ID |
原文 |
译文 |
13114 |
地海杂波实验研究结果为设计雷达导引头中极化滤波和极化识别算法提供了重要基础,测试数据也可为工程实践提供应用参考。 |
The experi menta! results of ground-sea clutter provde an mportant bass for the desgn of polarzaton flterng and polarzaton recognton algorithm in radar seeker! and the test data also provdde an application reference for engineermg practice. |
13115 |
提出了一种适用于LoRa可穿戴设备的小型化双频段天线。 |
A miniaturized dual-band antenna suitable for LoRa wearable devices is proposed. |
13116 |
该天线由半径为18 mm的基板及上方高6 mm的圆环支架构成,利用顺时环绕单极子、耦合分支在一定小型化的结构上激励出两个低频谐振模式,满足LoRa天线性能要求.实测天线一10 dB阻抗带宽为476〜502 MHz和854〜879 MHz,能够覆盖 LoRa设备在470〜510 MHz和863〜868 MHz的大部分工作频段,同时在490 MHz和865 MHz两个工作频率点测得效率分别为15.56%和27. 91%。 |
The antenna is composed of a substrate with a radius of 18 mm and above the 6 mm high ring bracket. A clockwise surround monopole and coupiing branches are adopted to generate two low-frequency resonant modes on a certai n min i aturi zed structure, wh i ch can meet the LoRa antenna performance requi rements. The antenna achieves -10 dB impedance bandwidth of 476-502 MHz and 854-879 MHz, and can cover most of the workng frequency bands of LoRa devces at 470-510 MHz and 863-868 MHz.The measured eff - ciency at the two operating frequency points of 490 MHz and 865 MHz is 15. 56% and 27. 91% respectively. |
13117 |
该天线结构简单,覆盖频率广,体积小,工作频带内具有良好的辐射性能,具有一定的工程应用价值。 |
The antenna has a s imple structure, a wide coverage frequency, a small volume, and a good radiation performance in the working frequency bands, and has a certan engneering applcation value. |
13118 |
目前,对流层大气湍流造成的随机变化的相位误差已严重影响了高频段深空测控通信系统的工作性能。 |
At present, work performance of the high frequency deep space TTfC system is badly affected by the random change of phase error arose by troposphere atmospherc turbulence. |
13119 |
为了量化湍流强度,基于超短基线干涉仪系统接收的地球同步卫星信号,统计信号干涉相位的标 准偏差,结合经典的Kolmogorov-Obukhov"2/3”扰动理论和随机场理论建立了大气湍流参数计算模型,实时获取表征湍流强度的物理量:大气折射率结构常数蔦。 |
For the purpose of quantifying turbulence intensity, based on the very short baseline CEI receiving GEO satellte signal, the standard deviation of i nterferometer phase are statisticed, using classical Kolmogorov-Obukhov '2/3" turbulence theory and random feld theory, and a method of atmospherc turbulence parameter is proposed to obtain atmospheric refractive index structure constant which can symbolize turbulence intensity. |
13120 |
分别在郑州、杭州进行了连续多天的晴天、雨天相位观测试验!利用试验数据计算,2!并利用气象探空数据经验模型进行了验证。 |
The phase observation experimentations were carried through in Zhengzhou and Hangzhou for a few sunshine days and rany days, and the atmospheric refractve index structure constants were computed by experimentaton data, and compared with the results of experence model using radosonde data. |
13121 |
试验数据计算结果显示%!2,在郑州晴天的正午前后要明显高于早晨和傍晩,而在杭州雨天则没有明显的规律性,蔦在10-15〜10-1!的 数量级范围变化,与经验模型计算的结果相吻合,验证了算法的合理性和准确性。 |
The results show that Cl are much larger at noon than in morning and evening on sunsh ine days, and have no distinct law on rainy days! and are changed between 10415 and 10413 , which i s consistent with the results calculated by experience model to validate the rationality and accuracy of this method. |
13122 |
采用模式匹配法结合优化算法,为新疆天文台110 m天线研制出ー种工作频带为4〜12 GHz 的三倍频多模喇叭。 |
In this paper, the theory of mode-match ing technique(MMT) and optimization algorithm are used to develop a triple frequency multi-mode horn for the 110-meter antenna of Xinjiang Observatory with a work i ng band of 4-12 GHz. |
13123 |
该喇叭由225个圆波导台阶组成,除了加工制造易于实现之外,与常规多模喇叭以及波纹喇叭相比,最突出的优点是在超宽频带内具有等化的辐射方向图,非常适合用作超宽频带射电天文观测天线的高效率馈源或者用于其他需要超宽频带设计的天线。 |
This horn is composed of 225 circular wavegui de steps, which is easy to manufacture. Compared wth tradtonal multi-mode horn and corrugated horn, it has a prominent advantage of equating radaton pattern in ultra wide band. This horn is suitable for high effcency feed for ultra wide band radio astronomy observaton antenna or for other antenna designed for ultra wide band. |