CFA RF Drive Power Calculator

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Special Purpose Radars

Radar & Antenna Specifications

Radar Antennas Reception

✖CFA RF Power Output which is also known as transmitter power output (TPO) is the actual amount of power of radio frequency (RF) energy that a transmitter produces at its output.ⓘ CFA RF Power Output [P_out]			+10% -10%
✖Efficiency of Cross Field Amplifier refers to the ratio of output power to input power in the device. CFAs are vacuum tube devices used to amplify high-frequency radio-frequency (RF) signals.ⓘ Efficiency of Cross Field Amplifier [η_cfa]			+10% -10%
✖DC Power Input is the power input through direct current supply.ⓘ DC Power Input [P_dc]			+10% -10%

✖CFA RF Drive Power refers to the radio frequency (RF) power that is applied to the input of the CFA which is usually a weak signal that needs amplification to reach a higher power.ⓘ CFA RF Drive Power [P_drive]

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Formula

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CFA RF Drive Power

Formula

`"P"_{"drive"} = "P"_{"out"}-"η"_{"cfa"}*"P"_{"dc"} `

Example

`"70W"="96.46W"-"0.98"*"27W" `

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Download Special Purpose Radars Formulas PDF

CFA RF Drive Power Solution

STEP 0: Pre-Calculation Summary

Formula Used

CFA RF Drive Power = CFA RF Power Output-Efficiency of Cross Field Amplifier*DC Power Input
P_drive = P_out-η_cfa*P_dc
This formula uses 4 Variables

Variables Used

CFA RF Drive Power - (Measured in Watt) - CFA RF Drive Power refers to the radio frequency (RF) power that is applied to the input of the CFA which is usually a weak signal that needs amplification to reach a higher power.
CFA RF Power Output - (Measured in Watt) - CFA RF Power Output which is also known as transmitter power output (TPO) is the actual amount of power of radio frequency (RF) energy that a transmitter produces at its output.
Efficiency of Cross Field Amplifier - Efficiency of Cross Field Amplifier refers to the ratio of output power to input power in the device. CFAs are vacuum tube devices used to amplify high-frequency radio-frequency (RF) signals.
DC Power Input - (Measured in Watt) - DC Power Input is the power input through direct current supply.

STEP 1: Convert Input(s) to Base Unit

CFA RF Power Output: 96.46 Watt --> 96.46 Watt No Conversion Required
Efficiency of Cross Field Amplifier: 0.98 --> No Conversion Required
DC Power Input: 27 Watt --> 27 Watt No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

P_drive = P_out-η_cfa*P_dc --> 96.46-0.98*27

Evaluating ... ...

P_drive = 70

STEP 3: Convert Result to Output's Unit

70 Watt --> No Conversion Required

FINAL ANSWER

70 Watt <-- CFA RF Drive Power

(Calculation completed in 00.007 seconds)

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Created by Shobhit Dimri

Bipin Tripathi Kumaon Institute of Technology (BTKIT), Dwarahat

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< 21 Special Purpose Radars Calculators

Amplitude of Signal Received from Target at Range

Go Amplitude of Signal Received = Echo Signal Voltage/(sin((2*pi*(Carrier Frequency+Doppler Frequency Shift)*Time Period)-((4*pi*Carrier Frequency*Range)/[c])))

Echo Signal Voltage

Go Echo Signal Voltage = Amplitude of Signal Received*sin((2*pi*(Carrier Frequency+Doppler Frequency Shift)*Time Period)-((4*pi*Carrier Frequency*Range)/[c]))

Velocity Smoothing Parameter

Go Velocity Smoothing Parameter = ((Smoothed Velocity-(n-1)th Scan Smoothed Velocity)/(Measured Position at Nth Scan-Target Predicted Position))*Time between Observations

Time between Observations

Go Time between Observations = (Velocity Smoothing Parameter/(Smoothed Velocity-(n-1)th Scan Smoothed Velocity))*(Measured Position at Nth Scan-Target Predicted Position)

Smoothed Velocity

Go Smoothed Velocity = (n-1)th Scan Smoothed Velocity+Velocity Smoothing Parameter/Time between Observations*(Measured Position at Nth Scan-Target Predicted Position)

Phase Difference between Echo Signals in Monopulse Radar

Go Phase Difference between Echo Signals = 2*pi*Distance between Antennas in Monopulse Radar*sin(Angle in Monopulse Radar)/Wavelength

Predicted Position of Target

Go Target Predicted Position = (Smoothed Position-(Position Smoothing Parameter*Measured Position at Nth Scan))/(1-Position Smoothing Parameter)

Amplitude of Reference Signal

Go Amplitude of Reference Signal = CW Oscillator Reference Voltage/(sin(2*pi*Angular Frequency*Time Period))

Measured Position at Nth Scan

Go Measured Position at Nth Scan = ((Smoothed Position-Target Predicted Position)/Position Smoothing Parameter)+Target Predicted Position

Position Smoothing Parameter

Go Position Smoothing Parameter = (Smoothed Position-Target Predicted Position)/(Measured Position at Nth Scan-Target Predicted Position)

Reference Voltage of CW Oscillator

Go CW Oscillator Reference Voltage = Amplitude of Reference Signal*sin(2*pi*Angular Frequency*Time Period)

Smoothed Position

Go Smoothed Position = Target Predicted Position+Position Smoothing Parameter*(Measured Position at Nth Scan-Target Predicted Position)

Distance from Antenna 1 to Target in Monopulse Radar

Go Distance from Antenna 1 to Target = (Range+Distance between Antennas in Monopulse Radar)/2*sin(Angle in Monopulse Radar)

Distance from Antenna 2 to Target in Monopulse Radar

Go Distance from Antenna 2 to Target = (Range-Distance between Antennas in Monopulse Radar)/2*sin(Angle in Monopulse Radar)

CFA DC Power Input

Go DC Power Input = (CFA RF Power Output-CFA RF Drive Power)/Efficiency of Cross Field Amplifier

Efficiency of Cross Field Amplifier(CFA)

Go Efficiency of Cross Field Amplifier = (CFA RF Power Output-CFA RF Drive Power)/DC Power Input

CFA RF Power Output

Go CFA RF Power Output = Efficiency of Cross Field Amplifier*DC Power Input+CFA RF Drive Power

CFA RF Drive Power

Go CFA RF Drive Power = CFA RF Power Output-Efficiency of Cross Field Amplifier*DC Power Input

Range Resolution

Go Range Resolution = (2*Antenna Height*Target Height)/Range

Doppler Frequency Shift

Go Doppler Frequency Shift = (2*Target Velocity)/Wavelength

Peak Quantization Lobe

Go Peak Quantization Lobe = 1/2^(2*Mean Lobe)

CFA RF Drive Power Formula

CFA RF Drive Power = CFA RF Power Output-Efficiency of Cross Field Amplifier*DC Power Input
P_drive = P_out-η_cfa*P_dc

What are Cross-Field Amplifiers?

A crossed-field amplifier (CFA) is a specialized vacuum tube, first introduced in the mid-1950s and frequently used as a microwave amplifier in very-high-power transmitters.

How to Calculate CFA RF Drive Power?

CFA RF Drive Power calculator uses CFA RF Drive Power = CFA RF Power Output-Efficiency of Cross Field Amplifier*DC Power Input to calculate the CFA RF Drive Power, The CFA RF drive power formula refers to the radio frequency (RF) power that is applied to the input of the CFA which is usually a weak signal that needs amplification to reach a higher power level for further use in the radar system or other applications. CFA RF Drive Power is denoted by P_drive symbol.

How to calculate CFA RF Drive Power using this online calculator? To use this online calculator for CFA RF Drive Power, enter CFA RF Power Output (P_out), Efficiency of Cross Field Amplifier (η_cfa) & DC Power Input (P_dc) and hit the calculate button. Here is how the CFA RF Drive Power calculation can be explained with given input values -> 68.54 = 96.46-0.98*27 .

FAQ

What is CFA RF Drive Power?

The CFA RF drive power formula refers to the radio frequency (RF) power that is applied to the input of the CFA which is usually a weak signal that needs amplification to reach a higher power level for further use in the radar system or other applications and is represented as P_drive = P_out-η_cfa*P_dc or CFA RF Drive Power = CFA RF Power Output-Efficiency of Cross Field Amplifier*DC Power Input. CFA RF Power Output which is also known as transmitter power output (TPO) is the actual amount of power of radio frequency (RF) energy that a transmitter produces at its output, Efficiency of Cross Field Amplifier refers to the ratio of output power to input power in the device. CFAs are vacuum tube devices used to amplify high-frequency radio-frequency (RF) signals & DC Power Input is the power input through direct current supply.

How to calculate CFA RF Drive Power?

The CFA RF drive power formula refers to the radio frequency (RF) power that is applied to the input of the CFA which is usually a weak signal that needs amplification to reach a higher power level for further use in the radar system or other applications is calculated using CFA RF Drive Power = CFA RF Power Output-Efficiency of Cross Field Amplifier*DC Power Input. To calculate CFA RF Drive Power, you need CFA RF Power Output (P_out), Efficiency of Cross Field Amplifier (η_cfa) & DC Power Input (P_dc). With our tool, you need to enter the respective value for CFA RF Power Output, Efficiency of Cross Field Amplifier & DC Power Input and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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