Actual deviation correction based on weight improvement for 10-unit Dolph–Chebyshev array antennas

In order to achieve higher gains and lower side lobe in antenna design, array antenna is conventionally adopted. Besides, Chebyshev polynomial amplitude ratio is widely employed in the design, and it optimizes the main and side lobes under specific main lobe width and side lobe level. However, the actual product can be easily affected by machining error and the antenna material property, which change along with the frequency. The influence is evident at millimeter waves level owing to the short wave length. In micro-strip antenna applications, the test frequency for key parameters of high-frequency base material is limited by 10 GHz, while the parameters have no explicit definition at higher frequency. Therefore, a large mismatch between the design and actual product may exist when the frequency reaches 77 GHz or higher. In this paper, a weighting method is proposed to compensate parameters of the base material and machining error. Based on this method, simulation result of the design is revised to match tested result of actual product.