RFID device with microstrip antennas
First Claim
1. A Radio Frequency Identification (RFID) device, comprising:
- first and second sides;
a first microstrip antenna extending along the first side, the first microstrip antenna comprising a microstrip positioned towards the first side, a Radio Frequency—
(RF-)reflective back plane, and a dielectric spacer positioned between the microstrip and the back plane;
a second microstrip antenna extending along the second side, the second microstrip antenna comprising a microstrip positioned towards the second side, an RF-reflective back plane, and a dielectric spacer positioned between the microstrip of the second microstrip antenna and the back plane of the second microstrip antenna; and
circuitry for receiving signals from the first and second microstrip antennas,wherein the first and second microstrip antennas are each independently coupled to the circuitry.
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Accused Products
Abstract
A Radio Frequency Identification (RFID) device such as an RFID tag according to one embodiment of the present invention includes first and second sides. A first microstrip antenna extends along the first side, the first microstrip antenna comprising a microstrip positioned towards the first side, a Radio Frequency-(RF-)reflective back plane, and a dielectric spacer positioned between the microstrip and the back plane. A second microstrip antenna extends along the second side, the second microstrip antenna comprising a microstrip positioned towards the second side, an RF-reflective back plane, and a dielectric spacer positioned between the microstrip and the back plane. The first and second microstrip antennas are each independently coupled to circuitry for receiving signals from the first and second microstrip antennas.
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Citations
23 Claims
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1. A Radio Frequency Identification (RFID) device, comprising:
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first and second sides; a first microstrip antenna extending along the first side, the first microstrip antenna comprising a microstrip positioned towards the first side, a Radio Frequency—
(RF-)reflective back plane, and a dielectric spacer positioned between the microstrip and the back plane;a second microstrip antenna extending along the second side, the second microstrip antenna comprising a microstrip positioned towards the second side, an RF-reflective back plane, and a dielectric spacer positioned between the microstrip of the second microstrip antenna and the back plane of the second microstrip antenna; and circuitry for receiving signals from the first and second microstrip antennas, wherein the first and second microstrip antennas are each independently coupled to the circuitry. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A Radio Frequency Identification (RFID) device, comprising:
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first and second sides lying along parallel planes; a first microstrip antenna extending along the first side, the first microstrip antenna comprising a microstrip positioned towards the first side, a Radio Frequency—
(RF-)reflective back plane, and a dielectric spacer positioned between the microstrip and the back plane;a second microstrip antenna extending along the second side, the second microstrip antenna comprising a microstrip positioned towards the second side, an RF-reflective back plane, and a dielectric spacer positioned between the microstrip of the second microstrip antenna and the back plane of the second microstrip antenna; circuitry for receiving signals from the first and second microstrip antennas; and a battery coupled to the circuitry, wherein the first and second microstrip antennas are each independently coupled to the circuitry, wherein the circuitry is positioned between the backplanes of the microstrip antennas, wherein the battery is positioned between the backplanes of the microstrip antennas, wherein the signals from the first and second microstrip antennas are not combined in RF. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22)
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23. A Radio Frequency Identification (RFID) device, comprising:
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first and second sides lying along parallel planes; a first microstrip antenna extending a long the first side, the first microstrip antenna comprising a microstrip positioned towards the first side, a Radio Frequency—
(RF-)reflective back plane, and a dielectric spacer positioned between the microstrip and the back plane;a second microstrip antenna extending along the second side, the second microstrip antenna comprising a microstrip positioned towards the second side, an RF-reflective back plane, and a dielectric spacer positioned between the microstrip of the second microstrip antenna and the back plane of the second microstrip antenna; circuitry for receiving signals from the first and second microstrip antennas; a battery coupled to the circuitry; and a sensor coupled to the circuitry, wherein the first and second microstrip antennas are each independently coupled to the circuitry, wherein the signals from the first and second microstrip antennas are not combined in RF, wherein the circuitry is positioned between the backplanes of the microstrip antennas, wherein the battery is positioned between the backplanes of the microstrip antennas, wherein the sensor is positioned between the backplanes of the microstrip antennas.
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Specification