A new assessment method of pHEMT models by comparing relative errors of drain current and its derivatives up to the third order

IEEE Radio and Antenna Days of the Indian Ocean

无线电电子学

Dobe, Josef^1 ; Grábner, Martin^1 ; Purier, Pavel^1 ; Vejraka, Frantiek^1 ; Michal, Jan^1 ; Popp, Jakub^1

Department of Radioelectronics, Faculty of Electrical Engineering, Czech Technical University, Prague, Czech Republic^1

关键词: Absolute error;    Constellation satellites;    Drain current equation;    Higher order derivatives;    Operating points;    Relative errors;    Root mean square errors;    Third order;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/198/1/012004/pdf
DOI  :  10.1088/1757-899X/198/1/012004

来源: IOP

【 摘 要 】

Nowadays, there exist relatively precise pHEMT models available for computer-aided design, and they are frequently compared to each other. However, such comparisons are mostly based on absolute errors of drain-current equations and their derivatives. In the paper, a novel method is suggested based on relative root-mean-square errors of both drain current and its derivatives up to the third order. Moreover, the relative errors are subsequently relativized to the best model in each category to further clarify obtained accuracies of both drain current and its derivatives. Furthermore, one our older and two newly suggested models are also included in comparison with the traditionally precise Ahmed, TOM-2 and Materka ones. The assessment is performed using measured characteristics of a pHEMT operating up to 110 GHz. Finally, a usability of the proposed models including the higher-order derivatives is illustrated using s-parameters analysis and measurement at more operating points as well as computation and measurement of IP3points of a low-noise amplifier of a multi-constellation satellite navigation receiver with ATF-54143 pHEMT.