gorka.beaskoetxea
Newbie
Hi, I am trying to obtain the impedance (capacitance) between two metallic objects. I have one body inside another separated by 1 mm vacuum gap. The brown body is supposed to be powered and the green one grounded. I used a cable and a lumped port to introduce the excitation.
I simulated the model for a sweep of frequencies and then I calculated the impedance of the mirror to the housing with the S-parameters: Im(ππ΅) = Im(50(1 + S11/(1 β S11))), where S11 is the EM voltage wave reflection coefficient and 50 is the characteristic impedance. The result is ~-1j Ξ©.
However, if I calculate the reactance theoretically, it results in ~-2.6 Ξ©. The theoretical value was calculated considering πΆ=(Ρ·π΄)/π and ππ΅=ππΆ=1π2πππΆZ_B=X_C=1/j2ΟfC, where A=area=86834.78 mm2 and S=separation=1 mm. Ξ΅r=1 since the bodies are separated with vacuum.
Is this method correct to obtain the reactance/capacitance between two bodies?
I also attach the model here
I simulated the model for a sweep of frequencies and then I calculated the impedance of the mirror to the housing with the S-parameters: Im(ππ΅) = Im(50(1 + S11/(1 β S11))), where S11 is the EM voltage wave reflection coefficient and 50 is the characteristic impedance. The result is ~-1j Ξ©.
However, if I calculate the reactance theoretically, it results in ~-2.6 Ξ©. The theoretical value was calculated considering πΆ=(Ρ·π΄)/π and ππ΅=ππΆ=1π2πππΆZ_B=X_C=1/j2ΟfC, where A=area=86834.78 mm2 and S=separation=1 mm. Ξ΅r=1 since the bodies are separated with vacuum.
Is this method correct to obtain the reactance/capacitance between two bodies?
I also attach the model here