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In this case the antenna connector is the standard horrible little U.FL, which is connected with coaxial to a bigger one grounded to chassis. The main ESD risk is when someone is connecting or re...
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#2: Post edited
by
Nick Alexeev
·
2023-09-26T20:57:20Z (about 1 year ago)
just piling up reference material
- > In this case the antenna connector is the standard horrible little U.FL, which is connected with coaxial to a bigger one grounded to chassis. The main ESD risk is when someone is connecting or removing the coax. It's quite easy to touch the center pin with ones fingers on a U.FL. [from [this comment by the O.P.](https://electrical.codidact.com/comments/thread/5785#comment-16298)]
- Your vulnerable U.FL connector is inside the chassis. I'm assuming that only trained personnel will be working inside of your chassis (no user-serviceable parts, etc).
Put a note in the service manual that the person who unplugs the U.FL plug should wear ESD protection. Put ESD warning stickers inside the chassis too, for a good measure. I've seen this approach in medical devices.
- > In this case the antenna connector is the standard horrible little U.FL, which is connected with coaxial to a bigger one grounded to chassis. The main ESD risk is when someone is connecting or removing the coax. It's quite easy to touch the center pin with ones fingers on a U.FL. [from [this comment by the O.P.](https://electrical.codidact.com/comments/thread/5785#comment-16298)]
- Your vulnerable U.FL connector is inside the chassis. I'm assuming that only trained personnel will be working inside of your chassis (no user-serviceable parts, etc).
- Put a note in the service manual that the person who unplugs the U.FL plug should wear ESD protection. Put ESD warning stickers inside the chassis too, for a good measure. I've seen this approach in medical devices.
- [Edit. Just piling up reference material.]
- [SiLabs application note AN895.](https://www.silabs.com/documents/public/application-notes/AN895.pdf#page=16) Fig. 19 shows an example for ESD protection circuit for a radio antenna port.
#1: Initial revision
by
Nick Alexeev
·
2022-02-26T19:07:29Z (over 2 years ago)
> In this case the antenna connector is the standard horrible little U.FL, which is connected with coaxial to a bigger one grounded to chassis. The main ESD risk is when someone is connecting or removing the coax. It's quite easy to touch the center pin with ones fingers on a U.FL. [from [this comment by the O.P.](https://electrical.codidact.com/comments/thread/5785#comment-16298)] Your vulnerable U.FL connector is inside the chassis. I'm assuming that only trained personnel will be working inside of your chassis (no user-serviceable parts, etc). Put a note in the service manual that the person who unplugs the U.FL plug should wear ESD protection. Put ESD warning stickers inside the chassis too, for a good measure. I've seen this approach in medical devices.