Abstract: The present invention provides for a heretofore unknown radome construction which utilizes core materials heretofore unrealized in radome construction. These core materials include a class of microcellular foams and polycarbonate honeycomb. In one embodiment, the polycarbonate honeycomb is configured with a circular shaped primary cell structure. In another embodiment, the radome is fashioned as a hybrid core configuration consisting of an impact resisting core material and a conventional core material. In another embodiment, the impact resisting core is positioned at the forward nose section of the radome while the conventional core material is positioned in the aft section of the radome.

Abstract: A structure, preferably a radome (1) which comprises a honeycomb (11) of ceramic cloth in the form of fused woven fibers bonded with a matrix to provide a ceramic fiber composite. The fibers are quartz and the matrix is a silica matrix. A cloth (13) is impregated with polysiloxane so that the cloth is 65% by weight quartz and 35% by weight polysiloxane. One or more layers of the quartz cloth (13) are disposed over both open ends of the honeycomb, the total thickness of the layers on each side of the honeycomb being 0.06 inches. A layer of a paint (15) of polysiloxane containing titanium dioxide is optionally placed over the outermost layer of the resin impregnated quartz cloth. The radome is fabricated by initially providing the honeycomb, placing the resin-impregnated cloth thereover and then heating so that some of the resin penetrates into the honeycomb and some of the resin also pyrolyzes to form holes in the resin-impregnated cloth layers.

Abstract: A device and method of making the device for regulating electromagnetic radiations in a predetermined frequency range, which comprises a substrate and a coating mixture on a surface of the substrate. The coating mixture is provided by mixing together: (a) a plurality of flakes of a magnetic or ferrite material having substantial length and width dimensions relative to their thickness, the thickness of substantially all of the flakes being less than the skin depth of all frequencies in the predetermined frequency range, (b) at least one surfactant, (c)) a vaporizable electrically insulating material and (d) a solvent. The mixture is sprayed onto the surface of the substrate, either with or without a magnetic field at the surface, and the solvent is removed to retain the flakes on the substrate spaced from each other by the electrically insulating material and disposed substantially parallel to the portion of the plane of the surface thereunder.

Abstract: A structure, preferably a radome (1) which comprises a honeycomb (11) of ceramic cloth in the form of fused woven fibers bonded with a matrix to provide a ceramic fiber composite. The fibers are quartz and the matrix is a silica matrix. A cloth (13) is impregated with polysiloxane so that the cloth is 65% by weight quartz and 35% by weight polysiloxane. One or more layers of the quartz cloth (13) are disposed over both open ends of the honeycomb, the total thickness of the layers on each side of the honeycomb being 0.06 inches or less. A layer of a paint (15) of polysiloxane with or without specified filler is optionally placed over the outermost layer of the resin impregnated quartz cloth. The radome is fabricated by initially providing the honeycomb, placing the resin-impregnated cloth thereover and then heating so that some of the resin penetrates into the honeycomb and some of the resin also pyrolyzes to form holes in the resin-impregnated cloth layers.

Abstract: First and second electronic devices interconnected by a nonconductive nanoporous film, the film having metal-filled pores extending through the thickness of the film, such that each of the devices is contacted by the metal in at least several pores, the film having other pores that remain unfilled, in order to enhance the compressibility of the film.

Abstract: First and second electronic parts interconnected by a nonconductive nanoporous film, said film having metal-filled pores extending through the thickness of the film, such that each of said devices is contacted by the metal in at least several pores, wherein said film comprises liquid crystal or rigid rod polymer films.

Abstract: A structure, preferably a radome (1) which comprises a honeycomb (11) of ceramic cloth in the form of fused woven fibers bonded with a matrix to provide a ceramic fiber composite. The fibers are quartz and the matrix is a silica matrix. A cloth (13) is impregated with polysiloxane so that the cloth is 65% by weight quartz and 35% by weight polysiloxane. One or more layers of the quartz cloth (13) are disposed over both open ends of the honeycomb, the total thickness of the layers on each side of the honeycomb being 0.06 inches. A layer of a paint (15) of polysiloxane containing titanium dioxide is optionally placed over the outermost layer of the resin impregnated quartz cloth. The radome is fabricated by initially providing the honeycomb, placing the resin-impregnated cloth thereover and then heating so that some of the resin penetrates into the honeycomb and some of the resin also pyrolyzes to form holes in the resin-impregnated cloth layers.

Abstract: An absorber for a microwave module and method of fabrication thereof wherein an ink is provided from a mixture of powdered iron and a resin. The ink is then screen printed or mask printed onto the interior surface of the lid of the microwave module in a predetermined pattern to lower the Q of the cavities within the module. The lowered Q suppresses the electromagnetic resonance and thereby minimizes the EMI problems. Furthermore, the absorber material reduces EMI between sections of the module at frequencies where no cavity resonances occur.

Abstract: An absorber for a microwave module and method of fabrication thereof wherein an ink is provided from a mixture of powdered iron and a resin. The ink is then screen printed or mask printed onto the interior surface of the lid of the microwave module in a predetermined pattern to lower the Q of the cavities within the module. The lowered Q suppresses the electromagnetic resonance and thereby minimizes the EMI problems. Furthermore, the absorber material reduces EMI between sections of the module at frequencies where no cavity resonances occur.

Abstract: Disclosed is a wire grid for tuning a radome or irdome to pass microwave frequency energy while not interfering with the passage of lower radio frequencies such as those used for communications. The wire grid is embedded in the dome material and comprises a plurality of small closely packed wire loops. The close packing of the wire loops provides capacitive coupling between adjacent loops. At microwave frequencies the capacitive coupling between loops makes the pattern equivalent to the prior art continuous wire grid pattern and enhances transmission of a band of microwave frequencies. At low radio frequencies the capacitive coupling between loops is insignificant and the low frequency signals pass through the dome with no reflection. Intermediate frequency signals are attenuated by the wire grid.