Design of Novel Rat-Race Coupler Based Analog Pre-Distortion Circuit for 5G Applications

Bhargava, Gaurav; Majumdar, Shubhankar

doi:10.1109/iconat53423.2022.9725857

Cited by 5 publications

(2 citation statements)

References 7 publications

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“…In recent years, many states of the art analog linearizers using either diodes or transistors have been reported. [9][10][11][12][13][14][15][16][17] However, the linearization performances of the analog linearizers are still not good enough to linearize wideband PAs excited by high modulated signals, especially to RFPAs with 5G new radio (5G NR) signals. Therefore, in this article, in order to linearize 5G smallcell PAs, an APD, named as twin nonlinearity generator based APD (TNG-APD) made of the pseudomorphic high electron mobility transistor (pHEMT), is proposed.…”

Section: Introductionmentioning

confidence: 99%

Twin nonlinearity generator‐based analog predistorter for small‐cell power amplifiers

Huang

Liu

et al. 2022

Int J RF Mic Comp-Aid Eng

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In this article, a simple analog predistorter (APD), named twin nonlinearity generator based APD (TNG-APD) using the pseudomorphic high electron mobility transistor (pHEMT), is proposed for linearizing small-cell radio frequency power amplifiers (RFPAs) in the fifth-generation mobile communication system (5G). The TNG-APD is composed of two cascaded common-source field effect transistors (FETs) and a phase shifter. To verify the linearization, a TNG-APD circuit operating at central frequency of 3.5 GHz is fabricated to linearize wideband RFPAs. The RFPA under the test in this article is a 1-W RFPA for 5G small-cell basestations. The measurement results show that the adjacent channel power ratio (ACPR) of the RFPA is suppressed by more than 15 dB under a 100 MHz bandwidth 5G new radio (5G-NR) signal with simultaneous quadrature phase shift keying (QPSK) modulation and 256-quadrature amplitude modulation (256QAM), and more than 7 dB under a 200 MHz bandwidth 64 QAM signal. The measured error vector magnitude (EVM) under the 100 MHz 5G-NR signal is improved from 6.2% to 2.3%. Therefore, the proposed TNG-APD has high potential to linearize wideband RFPAs in the 5G small-cell basestation.

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Section: Introductionmentioning

confidence: 99%

Twin nonlinearity generator‐based analog predistorter for small‐cell power amplifiers

Huang

Liu

et al. 2022

Int J RF Mic Comp-Aid Eng

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“…Also, simulation-based PA circuit related to RF PA automation is discussed in related literature. 9 After reviewing previous literature on PA design [10][11][12] and automation, we are motivated to automate the design of class EFJ PA using a physics-informed automation method. In this article, it is proposed for the first time that the PA can be designed and validated with the help of a physics-informed neural network (PINN).…”

mentioning

confidence: 99%

Physics‐informed neural network assisted automated design of power amplifier by user defined specifications

Bhargava,

Kumari,

Vadalà

et al. 2024

Int J Numerical Modelling

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This article presents a model that can automatically produce a power amplifier's (PA) design parameters, that is, transmission lines (TLs) dimension, from a dataset of user‐specified design goals like gain, efficiency, linearity, and scattering (S‐) parameters. Based on the applied boundary conditions, a synthetic dataset is generated with the best range of design parameters (W and L). This dataset is utilized for training the physics‐informed neural network (PINN) model with user‐specified design goals as input and design parameters as target to produce the optimum value of W and L as the resultant output. Furthermore, utilizing the obtained dimensions, design, simulation, fabrication, and measurement of a PA are performed to validate our proposed model. The results of large signal measurements of PA are drain efficiency (DE) of 26.9%, power added efficiency (PAE) of 24.7%, output power (Pout) of 30.98 dBm at an input power of 19 dBm, and gain of 12.41 dB at an operating frequency of 1.625 GHz. It has been observed that the design parameters produced by the model have a significant agreement with the validated output. Also, the statistical error analysis is done by calculating the error metrics between the validated output and the actual output of the PA design.

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Pre‐Distortion

Bhargava

Majumdar

2023

RF Circuits for 5G Applications

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Design of Novel Rat-Race Coupler Based Analog Pre-Distortion Circuit for 5G Applications

Cited by 5 publications

References 7 publications

Twin nonlinearity generator‐based analog predistorter for small‐cell power amplifiers

Twin nonlinearity generator‐based analog predistorter for small‐cell power amplifiers

Physics‐informed neural network assisted automated design of power amplifier by user defined specifications

Pre‐Distortion

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