US12283749 - Active chaff
The patent describes an electronic countermeasure device designed to absorb and reradiate radar frequencies, enhancing its radar cross section when deployed from mobile platforms like aerial or sea-based vehicles. The device utilizes a conductive polymer and graphene composition for its antenna element, allowing it to emit a second radio frequency that is distinct from the platform’s signature.
Claim 1
- A chaff electronic countermeasure device comprising: an antenna element in communication with a substrate; an integrated circuit in electrical communication with the conductive antenna element; wherein the conductive antenna element comprises a conductive composition; the conductive composition comprises a conductive polymer and graphene sheets; the device is configured to absorb from a radar source a first radio frequency having a first amplitude; the device is configured to be dispersed aerially from a mobile platform; the mobile platform is an aerial platform or a sea-based platform; in response to absorbing the first radio frequency, the device is configured to reradiate at least a portion of a second radio frequency having a second amplitude toward the radar source, thereby resulting in an increased radar cross section of the device as perceived by the radar source; the second radio frequency corresponds to a radio frequency signature that is not associated with the aerial platform or the sea-based platform; and the second amplitude is higher than the first amplitude. an antenna element in communication with a substrate; an integrated circuit in electrical communication with the conductive antenna element; wherein the conductive antenna element comprises a conductive composition; the conductive composition comprises a conductive polymer and graphene sheets; the device is configured to absorb from a radar source a first radio frequency having a first amplitude; the device is configured to be dispersed aerially from a mobile platform; the mobile platform is an aerial platform or a sea-based platform; in response to absorbing the first radio frequency, the device is configured to reradiate at least a portion of a second radio frequency having a second amplitude toward the radar source, thereby resulting in an increased radar cross section of the device as perceived by the radar source; the second radio frequency corresponds to a radio frequency signature that is not associated with the aerial platform or the sea-based platform; and the second amplitude is higher than the first amplitude. the conductive antenna element comprises a conductive composition; the conductive composition comprises a conductive polymer and graphene sheets; the device is configured to absorb from a radar source a first radio frequency having a first amplitude; the device is configured to be dispersed aerially from a mobile platform; the mobile platform is an aerial platform or a sea-based platform; in response to absorbing the first radio frequency, the device is configured to reradiate at least a portion of a second radio frequency having a second amplitude toward the radar source, thereby resulting in an increased radar cross section of the device as perceived by the radar source; the second radio frequency corresponds to a radio frequency signature that is not associated with the aerial platform or the sea-based platform; and the second amplitude is higher than the first amplitude.
Google Patents
https://patents.google.com/patent/US12283749
USPTO PDF
https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/12283749