of outboard configuration on the jamming effect and proves the feasibility of using an unmanned platform to implement outboard cross‐eye jamming. Abstract To address the problem and reduce the risk wherein a ship‐based cross‐eye jammer could set a protected
Zhaodong Wu, Shengliang Hu, Yasong Luo
wiley +1 more source
One-Dimensionally Polarization-Independent Retrodirective Metasurface [PDF]
Journal of Electromagnetic Engineering and Science, 2019 A one-dimensionally polarization-independent retrodirective metasurface (PIRMS) is proposed in this letter. The retrodirective metasurface (RMS) consists of ring structures on its ground plane to achieve the polarization-independent characteristics.
Jae-Gon Lee, Jeong-Hae Lee
doaj +1 more source