scholarly journals A Comparative Study on Current- and Voltage-Optimized Circuit Scheme for Multiple-Transmitter and Single-Receiver WPT System

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Jin Zhang ◽  
Weiao Xu ◽  
Dong Chen ◽  
Chen Zhang
Keyword(s):  
Comparative Study ◽  
Power Transmission ◽  
Input Power ◽  
Structural System ◽  
Wireless Power ◽  
Full Wave ◽  
Source Voltage ◽  
Constant Source ◽  
Single Receiver ◽  
A Current

As an important structural system for effectively improving power delivered to the load (PDL) and power transmission range, multiple-transmitter (TX) and single-receiver (RX) wireless power transfer (WPT) system is gaining more and more attention in both academic circles and the industrial fields. Based on the Lagrange multiplier method, this paper first provides a current- and voltage-optimized circuit scheme to maximize the PDL of the multiple-TX WPT system. Then, for a determined WPT system, the current-optimized circuit scheme is proposed to maximize the PDL effectively with constant source voltages and feeding currents for TXs. While voltage-optimized circuit scheme can effectively adjust the source voltages and feeding currents and maintain the same level of input power and PDL as a current-optimized solution. Through comparative study, the voltage-optimized solution shows its advantages in adjustable source voltage and feeding current without any degradation of PDL. Finally, the theoretical analysis results are confirmed by the results of full-wave electromagnetic simulation.

Design and Analysis of a Single-Band Printed Rectenna Circuit at WiFi Frequency for Microwave Power Transmission

2019 ◽  
Vol 15 (2) ◽  
pp. 33-39
Author(s):  
Ahmad Salih ◽  
Abdulkareem Abdullah
Keyword(s):  
Power Transmission ◽  
Impedance Matching ◽  
Input Power ◽  
Single Band ◽  
Wireless Power ◽  
Question Mark ◽  
Software Packages ◽  
Maximum Conversion ◽  
Maximum Conversion Efficiency ◽  
Simulation Results

In this paper, a single-band printed rectenna of size (45×36) mm2 has been designed and analyzed to work at WiFi frequency of 2.4 GHz for wireless power transmission. The antenna part of this rectenna has the shape of question mark patch along with an inverted L-shape resonator and printed on FR4 substrate. The rectifier part of this rectenna is also printed on FR4 substrate and consisted of impedance matching network, AC-to-DC conversion circuit and a DC filter. The design and simulation results of this rectenna have been done with the help of CST 2018 and ADS 2017 software packages. The maximum conversion efficiency obtained by this rectenna is found as 57.141% at an input power of 2 dBm and a load of 900 Ω.

scholarly journals Smart Wireless Power Transfer Operated by Time-Modulated Arrays via a Two-Step Procedure

2015 ◽  
Vol 2015 ◽  
pp. 1-11 ◽  
Author(s):  
Diego Masotti ◽  
Alessandra Costanzo ◽  
Vittorio Rizzoli
Keyword(s):  
Computer Aided Design ◽  
Power Transmission ◽  
Transfer Performance ◽  
Wireless Power ◽  
Harmonic Radiation ◽  
Full Wave ◽  
Array Architecture ◽  
Step Procedure ◽  
Novel Method ◽  
Aided Design

The paper introduces a novel method for agile and precise wireless power transmission operated by a time-modulated array. The unique, almost real-time reconfiguration capability of these arrays is fully exploited by a two-step procedure: first, a two-element time-modulated subarray is used for localization of tagged sensors to be energized; the entire 16-element TMA then provides the power to the detected tags, by exploiting the fundamental and first-sideband harmonic radiation. An investigation on the best array architecture is carried out, showing the importance of the adopted nonlinear/full-wave computer-aided-design platform. Very promising simulated energy transfer performance of the entire nonlinear radiating system is demonstrated.

scholarly journals Feasibility study of microwave wireless powered flight for micro air vehicles

2017 ◽  
Vol 4 (2) ◽  
pp. 146-159 ◽  
Author(s):  
Kohei Shimamura ◽  
Hironori Sawahara ◽  
Akinori Oda ◽  
Shunsuke Minakawa ◽  
Sei Mizojiri ◽  
...  
Keyword(s):  
Power Transmission ◽  
Axial Ratio ◽  
Micro Air Vehicles ◽  
Transmission Efficiency ◽  
Input Power ◽  
Bend Angle ◽  
Back Side ◽  
Wireless Power ◽  
Wireless Power Transmission ◽  
Air Vehicles

New small unmanned air vehicles designated as micro air vehicles (MAVs) are increasingly attractive for research, environmental observation, and commercial purposes. As described herein, the feasibility of a system for wireless power transmission via microwaves for MAVs was investigated. For its light weight and flexibility, a textile-based rectenna was proposed for microwave wireless power transmission of MAVs. To investigate bending effects on radiation performance, a microstrip patch antenna with a 5.8 GHz left-hand circular polarization was developed on a textile substrate. The antenna return loss, 20 dB, increased slightly with the antenna bending angle. An axial ratio <3 dB was maintained when the antenna bend angle was <30°. A rectification circuit was formed on the back side felt with sandwiched copper foil as a ground plate. Its weight per unit area was 0.08 g/m2, with maximum rectification efficiency of 58% with 100 Ω load at 63 mW input power. The average and maximum total transmission efficiency using the 5.8 GHz multiple rectenna with a 2.45 GHz retrodirective system were, respectively, 0.44 and 0.60%. The possibility and feasibility of microwave power transmission system using the textile-based rectenna were evaluated.

scholarly journals Design of a Small Array Antenna with an Extended Cavity Structure for Wireless Power Transmission

2020 ◽  
Vol 20 (1) ◽  
pp. 9-15
Author(s):  
Jun Hur ◽  
Hosung Choo
Keyword(s):  
Power Transmission ◽  
Transmission Efficiency ◽  
Input Power ◽  
Array Antenna ◽  
Antenna Element ◽  
Wireless Power ◽  
Wireless Power Transmission ◽  
Cavity Structure ◽  
Extended Cavity ◽  
Small Array

This paper proposes a design of a small array antenna with an extended cavity structure for wireless power transmission. The proposed array element consists of a square radiating loop, which is designed to resonate at 5.8 GHz, and an extended cavity structure to reduce the mutual coupling between adjacent elements. We derive the optimal element number in a limited space by considering the input power for each element, fabrication cost, and aperture efficiency of the system. To verify the suitability of the proposed a small array with an extended cavity structure, a 2 × 2 downscaled array antenna is fabricated and measured in a full anechoic chamber. The results confirm that the proposed antenna element with an extended cavity structure is suitable for wireless power transmission systems; the proposed array has a transmission efficiency of about 1% at a distance of 2 m when the array is applied to both transmitting and receiving antennas.

Advance and Innovation in Wireless Power Transmission Technology for Autonomous Systems

2017 ◽  
pp. 316-361 ◽  
Author(s):  
Mohamed Adel Sennouni ◽  
Benaissa Abboud ◽  
Abdelwahed Tribak ◽  
Hamid Bennis ◽  
Mohamed Latrach
Keyword(s):  
Antenna Arrays ◽  
Power Transmission ◽  
Autonomous Systems ◽  
Input Power ◽  
Wireless Power ◽  
Wireless Power Transmission ◽  
Microwave Frequencies ◽  
Phased Antenna Arrays ◽  
Potential Applications ◽  
Technological Developments

This chapter focuses on the concept of transmitting power without using wires that is also known as Wireless Power Transmission (WPT). This chapter attempts to present the most important and relevant works in this field of research in order to develop a topical ‘overview', present the current results, and also share some contributions and ‘vision' for the future. The technological developments in Wireless Power Transmission is also presented and discussed. The advantages, disadvantages, biological impacts and the most potential applications of WPT are also presented. This chapter presents also new and efficient designs of a rectifying antenna (rectenna) involved to be used at low and high input power levels constraints at microwave frequencies of ISM band in particular at 2.45 GHz and 5.8 GHz. The rectennas have been developed were based on microstrip technology incorporating a new class of phased antenna arrays with circular polarization associated with a new RF-to-DC rectifiers.

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