Print Email Facebook Twitter Load-Modulation-Based IMD3 Cancellation for Millimeter-Wave Class-B CMOS Power Amplifiers Achieving EVM < 1.2% Title Load-Modulation-Based IMD3 Cancellation for Millimeter-Wave Class-B CMOS Power Amplifiers Achieving EVM < 1.2% Author Pashaeifar, M. (TU Delft Electronics) de Vreede, L.C.N. (TU Delft Electronics) Alavi, S.M. (TU Delft Electronics) Date 2022 Abstract This letter presents a novel load-modulation-based 3rd-order intermodulation distortion (IMD3) cancellation technique for class-B CMOS power amplifiers (PAs). In a class-B PA, the IMD3 generated by the 3rd-order transconductance ( $g_{m3}$ ) and the gain compression have opposite signs, and thus, they can cancel each other at specific bias and loading conditions. The proposed Doherty topology allows adjusting the gain compression by modulating the effective loading, facilitating IMD3 cancellation over the entire load modulation region. The proposed approach is verified using a 28 GHz 40 nm CMOS series-Doherty PA (DPA) topology. The experimental result demonstrates 10/17 dB IMD3 improvement compared to class-B/DPA operation. Without using any digital pre-distortion, the measured EVM of the proposed technique for a 50 MHz 64-QAM OFDM signal with 8.9 dBm average output power is -38.7 dB (1.2%), which is 5.7/11 dB better than a standard class-B/DPA operation. Subject 5G mobile communication5G New Radio (NR)Dohertyintermodulation distortionLinearityload modulationLogic gatesmillimeter-waveModulationOFDMpower amplifiers (PAs).Power generationWireless communication To reference this document use: http://resolver.tudelft.nl/uuid:590e67fa-0509-4e41-aab7-621dbb6388f1 DOI https://doi.org/10.1109/LMWC.2022.3166257 ISSN 1531-1309 Source IEEE Microwave and Wireless Components Letters, 32 (6), 716-719 Part of collection Institutional Repository Document type journal article Rights © 2022 M. Pashaeifar, L.C.N. de Vreede, S.M. Alavi Files PDF Load_Modulation_Based_IMD ... lt_1.2.pdf 3.18 MB Close viewer /islandora/object/uuid:590e67fa-0509-4e41-aab7-621dbb6388f1/datastream/OBJ/view