Far‐Field Pattern Tolerance Analysis of Reflector Antenna with Random or System Error Based on Interval Arithmetic

The Establishment and Analysis of the Structural-Electromagnetic Coupling Model of the Electrostatically Controlled Deployable Membrane Antenna

“…There are two traditional solutions to this problem: 1) a new reflector surface is fitted from the structural elements then the electromagnetic grids can mesh on the new surface, however, the structure errors cannot be accurately reflected in the electromagnetic analysis; 2) the electromagnetic grids are meshed on the structural elements directly, in this method the structural elements are usually plane and the grid discretization errors will be introduced especially in the high-frequency analysis. To solve this problem, Li et al [11], [12] proposed a grid conversion method by selecting Gauss integration points inside each structural element instead of refining the structural elements, the displacement of internal calculating points is obtained by the finite element linear shape functions interpolation. This method improved the electromagnetic analysis, however, the internal calculating points are on the planer structural element which has no benefit in reducing grid discretization errors.…”