Patent ID: 8054239
Filing Date: 2011-11-08
Classification: B32B,H01Q

Abstract:
1. A radome comprising: a ballistic-resistant layer that is configured to extend over an opening of an antenna, the ballistic-resistant layer made of a ceramic material comprising aluminum-oxide and having a dielectric constant greater than six; a rigid layer disposed adjacent to the ballistic-resistant layer, the rigid layer comprising a honeycomb base material having a plurality of holes that extend transversely to the surface of the ballistic-resistant layer, the plurality of holes being filled with a syntactic foam material with a dielectric constant that is less than three; a first backing layer disposed adjacent to the ballistic-resistant layer opposite the rigid layer and opposite the antenna, the first backing layer and the ballistic-resistant layer together having a tensile strength in an amount greater than that of the ballistic-resistant layer alone; an intermediate layer disposed between the ballistic-resistant layer and the rigid layer; and a second backing layer disposed adjacent to the rigid layer opposite the ballistic-resistant layer, wherein the first backing layer, intermediate layer, and the second backing layer are each made of a material having a dielectric constant that is lower than the dielectric constant of the ballistic-resistant layer, wherein the second backing layer is made of cyanate ester or quartz.