Log Periodic Antenna Calculator
Calculate dimensions, bandwidth ratio, and estimated gain for a log-periodic dipole array antenna.
3
Inputs
Live
Math
3
Related
Enter parameters and click Calculate to view results
Formula & Theory
Ln = L0 × τⁿThis formula is used to calculate antenna parameters for log periodic antenna calculator.
Overview
Log Periodic Antenna helps you calculate design values for a directional antennas project from Center Frequency, Tau Ratio, Number of Elements. Calculate dimensions, bandwidth ratio, and estimated gain for a log-periodic dipole array antenna. 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 Center Frequency, Tau Ratio, Number of Elements exactly in the units shown by this log periodic antenna. Check the operating band, unit prefix, and decimal position before calculating; these are the inputs used by the formula.
- Center Frequency — use MHz.
- Tau Ratio.
- Number of Elements.
Output Guide
The results describe the calculated log periodic 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 Log Periodic Antenna uses Ln = L0 × τⁿ. Supply Center Frequency (MHz), Tau Ratio, Number of Elements in the displayed units, then use the calculated values as the first engineering target for this directional antennas design or analysis.
Design Notes
This directional antennas calculation is based on Ln = L0 × τⁿ. 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 log periodic antenna 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 Log Periodic Antenna calculate?
Calculate dimensions, bandwidth ratio, and estimated gain for a log-periodic dipole array antenna. The calculation provides an initial design value based on Center Frequency (MHz), Tau Ratio, Number of Elements.
Which inputs are needed for the Log Periodic Antenna?
Enter Center Frequency (MHz), Tau Ratio, Number of Elements 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 log periodic antenna?
It follows Ln = L0 × τⁿ. 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 Log Periodic Antenna?
Compare the result with the practical constraints of your directional antennas 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.