制作12db圆筒天线的方法及公式
扫描二维码
随时随地手机看文章
圆筒天线的制作
We chose to build the antenna for 2.442GHz, or channel 7, as this is close to the center of the 13 channels available to us (US designs use channel 6 (2.437Ghz), as they have 11 channels). I have included a key lengths calculator in the form below. Nb.Rectangular waveguides use a different formulae (see Rectangular Waveguide).
The final product only needs to be accurate to about 1mm as this will only shift the frequency within the range of the 802.11 spectrum. A smaller cavity length will shift the frequency response to that slot to a higher channel. A longer slot cavity length will shift it down.
Methods and madness
I measured to .1mm using vernier callipers, on the assumption that errors in cutting might bring that closer to the 1mm error mark. There are only one to make, and you can't go too wrong, i.e. the probe (N-Socket) position.
Misc Notes
* The probe is a 2mm diameter copper wire soldered into an N-Socket and cut to 31mm (1/4 free space wavelength, including the protruding bit of the N-Socket).
* 探针采用的是2mm直径的铜线焊接在N接头的槽上。探针长度为31mm，包含N接头突起的部分。
* The N-Socket is held down with nylon screws. If you use metal screws, use stainless steal ones and keep them short so they don't protrude into the cavity.
* Water in the antenna, or spider and insects will be a problem. One suggestion is to seal around the edges of the reflector with silicone and cover the open end with a piece of plastic (microwave friendly and thin).
N-Socket with 1/4 wavelength copper wire (including the length of the bit of the N-Socket it is soldered into). This becomes the probe for the antenna.
下载文档
热门文章
- 硬刚到底！大疆正式起诉美国FCC，这场反击太解气
- 马斯克的SpaceX要造手机了 可直连星链！
- 国产仿真软件NESIM-A发布 国产EDA重要里程碑
- TrendForce集邦咨询: 受CPU、存储器价格同步上涨压力，预估2026年第一季度笔电出货量将季减14.8%
- 宇树科技澄清2025年销量数据：人形机器人实际出货量超5500台
- TrendForce集邦咨询: 新机调价抑制销售需求，2026年第二季度起智能手机生产承压明显
- 盘点晶体谐振器振荡频率温度特性异常的几个原因
- YL-335B自动化生产线装配单元Ⅱ程序设计
- Keil MDK软件包(pack)下载的几种方法详解
- 一文搞懂脉冲宽度调制（PWM）原理、频率与占空比
