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Kai Klaas
11/24/11 12:02
Read: 206 times
Germany


 
#184886 - Only 3pF...
Responding to: Mahmood Elnasser's previous message
Mahmood said:
Yes and I even used DC/DC converter to power the GPS and optoisolatd its output signal...

At 2,4GHz the impedance of typical 3pF input to output stray capacitance of opto is about 20 Ohm. This looks more like a short circuit than isolation! The same is true for your DC/DC-converter.

At 2,4GHz it's hard to truly isolate something. And, to make it even worse, everything having a "length" becomes an antenna...

Kai Klaas

List of 17 messages in thread
TopicAuthorDate
Faraday Cage      Mahmood Elnasser      11/22/11 09:59      
   Pi-filters are best...      Kai Klaas      11/22/11 10:49      
      Pi Filters      Mahmood Elnasser      11/22/11 11:29      
         Components must work at 2,4GHz...      Kai Klaas      11/24/11 05:53      
   RFI problems      Stefan KAnev      11/22/11 13:02      
      details      Mahmood Elnasser      11/22/11 14:49      
         and what is solution?      Stefan KAnev      11/22/11 15:07      
            no solution found yet      Mahmood Elnasser      11/22/11 15:19      
               Faraday cage      Per Guldmann      11/23/11 03:20      
                  Yes      Mahmood Elnasser      11/24/11 00:58      
                     Maybe Two      Michael Karas      11/24/11 10:37      
                        even more      Mahmood Elnasser      11/24/11 11:19      
                           Only 3pF...      Kai Klaas      11/24/11 12:02      
                              but only 3s      Stefan KAnev      11/24/11 14:07      
               wifi channels      Stefan KAnev      11/23/11 03:54      
                  Roving networks      Mahmood Elnasser      11/24/11 00:56      
                     which channel?      Stefan KAnev      11/24/11 01:43      

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