We are testing the RF board where we have seen issue at mixer out put for same I have used a jumper as an RF cable to increase the gain and flatness.
below are the issue
- Gain degrade by 6-7dB after mixer (U60) output (describe in attachment)
- Gain degrade by 6-7dB after mixer U107 output (describe in attachment)
- RF leakage at 1900MHz at one transmitter board (describe in attachment)
Kinldy suggest what is wrong in the layout Is the matching circuit transmission line is not good or the RF trace is too long.
Let us know how to improve the gain and the flatness.