MOBILE COMMUNICATION DEVICE

摘要

Embodiments described herein relate a mobile communication device and techniques to suppress deterioration of antenna characteristics. The mobile device includes metallic members that are disposed around, or in portions of a casing of the mobile device. The metallic member is grounded directly to a ground plane of the mobile device at a first predetermined position. The grounded metallic member forms a stub line that cancels a flow of electric current though the metallic member. Furthermore, the metallic member is also connected to the ground plane, at a second predetermined location, via a resonant circuit. The mobile device is capable of adjusting a phase of the antenna current flowing through the device, when the mobile device is being operated by a user, and thus suppresses deterioration of antenna characteristics in certain desired frequency bands.

主权项

1. A communication device comprising:
a casing; at least one metallic member disposed around the casing; and a ground plane directly connected by a connecting member to a first connection point on the at least one metallic member to define an open end of the at least one metallic member and a transmission path between the first connection point and the open end such that the transmission path has a resonant frequency within a first frequency band, in which performance deterioration of an antenna of the communication device is larger than the performance deterioration of the antenna outside of the first frequency band when the communication device is being held by a user.