A 700 MHz-920 MHz CMOS Power Amplifier for LTE Applications

This work presents a CMOS power amplifier (PA) for FDD (band 17, 18, 19 and 20) of 4G cellular applications. In this work, a power cell by using three stacked transistors is proposed. It not only meets the breakdown voltage requirement, but also provides enough power gain and output power. By designing the compact and low-loss layout of the power cell, the power added efficiency (PAE) is increased observably. It is fabricated in 180-nm CMOS with a chip area of $1800 \ \mu \mathrm{m} \ \times 1500 \mu \mathrm{m}$. The proposed PA achieves a power gain of 37 dB, saturated output power $(\mathbf{P}_{\mathbf{s}\mathbf{a}\mathbf{t}})$ of 32 dBm, output 1 dB compression point $(\mathbf{OP}_{\mathbf{l}\mathbf{d}\mathbf{B}})$ of 30.5 dBm and peak PAE of 41.50/0 at 810 MHz.