| 摘要 |
A cavity-backed antenna 26, or an electronic device, comprises a cavity-backed resonant antenna element 70 where the cavity 72 is formed from a dielectric support structure 112 covered with a layer of conductive material 74, 76. The dielectric material may be a moulded plastic support structure 112 covered by a conductive metal such as copper or aluminium via any suitable deposition technique. The resonant antenna element 70 may take any form including one or more open and/or closed slot arrangements in a conductive plate, planar inverted-F antenna arrangements, patch antennas or various monopole and/or dipole printed antenna arrangements. The antenna may be arranged to operate in one or more different frequency bands. The cavity backed antenna 26 may be used in a housing associated with an electronic device such as a computer or a mobile phone. An antenna window may be provided in the said housing where the window may be formed by a region of dielectric material or from antenna window slots formed in a conductive member such as a conductive wall of the electronic device housing. |
