Wireless device

1. A wireless multi-band device comprising:

a radiating system configured to operate in at least two, non-contiguous frequency regions, the radiating system comprising:

a ground plane layer;

a boosting element coupled to the ground plane layer and having a largest dimension less that ⅙ th of a longest operating wavelength in the two frequency regions; and

a radiofrequency system comprising a matching network to adjust an impedance of the radiating system to increase impedance matching of the radiating system in the two frequency regions, the radiofrequency system including: first and second inductors connected in series, the first inductor being connected to the boosting element and the second inductor being connected to an input or output of the radiofrequency system; and a tunable capacitor connected in parallel with the second inductor, wherein the radiofrequency system includes at most five components.

2. The wireless multi-band device of claim 1 , wherein the first and second inductors are passive reactive elements.

3. The wireless multi-band device of claim 1 , wherein the radiofrequency system consists of the first and second inductors and the tunable capacitor.

4. The wireless multi-band device of claim 1 , wherein the wireless multi-band device is programmed to self-tune.

5. The wireless multi-band device of claim 1 , wherein the wireless multi-band device does not have a separate antenna element in addition to the ground plane layer.

6. The wireless multi-band device of claim 1 , wherein the boosting element is smaller than 1/30 times the free-space wavelength corresponding to a lowest frequency of a lowest frequency band in which the multi-band device is configured to operate.

7. The wireless multi-band device of claim 1 , further comprising a control mechanism to control the tunable reactive element, wherein the control mechanism is configured to tune the tunable reactive element such that the wireless device operates in an intended frequency band.

8. The wireless multi-band device of claim 1 , wherein the radiofrequency system includes at most three components.

9. A wireless multi-band device comprising:

a radiating system configured to operate in at least two, non-contiguous frequency regions, the radiating system comprising:

a ground plane layer;

a boosting element coupled to the ground plane layer and having a largest dimension less that ⅙ th of a longest operating wavelength in the two frequency regions; and

a radiofrequency system comprising a matching network to adjust an impedance of the radiating system to increase impedance matching of the radiating system in the two frequency regions, the radiofrequency system comprising: an inductor connected on one end to the boosting element and on the other end to an input or output of the radiofrequency system; and a tunable capacitor connected in parallel with the inductor, wherein the radiofrequency system includes at most five components.

10. The wireless multi-band device of claim 9 , wherein the inductor is a passive reactive element.

11. The wireless multi-band device of claim 9 , wherein the radiofrequency system consists of the inductor and the tunable capacitor.

12. The wireless multi-band device of claim 9 , wherein the wireless multi-band device is programmed to self-tune.

13. The wireless multi-band device of claim 9 , wherein the wireless multi-band device does not have a separate antenna element in addition to the ground plane layer.

14. The wireless multi-band device of claim 9 , wherein the boosting element is smaller than 1/30 times the free-space wavelength corresponding to a lowest frequency of a lowest frequency band in which the multi-band device is configured to operate.

15. The wireless multi-band device of claim 9 , further comprising a control mechanism to control the tunable reactive element, wherein the control mechanism is configured to tune the tunable reactive element such that the wireless device operates in an intended frequency band.

16. The wireless multi-band device of claim 9 , wherein the radiofrequency system includes at most three components.