Yagi-Uda Antenna Calculator
Calculate Yagi-Uda antenna dimensions, boom length, gain, front-to-back ratio, beamwidth, and recommended installation parameters.
3
Inputs
Live
Math
3
Related
Enter parameters and click Calculate to view results
Formula & Theory
Reflector = 0.505λ, Driven = 0.475λ, Director = 0.450λThis formula is used to calculate antenna parameters for yagi-uda antenna calculator.
Overview
Yagi-Uda Antenna Calculator supports directional antennas planning with a practical calculation based on the displayed inputs.
Input Guide
Enter Frequency, Number of Directors, Element Spacing Factor exactly in the units shown by this yagi-uda antenna. Check the operating band, unit prefix, and decimal position before calculating; these are the inputs used by the formula.
- Frequency — use MHz.
- Number of Directors — use count.
- Element Spacing Factor — use λ.
Output Guide
The results describe the calculated yagi-uda 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 Yagi-Uda Antenna uses Reflector = 0.505λ, Driven = 0.475λ, Director = 0.450λ. Supply Frequency (MHz), Number of Directors (count), Element Spacing Factor (λ) in the displayed units, then use the calculated values as the first engineering target for this directional antennas design or analysis.
Design Notes
Installed performance can vary with frequency, losses, tolerances, environment, and system configuration.
Build and Tuning Notes
Use the result as a starting point, then validate the completed system with measurement or simulation.
Frequently Asked Questions
What does the Yagi-Uda Antenna Calculator calculate?
It calculates the applicable design or performance value from the inputs shown.
How should I use the result?
Confirm units and operating conditions before applying it to the system design.
Why can results differ in practice?
Physical installation, materials, losses, and measurement conditions affect real-world 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.