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Support Antenna (includes GPS), reception discussion

Discussion in 'Android Devices' started by EarlyMon, Feb 19, 2013.

  1. EarlyMon

    EarlyMon The PearlyMon
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  2. Hadron

    Hadron Well-Known Member
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    Been wondering about the details of this myself. And those other antennae (WiFi/BT/GPS).

    For once I'm going to keep my eye out for the FCC report :)
     
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  3. EarlyMon

    EarlyMon The PearlyMon
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    Had my curiosity piqued by the nice video - and didn't believe some of the claims there, guess what -

    AnandTech - Hands on and Impressions from the HTC One - Formerly M7

     
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  4. KOLIO

    KOLIO Guest

    WPC?:thinking:

    That's a new one for me(I think).......
     
  5. LoyalServant

    LoyalServant Well-Known Member
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    I can't see how this antenna design is really much different than the iPhone antenna blunders.

    I worked with RF for a really long time... and still do here and there in my hobby projects... seen a lot of attempts at this and none work well.
    If you come into close proximity of the antenna you will detune it and cause attenuation - but I think we all get that.

    Call me a party pooper but I think this has fail written all over it.
    This is the issue with phones now.. they typically put the antennas for the cell radio(s) on the bottom and gps/wifi and friends at the top.

    I like the phone a lot.. but I can't help but think this is iPhone all over again where it's about the form not the function.
     
  6. EarlyMon

    EarlyMon The PearlyMon
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    The iP4 didn't coat the antennas, so touching them could short them, that was pretty serious.

    First thing I did when I read the AnandTech statement was review how I held my phone - I manage to grab from top to bottom, so not sure here.

    I've done RF on the job as well - exactly why I raised the questions here.

    I don't know what to make of the active tuning thing.

    Almost anything in proximity to an antenna changes it. That said, my other phones have been fine being held, the overall design ought to allow for that.

    The first field reviews should prove quite interesting.

    I'd like to say that no one can be that stupid in design but then again - iPhone 4.
     
  7. Hadron

    Hadron Well-Known Member
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    But can anybody be that stupid again after the iPhone 4?
     
  8. OverByter

    OverByter Resident Slide Rule Guru
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    It probably uses an active tuner like we use with our ham rigs, uses a r/c network to keep the swr optimal no matter how you hold it so that there's no unwanted attenuation involved. I definitely agree with Hadron, can't wait to see the FCC filing on this bad boy. :p
    OB
     
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  9. EarlyMon

    EarlyMon The PearlyMon
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    Only problem with FCC filings is that they show transmission power but don't fully characterize sensitivity, yeah? Or I am mis-remembering that?

    Mine would end up in a case anyway, but I still wonder if there's an insulating poly coating on that aluminum or not.
     
  10. LoyalServant

    LoyalServant Well-Known Member
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    I can see that being possible.. it would have to learn.
    Modern tuners do store what they have learned and try those first to speed up matching.

    At the power levels we are talking about here you can effectively load up the track on the circuit board and radiate virtually no power while keeping the transmitter happy.

    In the end the handset may be able to hear the BTS but what if the BTS can't hear the handset?

    The FCC filings will be interesting, but I want to see the iFixit teardown more than the FCC filing myself.
    If it works I want to see how it works :)
     
  11. toad6386

    toad6386 Well-Known Member
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    For sure, RF does funny things when in close proximity with anything, but I'm with Early on this one: My (un)coordination makes it almost mandatory I have a decent case (TPU at least). Folks had problems with the Palm Pre's "oreo-ing" - I dropped mine so much, I had double-stuff! :eek:
     
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  12. EarlyMon

    EarlyMon The PearlyMon
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  13. KOLIO

    KOLIO Guest

    R. I. P. SVDO, it was nice to know ya.... :(
     
  14. EarlyMon

    EarlyMon The PearlyMon
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  15. KOLIO

    KOLIO Guest

    Definitely a bummer, but, hopefully most will see 4G LTE some time this year & this will be a non-issue in most scenarios when out of WI-FI coverage.
     
  16. EarlyMon

    EarlyMon The PearlyMon
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    With all of the advantages of the world modem built-in to the S4, I'm surprised that the Snapdragon 600 doesn't have it and may require a separate modem chip like the S4 Pro. I'd like to see that part confirmed.

    Interesting about the dual antennas and the way they're expected to work.
     
  17. sean76

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    I was watching a Vid a few days ago that was talking about the design and if it will affect the antena...A La,,,antena gate?

    And from what they were saying those lines in the rear part of the device, specifically the colored ones (white on the Silver aluminum One) are to help with the antena.

    In light of what one poster said...I cant imagine a company not learning from the past and making a mistake as big as Apple did a few years ago.
     
  18. BKayrac

    BKayrac Well-Known Member
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    So my signal reception on my galaxy nexus, is well, awful. And on my girlfriends galaxy s3 it's pretty 'meh' itself.

    For those that have this guy in hand, have you guys payed attention to how the signal reception is?
     
  19. sean76

    sean76 Well-Known Member
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    Looks like your talking about the U.S. Varient because the Euro GNex didn't have recep issues like the U.S. VZW model did. Either way, nobody has handled the LTE Variant yet so we'll have to wait and see if that's the version your looking to find out about. Alot of us are interested in the same question as this will also impact battery life on the LTE model.
     
  20. patpending

    patpending Well-Known Member
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    I've used the SIII LTE version on and off (working with a Telco in Aus). As far as handsets go, we've found that the Galaxy series antenna's are not as strong or reliable as other manufacturers - ie HTC, Sony, BlackBerry etc.

    I have no trouble believing you've been having issues with both SIII and Nexus.
     
  21. LoyalServant

    LoyalServant Well-Known Member
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  22. WasimYaqoob

    WasimYaqoob New Member
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    I'm lucky enough to have received my pre-order on time and have absolutely no issues with signal here in the UK.
     
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  23. EarlyMon

    EarlyMon The PearlyMon
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    NFC antenna isn't show on the FCC diagram, so not sure from the pictures there.
     
  24. EarlyMon

    EarlyMon The PearlyMon
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