Thinking about Ideal Loops
antennae have been used from ELF to UHF since the beginning of radiocommunications. At low frequencies, the main problem for loop
antennae is to have enough sensitivity; the antenna being very small respect to the wavelength the collected energy is also small. To increase the output level the loop
may be made resonant, so loosing it%u2019s intrinsic aperiodic characteristics.