大家有没有经历sma接头失效的时候？我想给这项目选个好用的接头。目前在考虑sma还是bnc。SMA的话就是十分小巧，BNC感觉多次插拔会耐用些，可是占用空间。以前我的vna出现过sma接头接触不良的情况，所以我对sma的耐用性保持质疑。你们怎么想？ [upl-image-preview uuid=1faf59e4-94df-4c42-a4d6-70863756cf1e url=https://storage.hamcq.cn/2026-01-16/1768572619-622577-download.jpg alt={TEXT?}] [upl-image-preview uuid=c6c27d32-9ee6-4ee2-a731-e9e9495929c3 url=https://storage.hamcq.cn/2026-01-16/1768572623-558145-download-1.jpg alt={TEXT?}]

用SMA还是BNC，主要看频率、第二看对体积大小的要求。耐用性他们都没有问题，只要你买贵的。 SMA可以响应到26.5GHz BNC虽说最大用到6GHz（但实际很少用到1GHz以上）

镀金插头汗液会腐蚀，建议每次用完用布擦一下

Are SMA connectors durable?

BG7MEB

Has anyone experienced SMA connection failures before? I'm looking for a reliable SMA connector for this project.
Currently, I'm considering SMA versus BNC connectors. SMA connectors are very small, while BNC connectors seem more durable for repeated plugging and unplugging, but they take up more space.
Previously, I had experienced issues with SMA connectors making poor contact with my VNA, which led me to question the durability of SMAs.
What are your thoughts?

BG0GAA

Please insert it slowly.

BA7NQ

The choice between SMA and BNC connectors primarily depends on the frequency requirements, with size also being a factor.
Their durability is not a problem; it depends on how much you spend.
The SMA can respond to frequencies up to 26.5 GHz.
Although BNC can theoretically operate up to 6 GHz (but in practice, it's rarely used above 1 GHz).

BD6JYO

Gold-plated connectors are prone to corrosion; it is recommended to wipe them clean with a cloth after each use.

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