查询词典 antenna array

The design method of a photoinduced plasma Fresnel zone plate antenna is described.

本文描述一种光生等离子体菲涅尔波带板天线的设计方法。

Therefore, it is good when the feed phase center is on the front edge or directly in front of the antenna structure.

为此，馈源相位中心最好在前沿，或直接在天线结构的前面。

Momentum is a Full-Wave Method of Moments simulator intended to be used for RF and Microwave component, circuit and planar antenna analysis.

Momentum是一种基于全波法的力矩模拟器，用于RF，微波组件，电路和平面天线的分析。

Firstly, Hallen integral equation was performed to analyze the antenna. Then, the Equivalent Theory was used to build the electric field integral equation, the EFIE was translated into matrix equations by Galerkin method, and the scattering field can be calculated by the surface currents of the metal target. Finally, numerical calculation to representative scatters was conducted.

首先推导了有耗媒质中圆柱对称天线的海伦积分方程；然后利用等效原理建立导体表面的电流积分方程，并采用伽略金方法将积分方程组转化为矩阵方程组，求解出散射体表面的等效电流分布，计算出其散射场；最后以典型散射体为例，进行了仿真计算分析。

The general electric field integral equation presented can be applied to any wire antenna by defining the appropriate unit vector,?

通过定义适当的单位矢量l？

The first step in developing the solution for the currents is to driven the appropriate electric field integral equation for general structures and the basics of the method of moments, which were then applied to a straight wire antenna.

计算电流解的第一步在于推导出适当的电场积分方程。

However, the change of geometry on this geometrically symmetrical reflector carried the danger of loosing some of the basic characteristics of geometric optics, by whose principles this antenna functions.

无论如何，这个对称几何反射器形体的改变，可能会带来这个天线赖以运作的基本几何特性不稳定的危险。这也就意味着完全改变了天线的大部分实质性的宝贵的特性。

The addition of RAM on the antenna back plate, and around the support arm and gimbal, would provide a further improvement.

在天线支承板的上面并且在支架臂和万向接头的周围的RAM的加入，将会提供一个更进一步的改善。

Its political antenna becomes more and more globalist just like its economicalantenna, transcending boundaries between countries and limited regional boundaries.

它不仅体现在政治和外交领域，而且体现于军事领域，即新干涉主义的甚嚣尘上。

In the afternoon of September 6, 1976, with only 30 seconds of fuel remaining, a MiG-25 broke through the clouds above Hakodate, Japan, narrowly avoided a departing Japanese airliner, and dove down to the city's commercial airport where, in front of hundreds of amazed Japanese motorists, it landed screeching, skidding, blowing a tire, plowing 800 feet off the runway, and finally stopping a few feet from a large antenna.

1976年9月6日下午，一架米格25飞机划破了日本Hakodate的天空。带着仅剩的30秒燃料，在惊险地避开一架刚起飞的日本客机后，这架米格飞机鸽子般降落在这座城市的商业机场上，就当着数百惊讶的日本乘客，带着急刹车的尖叫声冲出跑道，暴掉一个胎又梨开几百英尺的地，才最终在离一个巨大天线几英尺远的地方停下。苏联飞行员维克多。

"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。