Antennas Part III: DIY HF Antenna for Ionospheric Propagation - DC to Daylight

In this application-based video, Derek makes use of the general knowledge of dipole antennas that he's gained to create a simple two-element antenna that provides some directivity. By introducing a reflector near the driven element, he can manipulate and direct the RF energy in one direction.

He'll also talk a bit about the ionosphere, the evolution of our antenna from dipole to the Moxon design, and cover the build process of his DIY antenna. Lastly, he takes the new rig out to the park for a test run to try and contact some folks in different countries!

#0:00 Welcome to DC to Daylight
#0:57 Antenna
#2:59 Modeling
#6:06 Sketch
#9:01 Contact!
#11:40 Give Your Feedback

#antenna #antennas #radiofrequency #dipole #maxwellequations

[tmann]

I’m a mechanical engineering student right now. I’m in my first circuits class and we are learning about AC. This is so cool. Thank you for inspiring me to get into amateur radio! I learned so much watching this and the previous 3 videos.

[MacNala]

Hi, I was just tuning through youtube and your antenna series I found very interesting. I am a little too old to be taking up Amateur Radio again. My first licence was from where I was in Scotland and was GM3OGJ, first licenced in 1960. Good luck with the antenna series. 73s

[alfatech]

Good to see the final result of the theory 👍

[Allan_aka_RocKITEman]

FWIW: I live in North Carolina now, but I was born & raised in St. Pete. I also lived in Dade County for about 7 years.

Flip-flops are DEFINITELY mandatory. I _still_ wear them here in NC as long as weather permits.

[imyf]

That video is so cool and interesting! Why only 16K views? Super underrated. Congrats on your content.

[russellgovette]

Thank you for the education. Just acquired my tech license, studying for a general class certification. Love to fabricate and plan to build my antennae.

[elementpresents]

Thanks for joining us to learn more about antennas! What'd you think? Here's some more links you may find useful:

[wodowiesel]

nice antenna! im looking forward doing my license this or next year in germany 73

[MT-ccfz]

What was the actual SWR reading on the antenna. I like the gain you get and the directionality of this antenna.

[gicacoca]

Thank you for explaining so well. God bless you!

[JohnTrefethen]

Out of curiosity, how did the theoretical SWR match the real-world SWR?

[supune]

Did you use the same antenna to both transmit and receive?

[BenTrem]

FL to QC on 28?! lovely!
p.s. Moxon is a new one for me. thanks!
--VE6IU

[tomleach]

Nice
I’m an EE but RF has always been black magic.

On directional antennas.
I like WWII technology stuff
Could you do a video on the Huffduff project?

Came out of UK

They put the systems on ships to instantly get a bearing on a submarines transmission.

With shore Huffduffs and ship huffduffs they could cross bearings to get a location.

But, no sweeping of the antenna to find the highest signal strength.

I’m guessing two antennas mounted 90 degrees to each other with electronics to do the best angle.

I’ve never seen anyone dig into the antenna and RF physics.

Thanks again for your work.

[jamesdunham]

This was great. What is the best way to study and then take the test for my Technician license?

[jonahzsong]

Great presentation, Derek. I've read a bit about the Moxon, but didn't appreciate nor grasp its directional gain over a 2-element Yagi.

73 de N6BVZ/4 (north Georgia) Wil.

[JamiesHackShack]

Great vid. I've been wanting to play with a 10m moxon for years. Maybe I'll finally do it now! 😂

[NotSure]

I love your engineering approach to HAM radio. There is a lot of "just do this, and it'll work". Yeah, but WHY!?!?!

[seanlynchbp]

Good contact. I think I have worked that guy on 20 meter.

[joe-kbrcr]

Hi Derek. I just ran across this video while searching on diy anrenna projects. I've been interested in the moxon for a while now and since it seems to keep showing up in my searches, it may be a sign it look further into them. Also, I will be looking into your element14 community. It sounds like something i would find interesting. How can i find more information on your moxon antenna such as more information on the fiberglass poles and where i might find them. 73 de Joe KB9RCR