| 摘要 |
This invention relates to a phase shifting device, which generally comprises of rigid chassis, in the form of an aluminium plate, which can form a ground plane for feed lines ( 12 ) printed on a printed circuit board ( 16 ), which is mounted on the chassis, a rigid RF transparent block, which is fixed to an actuator arm and mounting bolts for slidably mounting block and actuator on the chassis. A flexi circuit, or the equivalent, ( 18 ) is attached to the block and is printed with generally c-shaped conductive strips ( 23 ), which form connections at open parts of the feed lines, in such a manner that movement of the block will cause changes in the effective lengths of the feed lines ( 12 ) and hence the relative phases of antennas fed by those feed lines.
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