A device having a radio front end is provided. The radio front end
includes an inductor having a first end and a second end. A capacitor
having a first end and a second end is connected to the second end of the
inductor. An antenna is connected to the second end of the inductor and
the second end of the capacitor. A first switch is connected to the first
end of the inductor and the first end of the capacitor, wherein the
inductor and capacitor form a resonant circuit when the first switch is
closed. A second switch is connected to the resonant circuit, the second
switch connecting the resonant circuit to ground through a low impedance
when the first switch is closed. A third switch is connected to a
transmit power amplifier connecting the transmit power amplifier to
ground through a low impedance when the first switch is closed.