![]() ![]() This solves the structure quickly, but the gain decreases compared to default in such cases. Default Cassegrain antenna generates more number of triangles, so it can be meshed manually for different mesh edge lengths for the required numbers of triangular generation. ![]() Plot the radiation pattern of cassegrain antenna at 18GHz.The expected pattern need to generate a pencil like beam with less spill over and minor lobe radiation. Normally the expected diameter of subreflector is to be less than 20% of main reflector to minimize the blockage by the subreflector. Typically, if the diameter sub reflector is greater than 5, then it is recommended to use PO solver for it. Solvers are used according to the size of main reflector and subreflector. Diameter of main reflector is 39 and that of sub reflector is 4. Default cassegrain antenna uses PO solver for main reflector and MoM solver for sub reflector and exciter. ![]()
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