FreeLists / si-list / [SI-LIST] Tech Tidbit - close range EMI

[Doug Smith <doug@xxxxxxxxxx>]

Hi All,

It is the beginning of the month again and I have been busy writing. 
This month's Technical Tidbit discusses EMI induced into a simulated 
mobile phone antenna. Significant voltages can be induced into the 
antenna in response to small metal ESD events such as jingling change 
when the antenna is immersed with the ESD events, such as in a pocket 
or purse.

Abstract: ESD events between small pieces of metal, such as coins, at 
low voltages produce intense EMI with bandwidths into the tens of 
gigahertz. The problem is much worse when an electronic device, such 
as a mobile phone, is immersed in the coins as often happens.  Data is 
presented to show possible voltages induced into a mobile phone 
antenna by nearby small metal ESD events. RF front end damage to the 
receiver is a distinct possibility. (even though there is no direct 
contact with the ESD events)

I have started a companion, subscription based, website to emcesd.com 
at http://emcesd-p.com .  Comments welcome.

Doug
-- 
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     ___          _       Doug Smith
      \          / )      P.O. Box 1457
       =========          Los Gatos, CA 95031-1457
    _ / \     / \ _       TEL/FAX: 408-356-4186/358-3799
  /  /\  \ ] /  /\  \     Mobile:  408-858-4528
|  q-----( )  |  o  |    Email:   doug@xxxxxxxxxx
  \ _ /    ]    \ _ /     Website: http://www.dsmith.org
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