您要查找的是不是：
- An Improved Method for the Measurement of Antenna Radiation Efficiency 一种改进的测量天线辐射效率的方法
- antenna radiation efficiency 天线辐射效率
- The present invent ion utilizes the top loading technique and the smooth tapering technique to create the design of a compact and built-in antenna which will provide a planar antenna structure with broad bandwidth and high radiation efficiency. 馈入传输线的宽度大致与渐变带段的底边同宽，且顶边与渐变带段的底边密接，而底边藕接至频电路。
- The parameters investigated include the far-field antenna patterns, radiation efficiency, bandwidth, surface-wave losses and the reflection coefficient at the antenna-feed junction. 所计算的参数包含天线的远场波形、辐射效能、频宽、表面波损耗及共面波导管与天线连接处的反射系数等。
- Experimental results show that the electromagnetic radiation efficiency and bandwidth of the proposed antenna prototype are prior to traditional microstrip antennas. 实验结果表明，由准一维量子线构成阵列天线的电磁辐射效率和带宽均优于传统微带天线。
- Thus a completely numerical compute analysis method is established in fluid about vibrational radiation efficiency at full frequency. 从而建立一套圆柱壳体在流场中振动声辐射效率在全频段的数值计算分析方法。
- Numerical analysis of vibration awl sound radiation efficiency from a submerged cylindrical shell has been carried out by using FEM methods, BEM methods and statistical energy methods. 摘要利用有限元、边界元和统计能量分析方法并结合软件对圆柱壳体在流场中受激振动及声辐射效率作了数值计算分析研究。
- satellite antenna radiation patter 卫星天线辐射方向图
- Design and manage antenna radiator(FPC& Sheet metal) and carrier(plastic), design mechanical fixtures and RF jigs. 设计和跟踪手机天线（柔性印刷线路和金属片）和天线支架（塑料件），设计工装夹具和测试夹具；
- High heat radiator efficiency let the heat spill out the cabinet quickly. 本机内置快速散热系统；可以将本机工作的热量顺利排出。
- antenna radiation characteristic 天线幅射特性
- Results are presented for the sound radiation efficiency and power of the modes of the rectangular baffled plate subjected to simply-supported boundary conditions when the plate is excited by obliquely incident plane wave. 通过计算，得到了嵌在无限大障板中简支板模型在斜波入射作用下的声辐射功率和辐射效率。
- satellite antenna radiation pattern 卫星天线辐射方向图
- The characteristic of antenna radiating, target reflecting, receiving and processing in wideband phased array radar system are then analyzed in theory. 然后从理论上详细分析了宽带相控阵雷达系统在天线辐射、目标反射、信号处理等方面不同于经典雷达理论的特征；
- Based on the modal analysis and harmonic respondence analysis of piping system, the acoustic radiation efficiency is calculated;therefore it illustrates the connection between the vibration and noise. 摘要基于管道振动的模态分析及谐响应分析，计算管道的声辐射效率，建立结构体振动与其辐射噪声之间的关系。
- Numerical analysis of vibration and sound radiation efficiency from a submerged cylindrical shell has been carried out by using FEM methods,BEM methods and statistical energy methods. 利用有限元、边界元和统计能量分析方法并结合软件对圆柱壳体在流场中受激振动及声辐射效率作了数值计算分析研究。
- antenna radiation characteristics 天线辐射特性
- A theoretical method to solve acoustical radiation modes and acoustical radiation efficiency of complex structure by a boundary element method and acoustical radiation theory is posed in this paper. 提出一种用边界元方法与声辐射理论求解复杂结构的声辐射模态与声辐射效率的理论方法。
- The flashlamp has higher radiation efficiency compared with previous flashlamps.High explosive energy and satisfactory life time ensure its large output energy and good working stability. 研制的细长型高功率脉冲氙灯，其极限负载能量大、工作寿命长、辐射效率高，工作性能较原先脉冲氙灯有很大的改进和提高。
- A simple computational method for the vibration frequencies and modal radiation efficiencies of clamped baf-fled square plate in water is described. 摘要本文提出了一种简便计算置于无限大障板上的方板水中振动频率以及辐射效率的计算方法。
