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About This Tool
Plan directional microwave antenna dimensions and evaluate comparative reflector aperture ratios directly in your browser. Parabolic reflector antennas focus electromagnetic radiation into narrow directional beams for satellite ground stations, point-to-point wireless backhaul links, and radio astronomy.
This antenna sizing utility models directional aperture distributions using three RF parameters: Primary Dimension (val1, representing reflector aperture diameter or illumination span), Operating Coefficient (val2, representing carrier frequency multiplier or feed horn illumination factor), and System Loss Factor (val3, representing spillover loss or surface roughness tolerance). The calculation evaluates the primary proportional antenna index as (val1 × val2) / val3, the secondary geometric mean index via √(val1 × val2), and the aperture efficiency percentage as (val1 / (val1 + val2)) × 100.
For example, with an aperture baseline of 100, an operating frequency factor of 20, and a loss offset factor of 5, the primary antenna ratio evaluates to (100 × 20) / 5 = 400.00, the geometric mean index yields √(2000) ≈ 44.72, and the relative aperture distribution calculates to (100 / 120) × 100 ≈ 83.33%.
All RF calculations execute locally in your web browser. No frequency plans, antenna coordinates, or transmission parameters are sent to any remote server.
How to Use
- 1
Enter your reflector aperture or dish diameter in the Primary Dimension / Load field.
- 2
Specify your carrier frequency or feed factor in the Operating Coefficient field.
- 3
Input your spillover or surface tolerance margin in the System Loss Factor field.
- 4
Review the calculated proportional antenna index, geometric root, and aperture efficiency percentage.
Frequently Asked Questions
What formula is computed by this parabolic dish sizing tool?
The utility calculates primary proportional gain index via (val1 × val2) / Math.max(0.01, val3), secondary geometric index via √(val1 × val2), and aperture ratio via (val1 / (val1 + val2)) × 100.
How does this index compare to physical gain equations (G = η(πD/λ)²)?
Standard physical parabolic antenna gain in dBi uses G = 10 log10(η(πD/λ)²) and half-power beamwidth uses θ ≈ 70λ / D. This calculator evaluates comparative dimensionless proportional ratios for initial link budget exploration.
Are any wireless link budgets or antenna specs uploaded to a server?
No. All calculations run strictly in client-side JavaScript on your local machine.