Novel Thermally Stable Segmented Solid Paraboloid Antenna for High Surface Accuracy

Abstract

The rapidly growing communication demands in our society require the design of highperformance solid paraboloid antennas with extremely high surface accuracy, which remains a challenge due to the inevitable thermal deformations. In this study, we proposed a novel design of thermally stable segmented solid surface antenna with high surface accuracy. In this novel design, the antenna reflector is divided into a certain number of segmented pieces, each of which is then individually supported by an innovative Thermally Stable Grid Structure (TSGS). An analytical model based on Sanders improved first-approximation shell theory is developed to predict the thermal deformation of antenna surface, with which the proposed segmenting method in improving the surface accuracy of reflector antenna is theoretically approved. The working mechanism of the proposed TSGS that the thermal deformations at

Rapid Deformation Calculation for Large Reflector Antennas: A Surrogate Model Method

“…The best-fitting paraboloid expressed in the old Cartesian coordinate system can be obtained through Equations ( 1)-( 3) and is shown in Equation (4) (Wu et al 2021). The higherorder terms of the six parameters were omitted in the calculation process.…”

“…The goal of the least-squares method is to calculate the parameters of the best-fitting paraboloid to minimize the objective function, as shown in Equation (7). According to the extreme value theorem of calculus, the objective function takes the minimum value when Equation (8) is established (Wu et al 2021). where M is the number of nodes on the main reflector.…”