We are using S2-LP Transceiver to wireless products of us. Our custom board has 2 layer and 1.6mm thickness and our operating frequency(OP) is 868 MHz. Also our output power is 14dBm
Unfortunately we failed "Unwanted Emission in Spurious Domain" test. In shortly to this test, measures harmonics. We got problem 2nd harmonics and 5th harmonics. We tryed too many filter but we can not reduce harmonics.
So we changed our PCB. We went to 4 layer PCB and we updated filter and matching circuit. We need someone to review our PCB. Can someone help me please.
Thank you and have a nice day.
