Single port wide band impedance matching circuit with narrow band harmonic bypass, wireless communication device, and method for providing antenna matching

1. A wide band impedance matching circuit comprising:

a single signal port adapted for receiving a wide band signal;

an impedance matching circuit including a narrow band harmonic bypass, the narrow band harmonic bypass being configured to produce a short at a predetermined frequency, which corresponds to a harmonic of a lower frequency signal included as part of the wide band signal received at the single signal port; and

an antenna port coupled to the single signal port via the impedance matching circuit.

2. A wide band impedance matching circuit in accordance with claim 1 , wherein the impedance matching circuit includes a tunable antenna matching capacitance, and the narrow band harmonic bypass includes a series impedance in parallel with the tunable antenna matching capacitance of the impedance matching circuit.

3. A wide band impedance matching circuit in accordance with claim 2 , wherein the series impedance of the narrow band harmonic bypass is tunable.

4. A wide band impedance matching circuit in accordance with claim 3 , wherein the tunable series impedance of the narrow band harmonic bypass includes a tunable series capacitor.

5. A wide band impedance matching circuit in accordance with claim 4 , wherein the tunable series impedance of the narrow band harmonic bypass additionally includes a secondary trap comprising a combination of an inductor coupled in parallel with a capacitor, where the combination is coupled in series with the tunable series capacitor.

6. A wide band impedance matching circuit in accordance with claim 1 , wherein the single signal port is coupled to one or more transceivers.

7. A wide band impedance matching circuit in accordance with claim 6 , wherein the single signal port is coupled to one or more transceivers via a front end circuit including a diplexing circuit.

8. A wide band impedance matching circuit in accordance with claim 7 , wherein the diplexing circuit includes one or more diplexers for merging signals from the one or more transceivers with the single signal port.

9. A wide band impedance matching circuit in accordance with claim 6 , wherein the one or more transceivers are associated with one or more signals having frequencies which span a predetermined wide signal band.

10. A wide band impedance matching circuit in accordance with claim 1 , wherein the wide band signal includes at least a lower band signal and a higher band signal.

11. A wide band impedance matching circuit in accordance with claim 10 , wherein the lower band signal and the higher band signal, together, support carrier aggregation.

12. A wide band impedance matching circuit in accordance with claim 1 , which is incorporated as part of a wireless communication device.

13. A wide band impedance matching circuit in accordance with claim 12 , wherein the wireless communication device is a radio frequency cellular telephone.

14. A wide band impedance matching circuit in accordance with claim 1 , wherein the wide band signal includes an ultra low band signal, a low band signal, a mid band signal, and a high band signal.

15. A wireless communication device comprising:

one or more transceivers;

a single signal port coupled to the one or more transceivers, the single signal port including a wide band signal;

an impedance matching circuit including a narrow band harmonic bypass, the narrow band harmonic bypass being configured to produce a short at a predetermined frequency, which corresponds to a harmonic of a lower frequency signal included as part of the wide band signal received at the single signal port;

an antenna port coupled to the single signal port via the impedance matching circuit; and

an antenna coupled to the antenna port.

16. A method for providing antenna matching, the method comprising:

coupling a single signal port including a wide band signal to an antenna port via an impedance matching circuit; and

bypassing in the wide band signal at the single signal port, a narrow band harmonic of one of the signal frequencies contained in the wide band signal using a narrow band harmonic bypass which is configured to produce a short at a predetermined frequency, which corresponds to the narrow band harmonic of a lower frequency signal included as part of the wide band signal received at the single signal port.

17. A method in accordance with claim 16 , wherein bypassing in the wide band signal a narrow band harmonic includes tuning the particular frequency at which the narrow band harmonic is bypassed.

18. A method in accordance with claim 17 , wherein tuning the particular frequency includes controlling the value of a series capacitor.