The issue would then be if the most resonant one is not the one you want, that would be a noise you have to filtered. Whilst practicality mean we can’t be optimal due to size, is it a major matter. Can the filter be efficient or make efficient by electronic. At least in 70s when radio listening is peak, the antenna is key to good reception.
if the most resonant one is not the one you want, that would be a noise you have to filtered.
Which is where the tuned-circuits of the radio's front-end come into play. In a sense the locations of the tuned circuits are not especially critical, in that the tuned-circuit filtering can be at the antenna itself, at the radio-frequency amplification front-end stage, or even at the intermediate-frequency amplification stage. In really good radios you would find tuned-circuits in all of those locations to increase the level of wanted signals and the attenuation of unwanted signals.
