MULTIBAND HARVESTING SYSTEMS AND METHODS INCLUDING SWITCHING NETWORKS

摘要

Examples described herein include systems and methods for multiband harvesting. An example system may include a single wideband antenna followed by several narrowband rectifier chains. Each rectifier chain may include a bandpass filter, a tuned impedance matching network, and a rectifier. The outputs of the rectifiers may be combined using a summation network. The summation network, which may be a diode summation network, may in some examples provide good performance even when only a subset o the narrowband harvesters (e.g. a subset of the rectifier chains) is excited.

主权项

1. A system comprising:
a wideband antenna configured to receive wireless signals from at least a first type of signal source configured to transmit in a first frequency band, and at least a second type of signal source configured to transmit in a second frequency band, different from the first frequency band; a first circuitry branch including:
a first bandpass filter configured to pass at least a portion of the first frequency band;a first matching network coupled to the first bandpass filter; anda first rectifier coupled to the first matching network: a second circuitry branch including:
a second bandpass filter configured to pass at least a portion of the second frequency band:a second matching network coupled to the first bandpass filter; anda second rectifier coupled to the first matching network, wherein outputs of the first and second rectifier are configured to couple in series to an output; a first switch positioned to disconnect the first rectifier from the output when a voltage provided by the first rectifier is below a first threshold; and as second switch positioned to disconnect the second rectifier from the output when a voltage provided b the second rectifier is below a second threshold.