Wireless power transmission system and power receiving apparatus thereof

The dual-polarized rectenna configuration in the wireless power transmission system addresses efficiency and durability issues by using orthogonal polarization and dual rectifiers, enhancing power reception and rectifier protection.

JP2026023005APending Publication Date: 2026-02-13DENKI KOGYO CO LTD
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Patent Information

Application Number
JP2024124682
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-07-31
Publication Date
2026-02-13

AI Technical Summary

Technical Problem

Conventional microwave power transmission systems face issues with reduced power receiving efficiency due to misalignment of polarization planes between transmitting and receiving antennas, and rectifiers are prone to damage from overcurrents, especially when handling high power inputs.

Method used

A wireless power transmission system utilizing a power transmitting device with a dual-polarized rectenna configuration, comprising a first and second rectenna with orthogonal polarization characteristics, where one antenna is circularly polarized and the other is linearly polarized, allowing for efficient power reception without requiring polarization plane adjustments, and using two rectifiers to distribute power safely.

Benefits of technology

The system achieves higher power reception efficiency and durability by equally dividing received power across rectifiers, eliminating the need for complex polarization adjustments and costly rectifier upgrades, thereby maximizing power intake and reducing rectifier damage risks.

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Abstract

To maximize power reception efficiency without requiring adjustment of a polarization plane between transmission and reception, and to improve durability of a rectifier which is a component of a rectenna, in a wireless power transmission system.SOLUTION: The power reception device includes a first rectenna and a second rectenna. The first rectenna includes a first power receiving antenna and a first rectifier connected to the first power receiving antenna. The second rectenna includes a second power receiving antenna and a second rectifier connected to the second power receiving antenna. The first power receiving antenna and the second power receiving antenna have polarization characteristics orthogonal to each other, and one of the power transmission antenna and the first and second power receiving antennas is a circularly polarized antenna, and the other is a linearly polarized antenna.SELECTED DRAWING: Figure 1
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Citation Information

Patent Citations

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