RFID tag with modifiable and reversible read range
First Claim
Patent Images
1. A system comprisinga radio frequency identification (RFID) device and an antenna coupled to the RFID device, the RFID device comprising:
- a read range control circuitry coupled to the antenna;
the read range control circuitry to modify a read range of the antenna between a first read range and a second read range;
wherein the RFID device is to obtain its operating power from a radio frequency signal received through the antenna.
1 Assignment
0 Petitions
Accused Products
Abstract
According to some embodiments, read range control update information is received in a radio frequency (RF) signal. The information is used to control a read range of an antenna. The read range of the antenna can be increased or deceased, for example, by changing an impedance of the antenna.
-
Citations
21 Claims
-
1. A system comprising
a radio frequency identification (RFID) device and an antenna coupled to the RFID device, the RFID device comprising: -
a read range control circuitry coupled to the antenna; the read range control circuitry to modify a read range of the antenna between a first read range and a second read range; wherein the RFID device is to obtain its operating power from a radio frequency signal received through the antenna. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A method comprising:
-
receiving, through an antenna of a radio frequency identification (RFID) device, a radio frequency (RF) signal that provides operating power for the RFID device, the RF signal containing read range update information; and updating a read range capability of the antenna according to the read range update information; wherein the read range update information specifies one of two or more pre-specified read ranges. - View Dependent Claims (11, 12, 13, 14, 15, 16, 21)
-
-
17. A method comprising:
-
sending a radio frequency (RF) signal containing read range update information to a radio frequency identification device that receives its operating power from the RF signal; wherein the read range update information specifies one of two or more pre-specified read ranges. - View Dependent Claims (18, 19, 20)
-
Specification