Full-wave computer-aided optimization of wireless power transfer systems

2014 ◽  
Author(s):  
Marco Dionigi ◽  
Slawomir Koziel ◽  
Mauro Mongiardo
Keyword(s):  
Wireless Power Transfer ◽  
Power Transfer ◽  
Wireless Power ◽  
Full Wave ◽  
Computer Aided

scholarly journals Antenna array design on flexible substrate for wireless power transfer

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Habeeba Khan ◽  
Sayyed Arif Ali ◽  
Mohd Wajid ◽  
Muhammad Shah Alam
Keyword(s):  
Antenna Array ◽  
Flexible Substrate ◽  
Wireless Power Transfer ◽  
Beam Width ◽  
Power Transfer ◽  
Wireless Power ◽  
Content Type ◽  
Polyimide Substrate ◽  
Full Wave ◽  
Polarization Level

PurposeIn this work, a microstrip antenna array for wireless power transfer (WPT) application is reported. The proposed 4 × 4 antenna array operating at 16 GHz is designed using a flexible Kapton polyimide substrate for a far-field charging unit (FFCU).Design/methodology/approachThe proposed antenna is designed using the transmission line model on a flexible Kapton polyimide substrate. The finite element method (FEM) is used to perform the full-wave electromagnetic analysis of the proposed design.FindingsThe antenna offers −10 dB bandwidth of 240 MHz with beam width and broadside gain found to be 29.4° and 16.38 dB, respectively. Also, a very low cross-polarization level of −34.23 dB is achieved with a radiation efficiency of 36.67%. The array is capable of scanning −15° to +15° in both the elevation and azimuth planes.Originality/valueThe radiation characteristics achieved suggest that the flexible substrate antenna is suitable for wireless charging purposes.

scholarly journals Effects of Metamaterial Slabs Applied to Wireless Power Transfer at 13.56 MHz

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Gunyoung Kim ◽  
Taek-Kyu Oh ◽  
Bomson Lee
Keyword(s):  
Wireless Power Transfer ◽  
Ring Resonators ◽  
Negative Permeability ◽  
Power Transfer ◽  
Efficiency Enhancement ◽  
Wireless Power ◽  
Slab Width ◽  
Full Wave ◽  
Space Case ◽  
The Magnetic Field

This paper analyzes the effects of a metamaterial slab (or a practical “perfect lens”) with negative permeability applied to a two loop magnetically coupled wireless power transfer (WPT) system at 13.56 MHz, based on theory, full-wave electromagnetic- (EM-) simulations, and measurements. When using lossless slabs with ideal negative permeability in EM-simulations, the WPT efficiencies have been found to be enhanced close to 100% due to the magnetic field focusing. For the case of using a realistic slab made of ring resonators (RR)μr=-1-j0.23withs/d=0.5(s: slab width,d: distance between the transmitting and receiving loops), the WPT efficiency has been found to significantly decrease to about 20%, even lower than that of a free space case (32%) due to the heavy power absorption in the slab. However, some efficiency enhancement can be achieved whens/dis optimized between 0.1 and 0.3. Overall, the significant enhancement of efficiencies when using a lossless slab becomes moderate or only marginal when employing a realistic slab.

scholarly journals Multiple Input Multiple Output Resonant Inductive WPT Link: Optimal Terminations for Efficiency Maximization

Energies ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 2194
Author(s):  
Giuseppina Monti ◽  
Mauro Mongiardo ◽  
Ben Minnaert ◽  
Alessandra Costanzo ◽  
Luciano Tarricone
Keyword(s):  
Eigenvalue Problem ◽  
Multiple Input Multiple Output ◽  
Wireless Power Transfer ◽  
General Purpose ◽  
Electrical Network ◽  
Power Transfer ◽  
Wireless Power ◽  
Full Wave ◽  
Multiple Input ◽  
Input Multiple Output

In this paper a general-purpose procedure for optimizing a resonant inductive wireless power transfer link adopting a multiple-input-multiple-output (MIMO) configuration is presented. The wireless link is described in a general–purpose way as a multi-port electrical network that can be the result of either analytical calculations, full–wave simulations, or measurements. An eigenvalue problem is then derived to determine the link optimal impedance terminations for efficiency maximization. A step-by-step procedure is proposed to solve the eigenvalue problem using a computer algebra system, it provides the configuration of the link, optimal sources, and loads for maximizing the efficiency. The main advantage of the proposed approach is that it is general: it is valid for any strictly–passive multi–port network and is therefore applicable to any wireless power transfer (WPT) link. To validate the presented theory, an example of application is illustrated for a link using three transmitters and two receivers whose impedance matrix was derived from full-wave simulations.

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