#### cooleyn

##### Member level 1

**broadband matching ads**

First of all, bode-fano rule should be investigated that to what extent we can do for this broadband matching. The reflection coefficient should meet : |Tao|min=exp(-pi*Q0/Qs). In your case, assume 10%

bandwidth achieve for matching, Q0=10, For RLC series source impedance, Qs=sqrt(L/C)/R ~=40.

so |Tao|min=exp(-pi*Q0/Qs)=0.456, in log field, |Tao|(dB)>=-6.82, so for -10dB return loss task is impossible. For 5% matching bandwdith, |Tao|(dB)>=-13dB, which is reasonable for implement. For broadband matching , you can try

Genesys matching synthesis tool which is a good tool

for automatic matching.