Apparatus for reducing a magnetic coupling between a first electronic circuit and a second electronic circuit

1. An apparatus for reducing a magnetic coupling between a first electronic circuit and a second electronic circuit, comprising:

a conductor loop enclosing the first electronic circuit or the second electronic circuit; and

a tuning element coupled to the conductor loop,

wherein the conductor loop and the tuning element form a resonant circuit, and 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.

2. The apparatus of claim 1 , wherein the resonance frequency is substantially equal to the frequency of the signal processed by the second electronic circuit.

3. The apparatus of claim 1 , wherein the first electronic circuit is configured to process a second signal having a frequency different from the resonance frequency.

4. The apparatus of claim 3 , wherein the resonance frequency is a multiple of the frequency of the second signal.

5. The apparatus of claim 1 , further comprising:

a second conductor loop enclosing the first electronic circuit or the second electronic circuit; and

a second tuning element coupled to the second conductor loop,

wherein the second conductor loop and the second tuning element form a second resonant circuit, and wherein the second tuning element is configured to adjust a resonance frequency of the second resonant circuit to a second frequency related to the frequency of the signal processed by the second electronic circuit.

6. The apparatus of claim 1 , wherein the conductor loop comprises an adjustable inductance.

7. The apparatus of claim 6 , wherein the conductor loop comprises a first winding and a second winding, and wherein the apparatus is configured to connect the first winding and the second winding in series at a first time instant and to connect the first winding and the second winding in parallel at a different second time instant.

8. The apparatus of claim 1 , wherein the tuning element comprises an adjustable capacity.

9. The apparatus of claim 1 , wherein the tuning element comprises an adjustable inductance.

10. The apparatus of claim 1 , wherein the tuning element comprises a capacitive element coupled to ends of the conductor loop.

11. The apparatus of claim 1 , wherein the tuning element comprises a parallel resonant circuit coupled to ends of the conductor loop.

12. The apparatus of claim 11 , wherein the parallel resonant circuit comprises a capacitive element and an inductive element being connected in parallel between a first terminal and a second terminal of the parallel resonant circuit, and wherein the first terminal and the second terminal are coupled to the ends of the conductor loop.

13. The apparatus of claim 1 , wherein the tuning element comprises a plurality of switchable capacitive lines being connected in parallel between ends of the conductor loop, each of the switchable capacitive lines comprising a switching element and a capacitive element connected in series.

14. The apparatus of claim 13 , wherein the number of switchable capacitive lines having a closed switching element is based on the frequency of the signal processed by the second electronic circuit.

15. The apparatus of claim 10 , wherein the capacitive element is a capacitor.

16. The apparatus of claim 12 , wherein the inductive element is an inductance coil.

17. The apparatus of claim 1 , wherein the first electronic circuit is an impedance matching network of a transmit path, or an oscillator.

18. The apparatus of claim 1 , wherein the second electronic circuit is an impedance matching network of a receive path, a power supply network of the receive path, or a digitally controlled oscillator.

19. The apparatus of claim 1 , wherein the signal processed by the second electronic circuit is a radio frequency signal.

20. A die comprising the apparatus according to claim 1 , the first electronic circuit and the second electronic circuit.

21. A transceiver comprising the apparatus according to claim 1 .

22. A mobile communications device comprising the transceiver according to claim 21 .

23. The mobile communications device of claim 22 , further comprising at least one antenna coupled to the transceiver.