| 垂直极化基本内容 |
| 添加时间：2023/11/16 15:48:23 浏览次数： |
| 垂直极化基本内容 Basic contents of vertical polarization 电波传播时电场矢量的空间描出轨迹为一直线，它始终在一个平面内传播，则称为线极化波。线极化波又有水平极化波和垂直极化波之分。当电场强度方向垂直于地面时，此电波就称为垂直极化波。 When the electric wave propagates, the space trace of electric field vector is a straight line, which always propagates in a plane, which is called linearly polarized wave. Linear polarization wave can be divided into horizontal polarization wave and vertical polarization wave. When the direction of electric field strength is perpendicular to the ground, this wave is called vertical polarization wave. 电波的极化特性取决于发射天馈系统的极化特性。接收天线必须与发射天线具有相同的极化和旋向特性，以实现极化匹配，从而接收全部能量。若部分匹配，则只能接收部分能量。 The polarization characteristics of radio waves depend on the polarization characteristics of the transmitting antenna feeder system. The receiving antenna must have the same polarization and rotation characteristics as the transmitting antenna in order to achieve polarization matching and receive all the energy. If it is partially matched, only part of the energy can be received. 由于电波的特性，决定了水平极化传播的信号在贴近地面时会在大地表面产生极化电流，极化电流因受大地阻抗影响产生热能而使粪池模具 路缘石模具 唐山通风管道 塑钢电缆挂钩 钢纤维 钢制拍门 信号迅速衰减，而垂直极化方式则不易产生极化电流，从而避免了能量的大幅衰减，保证了信号的有效传播。因此，在移动通信系统中，一般均采用垂直极化的传播方式。 Because of the characteristics of the radio wave, the horizontal polarization signal will produce polarization current on the earth surface when it is close to the ground. The polarization current will produce heat energy due to the influence of the earth impedance, which will make the electric field signal attenuate rapidly, while the vertical polarization mode is not easy to generate polarization current, so as to avoid the large attenuation of energy and ensure the effective transmission of the signal. Therefore, in the mobile communication system, the vertical polarization mode is generally used |
| 上一页 射压式造型机 它是利用压缩空气 |
| 下一页 多触头造型机可用于各种铸造车间粘土砂上下箱造型， |
Copyright © 技术支持：遨游网络