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本文主要介绍极化分集电平的某些测量结果,这些结果是在我国华北860KM的短波电路上,用比较极化分集方式与单极方式测得的电平方法获得的。根据265对电平测试数据,我们能够得出下面结论: 1.极化分集方式工作时,信号电平比不分集方式至少高2.4dB。 2.极化分集最适宜于在工作频率比较低的南北走向电路使用,它是克服极化衰落提高通信质量的方法之一,具有占地面积少和机动性大的比点,所以尤其当天线架设场地受限(例如,在船上和市区)时,这种分集方式更加可取。
This paper introduces some of the polarization diversity level measurement results, these results are in our country North China 860KM shortwave circuit, using the polarization method to compare the polarization and monopole method to obtain the level of the method. According to 265 pairs of level test data, we can draw the following conclusions: 1. Polarization diversity mode of work, the signal level than the non-diversity mode of at least 2.4dB higher. 2. Polarization diversity is most suitable for the use of north and south direction circuits with relatively low operating frequency. It is one of the methods to overcome the polarization fading and improve the communication quality. It has the advantages of less occupied area and more mobility, especially when the antenna This type of diversity is more desirable when there is limited site space (for example, on board and in urban areas).