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相关概念视频

Configurations of BJT01:16

Configurations of BJT

329
Bipolar Junction Transistors (BJTs) are categorized into various types based on their configurations, each with distinct characteristics and applications. The configurations are primarily differentiated by which terminal—base, emitter, or collector—is common to both the input and output circuits.
The common base configuration is noted for its high voltage gain, positioning it as an ideal choice for single-stage amplifier circuits, such as microphone pre-amplifiers. A notable...
329
Parallel Resonance01:23

Parallel Resonance

174
The parallel RLC circuit is an arrangement where the resistor (R), inductor (L), and capacitor (C) are all connected to the same nodes and, as a result, share the same voltage across them. The parallel RLC circuit is analyzed in terms of admittance (Y), which reflects the ease with which current can flow. The admittance is given by:
174

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相关实验视频

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Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters
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基于TM30/TM03模式的紧型高增益圆极化补丁天线.

Hoang Nguyen-Huy1, Duc-Nguyen Tran-Viet2, Phuong Kim-Thi3

  • 1Faculty of Electrical and Electronic Engineering, PHENIKAA University, Yen Nghia, Ha Dong, Hanoi 12116, Vietnam.

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概括

这项研究介绍了一种紧的,高收益的循环极化 (CP) 微条纹补丁天线. 使用高阶模式补丁和基板集成波导 (SIW) 腔,它实现了显著的增益和减少后辐射.

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科学领域:

  • 电磁学和波浪传播
  • 天线理论和设计.
  • 微波工程 微波工程

背景情况:

  • 微条纹补丁天线由于其低形状和可整形性而被广泛使用.
  • 在一个紧的形式因素中同时实现高增益和循环极化仍然是一个挑战.
  • 减少反向辐射对于许多天线应用来说至关重要,以尽量减少干扰.

研究的目的:

  • 设计和验证一个具有高增益和紧尺寸的循环极化 (CP) 微条纹补丁天线.
  • 调查使用高阶模式来提高辐射性能.
  • 为了减少背面辐射,使用基板集成波导 (SIW) 腔.

主要方法:

  • 采用高阶模式补丁天线设计.
  • 利用对角线料和不平等的中心交叉槽来产生直角的TM03和TM30模式.
  • 在补丁周围集成了一个基板集成波导 (SIW) 腔,以减少背面辐射.
  • 制造并测量了一个天线原型,用于验证.

主要成果:

  • 拟议的天线在中心频率上实现了1.27λ x 1.27λ x 0.03λ的紧尺寸.
  • 测量的工作带宽 (S11 < -10 dB,AR < 3 dB) 从5.435到5.475 GHz.
  • 在工作频段内达到大约12dBi的高增强辐射.
  • 与没有SIW腔的类似天线相比,减少了两倍的背辐射.

结论:

  • 开发的高顺序模式微条纹补丁天线有效地辐射高收益CP波.
  • 整合SIW腔是实现紧尺寸和减少背部辐射的可行方法.
  • 原型测量验证了设计的性能,证明其适用于需要高增益和低背叶的应用.