This is BD7PDW, and I just completed my first satellite communication link today. This article will describe the process of going from having the idea to actually launching a satellite.However, writing articles myself is terrible because I am a product of the Chinese education system that has been left behind.
My interest in satellite communication started with the desire to build an antenna.
During the summer, I interned at a company, but I didn't have much to do. In my free time, I started reading various articles, including the ARRL handbook, antenna handbooks, and many personal articles and CQ magazine content on QSL.net. Gradually, I began to think about making my own antennas. However, at that time, I didn't have any specific ideas about building a satellite antenna; I just wanted to try making something by hand. I thought the whisk antenna looked really cool, so I was interested in trying to make one.I was thinking it would be great to also be able to communicate with satellites.
I decided to build an antenna, but I haven't done so yet because I will be moving to a very distant location soon.
However, after I had actually finished moving everything, I realized that my abilities were probably not sufficient to operate a mixer, so I could only make eight-wood.
The U7V4 configuration uses an eight-pole data arrangement, which is based on the online $4 antenna design. However, I modified it by converting the two sets of poles into a vertical arrangement. This was done because I felt that the original arrangement caused the UV signals to point in different directions, and I wanted to see if this new configuration would work without any issues.
I'm starting to work on the antenna.
Tools: Soldering iron, solder, hot glue, hot glue gun, copper wire, cut copper tubing (approximately 1 meter long), M-to-M cable, square cross-section plastic tubing (1 meter).
- After measuring, mark the corners of the square tube, then use a soldering iron to create a hole.
- Create a large opening near the resonator's "hole" where the feed line can be connected.
- Insert copper wire into the holes of the resonator tube, and then use the copper wire to pull it out from the large hole in the resonator. Securely fix the resonator using hot glue.
- Cut the feeder cable, straighten the outer layer and twist it into a single line, and expose the inner layer directly.
- The two pieces of copper wire are soldered together, and the exposed ends of the feed lines are fixed in place with hot melt adhesive.
Then I finished it.
I had already joined the satellite group and been observing them secretly, as well as preparing the software, before starting to build the antenna.
The software was used to directly search on GitHub, and also to check what others were looking for in the group.What do everyone like?FM broadcast to satellite
Once you're ready, bring your antenna, radio, and phone along to find a good location for satellite communication.
Tense
After adjusting the frequency and position based on the software, I was able to hear them. Unfortunately, after responding and announcing my own call sign, I forgot to announce theirs, so I had to confirm who it was during the recording. However, some people say that if you listen carefully enough, you can tell who is speaking from above, so I still have a lot to learn.
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