World Band Radio Frequency Front End Module, System And Method Thereof

An integrated module for use in a radio frequency (RF) front end system comprising:

• a first broadband power amplifier configured for saturated operation and capable of amplifying an RF signal in the 2G bands;
• said first broadband power amplifier connected to a first switch module, said first switch module containing at least one switch which is selectively operable to couple the RF signal to one of a plurality of transmission paths, each of said transmission paths configured to transmit a different frequency band;
• a second broadband power amplifier configured for linear operation and capable of amplifying an RF signal in the 3G and standard bands;
• and
• said second broadband connected to a second switch module, said second switch module containing at least one switch which is selectively operable to couple the RF signal to one of a plurality of transmission paths, each of said transmission paths configured to transmit a different frequency band.

An integrated module for use in a radio frequency (RF) front end system comprising:

• a broadband power amplifier configured to receive and amplify an RF signal in the 2G, 3G and 4G bands;
• said broadband power amplifier coupled to a first switch module, said first switch module containing at least one switch which is selectively operable to couple the RF signal to one of a plurality of transmission paths, each of said transmission paths configured to transmit a different frequency band;
• an RF power sensing circuit connected to the output of the broadband power amplifier and configured to control a power supply to the broadband power amplifier for biasing depending on the power amplifier output power level;
• and
• a mode control capable of switching the power amplifier between linear and saturated operation.

A radio frequency (RF) front end system comprising:

• a single module comprising:
• at least one broadband power amplifier configured to receive and amplify an RF signal;
• and a first switch module connected to said at least one broadband power amplifier, said switch module containing at least one switch which is selectively operable to couple the RF signal to one of a plurality of transmission paths, each of said transmission paths configured to transmit a different frequency band;
• and
• said plurality of transmission paths coupled to a second switch module which is external to the single module, said second switch module outputting the RF signal.