From that table, we can see that there is significant impedance of the cable. If we calculate the inner and the outer impedance using formula Z=R+j(XL-XC), where XL=j2pifL, and XC=j/(2pifC), L in Henry, C in Farad, f in Hertz, and pi=3.14159265358979. Calculation with the data below and using 2,100 MHz frquency, I got as below:
- Z inner=5+j2638.9 ohm, and
- Z outer=6+j1319.5 ohm.
Then my question is:
- What is the 75 ohm meaning (written at the the cable shield)?
- What is those two impedance meaning to the antenna?
- If we got data in real cable, what to do to match the impedance?
Edit: The cable was just used for C-Band parabolic antenna.