Spiral Antenna Calculator
Calculate the dimensions and bandwidth characteristics of an Archimedean spiral antenna.
3
Inputs
Live
Math
3
Related
Enter parameters and click Calculate to view results
Formula & Theory
Outer Diameter ≈ λmax/π, Inner Diameter ≈ λmin/πThis formula is used to calculate antenna parameters for spiral antenna calculator.
Overview
Spiral Antenna Calculator provides calculator-specific guidance for the displayed engineering inputs and result.
Input Guide
Enter Lowest Frequency, Highest Frequency, Number of Turns exactly in the units shown by this spiral antenna. Check the operating band, unit prefix, and decimal position before calculating; these are the inputs used by the formula.
- Lowest Frequency — use GHz.
- Highest Frequency — use GHz.
- Number of Turns.
Output Guide
The results describe the calculated spiral antenna 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 Spiral Antenna uses Outer Diameter ≈ λmax/π, Inner Diameter ≈ λmin/π. Supply Lowest Frequency (GHz), Highest Frequency (GHz), Number of Turns in the displayed units, then use the calculated values as the first engineering target for this resonant antennas design or analysis.
Design Notes
Actual results depend on installation, materials, losses, tolerances, and operating conditions.
Build and Tuning Notes
Validate the calculated target with measurement or simulation before finalising the system.
Frequently Asked Questions
What does the Spiral Antenna Calculator calculate?
It calculates the relevant value from the displayed inputs.
How should I use the result?
Verify the units and intended operating conditions before implementation.
Why can measured results differ?
Real installations and measurement conditions affect performance.
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.