RF Calculators

Source: PA2OHH

LCR calculations:

Resonance frequency of an L/C circuit, calculate F, C, L

Impedance of a capacitor or inductor

Two resistors or inductors in parrallel or two capacitors in series

Electric and magnetic fields:

Path loss in free space for space communications

Gain of a parabolic antenna

K-factor of an antenna (for conversion from dBuV to fieldstrength)

Conversion of dBm from a reception antenna to power density / fieldstrength

Field strength of a transmitter in free space

Magnetic field strength close to a loop antenna

Conversions between dB's volts, ampere, watts etc.:

volts, ampere, watts to dB values and vv

dBuV, dBuA to dBm and vv

Noise:

Galactic noise

Various:

Windings on a toroide

Thevenin, voltage divider

Body Mass Index calculator

Specific:

Limits lin and log with frequency

Limits per oct

EMC test setup with long wire