Patent ID: 8472908

Claim:
A wireless portable device for radio communication, comprising: at least one antenna element included within the wireless portable device; at least one ground-plane having a length and a width, no ground-plane having a width larger than 55 mm; radio frequency communication circuitry for processing a signal received through the at least one antenna element; at least one matching network operatively arranged between the at least one antenna element and the radio frequency communication circuitry; the device is arranged for communication involving at least, receiving and processing a signal in accordance with a communication system having a bandwidth with a lower frequency limit (f min ) and un upper frequency limit (f max ); the at least one antenna element operates as a non-resonant antenna element for frequencies that are not lower than the lower frequency limit (f min ) and not higher than the higher frequency limit (f max ) so that an imaginary part of an input impedance of the at least one antenna element is not equal to zero for any frequency that is not lower than the lower frequency limit (f min ) and not higher than the higher frequency limit (f max ); and the at least one antenna element is configured so that the imaginary part of the input impedance for any selected frequency not lower than the lower frequency limit (f min ) and not higher than the higher frequency limit (f max ) is closer to zero than the imaginary part of the input impedance for any frequency not lower than the lower frequency limit (f min ) and lower than the selected frequency.