Wire Wound Inductor for Rx matching
One day I replaced it by MLCC type inductor and I found BER got worse.
Today I saw a design using MLCC type inductor for Rx matching.
I thought I can improve BER by using wire wound type inductor but I got
worse BER after I replaced it by wirewound type inductor.
Could someone advise why sometimes we use wire wound type inductor for
Rx band matching and why sometimes we use MLCC type inductor.
Thanks for your kindly help.
What kind of RX band matching? Frequency? Type of circuit? Low noise amplifier or what?
Generally, it's important to keep accurate track of the Q-value of the inductors used in RF circuits. And to do analysis of the impact reduced Q-value will have on performance. Modelling your RF circuit using ADS, Microwave Office, Genesys or any similar analysis program, together with representative models of the different inductor candidates used, will give the answer.
Air wound inductors has higher Q than MLCC.
But in the same time the decreasing of BER could be just due to a mismatch of the circuit introduced by the MLCC inductor, which has different parasitics.
Try to re-match the entire circuit using only MLCC and is possible to get the same good BER.