Tools
Design tools that run in your browser
Free, no account and nothing to install. The numbers are computed on your own device, and each tool opens in a new tab.
Filter Designer
Pick a topology, a response and an order, and get the LC ladder element values with the response plotted — then export the result to your simulator.
- Low-pass · high-pass · band-pass · band-stop
- Butterworth · Chebyshev · Bessel
- Orders 1 to 10
- Response, group delay and Smith chart views
- SPICE · Touchstone .s2p · CSV export
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Antenna Design Calculator
First-cut dimensions and performance figures for eight antenna types, with the radiation pattern drawn in 2D and 3D.
- Microstrip patch · dipole · monopole · Yagi-Uda
- Horn · slot · loop · parabolic reflector
- Interactive 2D and 3D radiation patterns
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Microstrip Line Designer
Synthesise a trace width for a target impedance, or analyse a width you already have, on common RF laminates — with a cross-section drawn to scale.
- Synthesis and analysis modes
- Z₀ · effective permittivity · guided wavelength
- Dispersion, phase and group velocity
- Conductor and dielectric loss
- Rogers, Arlon, Taconic and FR4 substrates
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Impedance Matching & Smith Chart Lab
Drag a load around an interactive Smith chart and watch reflection, VSWR and delivered power respond, then work through matching networks and stubs.
- Interactive Smith chart
- Reflection coefficient · VSWR · return loss
- L, Pi and T matching networks
- Single-stub matching calculator
- Q versus bandwidth
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These tools use closed-form design equations. They are meant for learning and for first-cut sizing — verify a design in a full-wave or circuit simulator before it goes to fabrication.