Efficient front-end module structure and mobile device including the same

A mobile device comprising:

• an antenna configured to receive a radio frequency (RF) signal;
• and
• a front end system configured to communicate with the antenna, the front end system including a plurality of input terminals configured to receive a plurality of RF signals from a transceiver, the RF signals being delivered through a plurality of narrowband carriers, a combiner configured to combine the plurality of RF signals into a combined RF signal in a broadband carrier, a power amplifier configured to amplify the combined RF signal and to generate an amplified RF signal, a filter configured to filter the amplified RF signal and to generate a filtered RF signal, and an output terminal configured to output the filtered RF signal to the antenna.