Half Power Beamwidth Calculator
Introduction & Importance
Half power beamwidth (HPBW) is a crucial parameter in antenna design and communication systems. It defines the angle within which the antenna’s power density is at least half of its maximum value…
How to Use This Calculator
- Enter the frequency in GHz.
- Enter the antenna size in wavelengths (λ).
- Click ‘Calculate’.
Formula & Methodology
The formula for half power beamwidth is derived from the antenna’s radiation pattern and is given by:
HPBW = (79.8 / (D * f)) * (180 / π)
Real-World Examples
Example 1: 5 GHz Wi-Fi Antenna
Frequency: 5 GHz, Antenna size: 0.5λ
HPBW: 31.92 degrees
Data & Statistics
| Frequency (GHz) | Antenna Size (λ) | HPBW (degrees) |
|---|---|---|
| 2.4 | 1 | 79.8 |
| 5 | 0.5 | 31.92 |
| 10 | 1 | 15.96 |
Expert Tips
- Larger antennas result in narrower beamwidths.
- Higher frequencies lead to wider beamwidths.
Interactive FAQ
What is the unit of half power beamwidth?
The unit of half power beamwidth is degrees.
How does half power beamwidth affect communication systems?
HPBW determines the coverage area and interference levels in communication systems.
For more information, see NTIA’s Antenna Theory and Design and ITU-R Recommendation R-566.