Method of detecting relative direction of motion of a radio frequency (RF) tag
US6204765A · kind A · utility
90Cited by
14References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 13, 1999 |
| Grant date | Mar 20, 2001 |
| Priority date | — |
| Expiry date | Mar 13, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S13/758
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of determining relative motion between a base station and an RF Tag is disclosed, wherein a property of the RF field at the position of the tag is determined at a first time and at a second time and is used to calculate the relative motion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.