Chip-scale radio-frequency localization devices and associated systems and methods
摘要
說明書
As may be appreciated from the foregoing, in some embodiments, RF signals received by receive antenna 122 and having a first center frequency (e.g., f1=5.5 GHz) may be mixed with RF signals generated onboard target device 930 and having a second center frequency (e.g., f2=18.5 GHz) to obtain RF signals having a third center frequency that is the sum of the first and second center frequencies (e.g., f3=f2+f1=24 GHz). In such embodiments, the output of the frequency mixer 945 is the heterodyne signal corresponding to the sum of the frequencies of the input signals. In other embodiments, however, RF signals received by receive antenna 122 and having a first center frequency (e.g., f1=5.5 GHz) may be mixed with RF signals generated onboard target device having a second center frequency (e.g., 29.5 GHz) to obtain RF signals having a third center frequency that is the difference of the first and second center frequencies (e.g., f3=f2?f1=24 GHz). In such embodiments, the output of the frequency mixer 945 is the heterodyne signal corresponding to the difference of the frequencies of the input signals.
