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DIY passive antenna for digital TV

Antennas
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10 comments
+1
Reply To quote A complaint
Sometimes you have to deal with the reception of digital TV. And I want to say that with a normal signal, it perfectly takes on a small piece of wire. With a weak signal, this antenna will not help. As for the fact that she is not directed, I do not agree. And if you add an amplifier, then you need to put it right after the antenna, this is important. And further. No need for 50 ohm and thin cables. At such frequencies, each linear meter of even a good cable already makes a noticeable attenuation. Honestly, I didn’t understand why to use a cable as the antenna itself, I think it would be better to fork out a silver-plated wire or use a Soviet silver-plated cable, using a braid. Which is shown, I know what shit it is made of. Braid iron and aluminum foil. The central core, at best copper, but also met iron. It can not always be soldered with acid. Sorry for being blunt.
0
Reply To quote A complaint
Of course, it differs from a piece of wire for the better due to directivity and a narrower strip. It simply cannot be presented as a universal solution for any digital TV. Like any antenna, it must be calculated based on their frequency of the received signal.
+1
Reply To quote A complaint
And how does this differ from a simple piece of wire? With a confident reception, I stick everything that is stuck into the nest (screwdriver, nail, ...). And I do not complain about the quality.
Guest Stanislav Vychugzhanin +1
Reply To quote A complaint
Such an antenna works well.
0
Reply To quote A complaint

I threw the amplifier out of this antenna, rested it in the attic, directed (approximately) to the source and ALL SUPER.
+1
Reply To quote A complaint
You started your article with a false promise that it
omnidirectional antenna

If this seemed to you, then it means that you have ideal reception conditions and a strong signal (no matter how the antenna is, the signal is), for which such an antenna is enough.
To understand what kind of antenna it is, you should indicate the frequencies of your multiplexes and the reception conditions.
+3
Reply To quote A complaint
andresto
the benefit of this product is very fast!
Recently, I’ve bungled my work: monitor + HDMI-to-VGA + digital set-top box + computer speakers, but I didn’t think about the antenna! I had to whip up just stupidly stick a piece of the mounting wire.
I was very surprised and even amazed at the excellent reception of the signal
good
Author -1
Reply To quote A complaint
Seeing such an antenna on YouTube, I was also very skeptical at first, but since all the components were at hand, having made it, I was very surprised and even amazed at the excellent signal reception.
Therefore, before you harass anything and rush into theoretical calculations, I advise you to do it yourself and try it out in practice, since this product is made very quickly!
+2
Reply To quote A complaint
Antenna from those who made antennas from beer cans. Where it takes on a piece of wire, this will work. You are absolutely right that everything depends only on the frequencies and reception conditions (distance to the transmitting antenna, terrain, location of the receiving antenna).
But I don’t agree about the log-periodic period. If the frequency spacing of the first and second multiplexes is large and the signal is not too strong, then I agree. And if, as in Ivanovo, for example, TVK 57 (762 MHz) and TVK 59 (778 MHz), then broadband is not required, you can use narrowband, and if you also have a sufficiently strong signal, then, especially, a log-periodic signal is not required. If you argue, without delving into the details of a particular place, then - yes, LPA will be a universal solution.
+4
Reply To quote A complaint
for digital terrestrial television.

The antenna receives electromagnetic radiation - radio waves. Radio waves absolutely on the drum, what information is transmitted with their help - analog or digital. Therefore, any mention of the word “digital” in the text is just noodles on the reader’s ears.
I specially drew for myself the wiring diagram of this antenna. I did not understand what happened in the end. The inner core forms an ordinary loop vibrator. Braid what role does it play? It looks a little like a matching device.
If the antenna is still a vibrator, then it is directional. And it receives a signal with the least loss perpendicular to its plane.
The article is like a stuffing - I did something, I don’t know what, and you repeat and praise.
But seriously, a log-periodic antenna is needed to receive a digital TV signal. Why she, read on thematic sites.

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