查询词典 antenna

By analyzing the case linearly-polarized beacon signal and elliptically-polarized radar antenna, the related formulas and curves are given.

通过对线极化目标信号和椭圆极化雷达天线匹配情况的分析和计算，获得了有关的公式和曲线。

In Chapter 4, two new types of built-in PIFA are proposed to alleviate the absorption of human body and to improve the radiation efficiency of the antenna. In one new type of PIFA, a parasitic conducting plate parallel to the ground plane is added to the original PIFA, and in the other type, a λ/4 short plate is connected to the ground plane.

第四章为了减轻携带机内藏PIFA对人体的辐射，提高天线的发射效率，首先用FDTD数值法研究了不同的馈电结构对人体近旁的天线发射效率的影响，从而在此基础上提出了两种新型的PIFA结构来减轻人体的吸收，以达到提高天线发射效率的目的。

Several such tapered slot antennas were arranged radially to form a circle, and a group of PINs was put at their feed lines. With the proper sequence switch of PINs, these tapered slot antennas can be constructed into an equivalent omnidirectional antenna.

将几个这样的渐变缝隙天线以放射状构成一圈，并在它们的馈线上引入一组PIN开关，以适当的时序控制PIN开关依次切换，可构成一种等效的全向天线。

Transmitter, antenna and sending set are all in one , convenient for outside work.

传感器、天线与发射机一体化，便于野外作业

The signal frequency received by the antenna is very high, normally it can exceed one GHz. Usually the sample card can not collect so high frequency signal, and it is not necessary to collect the total signal because what we need is the peak value of the signal, and then to know the severe degree of the PD of Transformer relatively .

天线接收的超高频信号频率很高，可达到上G，要采集此信号对采集卡要求太高，而且完整地采集如此高频的信号意义也不大，我们需要的是超高频信号的峰值特征，从而了解变压器内部局部放电的相对严重程度。

One of Dr Dickey's rubber-coated antennas, though, can be tuned by stretching the antenna itself.

Dickey博士的橡胶外壳的天线，可以通过伸展天线本身来调谐。

My antenna is on the roof about thirty meters high from the ground.

我的天线在屋顶上离地面30米高。

My antenna is on the roof about thirty meters high from the ground.

我的天线在屋顶上离地面30m高。

My antenna is a DP which is on the roof about eight meters high.

我使用偶极天线，安装在楼顶，高度为8米。

I am using a four bands Inverted-V antenna which is on the roof about seven meters high.

今天重庆天气很好，气温大约是25摄氏度。

More direct, directer ; most direct, directest

径直的，笔直的

Do you know how to use a chain saw?

你知道如何使用链锯吗？