[opendtv] Re: New iPhone antenna has same 'death grip'
- From: Mark Aitken <maitken@xxxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Tue, 8 Feb 2011 21:04:01 -0500 (EST)
For reference...
http://en.wikipedia.org/wiki/List_of_United_States_wireless_communications_service_providers
Regards,
Mark
----- Original Message -----
From: "Albert E Manfredi" <albert.e.manfredi@xxxxxxxxxx>
To: opendtv@xxxxxxxxxxxxx
Sent: Tuesday, February 8, 2011 8:44:38 PM
Subject: [opendtv] New iPhone antenna has same 'death grip'
The problem with this article is that it assumes that the AT&T network doesn't
use CDMA, while the Verizon network does. To repeat the old news flash, all 3G
networks use W-CDMA.
Possibly, the frequencies of the W-CDMA bands used by Verizon are different
enough from the AT&T ones that antenna size and design may be dramatically
different. And the Verizon scheme can aggregate smaller RF slices than AT&T
can, to create the 3G RF channel widths. Maybe that makes a difference.
Bert
----------------------------------------------
http://www.eetimes.com/electronics-news/4212957/New-iPhone-antenna-has-same--death-grip-
New iPhone antenna has same 'death grip'
Dylan McGrath
2/8/2011 1:03 PM EST
SAN FRANCISCO-Seven months after Apple Inc. got an embarrassing black eye over
the iPhone "anntenagate" scandal, Apple is back with a redesigned antenna for
the CDMA version of the iPhone 4 now available on the Verizon network in the
U.S.
But according to analysts at UBM TechInsights, the redesigned antenna on the
new iPhone 4 is not dramatically different than the antenna that caused Apple
headaches when the original iPhone 4 initially rolled out on the AT&T network.
The antenna may not necessarily have been redesigned to address the "death
grip" problem that causes the iPhone to drop calls, but to provide the best
reception possible on the CDMA band, according to UBM TechInsights. The "death
grip" location of the new antenna remains in the same spot, at the point of the
U-shaped main cellular antenna, according to UBM TechInsights.
Verizon is set to begin selling the iPhone 4 on its website Wednesday (Feb. 9),
starting at $199 for a 16GB version. The device is set to hit stores Thursday.
Thus far, no reports have suggested that the Verizon version is plagued by the
same issue as the iPhone 4 that began shipping for AT&T's network in July.
Apple may have inherently corrected the problems associated with the "death
grip" by redesigning the iPhone for CDMA applications by utilizing a Diversity
Rx antenna, UBM TechInsights said. The concept of Diversity Receiving allows
mobile networks like Verizon to provide the best possible data transmission
rates in all operating conditions, even if that includes gripping the phone as
hard as you can, the firm said.
Diversity is essentially chosen to increase reliability and it's one of the
benefits of CDMA, UBM TechInsights said. Diversity Rx can also typically reduce
the amount of circuitry needed because of the commonality of the signal paths
that the various reception antennae use, according to the firm.
A teardown analysis of the CDMA iPhone 4 found that the device uses a multimode
Qualcomm processor, opening the door to a future global iPhone.
UBM TechInsights is a division of United Business Media, the parent company of
EE Times.
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Regards,
Mark
----- Original Message -----
From: "Albert E Manfredi" <albert.e.manfredi@xxxxxxxxxx>
To: opendtv@xxxxxxxxxxxxx
Sent: Tuesday, February 8, 2011 8:44:38 PM
Subject: [opendtv] New iPhone antenna has same 'death grip'
The problem with this article is that it assumes that the AT&T network doesn't
use CDMA, while the Verizon network does. To repeat the old news flash, all 3G
networks use W-CDMA.
Possibly, the frequencies of the W-CDMA bands used by Verizon are different
enough from the AT&T ones that antenna size and design may be dramatically
different. And the Verizon scheme can aggregate smaller RF slices than AT&T
can, to create the 3G RF channel widths. Maybe that makes a difference.
Bert
----------------------------------------------
http://www.eetimes.com/electronics-news/4212957/New-iPhone-antenna-has-same--death-grip-
New iPhone antenna has same 'death grip'
Dylan McGrath
2/8/2011 1:03 PM EST
SAN FRANCISCO-Seven months after Apple Inc. got an embarrassing black eye over
the iPhone "anntenagate" scandal, Apple is back with a redesigned antenna for
the CDMA version of the iPhone 4 now available on the Verizon network in the
U.S.
But according to analysts at UBM TechInsights, the redesigned antenna on the
new iPhone 4 is not dramatically different than the antenna that caused Apple
headaches when the original iPhone 4 initially rolled out on the AT&T network.
The antenna may not necessarily have been redesigned to address the "death
grip" problem that causes the iPhone to drop calls, but to provide the best
reception possible on the CDMA band, according to UBM TechInsights. The "death
grip" location of the new antenna remains in the same spot, at the point of the
U-shaped main cellular antenna, according to UBM TechInsights.
Verizon is set to begin selling the iPhone 4 on its website Wednesday (Feb. 9),
starting at $199 for a 16GB version. The device is set to hit stores Thursday.
Thus far, no reports have suggested that the Verizon version is plagued by the
same issue as the iPhone 4 that began shipping for AT&T's network in July.
Apple may have inherently corrected the problems associated with the "death
grip" by redesigning the iPhone for CDMA applications by utilizing a Diversity
Rx antenna, UBM TechInsights said. The concept of Diversity Receiving allows
mobile networks like Verizon to provide the best possible data transmission
rates in all operating conditions, even if that includes gripping the phone as
hard as you can, the firm said.
Diversity is essentially chosen to increase reliability and it's one of the
benefits of CDMA, UBM TechInsights said. Diversity Rx can also typically reduce
the amount of circuitry needed because of the commonality of the signal paths
that the various reception antennae use, according to the firm.
A teardown analysis of the CDMA iPhone 4 found that the device uses a multimode
Qualcomm processor, opening the door to a future global iPhone.
UBM TechInsights is a division of United Business Media, the parent company of
EE Times.
----------------------------------------------------------------------
You can UNSUBSCRIBE from the OpenDTV list in two ways:
- Using the UNSUBSCRIBE command in your user configuration settings at
FreeLists.org
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