iPad's got 2 WiFi antennas and iPad 3G is larger

Discussion in 'iPad' started by ThatsMeRight, Mar 13, 2010.

  1. ThatsMeRight macrumors 68020

    Sep 12, 2009
    Both iPad models (WiFi only and WiFi + 3G) have two WiFi antennas! Thanks to our friends over at the FCC we now know the iPad has got two WiFi antennas.

    It's not like the iPad will use both antennas at the same time: the iPad will just choose the one with the best reception. Another nice thing about this is that if one fails, you will still have a WiFi connection.

    Also, the iPad 3G is 0,3 milimetre higher and 0,1 milimetre wider than the WiFi-only model. The extra space is assumably needed because of the GPS chip and the 3G chip. The digital compass is included in both the WiFi-only and WiFi+3G models. It can also just be the plastic sticking out.
  2. aaquib macrumors 65816


    Sep 11, 2007
    Toronto, Canada
    Does this mean that browsing on the iPad will be more like my Mac and less like my iPhone (in terms of speed)?
  3. ThatsMeRight thread starter macrumors 68020

    Sep 12, 2009
    Well. The iPad will check how the reception is, and it chooses the best chip with the best reception. This means you will have a better, steady connection. These WiFi chips also supports 802.11n which is kinda the fastest WiFi speed (your router should also support 802.11n). And yes, it's definetly faster than your iPhone (since the iPhone doesn't support 802.11n).
  4. skunk macrumors G4


    Jun 29, 2002
    Republic of Ukistan
    Hard to believe. Do you know how small 0.1mm is? It's probably nothing more than the plastic top moulding being infinitessimally larger than the alumin(i)um version.
  5. ThatsMeRight thread starter macrumors 68020

    Sep 12, 2009
    It's just what the FCC reports say.
  6. skunk macrumors G4


    Jun 29, 2002
    Republic of Ukistan
    Maybe (I have not read it) but it makes no sense. The plastic would have to be fractionally thicker than the aluminium, for strength alone, so any potential microscopic gain would be lost anyway.
  7. bossxii macrumors 68000

    Nov 9, 2008
    Kansas City
    It has two antenna because it is in fact "N" wifi, which uses more than one at a time.

    See this article for comparison of N to A, B and G.


    The newest IEEE standard in the Wi-Fi category is 802.11n. It was designed to improve on 802.11g in the amount of bandwidth supported by utilizing multiple wireless signals and antennas (called MIMO technology) instead of one."
  8. mrklaw macrumors 68020

    Jan 29, 2008
    does it support 5GHz 'n'? I have my TC set to 5GHz n for my MBP, and my ADSL modem is set to 2.4GHz 'g' for other devices.

    if iPad doesn't support 5GHz I'd have to drop down to 'g'.
  9. bidwalj macrumors 65816

    Feb 16, 2007
    hopefully this means the ipad wifi will stay connected during sleep. on both my iphone and ipod touch, wifi disconnects when the screen is on standby. on the iphone, data still filters through since its connected to 3g, but the ipod touch does not get any new data until the screen is turned on.

    this effects chat apps on the touch greatly since no im's come through until you turn the screen back on and it connects to the wifi network.
  10. BruiserBear macrumors 6502a

    Jul 24, 2008
    The iPod will fetch your email based on the intervals you set.
  11. jedivulcan macrumors 6502

    May 15, 2007
    I think some apps, like the iTunes remote application, will let the wifi connection stay connected as long as the iPod/iPhone is in range and you're connected.

    It'd be interesting to see how the 3g radio responds to power-saving when the device's screen is off.
  12. goobot macrumors 603


    Jun 26, 2009
    long island NY
    im pretty sure its just the black radio sticking out a little.
  13. MythicFrost macrumors 68040


    Mar 11, 2009
    IIRC the 5GHz mode is 802.11n, so yes it should.
  14. esserdk macrumors member

    Mar 15, 2009
    5GHz connection is an entirely diffrent standard from 802.11n.
    It is called 802.11a. I still would have to assume that this standard is supported though. Anything else would be plain stupid.
  15. brentsg macrumors 68040

    Oct 15, 2008
    I would suggest that you brush up on your 802.11n specs.
  16. gr8tfly macrumors 603


    Oct 29, 2006
    ~119W 34N
    Both 802.11a and 802.11n can use the 5GHz band (and the iPad supports it, based on the FCC test docs).
  17. MrAgileBeast macrumors regular

    Mar 2, 2010
    im lost :|


    can someone dumb it down just for me :)
    im very interested in maximizing my iPad Speed
  18. gibbz macrumors 68030

    May 31, 2007
    Here is a good description.
  19. melman101 macrumors 68030

    Sep 3, 2009
    The 5GHz band is the reason why I bought a simultaneous dual-band Airport Extreme from Apple. I knew that my Macs could support 802.11n 5GHz so since the 2.4ghz in my building is clogged with wifi networks, I decided to go this route. And boy, it's a dream. I can't wait to connect my iPad to this network.

    Alas, I'll be waiting for the 3G iPad anyhow though.
  20. barefeats macrumors 65816


    Jul 6, 2000
    4G for iPad

    My plan is to use the Sprint 4G Overdrive palm sized WiFi router with the WiFi only iPad. When I tested it with the MacBook Pro, the download speed was 3 times faster than 3G. Ditto for the Google Nexus One and Verizon Droid phones. However, for some reason, the iPhone 3GS downloads were slower than 3G when used with the Overdrive.

    So my hope is that the iPad performs like the MacBook Pro rather than the iPhone when used with the Overdrive.

    Assuming it works well, since we are a two iPad family, the per unit cost per month for the unlimited 4G connection will be the same as the AT&T 3G. The only downside will be the requirement for a contract.

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