Short backfire antenna capable of reducing wind resistance

Abstract

The utility model relates to a short backfire antenna capable of reducing wind resistance, which comprises a main reflector [1], an auxiliary reflector [2] and a feed oscillator [3], the main reflector [1] is a concave circular surface, the outer circumference of the main reflector [1] is provided with a side ring with a certain height, the circular surface is uniformly provided with a plurality of holes, the middle part of the circular surface of the main reflector [1] is provided with a through hole, and the feed oscillator [3] is arranged in the through hole. The auxiliary reflector (2) and the feed oscillator (3) are sealed in a cylindrical cavity connected with the through hole, the auxiliary reflector (2) is a circular reflecting surface, the feed oscillator (3) is a feed source of the short backfire antenna, and the feed oscillator (3) is arranged in the cylindrical cavity and is separated from the auxiliary reflector (2) by a certain distance. According to the short backfire antenna capable of reducing the wind resistance, the shape surface of the main reflector is modified, the environmental adaptability is enhanced, the antenna can adapt to a larger wind and sand environment, the weight of equipment is reduced through punching, and the portability of the equipment is improved.

Description

Technical Field

[0001] This utility model belongs to the field of missile-borne telemetry and control, and relates to a short back-firing antenna structure that can reduce wind resistance. Background Technology

[0002] In S-band small ground telemetry stations, short backfire antennas are widely used due to their simple structure, compact size, high antenna gain, and low cost. In recent years, with the rapid development of telemetry projects in China and a significant increase in field test projects, the demand for telemetry antennas has been growing. Larger antennas are detrimental to the portability of field tests, and windy and sandy weather is a serious concern during these tests. The conical main reflector shape and side rings of short backfire antennas mean that weather conditions can affect the stability of the antenna arrangement during field tests, negatively impacting signal reception. Summary of the Invention

[0003] The purpose of this utility model is:

[0004] To address the aforementioned problems, this invention proposes a short backfire antenna design that reduces wind resistance, based on the technical characteristics of short backfire antennas and the actual needs of field testing. This design reduces wind resistance and weight by creating evenly distributed circular holes on a parabolic surface, without affecting its functionality or performance. This device is invented to ensure the stability of the short backfire antenna arrangement when ground-based telemetry equipment receives telemetry signals from the product during field testing, thus preventing environmental factors such as wind and sand from affecting telemetry data reception.

[0005] The technical solution of this utility model:

[0006] A short backfire antenna that can reduce wind resistance consists of a main reflector [1], a sub-reflector [2], and a feed element [3]. The main reflector [1] is a concave circular surface with a certain height of edge ring on the outer circumference. Multiple openings are evenly distributed on the circular surface. The main reflector [1] has a through hole in the middle of the circular surface. The sub-reflector [2] and the feed element [3] are both enclosed in a cylindrical cavity connected by the through hole. The sub-reflector [2] is a circular reflecting surface. The feed element [3] is the feed source of the short backfire antenna and is located in the cylindrical cavity and is separated from the sub-reflector [2] by a certain distance.

[0007] Its characteristic is that multiple openings are evenly distributed on the concave circular surface of the main reflector [1], and each opening radiates radially outward from the center of the concave circular surface of the main reflector [1].

[0008] The feature is that the diameter of each opening on the concave circular surface of the main reflector [1] is 1cm, and the distance between the centers of each opening in each group of radial openings is 3cm.

[0009] Its characteristic feature is that the diameter of the concave circular surface of the main reflector is 40cm.

[0010] The feature is that the upper ring of the main reflector [1] is set perpendicular to the sub-reflector [2].

[0011] Its characteristic is that the signal strength of the short backfire antenna is ≥40dBi and the signal-to-noise ratio is ≥15dBi.

[0012] The beneficial effects of this utility model are:

[0013] The present invention provides a short back-fired antenna that can reduce wind resistance, which has the following technical advantages:

[0014] 1) The shape of the main reflector has been modified, enhancing its environmental adaptability and enabling it to adapt to larger wind and sand environments.

[0015] 2) By drilling holes, the weight of the equipment is reduced, and its portability is increased. Attached Figure Description

[0016] Figure 1 Side view of short backfire antenna

[0017] Figure 2 Front view of short backfire antenna Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings:

[0019] like Figure 1 As shown, the backfire antenna of this embodiment that can reduce wind resistance consists of a main reflector [1], a sub-reflector [2], and a feed element [3]. The main reflector [1] is a concave circular surface with a certain height of edge ring on the outer circumference. Multiple openings are evenly distributed on the circular surface. The main reflector [1] has a through hole in the middle of the circular surface. The sub-reflector [2] and the feed element [3] are both enclosed in a cylindrical cavity connected by the through hole. The sub-reflector [2] is a circular reflecting surface. The feed element [3] is the feed source of the short backfire antenna and is located in the cylindrical cavity and is separated from the sub-reflector [2] by a certain distance.

[0020] The diameter of the main reflector surface is 40cm. Multiple openings are evenly distributed on the concave circular surface of the main reflector [1]. Each opening radiates radially outward from the center of the concave circular surface of the main reflector [1]. The diameter of each opening on the concave circular surface of the main reflector [1] is 1cm, and the distance between the centers of each opening in each group of radial openings is 3cm. Figure 2 As shown.

[0021] During operation, the radiation field emitted into space by the short backfire antenna mainly consists of four parts. The first path is the wave radiated directly from the feed to the main reflector, which then travels through the main reflector into the external space. The second path is the wave radiated from the feed to the sub-reflector, which is reflected back to the main reflector and then travels into the external space. The third path is the wave radiated from the feed being intercepted by the edge ring surrounding the main reflector and then traveling into the external space. The fourth path is the diffracted wave generated by the edge of the sub-reflector from the wave emitted by the feed.

[0022] The improved short backfire antenna has a signal strength of ≥40dBi and a signal-to-noise ratio of ≥15dBi. Actual testing showed that its performance was not affected, and it also reduced the weight of the equipment and lowered wind resistance.

Claims

1. A short backfire antenna with reduced wind resistance, comprising a main reflector [1], a sub-reflector [2], and a feed element [3], characterized in that, The main reflector [1] is a concave circular surface with a certain height of edge ring on the outer circumference. Multiple openings are evenly distributed on the circular surface. The main reflector [1] has a through hole in the middle of the circular surface. The sub-reflector [2] and the feed element [3] are both enclosed in a cylindrical cavity connected by the through hole. The sub-reflector [2] is a circular reflecting surface. The feed element [3] is the feed source of the short backfire antenna. It is located in the cylindrical cavity and is separated from the sub-reflector [2] by a certain distance.

2. The short backfire antenna with reduced wind resistance as described in claim 1, characterized in that, Multiple openings are evenly distributed on the concave circular surface of the main reflector [1]. Each opening radiates outward radially from the center of the concave circular surface of the main reflector [1].

3. A short backfire antenna with reduced wind resistance as described in claim 2, characterized in that, The diameter of each opening on the concave circular surface of the main reflector [1] is 1 cm, and the distance between the centers of each opening in each group of radial openings is 3 cm.

4. A short backfire antenna with reduced wind resistance as described in claim 3, characterized in that, The diameter of the concave circular surface of the main reflector is 40cm.

5. A short backfire antenna with reduced wind resistance as described in claim 4, characterized in that, The upper ring of the main reflector [1] is set perpendicular to the sub-reflector [2].

6. A short backfire antenna with reduced wind resistance as described in claim 5, characterized in that, The signal strength of the short backfire antenna is ≥40dBi and the signal-to-noise ratio is ≥15dBi.

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