Design and analysis of a 55 to 71-GHz compact and broadband distributed active transformer power amplifier in 90-nm CMOS process
Resource
IEEE Transactions on Microwave Theory and Techniques, 57(7), 1637-1646
Journal
IEEE Transactions on Microwave Theory and Techniques
Journal Volume
57
Journal Issue
7
Pages
1637-1646
Date Issued
2009
Date
2009
Author(s)
Jen, Yung-Nien
Tsai, Jeng-Han
Huang, Tian-Wei
Abstract
A 55-71-GHz fully integrated power amplifier (PA) using a distributed active transformer (DAT) is implemented in 90-nm RF/MS CMOS technology. The DAT combiner, featuring efficient power combination and direct impedance transformation, is suitable for millimeter-wave (MMW) PA design. Systematic design procedures including an impedance allocation plan, a compensation line, and a gain boosting technique are presented for the MMW DAT PA. The monolithic microwave integrated circuit (MMIC) performs a high and flat small-signal gain of 26 plusmn1.5 dB from 55 to 71 GHz, which covers a full band for 60-GHz wireless personal area network applications. Using cascode devices and a DAT four-way power combination, the CMOS PA delivers 14.5- and 18-dBm saturated output power with 10.2% and 12.2% power-added efficiency under 1.8- and 3-V supply voltage, respectively, at 60 GHz. The maximum linear output power (P 1 dB ) is 14.5 dBm. To the best of our knowledge, the MMIC is the first demonstration of a V -band CMOS PA using a DAT combining scheme with highest linear output power among the reported 60-GHz CMOS PAs to date.
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Type
journal article
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