Antenna Length Calculator

Step-by-Step Guide to Using the Antenna Length Calculator

This guide will provide you with detailed instructions on how to effectively use the Antenna Length Calculator. This tool will help you determine the suitable antenna length based on frequency, antenna type, and velocity factor. Follow the steps below to make accurate calculations.

Step 1: Enter the Frequency

Frequency (MHz)

• Select the input field labeled Frequency (MHz).
• Enter the frequency value in megahertz (MHz) that you wish to use for your calculations.
• The frequency value must be a number between 0.1 and 3000 MHz, with a step size of 0.1.
• This field is required, so make sure you input a valid frequency value.

Step 2: Select the Antenna Type

Antenna Type

• Select one of the available antenna types from the dropdown list:
• Quarter Wave (¼λ)
• Half Wave (½λ)
• Full Wave (1λ)
• 5/4 Wave
• 3/2 Wave
• This selection determines the relative size of the antenna in relation to the wavelength.
• This field is required, so ensure you select an appropriate antenna type.

Step 3: Select the Velocity Factor

Velocity Factor

• Select the applicable velocity factor from the dropdown menu:
• Bare Wire (0.95)
• Insulated Wire (0.93)
• PVC Insulated Wire (0.82)
• Polyethylene (0.66)
• The velocity factor represents the speed of the signal in the antenna compared to the speed of light in a vacuum.
• This field is required, so make sure you choose a relevant velocity factor.

Step 4: Review the Results

Once you have entered all the required fields, the calculator will automatically compute the following results:

• Wavelength in Meters: Calculated using the formula 300 / frequency. The result will be displayed with two decimal places.
• Wavelength in Feet: Calculated as (300 / frequency) * 3.28084. The result will also include two decimal places.
• Antenna Length in Meters: This uses the formula (300 / frequency) * antennaType * velocityFactor. It will be formatted to two decimal places.
• Antenna Length in Feet: Calculated as ((300 / frequency) * antennaType * velocityFactor) * 3.28084 with two decimal places displayed.
• Antenna Length in Inches: Displayed following the calculation ((300 / frequency) * antennaType * velocityFactor) * 39.3701 with one decimal place for precision.

Ensure all inputs are accurately entered to facilitate precise calculations. Review the outputs which will guide you in choosing the appropriate antenna length for your specific application.