Electronic device having a multi-state antenna ground structure

摘要

An electronic device (100) has a multi-state antenna ground structure (428, 500) integrated into the device housing. Configuration of the electronic device (100) for use in one of at least two operable configurations automatically causes a switching of the ground structure to improve antenna efficiency. Metal plates (416, 424) are secured within movable portions (104, 114) of the device housing such that in a first configuration the metal plates are in close proximity and act as a low impedance path for switching the ground structure to a first state. In a second configuration of the electronic device (100) the plates are separated an act as a high impedance path for switching the ground structure to a second state.