Inset Feed Calculator -

For a rectangular patch antenna with an inset feed:

[ y_0 = \fracL\pi \cdot \cos^-1\left( \sqrt \fracZ_feedR_edge \right) ] inset feed calculator

<div class="input-group"> <label>⚡ Edge resistance, R_edge (Ω)</label> <input type="number" id="redge" placeholder="e.g., 200" value="200"> <div class="hint">Typical range: 150–250 Ω (depends on width & substrate)</div> </div> For a rectangular patch antenna with an inset