” Direct melt fiberglass furnaces ” is a relatively advanced material technology of radome in the world, it has the characteristics of simplicity, energy saving and high efficiency. The direct melt process is to crush the raw materials, screen them into qualified powders, mix them into batch materials, and then put the batch materials into the melting furnace to melt into molten glass. The molten glass flows out of multiple rows of porous platinum plates to form fibers.
Glass fiber reinforced resin matrix composite is a material of radome，it is applied to various radome。And the frequency band is mainly 10GHz。For the high frequency band（10GHz~20GHz），it needs to be selected Quartz fibers with good dielectric properties are used as reinforcing materials. Quartz fiber cloth is used as the reinforcing material, and epoxy resin is used as the matrix to make composite materials, which are the most commonly used materials for radomes.
Quartz fiber with SiO2 content greater than 99.9% and filament diameters of 1-15 microns are called quartz fibers. Its heat resistance is extremely strong, it can be used at 1050℃ for a long time, and its instantaneous high temperature resistance can reach 1700℃. Its temperature resistance is second only to carbon fiber, and it has excellent insulation and dielectric properties. Quartz fiber is widely used in the material of the actual radome, such as the first-generation F-15 in the United States.
