Results 141 to 150 of about 1,327,684 (330)

Neural Network–Assisted Metasurface Retroreflector With Wide‐Angle Adaptivity

Electron, EarlyView.
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

Single receiver Long‐Term Evolution passive radar system using signal reconstruction for moving target detection

IET Radar, Sonar & Navigation
This paper presents a single‐antenna receiver passive radar system in the context of moving target detection such as trains, car, planes and UAVs, leveraging the long‐term evolution (LTE) network as an illumination source. The proposed system uses signal
Lionel deGuenin, Patrick Rosson, Nicolas Petrochilos, Eric Moreau   +3 more
doaj   +1 more source

Dynamic Multifunctional Metasurfaces Based on Passive Cascade Structure

Electron, EarlyView.
A dynamic multifunctional metasurface is proposed in this paper. Unlike mainstream multifunctional metasurface based on programmable metasurfaces, it consists of two passive metasurfaces, presenting a significant cost advantage. By controlling the displacement, different functions such as beam steering, focusing, and OAM wave generation can be realized
Xiangming Wu, Yifeng Wang, Haoyang Shi, Jie Tian, Xiong Wang, Weiren Zhu   +5 more
wiley   +1 more source

The Fundamentals of Radar with Applications to Autonomous Vehicles [PDF]

, 2019
Radar systems can be extremely useful for applications in autonomous vehicles. This paper seeks to show how radar systems function and how they can apply to improve autonomous vehicles.
Rummel, Kameron
core   +1 more source

Quasi‐digital memristor with self‐rectifying and synaptic functions in crossbar array architectures

FlexMat, EarlyView.
The text should be different from the abstract text. A self‐rectifying quasi‐digital memristor (QDM) featuring a well‐defined p‐AgI/n‐PbI2 heterojunction is developed. It monolithically integrate diode‐like rectification, digital switching, and analog plasticity.
Tianyu Liu, Qingqing Wang, Qiuyu Liu, Jinze Li, Zhongjing Xia, Hongcheng Yang, Zilong Mao, Siyu Gou, Zhe Li, Chao Zhu, Xuefen Song, Lin Wang   +11 more
wiley   +1 more source

Frequency sharing between passive sensors and aeronautical radionavigation systems employing ground transponders in the band 4.2 - 4.4 GHz [PDF]

The 4.2 to 4.4 GHz band is reserved for radio altimeters aboard aircraft and for associated transponders on the ground. A radar altimeter system which utilizes associated ground transponders is described and the feasibility of co-channel operation of ...
Degroot, N. F.
core   +1 more source

Review of millimeter‐wave and terahertz near‐field synthetic aperture radar imaging technology

InfoScience, EarlyView.
Abstract This paper comprehensively reviews the development of millimeter‐wave (MMW) and terahertz (THz) near‐field imaging technologies, with an emphasis on the state of synthetic aperture radar (SAR)‐based imaging technologies. Near‐field imaging technologies are categorized into passive and active imaging modes, among which active imaging is favored
Qi Yang, Hongqiang Wang, Xu Chen, Xin Peng   +3 more
wiley   +1 more source

A fast disturbance cancellation scheme for orthogonal frequency division multiplexing‐based passive radar exploiting reciprocal filter

IET Radar, Sonar & Navigation
This paper proposes a simple non‐adaptive approach for the suppression of direct signal and clutter contributions in a passive radar system based on orthogonal frequency division multiplexing transmissions, exploiting the properties of a reciprocal ...
Javier Trujillo Rodriguez, Giovanni P. Blasone, Fabiola Colone, Pierfrancesco Lombardo   +3 more
doaj   +1 more source

LIDAR studies on microbursts [PDF]

Preliminary analysis of requirements for future airborne windshear detection systems is presented. The following topics are covered: flight mechanics; microbursts modeling; microburst detection with airborne systems (LIDAR, radar, passive IR sensors ...
Aurenche, Y., Boulay, J. L.
core   +1 more source

Phase separation enables dual ionic and thermal transport in solid‐state cathodes

InfoMat, EarlyView.
We design a phase‐separated ionogel composite cathode (PS cathode) with a bicontinuous network formed through ionic liquid‐polymer phase separation. Simulations and experiments show that this architecture couples efficient ionic conduction with enhanced thermal transport, thereby suppressing polarization and hotspot formation.
Guangzeng Cheng, Yonghui Wang, Ziwei Lu, Jing Shi, Jingwei Chen, Weiqian Tian, Yue Zhu, Danqi He, Jingyi Wu, Huanlei Wang   +9 more
wiley   +1 more source