Antenna Archive

  • iPhone 4 antenna woes contextualized by dude in the know

    iPhone 4 antenna woes contextualized by dude in the know

    Posted on June 25, 2010 | No Comments
    It's the ultimate of ironies that Apple's externalized antenna array in the iPhone 4 -- hoped (and hyped up) to finally give us a phone every bit as good the rest of the device -- has become the cause of most rancor in the immediate aftermath of the handset's release. This morning you'll be rubbing both sleep and disbelief out of your eyes as you read that Apple's response to some people's reception problems with the 4 is to hold it differently. But, before we start ostracizing Apple as the singular offender here, let's hear from a man in the know.

    Spencer Webb runs AntennaSys, a company that designs tailormade RF solutions, and has himself worked on making quad-band transceivers for AT&T. As he tells it, almost all phone makers have now transitioned to locating their antennae at the bottom of the phones. This has been in order to move radio wave emissions away from the head (a shortcoming that a top-mounted aerial would incur), which the FCC has been quite demanding about with its SAR standards --
    The iPhone 4, however, moved the antenna action from the back of the phone to the sides. This probably improves the isotropy of the radiation pattern, but only when the phone is suspended magically in air.
    Another great point made here is that testing done both by the Federales and mobile carriers might include the head, but never accounts for the presence of the person's hand. Thus, although a phone's antenna could test very well, it might suffer from such issues as those experienced with the iPhone 4. Mind you, this still seems like an assembly (rather than design) problem to us, since most of our editors haven't had any reception worries and we in fact saw improved performance on that front while conducting our review testing. Spencer himself has decided to buy the phone knowing full well about this potential limitation, and concludes on the note that "sometimes an antenna that's not great, but good enough, is good enough."

    iPhone 4 antenna woes contextualized by dude in the know originally appeared on Engadget on Fri, 25 Jun 2010 03:47:00 EST. Please see our terms for use of feeds.

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  • Some iPhone 4 models dropping calls when held left-handed, including ours (Update: Apple responds)

    Some iPhone 4 models dropping calls when held left-handed, including ours (Update: Apple responds)

    Posted on June 24, 2010 | No Comments
    digg_url = 'http://digg.com/apple/iPhone_4_bezel_antenna_actually_makes_it_DROP_calls'; What's more annoying than spending hours lining up for a shiny new gadget? Learning that your precious phone can't actually connect to the network. Well, depending on how you hold it -- word has it that the iPhone 4's bottom-left corner isn't playing nice with your skin. If you recall from the keynote, that's where the Bluetooth / WiFi / GPS antenna meets its GSM / UMTS counterpart. So we decided to test on two brand new iPhone 4 handsets purchased today in the UK.

    One iPhone 4 demonstrated the issue everytime it was held in our left hand (as a right-handed person is apt to do) so that our palm was essentially bridging the two antennas. You can see that in the video after the break. Bridging the two with a finger tip, however, didn't cause any issues with the reported reception. If we had to guess, we'd say that our conductive skin was acting to detune the antenna -- in fact, we've already managed to slowly kill two calls that way so it's not just an issue with the software erroneously reporting an incorrect signal strength. That said, we had no issues when Apple's $29 rubber bumper accessory (given to us free for standing in line) was attached, creating a buffer between our palm and the antennas. Our second UK-purchased iPhone 4 was fine, showing none of these handling symptoms. See the video evidence after the break including Insanely Great Mac's version which got us to worrying in the first place.

    P.S. Don't forget to take our poll and let us know if you're seeing both the yellow spots / stripes and reception issues. Unfortunately, we're suffering from both flaws which is not a good sign for quality control on this first batch of Apple handsets.

    P.P.S. Since some of you are asking, our review unit showed none of these issues.

    Update: Apple responds to the issue, and boy, it's a doozy.

    Continue reading Some iPhone 4 models dropping calls when held left-handed, including ours (Update: Apple responds)

    Some iPhone 4 models dropping calls when held left-handed, including ours (Update: Apple responds) originally appeared on Engadget on Thu, 24 Jun 2010 07:53:00 EST. Please see our terms for use of feeds.

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  • iPhone 4’s seams explained, ready to solve AT&T call issues? (video)

    iPhone 4’s seams explained, ready to solve AT&T call issues? (video)

    Posted on June 8, 2010 | No Comments
    When we first exposed the iPhone 4 to the world, many of you were skeptical about its authenticity. Frankly, so were we, initially anyway. A device with black seams disrupting its otherwise clean lines just couldn't be from Apple, a company notorious for its obsessive design aesthetic. Well, now that the iPhone 4 is official, Steve took a moment to explain that the stainless steel band is actually an integral part of the iPhone's antenna system -- one part dedicated to Bluetooth, WiFi, and GPS; the other larger half to UMTS and GSM. Something that, according to Steve, has never been done before in a phone. We'll have to wait a bit before we know whether this "brilliant engineering" translates into fewer dropped calls for frustrated AT&T customers. But it's hard to imagine that Apple would take the time to show its antennas to developers if there wasn't a downstream reward for consumers. Remember, Steve did say last week that things "should be getting a lot better soon" on AT&T. Click through to hear Apple's loyal software developers ooh and aah over the iPhone's really cool ability to convert electromagnetic radiation into electrical current, and back. Amazing.

    Continue reading iPhone 4's seams explained, ready to solve AT&T call issues? (video)

    iPhone 4's seams explained, ready to solve AT&T call issues? (video) originally appeared on Engadget on Tue, 08 Jun 2010 08:36:00 EST. Please see our terms for use of feeds.

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