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A quasi-Yagi antenna with opposite radiation patterns at two working bands is proposed in this letter. By adding split-ring resonators (SRRs) into a quasi-Yagi antenna that only has a reflector and a dipole originally, the other resonant point is generated. New antenna with two SRRs placed near the reflector can realize a -direction radiation at 2.11 GHz and -direction radiation at 2.30 GHz...
In electromechanical coupled analysis of large reflect antennas, the mesh for structure analysis does not match with the mesh for electromagnetism analysis. For this problem, the geometrical optics method is used for electromechanical coupled modelling. A transformation matrix for different meshes has been deducted based on the structure mesh. Use this transformation matrix and improved Gaussian integral...
On the inefficient panel adjustment of large reflector antenna, a method for determination of panel adjustment magnitude according to far field pattern is presented. Using the method of Physical Optics (PO), the relationship between the far field value and the node displacement is derived. Then the panel adjustment vector is related to far field pattern with linear equations. Singular value decomposition...
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