Radio frequency identification tag antenna configurations
5 Assignments
0 Petitions
Accused Products
Abstract
A radio frequency identification (RFID) architecture is described. RFID tags are interrogated by a reader, which may be located in a network of readers. The reader transmits symbols to the tags. Tags respond to the interrogations with symbols that each represent one or more bits of data. An RFID tag includes an antenna pad, a receiver, a state machine, and a modulator. The receiver is coupled to the antenna pad. The receiver receives a symbol from the antenna pad and outputs a received signal. The state machine is configured to determine a response symbol from the received signal and an operating state of the tag. The modulator is coupled to the antenna pad. The modulator is configured to backscatter modulate the received symbol with the response symbol. The modulator is configured to output the backscatter modulated symbol to the antenna pad.
126 Citations
36 Claims
-
1-20. -20. (canceled)
-
21. A radio frequency identification (RFID) tag device, comprising:
-
a substrate;
an integrated circuit (IC) die mounted to said substrate, said IC die having first and second radio frequency (RF) input pads;
a first antenna formed on said substrate, and coupled to said first RF input pad; and
a second antenna formed on said substrate, and coupled to said second RF input pad;
wherein said first antenna is configured to operate in a first frequency band and said second antenna is configured to operate in a second frequency band, wherein said first frequency band is different from said second frequency band.
-
-
22. A radio frequency identification (RFID) tag device, comprising:
-
a substrate;
an integrated circuit (IC) die mounted to said substrate, said IC die having a plurality of radio frequency (RF) input pads;
a plurality of antennas formed on said substrate, each coupled to a corresponding one of the plurality of RF input pads; and
wherein each of said plurality of antennas is configured to operate at a corresponding frequency band different from frequency bands of the others of said plurality of antennas.
-
-
23. A radio frequency identification (RFID) tag device, comprising:
-
a substrate;
an integrated circuit (IC) die mounted to said substrate, said IC die having first and second radio frequency (RF) input pads;
a first antenna formed on said substrate and coupled to said first RF input pad; and
a second antenna formed on said substrate and coupled to said second RF input pad;
wherein said first antenna has a first orientation and said second antenna has a second orientation, wherein said first orientation is different from said second orientation. - View Dependent Claims (24, 25, 26, 27, 28, 29)
-
-
30. A radio frequency identification (RFID) tag device, comprising:
-
a substrate;
an integrated circuit (IC) die mounted to said substrate, said IC die having a plurality of radio frequency (RF) input pads;
a plurality of antennas formed on said substrate, each antenna coupled to a corresponding one of the plurality of RF input pads; and
wherein each of said plurality of antennas has a corresponding orientation different from orientations of others of said plurality of antennas. - View Dependent Claims (31, 32, 33)
-
-
34. A radio frequency identification (RFID) tag device, comprising:
-
a substrate;
an integrated circuit (IC) die mounted to said substrate, said IC die having first and second radio frequency (RF) input pads;
a first antenna formed on said substrate and coupled to said first RF input pad; and
a second antenna formed on said substrate and coupled to said second RF input pad;
wherein said first antenna is positioned on said substrate at distance from said second antenna, wherein said distance is greater than or equal to ½
of a wavelength of a radio frequency (RF) signal of interest.
-
-
35. A radio frequency identification (RFID) tag device, comprising:
-
a substrate;
an integrated circuit (IC) die mounted to said substrate, said IC die having a first radio frequency (RF) input pad, a second RF input pad, and a ground pad;
a first antenna formed on said substrate and coupled between said first RF input pad and said ground pad; and
a second antenna formed on said substrate and coupled between said second RF input pad and said ground pad.
-
-
36. A radio frequency identification (RFID) tag device, comprising:
-
a substrate;
an integrated circuit (IC) die mounted to said substrate, said IC die having a first radio frequency (RF) pad, a second RF pad, a third RF pad, and a fourth RF pad;
a first antenna formed on said substrate and coupled between said first RF pad and said second RF pad; and
a second antenna formed on said substrate and coupled between said third RF pad and said fourth RF pad.
-
Specification