GPS Antenna Base Plate grounded to Chassis or Not?

Information about using GPS units with motec devices

GPS Antenna Base Plate grounded to Chassis or Not?

Postby DynoDom on Thu Nov 23, 2023 12:42 am

Hello

On a composite roof, does the base plate need to be "earthed" to the chassis?

TIA
D
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Re: GPS Antenna Base Plate grounded to Chassis or Not?

Postby NathanB on Thu Nov 23, 2023 8:12 am

Hi Dom,

The MoTeC L10 GPS does not require to be earthed via the casing.
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Re: GPS Antenna Base Plate grounded to Chassis or Not?

Postby DynoDom on Fri Nov 24, 2023 7:05 am

Hello Nathan

Thank you for the reply.

Do you mean, it does not require a baseplate at all or it needs a baseplate of 150x150mm but this plate does not need to be earthed to chassis?

Best regards
Dom
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Re: GPS Antenna Base Plate grounded to Chassis or Not?

Postby NathanB on Fri Nov 24, 2023 8:50 am

Hi Dom,

The purpose of the 150x150 metal plate is to improve the function of the GPS unit as you are less likely to get reflections of the gps signal off the roof, not to provide grounding.
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Re: GPS Antenna Base Plate grounded to Chassis or Not?

Postby DynoDom on Mon Nov 27, 2023 3:04 am

Hello Nathan

Does the GPS antenna require a base plate on a composite roof (Yes or No)?

D
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Re: GPS Antenna Base Plate grounded to Chassis or Not?

Postby David Ferguson on Mon Nov 27, 2023 5:53 am

We use the GPS-L10 on composite bodied cars (without any additional ground plane) without issue. Just make sure it's on top of the carbon fiber not underneath it.
David Ferguson
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Re: GPS Antenna Base Plate grounded to Chassis or Not?

Postby NathanB on Mon Nov 27, 2023 8:56 am

Hi DOm,

As David has covered, it is not required for the GPS to function, however in some applications a base plate may be require due to signal reflection.
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Re: GPS Antenna Base Plate grounded to Chassis or Not?

Postby DynoDom on Mon Nov 27, 2023 5:31 pm

Thank you all. I understand now.

Regards
D
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