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Hi, can someone indicate me the number of wifi antennas embedded in Wi‑Fi + Cellular iPad with Retina Display (4th Gen) ? And also specify the power gain of each antenna, and the combinations of all antennas ? Thanks.I have searched this forum without success (as well as Apple.com web site).
PimsV
http://compnetworking.about.com/od/homenetworkhardware/a/introduction-to-wifi-wi reless-antennas.htm
iPad, iOS 6.1.2, 4th Gen + Cell
All iPads, to the best of my knowledge, have a single WiFi antenna. Apple has not detailed the power gain of any of the antennas in any place I can find.
Regards.
Thanks Varjak Paw. I will ask Apple directly and post back afterwards.
I'm guessing there may be two wifi antennas - one for 2.4GHz and one for 5GHz.
Cheers, Tom 😉
Teardowns of the iPad show only one, though there could be two antennas cemented together.
Regards.
This is the only iPad wifi antenna related info that I could find.
http://revolutionwifi.blogspot.com/2012/03/ipad-3-wi-fi-specifications.html
http://www.ifixit.com/Teardown/iPad+Wi-Fi+Teardown/2183/3
I doubt that Apple will provide the info you want. They'll consider it Proprietary.
However, suggest you contact the ifixit site (link above). Since they do teardowns, they can probably tell you.
Cheers, Tom 😉
Thanks Tom, this was really helpful. PimsV
Thanks to one of Apple France Enterprise - Pre-Sales Engineer, here are the answers to my Wi-Fi questions on iPad 4: (use http://www.apple.com/ipad/business/it-center/)
http://images.apple.com/ipad/business/docs/iOS_6_Wifi_Sep12.pdf
For Gain, consult the FCC web site: http://www.fcc.gov/ ID BCGA1458 and BCGA1459 and FCC ID BCGA1460
iPad 4 (4th Generation) FCC ID BCGA1458 and BCGA1459 and FCC ID BCGA1460
802.11 a/b/g/n 2.4GHz and 5 GHz bands
40 MHz bonded channels support on 5 GHz Band
Short guard interval support
1x1:1 MIMO
MCS Index 7 (150 Mbps)
Antenna Gain:
Details of the ISM Band
Average Power (802.11g)
2412 MHz: 15.97 dBm
2437 MHz: 16.45 dBm
2462 MHz: 15.46 dBm
Average Power (802.11n)
2412 MHz: 15.48 dBm
2437 MHz: 16.45 dBm
2462 MHz: 14.95 dBm
Average Power(802.11a)
5745 MHz = 18.43 dBm
5785 MHz = 18.43 dBm
5825 MHz = 18.47 dBm
Average Power (802.11n 5 GHz)
5745 MHz = 18.46 dBm
5785 MHz = 18.45 dBm
5825 MHz = 18.48 dBm
Average Power (802.11n 5GHz Wide Channels)
5755 MHz = 18.43 dBm
5795 MHz = 18.45 dBm
Details of the U-NII Bands
5.2 GHz (U-NII Low or U-NII-1)
Output Power (802.11a)
5180 MHz = 13.98 dBm
5200 MHz = 13.98 dBm
5240 MHz = 13.98 dBm
Output Power (802.11n)
5180 MHz = 13.99 dBm
5200 MHz = 14.00 dBm
5240 MHz = 13.99 dBm
Average Power (802.11n Wide Channels)
5190 MHz = 12.00 dBm
5230 MHz = 15.50 dBm
5.3 GHz (U-NII Mid or U-NII-2)
Output Power (802.11a)
5260 MHz = 17.50 dBm
5300 MHz = 17.50 dBm
5320 MHz = 16.00 dBm
Output Power (802.11n)
5260 MHz = 17.50 dBm
5300 MHz = 17.50 dBm
5320 MHz = 16.00 dBm
Average Power (802.11n Wide Channels)
5270 MHz = 17.50 dBm
5310 MHz = 14.00 dBm
5.6 GHz (U-NII Mid Worldwide or U-NII-2E)
Output Power (802.11a)
5500 MHz = 15.49 dBm
5580 MHz = 17.98 dBm
5700 MHz = 15.00 dBm
Output Power (802.11n)
5500 MHz = 14.92 dBm
5580 MHz = 18.00 dBm
5700 MHz = 15.00 dBm
Average Power (802.11n Wide Channels)
5510MHz = 13.00 dBm
5550 MHz = 18.00 dBm
5670 MHz = 16.00 dBm
Number of antenna in iPad 4th Generation
