English translation for "方向性系数"

directivity factor
directivity of an antenna
pattern propagation factor

Related Translations:

方向性检索:  aspect indexing

方向性凝固:  directional solidification

天线方向性:  aerial directivityantenna directivitydirectivity diagram of an antennadirectivity of antennadirectivity; antenna

方向性屏幕:  directional screen

方向性照明:  directional lighting

方向性价格:  orientation price

方向性扩散:  directional diffusenessdirectional diffusibilitydirectional divergencedirectional doffuser

方向性传声器:  directional microphone

方向性优势:  directional preponderance

方向性增益:  directional gaindirective gaindirectivity gain

Example Sentences:

	1.	Its band structure is analyzed . after the working frequency is selected , the meta - material cover increases the patch antenna ' s directivity by 9 . 14db 在选定的工作频率，异向介质覆层将贴片天线的方向性系数提高了9 . 14db 。
	2.	Phased - array radiation lobe is superposed by isometric array element with constant amplitude . using the concept of real and imaginary space , the scanning lobe is researched 通过“实虚空间”的概念,分析了扫描中的阵列波瓣,总结给出相控阵天线的方向性系数。
	3.	Its size is small ( with an unit length of about 23 . 7 % of the wavelength in the cover medium ) , and its effectiveness is evident ( the patch antenna ' s directivity is increased by 3 . 16db ) 这种结构具有尺寸小(边长仅为介质中波长的23 . 7 ) 、效果明显(将贴片天线的方向性系数提高了3 . 16db )的优点。
	4.	Combining this pmc structure with the pbg cover maintained above , a new patch antenna with a pmc substrate and a pbg cover has been introduced for the first time . such a structure can increase the directivity more effectively ( the directivity is increased by 7 . 3db ) . 4 结合这种pmc结构和第2点中提到的pbg覆层，首次设计出了具有pmc基底与pbg覆层的新型贴片天线，对方向性改进效果更加显著(将贴片天线的方向性系数提高了7 . 3db ) 。
	5.	The result shows that the pbg structure has obvious character of forbidden band at the suitable size , and can be designed to good performance microwave filter . the pbg structure have the character of high resistance , that can reinforce the forward radiation , and reduce the backward radiation , increase the directivity , improve the gain and ameliorate the performance of the antenna . in addition , the pbg structure can also greatly increase the isolation and significantly decrease the coupling between the antenna elements 研究结果表面，取合适的尺寸时， pbg结构具有明显的禁带特性，可以设计成性能良好的微波滤波器； pbg结构具有高阻特性，把这种特性用于微波天线时， pbg结构可以加强前向辐射，减小后向辐射，增大天线的方向性系数，从而提高天线的增益，改善天线的性能，另外， pbg结构还可以大大提高天线单元之间的隔离度，显著减小天线单元间的耦合。
	6.	The performance of the pbg antenna using the new pbg cover together with a pbg substrate is studied by the fdtd method together with the pml boundary treatment . the numerical results show that a more focused beam radiated in the broadside direction is achieved . the gain of the pbg patch antenna in the forward direction is improved by about 6 db . the radiation directivity is improved significantly and reaches 11 . 5 db , which is 0 . 4 db less than the maximum value that is allowed physically for this size of the antenna ( this difference is about 4 . 1 db less than the difference achieved by thevenot et al . , 用fdtd方法并结合pml吸收边界条件，我们对加了这种新的覆层结构并且基底钻孔的复合结构电磁(光子)晶体贴片天线的性能进行了研究，结果证明加了这种新的电磁晶体覆层结构以后，天线的波束收拢很多，并且向前辐射的增益大大提高，与普通天线相比，天线的e面和h面方向图上向前辐射的增益均提高了约6db ，另外，该复合结构天线的方向性系数达到了11 . 5浙江大学博士学位论文db ，与该物理尺寸天线的方向性系数的理论极限值( 11 . 9db )相差0 . 4db ，该差值比thevenot等人设计的电磁晶体覆层天线的相应差值减少了约4 . 1db ，比qiu等人设计的电磁晶体天线的相应差值减少了约1
	7.	Presented in this paper is the investigation of some problems existing in the far - field method widely used in hpm measurement . first , the errors are analyzed from the practical calculation of the directivity for the radiation of the te11 mode in the circular waveguide . secondly , the results obtained from simulation and experiments are compared with each other on the effective area of the receiving antenna of certain types , and the power capacity are calculated for these antenna 首先,对圆波导te11主模辐射方向性系数实际计算中存在的误差进行了分析;其次,对一些型号的接收喇叭有效面积进行了模拟和实测对比,并通过计算给出了这些型号的接收喇叭的功率容量;最后,实验测定了微波脉宽对一些微波器件? ?同轴型检波器、同轴型衰减器及微波电缆性能的影响。
	8.	The results show that in the case of the radiation of the pure te11 mode , dh is less than d with their difference ranging from 0 . 1db ~ 0 . 8db , and de is larger than d with a difference between - 1 . 9db and - 1db , and that in the case of the radiation of the mixed modes of te11 and tm01 with power proportions from 5 % to 30 % , dh is still close to d with the maximum difference less than 1db , while the difference between de and d can be as large as - 4db Te11模中含有一定量的tm01模式时,比如, tm01模式占功率比为5 - 30 % , dh仍接近模拟值d ,最大误差小于1db ;而d与de的最大差值将近- 4db 。可见, h面的方向性系数与实际的方向性系数偏差要小一些。
	9.	In the circumstances of the te11 mode mixed with the given parasite modes , the errors from the practically used directivity can be corrected with the calculated difference between dh and d . the effective area of the receiving antenna is calculated with the established models , and measured at some points in the given frequency range 在已知混入te11模式中杂模成份及其比例的情况下,可以通过计算出dh与d的差值,对采用的方向性系数进行误差修正。通过建立相应模型,对接收喇叭的有效面积进行了计算,并在部分频率点上进行了实测。
	10.	The antenna gain , directivity and reflection coefficient are calculated via finite element method in hfss . spline interpolation and polynomial curve fitting are applied to construct diagrams illustrating the capsulation characteristics . some general conclusions of interest are obtained 探讨了各个封装参数对输入端反射系数、方向性系数、效率和增益等性能指标的影响，得到一些规律性结论，为射频振子天线的封装应用提供了参考性的建议，并指出了进一步研究的方向。

Similar Words：

"方向性屏幕" English translation, "方向性水听器" English translation, "方向性图" English translation, "方向性图案叠加" English translation, "方向性图形" English translation, "方向性效应" English translation, "方向性信号" English translation, "方向性性质" English translation, "方向性移相器" English translation, "方向性移向器；回转器" English translation