查询词典 waveguide

Narrow waveguide after input section can effectively filter out the high modes which cause the ununiformity of Y-branches and has little influence on the length and excess loss of the device.

在输入波导后添加一段起模式过滤作用的窄波导结构，可以在对器件长度及损耗影响很小的情况下，有效滤除高阶模，减小干涉效应，改善器件输出的均匀性。

At the designed operating frequency, the refractive index approximates zero, which makes the nondirective electromagnetic wave tend to approximate plane wave along the normal direction of the superstrate and congregate the radiation energy. The gain patterns of the rectangular waveguide antenna and arrays with and without DNG structure are compared.

比较了双负媒质结构加载前后矩形波导天线及其阵列的增益方向图，数值仿真和测量结果表明，天线的前向增益得到显著的提高，同时对后向辐射也有一定的抑制效果。

The DNG structure unit is composed of square split ring resonator and strip wire. The modified NRW method is used to extract the equivalent permittivity, permeability, and refractive index from the scattering parameters of the two-port waveguide with DNG structure. At the designed operating frequency, the refractive index approximates zero, which makes the nondirective electromagnetic wave tend to approximate plane wave along the normal direction of the superstrate and congregate the radiation energy.

以方形的SRR环和金属条带构成双负媒质结构单元，使用修正的NRW方法，通过放置双负媒质结构的二端口波导的散射参数，提取了等效的介电常数、磁导率和折射率，在所设计的工作频率，折射率接近于0，可以将原本发散的电磁波整理成趋近于覆层面法线方向的近似平面波，起到能量汇聚的功能。

The DNG structure unit is composed of square split ring resonator and strip wire. The modified NRW method is used to extract the equivalent permittivity, permeability, and refractive index from the scattering parameters of the two-port waveguide with DNG structure. At the designed operating frequency, the refractive index approximates zero, which makes the nondirective electromagnetic wave tend to approximate plane wave along the normal direction of the superstrate and congregate the radiation energy.

以方形的SRR环和金属条带构成双负媒质结构单元，使用修正的NRW方法，通过放置双负媒质结构的二端口波导的散射参数，提取了等效的介电常数、磁导率和折射率，在所设计的工作加热板频率，折射率接近于0，可以将原本发散的电磁波整理成趋近于覆层面法线方向的近似平面波，起到能量汇聚的功能。

A new method is described for determining the microwave dielectric properties of solid materials,for example agricultural products,mineral,of known densities from the dielectric properties of pulverized samples measured by employing the short circuited waveguide principle at a few different bulk densities.

本文介绍一个测定不能进行机械加工的&坚实材料&的微波介电特性的新方法。将这类材料研碎，成为&空气－粒子&混合物。应用短路波导方法，在几个不同的混合物&松密度&上测量其介电特性。

A new method is described for determining the microwave dielectric properties of solid materials,for example agricultural products,mineral,of known densities from the dielectric properties of pulverized samples measured by employing the short circuited waveguide principle at a few different bulk densities.

本文介绍一个测定不能进行机械加工的&坚实材料&的微波介电特性的新方法。将这类材料研碎，成为&空气－粒子&混合物。应用短路波导方法，在几个不同的混合物&松密度&上测量其介电特性。当已知待测材料的&坚实密度&时，利用这些测量的特性与混合物&松密度&的线性函数关系进行&外推&，从而获得&坚实密度&下的农产品的微波介电特

The dielectric properties of pulverized agricultural products or mineral samples with known densities are measured by employing the short circuited waveguide method at a few different bulk densities.

将这类材料研碎，成为&空气－粒子&混合物，应用短路波导方法，对几种不同的&松密度&混合物测量其介电特性。

The collimated effect of the waveguide to the atom was also calculated.

我们提出了利用时间轨道势的方法来解决磁波导中磁场的零点问题。

Emphasis is placed on a practical HPM radiating antenna fed by beam waveguide.

该天线工作在X波段时，功率容量大于1 GW，天线增益大于50 dB。

Emphasis is placed on a practical HPM radiating antenna fed by beam waveguide.

通过对波束波导馈电卡塞格仑天线工作原理的分析，论述了波束波导在高功率微波辐射天线中的应用及设计方法，重点介绍了一套利用波束波导馈电高功率微波辐射天线。

"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。