1. Introduction
Foam core structure absorbing material is an absorbing material with a lightweight, low-density foam layer as a sandwich structure. It not only reduces the overall mass of the material, but also has the function of adjusting the surface impedance, thus broadening the effective absorption bandwidth of the material. At the same time, the foam core structure can also be combined with other sandwich structures to further improve the material's wave-absorbing performance.
2. Point of view analysis
(1)Lightweight characteristics of foam core structure:
The sandwich layer of foam core structure absorbing material is made of lightweight, low-density foam material, so it has the characteristics of light weight. This feature allows the material to exhibit higher flexibility and efficiency in absorbing waves, and can achieve effective absorption in multiple frequency ranges.
(2) Broadband absorption capacity of foam core structure:
Since the foam layer can adjust the surface impedance of the material, the effective bandwidth of the material is increased. This tuning property allows the material to achieve effective absorption in every frequency range. For example, the sandwich structure microwave-absorbing composite material prepared by the Advanced Institute of Science and Technology operates at 6.5~17.5 GHz.
The effective absorption is less than -10 dB within the range, further verifying the broadband absorption capability of the foam core structure.
3. Application prospects
(1) Application in communication field:
Foam core structure absorbing materials can reduce the reflection and scattering of electromagnetic waves and improve the quality of communication signals in the field of communications. By using absorbing materials in communication equipment and facilities, interference and attenuation of wireless signals can be effectively reduced, and communication quality and
stability.
(2) Application in the field of drones:
UAVs will be interfered by radar, satellite navigation, communication and other signals during navigation. The use of foam core structure absorbing materials can reduce the radar reflection cross-section of UAVs, reduce the probability of signal detection, improve the stealth performance of UAVs, and increase combat success.
