| ID | 原文 | 译文 |
| 19305 | 针对双频段低剖面椭圆波束天线的需求，该文提出了一种新型混合结构椭圆波束天线的设计技术。 | In order to satisfy the requirement of elliptical beam antenna with low profile, a novel design technique of the hybrid-structural antenna with elliptical beam is proposed. |
| 19306 | 该混合结构由主、副反射面内环部分构成的椭圆波束环焦天线和外环部分构成的椭圆波束卡塞格伦天线组成。 | The hybrid-structural antenna consists of the ring-focus elliptical antenna in inner-ring region and the Cassegrain elliptical antenna in outer-ring region. |
| 19307 | 该文描述了椭圆波束天线的设计思路、设计步骤和赋形计算公式，给出一个600 mm×1200 mm椭圆波束天线的设计实例，并进行了容差分析，该天线的工作频率覆盖了Ku/Ka双频段，效率达到56%以上，电压驻波比(VSWR)低于1.27，俯仰面第1旁瓣低于–12.2 dB，方位面第1旁瓣低于–14.6 dB。 | The design method, procedure and shaping formula are presented in detail. A 600 mm×1200 mmreflector antenna is designed and its tolerance analysis is also given. The results show that the novel structural antenna can operate in Ku/Ka dual bands, antenna efficiency is greater than 56% and Voltage Standing WaveRatio (VSWR) is better than 1.27, and its side lobe levels in the EL and AZ planes are below –12.2 dB and–14.6 dB respectively. |
| 19308 | 商业软件Grasp和CST全波仿真的结果吻合很好，证明了该新颖结构和设计方法的有效性。 | The simulated results of Grasp and CST software agree well, which verify the effectiveness of the design method. |
| 19309 | 人们常用Rohling教授提出的3种典型背景即均匀背景、多目标和杂波边缘来对检测器的恒虚警率(CFAR)性能进行衡量， | The performance of a Constant False Alarm Rate (CFAR) detector is often evaluated in three typical backgrounds - homogeneous environment, multiple targets situation and clutter edges described by Prof. Rohling. |
| 19310 | 但在现有的文献中缺乏秩和(RS)非参数检测器在杂波边缘中虚警概率的解析表达式，缺乏RS检测器与经典的参量型恒虚警率(CFAR)检测器在杂波边缘中虚警控制能力的比较，这在理论研究上是不完整、不全面的。 | However, there is a lack of the analytic expression of the false alarm rate for the Rank Sum (RS)nonparametric detector at clutter boundaries, and lack of a comparison of the ability for the RS detector tocontrol the rise of the false alarm rate at clutter edges to that of the conventional parametric CFAR schemes;which is incomplete and imperfect for the detection theory of nonparametric detectors. |
| 19311 | 该文给出了RS检测器在杂波边缘中虚警概率的解析表达式，并比较了它与非相干积累单元平均(CA)，选大(GO)和有序统计(OS)恒虚警方法在杂波边缘中的虚警控制能力。 | The analytic expression of the false alarm rate Pfa for the RS nonparametric detector at clutter edges is given in this paper, and the ability of the RS nonparametric detector to control the rise of the false alarm rate at clutter edges is compared to that of the Cell Averaing (CA) CFAR, the Greatest Of (GO) CFAR and the Ordered Statistic (OS) CFARwith incoherent integration. |
| 19312 | 可以看出，在强、弱杂波均为瑞利分布的情况下，RS检测器在杂波边缘的虚警控制能力处于非相干积累CA方法和非相干积累OS方法之间。 | When both of the heavy and the weak clutters follow a Rayleigh distribution, it is shown that the rise of the false alarm rate for the RS detector at clutter edges lies between that of the CA-CFAR and that of the OS-CFAR with incoherent integration. |
| 19313 | 但是当长拖尾分布的非高斯杂波进入参考滑窗时，非相干积累CA, GO和OS参量型检测方法的虚警概率都产生了3个以上数量级的上升，且不能回到原始设定的虚警概率。 | If a non-Gaussian distributed clutter with a longtail moves into the reference window, the rise of the CA-CFAR, the GO-CFAR and the OS-CFAR with incoherent integration reaches a peak of more than 3 orders of magnitude, and can not return to the original pre-designed Pfa. |
| 19314 | 而RS检测器显示出了非参量检测器的优势，即当杂波背景的分布类型发生变化后，它仍然可以保持虚警概率的恒定。 | However, the RS nonparametric detector exhibits its inherent advantage in such situation, it can maintain a constant false alarm rate even the distribution form of clutter becomes a different one. |