RFID reader and active tag
First Claim
1. An RFID reader and active tag (RAT), comprising:
- a first plurality of antennas;
a first fixed phase variable gain beam forming interface coupled to the first plurality of antennas;
a wireless interface configured to communicate through the first fixed phase variable gain beam forming interface with an access point;
a second plurality of antennas;
a second fixed phase variable gain beam forming interface coupled to the second plurality of antennas; and
an RFID interface configured to interrogate RFID tags through the second fixed phase variable gain beam forming interface.
0 Assignments
0 Petitions
Accused Products
Abstract
In one embodiment, an RFID reader and active tag (RAT) includes: a first beam forming means for interrogating a plurality of RFID tags using at least a first set of two antennas coupled to a first fixed phase feed network, the beam forming means being configured to adjust gains in the first fixed phase feed network to scan with respect to the plurality of RFID tags; and a second beam forming means for uploading RFID data from the interrogated plurality of RFID tags to an external access point using at least a second set of two antennas coupled to a second fixed phase feed network, the beam forming means being configured to adjust gains in the second fixed phase feed network to direct its RF beam at the external access point.
46 Citations
16 Claims
-
1. An RFID reader and active tag (RAT), comprising:
-
a first plurality of antennas;
a first fixed phase variable gain beam forming interface coupled to the first plurality of antennas;
a wireless interface configured to communicate through the first fixed phase variable gain beam forming interface with an access point;
a second plurality of antennas;
a second fixed phase variable gain beam forming interface coupled to the second plurality of antennas; and
an RFID interface configured to interrogate RFID tags through the second fixed phase variable gain beam forming interface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A method, comprising:
-
beam forming to scan through a plurality of items to interrogate a corresponding plurality of RFID tags so as to obtain RFID data;
storing the RFID data in a memory; and
uploading the stored RFID data to an external access point. - View Dependent Claims (13, 14, 15)
-
-
16. An RFID reader and active tag (RAT), comprising:
-
a first beam forming means for interrogating a plurality of RFID tags using at least a first set of two antennas coupled to a first fixed phase feed network, the beam forming means being configured to adjust gains in the first fixed phase feed network to scan with respect to the plurality of RFID tags; and
a second beam forming means for uploading RFID data from the interrogated plurality of RFID tags to an external access point using at least a second set of two antennas coupled to a second fixed phase feed network, the beam forming means being configured to adjust gains in the second fixed phase feed network to direct its RF beam at the external access point.
-
Specification