Fiberglass antenna, also known as sheet-like molded plastic, is made of unsaturated polyester resin, glass fiber untwisted coarse yarn, and other composite materials through a specialized SMC molding machine. It is then thickened, cut, and solidified into a metal mold at high temperature and pressure. SMC and its molded products, as an emerging type of fiberglass reinforced plastic, commonly known as fiberglass reinforced plastic, can be processed in several ways, including hand lay up molding, spray molding, extrusion molding, winding molding, resin transfer molding, and compression molding. Fiberglass antenna molded products have the following characteristics: light weight, high strength, good consistency in size and batch quality, and can achieve zero shrinkage rate. At the A-level surface level, with high mechanization and automation, it is suitable for products with high surface quality requirements, large output, and uniform thickness.
SMC, also known as sheet molded plastic, is made from unsaturated polyester resin, glass fiber untwisted coarse yarn, and other composite materials through a specialized SMC molding machine. It is then thickened, cut, and solidified into a metal mold under high temperature and pressure. SMC and its molded products, as an emerging type of fiberglass reinforced plastic, commonly known as fiberglass reinforced plastic, can be processed in several ways, including hand lay up molding, spray molding, extrusion molding, winding molding, resin transfer molding, and compression molding. SMC and its molded products have the following characteristics: light weight, high strength, good consistency in size and batch quality, and products can achieve zero shrinkage rate. At the A-level surface level, with high mechanization and automation, it is suitable for products with high surface quality requirements, large output, and uniform thickness.
High precision, high efficiency, and high gain
The important task of using SMC in antenna manufacturing is to fully leverage its characteristics and meet the high-precision requirements of antenna design and manufacturing processes. When designing the mold size, the material shrinkage rate and the stable SMC molding shrinkage rate have been considered. After molding, the shape of the SMC antenna reflector deviates slightly from the original design parabolic surface, which means that the accuracy of the SMC molded antenna is completely guaranteed by the mold accuracy. The root mean square value of the molded overall reflection surface of the SMC antenna is 0.25mm, and the root mean square value of the single reflection surface of the segmented antenna is less than 0.3mm. After assembly, the root mean square value of the reflection surface is less than 0.6mm.
Corrosion resistance
Traditional antenna materials such as aluminum plates and steel plates are made of metal materials. In terms of acid, alkali, salt, and even corrosion resistance, SMC is particularly suitable as a non-metallic dielectric composite material. The Pikington laboratory in the United States analyzed the surface of SMC materials using infrared radiation and found that the surface was covered with additives, resin, and extremely fine calcium carbonate filler, which had good acid resistance, water resistance, and corrosion resistance. The antenna made of this material solved the problem of traditional metal material antennas being prone to corrosion. In coastal areas, rainy and humid areas, as well as areas with acid rain, the advantages of corrosion of SMC molded antennas are particularly prominent. Bodlin Company in the United States has conducted more stringent anti-corrosion tests. At a high temperature of 50 ℃, the SMC molded antenna samples were placed in 130 highly corrosive chemical environments. The results showed that the test samples had only slight or no changes.
Long lifespan
Generally, aluminum plate antennas can take as little as 2-3 years to 4-6 years in coastal areas, and are usually damaged due to salt spray erosion and aging. An obvious example is cable television (CATV) in Taiwan, which was built earlier than in mainland China. It is estimated that there are nearly 1000 satellite TV receiving antennas on the island, all of which were built in the mid-1980s. They are all aluminum plate antennas, and by the early 1990s, they had begun to be replaced gradually. This time, SMC molded antennas have been used (Huada Company once supplied hundreds of antennas). The service life of SMC molded antennas is generally over 15 years; The SMC molded antennas trial produced by PRODLIN in 1985 still work normally, and they are subject to typhoon and rainstorm every year.
Strong wind resistance
Due to the design of multiple longitudinal and circumferential rib structures on the antenna reflector during the molding process, the SMC antenna can withstand wind loads of up to 45 meters per second based on structural strength calculations, demonstrating its significant structural stiffness and strength.
Reflective layer technology
The reflection surface of the SMC antenna uses a metal aluminum mesh as the reflection layer for electromagnetic waves, and the aluminum mesh in the antenna product is uniformly embedded under the surface SMC, which can reflect electromagnetic waves and isolate the atmosphere, providing good protection.
Easy to transport and install
Due to the use of high-temperature and high-pressure film pressing technology, the material characteristics and processing technology of SMC antennas determine that they have unparalleled consistency compared to other antennas. This not only ensures the accuracy and high gain of the antenna, but also makes it very easy to install and debug. SMC, commonly known as "fiberglass", has the characteristic of being non deformable, which eliminates the adverse effects of antenna deformation on satellite receiving systems during transportation.
