Procedure to define the structure of a Ka-band antenna

摘要

Procedure for determining the geometry of a flat multi-focus network antenna for the Ka band comprising at least two antenna elements, each antenna element comprising a reflector and a sub-reflector, at least one source supplying said antenna elements , the procedure being characterized in that it includes at least the following steps: - define a threshold value Gumbral of gain of the antenna, - represent the surface of the sub-reflector and the surface of the reflector by means of a set of points (XS, ZS) for the sub-reflector y (XSR, ZSR) for the reflector, - generate from a matched electromagnetic simulation module a set of pairs of values {(θ1, G1) ... (θn, Gn)} corresponding to the direction radiation and the antenna gain, for each antenna element and for each set of points chosen to represent the surface of the sub-reflector and the reflector according to a position of the source, - determine for each pair of values and the diagram of a considered elementary source, the value of the maximum gain of the antenna in the direction of the network lobes, - compare the value of the maximum gain obtained and, if this value is greater than a value of threshold, then vary at least one of the parameters (XSR, ZSR) for the sub-reflector and (XR, ZR) for the reflector, - determine the shape of the antenna from the points that verify the threshold values.