In a composite multiplexer circuit designed to multiplex plural frequency
bands by interconnecting plural multiplexer circuits in parallel, a
multiplexer circuit for extracting a frequency band of a GPS reception
system includes a matching network including an inductor and a capacitor,
and a surface acoustic wave filter connected in series with the matching
network. The multiplexer circuit for the GPS reception system can be so
set as to have infinite impedances at the other frequency bands than the
frequency band thereof. This prevents signals in the other frequency
bands from leaking into the multiplexer circuit for the GPS reception
system.