Smith chart & impedance matching
- Complex impedance, S11 and reflection
- VSWR and return-loss conversion
- L-network matching
- Stub tuners and quarter-wave transformers
RF & MICROWAVE CALCULATOR APP
RF Calculator
& Smith Chart
Impedance matching.
RF design. In one toolkit.
Work with Smith charts, antennas, transmission lines, filters, and RF system calculations on mobile and Windows.
Get the app for your device
iOS · Android · Windows
RF CALCULATIONS. A CLEARER PICTURE.
MatchCalculateExplore
A look inside RF Calculator & Smith Chart
SMITH CHART & MATCHING
From a complex load
to a matching network
Inspect impedance and reflection on the Smith chart. Compare ideal L-network solutions with component values beside the plot.
EXAMPLE SHOWN IN THE APP75 + j25 Ω → 50 Ω1 GHz · ideal L-network solutions
See the complete matching screen ↓
A LOOK INSIDE THE APP
Explore the RF workbench
Explore matching networks, Smith chart analysis, propagation, and wireless link calculations.
Smith chart & L-network matching
Matching solutions, component values, and an impedance plot together.
Stub tuner & physical layout
See stub length, placement, normalized values, and the match on a Smith chart.
Pi-network matching design
Set source and load resistance, frequency, response, and target Q to calculate a matching network.
Matching network on the Smith chart
Inspect calculated component values and follow the impedance transformation through the network.
Impedance, reflection & VSWR
Enter a complex load and line length to inspect reflection coefficient, return loss, VSWR, and transformed impedance.
Path loss & propagation models
Explore an Okumura–Hata example with frequency, distance, antenna heights, and environment inputs.
Friis transmission calculator
Calculate received power from transmitter power, antenna gains, frequency, and distance.
RF system & microwave tools
Browse Smith chart, link budget, path loss, noise figure, and transmission-line tools.
Antennas, matching & components
Find antenna, stub tuner, inductor, RLC, and component-code calculators.
9 app screenshotsSwipe to explore · Select a screen to enlarge
WHAT THE APP COVERS
RF, antenna & microwave calculators
Explore matching, system analysis, filters, and component design.
RF systems & link analysis
- Link budget, EIRP and Friis transmission
- Free-space and Hata path loss
- Cascaded noise figure
- Radar range and power density
Antennas & transmission lines
- Yagi-Uda and microstrip patch antennas
- Antenna gain and beamwidth
- Coaxial cable and microstrip
- Rectangular and cylindrical waveguides
Filters, attenuators & RLC
- Butterworth and Chebyshev filters
- Bode plots and RLC resonance
- Pi, T and bridged-T attenuators
- Inductive and capacitive reactance
Inductors & component tools
- Air-core, multilayer, toroid and spiral inductors
- SMD resistor and capacitor codes
- Series and parallel networks
- Skin-depth calculations
RF conversions
- Power and dBm
- Frequency and wavelength
- Reflection coefficient and S11
- Impedance and VSWR
MOBILE + DESKTOP
RF calculations on your phone.
And on Windows.
Choose the App Store, Google Play, or Microsoft Store for your device.
iOSAndroidWindows
Choose your download ↑About RF Calculator & Smith Chart
Who is the app for?
RF engineers, technicians, students, and radio hobbyists working with matching, antennas, transmission lines, and RF calculations.
Can I use it on mobile and Windows?
Download from the App Store for iOS, Google Play for Android, or Microsoft Store for Windows. See each listing for current compatibility, pricing, and features.
What does the Smith chart screen show?
The supplied screenshot shows complex load impedance, normalized values, ideal L-network matching solutions, and an impedance transformation plot.
Keep your RF toolkit close.
Get RF Calculator & Smith Chart for your device.