Half-Power Beamwidth of Helical Antenna Calculator

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Special Antennas

Antenna Theory Parameters

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✖Helix circumference of an imaginary cylinder that the helix conductor is wound around expressed in wavelengths. The ideal value for a helical antenna is 1.0.ⓘ Helix Circumference [C_λ]			+10% -10%
✖Number Of Turns Of Helical Antenna is the number of identical parallel antennas are arranged along a line.ⓘ Number of Turns of Helical Antenna [n]			+10% -10%
✖Turn Spacing in the antenna is the spacing between each turn of the antenna.ⓘ Turn Spacing [S]			+10% -10%

✖Half Power Beam Width is the area where most of the power is radiated.ⓘ Half-Power Beamwidth of Helical Antenna [B_hp]

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Formula

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Half-Power Beamwidth of Helical Antenna

Formula

`"B"_{"hp"} = 52/("C"_{"λ"}*sqrt("n"*"S"))`

Example

`"255.6886°"=52/("0.8m"*sqrt("6.01"*"35.3m"))`

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Half-Power Beamwidth of Helical Antenna Solution

STEP 0: Pre-Calculation Summary

Formula Used

Half Power Beam Width = 52/(Helix Circumference*sqrt(Number of Turns of Helical Antenna*Turn Spacing))
B_hp = 52/(C_λ*sqrt(n*S))
This formula uses 1 Functions, 4 Variables

Functions Used

sqrt - A square root function is a function that takes a non-negative number as an input and returns the square root of the given input number., sqrt(Number)

Variables Used

Half Power Beam Width - (Measured in Radian) - Half Power Beam Width is the area where most of the power is radiated.
Helix Circumference - (Measured in Meter) - Helix circumference of an imaginary cylinder that the helix conductor is wound around expressed in wavelengths. The ideal value for a helical antenna is 1.0.
Number of Turns of Helical Antenna - Number Of Turns Of Helical Antenna is the number of identical parallel antennas are arranged along a line.
Turn Spacing - (Measured in Meter) - Turn Spacing in the antenna is the spacing between each turn of the antenna.

STEP 1: Convert Input(s) to Base Unit

Helix Circumference: 0.8 Meter --> 0.8 Meter No Conversion Required
Number of Turns of Helical Antenna: 6.01 --> No Conversion Required
Turn Spacing: 35.3 Meter --> 35.3 Meter No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

B_hp = 52/(C_λ*sqrt(n*S)) --> 52/(0.8*sqrt(6.01*35.3))

Evaluating ... ...

B_hp = 4.46260829077855

STEP 3: Convert Result to Output's Unit

4.46260829077855 Radian -->255.688620681749 Degree (Check conversion here)

FINAL ANSWER

255.688620681749 ≈ 255.6886 Degree <-- Half Power Beam Width

(Calculation completed in 00.004 seconds)

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< 7 Helical Antennas Calculators

Beam Width between First Null (BWFN) of Helical Antenna

Go Helical Beam Width of First Null Broadside Array = 115*Helix Circumference^(3/2)/(Operational Circumference*sqrt(Turn Spacing*Number of Turns of Helical Antenna))

Gain of Helical Antenna

Go Helical Antenna Gain = 11.8+10*log10(Helix Circumference^2*Number of Turns of Helical Antenna*Turn Spacing)

Half-Power Beamwidth of Helical Antenna

Go Half Power Beam Width = 52/(Helix Circumference*sqrt(Number of Turns of Helical Antenna*Turn Spacing))

Pitch Angle of Helical Antenna

Go Pitch Angle = arctan(Turn Spacing/(pi*Helix Diameter))

Axial Ratio of Helical Antenna

Go Axial Ratio = ((2*Number of Turns of Helical Antenna)+1)/(2*Number of Turns of Helical Antenna)

Helix Circumference of Helical Antenna

Go Helix Circumference = Input Impedance/140

Input Impedance of Helical Antenna

Go Input Impedance = 140*Helix Circumference

Half-Power Beamwidth of Helical Antenna Formula

Half Power Beam Width = 52/(Helix Circumference*sqrt(Number of Turns of Helical Antenna*Turn Spacing))
B_hp = 52/(C_λ*sqrt(n*S))

How to indicate half power beam width?

When a line is drawn between radiation pattern’s origin and the half power points on the major lobe, on both the sides, the angle between those two vectors is termed as HPBW, half power beam width. The unit of HPBW is radians or degrees.

How to Calculate Half-Power Beamwidth of Helical Antenna?

Half-Power Beamwidth of Helical Antenna calculator uses Half Power Beam Width = 52/(Helix Circumference*sqrt(Number of Turns of Helical Antenna*Turn Spacing)) to calculate the Half Power Beam Width, The Half-Power Beamwidth of Helical Antenna formula represents the angle within the main lobe of the antenna where its gain is above 50% of the peak gain (angle between -3dB points of the main lobe). Half Power Beam Width is denoted by B_hp symbol.

How to calculate Half-Power Beamwidth of Helical Antenna using this online calculator? To use this online calculator for Half-Power Beamwidth of Helical Antenna, enter Helix Circumference (C_λ), Number of Turns of Helical Antenna (n) & Turn Spacing (S) and hit the calculate button. Here is how the Half-Power Beamwidth of Helical Antenna calculation can be explained with given input values -> 14662.08 = 52/(0.8*sqrt(number_of_turns_awp*35.3)).

FAQ

What is Half-Power Beamwidth of Helical Antenna?

The Half-Power Beamwidth of Helical Antenna formula represents the angle within the main lobe of the antenna where its gain is above 50% of the peak gain (angle between -3dB points of the main lobe) and is represented as B_hp = 52/(C_λ*sqrt(n*S)) or Half Power Beam Width = 52/(Helix Circumference*sqrt(Number of Turns of Helical Antenna*Turn Spacing)). Helix circumference of an imaginary cylinder that the helix conductor is wound around expressed in wavelengths. The ideal value for a helical antenna is 1.0, Number Of Turns Of Helical Antenna is the number of identical parallel antennas are arranged along a line & Turn Spacing in the antenna is the spacing between each turn of the antenna.

How to calculate Half-Power Beamwidth of Helical Antenna?

The Half-Power Beamwidth of Helical Antenna formula represents the angle within the main lobe of the antenna where its gain is above 50% of the peak gain (angle between -3dB points of the main lobe) is calculated using Half Power Beam Width = 52/(Helix Circumference*sqrt(Number of Turns of Helical Antenna*Turn Spacing)). To calculate Half-Power Beamwidth of Helical Antenna, you need Helix Circumference (C_λ), Number of Turns of Helical Antenna (n) & Turn Spacing (S). With our tool, you need to enter the respective value for Helix Circumference, Number of Turns of Helical Antenna & Turn Spacing 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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