Wireless Power Transfer and Hybrid Energy Harvesting

Dear Colleagues,

The rapid proliferation of wireless technologies, the Internet of Things (IoT), wearable technologies, autonomous systems, and sustainable infrastructure has intensified the demand for innovative energy solutions that transcend traditional wired power delivery. Wireless power transfer (WPT) and hybrid energy harvesting (HEH) technologies have emerged as transformative paradigms, enabling seamless, efficient, and environmentally sustainable energy delivery across diverse applications. This Special Issue aims to explore recent innovations, emerging methodologies, and interdisciplinary approaches that enable efficient, scalable, and sustainable power solutions through the use of WPT and HEH technologies.

Wireless power transfer technologies, including inductive coupling, magnetic resonance, radio frequency (RF) energy transfer, and laser-based systems, are redefining how energy is transmitted across distances. These systems eliminate the constraints of physical connectors, enabling applications ranging from implantable medical devices and electric vehicle charging to industrial automation and smart cities. However, challenges such as efficiency optimization over varying distances, electromagnetic interference (EMI) mitigation, scalability, and safety standards remain pivotal areas for innovation.

Complementing WPT, hybrid energy harvesting integrates multiple ambient energy sources—such as solar, thermal, vibrational, RF, and piezoelectric—to create robust, self-sustaining power systems. By synergizing diverse energy inputs, HEH systems enhance reliability, extend operational lifespans, and reduce dependency on single-source solutions. This approach is particularly critical for applications in remote sensing, wearable electronics, and IoT networks, where energy availability is unpredictable or scarce.

For this Special Issue, we seek submissions of original research articles, reviews, and case studies that address key technical challenges and propose novel solutions in the areas of system design, efficiency optimization, materials innovation, circuit architectures, energy storage integration, and real-world applications. We invite contributions that explore theoretical breakthroughs, experimental validations, and real-world implementations of WPT and HEH technologies. Topics of interest include, but are not limited to, the following:

• Advanced WPT architectures: Inductive, capacitive, resonant, RF, optical methods, near-field and far-field techniques, metamaterial-enhanced coupling, beamforming, and multi-receiver systems.
• Hybrid energy-harvesting systems: Multilti-source integration, energy-aware algorithms, and adaptive power management circuits.
• Energy-harvesting-enabled sensor networks and IoT devices.
• Material innovations: High-efficiency coils, piezoelectric nanomaterials, and flexible/stretchable energy harvesters for wearable applications.
• System optimization: Machine-learning-driven efficiency enhancement, dynamic impedance matching, and thermal management.
• Sustainability and scalability: Lifecycle analysis, recyclable materials, and low-cost deployment strategies for large-scale networks.
• Emerging applications: IoT, WPT/HEH in biomedical implants, underwater systems, aerospace, 5G/6G networks, mart agriculture, smart homes, and smart cities.
• Biomedical and implantable device powering.
• Applications in smart homes, wearables, industrial automation, and remote monitoring.

This Special Issue also emphasizes cross-disciplinary collaboration, bridging gaps between electrical engineering, materials science, signal processing, and industrial design. By fostering dialogue between academia, industry, and policymakers, this Special Issue aims to accelerate the transition from laboratory prototypes to commercially viable eco-conscious solutions.

Dr. Gerald K. Ijemaru
Guest Editor

Manuscript Submission Information

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• wireless power transfer
• hybrid energy harvesting
• IoT
• sustainable energy
• RF harvesting
• inductive coupling
• energy autonomy
• energy management
• multi-source systems
• biomedical power systems
• wearable electronics
• wireless sensor networks
• smart infrastructure
• resonant wireless charging