COMBINATION OF SYNTHETIC HIGH-PERFORMANCE RF AMPLIFICATION TECHNIQUES
COMBINATION OF SYNTHETIC HIGH-PERFORMANCE RF AMPLIFICATION TECHNIQUES
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综合高性能射频放大技术的组合
DOI：
10.36724/2072-8735-2021-15-9-11-16
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发表时间：
2021
期刊：
影响因子：
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通讯作者：
S. E. Grychkin
中科院分区：
文献类型：
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作者：
O. Varlamov;Dang;S. E. Grychkin
为了以高效率放大现代高波峰因数电信无线电信号，使用晶体管的切换操作模式和合成放大方法。其中最常见的是Kahn方法（EER -包络消除和恢复）和移相方法。然而，这些方法的应用在放大信号的带宽和动态范围上具有许多技术限制（在元件基础能力方面）。为了扩大高效率射频功率放大器的应用领域，人们正在考虑将几种不同的合成放大技术相结合的可能性。表达式获得的理论上可实现的效率时，结合移相方法与桥式功率合成器和脉冲阶跃调制的电源电压。平均效率对电源电压电平的数量的依赖性被确定。RF放大信号带宽及其动态范围决定了EER放大器的PWM调制器所需的最小脉冲宽度。这些特性的变量依赖于电源电压电平的数量进行了讨论与组合使用的PWM和脉冲阶跃调制的电源电压。进一步研究的方向制定。
To amplify modern high crest factor telecommunication radio signals with high efficiency, switching operation modes of transistors and synthetic amplification methods are used. The most common of these are the Kahn method (EER – envelope elimination and restoration) and the outphasing method. However, application of these methods has a number of technological (in terms of element base capabilities) limitations on the bandwidth and dynamic range of amplified signal. To expand high-efficiency RF power amplifiers field of application, the possibilities of combination several different synthetic amplification techniques are being considered. Expressions are obtained for the theoretically achievable efficiency when combining the outphasing method with a bridge power combiner and pulse-step modulation of supply voltage. The dependence of average efficiency on the number of supply voltage levels is determined. RF amplified signal bandwidth and its dynamic range determine the minimum required pulse width of the PWM modulator for the EER amplifier. Variants of these characteristics dependence on the number of supply voltage levels are discussed with combined use of PWM and pulse-step modulation of the supply voltage. Directions for further research are formulated.