How do I simulate an antenna?

Open this page and use the live AM / FM Modulation tool below — set your inputs and the simulation runs instantly in your browser using real numerics. No install, no account needed.

Yes. The simulation runs free in your browser. A one-time unlock or a Pro plan adds advanced parameters, saved presets, data import, and clean exports.

Can I use my own numbers?

Absolutely — every input is adjustable, and with data import you can drive an antenna from your own measurements.

Use case · powered by AM / FM Modulation

AM / FM Modulation for an antenna

Simulate an antenna live in your browser. This runs the real AM / FM Modulation solver — adjust the inputs, watch it respond instantly, and export the result. No install, no account.

For:Students Researchers Educators Engineers Hobbyists & Makers K-12 Students First Responders

AM / FM ModulationLive

how radio carries sound

Controls

Presets

Modulation

Carrier frequency

Message frequency

Modulation index

Radio hides a low-frequency message inside a high-frequency carrier. AM varies the carrier's amplitude with the message; FM varies its frequency. FM resists noise better, which is why music stations use it. Educational tool.

▶ Run in Python

Data Inspector

ModeAmplitude (AM)

Carrier / message20 / 2

Modulation index0.70

Modulation depth70%

Governing equation

s (t) = (1 + 0.70 cos (2 π \cdot 2 t)) cos (2 π \cdot 20 t)

Reading this result: AM varies the carrier's amplitude with the 2 Hz message at 70% depth. The envelope stays positive, so a simple envelope detector recovers the message cleanly. The 20 Hz carrier is far above the message so the two separate at the receiver.

Runs locally in your browser — free forever. Scale to the cloud when reality gets heavy.

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About this simulation

The full AM / FM Modulation tool models an antenna with the same numerics engineers and scientists use — running entirely client-side. Change any parameter and the result updates in real time, so you can build intuition, check a design, or teach the concept without spreadsheets or installs.

More you can do with AM / FM Modulation

AM / FM Modulation for an RLC circuit AM / FM Modulation for a power supply AM / FM Modulation for a transformer AM / FM Modulation for a DC motor AM / FM Modulation for an op-amp filter AM / FM Modulation for a transmission line AM / FM Modulation for a PCB trace AM / FM Modulation for a battery pack

Other ways to simulate an antenna

Fourier Transform for an antenna Bode Plot for an antenna Filter Designer for an antenna PID Controller for an antenna Transmission Line for an antenna Op-Amp Circuits for an antenna

Frequently asked questions

How do I simulate an antenna?: Open this page and use the live AM / FM Modulation tool below — set your inputs and the simulation runs instantly in your browser using real numerics. No install, no account needed.
Is it free?: Yes. The simulation runs free in your browser. A one-time unlock or a Pro plan adds advanced parameters, saved presets, data import, and clean exports.
Can I use my own numbers?: Absolutely — every input is adjustable, and with data import you can drive an antenna from your own measurements.