Double-reflector antenna with integrated structure and function

Abstract

The invention discloses a double-reflector antenna with an integrated structure and function. The double-reflector antenna comprises a main reflector, an auxiliary reflector, a feed network and a supporting structure. The main reflector serves as a bearing bridge between the upper detector and the lower detector to improve the torsional mode of the whole detector and is composed of a front skin, a rear skin, an aluminum honeycomb and an embedded part arc-shaped rod set of the aluminum honeycomb, and the arc-shaped rod set is integrally embedded when the main reflector is cemented and formed. The auxiliary reflector, the feed network and the supporting structure are arranged on the concave surface side of the main reflector according to the geometrical relationship of the standard Cassegrain type double-reflector antenna, so that the functions of information transmission and the like are ensured; the supporting structure adopts three same V-shaped supporting rods which are connected with the main reflector and the auxiliary reflector to form a stable and reliable triangular structure in a space, so that the layout design of the auxiliary reflector in a smaller space is realized, more space is reserved for the design of a detector above the concave surface of the main reflector, and the stability of the detector is improved. And the requirement of the auxiliary reflector on the supporting rigidity is ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of dual-reflection surface antennas, and in particular relates to a dual-reflection surface antenna with integrated structure and function. Background Art

[0002] As the exploration of Mars continues to deepen, the design requirements for antennas are becoming increasingly higher, especially designing antennas that match the probe in a limited space, and the antennas must have the ability to carry large mass.

[0003] When designing a traditional dual-reflector antenna, the antenna structure is optimized only on the premise of ensuring the antenna function, without considering using it as a bearing structure to adapt to the detector layout. Summary of the invention

[0004] To solve the above problems, the present invention proposes a dual-reflector antenna with integrated structure and function, in which the main reflector of the dual-reflector antenna is used as a bearing bridge between the upper and lower detectors to improve the torsional mode of the entire detector.

[0005] The technical solution provided by the present invention is: a dual-reflector antenna with integrated structure and function, comprising: a main reflector, a sub-reflector, a feeding network, and a supporting structure, wherein the main reflector is composed of a front skin, a rear skin, an aluminum honeycomb and an embedded arc rod group thereof, and the arc rod group is integrally embedded when the main reflector is glued and formed; the sub-reflector, the feeding network, and the supporting structure are arranged on the concave side of the main reflector according to the geometric relationship of the standard Cassegrain dual-reflector antenna to ensure functions such as information transmission; the supporting structure adopts three identical V-shaped supporting rods, which form a stable and reliable triangular structure in space after being connected with the main and sub-reflectors.

[0006] Preferably, the support structure is composed of three identical V-shaped support rods, the support structure is an equilateral triangle in the projection direction of the main reflector, and the connection points with the main reflector are all located at the vertices of the equilateral triangle, and the connection points with the sub-reflector are all located at the midpoints of the three sides of the equilateral triangle.

[0007] Preferably, the arc rod group includes 4 positioning joints and 4 stabilizing joints, the 4 positioning joints and the 4 stabilizing joints are equidistantly staggered on an arc with the center point of the main reflector as the center, the 4 positioning joints and the 4 stabilizing joints are connected in sequence through 8 carbon fiber arc rods so that the orthographic projection shape is a regular octagon, and the 4 positioning joints are connected in sequence through 4 carbon fiber arc rods so that the orthographic projection shape is a square.

[0008] Preferably, the arc rod group also includes four auxiliary joints, and the four auxiliary joints are respectively located on the extended arcs from the center point of the main reflector to the four positioning joints, each of the auxiliary joints is connected to the two adjacent stabilizing joints through two carbon fiber arc rods of equal length, and each of the auxiliary joints is connected to the corresponding positioning joint through one carbon fiber arc rod.

[0009] Preferably, the surface equation formed by the arc rod group is consistent with the surface equation of the main reflector, and the positioning joint, stabilizing joint, auxiliary joint and carbon fiber arc rods are all fixed by gluing + riveting.

[0010] Preferably, the positioning joint is made of metal, and the stabilizing joint and the auxiliary joint are made of non-metallic material. The positioning joint is connected to the upper detector at the concave surface of the main reflector and to the lower detector at the convex surface of the main reflector; the stabilizing joint is connected to the lower detector at the convex surface of the main reflector.

[0011] Preferably, when the arc-shaped rod group is embedded, the concave surface of the arc-shaped rod group is firstly bonded to the convex surface of the front skin of the main reflector; secondly, the aluminum honeycomb is bonded to the part of the front skin convex surface other than the arc-shaped rod group; then, the concave surface of the rear skin of the main reflector is bonded to the convex surface of the arc-shaped rod group and the aluminum honeycomb, and finally, the whole is pressurized and cured to form the main reflector. Due to the adoption of the above technical solution, the present invention has the following advantages and positive effects compared with the prior art:

[0012] 1. The main reflector of the present invention is pre-buried with an arc-shaped rod group, which not only enables the main reflector to have the structural characteristics of carrying a large detector, but also the antenna function is not affected after the detector is actively separated above the concave surface of the main reflector.

[0013] 2. The main reflector of the present invention has a pre-embedded arc rod group, which improves the torsional stiffness of the main reflector in the circumferential direction, thereby improving the torsional mode of the overall detector.

[0014] 3. The support structure composed of three identical V-shaped support rods realizes the layout design of the sub-reflector in a smaller space, and reserves more space for the design of the detector above the concave surface of the main reflector; at the same time, its stability and reliability ensure the support rigidity requirements of the sub-reflector. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein:

[0016] Figure 1 It is an overall structural diagram of a dual-reflector antenna with integrated structure and function in an embodiment of the present invention;

[0017] Figure 2An exploded view of various components of the main reflector in an embodiment of the present invention;

[0018] Figure 3 This is a structural diagram of an arc rod group embedded in the main reflector in an embodiment of the present invention;

[0019] Figure 4 is an overall structural diagram of an arc rod group in an embodiment of the present invention;

[0020] Figure 5 It is a structural diagram of the dual-reflector antenna with integrated structure and function in an embodiment of the present invention, which is respectively connected to the upper and lower detectors;

[0021] Figure 6 This is a state diagram of the upper detector and the structural and functional integrated dual reflector antenna when they are separated in an embodiment of the present invention;

[0022] Figure 7 is an overall structural diagram of a supporting structure and a sub-reflector in an embodiment of the present invention;

[0023] Figure 8 It is a projection view of the supporting structure and the sub-reflector in the direction of the main reflector in an embodiment of the present invention;

[0024] Fig. 9 1 is an overall structural diagram of a V-shaped support rod in an embodiment of the present invention.

[0025] Description of reference numerals:

[0026] 1-main reflector; 2-arc rod group; 3-positioning joint; 4-stabilizing joint; 5-auxiliary joint; 6-arc rod; 7-support structure; 8-"V" type support rod; 9-sub-reflector; 10-feeding network; 11-carbon fiber support rod; 12-fixed joint; 13-main reflector front skin; 14-main reflector rear skin; 15-aluminum honeycomb; 16-upper detector; 17-lower detector. DETAILED DESCRIPTION

[0027] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description and claims. It should be noted that the drawings are all in a very simplified form and use non-precise ratios, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0028] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0029] Example

[0030] The present invention proposes a dual-reflector antenna with integrated structure and function, comprising a main reflector 1, an arc-shaped rod group 2, a supporting structure 7, a sub-reflector 8, and a feeding network 10;

[0031] The arc rod group 2 is composed of a positioning joint 3, a stabilizing joint 4, an auxiliary joint 5, and a carbon fiber arc rod 6 which are bonded and riveted together;

[0032] The support structure 7 is composed of 3 identical "V"-shaped support rods 8.

[0033] Combination Figure 2 and Figure 3 After the arc rod group 2 is formed, it is embedded in the main reflector 1 as a whole. The embedding time is when the main reflector 1 is glued and formed. During the embedding, the positional relationship and accuracy of the two are ensured by the mold and the positioning tooling.

[0034] Specifically, when the arc rod group 2 is pre-embedded, first, the concave surface of the arc rod group 2 and the convex surface of the front skin 13 of the main reflector are bonded by adhesive film. If there is a gap at the fitting surface of the two, it can be filled with T300 carbon fiber woven cloth; secondly, the other parts of the convex surface of the front skin 13 of the main reflector (the part outside the arc rod group) are bonded to the aluminum honeycomb 15 by adhesive film; then, the concave surface of the rear skin of the main reflector 1 is also bonded to the convex surface of the arc rod group 2 and the aluminum honeycomb 15 by adhesive film, and finally the above-mentioned whole is pressurized and cured to form the main reflector 1.

[0035] Meanwhile, during the embedding process, the contact portion between the aluminum honeycomb 15 and the arc rod group 2 may be filled with a proper amount of foam glue.

[0036] Combination Figure 4 The arc rod group 2 adopts a "four-pointed star" mesh structure, and the surface equation of the arc rod group 2 is consistent with the surface equation of the main reflector 1;

[0037] Specifically, the four positioning joints 3 and the four stabilizing joints 4 are staggered and equidistantly distributed in the annular direction of the main reflector 1;

[0038] Specifically, the annular diameter is φ1850mm;

[0039] At the same time, the four positioning joints 3 and the four stabilizing joints 4 are connected by eight identical carbon fiber arc rods 6 to form a regular octagonal structure, so as to improve the circumferential torsion mode of the main reflector 1;

[0040] Furthermore, the four positioning joints 3 are connected in sequence through four carbon fiber arc rods 6 to form a regular quadrilateral structure, and are located inside the regular octagon, further improving the rigidity of the regular octagon;

[0041] Furthermore, the four stabilizing joints 4 are connected in sequence through eight carbon fiber arc rods 6 via four auxiliary joints 5 to form a four-pointed star structure;

[0042] The auxiliary joints 5 are all located at the vertices of the four-pointed star, and in the projection direction of the main reflector 1, they are all located on the extended arc from the center point of the main reflector 1 to the four positioning joints 3;

[0043] Furthermore, the auxiliary joint 5 is connected to the corresponding positioning joint 3 through the carbon fiber arc rod 6, which further ensures the overall rigidity of the arc rod group 2 and the main reflector 1; Figure 1 , Figure 5 , Figure 6 and Figure 8 , the four positioning joints 3 are connected to the upper detector 16 on the concave surface of the main reflector 1, and are connected to the lower detector 17 on the convex surface of the main reflector 1, serving as a rigid "bridge" between the upper and lower detectors 17 to ensure the connection rigidity of the upper and lower detectors; at the same time, the four stabilizing joints 4 are connected to the lower detector 17 on the convex surface of the main reflector 1, thereby ensuring the connection rigidity of the entire detector; before and after the upper detector 16 is actively separated, the antenna starts to work normally;

[0044] Specifically, the positioning joint 3 is made of titanium alloy or other metal materials, and the stabilizing joint 4 and the auxiliary joint 5 are both made of non-metallic materials such as carbon fiber, thereby reducing the mass of the entire detector while ensuring the connection rigidity.

[0045] Combination Figure 7 and Figure 8 The support structure 7 adopts a "three-point six-rod" structure. The support structure 7 is an equilateral triangle in the projection direction of the main reflector 1, and the connection points with the main reflector 1 are all located at the vertices of the equilateral triangle, and the connection points with the sub-reflector 9 are all located at the midpoints of the three sides of the equilateral triangle. On the one hand, the stability and reliability of the support structure are improved, and on the other hand, the concave surface of the main reflector 1 has more sufficient space, which is convenient for the design and layout of the upper detector 16;

[0046] Specifically, combined Fig. 9 The "V"-shaped support rod 8 is composed of two carbon fiber rods 11 and a fixed joint 12;

[0047] One end of the carbon fiber rod 11 is fixed to the fixed joint 12 by bonding and riveting, and the other end is fixed to the sub-reflector 9 by screwing;

[0048] Furthermore, combined with Figure 1The sub-reflector 9 is screwed and fixed to the concave central axis of the main reflector 1 through the supporting structure 7, and the focus on one side of the sub-reflector 9 coincides with the focus of the main reflector 1, and the focus on the other side coincides with the phase center of the feeding network 10, forming a standard Cassegrain double-reflector antenna to ensure the function of the antenna.

[0049] Furthermore, combined with Figure 1 The feeding network 10 is arranged on the main axis of the main reflector 1 to ensure the equal phase radiation of the electromagnetic waves.

[0050] The design and manufacture of the structural and functional integrated dual-reflector antenna of the present invention, the internal embedded arc rod group of the main reflector, and the concave arrangement of the "three-point six-rod" support structure can achieve the following advantages:

[0051] 1. In the present invention, the main reflector 1 is pre-buried with the arc rod group 2, which not only enables the main reflector 1 to have the structural characteristics of carrying a large detector, but also the antenna function is not affected after the detector is actively separated above the concave surface of the main reflector 1.

[0052] 2. The main reflector 1 of the present invention is pre-embedded with an arc-shaped rod group 2, which improves the torsional stiffness of the main reflector in the circumferential direction, thereby improving the torsional mode of the overall detector.

[0053] 3. The support structure composed of three identical "V"-shaped support rods realizes the layout design of the sub-reflector 9 in a smaller space, and reserves more space for the design of the detector above the concave surface of the main reflector 1; at the same time, its stability and reliability ensure the support rigidity requirements of the sub-reflector.

[0054] In the description of this application, it should be noted that the terms "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0055] It should also be noted that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0056] Those skilled in the art can clearly understand that, for the sake of convenience and brevity in description, the identification content specifically executed by the above-described system and device can refer to the corresponding process in the aforementioned method embodiment.

[0057] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they still fall within the protection scope of the present invention.

Claims

1. A dual-reflector antenna with integrated structure and function, characterized in that: include: Main reflector, sub-reflector, feed network and supporting structure; The main reflector is composed of a front skin, a rear skin, an aluminum honeycomb and a pre-embedded arc rod group. The arc rod group is pre-embedded as a whole when the main reflector is bonded and formed; The sub-reflector, the feeding network and the supporting structure are arranged on the concave side of the main reflector according to the geometric relationship of a standard Cassegrain double-reflector antenna.

2. The dual-reflector antenna with integrated structure and function according to claim 1, characterized in that: The arc rod group includes 4 positioning joints and 4 stabilizing joints. The 4 positioning joints and the 4 stabilizing joints are equidistantly staggered on an arc with the center point of the main reflector as the center. The 4 positioning joints and the 4 stabilizing joints are connected in sequence through 8 carbon fiber arc rods so that the orthographic projection shape is a regular octagon. The 4 positioning joints are connected in sequence through 4 carbon fiber arc rods so that the orthographic projection shape is a square.

3. The dual-reflector antenna with integrated structure and function according to claim 2, characterized in that: The arc rod group also includes four auxiliary joints, which are respectively located on the extended arcs from the center point of the main reflector to the four positioning joints. Each of the auxiliary joints is connected to two adjacent stable joints through two equal-length carbon fiber arc rods, and each of the auxiliary joints is connected to the corresponding positioning joint through one carbon fiber arc rod.

4. The dual-reflector antenna with integrated structure and function according to claim 2 or 3, characterized in that: The surface equation formed by the arc rod group is consistent with the surface equation of the main reflector, and the positioning joint, the stabilizing joint, the auxiliary joint and the carbon fiber arc rod are all fixed by bonding + riveting.

5. The dual-reflector antenna with integrated structure and function according to claim 3, characterized in that: The positioning joint is made of metal, the stabilizing joint and the auxiliary joint are made of non-metallic materials, the positioning joint is connected to the upper detector on the concave surface of the main reflector, and is connected to the lower detector on the convex surface of the main reflector; the stabilizing joint is connected to the lower detector on the convex surface of the main reflector.

6. The dual-reflector antenna with integrated structure and function according to claim 1, characterized in that: When the arc rod group is pre-embedded, the concave surface of the arc rod group is firstly bonded to the convex surface of the front skin of the main reflector; secondly, the aluminum honeycomb is bonded to the part of the front skin convex surface other than the arc rod group; then the concave surface of the rear skin of the main reflector is bonded to the convex surface of the arc rod group and the aluminum honeycomb, and finally the above whole is pressurized and cured to form the main reflector.

7. The dual-reflector antenna with integrated structure and function according to claim 1, characterized in that: The support structure is composed of three identical V-shaped support rods. The support structure is an equilateral triangle in the projection direction of the main reflector, and the connection points with the main reflector are all located at the vertices of the equilateral triangle, and the connection points with the sub-reflector are all located at the midpoints of the three sides of the equilateral triangle.

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