received by the International Bureau on 16 November 2015 (16.1 1.2015)

1. An impedance matching circuit for a wireless communication device, comprising: a first node receiving a first impedance;

a second node connected to an antenna having a second impedance;

a first variable capacitor connected between the first node and a third node; a second variable capacitor connected between the third node and a reference potential;

a first inductive element connected in parallel with the second variable capacitor between the third node and the reference potential;

a third variable capacitor and a second inductive element connected in series between the third node and the second node; and

an energy storage device connected between the second node and the reference potential,

wherein the energy storage device comprises:

an inductor including a first end connected to the second node and a second end connected to the reference potential; and

a capacitor including a first end connected to the reference potential and a second end connected to the inductor between the first and second ends of the inductor. 2. The impedance matching circuit of claim 1 further comprising a second energy storage device connected between the first node and the reference potential.

3. The impedance matching circuit of claim 1 further comprising a fourth capacitor connected in series with the third variable capacitor and the second inductive element between the third node and the second node.

4. The impedance matching circuit of claim 1 further comprising a second energy storage device connected in parallel with the first variable capacitor between the first node and the third node.

5. The impedance matching circuit of claim 1 further comprising a fourth variable capacitor including a first end connected to the third node and a second end connected to a first point of an inductor of the second inductive element,

wherein the first point is between first and second ends of the inductor. 6. The impedance matching circuit of claim 5 further comprising a fifth variable capacitor including a first end connected to the third node and a second end connected to a second point of the inductor of the second inductive element,

wherein the second point is between the first and second ends of the inductor, and

wherein the second point is different than the first point.

7. The impedance matching circuit of claim 1 further comprising a fourth variable capacitor including a first end connected to the second node and a second end connected to a first point of an inductor of the second inductive element,

wherein the first point is between first and second ends of the inductor. 8. The impedance matching circuit of claim 7 further comprising a fifth variable capacitor including a first end connected to the second node and a second end connected to a second point of the inductor of the second inductive element,

wherein the second point is between the first and second ends of the inductor, and

wherein the second point is different than the first point.

9. The impedance matching circuit of claim 1 wherein the first, second, and third variable capacitors include switch capacitors.

10. A wireless communication device comprising:

a transceiver that is connected to a first node, that includes a first impedance, and that is configured to operate based on at least one of:

a first frequency band of a Global System for Mobile (GSM) communications standard;

18 a second frequency band of a Long-Term Evolution (LTE) communications standard; and

a third frequency band of a Wideband Code Division Multiple Access (WCDMA) standard;

an antenna that is connected to a second node and that includes a first impedance;

a first switch capacitor connected between the first node and a third node;

a second switch capacitor connected between the third node and a reference potential;

a first inductive element connected in parallel with the second switch capacitor between the third node and the reference potential;

a third switch capacitor, a second inductive element, and a fourth capacitor connected in series between the third node and the second node; and

an energy storage device connected between the second node and the reference potential,

wherein the energy storage device comprises:

an inductor including a first end connected to the second node and a second end connected to the reference potential; and

a capacitor including a first end connected to the reference potential and a second end connected to the inductor between the first and second ends of the inductor.

11. A method for wireless communication comprising:

using a transceiver that is connected to a first node and that includes a first impedance, operating based on at least one of:

a first frequency band of a Global System for Mobile (GSM) communications standard;

a second frequency band of a Long-Term Evolution (LTE) communications standard; and

a third frequency band of a Wideband Code Division Multiple Access (WCDMA) standard;

connecting an antenna that includes a second impedance to a second node;

19 connecting a first switch capacitor between the first node and a third node;

connecting a second switch capacitor between the third node and a reference potential;

connecting a first inductive element in parallel with the second switch capacitor between the third node and the reference potential;

connecting a third switch capacitor, a second inductive element, and a fourth capacitor in series between the third node and the second node; and

connecting an energy storage device between the second node and the reference potential, wherein connecting the energy storage device comprises:

connecting an inductor including a first end connected to the second node and a second end connected to the reference potential; and

connecting a capacitor including a first end connected to the reference potential and a second end connected to the inductor between the first and second ends of the inductor.

12. The method of claim 11 wherein, in response to a change in the second impedance of the antenna, at least one of:

a first capacitance of the first switch capacitor changes;

a second capacitance of the second switch capacitor changes; and

a third capacitance of the third switch capacitor changes.

13. The method of claim 11 further comprising, in response to a change in the second impedance of the antenna, changing at least one of:

a first capacitance of the first switch capacitor;

a second capacitance of the second switch capacitor; and

a third capacitance of the third switch capacitor.

14. The method of claim 11 further comprising:

connecting a second energy storage device between the first node and the reference potential

20

15. The method of claim 11 further comprising:

connecting a second energy storage device in parallel with the first switch capacitor between the first node and the third node.

16. An impedance matching circuit for a wireless communication device, comprising: a first node receiving a first impedance;

a second node connected to an antenna having a second impedance;

a first variable capacitor including a first end directly connected to the first node and including a second end directly connected to a third node;

a second variable capacitor including a first end directly connected to the third node and including a second end directly connected to a reference potential;

a first inductive element connected in parallel with the second variable capacitor, the first inductive element including a first end directly connected to the third node and including a second end directly connected to the reference potential; and

a third variable capacitor and a second inductive element connected in series between the third node and the second node, the third variable capacitor including a first end that is directly connected to the third node and including a second end, the second inductive element including a first end that is directly connected to the second end of the third variable capacitor and including a second end that is connected to the second node.

21