How can the output voltage of a multiple-turn receiving loop antenna be increased?

The voltage induced in a magnetic loop antenna by a radio signal is directly proportional to the number of turns of wire, the total area enclosed by the loop, the frequency, and the strength of the magnetic field. By increasing either the number of turns or the physical area of the loop, the antenna captures more magnetic flux. Capturing more magnetic flux directly increases the induced signal voltage at the antenna's output. Distractors such as reducing shield permeability or using high impedance wire for the coupling loop would actually degrade performance or fail to increase the captured energy.