An assembly that includes a printed circuit board and a foam dielectric material, and a method of fabricating the assembly is disclosed. The assembly includes at least one layer of a foam dielectric material, which has properties similar to those of air. This layer of foam dielectric material is disposed between a top sublaminate and a bottom sublaminate. The bottom sublaminate may be a traditional printed circuit board, comprising an arbitrary number of layers. The top sublaminate may be a single layer, or may be multiple layers and may include an antenna. The foam dielectric material serves to provide mechanical support for the top sublaminate and the central conductor. The foam dielectric material also provides physical separation between the bottom sublaminate and the antenna.