Electromagnetic wave absorbing materialsIt has a wide range of applications in the field of electromagnetic compatibility of electronic and communication devices. However, with the rise of technologies such as 5G and radar communication, the spectrum of electromagnetic wave applications has expanded from meter waves to millimeter waves, and effectively absorbing a wide frequency range has become an important challenge for the development of absorbing material applications.
At present,
Advanced Institute of TechnologyA certain breakthrough has been made in the research and development of high-frequency rare earth soft magnetic materials. Among them, the rare earth Ce2Fe17N3- δ silicone composite material achieved a maximum absorption of -60.5dB at 9.97GHz, with a bandwidth covering the X-band (8-12 GHz) and a thickness of only 1.7mm. In addition, Fe based amorphous powder electromagnetic wave absorbers also achieved a strong absorption of -60.3dB at 7.08 GHz, with an effective absorption bandwidth of 2.3 GHz. In addition, Co based amorphous thin layer absorbing materials have achieved an effective absorption bandwidth of 3.6 GHz in the X-band. The design innovation of these materials makes it possible to effectively absorb broadband.
Recently, the Advanced Institute of Science and Technology's Soft Magnetic Materials team has designed and prepared broadband multi-layer electromagnetic wave absorbing materials. This material utilizes a composite of carbonyl iron, carbon nanotubes, and Ce2Fe17N3- δ structure to achieve differentiated reflection/transmission effects on electromagnetic waves at different frequencies. By adjusting the thickness of the carbon nanotube layer, effective absorption of 12.6 GHz (5.4-18 GHz) broadband electromagnetic waves was achieved, with a total thickness of only 2.4mm. This research achievement has significant implications for the structural design of absorbing materials.
Before delving into these viewpoints, let's first take a look
Electromagnetic wave absorbing materialsDefinition and function. Electromagnetic wave absorbing materials refer to materials that achieve less or even no reflection of electromagnetic waves by losing electromagnetic energy. It has important applications in the field of electromagnetic compatibility of electronic and communication devices. The main performance indicators of absorbing materials include absorption rate and reflection loss. Absorption rate refers to the ability of absorbing materials to absorb electromagnetic waves, usually requiring a value greater than 90%. Reflection loss refers to the degree of reflection of electromagnetic waves by absorbing materials, usually requiring less than -10dB.
In response to the current challenges in the application and development of absorbing materials, the advanced institute's research and development of high-frequency rare earth soft magnetic materials has achieved remarkable results. For example, the rare earth Ce2Fe17N3- δ silicone composite material achieved a maximum absorption of -60.5dB at 9.97GHz, with a bandwidth covering the X-band (8-12 GHz) and a thickness of only 1.7mm. This result indicates that it has a wide absorption bandwidth and high absorption rate. In addition, Fe based amorphous powder electromagnetic wave absorbers achieved a strong absorption of -60.3dB at 7.08 GHz, with an effective absorption bandwidth of 2.3 GHz. The Co based amorphous thin layer absorbing material achieved an effective absorption bandwidth of 3.6 GHz in the X-band. The successful research of these materials provides new ideas and methods for the application of broadband absorbing materials.
In terms of structural design of absorbing materials, the broadband multi-layer electromagnetic wave absorbing materials developed by Advanced Institute of Science and Technology are of great significance. This material utilizes a composite of carbonyl iron, carbon nanotubes, and Ce2Fe17N3- δ structure to achieve differentiated reflection/transmission effects on electromagnetic waves at different frequencies. By adjusting the thickness of the carbon nanotube layer, effective absorption of 12.6 GHz (5.4-18 GHz) broadband electromagnetic waves was achieved, with a total thickness of only 2.4mm. This design innovation has opened up new directions for the research and application of broadband absorbing materials.
in general,
Broadband absorbing materialIt has important applications in the field of electromagnetic compatibility of electronic and communication devices. The research results of high-frequency rare earth soft magnetic materials and wideband multilayer electromagnetic wave absorbing materials developed by the Advanced Institute of Science and Technology provide new methods and approaches for achieving wideband effective absorption. These achievements not only have breakthrough significance in technology, but also provide new possibilities for the application of absorbing materials. We look forward to these studies further promoting the development and application of broadband absorbing materials.
