I want to design an LC resonant circuit at 841 MHz. Thre is an infinity of L-C-values-combinations that yield the desired resonant frequency and I don't like to try every possibility and see the impact on my matching circuit. So I used the Equation Editor in the "PLC"-Button (under "Lumped Components") as follows:

1) C value tunable from 1 pF to 50 pF

2) L value through equation editor L=1/(C*(Pi^2)*(841Mhz)^2) [Remember that f=1/(2*Pi*SQRT(L*C))]

Now when I simulate I don't get reasonable results. In the smith chart the point @ 841 MHz should not move when I tune C but it does.

Anyone has some experience with Equation Editor please help me.

Thanks

1) C value tunable from 1 pF to 50 pF

2) L value through equation editor L=1/(C*(Pi^2)*(841Mhz)^2) [Remember that f=1/(2*Pi*SQRT(L*C))]

Now when I simulate I don't get reasonable results. In the smith chart the point @ 841 MHz should not move when I tune C but it does.

Anyone has some experience with Equation Editor please help me.

Thanks

best regards

Henry