HANDHELD COMPUTING DEVICE COMPRISING AN ANTENNA WINDOW

A portable electronic device, comprising a housing formed of radio-opaque material and having a bottom wall and sidewalls, wherein a top edge of the sidewalls defines a front opening and a bottom edge of at least one sidewall defines a first portion of a radio-frequency (RF) antenna window opening, and wherein a portion of the bottom wall has an internal edge that defines a second portion of the RF antenna window opening, the RF antenna window opening being opposite to the front opening; and a RF-transparent antenna window formed of a material that allows passage of RF energy is disposed within the RF antenna window opening, the RF-transparent antenna window having a first portion having a first curvature substantially the same as a curvature of the portion of the bottom wall having the internal edge and wherein a second portion of the RF-transparent antenna window at least partially surrounds the first portion and has a second curvature that transitions from the first curvature to a curvature of the sidewall having the bottom edge.