| Kai Klaas 11/24/11 12:02 Read: 139 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 |
| Topic | Author | Date |
| 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 |