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Отредактированно Andrew Optimus Goldheart -

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[* black] There areWe found three antennas in the Sonos Play:3Play:3, all attached to a communications card on the motherboard and held in place with a soft glue.
[* black] We speculate that twoThrough a combination of these antennas (the green ones) are responsible for aiding in the transmission of SonosNetthree antennas, the secure, AES-encrypted, peer-to-peerPlay:3 communicates over [https://sonos.custhelp.com/app/answers/detail/a_id/126/~/information-about-sonosnet|SonosNet], a proprietary wireless mesh network createdthat connects the player to connecta Sonos devicesBridge or another player (but not your home wireless network).
[* black] The length of the antenna traces are listed on the antenna boardboard (10 and 23.2 mm). The antenna design seems to be that of an [link|http://www.antenna-theory.com/antennas/aperture/ifa.php|Inverted F-Antenna]. IFAs areF-Antenna], common in small electronics and are implemented as a method to reduce antenna size and improve multiplemultiple input multiple output ([link|http://en.wikipedia.org/wiki/MIMO#Functions_of_MIMO|MIMO]) systems.
[* black] There areWe found three antennas in the Sonos Play:3Play:3, all attached to a communications card on the motherboard and held in place with a soft glue.
[* black] We speculate that twoThrough a combination of these antennas (the green ones) are responsible for aiding in the transmission of SonosNetthree antennas, the secure, AES-encrypted, peer-to-peerPlay:3 communicates over [https://sonos.custhelp.com/app/answers/detail/a_id/126/~/information-about-sonosnet|SonosNet], a proprietary wireless mesh network createdthat connects the player to connecta Sonos devicesBridge or another player (but not your home wireless network).
[* black] The length of the antenna traces are listed on the antenna boardboard (10 and 23.2 mm). The antenna design seems to be that of an [link|http://www.antenna-theory.com/antennas/aperture/ifa.php|Inverted F-Antenna]. IFAs areF-Antenna], common in small electronics and are implemented as a method to reduce antenna size and improve multiplemultiple input multiple output ([link|http://en.wikipedia.org/wiki/MIMO#Functions_of_MIMO|MIMO]) systems.