A Compact W-band Power Amplifier Employing Lossy Neutralization and Sandwich-Like Transformer Matching Techniques in 55-nm CMOS

In this paper, a compact high gain W-band power amplifier (PA) is proposed. The class A operation mode is carefully chosen and lossy neutralization is investigated for achieving high gain and high output power simultaneously. Sandwich-like transformers are employed to achieve a compact layout while enhancing the power transmission. Measurement results show that it achieves a peak gain of 20 dB and a peak power added efficiency (PAE) of 21.3% at 88 GHz. Meanwhile, the maximum output 1dB compression point (OP1dB) is 7.1 dBm and the saturated power (Psat) is 13 dBm respectively.