Apple Posts Smartphone Antenna Webpage

Soon after Apple’s press conference ended. Apple launched a new webpage called “Smartphone Antenna Performance“ where they further explain the iPhone 4′s “antenna performance”, comparing to other smartphones tested in the cellular market.

Below are the cellular phones tested:

• iPhone 4
• BlackBerry Bold 9700
• HTC Droid Eris
• Samsung Omnia II
• iPhone 3GS

Click here to view.

Understanding attenuation and signal loss.

The opposite of amplification, attenuation happens whenever a signal is obstructed. All antennas — including television, radio, GPS, and cellular antennas — can experience attenuation. And with most antennas, the density and composition of the human hand can cause attenuation to a greater degree than some other materials. On a mobile phone, signal loss typically occurs when your hand attenuates the most sensitive part of the antenna. In the photos and videos below, we demonstrate how different grips cause attenuation on many popular smartphones — including iPhone 4 and iPhone 3GS.¹