RF Calculators

For full format paper (including table, picture, graphic etc) Please open at  RF Calculators

Untuk tulisan lebih lengkap (dengan gambar, tabel, grafik dll) silahkan buka pada link berikut RF Calculators

 Select a calculator tab at the bottom of this page for assistance with your radio frequency (RF) needs.

 Calculators available include Power, VSWR & Return Loss, Frequency & Wavelength,

 Attenuation, Directivity, Cable Loss, Masking Effect,

 Field Strength, Free Space Loss and Metric Conversions.

Frequency & Wavelength Calculator
Enter frequency or wavelength and select units to determine equivalent values.
		Enter	150,000	2
		Frequency =	150.000,000	Kilohertz (kHz)
		Frequency =	150,000	Megahertz (MHz)
		Frequency =	0,150	Gigahertz (GHz)
		Wavelength =	2,000	Meters (m)
		Wavelength =	200,000	Centimeters (cm)
		Wavelength =	6,562	Feet (ft)
		Wavelength =	78,740	Inches (in)
	1 MHz = 1,000 kHz     1 GHz = 1,000 MHz
	Wavelength (Meters) = 300 / Frequency (MHz)

Power Calculator
Enter power and select units to determine equivalent values.
	Enter	100,000	6
	Power =	50,000	dBm
	Power =	100.000.000.000.000,000	Picowatts (pW)
	Power =	100.000.000.000,000	Nanowatts (nW)
	Power =	100.000.000,000	Microwatts (uW)
	Power =	100.000,000	Milliwatts (mW)
	Power =	100,000	Watts (W)
	Power =	0,100	Kilowatts (kW)
1 kW = 1,000 W     1 W = 1,000 mW = 1,000,000 uW
1 W = 1,000,000,000 nW = 1,000,000,000,000 pW
Power (dBm) = 10 x Log [ Power (Watts) ] + 30 dB

VSWR & Return Loss Calculator
Enter forward and reflected power or match to determine equivalent values.
Enter	Forward Power	2000,00	Watts		Enter	1,500	1
Enter	Reflected Power	4,00	Watts		=	1,500	VSWR
Calculates	VSWR	1,09			=	-13,979	Return Loss (dB)
Calculates	Return Loss	-26,99	dB		=	96,000	Match Efficiency (%)
Calculates	Match Efficiency	99,80	%		=	0,200	Rho
Calculates	Rho	0,04
Enter	Power	50,00	Watts		VSWR = Voltage Standing Wave Ratio
Calculates	Power	46,99	dBm		Pf = Forward Power (Watts)
					Pr = Reflected Power (Watts)
Enter	Power	47,00	dBm		VSWR = [1+Sqrt(Pr / Pf)] / [1-Sqrt(Pr / Pf)]
Calculates	Power	50,12	Watts		Return Loss (dB) = 10 x Log ( Pr / Pf )
					Match Efficiency (%) = 100% x (1 - Pr / Pf)
Power (dBm) = 10 x Log [ Power (Watts) ] + 30 dB					Rho = Sqrt ( Pr / Pf )

Attenuation Calculator
Enter power or attenuation to determine values.
Enter	Input Power	50,00	Watts		Enter	Input Power	50,00	Watts
Enter	Output Power	25,00	Watts		Enter	Attenuation	3,00	dB
Calculates	Input Power	46,99	dBm		Calculates	Input Power	46,99	dBm
Calculates	Output Power	43,98	dBm		Calculates	Output Power	43,99	dBm
Calculates	Attenuation	3,01	dB		Calculates	Output Power	25,06	Watts
Enter	Power	50,00	Watts		Enter	Output Power	25,00	Watts
Calculates	Power	46,99	dBm		Enter	Attenuation	3,00	dB
					Calculates	Output Power	43,98	dBm
Enter	Power	47,00	dBm		Calculates	Input Power	46,98	dBm
Calculates	Power	50,12	Watts		Calculates	Input Power	49,88	Watts
Output Power (dBm) = Input Power (dBm) - Attenuation (dB)
Power (dBm) = 10 x Log [ Power (Watts) ] + 30 dB

Directivity Error Calculator
Enter directivity, forward power and reflected power to determine directivity errors.
Enter	Directivity of Coupler	0,050	dB		Directivity is a measure of the ability of a
Enter	Forward Power	100,000	Watts		directional coupler to discern between the
Enter	Reflected Power	4,000	Watts		forward and reflected traveling wave in a
Calculates	Forward Power Minimum	64,184	Watts		transmission system.
Calculates	Forward Power Maximum	143,725	Watts
Calculates	Forward Power Min Error	-35,816	%		Power meters, antenna monitors and
Calculates	Forward Power Max Error	43,725	%		analyzers are coupler based test
Calculates	Reflected Power Minimum	0,000	Watts		equipment which are used to measure
Calculates	Reflected Power Maximum	142,626	Watts		forward and reflected power as well as
Calculates	Reflected Power Min Error	-100,000	%		VSWR and return loss.
Calculates	Reflected Power Max Error	3465,643	%
Calculates	VSWR Minimum	1,000			Directivity errors result in measurements
Calculates	VSWR	1,500			which may vary between maximum and
Calculates	VSWR Maximum	-5,076			minimum values.
Calculates	Return Loss Minimum	-Infinity	dB
Calculates	Return Loss	-13,979	dB
Calculates	Return Loss Maximum	3,468	dB
The following is a step-by-step procedure to calculate the results which are displayed above:
Given	Directivity of Coupler	0,050	dB		Dir = Directivity of Coupler
Given	Forward Power	100,000	Watts		Pf = Forward Power
Given	Reflected Power	4,000	Watts		Pr = Reflected Power
Calculates	Directivity Power Ratio	1			Directivity Power Ratio = 10 ^ (Dir / 10)
Calculates	Directivity Forward Power	3,954	Watts		Pfd = Pr / Directivity Power Ratio
Calculates	Directivity Reflected Power	98,855	Watts		Prd = Pf / Directivity Power Ratio
Calculates	Forward Voltage	70,711	Volts		Vf = Sqrt (Pf x 50 Ohms)
Calculates	Reflected Voltage	14,142	Volts		Vr = Sqrt (Pr x 50 Ohms)
Calculates	Directivity Forward Voltage	14,061	Volts		Vfd = Sqrt (Pfd x 50 Ohms)
Calculates	Directivity Reflected Voltage	70,305	Volts		Vrd = Sqrt (Prd x 50 Ohms)
Note, voltage vectors add when in phase or subtract when 180 degrees out of phase with each other
Calculates	Forward Voltage Minimum	56,650	Volts		Vf (Min) = Vf - Vfd
Calculates	Forward Voltage Maximum	84,772	Volts		Vf (Max) = Vf + Vfd
Calculates	Reflected Voltage Minimum	0,000	Volts		Vr (Min) = Vr - Vrd (or 0 if Vrd > Vr)
Calculates	Reflected Voltage Maximum	84,447	Volts		Vr (Max) = Vr + Vrd
Calculates	Forward Power Minimum	64,184	Watts		Pf (Min) = (Vf (Min) ^ 2) / 50 Ohms
Calculates	Forward Power Min Error	-35,816	%		Error = 100% x (Pf (Min) - Pf) / Pf
Calculates	Forward Power Maximum	143,725	Watts		Pf (Max) = (Vf (Max) ^ 2) / 50 Ohms
Calculates	Forward Power Max Error	43,725	%		Error = 100% x (Pf (Max) - Pf) / Pf
Calculates	Reflected Power Minimum	0,000	Watts		Pr (Min) = (Vr (Min) ^ 2) / 50 Ohms
Calculates	Reflected Power Min Error	-100,000	%		Error = 100% x (Pr (Min) - Pr) / Pr
Calculates	Reflected Power Maximum	142,626	Watts		Pr (Max) = (Vr (Max) ^ 2) / 50 Ohms
Calculates	Reflected Power Max Error	3465,643	%		Error = 100% x (Pr (Max) - Pr) / Pr
Calculates	Rho Minimum	0,000			Rho (Min) = Sqrt (Pr (Min) / Pf (Max))
Calculates	Rho	0,200			Rho = Sqrt (Pr / Pf)
Calculates	Rho Maximum	1,491			Rho (Max) = Sqrt (Pr (Max) / Pf (Min))
Calculates	VSWR Minimum	1,000			VSWR (Min) = (1 + Rho (Min)) / (1 - Rho (Min))
Calculates	VSWR	1,500			VSWR = (1 + Rho) / (1 - Rho)
Calculates	VSWR Maximum	-5,076			VSWR (Max) = (1 + Rho (Max)) / (1 - Rho (Max))
Calculates	Return Loss Minimum	-Infinity	dB		Return Loss (Min) = 10 x Log (Pr (Min) / Pf (Max))
Calculates	Return Loss	-13,979	dB		Return Loss = 10 x Log ( Pr / Pf )
Calculates	Return Loss Maximum	3,468	dB		Return Loss (Max) = 10 x Log (Pr (Max) / Pf (Min))

Cable Loss Calculator
Enter cable, jumper, connector and other loss parameters to determine transmission cable system insertion loss.
Cable loss is the total insertion loss of your transmission cable system.
This typically includes insertion loss of the transmission cable, jumper cables, connectors and lightning protection.
Loss of other components (e.g. VSWR/power monitor, duplexer, combiner or filter) may also come into play.
Enter	Cable Loss/100 m or ft	1,13	dB		Loss per 100 Meters or Feet at Frequency
Enter	Cable Length (m or ft)	230,00	m or ft		Length in Meters or Feet
Calculates	Cable Loss	2,60	dB		Transmission Cable Insertion Loss
Enter	Top Jumper Loss/100 m or ft	3,23	dB		Loss per 100 Meters or Feet at Frequency
Enter	Top Jumper Length (m or ft)	10,00	m or ft		Length in Meters or Feet
Calculates	Top Jumper Loss	0,32	dB		Top/Antenna Jumper Cable Insertion Loss
Enter	Bottom Jumper Loss/100 m or ft	3,23	dB		Loss per 100 Meters or Feet at Frequency
Enter	Bottom Jumper Length (m or ft)	20,00	m or ft		Length in Meters or Feet
Calculates	Bottom Jumper Loss	0,65	dB		Bottom/Tx Jumper Cable Insertion Loss
Enter	Loss per Connector	0,05	dB		Connector Insertion Loss
Enter	Number of Connectors	8			Two Connectors per Pair
Calculates	Connector Loss	0,40	dB		Connector Insertion Loss
Enter	Lightning Protection Loss	0,10	dB		Lightning Protection Insertion Loss
Enter	VSWR/Power Monitor Loss	0,00	dB		VSWR/Power Monitor Insertion Loss
Enter	Other Component Loss	0,00	dB		Loss of Combiner, Duplexer, Filter, etc.
Calculates	Total Cable System Loss	4,07	dB		Transmission Cable System Insertion Loss

Masking Effect Calculator
Enter cable loss and match or forward and reflected power to determine the masking effect.
Enter	Cable Insertion Loss	0,30	dB		Antenna measurements taken
Enter	VSWR at Transmitter	1,50			at the transmitter end of the cable
Calculates	VSWR of Antenna	1,55			will be masked by the cable loss.
Enter	Cable Insertion Loss	0,10	dB		CL = Cable Insertion Loss
Enter	Return Loss at Transmitter	-14,00	dB		RLt = Return Loss at Transmitter
Calculates	Return Loss of Antenna	-13,80	dB		RLa = Return Loss of Antenna = RLt - (2 x CL)
Enter	Cable Insertion Loss	3,00	dB		CL = Cable Insertion Loss
Enter	Forward Power at Transmitter	100,00	Watts		Pft = Forward Power at Transmitter
Enter	Reflected Power at Transmitter	4,00	Watts		Prt = Reflected Power at Transmitter
Calculates	Rho at Transmitter	0,20			Rhot = Sqrt (Prt / Pft)
Calculates	VSWR at Transmitter	1,50			VSWRt = (1 + Rhot) / (1 - Rhot)
Calculates	Return Loss at Transmitter	-13,98	dB		RLt = 10 x Log (Prt / Pft)
Calculates	Forward Power at Transmitter	50,00	dBm		Pft (dBm) = 10 x Log (Pft (Watts)) + 30 Db
Calculates	Forward Power at Antenna	47,00	dBm		Pfa (dBm) = Pft (dBm) + CL
Calculates	Reflected Power at Transmitter	36,02	dBm		Prt (dBm) = 10 x Log (Prt (Watts)) + 30 dB
Calculates	Reflected Power at Antenna	39,02	dBm		Pra (dBm) = Prt (dBm) – CL
Calculates	Forward Power at Antenna	50,12	Watts		Pfa (Watts) = 10 ^ ((Pfa (dBm) - 30) / 10)
Calculates	Reflected Power at Antenna	7,98	Watts		Pra (Watts) = 10 ^ ((Pra (dBm) - 30) / 10)
Calculates	Rho of Antenna	0,40			Rhoa = Rho of Antenna = Sqrt (Pra / Pfa)
Calculates	VSWR of Antenna	2,33			VSWRa = (1 + Rhoa) / (1 - Rhoa)
Calculates	Return Loss of Antenna	-7,98	dB		RLa = 10 x Log (Pra / Pfa)

Field Strength Calculator
Enter signal power level, frequency and antenna gain to determine field strength.
Enter	Signal Power Level	-30,000	dBm		The field strength of the signal emitted
Enter	Frequency	155,000	MHz		by a radio antenna is usually expressed
Enter	Receive Antenna Gain	3,000	dB		in units of microvolts per meter (uV/m).
Calculates	Antenna Factor	11,007	dB
Calculates	Signal Level	77,000	dBuV		This may be calculated if the signal power
Calculates	Signal Level	88,007	dBuV/m		level (dBm), frequency and the gain of the
Calculates	Field Strength	0,025	V/m		receive antenna are known.
Calculates	Field Strength	25,138	mV/m
Calculates	Field Strength	25.138,057	uV/m
Antenna Factor (dB) = 20 Log (Frequency (MHz)) - Antenna Gain (dB) -29.8
Signal Level (dBuV) = Signal Level (dBm) + 107 dB
Signal Level (dBuV/m) = Signal Level (dBuV) + Antenna Factor (dB)
Field Strength (uV/m) = 10 ^ (Signal Level (dBuV/m) / 20)
1 V/m = 1,000 mV/m = 1,000,000 uVm

Free Space Loss Calculator
Enter frequency and distance to determine free space loss.
Enter	Frequency	800,000	MHz		Free Space Loss is the power loss of a
Enter	Distance	1,000	Miles		radio signal as it travels through free space.
Calculates	Free Space Loss	94,662	dB
					Losses due to sources such as earth, trees,
					buildings, cables and connectors as well as
Enter	Frequency	800,000	MHz		antenna gains are not considered.
Enter	Distance	1,000	Kilometers
Calculates	Free Space Loss	90,529	dB
Free Space Loss (dB) = 36.6 + 20 x Log (Frequency (MHz) x Distance (Miles))
1 Mile = 1.6093 Kilometers

	Metric Conversions
	Enter quantity and select units to determine equivalent values.
	Length					Weight
	Enter	1,000	7			Enter	1,000	4
	=	160.934,400	Centimeters (cm)			=	1.000,000	Grams (g)
	=	63.360,034	Inches (in)			=	35,274	Ounces (oz)
	=	5.279,936	Feet (ft)			=	2,205	Pounds (lb)
	=	1.759,979	Yards (yd)			=	1,000	Kilograms (kg)
	=	1.609,344	Meters (m)			=	0,022	Hundredwt (cwt)
	=	1,609	Kilometers (km)			=	0,001	Tons (ton)
	=	1,000	Miles (mi)			=	0,001	Tonnes (t)
1 in = 2.54 cm     1 m = 3.28 ft     1 mi = 1.6 km						1 oz = 28.35 g     1 kg = 2.2 lb     1 t = 1.1 ton
	Area					Temperature
	Enter	1,000	4			Enter	0,000	2
	=	10.000,000	Square cm			=	32,000	Fahrenheit (F)
	=	1.550,005	Square in			=	0,000	Celsius (C)
	=	10,764	Square ft			=	491,690	Rankine (R)
	=	1,000	Square m			=	273,150	Kelvin (K)
	=	0,000	Acres
	=	0,000	Square km			C = 5/9 (F - 32)
	=	0,000	Square mi			R = F + 459.69     K = C + 273.15
1 sq in = 6.45 sq cm     1 sq m = 10.76 sq ft
1 sq mi = 2.6 sq km
	Volume
	Enter	2,000	4
	=	2.000,000	Milliliters (ml)
	=	67,628	Fluid Oz (fl oz)
	=	2,113	Quarts (qt)
	=	2,000	Liters (l)
	=	0,528	Gallons (gal)
	=	0,071	Cubic Ft (cu ft)
	=	0,002	Cubic M (cu m)
	1 fl oz = 29.6 ml     1 liter = 1.06 qt
	1 gal = 3.8 liters     1 cu m = 35.3 cu ft