Circularly polarized waveguide slot antenna unit and antenna array

[0027] Example one

[0028] Such as Figure 1-Figure 4 As shown, figure 1 Is a perspective view of the circularly polarized waveguide slot antenna unit of the present invention; figure 2 Is the front view of the circularly polarized waveguide slot antenna unit of the present invention; image 3 Is a top view of the circularly polarized waveguide slot antenna unit of the present invention; Figure 4 It is the left view of the circularly polarized waveguide slot antenna unit of the present invention.

[0029] The circularly polarized waveguide slit antenna unit of the present invention includes a first layer structure group, a second layer structure group, a third layer structure group, and a fourth layer structure group distributed from top to bottom, wherein the first layer The structure group includes a number of metal pillars 1, the second layer structure group includes a number of plum-shaped waveguide circular polarizers 2 and a weight-reducing cavity 3 arranged between the waveg

[0042] Example two

[0043] Specifically, the circularly polarized waveguide slit antenna unit is structurally divided into 4 layers, and the entire circularly polarized waveguide slit antenna unit is prepared by layer processing and then welding. The specific processing method is: the metal pillars 1 of the first layer structure group can be processed separately; the waveguide circular polarizer 2 and the weight reduction cavity 3 of the second layer structure group are in this layer The processing of the circular polarizer and the weight-reducing cavity 3 is completed; the slit antenna waveguide 4, the radiation slot 5 and the tuning nail 6 of the third layer structure group are processed and formed in this layer; The T-shaped one-to-two waveguide power divider 7 and the right-angle bent waveguide 8 of the fourth layer structure group are processed in this layer.

[0044] Specifically, the metal post 1 can be installed above the weight reduction cavity 3 by welding, or the mounting

[0049] Example three

[0050] Such as Figure 5 As shown, Figure 5 It is a structural diagram of the circularly polarized waveguide slit antenna array of the present invention; in this embodiment, the circularly polarized waveguide slit antenna array includes three circularly polarized waveguide slit antenna units, adjacent to the circularly polarized The waveguide slit antenna units are arranged at a certain distance from each other in the horizontal direction, so as to realize the random arrangement of the circularly polarized waveguide slit antenna units, which can not only reduce the side lobes of the antenna array, but also cooperate with the one-to-two waveguide power divider 7 can reduce the number of active channels.

[0051] Compared with the conventional feeding method in which the radiation slit is biased due to the staggered elements of the circularly polarized waveguide slit antenna array described in the traditional technology, the radiation slit bias can easily cause t