In recent years, with the continuous development and popularization of wireless communication technology, the application scenarios of wireless communication have become increasingly widespread, such as mobile phone communication, wireless data transmission, satellite navigation, Internet of Things, etc. In wireless communication systems, antennas play a crucial role in the performance and reliability of the system as important components for receiving and transmitting wireless signals.

According to China Powder Network, there are three main ways to improve antenna performance: first, optimizing packaging technology, such as multi-layer circuit board packaging technology and semiconductor packaging technology; The second is to optimize the antenna structure, such as slotting, folding, short circuiting branches, and changing the feeding method of traditional antenna structures; The third is to optimize the antenna substrate material, such as using material composites, improving processes, and developing new materials to enhance the performance of antenna substrate materials.
The first two technological means have been fully developed and gradually become bottlenecks, while there is still significant room for improvement in the performance of antenna substrate materials. In addition, as the packaging design and structural optimization of antennas are closely related to substrate materials, the development of excellent substrate materials is a key part of achieving antenna performance optimization.
In May of this year, Huawei Technologies Co., Ltd. and the University of Electronic Science and Technology of China applied for a patent titled "A Magnetic Hybrid Material and Its Preparation Method, Polymer Composite Material, Antenna, and Electronic Equipment". The magnetic hybrid material includes a mixture of magnetic powder and viscosity regulating powder.
According to the patent description, due to its high magnetic permeability and low loss characteristics, ferrite magnetic powder materials have become one of the key basic materials for antenna substrates, high-frequency microwave circuit boards, inductors, filters, and other devices in electronic devices. In related technologies, ferrite magnetic powder materials with high magnetic permeability and low loss characteristics are the key basic materials for antenna substrates. Therefore, in order to achieve low signal transmission loss, ferrite magnetic powder materials are used in antenna materials, which can reduce the physical size of the antenna while avoiding the adverse effects of using high dielectric constant magnetic powder materials on antenna operation, thereby improving integration.
However, the above-mentioned ferrite material adopts a ferrite monazite structure, and the resonance peak position of the ferrite material is controlled by doping, so that the ferrite material is completely sintered into an antenna substrate for use. When sintering the ferrite material into an antenna substrate in practice, the strength of the sintered ferrite material is relatively brittle, making the formed antenna substrate prone to cracking and fragility, resulting in poor mechanical properties of the antenna substrate. The purpose of the above-mentioned patent is to solve the problems of cracking and fragility that are prone to occur due to the use of ferrite magnetic materials.
Specifically, the magnetic hybrid material provided by the patent includes a mixture of magnetic powder and viscosity regulating powder. Among them, the particle size of the viscosity adjusting powder is smaller than that of the magnetic powder, which makes the volume of the magnetic powder in the magnetic mixed material larger, facilitating the improvement of the magnetism of the magnetic mixed material. The viscosity adjusting powder is located between the powder particles of the magnetic powder, playing a lubricating role to enhance the fluidity and plasticity of the magnetic powder and the viscosity adjusting powder after mixing.
The viscosity regulating powder adopts non-metallic minerals, which can effectively regulate the flowability and viscosity of magnetic hybrid materials. After the magnetic hybrid materials are combined with polymer materials, the flowability of the formed polymer composite materials can be adjusted, thereby making the polymer composite materials have strong plasticity.
The non-metallic mineral used for viscosity adjustment can be an oxide powder containing aluminum or silicon, which has the characteristics of low thermal expansion coefficient, good wettability, thermal stability, and insulation. It can adjust the viscosity of magnetic mixed materials and polymer materials after mixing. After mixing the viscosity adjustment powder and magnetic powder into a magnetic mixed material, the thermal expansion coefficient of the magnetic mixed material can be reduced to avoid expansion of the magnetic mixed material during heating; And it helps to improve the wettability of magnetic hybrid materials, making it easier for them to mix evenly with polymer materials; Furthermore, when processing magnetic hybrid materials at high temperatures, magnetic hybrid materials have good thermal stability to avoid reactions and release of gases; Another advantage is that magnetic hybrid materials have good insulation properties, and they maintain their insulation properties when combined with polymer materials.

In short, with the "blessing" of viscosity regulating powder, the flowability and viscosity of magnetic hybrid materials are enhanced, thereby enhancing the mechanical properties of magnetic hybrid materials, ultimately making polymer composite materials easier to process and less prone to cracking and damage when making antenna substrates.

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