An antenna mismatch immuned CMOS power amplifier

A 2.4 GHz reconfigurable CMOS power amplifier to minimize antenna mismatch effects is presented. The PA is implemented by using a 0.18-μm RF CMOS process, and the supply voltage is 3.3 V. The proposed PA is compared to a conventional PA with a fixed matching network. By utilizing the proposed reconfigurable matching network, both the efficiency and the output power are improved under an antenna mismatch condition while satisfying the linearity specifications. For example, the maximum linear power and PAE are increased from 11.1-dBm to 16.1-dBm and from 8.1% to 19% at a Γ=0.3<;45 condition, respectively. To our knowledge, this is the first fully-integrated CMOS PA with a reconfigurable matching network that improves the robustness to the antenna mismatch.