buckaroo
Member level 3
Dear All,
I have a 2.4GHz CMOS RF transceiver for FCC/CE certification, the FCC result is OK, but the CE result is marginally passed, the CE certification result showed that the 4.8GHz (it is on chip VCO frequency=2*fLO) leakage power is about -50dBm, while the CE requirement is <-47dBm, so we do not have enough margin...
the leakage power@Antenna is <-60dBm, which means the reverse isolation of RX path is OK, then, where does the 4.8GHz leakge power come from(is it from the radiation of on chip VCO?)? how can we improve it? I am confused, help me, thanks very much!
BRs
Buckaroo
I have a 2.4GHz CMOS RF transceiver for FCC/CE certification, the FCC result is OK, but the CE result is marginally passed, the CE certification result showed that the 4.8GHz (it is on chip VCO frequency=2*fLO) leakage power is about -50dBm, while the CE requirement is <-47dBm, so we do not have enough margin...
the leakage power@Antenna is <-60dBm, which means the reverse isolation of RX path is OK, then, where does the 4.8GHz leakge power come from(is it from the radiation of on chip VCO?)? how can we improve it? I am confused, help me, thanks very much!
BRs
Buckaroo