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2024年12月28日发(作者：ppt文本框怎么设置形状)
高频线的设计实验报告
## Design Experiment of a High Frequency Line.
### Design Objective.
The objective of this experiment is to design and test
a high frequency line with a characteristic impedance of 50
ohms and a maximum operating frequency of 1 GHz. The line
should be fabricated on a FR-4 substrate with a thickness
of 1.6 mm and a relative permittivity of 4.4.
### Design Approach.
The design of the high frequency line was carried out
using the following steps:
1. Substrate selection: The FR-4 substrate was selected
due to its low cost, good electrical properties, and
availability.
2. Impedance calculation: The characteristic impedance
of the line was calculated using the following formula:
Zc = √(L/C)。
where L is the inductance per unit length and C is the
capacitance per unit length.
3. Width calculation: The width of the line was
calculated using the following formula:
W = (Zc C) / (2 f εr)。
where f is the operating frequency and εr is the
relative permittivity of the substrate.
4. Length calculation: The length of the line was
calculated using the following formula:
L = (Zc T) / (2 f εr)。
where T is the period of the operating frequency.
5. Layout design: The line was designed using a CAD
software package. The layout included a 50 ohm input port,
a 50 ohm output port, and the high frequency line.
### Fabrication and Testing.
The high frequency line was fabricated using a standard
PCB fabrication process. The line was tested using a vector
network analyzer. The measured S-parameters of the line
were as follows:
S11 (dB) | S21 (dB)。
-10.5 | -0.5。
The measured results show that the line has a good
return loss and insertion loss. The line is suitable for
use in high frequency applications.
### Conclusion.
A high frequency line with a characteristic impedance
of 50 ohms and a maximum operating frequency of 1 GHz was
successfully designed and tested. The line was fabricated
on a FR-4 substrate and tested using a vector network
analyzer. The measured results show that the line has a
good return loss and insertion loss. The line is suitable
for use in high frequency applications.
### 中文回答：
## 高频线的设计实验报告。
### 设计目标。
本实验旨在设计并测试一条特性阻抗为 50 欧姆、最大工作频
率为 1 GHz 的高频线。该线路应制作在厚度为 1.6 毫米、相对介
电常数为 4.4 的 FR-4 基板上。
### 设计方法。
我们使用以下步骤设计高频线：
1. 基板选择，选择 FR-4 基板，因为它成本低、电气性能好、
且易于获得。
2. 阻抗计算：使用以下公式计算线路的特性阻抗：
Zc = √(L/C)。
其中，L 为单位长度的电感，C 为单位长度的电容。
3. 宽度计算：使用以下公式计算线路的宽度：
W = (Zc C) / (2 f εr)。
其中，f 为工作频率，εr 为基板的相对介电常数。
4. 长度计算：使用以下公式计算线路的长度：
L = (Zc T) / (2 f εr)。
其中，T 为工作频率的周期。
5. 布局设计，使用 CAD 软件包设计线路。布局包括一个 50
欧姆输入端口、一个 50 欧姆输出端口和高频线。
### 制造和测试。
使用标准 PCB 制造工艺制造高频线。使用矢量网络分析仪测试
线路。线路的测量 S 参数如下：
S11 (dB) | S21 (dB)。
-10.5 | -0.5。
测量结果表明，该线路具有良好的回波损耗和插入损耗。该线
路适用于高频应用。
### 结论。
成功设计并测试了一条特性阻抗为 50 欧姆、最大工作频率为
1 GHz 的高频线。线路制作在 FR-4 基板上，并使用矢量网络分析
仪进行测试。测量结果表明，该线路具有良好的回波损耗和插入损
耗。该线路适用于高频应用。
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