A front end radio architecture (FERA) is disclosed that includes a transmitter block coupled to a power amplifier (PA) via first and second input terminals. A first split-band duplexer is coupled to a first output terminal of the PA and a second split-band duplexer is coupled to a second output terminal of the PA. The PA includes a first amplifier cell and a second amplifier cell that when coupled to the first and second split-band duplexers makes up first and second transmitter chains. Only one of the first and the second transmitter chains is active when a first carrier and a second carrier have a frequency offset that is less than an associated half duplex frequency within a same split-band duplex band, thus preventing third order inter-modulation (IMD) products from falling within an associated receive channel. Otherwise, the first and the second transmitter chains are both active.