A 2×2 MIMO multi-band RF transceiver and power amplifier for compact LTE small cell base station

We present a fully integrated 2×2 MIMO CMOS LTE RF transceiver along with multi-band InGaP/GaAs HBT power amplifiers for LTE-A small cell (femtocell) base stations. The transceiver features highly integrated LNAs and drive amplifiers with 24 individual RF I/O pins. The multi-band PAs achieves ACLR <;-45dBc at 25dBm with PAE >38% at 33dBm by employing a third-order intermodulation distortion (IMD3) canceling techniques. The presented SiP composed of proposed radio and PAs shows plenty of margins in radio conformal test of femtocell base station using a commercial modem.