Patent ID: 7180467

Claim:
A dual-band antenna system for wireless communication of signals in a plurality of communication bands, the system comprising: an antenna having an interface port with a frequency-dependent impedance; and, a dual-band matching circuit including an output port connected to the antenna interface port, the dual-band matching circuit comprising: a first tuning circuit selectively tunable within a first communication band of the plurality of communication bands and selectively tunable within a third communication band of the plurality of communication bands, the first tuning circuit comprising a first tunable ferroeclectric (FE) capacitor having a first variable dielectric constant responsive to first control voltage; and a second tuning circuit selectively tunable within a second communication band of the plurality of communication bands when the first tuning circuit is tuned to the first communication band and selectively tunable within a fourth communication band of the plurality of communication bands when the first tuning circuit is tuned to the third communication band, the second tuning circuit comprising a second tunable FE capacitor having a second variable dielectric constant responsive to a second control voltage; wherein the first tuning circuit and the second tuning circuit supply a first conjugate impedance for the first and second communication bands and supply a second conjugate impedance for the third and fourth communication bands.