Patent ID: 8208867

Claim:
A portable electronic device, comprising: an antenna structure having a first antenna and a second antenna; an antenna diversity switch that selectively switches the first and second antennas into use in response to antenna diversity control signals; radio-frequency transceiver circuitry that transmits and receives radio-frequency signals through the antenna diversity switch, wherein the radio-frequency signals include radio-frequency signals in a first communications band and radio-frequency signals in a second communications band; a diplexer coupled between the antenna structure and the radio-frequency transceiver circuitry, wherein the diplexer has terminals respectively connected to: a first path that conveys the radio-frequency signals in the first communications band; a second path that conveys the radio-frequency signals in the second communications band; and an antenna path coupled to the antenna diversity switch; an output amplifier in the second path that is interposed between the radio-frequency transceiver circuitry and the diplexer; and a two-position switch interposed in the second path and a three-position switch interposed in the first path.