Antenna array for passively modulating radio frequency signals

Abstract

Antenna Array for passively modulating radio frequency signals. Specifically, an antenna array or system comprising a plurality of retroreflective antennas configured to passively receive a radiofrequency (RF) signal from a source, and configured to reflect the RF signal; and a passive modulation circuit, electrically connected to the plurality of retroreflective antennas, configured to modulate the RF signal to represent a code, wherein the code comprises information, and further comprising: a plurality of RF switches. Additionally, a method for passively reflecting modulated signals, comprising generating a radiofrequency (RF) signal at a source; receiving the a RF signal with a plurality of retroreflective antennas; passively modulating the signal's amplitude to create a modulated RF signal, wherein the modulated RF signal comprises a code, and wherein the code further comprises a unique identifier associated with the plurality of retroreflective antennas; and passively reflecting a modulated signal back to the source.

Dependencies are inferred from the claim text.