| 摘要 |
An antenna comprises a conductive foil layer (16) which forms a ground plane, a conductive foil element (20) spaced from the ground plane, and a dielectric substrate (14) separating the foil element from the ground plane, the dielectric substrate being of an extruded plastics material having a cellular configuration in cross-section. More particularly, the dielectric substrate comprises one or more superimposed substrate sheets of extruded plastics material, with the or each substrate sheet comprising a pair of spaced, parallel skins (38) and webs (40) extending between and separating the skins. A method of applying the foil element to the dielectric substrate and of making the antenna and various component parts thereof are also disclosed.
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