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• W2887769013 abstract "This paper presents a high-efficiency neutralized continuous class-F (CCF) CMOS power amplifier (PA) design technique for millimeter-wave (mmW) 5G mobile communications. A parasitic-aware tuned-load with a high-order harmonic-resonance network is proposed to shape the current and voltage waveforms for the CCF PA. At mmW frequencies, the gate-drain capacitance ( $C_{mathrm {gd}}$ ) creates adverse capacitive loading on harmonic-tuned output load networks. As a result, a CCF PA suffers from compromised power efficiency. To address this, we integrate a transformer with a tunable coupling coefficient between gate-drain of the power-device. This proposed technique allows accurate neutralization of $C_{mathrm {gd}}$ , reducing detrimental loading effect on harmonic-tuned load while enhancing power efficiency and stability. We fabricated a CCF PA in 65-nm CMOS technology achieving >40% power-added efficiency (PAE) over 33.3% fractional bandwidth (25–35 GHz) and 46.4% peak PAE at 29 GHz. The measured peak saturated output power ( $P_{o,mathrm {sat}}$ ) is 14.8 dBm at 30 GHz. The PA is tested with 64-quadrature-amplitude-modulated signal at a data rate of 1.5 Gb/s. Under this test setup, the PA achieves modulated PAE of 26%/24%/21.4% and average output power ( $P_{o,mathrm {avg}}$ ) of 9.2/8.8/8.6 dBm at 28, 32, and 34 GHz, respectively, while maintaining better than −25 dB of error vector magnitude and −27 dBc of adjacent channel leakage ratio. To the authors’ knowledge, this design presents one of the highest reported PAEs among mmW CMOS PAs." @default.
• W2887769013 created "2018-08-22" @default.
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• W2887769013 date "2019-02-01" @default.
• W2887769013 modified "2023-10-14" @default.
• W2887769013 title "A 25–35 GHz Neutralized Continuous Class-F CMOS Power Amplifier for 5G Mobile Communications Achieving 26% Modulation PAE at 1.5 Gb/s and 46.4% Peak PAE" @default.
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• W2887769013 doi "https://doi.org/10.1109/tcsi.2018.2860019" @default.
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