Learn RF

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

Zero to RF

New here? Follow the structured course — from “what is a wave” to complete RF systems, with labs and quizzes along the way. Progress saves in your browser.

What Is a Radio Wave?

A 3D field lab — explore electric and magnetic fields, wavelength, and polarization

Antennas

Antenna characteristics, 12 types, direction finding & dynamic range

Signals & FFT

See sound become math - time to frequency transformation

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

GPS Jamming

How GPS works, why it is so easy to jam, and how the source is hunted down

WiFi Sensing

How a router can detect motion and breathing from changes in its own signal

Prefer reading? Browse the concept notes — short, self-contained explainers for every core idea.

Try the Labs

Mystery Game

RF Detective

Solve RF mysteries using clues and signal analysis

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

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.

Antenna Measurement

Anechoic Chamber

Spin an antenna in an echo-free room and measure its radiation pattern

Radar & Doppler

Radar Mission Control

Find and track a low-observable drone using range and Doppler

All interactive demos run in your browser. Path progress is saved locally on your device only.