向大家请教一下，业余无线电中常见的这些接口 sma，bnc，tnc，n口，m口这些连接器规格，都有哪些技术特点或者应用上的区别？比如我设计自己的天馈线路，什么场合下使用什么规格的接口规格有哪些选型依据和原则？

@"BH7JUO"#p19092 收藏了谢谢

是这个图吗？![](https://)[upl-image-preview url=https://storage.hamcq.cn/2024-05-31/1717141742-133460-20240531154754.jpg]

听说N口比M口好，不知道对不对。

@"[已注销]"#p19447 是这样的

但是好多电台和馈线基本上都是M口

@"[已注销]"#p19482 日牌的电台uv段大多数都是N口，国产基本全是M口

说起来，不知道电视接头叫啥，是一个没有固定螺纹的接头。

@"[已注销]"#p19447 好像N口适合的频率比M口要高。

Please advise on the characteristics and application scenarios of common RF connector interfaces.

Atropin

I would like to ask everyone for their expertise on the common connector types used in amateur radio, such as SMA, BNC, TNC, N-type, and M-type. What are the technical characteristics or differences in their applications? For example, when designing my own RF cables, what are the selection criteria and principles for choosing the appropriate connector type based on the specific application?

BH7JUO

http://www.dwenzhao.cn/profession/RF/rf_nc.html

Atropin

BH7JUO Thank you for saving it.

YAOQI

Learned

BH1QAE

Is this the image? [https://](https://)

BG2EWI

[已注销] Here's how it goes:

BloodBlade

To be precise, I don't know what it's called – it's just a connector without any fixed threads.

BH1QAE

BloodBlade Is it a TNC?

BG2EWI

BloodBlade For CCTV cables, F-connectors are used on outdoor amplifiers and splitters, while 9.5mm TV connectors are used to connect the main television set and the set-top box.

BH1QAE

[已注销] It seems that N ports are suitable for higher frequencies than M ports.

BloodBlade

BG2EWI Okay, compared to other names, "9.5mm TV head" seems a bit strange.

BG2EWI

BloodBlade Typically, the male and female ends are referred to as TV-J/K heads.

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