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天线是影响信号质量的前端关键配套器材,天线的精度非常讲究,不同品牌的天线,优劣差别很大。质差或变形的天线,哪怕天线口径用得很大也无济于事,焦点不知跑到哪里去了,结果调来调去也调不好,这种例子时有所闻。为确保信号品质的优良,原则上选用天线不宜盲目追求小口径,或者迷信大口径,而要重视天线锅面的精度品质,至于天线的口径只要达到所接收信号的接收机门限要求就行。图1是两种天线的外形图。
Antenna is the key supporting front-end supporting signal quality equipment, the antenna accuracy is very particular, different brands of antennas, advantages and disadvantages vary widely. Poor quality or deformation of the antenna, even if the antenna caliber used very much does not help, the focus I do not know where to go, the result transferred to the tune is not good, this example sometimes heard. In order to ensure the excellent signal quality, in principle, it is not advisable to blindly pursue small-diameter antennas or superstitious large-caliber antennas, but should pay attention to the accuracy and quality of the antenna pan surface. As long as the antenna diameter meets the receiver threshold requirement of the received signal, Figure 1 is the appearance of two antennas.