Antenna Comparison Review (Lots of antennas inside)

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swwifty
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Re: Antenna Comparison Review (Lots of antennas inside)

Post by swwifty » Mon Jun 03, 2019 8:18 am

That seems consistent with lots of multipathing. I'd recommend reading about it, if you are interested. The topic itself is a very complex and intriguing issue in wireless channels.

I have lots of multipath on band 2, but band 12 is not as bad. My multipathing was so bad, antennas 12 inches apart had 10x less signal more often than not.

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terryjett
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Re: Antenna Comparison Review (Lots of antennas inside)

Post by terryjett » Sun Oct 20, 2019 8:31 pm

Excellent information! Been playing with few home brew antennas trying to find best AT&T band for my area (lots of trees and tower about 4 miles away). Your info helps a lot, thank you.
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swwifty
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Re: Antenna Comparison Review (Lots of antennas inside)

Post by swwifty » Mon Oct 21, 2019 10:53 am

terryjett wrote:
Sun Oct 20, 2019 8:31 pm
Excellent information! Been playing with few home brew antennas trying to find best AT&T band for my area (lots of trees and tower about 4 miles away). Your info helps a lot, thank you.
you're welcome, glad it was useful to you!
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terryjett (Tue Oct 22, 2019 7:52 pm)

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terryjett
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Re: Antenna Comparison Review (Lots of antennas inside)

Post by terryjett » Tue Oct 22, 2019 8:02 pm

Quick question:

"Location: My home, in the North East GA Mountains For reference, below is a screenshot"

Could you share what software / website you used to create the the screenshot that mapped the terrain? Looks very useful...

Thanks!
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swwifty
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Re: Antenna Comparison Review (Lots of antennas inside)

Post by swwifty » Tue Oct 22, 2019 8:32 pm

terryjett wrote:
Tue Oct 22, 2019 8:02 pm
Quick question:

"Location: My home, in the North East GA Mountains For reference, below is a screenshot"

Could you share what software / website you used to create the the screenshot that mapped the terrain? Looks very useful...

Thanks!
I used the Radio Mobile Website to do it: https://www.ve2dbe.com/english1.html

Be warned its not the most trivial website to use. If you want just a quick mapping of the terrain profile, you can use https://link.ui.com/
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terryjett (Tue Oct 22, 2019 8:35 pm)

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BillA
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Re: Antenna Comparison Review (Lots of antennas inside)

Post by BillA » Thu Jan 02, 2020 10:57 pm

The high mount antenna also makes a great lightning rod. xD
Jokes aside, I wouldn't dare put them up higher than any other nearby metallic object even with the best built-in lightning arrester, while the other end of the antenna cable is connected to the router sitting right on my work desk. Yikes!

swwifty
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Re: Antenna Comparison Review (Lots of antennas inside)

Post by swwifty » Fri Jan 03, 2020 12:23 pm

BillA wrote:
Thu Jan 02, 2020 10:57 pm
The high mount antennas makes a great lightning rod. xD
Jokes aside, I wouldn't dare put them up higher than any other nearby metallic object even with the best built-in lightning arrester, while the other end of the antenna cable is connected to the router sitting right on my work desk. Yikes!
Yeah, if I lived some place with no trees I'd be worried too.

I have a lot of trees higher than my mast, so no worries there.

pistolaro2
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Re: Antenna Comparison Review (Lots of antennas inside)

Post by pistolaro2 » Tue May 19, 2020 12:08 pm

swwifty wrote:
Thu May 30, 2019 6:55 pm
Sorry I'm just getting around to responding to this.

I separated the antennas based on the wavelength they are operating at. Since B12 is the longest wave length in LTE around 700mhz I tried to separate them at least one wave length which is about 17 inches.

That is really odd that you saw better performance with the antennas facing backwards. Are you sure the antenna was actually not backwards before you turned it around? I mean rather, are you sure you know where the tower is? Antennas have a concept called front to back ratio (look it up on Google) which should mean that you should have much worse signal if the antenna was actually backwards.
swwifty, regarding the 17 inches - are you measuring between N connectors - or something else?

Edit - I see previous post where you wrote 'no closer than 17 inches at any point'. I'm clear.

Are they installed parallel or at 45?

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