辐射效率

然而，随着天线尺寸的缩小，RFID标签天线的辐射效率也会降。

However , as the antenna size shrinks , the RFID tag antenna radiation efficiency would drop .

通过综合运用以上措施和最优化设计，实现了一种尺寸较小且辐射效率较高的新型天线形式，并使用3D电磁仿真软件HFSS验证了该方案的可行性。

A new size reduced antenna with high radiation efficiency is realized by using these methods and optimization design . At last the feasibility of this antenna is proved through 3D electromagnetic simulation software HFSS .

这些天线设计简单、可用CMOS工艺制造、利于集成，兼有宽频、高辐射效率、小尺度等优点。

Structures of antenna are simple , and it is machined by CMOS technology , it is easy to integrate with other circuit .

因此，根据复极点的值可以确定Rayleigh泄漏波的整个特性，包括激发和再辐射效率。

Therefore , the complex pole may determine the whole behavior of the leaky Rayleigh wave , including the excitation and reradiation efficiencies .

本文讨论了复杂振动物体的辐射效率σ（rad），并根据点辐射阻抗的概念推导了计算公式。

This paper discusses the radiation efficiency σ _ ( rda ) of a complex vibrating body and gives its formulas in terms of the concept of point radiation impedance .

在分析了此计算结果的基础上，对一种新型的五电极结构的PDP单元进行了模拟，与原来的传统三电极结构相比，其真空紫外辐射效率提高17%。

The ultraviolet radiation of a new type of 5 electrode PDP cell was also numerically simulated and its vacuum ultraviolet radiation efficiency was found to be 17 % higher than that of the conventional 3 electrode PDP cell .

通常燃料选择天然气，本文对贫天然气/空气混合物在催化燃烧炉中Pt催化剂中毒特性和辐射效率进行了研究，分析了由于天然气中H2S的出现导致Pt催化剂的老化。

Very often , the fuel in such devices is natural gas . Poisoning effect of the Pt catalyst and radiation efficiency for lean natural gas-air mixtures were investigated in a catalytic combustion burner . The Pt catalyst ageing because of the presence of H2S from natural gas is analyzed .

结果表明，要提高185nm辐射效率，需采用细管径放电管并在较大电流和较高管壁温度下工作。

It is shown that smaller diameter , higher current density and higher wall temperature are necessary to increase the 185 nm radiation efficiency .

然后结合SYS-NOISE软件和AUTOSEA软件分别计算壳体在流场中声辐射效率在低频段和高频段时的频率响应。

Then , the radiation efficiency at low frequency and frequency response at high frequency in fluid are computed respectively by both SYSNOISE software and AUTOSEA software .

平板声辐射效率的级数表达式

The Acoustic Radiation Efficiency of A Rectangular Plate by Using Series Expression

内燃机部件声辐射效率研究（一）&原理及方案设计

Sound Radiation Efficiency of Engine Parts (ⅰ) & Theory and Experiment Scheme

发动机表面辐射效率及辐射噪声

The Radiated Efficiency and Radiated Noise of Engine Surfaces

平板截止频率附近辐射效率修正算法

An Improved Formula for Calculating Radiation Efficiency of Plate Around the Cut-off Frequency

圆柱壳体振动声辐射效率数值计算分析

The Numerical Analysis of Vibration and Sound Radiation Efficiency from a Cylindrical Shell

对平板的速度分布及其对应辐射效率的探讨

The Study of the Velocity Profiles and the Corresponding Radiation Efficiencies on a Plate

不同预淀积层银膜表面等离子激元波的辐射效率

Efficiency of Emission from Surface Plasmon Waves of Ag Films for Different Pre Coated Layers

仿真结果表明，这种新型电小天线极大程度上提高了辐射效率。

It is demonstrated that this novel electrically small antenna has extremely high radiation efficiency .

论烤漆烘道设计中的两个重要参数&红外辐射效率和热转换效率

On the Efficiency of IR Radiant and Thermal Conversion in the Design of Baking Tunnel

并且天线在低频和高频都有较高的辐射效率。

Furthermore , the antenna radiation efficiency is good at the lower and the higher band .

讨论了影响声辐射效率的因素以及相应的水下声强测试分析方法；

The influences on the emission efficiency as well as the method of sound intensity survey were discussed .

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。

Thus a completely numerical compute analysis method is established in fluid about vibrational radiation efficiency at full frequency .

简要介绍了天线的性能指标，如方向性系数和辐射效率等。

The performance indexes for antenna have been presented briefly , such as diversity and radiation efficiency . 3 .

通过矩量法计算了碳纳米管天线在不同谐振频率下的表面电流分布和辐射效率。

By moment method , the surface current distribution and radiation efficiency of carbon nanotube antenna have been studied .

也就是说，要求高的信号保真度，必将导致低的辐射效率。

Thatis to say , to demand high fidelity of signal , it would have to lower the radiation efficiency .

结果表明，与普通锯片相比，它们都能有效的降低热应力应变，能降低辐射效率，但发生强烈振动的几率增大。

The result shows that the thermal stress , distortion and radiant efficiency of noise are decreased compared with conventional saw .

波导缝隙阵列天线由于结构紧凑，辐射效率高，性能稳定，重量轻等优点被广泛应用于雷达系统和卫星通信。

Geometric simplicity , efficiency , reliability and light weight make waveguide slot-antenna widely used in radar system and satellite communication .

船舶结构的水下噪声预报所依据的声辐射效率通常用试验手段得到。

The radiation efficiency which is widely used in predicting the underwater noise of ships is usually obtained through the experiments .

其中导致片上天线辐射效率低的最主要原因是硅衬底的低电阻率。

The most important reason that leads to the low radiation efficiency forthe antenna on chip is the low resistivity in silicon substrate .

由于纳米管内电子运动固有的弹道输运效应，使得纳米管阵列天线具有辐射效率高的优点。

The intrinsic ballistic transportation of electrons in nano-tube makes it possible for antennas consisting of nano-tube array to radiate with higher efficiency .

作为实例，最后还对简支、固支、自由平板的声辐射效率进行了计算与讨论。

As an example , the radiation efficiency of the simply-supported , clamped and free square plate is computed and discussed in the paper .