J-Pole Antenna Calculator — Free Online Tool
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J-Pole Antenna Calculator

Calculate physical element lengths for a half-wave J-Pole antenna

Instructions: Enter the operating frequency ($f$) to compute the lengths of the half-wave radiator element and the quarter-wave matching stub.
Antenna Parameters

Calculation Results

⚠️ For radio frequency and antenna engineering education reference only. Actual physical dimensions may vary slightly depending on conductor diameter and mounting environment.

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