[AFMUG] Radomes...

[Robert Andrews]

What do you folks out there see for signal loss when putting a radome on 
a 5 Ghz link?   I was testing today thinking I might see 1db loss and 
was surprised to see more like 2-3 db!   I also had that link go from 
doing 80mb/s in testing to around 70mb/s with the radome...


Best,
Robert

Re: [AFMUG] Radomes...

[Jaime Solorza]

What kind of antenna and radome?

On Nov 8, 2017 8:30 PM, "Robert Andrews"  wrote:

> What do you folks out there see for signal loss when putting a radome on a
> 5 Ghz link?   I was testing today thinking I might see 1db loss and was
> surprised to see more like 2-3 db!   I also had that link go from doing
> 80mb/s in testing to around 70mb/s with the radome...
>
> Best,
> Robert
>

Re: [AFMUG] Radomes...

[Robert Andrews]

2 foot dish looks like a fiberglass radome..

On 11/08/2017 07:44 PM, Jaime Solorza wrote:

What kind of antenna and radome?

On Nov 8, 2017 8:30 PM, "Robert Andrews" > wrote:


What do you folks out there see for signal loss when putting a
radome on a 5 Ghz link?   I was testing today thinking I might see
1db loss and was surprised to see more like 2-3 db!   I also had
that link go from doing 80mb/s in testing to around 70mb/s with the
radome...

Best,
 Robert

Re: [AFMUG] Radomes...

[Jaime Solorza]

Radome  must be manufactured with carefully to avoid causing signal loss
and not just to reduce windload on dish
 Good quality radomes also have shroud to improve noise rejection and link
quality.  Installation must be precise...3dB loss is a concern.  Pictures?

On Nov 8, 2017 8:59 PM, "Robert Andrews"  wrote:

2 foot dish looks like a fiberglass radome..


On 11/08/2017 07:44 PM, Jaime Solorza wrote:

> What kind of antenna and radome?
>
> On Nov 8, 2017 8:30 PM, "Robert Andrews"  i...@avantwireless.com>> wrote:
>
> What do you folks out there see for signal loss when putting a
> radome on a 5 Ghz link?   I was testing today thinking I might see
> 1db loss and was surprised to see more like 2-3 db!   I also had
> that link go from doing 80mb/s in testing to around 70mb/s with the
> radome...
>
> Best,
>  Robert
>
>

Re: [AFMUG] Radomes...

[Robert]

I have a shroud, it's good for a 4 db increase in noise rejection. I'll 
show the radome pics tomorrow...



On 11/8/17 8:23 PM, Jaime Solorza wrote:
Radome  must be manufactured with carefully to avoid causing signal 
loss and not just to reduce windload on dish
 Good quality radomes also have shroud to improve noise rejection and 
link quality.  Installation must be precise...3dB loss is a concern.  
Pictures?


On Nov 8, 2017 8:59 PM, "Robert Andrews" > wrote:


2 foot dish looks like a fiberglass radome..


On 11/08/2017 07:44 PM, Jaime Solorza wrote:

What kind of antenna and radome?

On Nov 8, 2017 8:30 PM, "Robert Andrews"
mailto:i...@avantwireless.com>
>> wrote:

What do you folks out there see for signal loss when putting a
radome on a 5 Ghz link?   I was testing today thinking I
might see
1db loss and was surprised to see more like 2-3 db!  I
also had
that link go from doing 80mb/s in testing to around 70mb/s
with the
radome...

Best,
 Robert

Re: [AFMUG] Radomes...

[Jaime Solorza]

Cool ... night

On Nov 8, 2017 9:54 PM, "Robert"  wrote:

> I have a shroud, it's good for a 4 db increase in noise rejection.   I'll
> show the radome pics tomorrow...
>
> On 11/8/17 8:23 PM, Jaime Solorza wrote:
>
> Radome  must be manufactured with carefully to avoid causing signal loss
> and not just to reduce windload on dish
>  Good quality radomes also have shroud to improve noise rejection and link
> quality.  Installation must be precise...3dB loss is a concern.  Pictures?
>
> On Nov 8, 2017 8:59 PM, "Robert Andrews"  wrote:
>
> 2 foot dish looks like a fiberglass radome..
>
>
> On 11/08/2017 07:44 PM, Jaime Solorza wrote:
>
>> What kind of antenna and radome?
>>
>> On Nov 8, 2017 8:30 PM, "Robert Andrews" > i...@avantwireless.com>> wrote:
>>
>> What do you folks out there see for signal loss when putting a
>> radome on a 5 Ghz link?   I was testing today thinking I might see
>> 1db loss and was surprised to see more like 2-3 db!   I also had
>> that link go from doing 80mb/s in testing to around 70mb/s with the
>> radome...
>>
>> Best,
>>  Robert
>>
>>
>
>

Re: [AFMUG] Radomes...

[Adam Moffett]

0-1 is more like it.
What model of dish is that?


-- Original Message --
From: "Robert Andrews" 
To: af@afmug.com
Sent: 11/8/2017 10:30:11 PM
Subject: [AFMUG] Radomes...

What do you folks out there see for signal loss when putting a radome 
on a 5 Ghz link?   I was testing today thinking I might see 1db loss 
and was surprised to see more like 2-3 db!   I also had that link go 
from doing 80mb/s in testing to around 70mb/s with the radome...


Best,
Robert

Re: [AFMUG] Radomes...

[Robert]

Ubiquiti 2 foot...   I tried some radomes from amazon..   bt

On 11/9/17 7:20 AM, Adam Moffett wrote:

0-1 is more like it.
What model of dish is that?


-- Original Message --
From: "Robert Andrews" 
To: af@afmug.com
Sent: 11/8/2017 10:30:11 PM
Subject: [AFMUG] Radomes...

What do you folks out there see for signal loss when putting a radome 
on a 5 Ghz link?   I was testing today thinking I might see 1db loss 
and was surprised to see more like 2-3 db!   I also had that link go 
from doing 80mb/s in testing to around 70mb/s with the radome...


Best,
Robert

Re: [AFMUG] Radomes...

[Jaime Solorza]

Quality is suspect?  The higher the frequency the more critical precise
measurement is required...

On Nov 9, 2017 8:30 AM, "Robert"  wrote:

> Ubiquiti 2 foot...   I tried some radomes from amazon..   bt
>
> On 11/9/17 7:20 AM, Adam Moffett wrote:
>
>> 0-1 is more like it.
>> What model of dish is that?
>>
>>
>> -- Original Message --
>> From: "Robert Andrews" 
>> To: af@afmug.com
>> Sent: 11/8/2017 10:30:11 PM
>> Subject: [AFMUG] Radomes...
>>
>> What do you folks out there see for signal loss when putting a radome on
>>> a 5 Ghz link?   I was testing today thinking I might see 1db loss and was
>>> surprised to see more like 2-3 db!   I also had that link go from doing
>>> 80mb/s in testing to around 70mb/s with the radome...
>>>
>>> Best,
>>> Robert
>>>
>>
>>
>>

Re: [AFMUG] Radomes...

[Chuck McCown]

The material, thickness and placement all affect radome loss.
Fiberglass is normally the best, the thinner the better.
There is a factor called the loss tangent for most materials used.  The 
lower the better.


But it also has to be spaced such that it is placed in a null in the 
nearfield electrical field.
If it is spaced wrong it can create a bunch of loss.  Spaced right and it 
becomes invisible to the signal.


I would say less than a dB and if done right, less than a half dB.

-Original Message- 
From: Robert Andrews

Sent: Wednesday, November 08, 2017 8:30 PM
To: af@afmug.com
Subject: [AFMUG] Radomes...

What do you folks out there see for signal loss when putting a radome on
a 5 Ghz link?   I was testing today thinking I might see 1db loss and
was surprised to see more like 2-3 db!   I also had that link go from
doing 80mb/s in testing to around 70mb/s with the radome...

Best,
Robert 

Re: [AFMUG] Radomes...

[Jeremy]

We put raydomes on all of our dishes.  I have never done a before and after
comparison.  It is so minimal that we just use them everywhere.

On Thu, Nov 9, 2017 at 9:37 AM, Chuck McCown  wrote:

> The material, thickness and placement all affect radome loss.
> Fiberglass is normally the best, the thinner the better.
> There is a factor called the loss tangent for most materials used.  The
> lower the better.
>
> But it also has to be spaced such that it is placed in a null in the
> nearfield electrical field.
> If it is spaced wrong it can create a bunch of loss.  Spaced right and it
> becomes invisible to the signal.
>
> I would say less than a dB and if done right, less than a half dB.
>
> -Original Message- From: Robert Andrews
> Sent: Wednesday, November 08, 2017 8:30 PM
> To: af@afmug.com
>
> Subject: [AFMUG] Radomes...
>
> What do you folks out there see for signal loss when putting a radome on
> a 5 Ghz link?   I was testing today thinking I might see 1db loss and
> was surprised to see more like 2-3 db!   I also had that link go from
> doing 80mb/s in testing to around 70mb/s with the radome...
>
> Best,
> Robert
>