What’s So Smart About the iPhone 4S’s Antenna?

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With the iPhone 4S, Apple says it will deliver an iPhone that works anywhere in the world, and with fantastic reception.   How did they do it? One word: antennas.
Apple's marketing guru Phil Schiller said the iPhone 4S "intelligently switches between two antennas to receive and send." Brilliant! But vague. How exactly does a smart antenna act?
When you have a small, thin device that needs to receive and send multiple types of signals without interfering with one another, you need to get creative. As we learned from the iPhone 4 "antennagate," even the best engineers and designers can't always come up with a perfect antenna scheme.  more...