Pretty wild that the RF front-ends of some mobile phone base stations used High-Temperature Superconductor as filters. Not cutting edge, but rather old tech back in the GSM era, as they turned out to be completely impractical.
Pretty wild that the RF front-ends of some mobile phone base stations used High-Temperature Superconductor as filters. Not cutting edge, but rather old tech back in the GSM era, as they turned out to be completely impractical.
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