In the production workshop of NBJF Electronic Materials Technology Co., Ltd., NBJF’s CTO Technical Director Dr. Tan Guoguo introduced the silicone absorbing patch just produced to us:
"Electromagnetic waves are everywhere around us." Tan Guoguo said, when the mobile phone has no signal, she is distressed that she can't find the electromagnetic waves; when she turns on the microwave oven, she is worried that the emitted electromagnetic waves are too strong. In the field of electromagnetic wave applications, the enhancement and weakening of electromagnetic waves are inseparable "enemy".
The transmission of electromagnetic waves is bound to be accompanied by crosstalk between electromagnetic waves and the surrounding environment. The stronger the signal, the greater the interference. "Therefore, how to eliminate the interference of electromagnetic waves has become an important issue in the field of electromagnetic wave applications." Tan Guoguo said that electromagnetic wave isolation is mainly achieved through absorbing materials, which is one of the important industrialization directions of NBJF.
At present, advanced communication technology represented by 5G communication technology has expanded the communication frequency band from 700MHz to 6GHz and even millimeter waves. "This means an increase in operating frequency. In terms of signal transmitters, the 4G base station space is like a large suitcase, and the 5G base station space is compressed to a small suitcase, and the interference between electromagnetic signals is enhanced." Tan Guoguo said, in addition, mobile phones The signal receiving end needs to add a new antenna to further reduce the design space of the receiving end, and the interference between electromagnetic signals is further enhanced. With the emergence of these practical applications, while the absorbing material is required to be thinner, it is also desired to have a wider absorption band.
"After technical research, the thickness of the silicone absorbing patch produced by NBJF can be less than 1 mm. Less than 1 mm represents more application space with market potential. By adjusting to different thicknesses required by the application". Tan Guoguo said that the absorbing materials developed and produced by NBJF have been successfully applied to Huawei's 5G base station construction and mobile phone manufacturing fields, and are favored by the market.
NBJF focuses on the two major industry difficulties of electromagnetic compatibility and heat dissipation of absorbing materials. As a scientific and technological enterprise integrating research and development, production and sales of new electromagnetic functional materials, NBJF has successively developed thin, light, wide and strong heat-conducting and high-temperature absorbing materials with the help of Ningbo Institute of Materials of the Chinese Academy of Sciences. product. These products have achieved industrialization and import substitution.
"Especially the produced silicone wave absorbing patch, which has the characteristics of thin layer, high efficiency, wide frequency, low frequency, structural integration and functional composite." Tan Guoguo said, let the products become communication antennas, consumer electronics, wireless charging and radar An important choice for wave absorbing materials in civil fields such as wave stealth.
For civilian products such as mobile phones and computers, due to the inadequate heat dissipation of components when working, there are many cases of overheating and burning. "With the excellent thermal conductivity and other properties of the products, the absorbing materials produced have been successively applied to products with high market demand such as routers, wireless headsets, set-top boxes and chip optical modules.
At present, NBJF has more than 30 downstream partners such as Huawei, and its heat-conducting, high-temperature-resistant and other absorbing materials are sold in units of area.