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Ask an Expert Forum GPS antenna value not coming
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  • gps
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GPS antenna value not coming

narendra_sixsense
narendra_sixsense over 2 years ago

Hi, team, 
We recently purchased this gps antenna chip https://in.element14.com/molex/204283-0001/omni-antenna-lin-1-597-1-607ghz/dp/2855754

And : https://in.element14.com/pulse-larsen-antennas/w3011a/gps-ceramic-chip-antenna-1-57542/dp/2897228

to use this with simcom module A7672s as a passive antenna. 

we soldered this as per footprint, we tried both antenna on two separate PCBs we designed with different footprint as per datasheet , but no gps values coming, please help us, whether or how these gps worked ? 

Please send, if anyone have any tested reference schematic layout.

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  • jc2048
    jc2048 over 2 years ago in reply to ashutamar +2
    This is the Molex recommended layout. www.molex.com/.../2042830001-AS.pdf Your photograph isn't very clear, but it looks like you have ground copper under the antenna. I'm not an rf specialist…
  • jc2048
    jc2048 over 2 years ago +1
    Are you sure that the module you've got can even do this? I didn't investigate too far, but the manufacturer's site says GNSS is offered as an 'option' with these modems.
  • shabaz
    shabaz over 2 years ago

    Hi, the intricacies are what will make or break this. You'll need to provide detailed, high-res photos of your construction, and also explain the considerations you used when laying it out. This applies to both the simcom unit and the antenna.; it applies to the whole board too.

    Otherwise, it's kind of a very slim chance that someone can share their design using the same combination of parts and board; what's the chances of that?

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  • jc2048
    jc2048 over 2 years ago

    Are you sure that the module you've got can even do this? I didn't investigate too far, but the manufacturer's site says GNSS is offered as an 'option' with these modems.

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  • phoenixcomm
    phoenixcomm over 2 years ago

    hate to ask where is your GPS receiver?? Simcom unit just seems to be cellular. 

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  • narendra_sixsense
    narendra_sixsense over 2 years ago in reply to phoenixcomm

    No sir, A7672s M7 my variant support GPS & actually normal PCB antenna works fantastic only problem,  PCB antenna takes extra space & bit issue in fixing in moving vehicles / automative application due to lot vibrations possible.

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  • narendra_sixsense
    narendra_sixsense over 2 years ago in reply to jc2048

    Yes sir, A7672s M7 my variant support GPS & actually normal PCB antenna works fantastic only problem, PCB antenna takes extra space & bit issue in fixing in moving vehicles / automative application due to lot vibrations possible.

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  • narendra_sixsense
    narendra_sixsense over 2 years ago in reply to jc2048

    Yes sir, A7672s M7 my variant support GPS & actually normal PCB antenna works fantastic only problem,  PCB antenna takes extra space & bit issue in fixing in moving vehicles / automative application due to lot vibrations possible.

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  • ashutamar
    ashutamar over 2 years ago in reply to jc2048

    yes  sir, A7672s M7 my variant support GPS & actually normal PCB antenna works fantastic only problem,  PCB antenna takes extra space & bit issue in fixing in moving vehicles / automative application due to lot vibrations possible.

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  • ashutamar
    ashutamar over 2 years ago in reply to phoenixcomm

    sir, A7672s M7 my variant support inbuild GPS receiver  & actually normal PCB antenna working fine with A7672s only problem, PCB antenna takes extra space & bit issue in fixing in moving vehicles / automative application due to lot vibrations possible. so i'm trying this tiny gnss reciever

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  • ashutamar
    ashutamar over 2 years ago in reply to shabaz

    imageimageimage

    the PCB UFL antenna is working fine but this tiny antenna B1  204283-0001 . omni antenna MOLEX 

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  • cstanton
    cstanton over 2 years ago in reply to ashutamar

    Hello,

    I'm placing your accounts under moderation for posting with two different usernames with different names under each profile.

    I've reached out to you over direct message to explain.

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