Hi,
I would like to simulate the frequency response of an experimental circuit that I use but I need some help.
The circuit is composed of a tunnel junction of impedance Z=16000 Ohms that is linked to a RF electrical source (50 Ohms) through coaxial 50 Ohms wire (around 5m ).
The story is that this tunnel junction is emitting light, and when I sweep the AC voltage applied to the junction from 20MHz to 350MHz, I observe regular peak in the light intensity, spaced by 45 MHz. I think that this phenomenon is caused by mismatch impedance. The electrical power feeding the junction to emit is function of the frequency. I assume that the impedance of the junction isn't constant because of its IV caracteristic, but a constant impedance could be a good begining.
I would like to confirm my interpretation with a simulation but I don't know how to simulate this. I tried but it difficult for me to observe the result with WaveForm.
the project link that I did: https://easyeda.com/mickael.buret2121/tunnel-junction_simu
Result from APD measurements (peaks maybe due to the non linear response of the tunnel junction because of the IV caracteristic)
@Mickaël BURET,
I think I understand your problem and you seem to have correctly created a basic simulation that is a good starting point.
EasyEDA is OK for many basic AC analysis simulations but it is limited because Waveform is not very good at letting you explore Bode plots.
You may be better to try to do this in LTspice:
https://www.analog.com/en/design-center/design-tools-and-calculators/ltspice-simulator.html
Does your tunnel junction behave like an Esaki tunnel diode? Somewhere either in EasyEDA or LTSpice (I think the model will run in EasyEDA/ngspice) I have a simulation of a tunnel diode that I will try to find for you if you think it will help?
If you can upload some pictures of your test jig that may help in building the simulation.
:)