Wireless power transfer (WPT) technology becoming a reality has meant electrical power can be transferred over a range without physical contact. In recent times, the amount of energy required for many computing tasks is continuously decreasing, leading to low-power devices such as IoT devices, which in turn justifies the demand for wireless power transmission for uninterrupted operation. Thus, WPT has become a stable for applications in areas such as electric vehicles, unmanned aerial vehicles, biomedical implants, consumer electronics, and household appliances.

WPT is the answer to the issue presented by the short battery life and high initial cost of battery powered applications. The breakthrough of energy storage technology is unable to support the new generation of applications. Thus, WPT techniques have been increasingly investigated to overcome the technical bottlenecks of batteries. However, the design of WPT imposes numerous challenges. Considering WPT for low power applications such as bio-implantable systems, miniaturization and maximum efficiency of power transfer at low specific absorption rate (SAR) is the prime focus. However, in applications such as enhancing the operating lifetime of autonomous underwater vehicles (AUVs), smart WPT techniques are required to reduce the battery burden. In the case of simultaneous wireless data transmission and power transfer, the best use of the radio frequency spectrum is required. To enhance the gain and efficiency WPT, the design of antennas and passive reflect array is a challenging task.

WPT has a number of features such as flexibility, formfactor, position free, and movability that are considered an ideal choice for future power requirements. Through this Special Issue, experts and researchers in industry and academia are invited to submit their original research and review articles discussing innovative ideas for the design and applications of WPT systems.

Potential topics include but are not limited to the following:

• Mathematical modelling for wireless power transfer
• Wireless power transfer for smart electric vehicles
• Design of transmitter elements for wireless power transfer
• Wireless power transfer for low-power wireless communications
• Wireless power transfer for bioimplants and wearables
• Optimization of the wireless power transfer system
• Wireless power transfer system using software-defined radio
• Wireless power and data transfer models
• Antenna design for Wireless power transfer
• Fast wireless power transfer using UAV and drones
• Wireless power transfer for autonomous underwater vehicles
• Beamforming with beam-steering for wireless power transfer
• Multi-receiver wireless power transfer system
• Wireless power transfer at ka-band
• Electromagnetic interference impact (EMI) studies due to wireless power transfer