Secrecy Rate and Energy Harvesting Trade-off in Cognitive Wireless Energy Transfer Systems

2020 ◽  
Author(s):  
Ping Sun ◽  
Haibo Dai ◽  
Pei Li ◽  
Baoyun Wang
Keyword(s):  
Energy Transfer ◽  
Energy Harvesting ◽  
Wireless Energy Transfer ◽  
Secrecy Rate ◽  
Trade Off

scholarly journals Wireless Energy Transfer

2015 ◽  
pp. 63-91
Author(s):  
Aya Mabrouki ◽  
Mohamed Latrach
Keyword(s):  
Energy Transfer ◽  
Energy Harvesting ◽  
Low Power ◽  
High Efficiency ◽  
Microwave Energy ◽  
Wireless Energy Transfer ◽  
Design Considerations ◽  
High Efficient ◽  
Harvesting Techniques ◽  
Power Rectifier

This chapter proposes an overview of microwave energy harvesting with focuses on the design of high efficiency low power rectifying circuits. A background survey of RF energy harvesting techniques is presented first. Then, the performances of conventional rectifier topologies are analyzed and discussed. A review of the most efficient rectenna designs, from the state of the art, is also presented. Design considerations for low power rectifier operations are detailed and new high efficient rectifying circuits are designed and evaluated in both GSM and ISM bands under low power constraints.

Guest Editorial: Wireless Communications Powered by Energy Harvesting and Wireless Energy Transfer (Part I)

2015 ◽  
Vol 33 (3) ◽  
pp. 357-359 ◽  
Author(s):  
Sennur Ulukus ◽  
Elza Erkip ◽  
Pulkit Grover ◽  
Kaibin Huang ◽  
Osvaldo Simeone ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Wireless Communications ◽  
Energy Harvesting ◽  
Guest Editorial ◽  
Wireless Energy Transfer

scholarly journals Optimal Beamforming for IRS-Assisted SWIPT System with an Energy-Harvesting Eavesdropper

Electronics ◽  
2021 ◽  
Vol 10 (20) ◽  
pp. 2536
Author(s):  
Zhixiang Deng ◽  
Yan Pan
Keyword(s):  
Energy Transfer ◽  
Phase Shift ◽  
Energy Harvesting ◽  
Optimization Problem ◽  
Access Point ◽  
Secrecy Rate ◽  
Convex Optimization Problem ◽  
Alternating Optimization ◽  
Reflecting Surface ◽  
Optimal Beamforming

In this paper, we study a simultaneous wireless information and power transfer (SWIPT) system aided by the intelligent reflecting surface (IRS) technology, where an AP transmits confidential information to the legitimate information receiver (IR) in the presence of an energy harvesting (EH) receiver that could be a potential eavesdropper. We aim to maximize the secrecy rate at the legitimate IR by jointly optimizing the information beamforming vector and the energy transfer beamforming vector at the access point (AP), and the phase shift matrix at the IRS, subject to the minimum harvested power required by the EH receiver. The semi-definite relaxation (SDR) approach and the alternating optimization (AO) method are proposed to convert the original non-convex optimization problem to a series of semi-definite programs (SDPs), which are solved iteratively. Numerical results show that the achievable secrecy rate of the proposed IRS-assisted SWIPT system is higher than that of the SWIPT system without the assistance of the IRS.

scholarly journals MICROWAVE METAMATERIAL-BASED SUPERLENS FOR ENERGY HARVESTING APPLICATIONS

2018 ◽  
Vol 56 (6) ◽  
pp. 698
Author(s):  
Kieu Vu Thang ◽  
Nguyen Thanh Tung ◽  
Ewald Janssens
Keyword(s):  
Energy Transfer ◽  
Energy Harvesting ◽  
Wireless Energy Transfer ◽  
Integration Technique ◽  
Finite Integration Technique ◽  
Electromagnetic Signals ◽  
Sub Wavelength

Superlens imaging has been known as one of the most intriguing applications of metamaterials due to its capability of sub-wavelength imaging. In this report, we numerically demonstrate the possibility to make an amplifying superlens, which can focus and consequently enhance electromagnetic signals emitted at GHz frequencies. Simulations using the finite integration technique are performed to explore the amplifying mechanism of the proposed superlens. It is found that the focused signals can be considerably intensified at a selected position. The results show potential uses of metamaterial superlenses for future wireless energy transfer devices and novel energy harvesting applications.

scholarly journals Development of Wireless Energy Transfer Module for Solar Energy Harvesting

2013 ◽  
Vol 11 ◽  
pp. 882-894 ◽  
Author(s):  
Izzul Fahmi Zambari ◽  
Chiah Yi Hui ◽  
Ramizi Mohamed
Keyword(s):  
Energy Transfer ◽  
Energy Harvesting ◽  
Solar Energy ◽  
Wireless Energy Transfer ◽  
Solar Energy Harvesting

Guest Editorial: Wireless Communications Powered by Energy Harvesting and Wireless Energy Transfer, Part II

2015 ◽  
Vol 33 (8) ◽  
pp. 1477-1479 ◽  
Author(s):  
Sennur Ulukus ◽  
Elza Erkip ◽  
Pulkit Grover ◽  
Kaibin Huang ◽  
Osvaldo Simeone ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Wireless Communications ◽  
Energy Harvesting ◽  
Guest Editorial ◽  
Wireless Energy Transfer
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