<p>An Inverted-F antenna (IFA) includes a tunable parallel LC resonator physically inserted between two antenna bodies of the IFA structure. The LC resonator is comprised of a tunable capacitor C1 connected in parallel with a combination of a DC blocking capacitor C2 and an inductor L1 connected in series to each other. A DC bias voltage is applied to the tunable capacitor C1 through a DC bias resistor R1, in order to adjust the capacitance of the tunable capacitor C1. The IFA exhibits dual band characteristics, and its resonant frequencies and bandwidths may be turned by adjusting the capacitance of the tunable capacitor C1. The tunable capacitor C1 may be a BST capacitor.</p>
