The microstrip calculator determines the width and length of a microstrip line for a given characteristic impedance (Zo) and electrical length or vice versa. Description. The microstrip patch antenna calculator determines the length (L) and width (W) of a rectangular microstrip patch antenna for a given resonant. *Your favorite speaking calculator is now updated with a brand new look!* Usage: To do 1+1 say: one plus one. To do say: one minus one. To do 1x1 say. I think ADS line calculator is also a good tool and easy to use. I have used calculator s, such as and And some formulas from papers on patch antenna. The radiation edge input impedance is also calculated and is based on W. The calculator does not need this for analyzing the line impedance. What formula do i use to do this?