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Open toolAntenna Near Field Calculator
Estimate conventional reactive near-field and Fraunhofer far-field boundaries. Provide Wavelength (m), Largest antenna dimension (m) to compute results directly in your browser. Reactive estimate = 0.62 sqrt(D³/λ); far-field estimate = 2D²/λ. These are commonly used electrically large antenna estimates, not universal boundaries for every antenna shape or electrically small radiator. Numeric output uses up to 12 significant digits; floating-point rounding can occur.
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How the Antenna Near Field Calculator Works & Core Formula
The Antenna Near Field Calculator evaluates Wavelength (m), Largest antenna dimension (m) in client-side JavaScript using the deterministic rule below and updates the output panel immediately without uploading data to a server.
Estimate conventional reactive near-field and Fraunhofer far-field boundaries.
Reactive estimate = 0.62 sqrt(D³/λ); far-field estimate = 2D²/λ. These are commonly used electrically large antenna estimates, not universal boundaries for every antenna shape or electrically small radiator. Numeric output uses up to 12 significant digits; floating-point rounding can occur.
Antenna Near Field Calculator Quick Reference & Input Guide
Review the input parameters, allowed value ranges, and worked reference cases for the Antenna Near Field Calculator below before running your calculation.
| Parameter / Scenario | Default / Sample Value | Rule or Allowed Range | Output / Usage Note |
|---|---|---|---|
| Input: Wavelength (m) | 0.1 | Range: 1e-09 to 1000000000.0 | Required workspace parameter |
| Input: Largest antenna dimension (m) | 1 | Range: 1e-09 to 1000000000.0 | Required workspace parameter |
| Worked Case 1: Baseline run (Wavelength (m) = 0.1) | Preloaded / test values | Estimate conventional reactive near-field and Fraunhofer far-field boundaries | Wavelength (m) = 0.1; Largest antenna dimension (m) = 1. Output: Reactive near-field estimate: 1.9606121493 m; Fraunhofer far-field estimate: 20 m; Dimension / wavelength: 10; Model condition: Conventional electrically large antenna estimates; boundaries are not universal. |
| Worked Case 2: Comparison scenario (antenna near field and far field distance ) | Preloaded / test values | Estimate conventional reactive near-field and Fraunhofer far-field boundaries | Wavelength (m) = 0.5; Largest antenna dimension (m) = 2. Output: Reactive near-field estimate: 2.48 m; Fraunhofer far-field estimate: 16 m; Dimension / wavelength: 4; Model condition: Conventional electrically large antenna estimates; boundaries are not universal. |
Step-by-Step Guide to Using the Antenna Near Field Calculator
Follow these three steps to configure Wavelength (m), Largest antenna dimension (m), verify unit and boundary rules, and export your Antenna Near Field Calculator output.
Input and settings
Check units and mode
Reactive estimate = 0.62 sqrt(D³/λ); far-field estimate = 2D²/λ. These are commonly used electrically large antenna estimates, not universal boundaries for every antenna shape or electrically small radiator. Numeric output uses up to 12 significant digits; floating-point rounding can occur.
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Select Calculate, check the labelled result, then use Copy result or Download result.txt.
Review the details
Practical Worked Examples for Antenna Near Field Calculator
These concrete scenarios illustrate how the Antenna Near Field Calculator processes baseline inputs, comparison checks, and boundary constraints.
Baseline run (Wavelength (m) = 0.1)
Wavelength (m) = 0.1; Largest antenna dimension (m) = 1. Output: Reactive near-field estimate: 1.9606121493 m; Fraunhofer far-field estimate: 20 m; Dimension / wavelength: 10; Model condition: Conventional electrically large antenna estimates; boundaries are not universal.
Comparison scenario (antenna near field and far field distance )
Wavelength (m) = 0.5; Largest antenna dimension (m) = 2. Output: Reactive near-field estimate: 2.48 m; Fraunhofer far-field estimate: 16 m; Dimension / wavelength: 4; Model condition: Conventional electrically large antenna estimates; boundaries are not universal.
Boundary & unit check (Antenna Near Field Calculator)
When solving for 'antenna near field calculator', verify that Wavelength (m), Largest antenna dimension (m) use consistent units and stay within the documented scope: Reactive estimate = 0.62 sqrt(D³/λ); far-field estimate = 2D²/λ. These are commonly used electrically large antenna estimates, not universal boundaries for every antenna shape or electrically small radiator. Numeric output uses up to 12 significant digits; floating-point rounding can occur.
How to Read and Verify the Antenna Near Field Calculator Output
The output panel reports the exact result derived from Wavelength (m), Largest antenna dimension (m) alongside any unit or formatting notes.
Every calculation follows the rule: Estimate conventional reactive near-field and Fraunhofer far-field boundaries. Because JavaScript uses IEEE 754 double-precision floating-point arithmetic, numeric outputs display up to 12 significant digits where applicable.
Always cross-check the displayed result against the scope note (Reactive estimate = 0.62 sqrt(D³/λ); far-field estimate = 2D²/λ. These are commonly used electrically large antenna estimates, not universal boundaries for every antenna shape or electrically small radiator. Numeric output uses up to 12 significant digits; floating-point rounding can occur) before applying the value to production specifications, financial models, or lab records.
Scope Limits, Accuracy Assumptions & Related Everyday Math Tools
Review these boundary constraints and validation rules before relying on the Antenna Near Field Calculator output.
Operational scope: Reactive estimate = 0.62 sqrt(D³/λ); far-field estimate = 2D²/λ. These are commonly used electrically large antenna estimates, not universal boundaries for every antenna shape or electrically small radiator. Numeric output uses up to 12 significant digits; floating-point rounding can occur. Inputs that violate minimum/maximum bounds or required format rules are rejected with a clear diagnostic prompt.
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Open toolFrequently Asked Questions About Antenna Near Field Calculator
Answers about using Antenna Near Field Calculator and understanding its results.
What formula or rule does the Antenna Near Field Calculator use?
The Antenna Near Field Calculator applies the rule: Estimate conventional reactive near-field and Fraunhofer far-field boundaries. Enter Wavelength (m), Largest antenna dimension (m) into the workspace and the tool computes the exact output in your browser.
What input parameters and units are required for Antenna Near Field Calculator?
Yes. Provide Wavelength (m), Largest antenna dimension (m) using the documented units and format shown in the quick reference table above. Preloaded default values let you test the workflow immediately.
What are the accuracy limits and boundary assumptions for Antenna Near Field Calculator?
Reactive estimate = 0.62 sqrt(D³/λ); far-field estimate = 2D²/λ. These are commonly used electrically large antenna estimates, not universal boundaries for every antenna shape or electrically small radiator. Numeric output uses up to 12 significant digits; floating-point rounding can occur. Confirm that your inputs fall within the allowed ranges before exporting the result.
Is the Antenna Near Field Calculator free and does it keep my inputs private?
Yes. All calculations for the Antenna Near Field Calculator execute 100% locally in your browser's JavaScript runtime. No inputs or results are uploaded to any external server.
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