PHP Helical Antenna Calculator

Note: You must have an SVG viewer installed on your system to view and print the diagrams.

Scalar Absolute Units Notes
Units
Chirality
Frequency MHz λ =
Diameter *λ Diameter of antenna (eg. outer diameter of tubing), between 0.238732616286657 and 0.523352506215006λ
# turns Number of full helix windings
Sλ *Cλ Axial Linear Distance of winding. Between 0.2126 Cλ and 0.2867 Cλ
Ground Diameter *λ Ground Plane Diameter Between 0.8λ and 1.1λ
Resolution dpi Dots per inch for printing
Antenna Length
Read only values.
Cλ *λ Circumfrence of Winding. Valid between 0.75λ and 1.33λ
Gain dBi

Click here for the source code. Note: You need to have php4 on your server and an SVG viewer on your browser. Copyright 2001, Caleb Crome. If you have any questions or comments, contact me