FreeLists / si-list / [SI-LIST] ESD solution on antenna output

[Ian Barrett <Ibarrett@xxxxxxxxxxxxxx>]

I am currently having a lively discussion with a colleague about an ESD
problem we have encountered. The trouble is I don't think either of us know
enough to be able to convince the other of our point of view.

The product is a small radio transmitter that is very susceptible to an ESD
spike applied directly to it's antenna. The design includes a small inductor
between the antenna output and ground. My colleague (the designer) put it
there to try and alleviate any potential ESD problems. I have found that I
cannot solve the ESD susceptibility problem without removing it.

He claims 'any ESD experts will tell you to place this inductor' and wants
me to try and find another solution to the problem. But I think the inductor
is making the situation worse by coupling the ESD spike onto the ground
plane.

Can anyone offer some theory to back up either argument?

Ian.
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