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Input Impedance of Helical Antenna Formula

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The Input Impedance can be calculated as the current travels along the antenna and the phase varies continuously. Check FAQs

Z h = 140 \cdot C λ

Z_h - Input Impedance?C_λ - Helix Circumference?

Input Impedance of Helical Antenna Example

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Here is how the Input Impedance of Helical Antenna equation looks like with Values.

Here is how the Input Impedance of Helical Antenna equation looks like with Units.

Here is how the Input Impedance of Helical Antenna equation looks like.

112 = 140 \cdot 0.8

112Ω = 140 \cdot 0.8m

112 = 140 \cdot 0.8

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Input Impedance of Helical Antenna Solution

Follow our step by step solution on how to calculate Input Impedance of Helical Antenna?

FIRST Step Consider the formula

Z h = 140 \cdot C λ

Next Step Substitute values of Variables

∴

Z h = 140 \cdot 0.8m

Next Step Prepare to Evaluate

∴

Z h = 140 \cdot 0.8

LAST Step Evaluate

∴

Z h = 112Ω

Input Impedance of Helical Antenna Formula Elements

Variables

Input Impedance

The Input Impedance can be calculated as the current travels along the antenna and the phase varies continuously.

Symbol: Z_h

Measurement: Electric ResistanceUnit: Ω

Note: Value should be greater than 0.

Formulas to find Input Impedance

Helix Circumference

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.

Symbol: C_λ

Measurement: WavelengthUnit: m

Note: Value should be greater than 0.

Formulas to find Helix Circumference

Other formulas in Helical Antennas category

Go Gain of Helical Antenna

G a = 11.8 + 10 \cdot \log 10 ({C λ}^{2} \cdot n \cdot S)

Go Helix Circumference of Helical Antenna

C λ = \frac{Z h}{140}

Go Beam Width between First Null (BWFN) of Helical Antenna

BW fn = 115 \cdot \frac{{C λ}^{\frac{3}{2}}}{C \cdot \sqrt{S \cdot n}}

Go Half-Power Beamwidth of Helical Antenna

B hp = \frac{52}{C λ \cdot \sqrt{n \cdot S}}

How to Evaluate Input Impedance of Helical Antenna?

Input Impedance of Helical Antenna evaluator uses Input Impedance = 140*Helix Circumference to evaluate the Input Impedance, The Input Impedance of Helical Antenna formula is defined as travelling wave antenna, which means the current travels along the antenna and the phase varies continuously. In addition, the input impedance is primarily real and can be approximated in Ohms. Normally this is around 140 Ω, though using a different circumference value will affect it. Input Impedance is denoted by Z_h symbol.

How to evaluate Input Impedance of Helical Antenna using this online evaluator? To use this online evaluator for Input Impedance of Helical Antenna, enter Helix Circumference (C_λ) and hit the calculate button.

FAQs on Input Impedance of Helical Antenna

What is the formula to find Input Impedance of Helical Antenna?

The formula of Input Impedance of Helical Antenna is expressed as Input Impedance = 140*Helix Circumference. Here is an example- 112 = 140*0.8.

How to calculate Input Impedance of Helical Antenna?

With Helix Circumference (C_λ) we can find Input Impedance of Helical Antenna using the formula - Input Impedance = 140*Helix Circumference.

Can the Input Impedance of Helical Antenna be negative?

No, the Input Impedance of Helical Antenna, measured in Electric Resistance cannot be negative.

Which unit is used to measure Input Impedance of Helical Antenna?

Input Impedance of Helical Antenna is usually measured using the Ohm[Ω] for Electric Resistance. Megohm[Ω], Microhm[Ω], Volt per Ampere[Ω] are the few other units in which Input Impedance of Helical Antenna can be measured.

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