60GHz 45nm PA for Linear OFDM Signal with Predistortion Correction achieving 6.1 PAE and -28dB EVM

摘要

A 45nm CMOS 60GHz PA optimized for linear modulation with 6dbm saturated power and 13dB gain is presented when biased at 70μA/μm. A maximum power added efficiency (PAE) of 19.4% 8dBm Psat and 18dB gain is achieved for 200μA/μm bias point. The PA was tested using a predistortion algorithm and OFDM packets, and achieved PAE of 6.1% with -28dB EVM and 9% with -20dB EVM at output powers of -2dBm and +1dBm respectively. To our knowledge this is the first publication of a 45nm PA design analyzing the tradeoff between EVM and PAE at the 60GHz frequency range and using predistortion algorithms to boost efficiency and power.