Do practical implementations of LC filters have a limited bandwidth over which they operate? ie. Would they start to attenuate less as the frequency of the input signal get very high (MHz->GHz)?

  • \$\begingroup\$ There is a distance vs wavelength thing to watch out for above a GHz. \$\endgroup\$ – Andy aka Mar 25 at 8:40
  • \$\begingroup\$ There are also parasitics that turn inductors into capacitors, and vice versa. \$\endgroup\$ – a concerned citizen Mar 25 at 11:08

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