水平极化移动接收天线的研究与设计

Research and design of horizontal-polarized mobile receiving antenna

在移动通信领域 ,移动接收采用垂直极化方式 ,因此移动接收天线可以采用垂直极化方式的偶极子天线。由于垂直极化天线在水平方向的方向图是全向的 ,因此可以在相对于发射天线的任何方向上都不改变接收天线的方向性。随着数字电视时代的到来 ,电视的移动接收成为数字电视的一项重要特征。但是在以往的模拟电视广播中 ,电视广播信号通常是水平极化的 ,因此在数字电视的移动接收时 ,或者需要改变信号发射的极化方式 ,或者设计一种新的可以用于移动接收目的的接收天线。本文给出一种可以用于接收水平极化信号的移动接收天线的设计方案和理论分析。通过理论分析表明 。

In the domain of mobile telecommunication, we use vertical polarized dipole aerial as receiving antenna for its azimuth pattern antenna is at all angles in the horizontal plane and we needn't make changes in any direction of receiving antenna relative to transmitting antenna. During analog TV period, signals are usually horizontal polarized. However, with the coming era of digital TV, mobile reception of TV signals become so dominant that we have to either change the polarization mode of transmission or design a new type of receiving antenna. The paper introduce an antenna adaptive to the mobile reception of horizontal-polarized signals and prove its feasibility by theoretical analysis.