A microstrip patch antenna consists of a flat rectangular (or circular) conductive patch on a dielectric substrate (circuit board material), with a ground plane on the opposite side.
[ L = \fracc2f\sqrt\varepsilon_reff - 2\Delta L ] patch antenna calculator
[ \frac\Delta Lh = 0.412 \frac(\varepsilon_reff + 0.3)(W/h + 0.264)(\varepsilon_reff - 0.258)(W/h + 0.8) ] A microstrip patch antenna consists of a flat
[ \varepsilon_reff = \frac\varepsilon_r + 12 + \frac\varepsilon_r - 12\left(1 + \frac12hW\right)^-1/2 ] patch antenna calculator