Design technology of horizontal polarization omnidirectional antenna with adjustable lobe elevation angle
An omnidirectional antenna and leveling technology, which is applied to antenna unit combinations with different polarization directions, antenna supports/mounting devices, and structural forms of radiation elements, etc., can solve the problem of non-adjustable antenna pitch beam pointing and antenna impedance matching difficulties, etc. problem, to achieve the effects of simple beam pointing adjustment, reduced matching difficulty, and increased gain
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[0029] Example 1:
[0030] See figure 1 , A horizontally polarized omnidirectional antenna with adjustable lobe elevation angle. The entire antenna includes a top metal reflector 1, an omnidirectional microstrip antenna 2, a PTFE dielectric column 3, and a bottom metal reflector 4. Each medium column is connected by a medium flange 5 in the middle. The omnidirectional microstrip antenna is clamped and fixed between the upper and lower dielectric flanges, and the dielectric column is inserted into the mounting hole of the metal plate and fixed. The upper and lower metal plates have a diameter of 90mm and a thickness of 2mm. A hole 10 with a diameter of 12mm is opened on the lower metal plate for the feed coaxial cable to pass through.
[0031] Such as figure 2 As shown, the omnidirectional microstrip antenna 2 is composed of a dielectric plate 6, four microstrip dipoles 7 and a feed network 8. Four microstrip dipoles are uniformly etched on the circumference of the dielectric p...
Example Embodiment
[0041] Example 2:
[0042] A preferred embodiment of the present invention is an S-band horizontally polarized omnidirectional antenna with an elevation plane pointing to 60 degrees. This antenna is obtained by increasing the diameter of the metal plate under the antenna in Embodiment 1 to 200 mm. The radiation pattern of the elevation plane at the center frequency of 2.85GHz is as follows Picture 12 , It can be seen from the figure that the antenna beam on the elevation plane points to 60 degrees.
Example Embodiment
[0043] Example 3:
[0044] A preferred embodiment of the present invention Figure 13 , Is a binary linear array applied to S-band omnidirectional antenna. This antenna is formed by superimposing two antenna elements in the first embodiment along the axial direction. The two elements can be fed with equal amplitude and in phase to increase the gain on the elevation plane.
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