Patent ID: 8447240
Filing Date: 2013-05-21
Classification: H01Q,H04B

Abstract:
1. A tunable antenna that is configured within a mobile device for receiving radio communication signals across multiple frequency bands, the tunable antenna comprising: an antenna element sized to fit within a handheld mobile device and comprising a loop antenna element and a monopole antenna element, the monopole antenna element having a dielectric material disposed therewith configured to reduce a lowest achievable resonant frequency of the antenna element without increasing its size; a tuning component coupled at the antenna element, wherein the tuning component is configured for altering a frequency characteristic of the antenna element and configured so that an electrical property of the tuning component changes by a magnitude as a function of a change in temperature, and configured to tune the antenna element to receive radio frequency signals across both a cellular telephony band and at least one other non-overlapping, relatively low-frequency band; and a temperature compensation component configured so that an electrical property of the temperature compensation component changes by the magnitude in an opposite direction as a function of the change in temperature, the temperature compensation component coupled with the tuning component so that the change in the electrical property of the temperature compensation component compensates for the change in the electrical property of the tuning component.