The impedance at the input end of a transmission line, if it's loaded with a complex impedance at the output, which is most often the case in antenna designing, is also a complex value. This calculator allows you to calculate the input impedance of a transmission line, as well as the VSWR, return loss, and mismatch loss at the input point. It's assumed that the source impedance is also complex. In addition, the calculation takes into account the effect of signal attenuation in the transmission line. Previously, such hard calculations could only be done using the Smith chart.
Javascript source code:
Copyright ©2015 - 2023 3G-Aerial
Limitations and features of antenna calculations
Calculation formulas:
Losses in a coaxial cable depend on its type and frequency. You can determine the specific attenuation per unit length of common coaxial cables types at operating frequency using our online calculator. In the calculator, you should select the length of 1 meter (or 100 ft.) and the VSWR = 1.
Related links:
- Calculate VSWR and Return Loss from Zload (or Yload or S11) and Zo - Owen Duffy, VK2OMD ex VK1OD;
- Understanding Transmission Line Input Impedance and S11;
The site has comments on social networks, which have much more opportunities for communication.