Electrical downtilt through beam-steering versus mechanical downtilt (base station antennas)
Electrical downtilt through beam-steering versus mechanical downtilt (base station antennas)
复制标题
通过波束控制实现的电气下倾与机械下倾（基站天线）
DOI：
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发表时间：
1992
期刊：
影响因子：
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通讯作者：
G. Wilson
中科院分区：
文献类型：
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作者：
G. Wilson
在移动通信系统中经常进行下倾基站天线，以防止对其他小区站点的干扰并在高仰角天线站点下方获得更好的覆盖范围。在许多情况下，下倾可以作为同信道干扰的解决方案。随着使用量的增加，下倾基站天线可能会变得更加普遍。对于全向天线，通常最好使用电下倾。对于定向天线，经常使用机械下倾。当需要灵活地改变下倾角时，使用机械倾斜。电气倾斜通常在制造时固定在设定角度。现在，随着具有可调节电倾角的天线的推出，这种情况正在发生变化。正常的基站天线可能会因倾斜而损失大约 1 dB 的增益。<<ETX>>
Downtilting base station antennas is frequently done in mobile communications systems to prevent interference to other cell sites and to attain better coverage below a high-elevation antenna site. The downtilt can be a solution for cochannel interference in many situations. As use increases, downtilting base station antennas could become even more common. For omnidirectional antennas, it is usually best to use electrical downtilt. For directional antennas, mechanical downtilt is often used. Mechanical tilt is used when flexibility in changing the downtilt is desired. The electrical tilt is usually fixed at a set angle at the time of manufacture. This is changing now that antennas with adjustable electrical tilt are being introduced. A normal base station antenna may lose approximately 1 dB of gain from tilt.<<ETX>>