Filter banks are typically composed of multiple filters with different frequencies or functions and are widely used in communications, electronic devices, power systems, and testing instruments. Their main purpose is to enable multi-band signal selection, noise suppression, and frequency management.

In wireless communications and base station systems, filter banks can process multiple frequency bands simultaneously, reduce signal interference, and improve communication quality. They are commonly used in 5G base stations, satellite communications, and RF front-end modules.

In consumer electronics and automotive electronics, filter banks help reduce electromagnetic interference (EMI) and ensure stable device operation, such as in smartphones, vehicle radar systems, new energy vehicles, and IoT terminals. In addition, they are widely applied in testing equipment and industrial control systems for signal purification and frequency separation, improving system reliability and accuracy.

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