High‐efficiency microstrip rectenna for microwave power transmission at Ka band with low cost

2016 ◽  
Vol 10 (15) ◽  
pp. 1648-1655 ◽  
Author(s):  
Huan Mei ◽  
Xuexia Yang ◽  
Bing Han ◽  
Guannan Tan
Keyword(s):  
Microwave Power ◽  
High Efficiency ◽  
Power Transmission ◽  
Low Cost ◽  
Ka Band

scholarly journals Microwave building as an application of wireless power transfer

2014 ◽  
Vol 1 (1) ◽  
pp. 1-9 ◽  
Author(s):  
Naoki Shinohara ◽  
Naoki Niwa ◽  
Kenji Takagi ◽  
Kenniti Hamamoto ◽  
Satoshi Ujigawa ◽  
...  
Keyword(s):  
High Power ◽  
Microwave Power ◽  
Power Distribution ◽  
Distribution System ◽  
Power Transmission ◽  
Low Cost ◽  
Total Efficiency ◽  
Wireless Power ◽  
Power Distribution System ◽  
Deck Plate

We propose a wireless power distribution system (WPDS) operating at 2.45 GHz CW in buildings instead of wired power distribution in order to reduce the initial cost of the building. Required technologies for the WPDS are (a) low-cost and low-loss deck plate waveguide, (b) variable microwave power distributor for the waveguide, and (c) high-power (>100 W) rectifier at the outlet. We developed and tested the deck plate waveguide, power distributor, and high-power rectenna consisting of 256 Si Schottky barrier diodes and newly developed GaN diodes. Finally, a test WPDS was built and microwave power transmission experiments were conducted. The total efficiency of the test WPDS was estimated to be 52%.

scholarly journals Magnetically coupled resonant wireless power transmission system that meets the Rezence efficiency and frequency specification

2021 ◽  
Author(s):  
Jean-Claude Leslie Clarke
Keyword(s):  
Design Methodology ◽  
High Efficiency ◽  
Power Transmission ◽  
Low Cost ◽  
Separation Distance ◽  
Design Flow ◽  
Original Design ◽  
Spiral Coil ◽  
Capacitive Tuning ◽  
Class E

High efficiency Class-E Power Amplifiers (PA) are difficult to analytically design using the original design equations. We present a high frequency (HF) Class-E PA design methodology that simplifies design in this thesis. A high-efficiency Class-E PA was designed using a low-cost power FET by following this design-flow. Due to their small size, it’s difficult to design efficient MCR-WPT resonators for portable electronics. We propose a novel multi-layer MCR-WPT Printed Spiral Coil (PSC) design and design methodology. Two MCR-WPT PSC resonators were designed for smartphones and tablets to meet the Rezence Self-Resonant Frequency and efficiency specifications using this novel design and design methodology. The MCR-WPT resonators power transfer efficiency is reduced when their separation distance is below the optimal Critical Coupling Distance (CCD) due to frequency splitting. We present a novel maximum-peak detection and auto-tuning circuit that automatically improves efficiency using capacitive tuning when the separation distance is below the CCD.

scholarly journals Design and Analysis of a 35 GHz Rectenna System for Wireless Power Transfer to an Unmanned Air Vehicle

Energies ◽  
2022 ◽  
Vol 15 (1) ◽  
pp. 320
Author(s):  
Muttahid Ull Hoque ◽  
Deepak Kumar ◽  
Yves Audet ◽  
Yvon Savaria
Keyword(s):  
Antenna Array ◽  
Microwave Power ◽  
Patch Antenna ◽  
High Efficiency ◽  
Low Cost ◽  
High Gain ◽  
Input Power ◽  
Design System ◽  
Power Transfer ◽  
Critical System

In this article, the concept of a 22-kW microwave-powered unmanned aerial vehicle is presented, where the critical system architecture is analyzed and modeled for wirelessly transferring microwave power to the flying UAVs. The microwave system transmitting power at a 35 GHz frequency was found to be suitable for low-cost and compact architectures. The size of the transmitting and receiving systems are optimized to 108 m2 and 90 m2, respectively. A linearly polarized 4 × 2 rectangular microstrip patch antenna array has been designed and simulated to obtain a high gain, high directivity, and high efficiency in order to satisfy the power transfer requirement. The numerically simulated gain, directivity, and efficiency of the proposed patch antenna array are 13.4 dBi, 14 dBi, and 85%, respectively. Finally, a rectifying system (rectenna) is optimized using the Agilent advanced design system (ADS) software as a microwave power receiving system. The proposed rectenna has an efficiency profile of more than 80% for an RF input power range of 9 to 18 dBm. Moreover, the RF-to-DC conversion efficiency and DC output voltage of the proposed rectenna is 80% and 3.5 V, respectively, for a 10 dBm input power at 35 GHz with a load of 1500 Ω.

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