Author Topic: GPS antenna on the aluminum enclosure  (Read 2895 times)

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Offline Vcky_electroTopic starter

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GPS antenna on the aluminum enclosure
« on: July 29, 2019, 07:00:04 am »
Hi ,
I would like to use GPS chip antenna. Where i would to use the antenna on the pcb which is inside the aluminum enclosure. Please suggest me the better GPS antenna. WIll it work inside the enclosure ??

Thanks,
Vicky.
 

Offline hagster

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Re: GPS antenna on the aluminum enclosure
« Reply #1 on: July 29, 2019, 07:39:36 am »
A GPS will not work inside an aluminium enclosure unless there is some form of RF transparent material for the signal to get through.

You have lots of options, but the simplest is to get a panel mount GPS antenna and drill a hole in the box.
 

Offline Vcky_electroTopic starter

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Re: GPS antenna on the aluminum enclosure
« Reply #2 on: August 02, 2019, 04:25:09 pm »
Thanks..

Is there any off the shelf PIFA antenna for GPS ??
 

Offline hagster

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Re: GPS antenna on the aluminum enclosure
« Reply #3 on: August 02, 2019, 07:01:48 pm »
Probably lots, but why do you want a PIFA antenna?

Have a look through the Taoglas catalog and pick one that suits. They are mostly stocked in digikey.

https://www.taoglas.com/product-category/gps-antennas/
 

Offline Vcky_electroTopic starter

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Re: GPS antenna on the aluminum enclosure
« Reply #4 on: August 03, 2019, 03:20:03 am »
PIFA antenna will be easily mounted on enclosure. So I want PIFA antenna.
 

Offline hagster

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Re: GPS antenna on the aluminum enclosure
« Reply #5 on: August 03, 2019, 07:44:41 am »
I haven't seen too many PIFAs or IFA antennas mounted externally on metal enclosures. The occasional multi and car antenna uses this type of antenna, primarally because the PIFA can be made to cover multiple bands, eg GPS + cellular.

A PIFA antenna mounted on a metal enclosure needs to be at 90° to avoid being shorted.

If it's just for GPS, a straight patch antenna is normally more easily mounted and has the advantage of circular polarization.

Obviously I don't have any details on your application or enclosure, so I may be wrong.

If you want something really low profile antenna you could just make a slot antenna using the enclosure. Just cut a half wavelength thin slot in the lid and connect your coax across it. You will need to experiment to tune the feed point correctly. You can seal the slot with silicon or something if needed.
 
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Offline vsmplast

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Re: GPS antenna on the aluminum enclosure
« Reply #6 on: September 17, 2019, 07:44:10 am »
As mentioned by hagster A GPS will not work inside an aluminum enclosure unless there is some form of RF transparent material for the signal to get through.
RF transparent materials are materials where RF fields can penetrate with no heating happen. So far, I know plastic polymer material like Teflon, PPL, PVC, and ABS which are made of plastics and have almost 0 dielectric loss factor.
You have other plastic enclosure options like polycarbonate, Fiberglass (FRP) which also are RF transparent material
« Last Edit: September 17, 2019, 07:58:11 am by vsmplast »
Electrical Junction box manufacturer, supplier
 
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Offline Vcky_electroTopic starter

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Re: GPS antenna on the aluminum enclosure
« Reply #7 on: September 24, 2019, 06:37:05 pm »
Thanks @hagster and @vsmplast for detailed  explanation.
 


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