# Power Without Wires: Advancing KHz, MHz and Microwave Rectennas for Wireless Power Transfer with a Focus on India-Based R&D

## TL;DR

This paper reviews India's advancements in wireless power transfer technologies, focusing on cost-effective and context-specific designs for applications like electric vehicles and IoT.

## Contribution

The paper provides a systematic analysis of India's WPT research from 2018–2024, highlighting regional innovation patterns and proposing a research agenda aligned with India's development goals.

## Key findings

- Indian research emphasizes misalignment-tolerant magnetic coupling and high-frequency converters in near-field WPT.
- Far-field WPT in India shows progress in rectenna designs for improved IoT network efficiency.
- The paper identifies research gaps and proposes benchmarks for future WPT innovation in India.

## Abstract

Wireless power transfer (WPT) technologies are advancing rapidly, yet their development trajectories within specific regional contexts remain underexplored. This review synthesizes India’s contributions to both near-field and far-field WPT research. We conducted a systematic literature survey spanning 2018–2024 to identify dominant technological themes, benchmark performance against global standards, and analyze innovation patterns within India’s research ecosystem. The review reveals a consistent focus on robust, cost-effective, and context-appropriate designs across both domains. In near-field WPT, Indian research emphasizes misalignment-tolerant magnetic coupling and high-frequency power converters for applications including electric vehicle charging and biomedical implants. In far-field WPT, progress is evident in rectenna architectures that enhance angular coverage and efficiency, particularly for IoT networks. We consolidate quantitative performance metrics from the literature to establish reference benchmarks and delineate persistent research gaps. We propose a forward-looking research agenda aimed at aligning WPT innovation with India’s sustainable development goals and energy accessibility challenges. This analysis provides a foundation for understanding how regional ecosystems shape technological priorities and offers insights for global WPT development.