Detecting proximity using antenna feedback
US9769769B2 · kind B2 · utility
15Cited by
53References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 30, 2014 |
| Grant date | Sep 19, 2017 |
| Priority date | — |
| Expiry date | Nov 21, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W52/367
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An electronic device provides a detuning monitor circuit configured to detect a change in a voltage standing wave ratio (VSWR) between a radio frequency (RF) transmitter and an RF antenna relative to a predetermined VSWR baseline and a proximity detector circuit configured to adjust transmission power of a carrier wave transmitted from the RF transmitter, if the change fails to satisfy an acceptable VSWR condition. Network proximity detectors are also provided to allow coordination of antenna subsystems to comply with specific absorption rate (SAR) constraints and/or maintain/improve antenna performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.