1. What is an Inverted V Dipole?

The Inverted V Dipole is a variation of the standard dipole antenna where the two legs are angled downward, typically between 60-120 degrees. This configuration requires slightly less space than a horizontal dipole and provides a good compromise between performance and installation convenience.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( L \) — Total length of the dipole in feet
• \( f \) — Frequency in MHz
• Height Adjustment Factor — Accounts for height above ground effects (typically 0.98-1.0)
• Angle Adjustment Factor — Accounts for the V angle (typically 0.95-1.0)

Explanation: The basic formula calculates the length for a half-wavelength dipole, with adjustments for the inverted V configuration and height above ground.

3. Importance of Proper Length

Details: Proper antenna length is critical for good impedance matching and radiation efficiency. An inverted V typically requires 2-5% shorter length than a horizontal dipole due to end effects.

4. Using the Calculator

Tips: Enter frequency in MHz. Height and angle are optional but will improve accuracy. For best results, the included angle should be between 90-120 degrees.

5. Frequently Asked Questions (FAQ)

Q1: Why 468 instead of 492?
A: 468 accounts for the velocity factor in typical wire antennas (about 95% of light speed), while 492 would be for free space.

Q2: How does height affect the antenna?
A: Higher installations generally perform better but may require slight length adjustments due to ground effects.

Q3: What's the best angle for an inverted V?
A: 90-120 degrees provides a good compromise between performance and mechanical stability.

Q4: What wire gauge should I use?
A: 12-18 AWG insulated copper wire works well for most installations.

Q5: How precise do I need to be with the length?
A: Within ±1% is good, but you can always prune the antenna for best SWR.