Passive Radiative Cooling Film for Antennas

Organization Name

3M Innovative Properties Company

Inventor(s)

Timothy J. Hebrink of Scandia MN US

Pontus S.B. Broddner of Sundbyberg SE

John P. Baetzold of North St. Paul MN US

Derek J. Dehn of Maplewood MN US

Charles A. Hill of St. Paul MN US

Passive Radiative Cooling Film for Antennas

This abstract first appeared for US patent application 18850179 titled 'Passive Radiative Cooling Film for Antennas

Original Abstract Submitted

A cooling film for use in passively cooling an antenna includes an antisoiling layer secured to a first major surface of a reflective microporous layer. The reflective microporous layer comprises a first fluoropolymer and is diffusely reflective of electromagnetic radiation over a majority of wavelengths in the range of 400 to 2500 nanometers. The film can also include an infrared-absorptive layer secured to a second major surface of the film opposite the first major surface, and the infrared-absorptive layer is optionally metallized. The film is shaped into a self-supporting three-dimensional structure, such as fins, and a thermally conductive material is inside the structure and secured to a portion of the antenna, either the front side of the antenna for the non-metallized film or the back side of the antenna for the metallized film.