1. What is a Long Wire Antenna Length Calculator?

Definition: This calculator determines the optimal length for a long wire antenna based on the harmonic number and wavelength.

Purpose: It helps radio enthusiasts and engineers design efficient wire antennas for various frequency bands.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Length \) — Total antenna length (meters)
• \( n \) — Harmonic number (integer)
• \( \lambda \) — Wavelength (meters)

Explanation: The formula calculates antenna lengths that are multiples of half-wavelength, which are optimal for efficient radiation.

3. Importance of Proper Antenna Length

Details: Correct antenna length ensures maximum power transfer, proper impedance matching, and optimal radiation pattern.

4. Using the Calculator

Tips: Enter the harmonic number (typically 1 for fundamental frequency) and the wavelength in meters. Both values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is the harmonic number (n)?
A: It represents the number of half-wavelengths in the antenna (1=half-wave, 2=full-wave, etc.).

Q2: How do I find the wavelength?
A: Wavelength (λ) = Speed of light (300,000,000 m/s) / Frequency (Hz). Use our Wavelength Calculator if needed.

Q3: What's the most common harmonic number?
A: n=1 (half-wave) is most common, but higher numbers can be used for multi-band operation.

Q4: Does this account for velocity factor?
A: No, for precise calculations, multiply the result by the wire's velocity factor (typically 0.95-0.98).

Q5: Can I use this for dipole antennas?
A: Yes, but remember a dipole is two wires each λ/4 long for n=1.