1. What is Antenna Power Calculation?

Definition: This calculator determines the power delivered to an antenna using the voltage and resistance values.

Purpose: It helps radio engineers, hobbyists, and technicians ensure proper power delivery to antennas for optimal performance.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P \) — Power (watts)
• \( V \) — Voltage (volts)
• \( R \) — Resistance (ohms)

Explanation: The voltage squared is divided by the resistance to calculate the power delivered to the antenna.

3. Importance of Antenna Power Calculation

Details: Proper power calculation ensures efficient signal transmission, prevents equipment damage, and helps meet regulatory requirements.

4. Using the Calculator

Tips: Enter the voltage in volts and resistance in ohms (default 50Ω for many RF systems). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why is resistance often set to 50 ohms?
A: 50 ohms is a standard impedance for many RF systems, providing a balance between power handling and low loss.

Q2: What happens if my antenna impedance doesn't match?
A: Impedance mismatch causes power reflection (SWR issues), reducing effective radiated power.

Q3: How do I measure voltage for this calculation?
A: Use an RF voltmeter or oscilloscope to measure RMS voltage at the antenna feed point.

Q4: Does this account for antenna efficiency?
A: No, this calculates input power. Actual radiated power depends on antenna efficiency.

Q5: What's a typical voltage range for antenna systems?
A: Varies widely - from a few volts for small devices to thousands for high-power transmitters.