|}
The design variables in this problem include the side dimensions of the square patch radiator, length and width of the coupling slot and the length of the open microstrip stubextended beyond the coupling slot. The width of the mircostrip feed line is 4chosen to be w<sub>f</sub> = 2.6mm, which gives 4mm to yield a characteristic impedance of Z<sub>0</sub> = 50Ω.
{| class="wikitable"
|-
| patch_len
| 3739.1mm 5mm
|-
| slot_len
|-
| stub_len
| 23.5mm 21mm
|}