Closed-form RF calculators for the geometries you use every day.
Twelve calculators covering microstrip, stripline, patch antennas, inverted-F antennas, CPW, GCPW, differential pairs, wavelength, quarter-wave matching, and Smith chart conversions. Each has its own page with the math, references, and a starting-point geometry. When you need real S-parameters on your actual stackup, open the design in RayRF.
Microstrip
Trace impedance and width on a top-layer microstrip.
Stripline
Symmetric inner-layer trace between two ground planes.
Patch antenna
Rectangular microstrip patch dimensions and edge resistance.
Inverted-F antenna
PCB IFA: arm length, feed offset, cutout and ground starting points.
CPW
Coplanar waveguide on a dielectric, no bottom ground.
GCPW
Grounded coplanar waveguide. CPW with a backside ground.
Differential pair
Edge-coupled microstrip differential pair Zdiff.
Embedded microstrip
Microstrip with a cover dielectric (soldermask, prepreg).
Free-space wavelength
Convert frequency to wavelength in vacuum or air.
Wavelength in dielectric
Guided wavelength in bulk dielectric or microstrip.
Quarter-wave transformer
lambda_g/4 matching section between two impedances.
Smith chart
Z to S11, VSWR, return loss, mismatch loss.
Closed-form is just the start.
These calculators hand you the analytical starting point. RayRF takes you the rest of the way: antennas, filters, feedlines, and more, simulated on your real stackup with copper losses, dielectric loss, and finite ground. Roughly a second per iteration.