Abstract
An innovative wireless power transfer (WPT) system utilizing millimeter-wave (mmWave) power for multinode charging and tracking is presented in this article. The core concept of the system revolves around the utilization of frequency-dispersive leaky-wave antenna (LWA) transmitters, enabling passive beam scanning in the far field without the need for active phased arrays. However, such a system requires a breakthrough in receiving rectenna design at mmWave frequencies, encompassing a wide frequency bandwidth, wide beamwidth, and high RF-to-dc conversion efficiency beyond 20 GHz. In this work, we introduce a pioneering mmWave rectenna design achieved through the codesign integration of a magnetoelectric (ME) dipole and high-frequency diodes, eliminating the need for complex impedance matching networks at mmWave frequencies. The proposed rectenna operates in the frequency range of 24-34.5 GHz, achieving over 50% RF-to-dc conversion efficiency for input powers exceeding 15 dBm. In addition, the rectenna demonstrates improved gain and beamwidth compared to conventional designs, enabling wide-angle reception of frequency-scanning passively beamformed mmWave signals. A practical demonstration of the proposed system showcases simultaneous wireless charging of three nodes, highlighting its notable advantages in terms of mobility, cost-effectiveness, and simplicity over conventional WPT technologies.
Original language | English |
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Pages (from-to) | 8773-8787 |
Number of pages | 15 |
Journal | IEEE Transactions on Antennas and Propagation |
Volume | 71 |
Issue number | 11 |
Early online date | 13 Sept 2023 |
DOIs | |
Publication status | Published - Nov 2023 |
Keywords
- Array signal processing
- Costs
- Millimeter wave communication
- Phased arrays
- Rectennas
- Wideband
- Wireless power transfer
- leaky-wave antenna
- mmWave
- node tracking
- rectennas
- wireless power transfer
- wireless power transfer (WPT)
- Leaky-wave antenna (LWA)
ASJC Scopus subject areas
- Electrical and Electronic Engineering