Low-Frequency Tag with Separate Transmit and Receive Antennas
First Claim
1. A two-way low frequency inductive two-way radio transceiver tag, wherein the tag comprises a transmit antenna and a separate receiving antenna, and wherein the impedance of the receiving antenna is greater than the impedance of the transmitting antenna.
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Accused Products
Abstract
A low frequency inductive two-way radio transceiver tag is provided that has separate antennas for transmitting and receiving signals within a reading volume. Thus, the tag of the invention includes both a transmit antenna and a receiving antenna, either separately or as a single antenna tuneable between two functional states with different impedances. The impedance of the receiving antenna is greater than the impedance of the transmitting antenna. For example, the impedance of the receiving antenna may be greater than the impedance of the transmitting antenna by a factor of 103.
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Citations
15 Claims
- 1. A two-way low frequency inductive two-way radio transceiver tag, wherein the tag comprises a transmit antenna and a separate receiving antenna, and wherein the impedance of the receiving antenna is greater than the impedance of the transmitting antenna.
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6. A system comprising:
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(a) a read antenna effective to transmit signals to and receive signals from a low frequency inductive two-way radio transceiver tag, and (b) one or more two-way low frequency inductive two-way radio transceiver tag, wherein the tag comprises a transmit antenna, and a separate receiving antenna, and wherein the impedance of the receiving antenna is greater than the impedance of the transmitting antenna. in accordance with the invention. - View Dependent Claims (7, 8, 9, 10)
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Specification