USPTO Patent Granted for Ambient Power Device Secure Communications

ChangeBridge: Patent Grants - Power Supply (H02J)

Published March 24th, 2026

Detected March 25th, 2026

Summary

The USPTO has granted a patent to Cypress Semiconductor Corporation for a method of secure communications initiated by ambient power (AMP) devices. The patent describes a process where AMP devices use backscattered radio frequency energy to request and initiate encrypted wireless communication sessions with powered wireless devices.

View original document View source feed page

What changed

The United States Patent and Trademark Office (USPTO) has granted patent US12587232B2 to Cypress Semiconductor Corporation for an invention related to secure communications initiated by ambient power (AMP) devices. The patent details a method where AMP devices, which harvest environmental energy, use backscattered radio frequency (RF) signals to transmit initialization requests containing their identifier. This process triggers a response from a powered wireless device, leading to the initiation of an encrypted wireless communication session.

This patent grant is primarily an intellectual property matter and does not impose direct regulatory obligations on companies. However, it signifies a technological advancement in secure communication for low-power devices. Companies operating in the IoT, wireless communication, and semiconductor sectors should be aware of this patented technology, as it may impact future product development and licensing strategies.

Source document (simplified)

← USPTO Patent Grants

Ambient power device-initiated secure communications using wireless backscattering

Grant US12587232B2 Kind: B2 Mar 24, 2026

Assignee

Cypress Semiconductor Corporation

Inventors

Hui Luo, Rakesh Taori

Abstract

A method includes backscattering, by an ambient power (AMP) device that harvests environmental energy, radio frequency (RF) energy received in a wireless signal from at least one of a powered wireless device or a helper wireless device. The method includes causing, by the AMP device, an initialization request frame to be transmitted to the powered wireless device within a backscattered signal using a first spreading code. The first spreading code can encode a predetermined bit pattern, which is recognizable by the powered wireless device, and an identifier (ID) of the AMP device. The method includes receiving, by the AMP device, from the powered wireless device, an ID request frame in response to the powered wireless device detecting the initialization request frame and recognizing the ID of the AMP device. The ID request frame can trigger an attempt to initiate an encrypted wireless communication session with the powered wireless device.