Line Length                  Calculate the electrical or physical length of a transmission                  line given its dielectric constant (Er), frequency, and length in                  either degrees or inches.                  Units:  MHz,degrees,inches                  Enter Elec. or Phys. length (E/P) [<Enter>=Quit] ? _

Let's try a few simple conversions. Suppose you had a stripline stub at 4 GHz; its on Teflon (Er=2.5), and it is 0.233 in. long. What is its electrical length?

Here is the output calculation

                Theta = 45.022 degrees

Now let's try it another way. You need a quarter-wave stub on microstrip. The effective relative dielectric constant, Er', obtained from our MStrip+ program, is 6.7, and the frequency is 2735 MHz. How long should the line be?

Here is the output calculation

                Length = 0.416 inches  (416 mils)