Tags, wireless communication systems, tag communication methods, and wireless communications methods
First Claim
1. A tag comprising:
- a plurality of antennas configured to receive a plurality of first wireless communication signals comprising data from a reader;
a plurality of rectifying circuits coupled with respective individual ones of the antennas and configured to provide rectified signals corresponding to the first wireless communication signals, wherein the rectified signals are combined to produce a composite signal;
an adaptive reference circuit configured to vary a reference signal responsive to the composite signal;
a comparator coupled with the adaptive reference circuit and the rectifying circuits and configured to compare the composite signal with respect to the reference signal and to output the data responsive to the comparison; and
processing circuitry configured to receive the data from the comparator and to process the data.
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Abstract
Tags, wireless communication systems, tag communication methods, and wireless communications methods are described. In one aspect, a tag includes a plurality of antennas configured to receive a plurality of first wireless communication signals comprising data from a reader, a plurality of rectifying circuits coupled with respective individual ones of the antennas and configured to provide rectified signals corresponding to the first wireless communication signals, wherein the rectified signals are combined to produce a composite signal, an adaptive reference circuit configured to vary a reference signal responsive to the composite signal, a comparator coupled with the adaptive reference circuit and the rectifying circuits and configured to compare the composite signal with respect to the reference signal and to output the data responsive to the comparison, and processing circuitry configured to receive the data from the comparator and to process the data.
40 Citations
21 Claims
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1. A tag comprising:
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a plurality of antennas configured to receive a plurality of first wireless communication signals comprising data from a reader;
a plurality of rectifying circuits coupled with respective individual ones of the antennas and configured to provide rectified signals corresponding to the first wireless communication signals, wherein the rectified signals are combined to produce a composite signal;
an adaptive reference circuit configured to vary a reference signal responsive to the composite signal;
a comparator coupled with the adaptive reference circuit and the rectifying circuits and configured to compare the composite signal with respect to the reference signal and to output the data responsive to the comparison; and
processing circuitry configured to receive the data from the comparator and to process the data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A wireless communication system comprising:
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a reader configured to output a plurality of first wireless communication signals comprising data; and
a tag comprising a plurality of antennas configured to receive the first wireless communication signals from the reader, processing circuitry configured to receive the data of the first wireless communication signals and to control backscatter modulation of radio frequency energy to communicate a plurality of second wireless communication signals to the reader, and a battery configured to provide operational electrical energy to the processing circuitry. - View Dependent Claims (18, 19, 20)
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21-43. -43. (canceled)
Specification