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Antentop is FREE e-magazine devoted to Antennas and Amateur Radio an

Special page devoted to

HF Helical Antennas: Theory and Practice

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ANTENTOP- 01- 2020, # 024

HF Helical Antennas: Theory and Practice

 

 

 

Picture 3 Common View a Helical Antenna without Cover

However, files for radio amateurs contain very limited data on operation and design of the helical antennas. It is may be explained (in my opinion) by the fact that the helical antenna sometimes cannot be repeated by amateur with predicted result and simulating antenna software that available for amateur and still have limitations that cannot allow calculating a shortened helical antenna in right way. You may still found in the internet some old software for simulating HF helical antenna that may run on Windows XP- 32 bit (for example, classical G4FCQ simulating software, References 1) however the modern Windows 10 kills all of the old simulation software.

 

This article gives some explanation to the practical design and to some theory of the HF helical antenna. Hope it helps radio amateur to do experiment with the antennas. The article was written by me based on my practical experience and experiments with helical antennas. Of course, these experiments still could not provide complete clarity on all questions of the theory of operation of HF helical antennas.

 

 

Picture 4 Screen Shot of the G4FCQ Simulating Software

 

 

Moreover, I understand that the methodology of mine experiments have been criticized, the equipment used in the experiments were home-made that could be also based for somebody for criticizing and denied some of mine conclusions. However in the experimenters I have got repeatable results when designing shortened HF helical antennas and found some patterns in the design and operation of the HF helical antennas. On the base I provide recommendations on the design and use of the HF helical antennas in amateur conditions.

I hope that radio amateurs, who will continue do experiments with HF helical antennas, will be able to obtain more detailed data on the operation of the antennas and on the base design HF helical antennas with predictable parameters. And, of course, do complete the article.

 

 

 

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Last Updated:

January 29, 2021 22:22

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