Solving for inset depth (y_0) from the edge:
// Calculate inset depth y0 (same unit as L) let ratio = Zfeed / Redge; let sqrtRatio = Math.sqrt(ratio); // arccos input must be <=1 (already ensured by Zfeed ≤ Redge) let acosVal = Math.acos(sqrtRatio); let y0 = (L / Math.PI) * acosVal; inset feed calculator
<button onclick="calculateInset()">Calculate Inset Depth (y₀)</button> Solving for inset depth (y_0) from the edge:
For a rectangular patch antenna with an inset feed: let sqrtRatio = Math.sqrt(ratio)
<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>
[ y_0 = \fracL\pi \cdot \cos^-1\left( \sqrt \fracZ_feedR_edge \right) ]