| 摘要 |
An antenna, or a method of controlling an antenna, comprises: an antenna element, an electrically conductive plane which is divided into a plurality of isolated parts and a switching unit controlled to connect one or more of the conductive plane parts to a ground potential of the antenna. The electrically conductive plane parts may be any conceivable shape and may be arranged in two or three dimensional designs and the said parts may overlap one another. The ground plane control system may be arranged to use at least one parameter associated with the radio propagation properties of the antenna to steer the antenna radiation beam to improve the antenna operational performance. Antenna properties such as: signal strength, signal to noise ratio or interference levels may be used by a computer to control the switching unit to derive an optimal antenna operating condition. The antenna may provide a simple, compact and cheap steerable antenna for vehicles, computers, satellites or communication equipment.
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