About This Site
Ron VanVarden (N6ACH) provides practical, easy-to-use calculators for amateur radio operators who want to design and analyze antennas and RF systems. Whether you're building your first dipole or designing a complex beam antenna array, these tools help you get the calculations right the first time.
All calculators are designed to be straightforward and focused on real-world applications. No complex software to install, no registration required - just reliable RF engineering calculations available whenever you need them.
Why These Calculators?
Good antenna design requires accurate calculations, but shouldn't require a PhD in electromagnetics. These tools bridge the gap between theoretical antenna modeling software and back-of-the-envelope calculations.
Each calculator includes:
- Practical results - Dimensions you can actually use for construction
- Real-world considerations - Wire gauge, insulation effects, and construction tips
- Performance data - Gain, bandwidth, and pattern information where applicable
- No-nonsense interface - Quick calculations without unnecessary complexity
About N6ACH Ron VanVarden
Got my Technician class license in 1989 while managing a Radio Shack in Stockton Ca. My store ended up with 6 ham operators making it the go to store at the time.
Upgraded to General in April 2023
I have had programs for calculating antennas ever since I started. They started out as programs in basic language that we kept on the computers at the store, along with some basic programs written by Wayne Overbeck N6NB and James Steffen KC6A. Then when javascript came out I converted the antenna programs to javascript. Then with permission I converted some of Wayne and James' programs to javascript.
The goal is simple: provide fellow hams with reliable tools that make antenna projects more successful and RF system analysis more accessible.
Technical Notes
All calculations are based on established RF engineering principles and have been validated against professional antenna modeling software. While these tools provide accurate results for typical amateur radio applications, complex installations may benefit from full electromagnetic modeling.
The calculators assume standard conditions (copper conductors, typical ground characteristics, etc.) and include practical correction factors based on real-world construction experience.
Remember: Antenna tuning and final adjustments are always recommended, as local environmental factors can affect performance. These calculators give you an excellent starting point for successful antenna projects.