Passive Cooling System

Abstract

Passive electromagnetic cooling is achieved using a first enclosed chamber having an antenna array surface, and a second chamber comprising open space external to the first enclosed chamber, wherein the open space comprises the sky. An interface is defined between the first chamber and the second chamber, wherein the antenna array surface is positioned with respect to the first chamber to thermally insulate between the interior of the first chamber and the open space of the second chamber. The antenna array surface is configured to direct beams from the interior of the first chamber towards the zenith of the sky. Solar irradiation in the optical spectrum range is reflected in the pyramidal dielectric surfaces or the ground plane in the dielectric rod array antenna.

1 . A system for passive electromagnetic cooling, the system comprising:
 a first enclosed chamber having an antenna array surface;   a second chamber comprising open space external with respect to the first enclosed chamber, wherein the open space comprises the sky;   an interface defined between the first chamber and the second chamber;   wherein the antenna array surface is positioned with respect to the first chamber to thermally insulate between the interior of the first chamber and the open space of the second chamber; and   wherein the antenna array surface is configured to direct beams from the interior of the first chamber towards the zenith of the sky.   
     
     
         2 . The system of  claim 1  wherein the antenna array surface is a pyramidal lens array. 
     
     
         3 . The system of  claim 1  wherein the antenna array surface comprises an array having one or more array elements, wherein each array element is a dielectric rod antenna electrically coupled to the surface across the aperture on the ground plane and directed toward the zenith of the sky. 
     
     
         4 . A system for passive electromagnetic cooling, the system comprising:
 a first enclosed chamber having an electrically conductive surface;   a second chamber comprising open space comprising the sky;   an interface defined between the first chamber and the second chamber; and   a dielectric rod antenna electrically coupled to the electrically conductive surface across the aperture and directed toward the zenith of the sky.   
     
     
         5 . A system for passive electromagnetic cooling, the system comprising:
 a first enclosed chamber to be cooled;   a second chamber comprising open space comprising the sky; and   an array of pyramidal dielectric lenses arranged between the first chamber and the second chamber, wherein the lenses are directed toward the zenith of the sky.   
     
     
         6 . A system for passive electromagnetic cooling, the system comprising:
 a first enclosed chamber to be cooled;   a second chamber comprising open space comprising the sky; and   an array of pyramidal dielectric lenses arranged on a top side of the first chamber, wherein the lenses are directed toward the zenith of the sky and are painted with reflective material such as white colored paint.