| 摘要 |
The antenna has a multilayer structure with several radiating patches (11) on a layer of dielectric material. A corresponding number of apertures (31), in the form of orthogonal slots are in a ground layer (3), and feed elements, (21a, 22a, etc) are in a feed network (22) on a planar board (2). These feed microwave energy from the elements via the slots to the patches, to cause them to form a dual polarised microwave beam propagating from a front side of the antenna. The rear side of the antenna has a metal reflector. The metal reflector has a flat hollow metal structure (3) with electrically separated boxlike compartments in registry with the patches, the slots and the feed elements. Each compartment is confined between the ground layer and a top wall part, with a bottom wall part and side wall parts extending between the top and bottom wall parts. Any microwave propagation in the hollow metal structure is interrupted and any mutual coupling between the slots is avoided. |
