| 摘要 |
An antenna 1A, suitable for being carried by a person, comprises: a driven element 2 and a ground plane element 3 both mounted on a support 4 in a collapsible manner, towards the support, with a linkage between the driven element and the ground element which is arranged such that when one of the driven element or the ground element is collapsed, the other said element is also collapsed. The support 4 may be a central elongate column member with multiple elongate driven and ground members 2, 3 attached in a hinged, and possibly sliding ring, arrangement to the support 4. The driven and ground members 2, 3 may be arranged to collapse into a housing 7 such that they are adjacent and aligned with the support 4 in a compact arrangement and to extend in respective planes in a radial manner relative to the support, in a deployed condition. The driven members 2 may be crossed dipoles and there may be at least four ground members 3 forming a reflector. The antenna 1A may involve a mechanism, including conductive and insulating members, for collapsing and deploying the antenna. The antenna may further include means to bias the antenna towards its deployed condition. The antenna may be used by the military for quick and simple operation. The antenna may be mounted on a backpack, on the ground or on a vehicle. |
