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相关概念视频

The Antenna Complex01:15

The Antenna Complex

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Plants and other photosynthetic organisms comprise pigments capable of absorption of direct sunlight. These pigments are present in the reaction center - the main site of photochemical reactions as well as in the antenna complex. Under average light conditions, the rate at which reaction center pigments absorb light is far below the electron transport chain's capacity. As a result, the reaction center alone cannot provide enough energy to drive photosynthesis. The photosynthetic efficiency can...
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Tandem mass spectrometry is a technique that uses multiple mass analyzers in series to obtain a higher selectivity and reduce chemical noise during analyte detection. Instruments with multiple analyzers separated by an interaction cell enable secondary fragmentation and selected study of the fragment ions.Secondary fragmentations occur in the interaction cell and can be induced by various factors. Fragmentation induced by collision with inert gases, such as N2, Ar, He, etc., is called...
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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).
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Transmission lines are essential components of electrical power systems. They are characterized by the distributed nature of resistance (R), inductance (L), and capacitance (C) per unit length. To analyze these lines, differential equations are employed to model the variations in voltage and current along the line.
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Instrument transformers, comprising voltage transformers (VTs) and current transformers (CTs), play crucial roles in power substations by providing isolated replicas of current or voltage for measurement and protection purposes. Voltage transformers reduce the primary voltage to levels suitable for relay operation and measurement, while current transformers scale down the primary current. The primary winding of a current transformer often consists of a single turn, achieved by threading the...
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一个宽带低形天线,用于高集成的分相阵列系统.

Haipeng Liu1,2, Juan Liu1,2, Jin Huang1

  • 1School of Mechano-Electronic Engineering, Xidian University, Xi'an 710071, China.

Sensors (Basel, Switzerland)
|June 19, 2024
PubMed
概括
此摘要是机器生成的。

本研究介绍了一种用于高集成相位阵列系统的宽带低形天线. 这种新的设计提供了出色的扫描性能,适合在生产环境中进行紧的模块化组装.

关键词:
一个天线天线天线.这是一个模块化的模块化系统.阶段式数组数组是一个阶段式数组数组.紧紧地紧紧地紧紧地

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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:

  • 阶段阵列系统需要紧的宽带天线来实现高集成.
  • 现有的紧密合的天线通常在元素间距和寄生辐射方面存在局限性.

研究的目的:

  • 为高集成阶段阵列系统提供适合高集成阶段阵列系统的宽带低形天线.
  • 为实际工程应用解决元素间距和寄生辐射方面的挑战.

主要方法:

  • 实施紧密合的阵列天线设计.
  • 对寄生虫辐射的分析和抑制方法的开发.
  • 模块化制造方法使用四元单元用于灵活组装.

主要成果:

  • 该天线在X-K频段 (8GHz-18.5GHz) 上有效运行.
  • 在E平面和H平面实现了±60度的扫描能力.
  • 通过模拟和测量验证了出色的图案和扫描辐射性能.

结论:

  • 开发的天线符合高集成阶段阵列系统的要求.
  • 模块化设计和寄生性辐射抑制方法促进了实际的工程应用.
  • 该天线的性能适合接到球网格阵列 (BGA) T / R芯片.