- Electromagnetic Spectrum and Frequency AllocationsA to scale map of the electromagnetic spectrum plus a US frequency allocation chart: who uses each band, ham band plans, Wi-Fi and IoT channel tables, license rules and an FCC RF exposure calculator.ism bands
- Antenna Length CalculatorFull wave, half-wave dipole, quarter-wave vertical, and 5/8 wave antenna lengths for any frequency, plus a 3 element Yagi starter.
- Coax Cable Loss CalculatorSignal loss over a coax run by cable type, length, and frequency, with power delivered and a compare-all-cables view.cable loss chart
- dBm, Watts, and Volts ConverterConvert RF power between dBm, dBW, watts, Vrms, Vpp, and dBuV across 50, 75, or 600 ohm impedances, with a reference table.dbm converterrf power converterdbuv converter
- Fresnel Zone CalculatorFirst Fresnel zone radius, 60 percent clearance requirement, and earth bulge for a wireless link, with an optional obstacle clearance check.
- LC Resonance CalculatorResonant frequency of an LC circuit from any two of inductance, capacitance, and frequency, plus reactance, Q factor, and bandwidth.
- Path Loss and Link Budget CalculatorFree space path loss from frequency and distance, plus a full link budget from transmit power to received power and fade margin.fspl calculatorrf link budget
- VSWR and Return Loss ConverterConvert between VSWR, return loss, reflection coefficient, mismatch loss, and reflected power, with a reference table from 1.0 to 3.0 VSWR.vswr calculatorswr calculatorantenna vswr chart
- Wavelength and Frequency ConverterConvert between frequency and wavelength for any part of the spectrum, with ITU band name, photon energy, and period.