Antenna Length Calculator Formula

Antenna Length Formula:

\[ Length = \frac{c}{f \times k} \]

Antenna Length (meters):

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1. What is an Antenna Length Calculator?

Definition: This calculator determines the optimal length of an antenna based on the frequency of operation and the wave factor.

Purpose: It helps radio enthusiasts, engineers, and technicians design antennas for specific frequency ranges.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ Length = \frac{c}{f \times k} \]

Where:

\( Length \) — Antenna length (meters)
\( c \) — Speed of light (3×10⁸ m/s)
\( f \) — Frequency (Hz)
\( k \) — Wave factor (typically 4 for quarter-wave antennas)

Explanation: The antenna length is inversely proportional to the frequency and wave factor.

3. Importance of Antenna Length Calculation

Details: Proper antenna length ensures optimal signal transmission and reception, maximum efficiency, and impedance matching.

4. Using the Calculator

Tips: Enter the frequency in Hz and wave factor (default 4 for quarter-wave). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is the wave factor?
A: The wave factor determines what fraction of the wavelength the antenna should be (4=¼ wave, 2=½ wave, 1=full wave).

Q2: What frequency range is this calculator for?
A: It works for any frequency, from HF to microwave bands.

Q3: Does this account for velocity factor?
A: No, for more precise calculations, multiply the result by the cable's velocity factor (typically 0.66-0.95).

Q4: How do I convert MHz to Hz?
A: Multiply MHz by 1,000,000 (e.g., 146 MHz = 146,000,000 Hz).

Q5: What about different antenna types?
A: Adjust the wave factor accordingly (e.g., dipole=2, monopole=4).