Background and description
Nowadays, anechoic chambers for electromagnetic waves (e.g., radio), regardless of their size, are coated with bulky, fragile, and environmentally harmful 3D materials. Often pyramid-shaped, these coatings occupy a considerable space within the chamber, imposing large casings, even for small antennas. The tips of these 3D coatings are fragile and break very easily, seriously affecting its performance and increasing maintenance costs. Moreover, these coatings contain carbon black in their composition, a material that poses environmental and health hazards.
The present technology is characterized by a revolutionary ultrathin 2D metamaterial absorber (sub-wavelength), able to effectively absorb electromagnetic waves ranging from 700 MHz to 18 GHz. This new anechoic coating absorber occupies incomparably less volume than the traditional 3D materials, without compromising efficiency. This promotes portability and usability, as chambers can be significantly smaller and lighter. Additionally, the 2D structure is much sturdier than the 3D ones, reducing costs and performance issues. The production cost for this new absorber is also considerably lower compared to tradition 3D absorbers. This new technology is particularly relevant to industries than need to test small antennas.
