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理论比较不同的封面消除和恢复发射器PWM调制器配置,以扩大可能的天线不匹配的理论比较
Dang Canh Nguyen1, Victor N Gromorushkin1, Oleg Varlamov1
1Department of Radio Equipment and Circuitry, Moscow Technical University of Communication and Informatics, 111024 Moscow, Russia.
Sensors (Basel, Switzerland)
|December 9, 2023
概括
本研究分析了外包消除和恢复 (EER) 发射器中的低通波器 (LPF) 如何影响带外排放. 对于共振天线,建议使用六级双面加载的LPF,以提高效率和扩展应用.
科学领域:
- 电气工程 电气工程
- 无线电频率 (RF) 工程
- 信号处理 信号处理
背景情况:
- 高效切换模式固态功率放大器使用封面消除和恢复 (EER) 技术.
- EER发射器的性能受到其构成组件的特性,特别是外路径低通波器 (LPF) 的显著影响.
- 带外排放是影响射频发射器光谱纯度和监管合规性的关键参数.
研究的目的:
- 为了研究不同的外路径LPF类型和参数对EER发射器带外排放的影响.
- 为了分析EER发射器运行,使用一种新的调制器配置,为双面加载的LPF提供匹配的输出阻抗.
- 为了在不同的负载条件下比较各种LPF配置的带外辐射性能,包括名义和共振天线.
主要方法:
- 理论上比较四个信封路径LPF配置:单面和双面加载的LPF,具有光滑和利的过渡.
- 用名义宽带天线和带宽有限的共振天线对EER发射机运行的分析.
- 对拟议的调节器配置进行评估,对双面负载LPF进行匹配的输出阻抗.
主要成果:
- 该研究发现,具有平滑过渡的六阶双面加载LPF是使用共振天线运行的EER发射器的首选配置.
- 拟议的调制器配置允许在信号频段边缘的电压恒定波比 (VSWR) 为1.07的天线上运行发射器.
- 发现,对于共振天线操作来说,最小的LPF带宽是放大信号带宽的5.8倍.
结论:
- 选择的信封路径LPF显著影响到EER发射器的带外排放.
- 拟议的双面装载LPF配置提供了更好的性能,特别是对于与共振天线相连的发射器.
- 这项研究促进了EER发射器的扩展应用能力,允许减少PWM时钟频率和提高整体效率.
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