Antennas Part III: DIY HF Antenna for Ionospheric Propagation - DC to Daylight
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- Опубликовано: 19 июн 2024
- 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!
Discuss the episode and ask Derek questions on the element14 Community! bit.ly/3zt5wm8
Antennas Part II: Radiation Demo & Antenna Modeling: bit.ly/3J5eDO8
Antennas Part I: Exploring the Fundamentals of Antennas: bit.ly/3IIVEKl
Link to the prop.kc2g tool: prop.kc2g.com/
Link to the moxgen.exe tool: ac6la.com/moxgen1.html
Engage with the element14 presents team on the element14 Community - suggest builds, find project files and behind the scenes video: bit.ly/3tmdewv
Visit the element14 Community for more great activities and free hardware: bit.ly/3q6YMpu
Tech Spotlights: bit.ly/3qPrDhM
RoadTest and Reviews: bit.ly/3pV5Bux
Project14: bit.ly/31wbnJY
#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 
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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.
FL to QC on 28?! lovely!
p.s. Moxon is a new one for me. thanks!
--VE6IU
nice antenna! im looking forward doing my license this or next year in germany 73
Good luck! -Derek
Great job with the video Derek 👍
Thanks!
Good to see the final result of the theory 👍
And soooo much fun putting something like this together. Simulations are cool and everything, but making the thing work is the exciting part (at least to me).
Glad to see it’s all come together!
Thanks Sterling and thanks for taking time to nerd out about antennas.
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.
Thank you for explaining so well. God bless you!
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.
This is super good
Thank You for sharing 👍👌
Thanks for watching Marek. -Derek
7:47 the finger tap to get busy 😂
Nice work Derek, thanks for sharing! 73 - Dino KLØS
Thanks Dino. Antennas are a blast to make, so this one was cake!
Great vid. I've been wanting to play with a 10m moxon for years. Maybe I'll finally do it now! 😂
It was pretty easy once I got my hands on all the components. I'd say the most difficult part was the hub.. Good luck. -Derek
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.
Thanks Wil. I need to spend some more time with it, but from the simulations, it looks like the front to back is a little better than a standard Yagi.
I love your engineering approach to HAM radio. There is a lot of "just do this, and it'll work". Yeah, but WHY!?!?!
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
👍👍
This was great. What is the best way to study and then take the test for my Technician license?
James,
If you like reading, I suggest "the easy way ham books". Great study guide that teaches you the correct answers to your ham exam. In two weeks you'll be ready to sit and pass whichever class exam you choose to take, except for the extra class license. That will take a little bit more time 😉
Good luck, and don't hesitate! We are around the height of this solar cycle, and you will be able to make the best of a technicians license talking on the 10 meter band. Best wishes!
I think the signal reflects not refrect the signal , refraction will let the signal penetrate through the ionosphere , right ??
With RF traveling through the ionosphere it's a gradual bending of the propagated signal, which is frequency dependent, so it's said to refract. Optics texts are usually more cut and dry, mostly ignoring the wavelength (I assume because it's comparatively short), stating that if bounced off a plane then it's reflection, otherwise it's refraction. At 28MHz it's getting bent as it travels through the ionosphere so isn't like a direct reflection off a mirror. Great question though! -Derek
Thanks for joining us to learn more about antennas! What'd you think? Here's some more links you may find useful:
Ask Derek questions on the element14 Community! bit.ly/3zt5wm8
Antennas Part II: Radiation Demo & Antenna Modeling: bit.ly/3J5eDO8
Antennas Part I: Exploring the Fundamentals of Antennas: bit.ly/3IIVEKl
Link to the prop.kc2g tool: prop.kc2g.com/
Link to the moxgen.exe tool: ac6la.com/moxgen1.html
I need ur help...i am working on a project called damage detection of road pavement using piezo sensors....can u help me on that topic
Hi Mr A. This sounds like an interesting project. I would definitely recommend joining the community in this instance. There are many folks at e14 that would probably have experience with piezo transducers, maybe even industry experts.
@element14presents >>> 👍👍