An Axial Mode Helical Antenna with Excellent Axial Ratio Performance
A technology of helical antenna and helical wire, which is applied in the direction of antenna, antenna support/mounting device, electrical components, etc., can solve the problems of limiting the improvement of the axial ratio characteristic of the helical antenna, affecting the performance of the antenna, and affecting the performance of the feed array, etc., to achieve Better axial ratio characteristics, improved axial ratio characteristics, and improved symmetry
Active Publication Date: 2015-09-23
XIAN INSTITUE OF SPACE RADIO TECH
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Problems solved by technology
The axial ratio performance diameter of the helical antenna affects the performance of the feed array, which in turn affects the performance of the entire antenna. If the axial ratio performance of the helical antenna is poor or critical, the C / I performance of the entire multi-beam antenna will be seriously affected
[0003] The axial ratio performance of the classically designed helical antenna can be optimized by increasing the number of turns of the helix, properly selecting the pitch and the helix rise angle, but using these measures to improve the axial ratio characteristics of the helical antenna has reached the limit, especially the feed array to the helical There are strict requirements on the height of the antenna, which further limits the improvement of the axial ratio characteristics of the helical antenna
At present, the helical antenna with classic design can no longer meet the needs of high-performance multi-beam antenna
Method used
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Embodiment 1
[0030] The inner diameter of the radiation cup 1 is 0.9λ, and the height is 0.317λ; the number of the triangular grooves 11 is 6, the triangular opening angle is 97.2°, and the depth is 0.13λ; the inner diameter of the axially symmetrical metal ring 12 is 0.53λ, the difference between the inner diameter and the diameter of the first helix is 0.236λ, and the height is equal to the distance from the starting position of the first helix to the radiation cup 1 The height of the inner bottom surface and the distance from the starting position of the second helix to the radiation cup 1 Half of the sum of the heights of the inner bottom surfaces is 0.097λ.
[0031] The axial ratio pattern of the helical antenna obtained from the final test is as follows image 3 as shown, Figure 4 Axial ratio test pattern for classically designed helical antennas. It can be seen from the comparison that the axial ratio of the axial mode helical antenna of the present invention is less than 1dB w...
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The invention relates to an axial mould spiral antenna with excellent axial ratio property. The axial mould spiral antenna comprises an radiation cup body, a spiral line, a spiral line support tower and a TNC (Terminal Network Controller) connector, wherein the TNC connector is fixed in the center of the outer bottom surface of the radiation cup body; the spiral line support tower is fixed in the center of the inner bottom surface of the radiation cup body; the spiral line is wound on the spiral line support tower, and the spiral line and the TNC connector are connected through welding; the radiation cup body is in a cylinder shape; a plurality of axial ratio widening triangular grooves are uniformly distributed on the edge of the radiation cup body; an axial ratio symmetrical metal ring is arranged on the inner bottom surface of the radiation cup body; the circle center of the axial ratio symmetrical metal ring is coincided with the circle center of the inner bottom surface of the radiation cup body. The axial mould spiral antenna disclosed by the invention greatly enhances the axial ratio level of a spiral antenna in a large irradiation opening angle and effectively improves the symmetry of an axial ratio directional diagram.
Description
technical field [0001] The invention relates to an axial mode helical antenna, in particular to an axial mode helical antenna with excellent axial ratio performance. Background technique [0002] The feed array of a large expandable multi-beam antenna consists of dozens or even hundreds of array elements. Due to the large number of array elements, there are strict requirements on the weight of the array elements. The axial mode helical antenna is widely used in In the feed array of a multi-beam antenna. The axial ratio performance diameter of the helical antenna affects the performance of the feed array, which in turn affects the performance of the entire antenna. If the axial ratio performance of the helical antenna is poor or critical, the C / I performance of the entire multi-beam antenna will be seriously affected. [0003] The axial ratio performance of the classically designed helical antenna can be optimized by increasing the number of turns of the helix, properly sele...
Claims
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IPC IPC(8): H01Q1/14H01Q19/02
Inventor吕庆立崔兆云李荣军王勇
OwnerXIAN INSTITUE OF SPACE RADIO TECH