Learn RF

Pick a topic and start exploring. No sign-ups, no tracking — just learn at your own pace.

Antennas

Antenna characteristics, 12 types, direction finding & dynamic range

Signals & FFT

See sound become math - time to frequency transformation

Smith Chart

The engineer's secret weapon for impedance matching

Decibels

Why RF engineers use weird logarithmic units

Phased Arrays

Steer radio beams without moving anything

EM Fundamentals

Sine waves, the EM spectrum, bandwidth, and the Doppler effect

Modulation

How information rides on radio waves — AM, FM, and digital

RF Propagation

How signals travel — ground wave, sky wave, line of sight

RF Bands & Usage

ITU frequency bands, satellite allocations, and spectrum explorer

Try the Labs

Guided Experiments

Virtual Lab

Step-by-step RF experiments with live simulations

Mystery Game

RF Detective

Solve RF mysteries using clues and signal analysis

Spectrum Explorer

Spectrum Scroll

Navigate the electromagnetic spectrum from ELF to optical

Modulation Kitchen

Signal Chef

Mix your voice with carrier waves to create AM and FM signals

Coverage Explorer

Antenna Playground

Place antennas on a field and watch coverage patterns form

Frequency Mixer

Wave Kitchen

Mix frequencies and watch interference patterns emerge

RF History

Radio Time Machine

Travel through 130+ years of radio technology

System Analysis

RF Chain Simulator

Build signal paths from transmitter to receiver

Ear Training

Noise Floor Challenge

Decode Morse code hidden in static at dropping SNR

Spectrum Analysis

SDR Waterfall

Visualize RF energy across frequency and time

Digital Comms

RF Transmitter Builder

Build a complete TX/RX chain block by block. Watch your message transform from bits to radio waves through oscillators, mixers, filters, and amplifiers.

Link Budget

Link Budget LEGO

Drag and drop transmitters, cables, amplifiers, and antennas to build an RF link and see signal power change

All interactive demos run in your browser. Nothing is saved.