The investigation on size reduction feasibility of planar witricity device for biomedical implantable application

This article presents the investigation on size reduction feasibility of planar Witricity device for biomedical implantable application. Biomedical implantable application demands for very small size device. Thus, the planar type of Witricity device is designed and investigated with the aim of size reduction. There are two designs presented in this article. Design A has larger size with an area dimension of 120 × 120 mm2 and capable for energy transferable distance of 50 mm. Meanwhile, another Witricity device, namely Design B has smaller size of 80 × 80 mm2 area is specified for approximately 40 mm transfer distance. The feasibility investigation on size reduction is observed from three main parameters; current distribution, coupling efficiency and return loss. The size reduction of 55% by Design B may lead to the reduction of 20% transfer distance but still with acceptable of 58% coupling efficiency at 40 mm that beneficial for biomedical applications

Investigation of unequal planar wireless electricity device for efficient wireless power transfer

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

An overview on Islamic principles of religious diversity at workplaces in Malaysia.

The liberty of workers to exercise their religion and beliefs is one of the rights of workers at their workplace. Nonetheless, there is not much discussion on this issue, particularly in situations where there are close interactions between Muslims and non-Muslims at the workplace. This research examines the principles and attitudes as shown by the Prophet (PBUH) in interacting with non-Muslims. This discussion is necessary so that any constraints to practice one’s religion such as limitations as to the facilities and opportunities to perform the rites can be removed. This chapter is based on a research that takes a doctrinal approach where the issue will be examined from the perspective of the Qur’an and the Sunnah as the primary sources of Islamic law. The research output includes increasing references and guidelines regarding Islamic principles on religious diversity, in terms of dealing with the non-Muslims so that everyone will have the opportunity to practice their religious duties at work

The investigation of substrate's dielectric properties for improving the performance of witricity devices

In designing a better Witricy device, there are several parameters that contribute to the improvement of efficiency. In this article, the substrate characteristics, which gaining less attention despite their potential for the improvement of Witricity performance are thoroughly studied. The characteristics such permittivity and loss tangent that very common in microwave design are investigated. The investigation has proven that RO 3010 substrate composed of ceramic-filled Polytetrafluoroethylene (PTFE) composites is the best material for the optimal Witricity performance, independent of the spiral coil's number of turns. This is due to its high-energy storage capacity obtained from the real permittivity, and roughly low loss factor and tangent loss. Hence, the Rogers RO 3010 substrate is proposed in this study as it performs reliable 50% to 74% coupling efficiency with the varied number of spiral coil turns

An overview on islamic principles of religious diversity at workplaces in Malaysia

The liberty of workers to exercise their religion and beliefs is one of the rights of workers at their workplace. Nonetheless, there is not much discussion on this issue, particularly in situations where there are close interactions between Muslims and non-Muslims at the workplace. This research examines the principles and attitudes as shown by the Prophet (PBUH) in interacting with non-Muslims. This discussion is necessary so that any constraints to practice one’s religion such as limitations as to the facilities and opportunities to perform the rites can be removed. This chapter is based on a research that takes a doctrinal approach where the issue will be examined from the perspective of the Qur’an and the Sunnah as the primary sources of Islamic law. The research output includes increasing references and guidelines regarding Islamic principles on religious diversity, in terms of dealing with the non-Muslims so that everyone will have the opportunity to practice their religious duties at work