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Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

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Inductively coupled plasma (ICP) is the common plasma source used in atomic emission spectroscopy (AES), a technique that detects and analyzes various elements in a sample. This method is often called inductively coupled plasma atomic emission spectroscopy (ICP-AES).
There are three main types of inductively coupled plasma atomic emission spectroscopy  (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used....
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Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters
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两维光束扫描可编程比特阵列天线,具有广泛的频率调范围和极化敏捷性.

Hao Huang, Siyuan Zhao, Pengfei Gao

    Optics express
    |February 18, 2026
    PubMed
    概括

    本研究介绍了一种可编程比特阵列天线,其频率,极化和方向可调节. 这种可重新配置的天线为现代通信系统提供了更大的灵活性.

    科学领域:

    • 电气工程 电气工程
    • 电磁学 电磁学 电磁学 电磁学
    • 天线理论天线理论

    背景情况:

    • 现代通信系统需要具有可适应性特性的天线.
    • 现有的天线往往缺乏灵活性,无法同时重新配置多个参数.

    研究的目的:

    • 设计和实验验证一种新的可编程比特阵列天线.
    • 为了实现可重新配置的操作频率,极化状态和辐射方向.

    主要方法:

    • 一个环形环形结构的散热器,配有varactor二极管,用于连续调节频率.
    • 一个不对称的可重新配置的印制威尔金森功率分隔器,配有希夫曼相位变换器用于偏振控制.
    • 可编程的辐射元件用于二维光束扫描.

    主要成果:

    • 在1.42.3 GHz连续调范围 (48.6%带宽) 上对天线设计的实验验证.
    • 演示可重新配置的频率,双圆极化和二维扫描功能.
    • 模拟和实验结果之间的良好一致性,证实了设计可靠性.

    结论:

    • 拟议的可编程比特阵列天线提供了显著的灵活性和多功能性.

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  • 这种可重新配置的天线技术非常适合先进的通信系统.
  • 该设计验证了多个可重新配置参数在单个天线阵列中的集成.