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文章通过使用ITU-R P.533建议中的“高频传播预测方法”计算了一型高仰角天线近距离的场强和信噪比覆盖情况,并对与短波鞭天线近距离通信的覆盖情况进行了对比。计算结果及分析表明,短波近距离通信时,鞭天线的通信效能总体上要优于高仰角天线,但是鞭天线存在近区通信盲区;高仰角天线的场强覆盖和信噪比覆盖要比鞭天线差,但是不存在近区通信盲区。通过对鞭天线和高仰角天线的建模分析得出的两型天线的效率和增益图表显示,鞭天线在低频段的增益和效率都优于高仰角天线,在盲区以外,鞭天线的场强覆盖和信噪比覆盖要优于高仰角天线。
The article calculates the field strength and signal-to-noise ratio coverage of a type of high-elevation antenna by using the “high-frequency propagation prediction method” in Recommendation ITU-R P.533 and analyzes the short-range whip antenna The coverage is compared. The calculation results and analysis show that the communication performance of whip antenna is better than that of high-elevation antenna in short-wave short-range communication, but the whip antenna has blind zone in near-field communication. Field coverage and signal-to-noise ratio The antenna is poor, but there is no blind spot for near-field communication. The efficiency and gain of the two types of antennas obtained from the modeling analysis of the whip antenna and the high-elevation antenna show that the gain and efficiency of the whip antenna are better than the high-elevation antenna in the low-frequency range. Outside the blind area, the field strength of the whip antenna Coverage and signal to noise ratio coverage is better than high elevation antenna.