Chip-scale radio-frequency localization devices and associated systems and methods
摘要
說明書
In some embodiments, frequency multiplier 908 may be implemented as a cascade of frequency multipliers, which cascade may include one or more amplifiers, isolators, and/or one or more filters between successive frequency multipliers. For example, in some embodiments, frequency multiplier 908 may be configured to output signals having a center frequency that is four times the center frequency of the input signals provided to frequency multiplier 908. In such an example, frequency multiplier may be implemented as a single “4×” frequency multiplier or a sequence of two “2×” frequency multipliers, each of which is configured to output signals having a center frequency that is double the center frequency of the input signals provided to it. One or more amplifiers and/or filters may be provided between the “2×” frequency multipliers.
In some embodiments, frequency multiplier 908 may include a non-linear circuit. The non-linear circuit may distort input signals provided to frequency multiplier 908 to generate signals having center frequencies that are multiples of the center frequencies of the input signals. Additionally, frequency multiplier 908 may include one or more (e.g., bandpass) filters for selecting a desired center frequency for the output signals (e.g., a desired harmonic frequency) and removing the fundamental and/or one or more other harmonic frequency components from the non-linearly distorted signals.
