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②偏馈式抛物面天线如图5所示。图5偏馈式抛物面天线示图(2)偏馈式抛物面天线与前、后馈抛物面天线相比有以下优点:①它能有效地降低口面遮挡的影响,使旁瓣电平比前、后馈两者的都低得多,使天线噪声电平明显降低;②从馈源发出的电波仅一小部分返回馈源,因而反射波不会影响偏置天线,尤其是其阻抗,几乎不受反射波影响。因此可获得较佳的驻波系数;③当采用较大的fid设计时,不会影响天线结构
② partial feed parabolic antenna shown in Figure 5. Figure 5 Partial Parabolic Antenna (2) Partial Parabolic Antenna Compared with the front and rear parabolic antennas, it has the following advantages: ① It can effectively reduce the influence of the mouth occlusion, Both feed back are much lower, so that the antenna noise level is significantly reduced; ② only a small part of the return waves from the feed back to the feed, so the reflected wave will not affect the bias antenna, especially its impedance, almost Affected by the reflected wave. So you can get a better standing wave coefficient; ③ When using a larger fid design, will not affect the antenna structure