TYPICAL CONVERSION FORMULAS

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TYPICAL CONVERSION FORMULAS

Collection of frequently used formulas for RF, Microwaves, Power, Voltage, Current and more

FIELD STRENGTH & POWER DENSITY

dB?V/m to V/m

V/m = 10 (((dB?V/m) -120) / 20)

V/m to dB?V/m

dB?V/m = 20 log(V/m) + 120

dB?V/m to dBmW/m?

dBmW/m? = dB?V/m ? 115.8

dBmW/m? to dB?V/m

dB?V/m = dBmW/m? + 115.8

dB?V/m to dB?A/m

dB?A/m = dB?V/m ? 51.5

dB?A/m to dB?V/m

dB?V/m = dB?A + 51.5

dB?A/m to dBpT

DBpT = dB?A/m + 2

dBpT to dB?A/m

dB?A/m = dBpT ? 2

W/m? to V/m

V/m = SQRT(W/m? * 377)

V/m to W/m?

W/m? = (V/m)? / 377

?T to A/m

A/m = ?T / 1.25

A/m to ?T

?T = 1.25 * A/m

LOOP ANTENNAS (AARONIA MDF ANTENNAS)

Correction Factors

dB?A/m = dB?V + AF

E-field (take care about dB?V/m = dB?A/m + 51.5

E-field suppression!)

FREQUENCY / BANDS 3Hz - 30Hz (ELF) 30Hz - 300Hz (SLF) 300Hz - 3kHz (ULF) 3kHz - 30kHz (VLF) 30kHz - 300kHz (LF) 300kHz - 3MHz (MF) 3MHz - 30MHz (HF) 30MHz - 300MHZ (VHF) 300MHz - 3GHz (UHF) 3GHz - 30GHz (SHF) 30GHz - 300GHz (EHF)

WAVELENGTH 100000km - 10000km 10000km - 1000km 1000km - 100km 100km - 10km 10km - 1km 1km - 100m 100m - 10m 10m - 1m 1m - 10cm 10cm - 1cm 1cm - 1mm

POWER dBm to Watts Watts to dBm dBW to Watts Watts to dBW dBW to dBm dBm to dBW

W = 10 ((dBm ? 30)/10) dBm = 10log(W) + 30 W = 10 (dBW / 10) dBW = 10log(W) dBm = dBW + 30 dBW = dBm - 30

CURRENT dB?A to ?A ?A to dB?A dBA to A A to dBA dBA to dB?A dB?A to dBA

?A = 10 (dB?A / 20) dB?A = 20 log(?A) A = 10 (dBA / 20) dBA = 20log(A) dB?A = dBA + 120 dBA = dB?A -120

VOLTAGE dB?V to Volts Volts to dB?V dBV to Volts Volts to dBV dBV to dB?V dB?V to dBV

V = 10 ((dB?V ? 120) / 20) dB?V = 20 log(V) + 120 V = 10 (dBV / 20) dBV = 20log(V) dB?V = dBV +120 dBV = dB?V - 120

UNIT CONVERSIONS dBm to dB?V dB?V to dBm dBm to dB?A dB?A to dBm dB?A to dB?V dB?V to dB?A

dB?V = dBm + 107 dBm = dB?V ? 107 dB?A = dBm + 73 dBm = dB?A ? 73 dB?V = dB?A + 34 dB?A = dB?V ? 34

(50) (50) (50) (50) (50) (50)

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