Method and device for detecting proximity of an external RF field during ongoing RF activity of the device
US12348343B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 9, 2023 |
| Grant date | Jul 1, 2025 |
| Priority date | — |
| Expiry date | Oct 15, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/06
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method is provided for detecting a proximity of a radio frequency (RF) field during an ongoing RF activity by a wireless device operating in reader mode. In the method, an input signal is modulated to provide a modulated RF signal comprising a plurality of RF modulation periods. The plurality of RF modulation periods are transmitted by the wireless device operating in the reader mode. An RF detector is enabled to monitor the plurality of modulation periods during the transmitting of the plurality of RF modulation periods. An external RF signal is detected when a characteristic of the plurality of RF modulation periods is different from an expected characteristic. In another embodiment, a wireless device is provided that implements the method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.