scholarly journals Subwavelength antenna array based on far-field time reversal

2013 ◽  
Vol 62 (5) ◽  
pp. 058401
Author(s):  
Liang Mu-Sheng ◽  
Wang Bing-Zhong ◽  
Zhang Zhi-Min ◽  
Ding Shuai ◽  
Zang Rui
Keyword(s):  
Antenna Array ◽  
Time Reversal ◽  
Far Field

Subwavelength Focussing in Metamaterials Using Far Field Time Reversal

2013 ◽  
pp. 141-168 ◽  
Author(s):  
Mathias Fink ◽  
Fabrice Lemoult ◽  
Julien de Rosny ◽  
Arnaud Tourin ◽  
Geoffroy Lerosey
Keyword(s):  
Time Reversal ◽  
Far Field

Active Antenna Array Diagnosis from Far-Field Measurements

2018 ◽  
Author(s):  
Oluwole John Famoriji ◽  
Zhongxiang Zhang ◽  
Akinwale Fadamiro ◽  
Zakir Khan ◽  
Fujiang Lin
Keyword(s):  
Antenna Array ◽  
Field Measurements ◽  
Far Field ◽  
Active Antenna

Targets Detection Based on Time Reversal Operator with Uniform Circular Array

2014 ◽  
Vol 602-605 ◽  
pp. 1855-1858
Author(s):  
Wei Liu ◽  
Yong Qing Fu ◽  
Da Xu
Keyword(s):  
Antenna Array ◽  
Time Reversal ◽  
Operator Method ◽  
Circular Array ◽  
Electromagnetic Environment ◽  
The Given

In order to detect targets accurately in electromagnetic environment, a decomposition of time reversal operator method for detecting targets with uniform circular array (UCA) is proposed in this paper. In this method, the time reversal operator in UCA is obtained by the transmission functions of targets and antenna array. And then, the eigenvector decomposition of time reversal operator is performed. According to the eigenvectors and the transmission functions of targets and scanning points in the given targets area, the focusing values of all scanning points are calculated, and the direction of scanning points whose focusing values are far greater than others are the direction of targets. Finally, the simulations verify the effectiveness of the proposed method.

scholarly journals Far Field Modeling of Electromagnetic Time Reversal and Application to Selective Focusing on Small Scatterers

2008 ◽  
Vol 69 (3) ◽  
pp. 830-844 ◽  
Author(s):  
X. Antoine ◽  
B. Pinçon ◽  
K. Ramdani ◽  
B. Thierry
Keyword(s):  
Time Reversal ◽  
Far Field ◽  
Field Modeling ◽  
Small Scatterers

scholarly journals A performance predictor of beamforming versus time-reversal based far-field wireless power transfer from linear array

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Hong Soo Park ◽  
Sun K. Hong
Keyword(s):  
Time Reversal ◽  
Power Transmission ◽  
Linear Array ◽  
Wireless Power Transfer ◽  
Far Field ◽  
Power Transfer ◽  
Wireless Power ◽  
Dynamic Propagation ◽  
Received Power ◽  
Indoor Scenarios

AbstractFor far-field wireless power transfer (WPT) in a complex propagation environment, a time-reversal (TR) based WPT that can overcome the drawbacks of conventional beamforming (BF) by taking advantage of multipath has been recently proposed. However, due to the WPT performance of BF and TR depending on the complexity of the propagation environment, the performance prediction between BF versus TR would be required. We present a detailed and generalized analysis of the recently proposed performance metric referred to as the peak received power ratio (PRPR) for linear array-based WPT. Here, the effectiveness of PRPR is verified via measurement for free space and indoor scenarios. The results demonstrate that PRPR is directly related to the complexity of the propagation environment and the corresponding power transmission capability of BF and TR. That is, the higher the complexity, the greater the value of PRPR and TR outperforms BF with higher peak power given the same average transmit power and vice versa. The mode decision between BF and TR based on PRPR potentially promises efficient far-field WPT even in a dynamic propagation environment.

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