Russian scientists have proposed a new method that accelerates and reduces the cost of creating ultra-high-frequency acoustic filters necessary for 6G communication networks. Developed by experts from the National Research University (HSE University) and the P.N. Lebedev Physical Institute, this technology will improve signal quality in smartphones and other devices. This is reported by Ixbt.com .
Filters in modern devices convert electromagnetic signals into ultrasound and vice versa. However, when operating frequencies exceed several gigahertz, the quality of the bond between the film and the substrate can decrease. Previously, this problem was only identified after assembling a finished prototype, leading to significant losses of time and money.
In the new method, scientists were able to 'photograph' sound waves using laser pulses. The first pulse excites an acoustic wave, while the second records its movement along the surface. Based on the data obtained, researchers were able to accurately measure the vertical and transverse stiffness of the interlayer bonding.
This technology allows for checking the suitability of materials without damaging them before the production process. This will greatly assist engineers in designing more reliable components for 5G and 6G networks and in fine-tuning production technology.
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