口径效率 aperture efficiency(14)   aperture efficiency      The measured results are as follows: the antenna gain is 21.5 dB with an aperture efficiency of about 46%,the reflection coefficient is about 0.07~0.39 in the range of 6.5~7.5 GHz.      实验测量结果为:增益21.5 dB,口径效率约46%,在6.5~7.5 GHz频率范围内反射系数约为0.07~0.39。 短句来源      The calculated results of the antenna are as follows: the antenna gain is 22.2 dB with an aperture efficiency of 53.7%,the reflection coefficient is 0.07 at the center frequency and less than 0.3 in the range of 6.5~7.5 GHz.      该模式转换天线的数值计算结果为:增益22.2 dB,口径效率53.7%,中心频率上反射系数为0.07,在6.5~7.5GHz频率范围内反射系数小于0.3。 短句来源      In the range of 3.6~4.1 GHz,the experiment result shows the antenna VSWR is below 1.4,the antenna gain is over 22.9 dB and the aperture efficiency is more than 65%.      实验结果表明,在3.6~4.1GHz的范围内,天线驻波比小于1.4,增益大于22.9 dB,口径效率大于65%。 短句来源      At 4.0 GHz,the calculated aperture efficiency reaches 78.2% and the axial ratio at the normal direction is 1.73.In the range of 3.8 GHz to 4.2 GHz,the aperture efficiency is over 73.2%,the axial ratio is below 2.0,the reflectance is less than 0.28,and the radiation efficiency is more than 93%.      在3.8~4.2GHz的频率范围内增益大于20.85 dB,口径效率大于73.2%,轴向轴比值小于2.0,反射系数小于0.27,辐射效率大于93%。 短句来源      In the range of 3.7 -4.05 GHz, the simulated result shows an antenna VSWR of below 1.5. At 4.0GHz, antenna Directivity is 24.26 dB and the aperture efficiency is 78.4%, and the axial ratio is 1.65. In the end, array antenna's power capacity is analyzed and simulated, which proves that this array antenna can radiate high power microwave of 1GW.      对该天线进行了理论分析和数值模拟,结果表明在3．7～4．05 GHz的范围内,天线驻波比小于 1．5,中心频率4GHz下方向性系数达24．26 dB,口径效率78．4％,在轴向轴比值1．65,功率容量达lGw。 短句来源 更多          “口径效率”译为未确定词的双语例句      When feed losses estimated at 0.5dB are excluded, the aperture effciency of the array is found to be approximately 95%.      若不考虑馈源大约 0 .5 d B的损耗 ,阵列的口径效率大约为 95 %。 短句来源      Slotted waveguide array antenna has been used widely in radar and microwave communication systems because of their flat, compact structure, power capacity, realizing low side-lobe and very low side-lobe.      波导裂缝阵列天线由于其体积小、重量轻、口径效率高、功率容量大和容易实现低副瓣及超低副瓣等优点，在机载火控雷达、导弹导引头等方面有着极为广泛的应用。 短句来源      Since the double-ridged horn antenna owns many seductive characteristics, such as ultra broadband, relatively small size, high calibre efficient and gain etc.      由于双脊喇叭天线不仅具备超宽带特性，还具有体积小、增益和口径效率高等优点，因此本文选双脊喇叭天线作为所要设计的超宽带天线。 短句来源      The caliber efficiency of near-field distribution is in inverse proportion to the error variance of the sidelobe level.      近场分布的口径效率与旁瓣电平的误差方差成反比. 短句来源      It's a new way to radiate high power microwave by radial line planar array antenna which has smaller size and higher efficiency.      径向线阵列天线以其轴向长度短、体积小、重量轻、口径效率高等优点为高功率微波的发射提供了一种新的技术手段。 短句来源   相似匹配句对      On Efficiency      论效率 短句来源      enhancing efficiency;      提高效率; 短句来源      High-efficiency frequency doubling usinga large-aperture KDP crystal      大口径KDP晶体高效率倍频 短句来源      Large-aperture high-efficiency frequency doubling using tandem KDP crystals      大口径KDP晶体高效率串接倍频 短句来源      Blockage of aperture antenns      口径天线的阻挡 短句来源 查询“口径效率”译词为用户自定义的双语例句     我想查看译文中含有：的双语例句 为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法，我们为您准备了出自英文原文的大量英语例句，供您参考。   aperture efficiency The computation results compared with our previous method "Multi-Step Amplitude Quantization (MSAQ)" on peak sidelobe level, aperture efficiency, normalized input power and sidelobe degradation with tolerance are given. 例句来源       This expression showed that the average brightness temperature of antenna aperture related with three factors: the noise temperature of noise source, the reflection coefficient of noise source, and the aperture efficiency. 例句来源       The title telescope - in operation since 1982 - gives a surface accuracy of better than 0.2 mm (r.m.s.), with an aperture efficiency of about 25% at 115 GHz. 例句来源       The aperture efficiency can be calculated for blocked and unblocked apertures in analytic form. 例句来源       We also discuss limits on the number of feed elements in an imaging array imposed by the deterioration in aperture efficiency off-axis. 例句来源       更多                    This paper deals mainly with the project of high performance antenna with only sub-reflector modified and simple step dual mode conical horn as feeder source, and its practicable results have already achieved on antennas of microwave relay communication system. A brief introduction of the development process and some basic points regarding scheme selection are presented. The gist of antenna design, the performance of each individual part and the practically measured results are also given. Satisfactory expe...             本文主要介绍仅修正副面,并以简单的台阶双模圆锥喇叭为馈源的高性能天线方案及其在微波中继通信天线上所取得的实用性结果。文中简述了研制概况及方案选择的基点,给出了天线的设计要点、各部分的性能及实测数据。实验表叫所研制的这类天线,在口径效率、频段驻波、交叉极化去耦及辐射方向图等方面得到了满意的结果。批量生产的不同口径及频段的这类天线已用于微波通信系统中。 文摘来源          Several representations of the field-correlation theorem are derived wi- th their application conditions indicated, and an illustrative example is presented. The example shows that the fie1d-correlation method is a very effective approach when it is applied to shape the subrefleetor of cassegrain antennas, and that the theoretical impro- vement of aperture efficiency by greater than O.5 dB has been achieved.             本文系统推导了场相关定理的几种表达形式,指明了它们的应用条件,并介绍了一个应用实例。该例表明,用场相关法进行卡塞格仑天线副反射面的绕射改形是很有效的,在不修改主反射面情况下理论上已得到0.5分贝以上的口径效率改进。 文摘来源          A new concept on the top-plate blockage in a dual-reflector antenna system is described in this paper, It is shown that a "top-plate shadow circle" will be produced on the main reflector aperture when a matching top-plat is placed on the shaped subreflector. Thus, the aperture blockage of the main reflector is augmented and the related antenna efficiency is decreased. To auoid this effect the relevant equation has been corrected.             本文叙述了关于顶板遮挡的新概念,指出了在天线赋形副反射器上加用了匹配顶板之后,将在主反射面的口径上产生“顶板阴影环”,因而加大了口径遮挡并使天线口径效率降低,为了避免这一影响,对相关表达式做了修正。 文摘来源   << 更多相关文摘         相关查询: 效率 口径 拖带效率 复合效率 化成效率 审计效率 查询效率 绘图效率 寻优效率 日效率 扩增效率 效率矩阵  对查询结果不满意

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