Vivaldi Antenna Calculator
Calculate approximate dimensions and bandwidth parameters for a Vivaldi tapered slot antenna.
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Inputs
Live
Math
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Related
Enter parameters and click Calculate to view results
Formula & Theory
Width ≈ λ(low)/2, Length ≈ λ(low), Bandwidth Ratio = f(high)/f(low)This formula is used to calculate antenna parameters for vivaldi antenna calculator.
Overview
Vivaldi Antenna helps you calculate design values for a ultra wideband antennas project from Low Frequency, High Frequency. Calculate approximate dimensions and bandwidth parameters for a Vivaldi tapered slot 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 Low Frequency, High Frequency exactly in the units shown by this vivaldi antenna. Check the operating band, unit prefix, and decimal position before calculating; these are the inputs used by the formula.
- Low Frequency — use GHz.
- High Frequency — use GHz.
Output Guide
The results describe the calculated vivaldi 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 Vivaldi Antenna uses Width ≈ λ(low)/2, Length ≈ λ(low), Bandwidth Ratio = f(high)/f(low). Supply Low Frequency (GHz), High Frequency (GHz) in the displayed units, then use the calculated values as the first engineering target for this ultra wideband antennas design or analysis.
Design Notes
This ultra wideband antennas calculation is based on Width ≈ λ(low)/2, Length ≈ λ(low), Bandwidth Ratio = f(high)/f(low). 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 vivaldi 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 Vivaldi Antenna calculate?
Calculate approximate dimensions and bandwidth parameters for a Vivaldi tapered slot antenna. The calculation provides an initial design value based on Low Frequency (GHz), High Frequency (GHz).
Which inputs are needed for the Vivaldi Antenna?
Enter Low Frequency (GHz), High Frequency (GHz) 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 vivaldi antenna?
It follows Width ≈ λ(low)/2, Length ≈ λ(low), Bandwidth Ratio = f(high)/f(low). 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 Vivaldi Antenna?
Compare the result with the practical constraints of your ultra wideband 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.