Results 41 to 50 of about 716,699 (142)

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

The Implementation of Wide Angle and UWB Retrodirective Performance Based on Non-Uniformly Spaced Van Atta Array

IEEE Access
This paper presents the design, simulation, fabrication, and measurement of a broadband $1\times 16$ Non-Uniform Van Atta Array (NUVAA) retrodirective antenna array based on compact Vivaldi elements.
Mahdi Rahanandeh Lafmejani, Bijan Zakeri, Amir Saman Nooramin   +2 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

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

Performance Aspects of Retrodirective RFID Tags

Engineering Proceedings
Although RFID(radio frequency identification) tags do not require a direct line of sight, their operational range is often characterized as being limited.
Theodoros N. F. Kaifas
doaj   +1 more source

Theoretical and Experimental Investigation of N-Bit Reconfigurable Retrodirective Metasurface [PDF]

Journal of Electromagnetic Engineering and Science
The PIN diode-based N-bit reconfigurable retrodirective metasurface (N-bit RRDM) is a next-generation retro-reflector that offers the advantages of effective electronical control of the retro-reflection angle, low loss, and thin planar structure. However,
Hae-Bin Jung, Jeong-Hae Lee
doaj   +1 more source

Planar Beam Steerable Parasitic Array Antenna System Design Based on the Yagi‐Uda Design Method

International Journal of Antennas and Propagation, Volume 2019, Issue 1, 2019., 2019
A planar beam steerable array antenna system is proposed with dual‐control circuits for feeding and reactive loadings. Two orthogonally arranged planar dipoles are excited by SPDT switching circuits, while the forward and backward beam directions are controlled by the adjusted effective electric lengths of the parasitic dipole elements.
Seok-Jae Lee, Won-Sang Yoon, Sang-Min Han, Hervé Aubert   +3 more
wiley   +1 more source

Vertical Polarized Helicoid Array With Full Azimuth Beam-Scanning

IEEE Open Journal of Antennas and Propagation
This paper outlines the theory behind helicoid antenna array beamforming and the practical validation on an $8\times 8$ helicoid antenna array. Design, simulation, and measurement are presented at 2.45 GHz.
Yat Hin Chan, Hossein Mardani, Neil Buchanan, Vincent Fusco   +3 more
doaj   +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

Secure Wireless Key Establishment Using Retrodirective Array [PDF]

2016 IEEE Globecom Workshops (GC Wkshps), 2016
In this paper a new method of establishing secret keys for wireless communications is proposed. A retrodirective array (RDA) that is configured to receive and re-transmit at different frequencies is utilized as a relay node. Specifically the analogue RDA is able to respond in 'real-time', reducing the required number of time slots for key establishment
Yuan Ding 0001, Junqing Zhang, Vincent F. Fusco   +2 more
openaire   +4 more sources