ID 原文 译文
13814 在工作频段内最大增益达到8.0dB, 相比埋藏前的最大增益8.5dB降低了0.5dB, 但是该天线的增益还是达到实际天线要求的, 且增益降低幅度小。 The maximum gain in the operating band reaches 8.0 dB, which is 0.5 dB lower than the maximum gain of 8.5 dB of the general antenna, but the gain of the dielectric embedded antenna reaches the actual requirement of the antenna and the gain reduction is small.
13815 所设计天线在方向图、驻波比、阻抗匹配等性能上都满足实际条件, 并且具备更宽的半功率波束宽度。 Microstrip dielectric embedded antenna with cylindrical conformal in the antenna pattern, standing wave ratio, impedance matching and other properties to meet the actual conditions, and have wider half-power beam width.
13816 针对在军工装备上日益重要的雷达天线频率选择表面 (frequency selective surface, FSS) , 分析了FSS雷达散射截面积 (radar cross-section, RCS) 的特征, 以及和金属表面RCS的区别, 并澄清了产生这种差异的内部机理, 为改善FSS天线罩以及类似腔体的RCS提供了理论指导和解决问题的思路和方法。 In view of the increasingly important radar antenna frequency selection surface (FSS) on military equipment, the characteristics of the FSS radar cross section (RCS) area and the difference from the metal surface RCS are analyzed, and the internal mechanism of this difference is clarified, which provides the theory guidance and solution for the improvement of the FSS radome and the similar cavity RCS Method.
13817 首先从理论上分析了覆盖频选表面的雷达腔RCS的产生机理, 然后用全波严格仿真算法计算了不同雷达腔RCS的数据, 并结合内部场图认证了前面的理论分析结论。 Firstly, the generation mechanism of the radar cavity RCS covering the frequency selection surface is theoretically analyzed, and then the data of different radar cavity RCS are calculated with the full wave rigorous simulation algorithm, and the theoretical analysis conclusion of the front is authenticated with the internal field map.
13818 理论和仿真分析表明, 频选带外的高反射特性并非像金属表面那样完全反射电磁信号, 必须考虑频选天线罩的透射和罩内的腔体效应导致的电磁波能量聚集和二次辐射, 这些因素对覆盖频选雷达腔体的RCS产生很大的影响。 The theoretical and simulation analysis shows that the high reflection characteristics outside FSS are not fully reflecting electromagnetic signal as the metal surface. The transmission of the radome and the electromagnetic wave energy accumulation and the two radiation caused by the cavity effect in the mask must be considered. These factors have great influence on the RCS of the frequency selective radar cavity.
13819 最后, 提出了一种利用吸波材料减少腔体谐振效应和能量汇聚从而改善频选罩RCS的方法, 取得了良好的效果, 在大部分频段, 该方法使RCS改善达10dB以上。 Finally, a method of reducing cavity resonance effect and energy converging to improve the frequency selection mask RCS is proposed, and the method makes the improvement of RCS up to 10 dB in most frequency bands, which has achieved good results.
13820 设计了一种基于吸波材料的屏蔽领结天线, 采用金属腔体提高天线的方向性, 并起到屏蔽作用。 An ultra wideband pulse transmitting antenna based on bow tie antenna was designed. The metal cavity was used to improve the directivity of the antenna and played a shielding role.
13821 通过在腔体内部填充吸波材料, 来降低电磁波在金属腔内部的反射, 并改善天线的频率域特性和时间域信号的拖尾。 The absorbing material in the cavity reduce the reflection of electromagnetic wave in metal cavity, and improve the antenna frequency domain characteristics and time domain signal.
13822 通过有限元电磁仿真软件HFSS设计天线模型, 优化天线参数。 The finite element electromagnetic simulation software HFSS was used to design the antenna model and optimizate the parameters of antenna.
13823 实际天线的各项参数较加吸波材料和金属腔之前得到了有效改善：频率域上, 天线的中心频率有所降低, -10dB以下带宽从原来的100MHz提高至200 MHz；时间域上, 脉冲信号的宽度降低, 信号拖尾得到了明显改善。 Compared with the absorbing materials and metal cavities, the parameters of the actual antenna are effectively improved. The center frequency of the antenna is lower, and the bandwidth below-10 dB increases from 100 MHz to 200 MHz. The width of the pulse signal is reduced, the signal tailing is eliminated.