Detection Antenna Update: Spiral Conical Antenna Design


Inspired by the University of Illinois antenna designs and SuperKuh more improvised design along with some other references I found online when searching Google images, I decided to make a ~400MHz to 1GHz+ range spiral conical antenna starting with single and double bottom fed designs like Andrew McNeil's spiral conical design videos and then a double top fed design like SuperKuh using household electrical wiring since I have some. 




Some reference feed-line connector and math dimensions to consider (Note: update with better image with wavelength ratio specs), though for the bottom fed design I'll refer to Andrew McNeil's design beginning with a non-log spacing design.  

 Another design to consider for a final antenna with consideration regarding polarity where two antennas have a right hand polarization and two have a left hand polarization so to encompass the range of polarization (other than elliptical et.al.) that is not shown in this picture. 


I already had started working on the form for the SuperKuh street cone like design and will use as a jig to wind prior to placing on the form I've been working on in the next image. The cardboard still needs a coating of what I'm planning to use to harden, 
i.e. a mixture of Titebond 2 Premium and Durham's Rock Hard Water Putty.  Then maybe a coat of polyester fiberglass resin to waterproof if needed. 




Double Helical on jig using Andrew McNeil design.



The image that inspired the cardboard, plywood or like Delrin design prototype.


An interesting design to keep in mind for future studies.




Comments

  1. I've also been working on a more standardized ~450MHz antenna for use with the How to Make a Directed Energy Weapon Detection System for Under $50 with the latest references at the time of this post here on Facebook for now: ~450MHz Yagi Antenna for Re-Radiation Testing

    ReplyDelete

Post a Comment

Popular posts from this blog

Ultrasonic Projects and others

Electronics and RF Engineering Projects - Spectrum Analyzer Adapter for Oscilloscope