Tools
RF calculators.
Each one shows its equations, variables, a worked example and sources. They run in your browser; nothing you enter is sent to us.
Calculators
All calculators.
Antennas
Antenna Design
Dimensions for a half-wave dipole, quarter-wave monopole or microstrip patch. Pick the antenna from the list.
Horn Antenna
Optimum horn dimensions for a target gain from a standard waveguide, or the gain of an aperture.
Dish Antenna
Gain, beamwidth, effective aperture and pattern for a parabolic reflector.
Transmission Lines
Coax Impedance
Z₀, capacitance, inductance and cutoff for coaxial line, or the diameter for a target impedance.
Microstrip
Z₀ and effective permittivity for a microstrip trace, or the width for a target impedance.
Waveguide
Cutoff frequencies, mode map and propagation data for rectangular and circular waveguide, with WR sizes.
Quarter-Wave Transformer
Section impedances and lengths for a single or binomial multi-section match, with bandwidth and a VSWR sweep.
Skin Depth
Skin depth, surface resistance and RF wire resistance for copper, silver, gold, aluminum and other conductors.
Links
Link Budget
EIRP, path loss, received power, margin and range from your radio and antenna numbers.
Noise Figure
Friis cascade noise figure, gain, noise temperature and minimum detectable signal for a receive chain.
Polarization Loss
Loss between two antennas from axial ratio, sense and tilt: linear, circular or elliptical.
General
Unit Converter
dBm, watts, dBµV, volts, V/m, power density, frequency and wavelength. Type in any box.
VSWR
Convert between VSWR, return loss, |Γ|, mismatch loss and reflected power, or start from a load impedance.
Cable Loss
Loss for LMR and RG cables at any frequency and length, with connectors and delivered power.
Have a requirement? Send us the numbers.