Radio-frequency localization techniques and associated systems, devices, and methods
First Claim
1. A device, comprising:
- a receive antenna configured to receive a first radio-frequency (RF) signal having a first center frequency;
a first transmit antenna configured to transmit a second RF signal having a second center frequency that is a harmonic of the first center frequency;
a second transmit antenna configured to transmit a third RF signal having a third center frequency that is a harmonic of the first center frequency and is different from the second center frequency;
first circuitry, coupled to the receive antenna and to the first transmit antenna, configured to generate the second RF signal using the first RF signal and provide the second RF signal to the first transmit antenna for transmission; and
second circuitry, coupled to the receive antenna and to the second transmit antenna, configured to generate the third RF signal using the first RF signal and provide the third RF signal to the second transmit antenna for transmission.
1 Assignment
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Accused Products
Abstract
A system comprising a first interrogator device that includes: a first antenna configured to transmit, to a target device, a first radio-frequency (RF) signal having a first center frequency; a second antenna configured to receive, from the target device, a second RF signal having a second center frequency that is a harmonic of the first frequency; and first circuitry configured to obtain, using the first RF signal and the second RF signal, a first mixed RF signal indicative of a first distance between the first interrogator and the target device. The system further comprises at least one processor configured to determine the first distance based, at least in part, on the first mixed RF signal, and determine a location of the target device based, at least in part, on the determined first distance.
133 Citations
20 Claims
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1. A device, comprising:
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a receive antenna configured to receive a first radio-frequency (RF) signal having a first center frequency; a first transmit antenna configured to transmit a second RF signal having a second center frequency that is a harmonic of the first center frequency; a second transmit antenna configured to transmit a third RF signal having a third center frequency that is a harmonic of the first center frequency and is different from the second center frequency; first circuitry, coupled to the receive antenna and to the first transmit antenna, configured to generate the second RF signal using the first RF signal and provide the second RF signal to the first transmit antenna for transmission; and second circuitry, coupled to the receive antenna and to the second transmit antenna, configured to generate the third RF signal using the first RF signal and provide the third RF signal to the second transmit antenna for transmission. - View Dependent Claims (2, 3, 4, 5)
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6. A device, comprising:
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a transmit antenna configured to transmit, to a target device, a first radio-frequency (RF) signal having a first center frequency; a first receive antenna configured to receive, from the target device, a second RF signal having a second center frequency that is a harmonic of the first center frequency; a second receive antenna configured to receive, from the target device, a third RF signal having a third center frequency that is a harmonic of the first center frequency and is different from the second center frequency; first circuitry configured to obtain, using the first RF signal and the second RF signal, a first mixed RF signal indicative of a first distance between the device and the target device; and second circuitry configured to obtain, using the first RF signal and the third RF signal, a second mixed RF signal indicative of a second distance between the device and the target device. - View Dependent Claims (7, 8, 9, 10)
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11. A device, comprising:
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a first receive antenna configured to receive a first radio-frequency (RF) signal having a first center frequency; a second receive antenna configured to receive a second RF signal having a second center frequency; a first transmit antenna configured to transmit a third RF signal having a third center frequency different from each of the first and second center frequencies; a second transmit antenna configured to transmit a fourth RF signal having a fourth center frequency different from each of the first, second, and third center frequencies; and circuitry comprising; a frequency mixer configured to generate a fifth RF signal by using the first RF signal and the second RF signal; first circuitry configured to generate the third RF signal using the fifth RF signal; and second circuitry configured to generate the fourth RF signal using the fifth RF signal. - View Dependent Claims (12, 13, 14, 15)
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16. A device, comprising:
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a first transmit antenna configured to transmit, to a target device, a first radio-frequency (RF) signal having a first center frequency; a second transmit antenna configured to transmit, to the target device, a second RF signal having a second center frequency; a first receive antenna configured to receive, from the target device, a third RF signal having a third center frequency different from each of the first and second center frequencies; a second receive antenna configured to receive, from the target device, a fourth RF signal having a fourth center frequency different from each of the first, second, and third center frequencies; first circuitry configured to obtain, using the first RF signal, the second RF signal, and the third RF signal, a first mixed RF signal indicative of a first distance between the device and the target device; and second circuitry configured to obtain, using the first RF signal, the second RF signal, and the fourth RF signal, a second mixed RF signal indicative of a second distance between the device and the target device. - View Dependent Claims (17, 18, 19, 20)
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Specification