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    Data input
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Helix antenna design and construction details

Input data (design requirements)

Design frequency MHz
Number of turns
Turn spacing wavelengths

The results

Legend. The letters in the image are used in the table below.

To get a large version, click on the image.

Wavelength
mm
Ideal diameter (internal) D= mm
Gain
dBi
Conductor diameter d= mm
Winding step (between centers) S= mm
Separation of the adapter section a= mm
Total conductor length
mm
Minimum reflector diameter R= mm
Total antenna length L= mm

Design performance

Bandwidth (@ -1dB) Fmax/Fmin:

Fmax: MHz

Fmin: MHz
Bandwidth (@ -3dB) Fmax/Fmin:

Fmax: MHz

Fmin: MHz
Beam width (@ -3dB)
degrees