iBurst Antennae

[Radiant Antennas]

Ps

While we are at it....how do you do this quoting thing that looks so smart?

 

[bdt]

Firstly about splitters....if you have a box that has one input connector and two outputs (a splitter), and you put in a signal of 100mW....you get a theoretical 50mW from each connector....each one -3dB's.
No splitter is perfect, so insertion loss is added...lets use your -0.6dBs, thus your loss at each connector is -3dBs + (-0.6dBs)....total -3.6dB....understand so far??

Um no, whatever you've got going there I'm not getting you at all, but that's OK: I don't need to.

Now take your 12dBi yagi....add another, get another 3dB's......total 15dBi.
Connect each one into the splitter........-3dB (and the -0.6, but this is negligable)....and you are back to 12dB......where you get 9 from beats me, and why you think this 9 is better than your starting 12 is a mystery.

No-o-o, and maybe I didn't make it clear enough, but this game is all about compromise: I start with an HGA of a nominal 12dBi gain, I *lose* an amount of it by way of a splitter (in this case), co-ax (that I try to keep as short as possible) and the inevitable distance/terrain influences and see if it's still worth doing. But being in the RF game you're supposed to know this ..yes?

 

[bdt]

While we are at it....how do you do this quoting thing that looks so smart?

There's that button on the bottom RHS of a posting labelled "quote" ..give that a try. But beyond that, you use [.quote] at the start of a block you want to mark and [./quote] at the end (obviously without the '.' I've added in there to make the command visible here).

 

[Radiant Antennas]

Um no, whatever you've got going there I'm not getting you at all, but that's OK: I don't need to.

No-o-o, and maybe I didn't make it clear enough, but this game is all about compromise: I start with an HGA of a nominal 12dBi gain, I *lose* an amount of it by way of a splitter (in this case), co-ax (that I try to keep as short as possible) and the inevitable distance/terrain influences and see if it's still worth doing. But being in the RF game you're supposed to know this ..yes?

I think you are off point now.....path loss and coax attenuation is not part of the equation....we are talking about paralleling antennas through a splitter to 'improve' signal.....maybe you are having second thoughts.

And more so.....the two antennas you are comparing are different in gain specifications...your years of experience and successes in the field are substantiated by specs, not because panels are by default better than yagi's......

Ok....enough now.....we have work to do.

 

[bdt]

I think you are off point now.....path loss and coax attenuation is not part of the equation....we are talking about paralleling antennas through a splitter to 'improve' signal.....maybe you are having second thoughts.

Ah HAH! I think I see where we're diverging: it seems you're under the impression I'm talking about aiming two antennas at one tower, yes? (which I get from you saying 'paralleling antennas') ..what I REALLY intend to do is aim one at (say) the Hyde Park BS and the other at (say) somewhere in Sandton or Randburg: this gives me feeds off the two towers so, in the event of one going down (and based on my MyWi experience (read:misery)) Hyde Park likes to go down like a cheap hooker (it's REALLY attractive to lightning) I have a decent signal off the other one. And n, no second thoughts: I'm very clear on what I aim to achieve and the likliehood of a worthwhile result.

And more so.....the two antennas you are comparing are different in gain specifications...your years of experience and successes in the field are substantiated by specs, not because panels are by default better than yagi's......

Actually, they're listed as:

- Yagi: 11dBi gain, 47deg. beamwidth
- panel: 12dBi gain, 40deg. beamwidth
​

But I know I far prefer to install a flat panel as that (seemingly small) 7degrees does make a difference (notwithstanding the aesthetics, which counts when you're violating someone's roofline and they're paying for it!)

Ok....enough now.....we have work to do.

Quite!

 

[Radiant Antennas]

better!!

Ooookay....now I got you.
Remember the original question from Mze....How to improve signal strength?"...your answer was to use two antenna through a splitter....that was alittle misleading...but what you are saying now....isn't.
This design.....you can call it a design, is a much better alternative, its like putting up an omni...but only looking in two directions...thus dual redundant, and less noise ingress.

OK...now we are talking about the same thing, and I agree.....good one!!
Cheers

 

[bdt]

Ooookay....now I got you.
Remember the original question from Mze....How to improve signal strength?"...your answer was to use two antenna through a splitter....that was alittle misleading...but what you are saying now....isn't.
This design.....you can call it a design, is a much better alternative, its like putting up an omni...but only looking in two directions...thus dual redundant, and less noise ingress.

OK...now we are talking about the same thing, and I agree.....good one!!
Cheers

Heh, so glad to have cleared that up - now if you could just fix your website (it is TRULY diabolical in Ff), I would count this a successful day in getting through.. (gimme an email address to send to and I'll email screenshots)

 

[Radiant Antennas]

Heh, so glad to have cleared that up - now if you could just fix your website (it is TRULY diabolical in Ff), I would count this a successful day in getting through.. (gimme an email address to send to and I'll email screenshots)

I know....Its about to be re-built from the ground up....have had many complaints about viewing with FF.
We are predominately military antenna company, and they don't usually visit the website.....so I never worried too much, but I will get it sorted.
Many thanks.

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