Hi,
I am using the Arduino shield from DFRobot with the SIM7000E module
Now, I am designing a new PCB with sim7000E with 2 antenna connectors like the shield.
I need to know how design the RF Trace (from sim7000 to connector of LTE and GNSS)
I understand: impedance caracteristic is 50ohms (grounded coplanar waveguide) in the shield
I have measured from the shield:
RF trace 7.4mil
Gap from gnd 14.8mil
Then, if the board specification is:
-Two layers
-FR-4 (dielectric material= 4.6), (Not sure)
-thick board : 62mil
-copper thick :1.38mil
The calculator of coplanar waveguide give 100ohms
I have also the shield of botletics for sim7000E, and for measured distances:
RF trace 89mil
Gap from gnd 7mil
Then, if the board specification is:
-Two layers
-FR-4 (dielectric material= 4.6), (Not sure)
-thick board : 62mil
-copper thick :1.38mil
The calculator of coplanar waveguide give 36ohms**
Thanks
