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Re: RF 50 ohm PCB trace width
Hi, the antenna is not the feed. If the feed is still designed and for instance at GPS 1575.42MHz for a ceramic patch. Then the patch will be fine. I see no issues here providing the design of the feed is correct. It's very common for patches to be placed on Fr4.
Re: RF 50 ohm PCB trace width
Hi, fr4 is fine upto 6GHz. I have implemented many antennas on standard fr4 with minimal loss and dual WiFi antenna with efficiency upto 70/80%.
Re: RF 50 ohm PCB trace width
Hi, For the PCB thickness you have this is correct the microstrip will be wide. You can should reduce this to a thinner PCB such as 0.8mm. This will equate to about 1.4mm for 50ohm trace. Hope this helps...
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