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要实现高增益定向天线,可以有两种方法: 1.将具有同一主辐射方向的大量单个照射器并联起来(如偶极子、螺旋天线等),并馈入同一相位、同样大小的功率。 2.应用大面积的副照射器,如用由主照射器激励的抛物镜面,使其相位中心处于副照射器的焦点。将单个照射器并联起来的缺点是:需要很多精密加工的零部件,如照射器、馈线、平衡一不平衡变换器、功率分配器等;其单个天线所需的相位一致性在厘米
There are two ways to achieve a high-gain directional antenna: 1. Connect a large number of individual illuminators (eg, dipoles, helical antennas, etc.) with the same main direction of radiation and feed the same phase, the same amount of power. 2. Apply a large area of the sub-illuminator, such as a parabolic mirror excited by the main illuminator, with its phase center at the focus of the sub-illuminator. The disadvantage of paralleling a single illuminator is the need for many precision machined components such as illuminators, feeders, baluns, power dividers, etc .; the phase consistency required for a single antenna is in the centimeter