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本文研究了一种 H 面扇形余割平方波束喇叭天线。它是在 H 面扇形喇叭天线内插入介质,按照几何光学原理把天线开口面设计成非平面开口形状。该天线可以使 E 面口径长度变化,因而能很容易地改变 E 面的方向性。文中试制了9种使 H 面和 E 面口径长度变化的天线,讨论了两种口径长度的方向图及其各种特性的变化。结果,在口径角为60°,H 面口径长度为10λ左右时,得到了特性好的宽带小型 H 面余割波束喇叭天线,通过使 E 面口径长度变化,能够改变 E 面方向图,而不影响 H 面的余割特性。本实验中,通过各参数的设定,可以使 E 面半功率点宽度在44°～72°范围内变化。因此,能很容易地根据覆盖范围的大小设计天线,它可广泛应用于超高频广播发射和多路通信。其次,它与 E面余割波束喇叭天线共同使用,能够使用临近区域的水平和垂直极化波,有助于频率的有效利用。
In this paper, we study a H-face fan-shaped cosine square beam horn antenna. It is inserted in the H-sector fan horn media, in accordance with the principle of geometrical optics antenna opening design non-planar opening shape. The antenna can change the length of the E-surface caliber so that the directivity of the E-surface can be easily changed. In this paper, nine kinds of antennas that make the diameter of H-plane and E-plane change are trial-manufactured. The patterns of the two aperture lengths and the changes of their characteristics are discussed. As a result, when the aperture angle is 60 ° and the length of the H-plane aperture is about 10λ, a broadband small H-plane cant beam horn antenna with good characteristics is obtained. By changing the E-plane aperture length, the E-plane orientation can be changed without Affect the H-cut characteristics. In this experiment, through the setting of each parameter, the E-plane half-power point width can be changed within the range of 44 ° ~ 72 °. Therefore, it is easy to design an antenna based on the size of the coverage area, which can be widely used for transmitting UHF radio and multiplexing. Second, it works with the E-Beam Beam Horn antenna, which enables the use of horizontal and vertical polarized waves in the immediate area, contributing to efficient frequency utilization.