查询词典 antenna array

The resolution coupling suggests the joint design of waveform, antenna and receiver in the nonsinusoidal radar systrem.

距离、速度和角度的三维耦合关系导出了非正弦波雷达信号波形、天线和接收机联合设计的新思路。

And the nonsinusoidal radar signal's space-temporal correlation means, that from one side there is change of signal form depending on radiation or receiving directions, from other side, there is the change of antenna directivity characteristics depending on signal form.

而天线的时空相干性又表明，非正弦波信号的空间位置影响其时域波形，反过来，距离分辨力也影响角度分辨力。

From the angle of a beam-forming, the cross- range focusing principle of the synthetic-aperture radar based on nonsinusoidal waves is studied. The expressions of antenna pattern for both rectangular signa l and Gaussian signal are presented. Compared with the conventional narrow bandw idth SAR whose cross-rang resolution is determined by the carrier frequency, th e cross-range resolution of the nonsinusoidal SAR is affected by the signal ban dwidth.

为研究非正弦波SAR的方位向分辨力，从波束形成的角度分析了非正弦波SAR的方位向聚焦原理，导出了基于矩形脉冲和高斯脉冲的合成孔径天线阵列方向图表达式，并与常规窄带SAR进行比较，指出影响非正弦波SAR方位向分辨力的主要因素为合成孔径长度和信号带宽，而与信号载频无关。

There were two types for sensilla trichodea. Some bohm bristles formed sensilla cluste r on antenna of nymphae

其中毛形感器有2个类型，若虫触角上的部分蒲姆氏鬃毛组合成弧形感觉簇。

There w ere two types for sensilla trichodea. Some bohm bristles formed sensilla cluste r on antenna of nymphae.

其中毛形感器有2个类型，若虫触角上的部分蒲姆氏鬃毛组合成弧形感觉簇。

Antennal morphology and sensilla of A. suturalis were studi ed w ith scanning electron microscopy. The results showed that four types of sensilla were observed on the antenna of adults and nymphae, including sensilla chaetica , sensilla trichodea, sensilla basiconca, and bahm bristles, and no morphologic a l difference was found in these sensilla between male and female adults.

采 用扫描电镜技术对其触角形态和感器进行观察，结果表明：中黑盲蝽雌雄成虫及若虫触角上分布4种类型的感器，分别为刺形、毛形、锥形和蒲姆氏鬃毛，且这些感器不存在性二型现象。

Antennal morphology and sensilla of A. suturalis were studi ed w ith scanning electron microscopy. The results showed that four types of sensilla were observed on the antenna of adults and nymphae, including sensilla chaetica , sensilla trichodea, sensilla basiconca, and bhm bristles, and no morphologic a l difference was found in these sensilla between male and female adults.

采 用扫描电镜技术对其触角形态和感器进行观察，结果表明：中黑盲蝽雌雄成虫及若虫触角上分布4种类型的感器，分别为刺形、毛形、锥形和蒲姆氏鬃毛，且这些感器不存在性二型现象。

Electrical characteristics and radiation characteristics of papery substrate small loop antenna were calculated and simulated.

以UHF(860~960 MHz)频段的RFID标签天线设计为背景，对以纸质基材为天线衬底的小环天线的阻抗特性和辐射特性进行了理论计算和仿真。

In this thesis, FDTD method and the far field integration method are introduced and used in study of radiation characteristics of the dielectric parallelly loaded dipole antenna for pulse radiation.

本文用FDTD方法研究了脉冲天线在并联加载介质块后的辐射特性，并在共形网格算法的改进上做了一些探索。

The male prosopon body is tall and slender,is smaller than the female prosopon,0.6-3.0mm,the antenna growth is approximately good,reads beaded,the garnet,has the little white wax powder.

雄成虫体细长，比雌成虫小，约0.6—3.0mm，触角发育良好，念珠状，暗红色，有少许白色蜡粉。

"Second Life is remarkably easy to work with, and is very popular,"

"第二次生命是显着容易的工作，并且很受欢迎，"

For example, we usually assume that materials are homogeneous and isotropic and free of internal defects or flaws.

为了得到适合有限元分析的模型，我们必须经过如图2所示的简化步骤。