Sep 15, 2026

US12736309 - Multiple and broadband stealth structure

A multiple and broadband stealth structure comprises a radar absorption unit that absorbs broadband microwave, a low-frequency transmission filter unit that is stacked on an upper portion of the radar absorption unit, and an infrared radiation unit that is combined with the low-frequency transmission filter unit to selectively emit infrared ray, thereby selectively controlling the infrared emissivity of the surface to emit infrared radiation only through an atmospheric absorption window with a low infrared transmittance and to avoid the infrared detection system.

Assignee: Industry-academic Cooperation Foundation, YONSEI UNIVERSITY
Inventors: Hyung Hee Cho, Nam Kyu Lee, Joon Soo Lim, In Joong Chang, Hyung Mo Bae, Ju Yeong Nam
Filing date: 2024-03-06

The patent describes a stealth structure designed to absorb broadband microwave and selectively emit infrared radiation, enhancing concealment from detection systems. It includes a radar absorption unit, a low-frequency transmission filter, and an infrared radiation unit, with specific geometric configurations to optimize performance.

Claim 1

1 . A multiple and broadband stealth structure, comprising: a radar absorption unit configured to absorb broadband microwave; a low-frequency transmission filter unit disposed on an upper portion of the radar absorption unit; and an infrared radiation unit combined with the low-frequency transmission filter unit to selectively emit infrared radiation, wherein the radar absorption unit includes: a thin film; a first dielectric layer extending upward from an edge of the thin film; and a first seating member having four triangles in which vertices of the four triangles are positioned at one center, and the four triangles are arranged radially from the one center, the first seating member being disposed on an upper surface of the thin film. a radar absorption unit configured to absorb broadband microwave; a low-frequency transmission filter unit disposed on an upper portion of the radar absorption unit; and an infrared radiation unit combined with the low-frequency transmission filter unit to selectively emit infrared radiation, wherein the radar absorption unit includes: a thin film; a first dielectric layer extending upward from an edge of the thin film; and a first seating member having four triangles in which vertices of the four triangles are positioned at one center, and the four triangles are arranged radially from the one center, the first seating member being disposed on an upper surface of the thin film.

Google Patents

https://patents.google.com/patent/US12736309

USPTO PDF

https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/12736309