Posts: 3
Registered: ‎08-20-2015

Replacement of chip Antenna with UFL connector on BLE121LR module



We are in the process of FCC certification. The certification company wants to test the module with UFL connector. In their testing they are getting a difference of 4 dBm with chip antenna and with UFL connector. 


I need some clarification on grounding connection to UFL connector. The chip antenna having two ground connections, one path is directly connected to ground and another path is connected to ground through an Inductor (or) Resistor. Which ground I need to use for UFL connector?


Is there any difference between the two grounds? We used the direct ground path in testing.