Polarization Loss Calculator
Calculate Polarization Loss Factor (PLF), power coupling efficiency, and cross-polarization discrimination for linear, circular, and elliptical antenna alignment.
5
Inputs
Live
Math
3
Related
Enter parameters and click Calculate to view results
Formula & Theory
PLF = cos²(Δθ) [Linear] | PLF = 0.5 (3 dB) [Linear-Circular] | Loss(dB) = -10 log10(PLF)This formula is used to calculate antenna parameters for polarization loss calculator.
Overview
Polarization Loss helps you calculate design values for a rf conversion project from Mode (0:Linear-Linear, 1:Linear-Circular, 2:Circular/Elliptical), Tilt / Alignment Angle Offset (Δθ), Tx Axial Ratio (AR₁), Rx Axial Ratio (AR₂), Circular Sense (0: Same Hand, 1: Opposite Hand). Calculate Polarization Loss Factor (PLF), power coupling efficiency, and cross-polarization discrimination for linear, circular, and elliptical antenna alignment. Use the result to make an informed first design decision before choosing hardware, setting dimensions, or evaluating the RF system in its final environment.
Input Guide
Enter Mode (0:Linear-Linear, 1:Linear-Circular, 2:Circular/Elliptical), Tilt / Alignment Angle Offset (Δθ), Tx Axial Ratio (AR₁), Rx Axial Ratio (AR₂), Circular Sense (0: Same Hand, 1: Opposite Hand) exactly in the units shown by this polarization loss. Check the operating band, unit prefix, and decimal position before calculating; these are the inputs used by the formula.
- Mode (0:Linear-Linear, 1:Linear-Circular, 2:Circular/Elliptical).
- Tilt / Alignment Angle Offset (Δθ) — use °.
- Tx Axial Ratio (AR₁) — use dB.
- Rx Axial Ratio (AR₂) — use dB.
- Circular Sense (0: Same Hand, 1: Opposite Hand).
Output Guide
The results describe the calculated polarization loss values for the inputs you entered. Check each value against the available space, selected components, feed system, and operating conditions before making a final design decision.
How This Calculator Works
The Polarization Loss uses PLF = cos²(Δθ) [Linear] | PLF = 0.5 (3 dB) [Linear-Circular] | Loss(dB) = -10 log10(PLF). Supply Mode (0:Linear-Linear, 1:Linear-Circular, 2:Circular/Elliptical), Tilt / Alignment Angle Offset (Δθ) (°), Tx Axial Ratio (AR₁) (dB), Rx Axial Ratio (AR₂) (dB), Circular Sense (0: Same Hand, 1: Opposite Hand) in the displayed units, then use the calculated values as the first engineering target for this rf conversion design or analysis.
Design Notes
This rf conversion calculation is based on PLF = cos²(Δθ) [Linear] | PLF = 0.5 (3 dB) [Linear-Circular] | Loss(dB) = -10 log10(PLF). Real-world accuracy depends on factors such as material properties, losses, mounting, nearby conductors, ground interaction, feed-line effects, and construction tolerance. Confirm the final system with measurement or simulation.
Build and Tuning Notes
Apply the polarization loss result as an initial target, then validate it in the intended installation. Keep the physical layout and feed arrangement consistent while testing, change one parameter at a time, and record the measured outcome before making another adjustment.
Frequently Asked Questions
What does the Polarization Loss calculate?
Calculate Polarization Loss Factor (PLF), power coupling efficiency, and cross-polarization discrimination for linear, circular, and elliptical antenna alignment. The calculation provides an initial design value based on Mode (0:Linear-Linear, 1:Linear-Circular, 2:Circular/Elliptical), Tilt / Alignment Angle Offset (Δθ) (°), Tx Axial Ratio (AR₁) (dB), Rx Axial Ratio (AR₂) (dB), Circular Sense (0: Same Hand, 1: Opposite Hand).
Which inputs are needed for the Polarization Loss?
Enter Mode (0:Linear-Linear, 1:Linear-Circular, 2:Circular/Elliptical), Tilt / Alignment Angle Offset (Δθ) (°), Tx Axial Ratio (AR₁) (dB), Rx Axial Ratio (AR₂) (dB), Circular Sense (0: Same Hand, 1: Opposite Hand) using the displayed units. Each value directly affects the calculated result, so confirm the unit and operating conditions before running the calculation.
How accurate is this polarization loss?
It follows PLF = cos²(Δθ) [Linear] | PLF = 0.5 (3 dB) [Linear-Circular] | Loss(dB) = -10 log10(PLF). It is accurate for the formula assumptions, but installed performance can change because of materials, loss, environment, mounting, nearby objects, and measurement uncertainty.
What should I do after using the Polarization Loss?
Compare the result with the practical constraints of your rf conversion system, then validate the completed design with appropriate measurement equipment or simulation.
Alex Warren
B.Sc. in Electrical & Electronic Engineering (EEE)
Alex specialises in antenna design and wave propagation. His expertise helps ensure these calculators present practical RF concepts, useful design estimates, and clear engineering guidance for students, HAM operators, and wireless professionals.