Do shorted-stub lightning protectors work at all frequencies?

Shorted-stub lightning protectors are specifically designed to work effectively at a tuned frequency band. The operation of these devices relies on the principles of resonance and impedance matching, which means they are crafted to function optimally within certain frequency ranges. At frequencies outside of this tuned band, their effectiveness significantly diminishes because they are not able to provide the necessary impedance transformation or effective isolation.

This bandwidth limitation is due to the nature of the stub itself; it acts as a resonant circuit that is tuned to a specific frequency. While it may offer some level of protection at other frequencies, it is not reliable or efficient compared to its performance at the designed frequency. Therefore, while shorted-stub lightning protectors can provide some degree of protection, their primary effectiveness is confined to the tuned frequency band, making this the accurate choice in the context of how these devices operate.