Radome is designed to protect the antennas from the external environment . however , radome is interfering with the electromagnetic radiation of antenna , which may result in significant degradation of antenna performance , cause transmission attenuation and beam deflection 天线罩在保护天线不受外界影响的同时对天线的电磁辐射产生某些干扰,使天线的电性能降低,引起天线的传输损耗和波束偏移。
With the development and application of the microwave communication system 、 precision guided technologies and electronic countermeasure etc , the research on dielectric materials such as circuit dielectric substrate 、 antenna unit dielectric substrate and radome are paid more and more attention 随着毫米波通信系统、精确制导、电子对抗等技术的发展和应用,对电路介质基片、天线单元介质衬底、天线罩等介质材料的研究越来越受到重视。
The missile with its radome is at high temperature during the entrance . due to aerodynamics heating process , the high temperature cause air ionization and ablation of the radome , so the radome is at unsymmetrical heat environment , its electrical properties vary with different parts of the radome 导弹在再入过程中,由于空气动力加热效应,引起空气电离和天线罩表面被烧蚀,因此,天线罩处于不对称热环境中,它各部分的介电性能不同。
On the basis of the situation analysis for practical engineering application , it is put forward to add compensating measures in airspace circuit including instruction feedforward , target feedforward , carrier aircraft feedforward and radome refraction compensation to improve the airspace stabilization accuracy 根据实际工程应用中的情况分析，为提高空域稳定精度，提出了在空域稳定回路中加入补偿措施，即指令前馈、目标前馈、载机前馈和天线罩折射补偿。
The radiation patterns with and whitout radome are calculated , and the angle difference in the maximum field point of their main clot show the bse of the radome , the bse from - 15 degree to 15 degree in direction , that been calculated and compared with the excited experimented data shows they coincide quite well 有天线罩时的远区场和没有天线罩时的远区场相比较,两个主波束对应的角度差即是天线罩的瞄准误差,本文对方位扫描角从负15度到正15度进行分析。
In addition , the mom - po hybrid method is proposed to dissect radiation from radome - enclosed antennas and the correction impedance matrix upon which the solution to equivalent currents of radome ' s surface depend is built . a comparative analysis of those methods is finally presented to examine respectively their accuracy as well as computational efficiency 最后，对矩量法物理光学法的混合算法分析问题的过程进行讨论，给出混合算法分析带罩天线辐射问题的具体解决方案，建立混合算法求解天线罩表面等效电磁流的校正矩阵。
Finally , the reconstructed surfaces were used in computer aided visualization of electrical design of airborne radome . on contrary to the traditional way of computing the angles of incidence by solving the problem that where the ray of electromagnetic waves intersected with the surface of radome , our method can express the distribution of the value of the angle of incidence on airborne radome succinctly and efficiently 最后将重塑曲面应用在某型飞机雷达罩电性能参数的计算机辅助可视化设计中,改进了原有方法通过雷达电磁波入射线同雷达罩表面曲面求交解方程获得入射角的繁琐设计方式,快速直观有效地表达了入射角参数在雷达罩表面的分布情况。
