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US 12,768,928 B2Granted
Subharmonic tags for localization, ranging, and navigation in GPS-denied environments
AssigneeNortheastern University
InventorsCristian Cassella, Hussein Hussein
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Abstract
Provided herein are methods and systems for quasi-harmonic tags (qHT) including an electromagnetic resonator, an input mesh including an input notch filter having a resonant frequency of ωinput, an output mesh including an output notch filter having a resonant frequency of ωoutput; and an antenna, wherein the qHT is configured to emit a comb output signal responsive to an input signal having an input frequency (op twice a resonance frequency of at least one of the electromagnetic resonators.
Claims20
A quasi-harmonic tag (qHT) comprising:
- an electromagnetic resonator;
- an input mesh including an input notch filter having a resonant frequency of ωinput;
- an output mesh including an output notch filter having a resonant frequency of ωoutput;
- and
- an antenna,
- wherein the qHT is configured to emit a comb output signal responsive to an input signal having an input frequency ωp twice a resonance frequency of the electromagnetic resonator.
3 more elements
Dependencies are inferred from the claim text.