Tools

RF link budget: TX power, antenna gains, path loss → received power & margin

Friis formula multi-stage noise figure cascade

Receiver sensitivity & noise floor: kTB + NF + SNR_min

VSWR ↔ return loss ↔ reflection coefficient ↔ mismatch loss

dBm/dBW/mW/W/dBµV/Vrms power level conversion

FSPL calculation with multi-unit distance/frequency input

EIRP / ERP equivalent radiated power: TX power + antenna gain − feed line loss

Multi-signal power summation (combining) calculation

Third-order intermodulation IM3 and TOI/OIP3 estimation with cascade

Multi-source phase noise total calculation

ADC ideal SNR, ENOB and oversampling gain calculation

Shannon channel capacity and spectral efficiency with SNR dB↔linear conversion

T/π attenuator: attenuation dB + impedance → R1/R2/R3

L-match network: source/load impedance + frequency → L/C values