High-Power Digital Transmitters for Wireless Infrastructure Applications (A Feasibility Study)

Journal article (2022)

Authors

R.J. Bootsman Electronics -

D.P.N. Mul Electronics -

Y. Shen IMEC, Electronics -

M. Hashemi Electronics - , ItoM

Rob Heeres Ampleon Netherlands B.V.

Fred van Rijs Ampleon Netherlands B.V.

S.M. Alavi Electronics -

L.C.N. de Vreede Electronics -

Research Group

Electronics () (TU Delft)

DOI: https://doi.org/10.1109/TMTT.2022.3153000

GaN Efficient CMOS CMOS technology Digital predistortion (DPD) Radio frequency Logic gates Threshold voltage Power generation Switches Class-E Digital transmitter (DTX) High-power RF Laterally-diffused MOS (LDMOS) Mixing power digital-to-analog converter (DAC) Polar. Transmitters

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Published Date

2022

Language

English

Reuse Rights

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Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Microelectronics

Research Group

Electronics

Abstract

Fully digital transmitters (DTXs) have the potential of replacing analog-intensive transmitter (TX) line-ups in future massive multiple-input and multiple-output (mMIMO) systems since they hold the promise of higher system integration level and energy efficiency. DTX operation so far has been limited to low RF output powers. This article introduces a concept that enables high-power DTX operation. A DTX demonstrator targeting both high output power and high efficiency is realized as a proof of concept. It is based on a custom <formula> <tex>${V_{T}}$</tex> </formula> -shifted laterally-diffused MOS (LDMOS) technology, which is utilized to implement a segmented high-power output stage operated in class-BE. A low-voltage high-speed 40-nm CMOS controller drives the individual output stage segments at gigahertz rates. Measurements show the promising results for the proposed high-power DTX concept and provide valuable lessons for future DTX implementations.

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