Design of a 0.7∼1.5 GHz wideband power amplifier in 0.18-μm CMOS process

A power amplifier (PA) for multi-mode multi-standard transceiver which is implemented in a TSMC 0.18μm CMOS process is presented. The proposed PA uses matching compensation, lossy matching network and negative feedback technique to improve bandwidth. Measurement results show that the working frequency range of the broadband PA is 0.7~1.5GHz, with the maximum output power of 18.2~22.3dBm. The output P1dB during test is 16.6~21.4dBm, and the corresponding PAE is 7.7%~23.4%. The power gain within the working frequency is larger than 16dB and the S11 is less than -13dB. According to the test results, the proposed PA can cover the frequency of more than one octave. The linearity and power gain of the PA is satisfactory within the working frequency.