| ??? 03/14/11 17:49 Read: times |
#181583 - PCB layout issue Responding to: ???'s previous message |
I isolated ground plane of WIFI from the rest of the circuit ground plane and made it connect to a star point under the GPS module with a wire, and horray!! GPS started working producing valid position fix. But unfortunately with degraded accuracy, for when WIFI is off I get same position all the time when I'm standing still, with excellent accuracy.
Tomorrow I will isolate the GPS solid ground plane from the digital ground plane and hope this will fix the problem. I will also play with WIFI external antenna and add more decoupling capacitors 1nF, 100nF, 4.7uF on parallel. I'm using switching regulator LM2576S-3.3 is this good enough or should I experiment with linear regulator? Mahmood |
| Topic | Author | Date |
| GPS wifi interference problems | 01/01/70 00:00 | |
| Multi-Antenna Positioning | 01/01/70 00:00 | |
| External antenna | 01/01/70 00:00 | |
| I guess... | 01/01/70 00:00 | |
| RF voodoo magic | 01/01/70 00:00 | |
| PCB layout issue | 01/01/70 00:00 | |
| External GPS Antenna?? | 01/01/70 00:00 | |
| Only internal | 01/01/70 00:00 | |
| may not be (just) intereference between antennas... | 01/01/70 00:00 | |
| Multi Antenna Cables / Post Filtering | 01/01/70 00:00 | |
good news | 01/01/70 00:00 |