Results 51 to 60 of about 777 (161)

Millimeter-Wave Retrodirective Wireless Power Transfer Applicable to Small Electronic Devices

IEEE Journal of Microwaves
With the recent surge in popularity of the Internet of Things (IoT), there also has been a notable increase in research on wirelessly charging IoT enabled electronic devices. Millimeter-wave retrodirective power beaming has recently emerged as a suitable
Sooyoung Oh, Do Hyeon Kim, Wonwoo Lee, Junhyuk Yang, Changkun Park, Hojin Lee, Sun K. Hong   +6 more
doaj   +1 more source

Scatterers in the Rx Near Field for RF Energy Harvesting Efficiency Enhancement

Energies, 2022
In this paper, we investigate the enhancement of RF–RF energy harvesting efficiency (erf–rf) in multipath environments in the context of wireless power transfer (WPT).
Zahra Katbay, Dimitrios Sounas, Mohammed Ismail   +2 more
doaj   +1 more source

An Active Beam‐Reconfigurable Retrodirective Array

Nanophotonics, Volume 15, Issue 13, 13 July 2026.
The proposed beam‐reconfigurable retrodirective array not only enables retroreflection toward the signal source but also achieves flexible beam steering via a tunable reflection plate, offering a viable solution for real‐time multipoint communication and multitarget wireless power transfer.
Wen Yue Wei, Yan Shi, Li Jing Yang, Jun Wei Wu, Qiang Feng, Long Li   +5 more
wiley   +1 more source

Neural Network–Assisted Metasurface Retroreflector With Wide‐Angle Adaptivity

Electron, Volume 4, Issue 2, May 2026.
This work proposes a wide‐angle, multi‐polarization, self‐sensing, and self‐adaptive intelligent metasurface retroreflector, with a planar profile and ultrathin thickness. By integrating a pre‐trained artificial neural network (ANN), the metasurface retroreflector can recognize the incident angle and promptly adapt to changes in the incoming wave.
Jing Ning, Xunfan Wang, Kun Duan, Weixu Yang, Junming Zhao, Tian Jiang, Ke Chen, Yijun Feng   +7 more
wiley   +1 more source

Millimeter-Wave 2D Retrodirective Beamformer Based on Waveguide Rotman Lens

IEEE Access
Millimeter-wave (mmWave) technologies offer high directivity and narrow beamwidth with compact size, making them suitable for wireless power transfer (WPT). To support efficient beam steering, retrodirective operation is advantageous.
Sooyoung Oh, Yeonsoo Kim, Kyungbin Cho, Hojin Lee, Juntaek Oh, Sun K. Hong   +5 more
doaj   +1 more source

Reference‐Value‐Based Non‐Retrodirective Cross‐Eye Jamming Using Monitor Probes for Size‐Constrained Platforms

Electronics Letters, Volume 62, Issue 1, January/December 2026.
This letter proposes a reference‐value‐based non‐retrodirective cross‐eye jamming method using monitor probes for size‐constrained platforms. The proposed approach uses reference values to compensate for mismatch and improve practical implementation in compact jammer systems.
Hong‐Kyun Ryu, Jung‐Hoon Lee
wiley   +1 more source

Bow-tie retrodirective rectenna

Electronics Letters, 2006
A novel bow-tie retrodirective rectenna designed at 5.8 GHz is proposed. The new retrodirective rectenna combines a traditional rectenna with a retrodirective array. The new retrodirective rectenna array can automatically steer its main beam towards the power source and hence is not sensitive to the power incident angle changes.
Y.-J. Ren, K. Chang
openaire   +1 more source

Development of Frequency Modulated Array Antennas for Millimeter‐Wave Communications

Wireless Communications and Mobile Computing, Volume 2019, Issue 1, 2019., 2019
With the massive growth of wireless data in mobile broadband communications, millimeter‐wave (mm‐wave) communication is an alternative enabling technique for fifth generation (5G) wireless communication systems. More importantly, mm‐wave offers large frequency spectrum bands ranging from 30GHz to 300GHz that can be utilized to provide very high ...
Shaddrack Yaw Nusenu, Daniele Pinchera
wiley   +1 more source

Tolerance Analysis and Robustness of Phase Conjugating Cross‐Eye Jamming

IET Radar, Sonar &Navigation, Volume 19, Issue 1, January/December 2025.
This study explores phase‐conjugating (PC) arrays as a robust alternative to Van Atta (VA) arrays for cross‐eye jamming, a radar countermeasure in electronic warfare, developing an analytical framework validated by simulations. It demonstrates PC arrays' superior tolerance to phase errors and lower minimum JSR requirement against skin return.
Vittorio Calligaris, Pierfrancesco Lombardo   +1 more
wiley   +1 more source

Retrodirective optical system [PDF]

, 1969
Fabry-Perot interferometer retrodirective reflector modulator for optical ...
Minott, P. O.
core