Antenna Bandwidth Calculator
Calculate antenna bandwidth, center frequency, fractional bandwidth, bandwidth ratio, quality factor, and bandwidth classification.
2
Inputs
Live
Math
3
Related
Enter parameters and click Calculate to view results
Formula & Theory
BW = fH − fL, FBW = (BW ÷ fC) ×100, Q = fC ÷ BWThis formula is used to calculate antenna parameters for antenna bandwidth calculator.
Overview
Antenna Bandwidth helps you calculate design values for a basic antenna parameters project from Lower Frequency, Upper Frequency. Calculate antenna bandwidth, center frequency, fractional bandwidth, bandwidth ratio, quality factor, and bandwidth classification. 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 Lower Frequency, Upper Frequency exactly in the units shown by this antenna bandwidth. Check the operating band, unit prefix, and decimal position before calculating; these are the inputs used by the formula.
- Lower Frequency — use MHz.
- Upper Frequency — use MHz.
Output Guide
The results describe the calculated antenna bandwidth 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 Antenna Bandwidth uses BW = fH − fL, FBW = (BW ÷ fC) ×100, Q = fC ÷ BW. Supply Lower Frequency (MHz), Upper Frequency (MHz) in the displayed units, then use the calculated values as the first engineering target for this basic antenna parameters design or analysis.
Design Notes
This basic antenna parameters calculation is based on BW = fH − fL, FBW = (BW ÷ fC) ×100, Q = fC ÷ BW. 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 antenna bandwidth 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 Antenna Bandwidth calculate?
Calculate antenna bandwidth, center frequency, fractional bandwidth, bandwidth ratio, quality factor, and bandwidth classification. The calculation provides an initial design value based on Lower Frequency (MHz), Upper Frequency (MHz).
Which inputs are needed for the Antenna Bandwidth?
Enter Lower Frequency (MHz), Upper Frequency (MHz) 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 antenna bandwidth?
It follows BW = fH − fL, FBW = (BW ÷ fC) ×100, Q = fC ÷ BW. 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 Antenna Bandwidth?
Compare the result with the practical constraints of your basic antenna parameters 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.