Small Loop Antenna Calculator
Calculate radiation resistance, loop dimensions, and electrical characteristics of a small loop antenna.
2
Inputs
Live
Math
3
Related
Enter parameters and click Calculate to view results
Formula & Theory
Rr = 31,200 × (A/λ²)²This formula is used to calculate antenna parameters for small loop antenna calculator.
Overview
Small Loop Antenna helps you calculate design values for a resonant antennas project from Frequency, Loop Diameter. Calculate radiation resistance, loop dimensions, and electrical characteristics of a small loop 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 Frequency, Loop Diameter exactly in the units shown by this small loop antenna. Check the operating band, unit prefix, and decimal position before calculating; these are the inputs used by the formula.
- Frequency — use MHz.
- Loop Diameter — use cm.
Output Guide
The results describe the calculated small loop 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 Small Loop Antenna uses Rr = 31,200 × (A/λ²)². Supply Frequency (MHz), Loop Diameter (cm) in the displayed units, then use the calculated values as the first engineering target for this resonant antennas design or analysis.
Design Notes
This resonant antennas calculation is based on Rr = 31,200 × (A/λ²)². 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 small loop 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 Small Loop Antenna calculate?
Calculate radiation resistance, loop dimensions, and electrical characteristics of a small loop antenna. The calculation provides an initial design value based on Frequency (MHz), Loop Diameter (cm).
Which inputs are needed for the Small Loop Antenna?
Enter Frequency (MHz), Loop Diameter (cm) 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 small loop antenna?
It follows Rr = 31,200 × (A/λ²)². 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 Small Loop Antenna?
Compare the result with the practical constraints of your resonant 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.