Transmission Line Calc
iPhone Software to Analyze RF Transmission Lines
Transmission Line Calc allows you to perform several calculations related to RF
After selecting from one of 29 different transmission lines, you specify the length and
operating frequency. The characteristic impedance and velocity factor of the cable is
displayed, and the attenuation (loss) as well as electrical length (in wavelengths and
degrees) is displayed.
Next, you can specify the impedance (both resistive and reactive) and whether this is
measured at the input to the transmission line or the load. The impedance at the other end
of the transmission line is calculated, as well as the SWR (Standing Wave Ratio) for both
The loss due to the SWR is then calculated and displayed, as well as the total loss.
Next, you can enter in the input power, and the loss due to the cable as well as SWR is
displayed, as well as the net power out.
29 different commonly used transmission lines are available for selection.
Belden 8215 (RG-6A)
Belden 8237 (RG-8)
Belden 9913 (RG-8)
Belden 9258 (RG-8X)
Belden 8213 (RG-11)
Belden 8261 (RG-11A)
Belden 8240 (RG-58)
Belden 9201 (RG-58)
Belden 8219 (RG-58A)
Belden 8259 (RG-58C)
Belden 8212 (RG-59)
Belden 8263 (RG-59B)
Belden 9269 (RG-62A)
Belden 83241 (RG-141A)
Belden 8216 (RG-174)
Belden 8267 (RG-213)
Davis RF Bury-Flex
300 ohm Tubular
450 ohm Window
600 ohm Open
Andrew Heliax LDF4-50A
Andrew Heliax LDF5-50A
Andrew Heliax LDF6-50A
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