Patent ID: 7454178

Claim:
A transmitter module for a high-frequency stage of a wireless communication system having an input impedance Z i and an output impedance Z o , the system having a signal path embodied as transmission path with an input side and an output side, the signal path being disposed between a signal input and a signal output to be connected to an antenna, the transmitter module comprising: a carrier substrate having a top surface, metallization planes, dielectric layers between said metallization planes, and through contacts connecting ones of said metallization planes; a power amplifier being disposed on said top surface of said carrier substrate and in the signal path on the input side thereof, said power amplifier having an output impedance Z PA <Z i ; a low-pass filter disposed in the signal path at the output side, said low-pass filter having an input impedance Z LPi and an output impedance Z LPo , said output impedance Z PA of said power amplifier being Z PA <Z LPi <Z o and said input impedance Z LPi of said low-pass filter being Z LPi <Z LPo ≦Z o ; an impedance converter carrying out an impedance transformation from Z PA to Z LPi and being disposed in the signal path between said power amplifier and said low-pass filter; and at least one of said impedance converter and said low-pass filter having passive components at least partially embodied as at least one of: conductor track sections in at least one of said metallization planes; and conductor track sections and layer regions of said dielectric layer disposed between said conductor track sections.