LPDA Antenna Calculator
A free tool to compute LPDA antenna element sizes, spacings, and gain estimates, ideal for RF engineers, technicians, and hobbyists designing directional antennas.

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About This Tool
The LPDA Antenna Calculator is a powerful online tool that simplifies the process of designing and analyzing Log-Periodic Dipole Arrays. By inputting your desired frequency range, the tool automatically computes the appropriate element lengths, spacings, and number of elements based on standard antenna theory formulas.
This calculator is particularly useful for RF engineers, amateur radio enthusiasts, and antenna designers seeking quick and accurate results without manual calculations. The software can also estimate the antenna's gain and impedance at specific frequencies, aiding in performance optimization.
Whether you're developing new antenna systems or studying antenna characteristics, this tool provides vital data in an accessible format, downloadable export options, and a user-friendly interface that guides you through each step of the calculation process.
How to Use
1. Enter the minimum and maximum operational frequencies.
2. Optionally specify the frequency for impedance/gain evaluation.
3. Click the 'Calculate' button.
4. View detailed results including element lengths, spacings, and your optional parameters.
5. Use copy or export features to save results, or reset to start new calculations.

FAQs/Additional Resources
Find Quick Answers
What is an LPDA antenna?
How does this calculator determine element sizes?
Can I estimate antenna gain with this tool?
Is this tool suitable for professional antenna design?
Does the calculator support custom antenna configurations?
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