相关实验视频
Updated: Jul 21, 2025

10:26
Fabrication and Characterization of Superconducting Resonators
Published on: May 21, 2016
11.4K
使用嵌入式电阻装载臂设计一个具有多个辐射零点的紧过准-Yagi天线
Lipeng Zhai1, Yi Guo1, Zongming Xu2
1School of Information Science and Technology, Nantong University, Nantong 226019, China.
Micromachines
|July 29, 2023
概括
一个具有电阻装载臂的新型紧类Yagi天线实现了过反应和四个辐射零值. 这种设计为5G应用提供了更小的端火尺寸.
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:
- 过天线对于现代无线通信系统来说至关重要,以减轻干扰.
- 准Yagi天线提供定向辐射,但往往缺乏固有的过能力.
- 实现具有多个辐射零值的紧过天线仍然是一个设计挑战.
研究的目的:
- 提出一个紧的准-Yagi天线与嵌入式电阻装载臂.
- 为了实现四个不同的辐射零值的过反应.
- 为了证明天线在5G N78频段的性能.
主要方法:
- 设计一个含有电阻装载臂的准Yagi天线结构.
- 利用反向电流和电阻装载臂的吸收来创建辐射零值.
- 整合一个balun和制造一个试验验证的原型.
主要成果:
- 拟议的天线具有四个辐射零点的过反应.
- 实现了0.13自由空间波长 (λ0) 的紧末火尺寸.
- 原型显示了22.9%的阻抗匹配带宽 (3.214.04 GHz) 和4.73dBi.
结论:
- 嵌入式电阻装载臂有效地产生额外的辐射零值,并吸收不必要的共振.
- 紧的过类Yagi天线提供了一个优越的解决方案,与现有的设计相比.
- 在5G N78频段的演示性能验证了天线的实际适用性.
相关概念视频
Mesh Analysis for AC Circuits
396
In the domain of radio communication, the significance of impedance matching must be considered. It is crucial to ensure the efficient transmission of signals between radio transmitters and receivers. Achieving this balance involves using impedance-matching circuits, with one fundamental configuration comprising a resistor, capacitor, and inductor.
The process of harmonizing these impedances begins with a clear understanding of the input and output signals. Once these signals are known, the...
The process of harmonizing these impedances begins with a clear understanding of the input and output signals. Once these signals are known, the...
396
Parallel Resonance
231
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:
231
Characteristics of Series Resonant Circuit
279
Series resonance occurs in a circuit containing inductive (L), capacitive (C), and resistive (R) elements connected sequentially. At the resonance frequency, the inductive and capacitive reactances are equal in magnitude but opposite in sign, effectively canceling each other. This causes the circuit's impedance is minimal, primarily determined by the resistance R. The resonant frequency of an RLC circuit is defined as:
279
Design Example: Capacitance Multiplier Circuit
830
In integrated circuit technology, a capacitance multiplier is often utilized to produce a larger capacitance value when a small physical capacitance falls short. This is achieved by a circuit that multiplies capacitance values by a factor of up to 1000, such that a 10-pF capacitor can replicate the performance of a 100-nF capacitor.
The circuit illustrated in Figure 1 below incorporates two op-amps, with the first operating as a voltage follower and the second acting as an inverting amplifier.
The circuit illustrated in Figure 1 below incorporates two op-amps, with the first operating as a voltage follower and the second acting as an inverting amplifier.
830
Design Example: Underdamped Parallel RLC Circuit
333
Consider designing an oscillator circuit, a crucial component in various electronic devices and systems. The objective is to create an oscillator circuit with specific characteristics: a damped natural frequency of 4 kHz and a damping factor of 4 radians per second. To accomplish this, a parallel RLC circuit is employed, known for its ability to sustain oscillations at a resonant frequency. In this case, the damping factor is pivotal in achieving the desired performance.
Starting with a fixed...
Starting with a fixed...
333
Series Resonance
207
The RLC circuit impedance is defined as the ratio of the supply voltage to the circuit current. Resonance in such a circuit occurs when the imaginary part of this impedance equals zero. This specific condition means that the inductive reactance is exactly equal to the capacitive reactance. The frequency at which this happens is known as the resonant frequency. Mathematically, the resonant frequency is inversely proportional to the square root of the product of the inductance (L) and capacitance...
207

