STEM

The science behind the radio.

Use Amateur Radio as a practical laboratory for science, technology, engineering and mathematics. Start in plain language, then go deeper when you are ready.

Science

Waves, electromagnetism, atmosphere, space weather, propagation, sound and energy.

PLANNED

Technology

Radios, SDR, computers, digital communication, satellites and signal processing.

PLANNED

Engineering

Circuits, antennas, impedance, resonance, measurement and construction.

Explore Antennas →

Mathematics

Ratios, units, wavelength, Ohm's law, logarithms, geometry and graphs.

PLANNED

Crossing the boundaries

Real radio problems rarely belong to only one subject.

A dipole can involve physics, electrical engineering, mathematics, materials, measurement and real-world installation.

LIVE

Frequency, Wavelength & the Half-Wave Dipole

This lesson crosses Science, Engineering and Mathematics and connects directly to an Amateur Radio antenna.

Open lesson

Technician foundations first

Electricity & Electronics

Work through these in order or open whichever one you want to review. They are built as a foundation for Technician study, but the same ideas continue into General and Extra.