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What R my antenna options?

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  • What R my antenna options?

    Hi,

    I am trying to figure out how to improve my WIFI connection in my car. Right now I have an antenna sitting on my rear deck, which is hit or miss. From reading a lot of the threads, outside the car is option one - front dash number two - and where I have mine option 3. Additionally, my car windows are tinted. From some research, window tint (which contains metal) further reduces the effectiveness of the antenna.

    So all this said... I am trying to figure some things out

    1. What is the best antenna to use?
    2. Where should it be located?
    3. Both above give, while still keeping the ride looking nice.

    This antenna looks nice (and it does both GPS and WIFI)
    http://store.mp3car.com/Roof_top_GPS..._p/com-008.htm
    But it's got no gain -- would it work better (due to position outside car) than a 7db gain antenna inside?

    So... Any takers?

  • #2
    The best options Iīve been able to find so far are from here. Thinkinī this one will fit nicely where my existing OEM satellite antenna is mounted and give me 3db gain (before the long cable run of course).
    2008 Ford Mustang GT/CS CARPC(99%)
    Software: Ride/Road-Runner, Digital FX skin 5.x, iGuidance 2011, GPSgate on Win7 64bit

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    • #3
      Originally posted by Wayne613 View Post
      The best options Iīve been able to find so far are from here. Thinkinī this one will fit nicely where my existing OEM satellite antenna is mounted and give me 3db gain (before the long cable run of course).
      Looks promising... I didn't see price anywhere, did you catch it?

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      • #4
        Here's one purchase option
        2005 Infiniti G35 6MT Coupe Black/Black
        Core Duo CarPC
        CarDomain page

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        • #5
          here's what i am doing for a similar situation(been working great for the last year!):
          http://www.mp3car.com/vbulletin/wire...nna-array.html
          My OLD 2001 Mitsubishi Eclipse GT:
          "The Project That Never Ended, until it did"


          next project? subaru brz
          carpc undecided

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          • #6
            if all windows are tinted its not going to be better... also the antenna is a roof mount so it has to have contact with the metal to work.... the roof works as ground plane.... and without that it will not have any good output
            Blessed are the "cracked" for it is they who let in the light.

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            • #7
              Boelle,

              Thanks for the info... I follow the part about the root mounting, but I'm not sure about the 1st part. I think you are saying that the mp3car antenna (outside) will not be better than a 7db antenna inside. How about a 3db antenna outside compared to an 7db antenna inside?

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              • #8
                take it like the the ant signal to a tv... it has the shield and core, both have to be intact to work....

                the ant for a car has to be connected to the "core part" and shield too... and most antennas uses the nut to connect to chasis/metal.... this is like the shield on the tv at home... so if you take a roof mount ant and dont mount it the in the roof the shield is cut and the ant will not work like it should

                if you dont want to drill a hole in the roof you have to take a lengt of wire and crimp on a ring terminal at both ends so the nut is grounded
                Blessed are the "cracked" for it is they who let in the light.

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                • #9
                  boelle,

                  I think we aren't communicating...

                  I have am using an antenna like this:

                  http://www.amazon.com/D-Link-ANT24-0.../dp/B00403NC6C

                  which is on my rear deck (next to window) which is tinted. I am trying to compare the performance I get with it to what I could expect by having an antenna mounted on the outside -- like the mp3car one. The mp3car one is of interest because it claims 0 db gain... So would it do better than the one that claims 7 dbi given it's outside the car?

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                  • #10
                    now i got it.....

                    i think the main problem with the one you have is not the gain... i think the problem is the window tint.

                    are the front window one of those that has a heat protecting layer.. ie does is have a read tint to it when viewed from outside ? if that is the case in fact you have a total radio shielded car... more or less... just for the sake of the experiment have you tried to put the wifi on the dash? if that works better you could try to rebuild the antenna and hide it beind the a pillar trim... that is the way i did it but in my peugeot 207 none of the windows is tinted.

                    if putting the wifi on the dash does not improve it i would say you are better off with a 0 db gain outside the car..
                    Blessed are the "cracked" for it is they who let in the light.

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                    • #11
                      Originally posted by nasa View Post
                      which is on my rear deck (next to window) which is tinted. I am trying to compare the performance I get with it to what I could expect by having an antenna mounted on the outside -- like the mp3car one. The mp3car one is of interest because it claims 0 db gain... So would it do better than the one that claims 7 dbi given it's outside the car?
                      Realistically, without actually doing it your only going to get a good guess regardless.

                      The one you link to has a magnetic base, as I have a spare one of those. If you were to get the magnetic base to make direct metal contact with the car youīd get the benefit of the carīs exterior as a ground-plane in addition to itīs rated/actual gain.

                      Currently, Iīm sporting one of these bad boys. Itīs kickinī the crap out of the little stock POS I rigged to be external to test from the back of the carpc. The linked one is hooked up to a router I put in the trunk. It gets good signals even though I have it mag mounted upside-down inside the trunk. Since itīs awesome, but an eyesore, especially on my muscle-car. This effectively cuts much of the signal it can receive and transmit, add to that since itīs in the confined area much of itīs transmitting signal is reflected back. As such, the 3db one I was looking at Iīll go with eventually. As Iīm near 100% positive itīll do better than the near 8db one I have now with it being crippled.

                      Itīs still a crap-shoot, but my opinion of what I know so far of your setup is unless you have a decent mount-point for that thing, youīll probably do better with a weaker gained antenna thatīs more properly placed and/or mounted.

                      Usually the weakest link tends to be the cable used, either improperly matched or lossy. Just use this as a guideline.
                      2008 Ford Mustang GT/CS CARPC(99%)
                      Software: Ride/Road-Runner, Digital FX skin 5.x, iGuidance 2011, GPSgate on Win7 64bit

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                      • #12
                        Well,

                        I was looking at the one Wayne mentioned a little earlier -- it's specs say it has about 3 dbi gain. It is powered, which is one of the rubs... Its power requirements are 3 - 5.5V (which seems odd for a vehicle antenna). It does WIFI && GPS as well. Cost for it is about $115.

                        BTW: thanks for all the good info -- it does help.

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                        • #13
                          Originally posted by nasa View Post
                          Well,

                          I was looking at the one Wayne mentioned a little earlier -- it's specs say it has about 3 dbi gain. It is powered, which is one of the rubs... Its power requirements are 3 - 5.5V (which seems odd for a vehicle antenna). It does WIFI && GPS as well.
                          It has no active amplifier that I can tell. The selling page is just misprinted I believe, as I see nothing for that in the manual for it.

                          This one however does require power for an active amplifier built-into it.

                          Not that big a deal for me to run 5v to it from the opus, might do that instead as itīs near 4db for the wifi range, and itīs got PCS and GPS in addition. hmmm...
                          2008 Ford Mustang GT/CS CARPC(99%)
                          Software: Ride/Road-Runner, Digital FX skin 5.x, iGuidance 2011, GPSgate on Win7 64bit

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