Radio-frequency localization techniques and associated systems, devices, and methods
First Claim
1. A device, comprising:
- a substrate;
a semiconductor die mounted on the substrate;
a receive antenna fabricated on the substrate and configured to receive, from an interrogator device, radio-frequency (RF) signals circularly polarized in a first rotational direction and having a first center frequency;
a transmit antenna fabricated on the substrate and configured to transmit, to the interrogator device, RF signals circularly polarized in a second rotational direction different from the first rotational direction and having a second center frequency different from the first center frequency; and
circuitry integrated with the semiconductor die and configured to;
generate, from RF signals provided from the receive antenna and having the first center frequency, the RF signals having the second center frequency, and provide the generated RF signals having the second center frequency to the transmit antenna for transmission.
1 Assignment
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Accused Products
Abstract
A system comprising synchronization circuitry, a first interrogator, and a second interrogator. The first interrogator includes a transmit antenna; a first receive antenna, and circuitry configured to generate, using radio-frequency (RF) signal synthesis information received from the synchronization circuitry, a first RF signal for transmission by the transmit antenna, and generate, using the first RF signal and a second RF signal received from a target device by the first receive antenna, a first mixed RF signal indicative of a distance between the first interrogator and the target device. The second interrogator includes a second receive antenna, and circuitry configured to generate, using the RF signal synthesis information, a third RF signal; and generate, using the third RF signal and a fourth RF signal received from the target device by the second receive antenna, a second mixed RF signal indicative of a distance between the second interrogator and the target device.
166 Citations
20 Claims
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1. A device, comprising:
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a substrate; a semiconductor die mounted on the substrate; a receive antenna fabricated on the substrate and configured to receive, from an interrogator device, radio-frequency (RF) signals circularly polarized in a first rotational direction and having a first center frequency; a transmit antenna fabricated on the substrate and configured to transmit, to the interrogator device, RF signals circularly polarized in a second rotational direction different from the first rotational direction and having a second center frequency different from the first center frequency; and circuitry integrated with the semiconductor die and configured to; generate, from RF signals provided from the receive antenna and having the first center frequency, the RF signals having the second center frequency, and provide the generated RF signals having the second center frequency to the transmit antenna for transmission. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system, comprising:
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an interrogator device, comprising; a first substrate; a first semiconductor die mounted on the first substrate; a first transmit antenna fabricated on the first substrate and configured to transmit, to a target device, radio-frequency (RF) signals circularly polarized in a first rotational direction and having a first center frequency; a first receive antenna fabricated on the first substrate and configured to receive, from the target device, RF signals circularly polarized in a second rotational direction different from the first rotational direction and having a second center frequency different from the first center frequency; and first circuitry integrated with the first semiconductor die and configured to provide RF signals to the first transmit antenna and to receive RF signals from the first receive antenna; and the target device, comprising; a second substrate; a second semiconductor die mounted on the second substrate; a second receive antenna fabricated on the second substrate and configured to receive, from the interrogator device, RF signals circularly polarized in the first rotational direction and having the first center frequency; a second transmit antenna fabricated on the second substrate and configured to transmit, to the interrogator device, RF signals circularly polarized in the second rotational direction and having the second center frequency; and second circuitry integrated with the second semiconductor die and configured to; generate, from RF signals provided from the second receive antenna and having the first center frequency, RF signals having the second center frequency, and provide the generated RF signals having the second center frequency to the second transmit antenna for transmission. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. A method for determining a location of a target device comprising a substrate relative to an interrogator device comprising a substrate, the method comprising:
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transmitting, using a first transmit antenna disposed on the substrate of the interrogator device, a first radio-frequency (RF) signal having a first center frequency and circularly polarized in a first rotational direction; receiving, using a second receive antenna disposed on the substrate of the target device, a second RF signal having the first center frequency and circularly polarized in the first rotational direction, the second RF signal resulting from propagation of the first RF signal; generating, from the second RF signal and using signal transformation circuitry formed in a semiconductor die disposed on the substrate of the target device, a third RF signal having a second center frequency that is different from the first center frequency; transmitting, using a second transmit antenna disposed on the substrate of the target device, a fourth RF signal having a second center frequency and circularly polarized in a second rotational direction different from the first rotational direction, the fourth RF signal generated using the third RF signal; receiving, using a first receive antenna disposed on the substrate of the interrogator device, a fifth RF signal circularly polarized in the second rotational direction, the RF fifth signal resulting from propagation of the fourth RF signal; and determining the location of the target device using the fifth signal. - View Dependent Claims (20)
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Specification