Amplify signal in a waveguide

[johan]

Hello members,

is it possible to amplify the signal passing through the waveguide of the Dish

Mvg

 

[primestar31]

Hello members,

is it possible to amplify the signal passing through the waveguide of the Dish

Mvg

Sure, that's the function of the LNA part of it all. Low Noise AMPLIFIER.

 

[johan]

From a copper pipe I made a wave pipe for the dish to experiment with. Now I want to amplify that signal. How?!

 

[primestar31]

From a copper pipe I made a wave pipe for the dish to experiment with. Now I want to amplify that signal. How?!

Put an lnb at the end of it. Use your "wave pipe" in place of the round wave GUIDE.

 

[johan]

Put an lnb at the end of it. Use your "wave pipe" in place of the round wave GUIDE.

I have already done that, and I have a picture. But can that signal still be amplified in that pipe ?!

 

[johan]

is from the internet, but have about the same

 

[NYDutch]

The signal can not be amplified before it reaches the antenna that's after the wave guide.

 

[johan]

Okay
Shame.
new idea, new opportunities

 

[primestar31]

Okay
Shame.
new idea, new opportunities

You could always use a HOTTER LNB, as they do exist. If say your present one is rated at 35k noise degrees & 60dB, find one that's 15k degrees, and 70dB for instance.

 

[johan]

You could always use a HOTTER LNB, as they do exist. If say your present one is rated at 35k noise degrees & 60dB, find one that's 15k degrees, and 70dB for instance.

My intention was to make a double reflection with a (2nd) Sub-reflector of a Gregorian antenna like the one in the picture, but that didn't work for me.

 

[harshness]

Unless OTARD is in play wouldn't the logical choice be to go for a larger dish rather than trying to boost a poor signal?

The application of reasoning will never overcome Physics.

 

[johan]

I'm not talking about a bad signal either, but want to use several small dishes.
just for fun and see if it works or goes.

 

[harshness]

I'm not talking about a bad signal either, but want to use several small dishes.

Reliable satellite reception is difficult enough without trying to complicate it with a water feature approach.

 

[Bobby]

Unless OTARD is in play wouldn't the logical choice be to go for a larger dish rather than trying to boost a poor signal?

The application of reasoning will never overcome Physics.

Johan is in Holland. I seriously doubt that OTARD counts there!

 

[johan]

No OTARD hier.

Have my own house, and have my dish (90 cm) Gregorian dish in the living room behind glass. Excellent image.

 

[arlo]

You know what? I'm going to jump in here. I commend your concept Johan.
Couple of problems. Since you wish to amplify what you have, surely a 'hotter' LNA probably could be fashioned.
Analog Devices has a lot of developer board LNA's ready to go. Even the Gerber files to piece together your own incantation. As far as degrees kelvin versus dB gain, snr. That's your baby.
Unless the subreflector were redesigned into a different geometry or perhaps a multi faceted arrangement.
Each individual parabolic antenna is its own parabola. Combining many to focus in one spot. Not sure if that exists.
Like the James Webb and other telescopes. Each individual mirror is part of a single unit. A larger parabola.
If each mirror were its own parabola. It couldn't work. For optics anyway.
Dishes don't normally have long focal lengths. Try it with a stack of magnifying make-up or bathroom mirrors and see how difficult it would be to arrange them and focus the sun in a single spot on paper.
Different results if you were to have a large mirror and cut it into facets and separate them. The parabola curve would seem to me to carry on and be manageable if you spread them out. Dimples on a golf ball comes to mind. A bit hard if not impossible to get a smooth curve out of them if you cut them out individually.
Microwaves are nuts. Even the smallest deviation in alignment of multiple collected signals would send the antenna out of phase and subtract signal. Haha. "Mr. Heterodyne" still exists in everything RF to this day.

 

[harshness]

Johan is in Holland. I seriously doubt that OTARD counts there!

Nonetheless, OTARD is the only reason I can think of to use undersized dishes.

 

[arlo]

Hey Harshy!
Google translate this!
The Brits are even more lucky. They have the TV police knocking on your portal to the wullllld.

Vergunningvrije (schotel)antennes

Het plaatsen van (schotel)antennes voor de ontvangst van radio of TV-signalen en sprietantennes kan vergunningvrij zijn.

iplo.nl

• The diameter of the antenna is not more than 2 m
  
  
  
  .

 

[harshness]

• The diameter of the antenna is not more than 2 m

Do you consider that a "small dish"?

 

[arlo]

Do you consider that a "small dish"?

Nah