FIG. 1 is a schematic diagram of a mobile device 70 according to one embodiment. The mobile device 70 includes a primary antenna 1, a diversity antenna 2, a primary antenna tuning circuit 3, a diversity antenna tuning circuit 4, a double-pole double-throw (DPDT) antenna diversity switch 5, a primary front end module 6, a diversity front end module 7, a battery 8, an MLS envelope tracker 9, a transceiver 10, a baseband modem 11, and an application processor 12.

Although one embodiment of a mobile device is shown, the teachings herein are applicable to mobile devices implemented in a wide variety of ways. Accordingly, other implementations are possible.

In the illustrated embodiment, the primary front end module 6 includes a first power amplifier 21, a second power amplifier 22, a third power amplifier 23, a fourth power amplifier 24, a first low noise amplifier 31, a second low noise amplifier 32, a third low noise amplifier 33, a diplexer 42, a transmit/receive band switch 41, a transmit filter 43, a first duplexer 45, a second duplexer 46, a third duplexer 47, a first receive filter 51, a second receive filter 52, a third receive filter 53, a first directional coupler 59, and a second directional coupler 60. Additionally, the diversity front end module 7 includes a first low noise amplifier 35, a second low noise amplifier 36, a first receive filter 55, a second receive filter 56, a first receive band selection switch 61, and a second receive band selection switch 62.