Do I need to install anything?

No. It runs in any modern browser, free, with no account required.

For K-12 Students · Antenna Pattern

Antenna Pattern for an EMI filter

Built for k-12 students learning it in middle or high school. Watch the idea come alive with plain-language steps and everyday examples — perfect for projects and homework. Simulate an EMI filter live below — adjust the inputs and watch it respond, right in your browser.

Antenna Radiation PatternLive

dipole directivity

Controls

Presets

Dipole length (wavelengths)

A dipole radiates most strongly broadside and nulls off its ends. As it grows past one wavelength the main lobe narrows and side lobes appear — trading a wider beam for more directivity. Educational tool.

▶ Run in Python

Data Inspector

Length0.50 λ

Relative directivity3.0 dB

Patternsingle broadside lobe

Governing equation

E (θ) = \frac{cos ( π L cos θ ) - cos ( π L )}{sin θ}, L = 0.50 λ

Reading this result: The half-wave dipole is the sweet spot: a single clean broadside lobe with the classic ~2.15 dBi gain and no side lobes to waste power.

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

or unlock everything with Pro →

Also for:Students Researchers Educators Engineers Hobbyists & Makers First Responders General version →

More with Antenna Pattern

Antenna Pattern for an RLC circuit Antenna Pattern for a power supply Antenna Pattern for a transformer Antenna Pattern for a DC motor Antenna Pattern for an op-amp filter Antenna Pattern for an antenna Antenna Pattern for a transmission line Antenna Pattern for a PCB trace

Frequently asked questions

Is this good for k-12 students?: Yes — this version of "Antenna Pattern for an EMI filter" is framed for k-12 students learning it in middle or high school. Watch the idea come alive with plain-language steps and everyday examples — perfect for projects and homework.
Do I need to install anything?: No. It runs in any modern browser, free, with no account required.