A branching filter package has a SAW filter chip housing area which houses a piezo electric base, on which a transmitting SAW filter and a receiving SAW filter having a different frequency passing band with each other, are formed, and an impedance matching circuit and a branching circuit for the transmitting SAW filter and the receiving SAW filter. 9% or less of the copper content. The high pass filter is electrically coupled to the receiver detect signal and is configured to block frequencies of the receiver detect signal that are below the noise frequency and pass a filtered receiver detect signal.