First of all, we understand the design principle of absorbing materials
1) Nano materials, planar hexagonal ferrite, amorphous magnetic fiber, granular film and other high-performance absorbers are used as absorption medium;
2) Using the new absorption principle, electromagnetic resonance and eddy current loss, the microwave absorbing materials are thin in thickness, light in weight, wide in absorption band and high in absorption rate;
3) According to Maxwell equation and genetic algorithm GA, the Simulation CAD of electromagnetic wave absorbing material is realized, which can give full play to the characteristics of absorbing medium and shorten the development period of materials, which can meet the special needs of users.
Is the thicker the absorbing material, the better?
For the absorbing material, the thicker the material is, the more the absorption peak moves to the lower frequency. For the same type of single-layer absorbing material, according to the calculation of reflectivity, the thicker the thickness is, the narrower the absorption bandwidth is and the larger the peak value is.
Rubber based absorbing materials are discussed as follows
Rubber based absorbing materials can be divided into seven types according to different frequency bands, xjjxbcl-1 (frequency band 1-2ghz), xjjxbcl-2 (frequency band 2-4ghz), xjjxbcl-3 (frequency band 4-8ghz), xjjxbcl-4 (band 8-12ghz), xjjxbcl-5 (12-18ghz), xjjxbcl-6 (26.5-40ghz), xjjxbcl-7 (8-18GHz). The thickness of products in different frequency bands is different.
The thickness of the product is 2.5mm for 1-2ghz, 2.0mm for 2-4ghz, 1.5mm for 4-8ghz, 1.0mm for 8-12ghz, 0.8mm for 12-18ghz, 0.5mm for 26.5-40ghz and 1.0mm for 8-18GHz. For specific information, please refer to the introduction of rubber based absorbing materials.
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