Minimum Distance from Antenna Calculator

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Transmission Line & Antenna Theory

Transmission Line Characteristics

✖Parabolic Reflector Diameter refers to the width of the reflector from one edge to the opposite edge, passing through the center.ⓘ Parabolic Reflector Diameter [D]			+10% -10%
✖The wavelength of an electromagnetic wave is an important parameter in the design and operation of transmission lines and antennas.ⓘ Wavelength [λ]			+10% -10%

✖The minimum distance from antenna is crucial because it helps maintain the integrity of the signal being transmitted. It is the minimum distance required for far field measurement.ⓘ Minimum Distance from Antenna [r_min]

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Formula

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Minimum Distance from Antenna

Formula

`"r"_{"min"} = (2*"D"^2)/"λ"`

Example

`"2.307692m"=(2*("3m")^2)/"7.8m"`

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Minimum Distance from Antenna Solution

STEP 0: Pre-Calculation Summary

Formula Used

Minimum Distance from Antenna = (2*Parabolic Reflector Diameter^2)/Wavelength
r_min = (2*D^2)/λ
This formula uses 3 Variables

Variables Used

Minimum Distance from Antenna - (Measured in Meter) - The minimum distance from antenna is crucial because it helps maintain the integrity of the signal being transmitted. It is the minimum distance required for far field measurement.
Parabolic Reflector Diameter - (Measured in Meter) - Parabolic Reflector Diameter refers to the width of the reflector from one edge to the opposite edge, passing through the center.
Wavelength - (Measured in Meter) - The wavelength of an electromagnetic wave is an important parameter in the design and operation of transmission lines and antennas.

STEP 1: Convert Input(s) to Base Unit

Parabolic Reflector Diameter: 3 Meter --> 3 Meter No Conversion Required
Wavelength: 7.8 Meter --> 7.8 Meter No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

r_min = (2*D^2)/λ --> (2*3^2)/7.8

Evaluating ... ...

r_min = 2.30769230769231

STEP 3: Convert Result to Output's Unit

2.30769230769231 Meter --> No Conversion Required

FINAL ANSWER

2.30769230769231 ≈ 2.307692 Meter <-- Minimum Distance from Antenna

(Calculation completed in 00.013 seconds)

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Created by Vidyashree V

BMS College of Engineering (BMSCE), Bangalore

Vidyashree V has created this Calculator and 25+ more calculators!

Verified by Saiju Shah

Jayawantrao Sawant College of Engineering (JSCOE), Pune

Saiju Shah has verified this Calculator and 25+ more calculators!

< 15 Transmission Line & Antenna Theory Calculators

Gain of Parabolic Reflector Antenna

Go Gain of Parabolic Reflector Antenna = 10*log10(Efficiency Factor of Parabolic Reflector*(pi*Parabolic Reflector Diameter/Wavelength)^2)

Velocity of Propagation in Telephonic Cable

Go Velocity of Propagation in Telephonic Cable = sqrt((2*Angular Velocity)/(Resistance*Capacitance))

Phase Constant in Telephone Cable

Go Phase Constant = sqrt((Angular Velocity*Resistance*Capacitance)/2)

Return Loss(dB)

Go Return Loss = 20*log10(Incident Power Fed into Antenna/Reflected Power by Antenna)

Parallel Waveguide Distance from Cutoff Wavenumber

Go Parallel Waveguide Distance = (Mode Index*pi)/Cutoff Wavenumber

Cutoff Wavenumber in TM and TE Mode

Go Cutoff Wavenumber = (Mode Index*pi)/Parallel Waveguide Distance

Focal Length of Reflector

Go Focal Length of Reflector = ((Parabolic Reflector Diameter^2)/(16*Depth of Parabola))

Polarization Mismatch Loss

Go Polarization Mismatch Loss = -20*log10(cos(Theta))

Minimum Distance from Antenna

Go Minimum Distance from Antenna = (2*Parabolic Reflector Diameter^2)/Wavelength

Beamwidth of Reflector

Go Beamwidth = (70*Wavelength)/Parabolic Reflector Diameter

Voltage Maxima

Go Voltage Maxima = Incident Voltage+Reflected Voltage

Voltage Minima

Go Voltage Minima = Incident Voltage-Reflected Voltage

Current Maxima

Go Current Maxima = Incident Current+Reflected Current

Current Minima

Go Current Minima = Incident Current-Reflected Current

Velocity Factor

Go Velocity Factor = 1/(sqrt(Dielectric Constant))

Minimum Distance from Antenna Formula

Minimum Distance from Antenna = (2*Parabolic Reflector Diameter^2)/Wavelength
r_min = (2*D^2)/λ

What is the significance of distance from the antenna?

The field pattern that exists close to the antenna is different from the one at a distance,which is the one of interest. The far field is also called the radiation field. For radiation pattern measurement it is important to choose a distance sufficiently large.

How to Calculate Minimum Distance from Antenna?

Minimum Distance from Antenna calculator uses Minimum Distance from Antenna = (2*Parabolic Reflector Diameter^2)/Wavelength to calculate the Minimum Distance from Antenna, The Minimum Distance from Antenna formula is defined as the minimum permissible distance from the antenna, which depends on the dimension of the antenna in relation to the wavelength. The minimum distance from antenna is crucial because it helps maintain the integrity of the signal being transmitted. Minimum Distance from Antenna is denoted by r_min symbol.

How to calculate Minimum Distance from Antenna using this online calculator? To use this online calculator for Minimum Distance from Antenna, enter Parabolic Reflector Diameter (D) & Wavelength (λ) and hit the calculate button. Here is how the Minimum Distance from Antenna calculation can be explained with given input values -> 2.307692 = (2*3^2)/7.8.

FAQ

What is Minimum Distance from Antenna?

The Minimum Distance from Antenna formula is defined as the minimum permissible distance from the antenna, which depends on the dimension of the antenna in relation to the wavelength. The minimum distance from antenna is crucial because it helps maintain the integrity of the signal being transmitted and is represented as r_min = (2*D^2)/λ or Minimum Distance from Antenna = (2*Parabolic Reflector Diameter^2)/Wavelength. Parabolic Reflector Diameter refers to the width of the reflector from one edge to the opposite edge, passing through the center & The wavelength of an electromagnetic wave is an important parameter in the design and operation of transmission lines and antennas.

How to calculate Minimum Distance from Antenna?

The Minimum Distance from Antenna formula is defined as the minimum permissible distance from the antenna, which depends on the dimension of the antenna in relation to the wavelength. The minimum distance from antenna is crucial because it helps maintain the integrity of the signal being transmitted is calculated using Minimum Distance from Antenna = (2*Parabolic Reflector Diameter^2)/Wavelength. To calculate Minimum Distance from Antenna, you need Parabolic Reflector Diameter (D) & Wavelength (λ). With our tool, you need to enter the respective value for Parabolic Reflector Diameter & Wavelength 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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