How to build inexpensive, simple ham radio antennas.
Half-Square Antenna.
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If you need a monoband HF antenna with a low takeoff angle and a modest gain of 3.6 dBi, then this Half-Square Antenna project from Tim (K5OHY) is for you!
Time takes us through the full design, construction, testing, and use phases of this impressive antenna.
This antenna is suitable for both portable and home station use.
If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=4k77IYFNVjs.
Thanks for joining us today.
Aloha es 73 de Russ (KH6JRM0.
Here are some comments from Tim (K5OHY):
In this video, I head out to the park to build and test the Half-Square antenna.
This simple full-wavelength wire antenna has some impressive features: about 3.6 dBi of gain broadside and a low takeoff angle, making it excellent for DX.
I’ll cover the basic configuration, show some modeling results, set it up in the field, and compare it to a vertical using the RBN and KiwiSDR. Finally, I’ll put it on the air and see how it performs with real contacts.
The Half-Square consists of two vertical ¼-wavelength wires connected by a ½-wavelength horizontal wire. It can be built as a simple current-fed monoband antenna or as a voltage-fed multiband antenna using a 49:1 unun.
Learn more about portable antennas: https://portable-antennas.com
Chapters
0:00 Intro
0:45 What is the Half-Square?
1:09 Two ways to feed
2:06 Modeling
8:40 Deployment
10:50 SWR Readings
13:19 RX vs Quarter-wave
14:30 RBN Test
16:51 KiwiSDR Comparison
18:55 Activation
19:46 Conclusion
How this was made
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