A switchable channel-pass filter may be used on the receiver path of a
multichannel radio system. The channel-pass filter may have several
filter elements that may be switched in and out of the circuit to
narrowly filter the incoming signal outside of the channel spectrum,
which may be significantly narrower than the normal spectrum of the
radio. The switchable channel-pass filter may be downstream from at least
one low noise amplifier and may operate within the intermediate frequency
area of the receiver path. Common applications for the switchable
channel-pass filter may be IEEE 802.11 and IEEE 802.16 radio systems.