Chip-scale radio-frequency localization devices and associated systems and methods
摘要
說(shuō)明書
It should be appreciated that although, in some embodiments, each of the receive-only interrogators 1404, 1406, and 1408 is configured to provide information to master interrogator 1402 via data lines 1414, in other embodiments, each receive-only interrogator as well as the master interrogator may provide information indicative of the distance between the receive interrogator and the target device to a separate processor (e.g., a processor not part of any interrogator device and, for example, on a separate semiconductor die) for further processing.
In some embodiments, during operation of system 1400, master interrogator 1402 may: (1) receive, via lines 1412, a fixed-frequency reference signal; (2) generate, using the fixed-frequency reference signal, an RF signal for transmission (e.g., an RF signal having a first center frequency); and (3) transmit the generated RF signal to a target device via the master interrogator's transmit antenna. The target device may receive the RF signal transmitted by the interrogator 1402, transform the received RF signal (e.g., by doubling its frequencies) to obtain a transformed RF signal having a second center frequency that is a harmonic of the first center frequency (e.g., twice the first center frequency), and transmit the transformed RF signal using a transmit antenna onboard the target device. Each of the interrogators 1402, 1404, 1406, and 1406 may receive, via their respective receive antennas, a version of the transformed RF signal.
