Abstract
We present a compact W-band power amplifier (PA) for automotive radar application in 65-nm CMOS technology. The circuit adopts a pseudo-differential push-pull configuration based on transformers (TFs) which offer highly efficient and flexible matching networks with minimized area occupancy. We have set the optimal output resistance close to 50 \Omega , design guidelines in sizing active devices for each stage, and the corresponding transformers were presented for optimal power efficiency based on an analysis of surrounding matching networks. Working under a supply voltage of 1.3-V, the implemented 77GHz PA achieved a 3-dB gain bandwidth of 9-GHz (72.5-81.5 GHz), a peak gain of 22.4 dB, a saturated power ( P_{sat} ) of 16.4 dBm, and a peak power-added efficiency (PAE) of 20.3%. The area for the core layout is only 0.05 mm2, which demonstrates the highest power density among the recently reported W-band CMOS PAs.
Original language | English |
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Pages (from-to) | 159541-159548 |
Number of pages | 8 |
Journal | IEEE Access |
Volume | 9 |
DOIs | |
State | Published - 2021 |
Keywords
- CMOS technology
- millimeter-wave circuits
- power amplifiers
- transformers