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Antenna for digital TV

79 posts in this topic

,,, no, my antenna is better ... !!!

,,,simply the best...!!!

I will give you a demonstration for the 470-820 MHz frequency band....!!!

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51 minutes ago, Admin said:

I will give you a demonstration for the 470-820 MHz frequency band....!!!

Ok. Make it using the 75 Ohm connector I gave you today.

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,,,let's see ...!!!

,,, for me a 75 Ohm connector is very simple to do >>> !!!

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I will give you a demonstration for the 470-820 MHz frequency band....!!!

????.......

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,,,okay,thanks my friend...!!!

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Hello boys

I think that building patch antenna for tv UHF band is a pure wasting of material

and it is large and ia heavy, it is something like you wish to drive a cae but u use truck..

there are far elegant solutions 

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For example like i do, i doubt in first what to build and now i am happy with reception with my double biquad 

with aluminim wires and standard baloon transformer

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,,, okay, but you can ensure a bandwidth of 350MHz .... ???

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bandwith of 350Mhz ?

what is that ? i am not sure...here where i am there is no any TV station that emit on 350Mhz in DBV-T all of them are above 470MHz

so if you can pick up lower then you must recalc biquad dimensions which must be more larger

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Digital terrestrial television (DTTV or DTT, or DTTB with "broadcasting"),,,for the 470-820 MHz frequency band(820-470=350MHz bandwidth  )

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It is DVB-T - digital video broadcasting - terrestrial

ok so range is 350MHz,,,, so you mean is he can cover whole range 

He can if the size is for 470MHz...

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,,, yes, see previous posts...!!!!

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,,,that's it Super flat/thin antenna DELTA Н117А.F-5V...???


 

delta_n117af_rezonator.jpg

WP_000330.jpg

 

 

 

 

выкройка118.JPG

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,,, and the results that do not seem too good...!!!

 

Spoiler

129.jpg

 

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В вашей модели слева и справа пропущены два бортика. Рефлектор П образный. 

Фото оригинального рефлектора есть в статье. http://dvbpro.ru/obzor-naruzhnoj-antenny-delta-n117a-f-5v/

В моей пробной модели бортики сделаны из фольги  единым целым с рефлектором. Высота их порядка 28 мм.

 

 

In your model, two sides are missing on the left and right. P-shaped reflector.

A photo of the original reflector is in the article. http://dvbpro.ru/obzor-naruzhnoj-antenny-delta-n117a-f-5v/

In my trial model, the sides are made of foil as a unit with a reflector. Their height is about 28 mm.

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And of course look inside. The dimensions of the base reflector 256х287 mm:

And on the sides there are plates 28х269 mm. the Distance between them — 244 mm side 

The overall dimensions of the resonator — 228х268 mm, its width in the middle slightly smaller — 210 mm.

The distance between the resonator plate and the reflector 29 mm.

Amplifier Board is soldered at a distance of 89 mm from the top edge:

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20 minutes ago, Admin said:

Расстояние между ними - 244 мм на стороне

Здесь он похоже ошибся или измерил между торцами пластин. Реально между пластинами больше чем 244. Размер должен быть порядка 260 мм, то есть совпадать с шириной рефлектора

 

Here he seems to have made a mistake or measured between the ends of the plates. In reality, there is more than 244 between the plates. The size should be about 260 mm, that is, it must coincide with the width of the reflector

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2 hours ago, TUL said:

Здесь он похоже ошибся или измерил между торцами пластин. Реально между пластинами больше чем 244. Размер должен быть порядка 260 мм, то есть совпадать с шириной рефлектора

 

Here he seems to have made a mistake or measured between the ends of the plates. In reality, there is more than 244 between the plates. The size should be about 260 mm, that is, it must coincide with the width of the reflector

Правильный размер 244 мм. За бортиками на фото ими закрыты отверстия крепления рефлектора к корпусу антенны.

В моём варианте получилось почти 256 мм.

 

The correct size is 244 mm. Behind the sides in the photo, they closed the holes for mounting the reflector to the antenna body.

In my version it turned out almost 256 mm.

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,,, correct if you want my drawing above...!!!

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Here is another loop antena for tv 

 

 

Spoiler

Loop2.png

 

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,,,okay Aurel,I"ll try to make a simulation with your wire TV antenna....!!!

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", not TUL, I think this antenna is not broadband...!!!

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,,, at the request of the" vars-cat "user, I tried to simulate this batwing antenna.for the 470-820 MHz frequency band..

 

Spoiler

screenshot_1231.jpg

 

 

Spoiler

screenshot_1234.jpg

 

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