Abstract:
An antenna structure for the transmission and processing of electromagnetic microwave signals is manufactured by making holes in a number of electrically-conductive plates (1-7) by means of a mechanical or chemical process in order to create cutouts in the form of through holes (8-14) with electrically-conductive edge surfaces. For each plate these have a defined position and length in each plate's principal plane and also a length from one side of each plate to its other side. The plates with the holes are stacked in a defined relative position and the sides of the plates are fixed to each other at least around the edge surfaces formed. By this means a number of holes (9, 11, 13) are given electrically-conductive limit surfaces in the form of the said edge surfaces and also the parts of the side surfaces of the surrounding plates (1, 3, 5, 7) facing the holes.