Impact of Power Amplifier Long Term Memory Effects in Spatial Derivative Superposition Systems

被引：2

作者：

Cabria, Lorena ^{[1
]}

Garcia, Jose Angel ^{[1
]}

Pedro, Jose Carlos ^{[2
]}

机构：

[1] Univ Cantabria, Dept Commun Engn, E-39005 Santander, Spain

[2] Univ Aveiro, Inst Telecommun, P-3810193 Aveiro, Portugal

来源：

IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS | 2008年 / 18卷 / 11期

关键词：

Active arrays; memory effects; nonlinear distortion; power amplifiers (PAs);

D O I：

10.1109/LMWC.2008.2005237

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In this letter, the impact of power amplifier (PA) long term memory effects on intermodulation distortion cancellation performance of spatial derivative superposition systems is evaluated. Employing a behavioral model derived from Volterra series analysis, these important nonlinear dynamic effects could be taken into account for evaluating the impairment of the linear characteristics sought in the beam pointing direction. Radiation patterns obtained from simulations of a four-element active array highlight the influence of field effect transistor drain impedance characteristics on the achieved bandwidth. Measurement results, herein reported for the first time, validate the proposed analysis as well as the capability of this technique for improving linearity with spatial selectivity.

引用

页码：758 / 760

页数：3

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