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Sony patents antenna design to boost wireless power efficiency

Patent drawing
Patent drawing from the official filing.

Sony has filed a patent for an antenna device that captures radio waves to generate electricity. The design uses a loop-shaped wire connected to a circuit that converts AC to DC, paired with a flat plate that stands perpendicular to the loop. By adjusting the specific sizes of these parts relative to the radio wave's length, the antenna aims to capture more energy.

Why it mattersThis is a technical improvement for devices that harvest power from the air, which could help keep small sensors or gadgets running without frequent battery swaps.

In the filing’s own words

To improve gain and efficiency of an antenna included in a rectenna. An antenna device including: a first conductor having a loop shape; a rectifier circuit connected to the first conductor; and a second conductor having a plate shape and including a main surface extending in a direction substantially orthogonal to a loop surface of the first conductor, and an outer edge part of the main surface, in which the first conductor has a loop whose length with respect to a wavelength at a reception frequency is larger than 0.15, and the second conductor has the outer edge part whose minimum length with respect to the length of the loop of the first conductor is larger than 0.4.

What exactly they claim (claim 1)

1. An antenna device comprising: a first conductor having a loop shape; a rectifier circuit connected to the first conductor; and a second conductor having a plate shape and including a main surface extending in a direction substantially orthogonal to a loop surface of the first conductor, and an outer edge part of the main surface, wherein the first conductor has a loop whose length with respect to a wavelength at a reception frequency is larger than 0.15, and the second conductor has the outer edge part whose minimum length with respect to the length of the loop of the first conductor is larger than 0.4.

Facts

Company
Sony (SONY GROUP CORPORATION)
Official title
ANTENNA DEVICE AND ELECTRONIC APPARATUS
Publication number
US20260312288A1
Application number
19483632
Filed
Apr 16, 2024
Published
Oct 8, 2026
Inventors
2
Claims
20

Classified under

H01Q 7/00 Electricity & electronicsH01Q 1/248 Electricity & electronicsH01Q 1/38 Electricity & electronicsH02J 50/27 Electricity & electronics
Read the full filing (official PDF) ↗ Open in the Patent Tracker

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Summaries are simplified from the filing’s own abstract and first claim. A patent filing is not a product announcement.
Patent data and drawings: U.S. Patent and Trademark Office (USPTO). Nebula is not affiliated with or endorsed by the USPTO.