Hi,
the theory is evident. I didn't reflect on the difference between the simulation and the original specification of the frequency in my image. I thought of the ideal characteristics of the simulation and why it does not work with this modulation.
Is it possible to assign the induction separate to the leads or do I have to integrate inductors to every single lead?
Thanks,
CV
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--- In LTspice@..., "Helmut" <helmutsennewald@...> wrote:
Hello,
Every component has a two or more leads. Even if you make it as
short as possible, you will always have more than 1nH on every
lead.
Also one shouldn't forget the capacitance of every device to the
ground plane if there is one.
Best regards,
Helmut
--- In LTspice@..., "christianvierck" <christianvierck@> wrote:
@Helmut: I'm not sure how to allocate the inductions to the seperate pins. But I will find out how to manage it.
@andy:If I change the details on the bb105 diode it does not change the frequency at the antenna. I have splitted the coil into two parts and calculated the induction of both parts separate. When I increase the induction of the coil with two rounds the frequeny decreases.
I will test the silver wire as a inductor now.
Thank you.
--- In LTspice@..., Andy <Andrew.Ingraham@> wrote:
I think the frequency is determined by the first stage, with the BB105 and
the 25 mm long wire.
The coil L is in the second stage which is an RF amplifier and shouldn't
change the frequency (or am I mistaken?).
The silver or silvered wire is puzzling. I guess the precise 25 mm length
is to make an inductor, and the designer must have thought that it needs
very low RF (skin effect) resistance, to get large Q. You would not see
that effect unless you include skin effect resistance in your simulation.
Andy
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