Glass fiber reinforced plastic radome is a kind of structure that can protect antenna system from external environment. Radome has good electromagnetic wave penetrating property, and it can endure the bad environment. Outdoor antennas are usually exposed to outdoor work, and are directly attacked by storms, ice and snow, dust and solar radiation in the natural world, resulting in lower antenna accuracy, shorter life and poor working reliability. The use of glass fiber reinforced plastic antenna housing can be insulated, anti-corrosion, lightning protection, anti-interference, durability and other effects, and the wave effect is very good, is the most ideal antenna radome materials.
Wave transparent material is a kind of rapid development in recent years in multi functional dielectric material structure, thermal protection, through the wave in one, is a structural material with minimal dielectric loss, an electromagnetic wave propagation material encountered in the process, if through the strength of more than a certain limit, the material can be regarded as high wave penetrating material. In terms of material properties, it is characterized by a very small dielectric constant and a dielectric loss tangent. Glass fiber material can be used as a variety of aircraft, missiles, spacecraft, satellites and ground stations of the radome and antenna window, also can be used as a high performance printed circuit board substrate, play an important role in the aerospace, electronics, communications and other fields, has a very important economic and social benefits.
There are two kinds of wave transmitting materials, one is inorganic materials, such as alumina, silica, glass ceramics, silicon nitride, boron nitride, etc. the other is heat-resistant resin based fiber composite. Shandong intelligent new materials Co. Ltd., mainly carries on the analysis to wave transparent composites.
Glass fiber reinforced plastic radome, radome used wave transmitting composite material
The wave transmitting composite material belongs to a functional composite material, comprising a base body and an reinforcing body two parts. It is the most widely used glass fiber reinforced resin matrix composite at present.
1, matrix
The wave transmitting composite material is made up of reinforced fiber and resin matrix, and their good electrical properties can form a good wave absorbing material with good electrical properties. Generally, the mechanical and dielectric properties of the reinforced material are better than that of the resin matrix, so the wave transmitting property of the composites mainly depends on the properties of the resin matrix. Therefore, it is necessary to select the resin matrix with excellent electrical properties. At the same time, the resin acts as an adhesive in the composite and is the basic component to determine the heat resistance of the composite.
The resin matrix are mainly traditional unsaturated polyester resin (UP), epoxy resin (EP), modified phenolic resin (PF) as well as in recent years the research and application of cyanate ester resin (CE), silicone resin, bismaleimide resin (BMI), polyimide (P1), polytetrafluoroethylene (PTFE) a new high temperature resistant resin.
2. Reinforcement
At present, most of them are made of glass fiber, and the reinforced materials used in domestic composites are mainly E glass fiber and S glass fiber, and M glass fiber is used less. Kevlar was originally invented by the United States DuPont Co, and Canada has used it for aircraft radar enclosures. Spectra1000 at various frequencies exhibit excellent dielectric properties, and has low density, high strength, high modulus and high impact performance, has great appeal in the manufacturing high performance radome in.
Two 、 glass fiber reinforced plastic radome, main application
It is mainly used in ultra long range precision tracking radar radome with extremely large diameter and radome of highly precise tracking radar,
Guide radar radome, warning radar radome, weather radar radome, thin-wall structure ground radome,
Mobile communication base station, antenna cover, vehicle antenna cover and other fields. Shandong intelligent new materials Co., the user can wave, size and other requirements according to custom processing. At present, we have worked with a number of institutes in China, and our products have met the requirements of various military standards.
Three, the main advantages of glass fiber reinforced plastic radome products:
1, glass fiber reinforced plastic radome will never be deformed, and the geometric dimension will remain stable for a long time.
2, weather resistance: corrosion, UV, anti-aging, shock resistance, in high temperature, low cold and other harsh environment, still good performance, more applicable to a variety of complex environments.
3. The surface of glass fiber reinforced plastic radome is added with additives to enhance the adhesion between them, so that the surface paint will not fall off, wrinkle and maintain color for a long time even in adverse weather conditions.
4 、 good electrical insulation and strong wave permeability.
5, light quality, processing, transportation and installation convenience.
6, the appearance of exquisite, high-grade, good texture.
7, FRP radome has the advantages of long service life (general design life of twenty years), convenient installation and low cost (the proportion is only 1/4 carbon steel, no fire, in the construction of a single length of up to 6 meters, or even longer), convenient cutting and do not need to maintain the advantages of.