Abstract
The electromagnetic wave time reversal technology using time reversal cavity (TRC) has potential applications in many areas, such as pulse compression, power synthesis, perturbation detection, beamforming, etc. Microwave chaotic cavity with multi-path transmission characteristics is usually used in TRC. Based on diffraction theory, it can prove that this kind of cavity has spatiotemporal focusing characteristics and can be used for compressing pulses, but it cannot be used to analyze the reversal performance of the cavity. In order to obtain a suitable analysis method and guide the design of TRC, in this work, the scattering, diffusion and attenuation characteristics of electromagnetic wave propagation are analyzed and a multipath channel model of TRC is built by the channel theory. Moreover, the crosstalk characteristics between paths are studied, and the generation mechanism of time sidelobe, time sidelobe shift and interference are also investigated. In addition, under the assumption of random plane wave, the distribution characteristics of spatial focal spot are analyzed, which is consistent with the diffraction theory. Moreover, the actual focal spot size is not only limited by the diffraction limit, but also related to the initial focal spot size. The theoretical analysis results are basically consistent with the experimental and numerical simulation results.
Highlights
Microwave chaotic cavity with multi-path transmission characteristics is usually used in time reversal cavity (TRC)
it can prove that this kind of cavity has spatiotemporal focusing characteristics
a multipath channel model of TRC is built by the channel theory
Summary
无线多径信道中基于时间反演的物理层安全传输机制 Secure transmission mechanism based on time reversal over wireless multipath channels 物理学报. 基于经验知识遗传算法优化的神经网络模型实现时间反演信道预测 Prediction of time reversal channel with neural network optimized by empirical knowledge based genetic algorithm 物理学报. 基于时间反演技术的电磁器件端口场与内部场转换方法 Conversion method between port field and internal field of electromagnetic device based on time-reversal technique 物理学报. 对 于 TRC, 一些研究人员利用衍射理论和格林函数 证明了时间反演的时空聚焦特性 [3,4].
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
