Investigation of Unequal Planar Wireless Electricity Device for Efficient Wireless Power Transfer

Abstract

This article focuses on the design and investigation of a pair of unequally sized wireless electricity (Witricity) devices that are equipped with integrated planar coil strips. The proposed pair of devices consists of two different square-shaped resonator sizes of 120 mm × 120 mm and 80 mm × 80 mm, acting as a transmitter and receiver, respectively. The devices are designed, simulated and optimized using the CST Microwave Studio software prior to being fabricated and verified using a vector network analyzer (VNA). The surface current results of the coupled devices indicate a good current density at 10 mm to 30 mm distance range. This good current density demonstrates that the coupled devices' surface has more electric current per unit area, which leads to a good performance up to 30 mm range. Hence, the results also reveal good coupling efficiency between the coupled devices, which is approximately 54.5 % at up to a 30 mm distance, with both devices axially aligned. In addition, a coupling efficiency of 50 % is achieved when a maximum lateral misalignment (LM) of 10 mm, and a varied angular misalignment (AM) from 0° to 40° are implemented to the proposed device.

A New Design for Compact Size Wireless Power Transfer Applications Using Spiral Defected Ground Structures

“…3 show that the proposed design has a good efficiency and a compact size compared to other designs. The comparisons between the suggested work and the other work such as in [9], [2], and [10] confirm that the suggested system is more compact and achieves higher FoM than the mentioned structures. Although the structure of semi-H shaped in [2] has high FoM but it has a large size and a low efficiency compared to the suggested work.…”

“…However, the total system size is 25 × 25 mm 2 . The author in [9] introduces a new design for WPT that depends on asymmetric design for the transmitter and the receiver. Furthermore, the transmitter size is 120 × 120 mm 2 and the receiver size is 80 × 80 mm 2 while the system operates at an efficiency of 54.5% and a transmission distance of 30 mm.…”

5G planar branch line coupler design based on the analysis of dielectric constant, loss tangent and quality factor at high frequency

“…where parameters G and B can be defined by (15) and (16), respectively, by using (13) and 14: Thereafter, by assuming R L = Z 0 and by using t = tan βL 1 = tan 2π L 1 , the distance of stub impedance from BLC, L 1 can be determined using (19):…”

“…However, miniaturization is not a concern in the design at high frequency. The components 7 , 14 , 15 designed on FR-4 substrate due to its low cost, with FR-4 having a high loss tangent. Since FR-4 displays a high loss tangent, it may degrade the Q-factor of the design, which leads to the degradation of performance compared to the performance of the designs with RO4003C 6 and RT5870 16 .…”

Compact 500 MHz Coupled Resonators Design Analyzed by J-Inverters for Wireless Power Transfer (WPT) Utilization

“…Though, the prototype size is 2.5 cm × 2.5 cm to permits the transmission of the power wirelessly. In [27], the authors present a novel structure for wireless electricity that depends on the symmetric model. The size is 120 mm × 120 mm for TX, and the size is 80 mm × 80 mm for RX while the system works at a transmission distance of 30 mm and coupling efficiency of 54.5 %.…”