Wideband High Efficiency Power Amplifier Design Using Precise High Frequency GaN-HEMT Parasitics Modeling/Compensation

Sayed, Ahmed S.; Ahmed, Hesham N.

doi:10.1109/pawr.2019.8708722

Cited by 10 publications

(6 citation statements)

References 7 publications

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“…As a result, the posterior distribution obtained by calculating the formula for conditional distribution under the joint prior distribution of the GP is shown in (4).…”

Section: Probabilistic Surrogate Modelmentioning

confidence: 99%

“…As one of the most critical components of a wireless system, RFPAs play an important role in the performance of the entire system. Due to these factors, circuit designers are increasingly focusing on PAs with high performance features, such as wide bandwidth, high output power, and high PAE 4 . To meet this demand, a variety of PA implementation methods have been proposed.…”

Section: Introductionmentioning

confidence: 99%

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Broadband PA design using Bayesian algorithms with different covariance functions

Huang

Hao

et al. 2023

Int J Numerical Modelling

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This article examines the effects of Bayesian optimization (BO) with different covariance functions on the optimization of a radio frequency power amplifier (RFPA). An initial PA is designed based on a Chebyshev low‐pass topology using a 10 W Gallium Nitride (GaN) transistor. The objective function is established in a novel manner. The performance of the initially designed PA was optimized by using various BO algorithms, including two different acquisition functions and five different covariance functions. Both simulation and measurement results indicate that the kernel squared exponential (KSE) and Matérn32 covariance functions provide the best option for optimizing PA by BO. A broadband power amplifier (PA) operating at a frequency range from 2.5 GHz to 3.5 GHz has been developed with an output power (Pout) greater than 40.8 dBm and a power‐added efficiency (PAE) greater than 65%.

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“…As a result, the posterior distribution obtained by calculating the formula for conditional distribution under the joint prior distribution of the GP is shown in (4).…”

Section: Probabilistic Surrogate Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Broadband PA design using Bayesian algorithms with different covariance functions

Huang

Hao

et al. 2023

Int J Numerical Modelling

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“…The loss function used in this paper to measure the accuracy of the prediction is the squared loss function, which measures the difference between the predicted value, Y, and the actual output value, T, of the circuit. Detail expression is shown below: 𝐿 (𝑌, 𝑇) = (𝑌 − 𝑇) 2 (30)…”

Section: ) Ei*pimentioning

confidence: 99%

A Novel Design Methodology for a Multioctave GaN-HEMT Power Amplifier Using Clustering Guided Bayesian Optimization

2022

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“…The necessary measurements are carried out in an attempt to compare the performance of the PA based on the nonlinear parasitics extraction approach adopted within this work {PA NL } to that of the PA presented by the authors {PA L } in [20]. Figures 18 and 19 present the target comparison.…”

Section: Implementation and Measurementsmentioning

confidence: 99%

“…In [20], the authors proposed a 25 W wideband PA (hereafter named PA L ) based on a new parasitic equivalent network, and a direct compensation network for the device parasitics. It utilised a model‐based deductive parasitics extraction approach using linear S‐parameter simulations.…”

Section: Introductionmentioning

confidence: 99%

High‐efficiency broadband power amplifier design via ideal de‐embedding and direct compensation of GaN‐HEMTs parasitics

Sayed

Ahmed

Darwish

2022

IET Microwaves Antenna & Prop

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In this work, a design approach for broadband high-efficiency power amplifiers is presented. The proposed technique is based on deductive de-embedding of the nonlinear parasitics of packaged GaN-HEMT devices. A new transistor parasitics equivalent network is proposed that utilises a model-based extraction flow. A simple two-element compensation network is then used to accurately compensate the extracted nonlinear device parasitics; this enables optimum load resistance to be presented to the device current generator using a real-to-real matching network. In order to validate the proposed concept, a single-ended Class-AB power amplifier is designed and fabricated using a Wolfspeed 25-W GaN HEMT 'CGH40025F' transistor. At a centre frequency of 2.35 GHz, a fractional bandwidth of 55% is achieved. The measured average drain efficiency and power gain of the designed power amplifier are 71% and 10.4 dB, respectively.

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Wideband High Efficiency Power Amplifier Design Using Precise High Frequency GaN-HEMT Parasitics Modeling/Compensation

Cited by 10 publications

References 7 publications

Broadband PA design using Bayesian algorithms with different covariance functions

Broadband PA design using Bayesian algorithms with different covariance functions

A Novel Design Methodology for a Multioctave GaN-HEMT Power Amplifier Using Clustering Guided Bayesian Optimization

High‐efficiency broadband power amplifier design via ideal de‐embedding and direct compensation of GaN‐HEMTs parasitics

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