Explanation
The filter allows signals of some frequencies to pass smoothly, while signals of other frequencies are greatly suppressed. Therefore, it is essentially a frequency selection circuit superconciucting wave-filter, which is a filter with high-temperature superconducting filter amplifier as its core element. At present, it is mainly made of high-temperature superconducting film materials.
Classification
Special functional materials -> Superconducting materials -> Superconducting parameters