EM Performance Improvement of a Large A-type Sandwich Radome

Large sandwich radomes are widely used for radar antennas because of the desired some characteristics. They are constructed by connecting small panels for the restrictions on manufacture. These connection parts yield undesired scattered waves and generate higher sidelobes. We present a novel method to overcome this problem by optimizing the radome geometric design. The scattering characteristics of radome seams are simplified by using physical optics technique with some corrections. This method achieves the fast computation that is appropriate for iterative optimization. Simulated annealing method is used to obtain the optimized radome geometry that has well-behaved sidelobes. Simulation results are also presented in order to validate our proposed method. It is shown that the desired radiation pattern is obtained.