Fitting a Permanent Broadband Antenna on the Roof

Jun 21, 2019
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I think the need for a ground plane varies. The one MotorhomeWiFi sell doesn't need one according to their website. The Poynting one I bought says it needs one 40cm square.
But I guess it's a bit like the cables, they will work with long cables but there will be some signal loss and they will also work without a ground plane - but I suspect they work better with one.
However, the science of antennae is very complex and I am certainly no expert. :)
Really curious to know how you get a water tight seal between the ground plane, attena and roof without breaking continuity with sealants?
 
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DBK

DBK

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Really curious to know how you get a water tight seal between the ground plane, attena and roof without breaking continuity with sealants?
Interesting question. A later post says a ground plane isn't required - I misread/misunderstood something. :) But if it was required you would need to add an earthing connection I guess, or just secure the plate with self-tappers sealed with a gunk/mastic and similarly bodge a connection between the antenna and the ground plane. But as it isn't required this probably isn't an issue. Although the phrase "not required" makes me slightly suspicious. Does it mean "not required" or "not essential" in other words is performance improved with one but it performs as claimed without one? I might see if I can ground mine easily and see if anything changes. :)
 
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Jun 4, 2016
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I ended up using the nut to secure mine as our roof is lined and insulated with like 2" thick fibre foam.
Can't notice that much difference at home ,but that is due to us having a good signal at home. i'll know better once we get away on our next outing :)
 
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Silver-Fox

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Can I ask, if you fit one of these aerials you can hard wire this back to a suitable MiFi unit?

Sorry if this is a stupid question but I’m not great with this type of technology 🙄
 
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DBK

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Thank you 👍

In that case I’m presuming you can buy a MiFi unit that you hard wire to.
I ask because the one I have you can’t.

Lastly do you make your own cables up and are they like coax for the tv.
You need a suitable mifi which has two aerial connections such as the Huawei E5577. This has TS9 connections so you need cables with TS9 ends. These are co-ax cables but much thinner than TV aerial cable. The Poynting antenna has SMA connections so you need SMA to TS9 adaptors or a cable with SMA at one end and TS9 at the other. Something like this, although I can't remember if it needs male or female SMA. :)

Amazon product
www.amazon.co.uk/sourcing-map-RG316-Coaxial-Antenna/dp/B07TF6R8SX
 

Silver-Fox

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You need a suitable mifi which has two aerial connections such as the Huawei E5577. This has TS9 connections so you need cables with TS9 ends. These are co-ax cables but much thinner than TV aerial cable. The Poynting antenna has SMA connections so you need SMA to TS9 adaptors or a cable with SMA at one end and TS9 at the other. Something like this, although I can't remember if it needs male or female SMA. :)

Amazon product
www.amazon.co.uk/sourcing-map-RG316-Coaxial-Antenna/dp/B07TF6R8SX
Thank you for the info.

This is something I need to set up as I’m sure it will come in handy once we start invading Europe on our travels.

I’m wondering if it’s worth putting a ground plane under the aerial.
I see in a previous post it says may not be required.
 
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Something like this, although I can't remember if it needs male or female SMA. :)

Amazon product
www.amazon.co.uk/sourcing-map-RG316-Coaxial-Antenna/dp/B07TF6R8SX
These are the ones I used for mine, Female SMA
 
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Jun 4, 2016
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All these debates about to use or not to use a grounding plate, surely when installing it on a PVC with a metal roof surely with the metal securing bolt making contact with the metal roof, makes the whole roof act as a grounding plate.??
 
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All these debates about to use or not to use a grounding plate, surely when installing it on a PVC with a metal roof surely with the metal securing bolt making contact with the metal roof, makes the whole roof act as a grounding plate.??
It would if it touched the metal roof but mine has a covering stuck to the underside so it doesn't make contact - but it would be fairly easy to arrange for it to do so. :)
 
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Interesting question. A later post says a ground plane isn't required - I misread/misunderstood something. :) But if it was required you would need to add an earthing connection I guess, or just secure the plate with self-tappers sealed with a gunk/mastic and similarly bodge a connection between the antenna and the ground plane. But as it isn't required this probably isn't an issue. Although the phrase "not required" makes me slightly suspicious. Does it mean "not required" or "not essential" in other words is performance improved with one but it performs as claimed without one? I might see if I can ground mine easily and see if anything changes. :)
A groundplane doesn't need to contact the roof. If the aerial needed a groundplane the aerial base would have a metallic contact for it. The type of aeria, you are installing will involve a crossed dipole construction that cannot make use of a groundplane.
 
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DBK

DBK

Jan 9, 2013
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A groundplane doesn't need to contact the roof. If the aerial needed a groundplane the aerial base would have a metallic contact for it. The type of aeria, you are installing will involve a crossed dipole construction that cannot make use of a groundplane.
It's all beyond me but in the graphs published by Poynting showing the performance of the antenna, in the notes it specifically says the tests were done with a 40cm square ground plane. However, mine works well mounted as it is on the roof. :)

Bottom of page 2 in this download:

 
Aug 6, 2013
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It's all beyond me but in the graphs published by Poynting showing the performance of the antenna, in the notes it specifically says the tests were done with a 40cm square ground plane. However, mine works well mounted as it is on the roof. :)

Bottom of page 2 in this download:

It appears to use a number of vertical aerials arranged to maximise gain. I wasn't aware that it covered so many bands or that it was MIMO on two of them. So a ground plane would work - but still doesn't need to be connected to the roof :).
 
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