A field guide to RF engineering

Turn your curiosity into RF expertise.

Develop the skills to analyse, design and test RF circuits and systems through interactive models and worked engineering examples.

  • Build physical intuition
  • Connect fundamentals to systems
  • Learn at your own pace
  • Earn a certificate

Learn by exploring.

As you learn, interactive explorers help you connect RF theory with how circuits and systems behave. Try this example: adjust a parameter and see its effect.

Antenna radiation

Change the antenna length to explore its radiation pattern.

Learn by exploring. Change the dipole length to see how its radiation pattern changes.

Dipole radiation patternFar-field power pattern of an ideal center-fed thin-wire dipole with sinusoidal current. Distance from the center represents relative power, normalized to each pattern’s maximum. Changing the length can create additional lobes and nulls. The wire is schematic and uses a separate scale. The optional rotation changes only the viewing angle.
0.10 λ

Ideal dipole. Length in wavelengths (λ); power normalized to each pattern’s peak.

About this model

Ideal thin wire, fed at its center in free space, with a sinusoidal current distribution. Length is the total tip-to-tip length in wavelengths (λ). The surface shows relative radiated power, normalized separately at each length. It does not compare absolute power, gain, efficiency, or impedance. The wire is schematic and uses a separate scale from the power surface.

Dipole model derivation (PDF) (opens in a new tab)

About RF Journey

Built from
engineering practice.

I’m Ricardo Pereira, an RF Design and Certification Engineer. I’m building RF Journey to connect physical intuition with the calculations, measurements, and design decisions engineers use in practice.