Patch Antenna Diagnostics

Status

These files are for diagnosis, not a validated patch-antenna result. Do not cite the plotted S11 dip, field pattern, resonance label, match, Q, or convergence as RF evidence.

Not an RF reference

The artifact-generating port configuration does not pass the current preflight: the wire-port midpoint overlaps PEC, the feed is reported in PEC, the conductor and feed gap are under-resolved, and the generator bypassed those findings with skip_preflight=True. A finite S11 array or an AD/FD agreement does not repair that physical setup.

What the files show

The bundle records a finite-ground FR4 patch geometry, a one-port frequency sweep, field visualizations, Touchstone export, and a material-permittivity AD/finite-difference comparison. The assets are retained to inspect file formats and plotting behavior:

• geometry.png — rendered geometry from the artifact setup;
• field_resonance.png and field_anim.gif — field visualizations from a separate soft-source run;
• s11_db.png, sparams.json, and sparams.s1p — output from the port setup that fails current preflight;
• autodiff.png and gradient.json — internal derivative consistency for that same numerical objective.

The soft-source field run and the port sweep are separate simulations. Their images do not establish that a return-loss dip and a ring-down mode came from one self-consistent run. No committed mesh and absorber convergence study supports the displayed frequency.

Diagnostic Touchstone file Machine-readable output from the port setup that fails current preflight; not a calibrated RF reference.

Interpreting the AD/FD panel

The stored AD and central finite-difference values agree for the implemented objective. This checks differentiation of that computation only. Because the port geometry fails current preflight, the derivative must not be described as patch sensitivity, matching sensitivity, or an antenna-design gradient.

Use a supported path

• Your First Patch Antenna gives a model that passes preflight and separates a short execution check from RF evidence.
• From a source checkout, validation/crossval/05_patch_antenna.py runs the repository’s separate rfx/OpenEMS comparison. Its result applies only to the script’s own geometry, mesh, metric, band, and tolerances; it does not reproduce this gallery bundle.
• Cross-Validation and Accuracy defines the evidence required before publishing resonance, S-parameter, or Q claims.