An apparatus for reducing a magnetic coupling between a first electronic circuit and a second electronic circuit is provided. The apparatus includes a conductor loop enclosing the first electronic circuit or the second electronic circuit, and a tuning element coupled to the conductor loop. The conductor loop and the tuning element form a resonant circuit, wherein the tuning element is configured to adjust a resonance frequency of the resonant circuit to a frequency related to a frequency of a signal processed by the second electronic circuit.