Hi,

I have to measure the real part of my LC. My goal is to determine the load resistance of the LC then i can take this same value for the source (matching).

My voltage source is a feed. My question is:

What for a resistance for my voltage source?

I don't want to measure the resistance of the LC and the resistance of my voltage source in parallel...

Thanks in advance

Best regards

BS

I have to measure the real part of my LC. My goal is to determine the load resistance of the LC then i can take this same value for the source (matching).

My voltage source is a feed. My question is:

What for a resistance for my voltage source?

I don't want to measure the resistance of the LC and the resistance of my voltage source in parallel...

Thanks in advance

Best regards

BS

Are you measuring the LC of the helix? If so there are two options:

1. Put the helix and its housing in EMPro eigenmode solver. LC = 1 / (2 pi f0)^2, where f0 is the first resonant frequency. No excitation is needed.

2. Put a 50-Ohm port at each end of the helix, if both ends are not grounded. Obtain the 2x2 S matrix result. Transform S matrix to Y matrix and Z matrix. From Y11 you could get loop L. From Z11 you could get C to ground. Depending on how you interpret the helix to a circuit topology, the calculation could be different. Since we transformed S to Y and Z matrices, the excitation resistance would be eliminated.

Martin

Edited by: myuan on May 23, 2013 9:29 AM