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Simulate at the
speed of thought.

RayRF is a full-GUI electromagnetics simulator for RF PCB design. Edit the geometry and S-parameters, Smith chart, radiation pattern, and 3D fields update in seconds. Runs locally on your GPU or CPU.

Windows and Linux, no card required.

openEMS in 4 days.
RayRF in 35 minutes.

Measured throughput on an 82.8M-cell patch antenna mesh for 1,000,000 timesteps.

Cell updates per second, wider bar is faster
82.8M-cell mesh, 1,000,000 timesteps
RayRF GPU
RTX 5090
39,600 MCell/s - 173.7x FASTER39600MCps, 173.7x faster
34 m 51 s
RayRF CPU
Ryzen 9 9950X, DDR5 6000, 32 threads
4,620 MCell/s - 20.3x FASTER4620MCps, 20.3x faster
4 h 59 m
openEMS
Ryzen 9 9950X, DDR5 6000, 32 threads (baseline)
228 MCell/s228MCps
4 d 5 h
CST / HFSS
Legacy commercial, $10-50K/yr
not benchmarkednot benchmarked
N/A
LIVE EDITOR
~1 s
preview update on edits in live mode with a typical high-end GPU for most typical-Q cases
High resolution validation run
34 m 51 s
5.8GHz patch antenna, 1,000,000 steps, 82.8M cells, RTX 5090
NO GPU?
4 h 59 m
CPU benchmark runtime, still 20.3x openEMS on the same CPU
AUTO SETTINGS
zero setup
mesh resolution, in-board refinement, boundary conditions, air margins, all automatic based on a single quality preset choice from Low to Very High.

A solver so fast you can iterate live.

Enable Live Mode and the solver runs continuously as you edit geometry. Drag a patch edge and the S-parameters, Smith chart, and 3D radiation pattern all update in around a second at draft quality.

Hardware validated with a VNA. Every resonance within 1%.

Custom fabricated patch antennas and a coupled resonance bandpass filter measured on a calibrated VNA vs RayRF simulated on the exact geometry. All resonances within 1%.

Calibrated LiteVNA64 in hand, sweeping one of the RayRF validation PCBs
33.544.5540-5-10-15-20-25Frequency (GHz)|S11| (dB)
PA-08 First ResonanceOne example from the validation suite.
Measured (VNA)RayRF (sim)

See the fields, 2D, 3D, and Radiation.

Fully integrated viewers for surface currents, volumetric fields, and 3D radiation patterns. Export to CSV, PNG, or Touchstone.

Surface currents on a coupled-resonator filter.
Visualize the passband frequency traverse the structure as each resonator excites.
3D radiation pattern.
Slice per-frequency, 2D polar and 3D patterns.
Full 3D fields.
Full field evolution in time, for the entire domain. Understand where resonant energy lives, how it transfers between geometric components, and make informed design decisions based on the actual physics.

A modern editor that saves you time.

Straightforward layer-based 2.5D editor with standard controls from PCB design software like Altium and KiCad. Parametric geometry and scriptable shapes let you define any PCB-like structure with ease. Cloners, constraints, and Mesh Preview further accelerate design.

RayRF 2D editor: stackup, primitives, and properties on one canvas
Stackup and Geometry together.
Stackup, tools, and primitive list on the left, viewport in the middle, properties on the right. A single visual canvas instead of scattered config files.
RayRF RF Calculators panel: eleven RF calculators in tabs with microstrip patch sizing and top + side view diagrams
Built-in RF calculators.
Patch antenna, microstrip, and 9 more closed-form calculators included. Size traces and elements without switching windows.
RayRF Simulate page: center frequency, bandwidth, and auto mesh quality with an energy ringdown plot
Sensible defaults for every setting.
Set the frequency range and quality preset, RayRF automatically scales the air box and PML, refines the mesh inside the board, and stops when sim energy rings out. Advanced mode gives full control when you need it.
Auto-meshing preview: Yee grid on patch antenna
Auto-meshing with an interactive preview.
Mesh Preview lets you see how the auto-mesher discretized the geometry. Never a black-box, always transparent settings with an option to copy the auto derived settings to advanced mode for granular control.
RayRF S-parameters view: S11 magnitude plot beside a Smith chart with linked markers
S-parameters and Smith Chart.
S11/S21/Sxy magnitude, Smith Chart, and markers that track custom criteria. Interpret matching, bandwidth, and impedance behavior in one place.
Enable Live Mode and edits update the results in seconds.
Tune a patch edge and S11, the Smith Chart, and 3D radiation patterns all re-solve and update in realtime.

Priced for individuals.

Commercial 3D EM tools (CST, HFSS) are priced in the $10,000 to $50,000 per year range, with a required sales call. RayRF starts at $17 per month on the annual plan, $29 monthly. No sales call, just download.

Hobby
For students and hobbyists.
$17/ monthsave 43%
Billed annually at $199/year.
or $29/month billed monthly
  • Non-commercial use only
  • Full CPU and GPU solvers, same speed as Pro
  • Live Mode preview, auto-mesh, convergence study
  • All built-in RF structure calculators
  • CSV + PNG export
  • Touchstone (.s2p / .sNp) export
  • Programmatic CLI and headless operation
  • Up to 2 ports, 2-layer stackups
  • Activate on 1 machine at a time
Pro
For consultants and professional engineers.
$125/ monthsave 37%
Billed annually at $1,499/year.
or $199/month billed monthly
  • Commercial use licensed
  • Full CPU and GPU solvers
  • Unlimited ports, unlimited layers
  • Touchstone (.s2p / .sNp) export
  • Programmatic CLI and headless operation
  • Activate on 2 machines at a time
  • Priority email support
Founding Member
$1,999 one-time. Own Pro forever.
Every update, every version, paid once. Full Pro features, including activation on 2 machines. Limited to the first 50 subscribers.

Stop waiting for your simulator.
Start designing at the speed of thought.