About Antenna Tester
Practical RF calculators for antenna design decisions.
Antenna Tester is a focused engineering toolkit for antenna dimensions, wavelength, gain, impedance, and RF planning calculations. It is designed for students, HAM operators, wireless builders, and engineers who need fast, readable math while prototyping.
39+
Calculator modules
6
RF categories
Free
Access
Reference-first formulas
Core calculators follow standard RF and antenna design equations, with practical notes where a result is an approximation.
Built for quick checks
The tools are shaped for day-to-day design work: frequency planning, antenna sizing, impedance estimates, and link-budget sanity checks.
Transparent results
Inputs, units, formulas, and outputs stay visible so engineers and learners can verify the math instead of trusting a black box.
What this site is best for
Antenna length estimates before cutting wire or PCB copper.
Comparing wavelength, gain, and aperture relationships across bands.
Checking microstrip patch dimensions with effective dielectric correction.
Learning how common RF formulas respond to frequency and geometry changes.