Patent ID: 7443269

Claim:
An apparatus for selectively blocking radio frequency (RF) signals, the apparatus comprising a first switching state and a second switching state, the apparatus further comprising: an input; an output; a film bulk acoustic resonator (FBAR) device located between the input and the output, the FBAR device having a capacitance, wherein when the apparatus is in the first switching state, the FBAR device causes a first RF signal of a first frequency to be blocked from passing from the input to the output and allows a second RF signal of a second frequency to pass from the input to the output; and a capacitive element having a capacitance, wherein when the apparatus is in the second switching state, the capacitance of the capacitive element adds to the capacitance of the FBAR device causing the second RF signal of the second frequency to be blocked from passing from the input to the output and allowing the first RF signal of the first frequency to pass from the input to the output.