Light satellite-borne corner cut square horn

Abstract

The utility model provides a light satellite-borne corner-cut square horn which comprises a metal flange joint and a corner-cut square horn body. A main body of the corner-cut square horn body is in a square flaring cone shape, tangent planes perpendicular to the plane of the flange connector are arranged at the four edge positions of the square flaring cone in the direction from the horn opening to the flange connector, and an octagon is formed at the horn opening of the corner-cut square horn body. The octagon is composed of four top edges of a square flared cone and top edges of four tangent planes, the lengths of the four top edges of the square flared cone are the same, the lengths of the top edges of the four tangent planes are the same, and the lengths of the top edges of the four tangent planes are determined according to the mounting position requirements of a central corrugated horn and peripheral square horns of the spaceborne antenna. The light satellite-borne corner cut square horn is prepared from the carbon fiber composite material, the weight of a feed source can be greatly reduced so as to ensure the total weight of a whole antenna system, a corner cut mode is adopted, the length of the top edge of a tangent plane is used as a control size, the spatial position requirement is met, and the feed source performance requirement is also met.

Description

Technical Field

[0001] The utility model relates to the technical field of satellite-borne antennas, in particular to a light satellite-borne corner-cut square horn. Background Art

[0002] A satellite-borne antenna is mainly composed of the main antenna surface, feed source and support. The feed system is the heart of the satellite-borne antenna, and its quality is directly related to the realization of the antenna function. The horn is one of the important components of the feed system and is the channel for transmitting electrical signals. It is usually made of welded aluminum plates. It is not only heavy, but also large in volume and thickness, which makes it difficult to meet the requirements of satellite-borne antennas. In addition, the satellite-borne antenna adopts a feed layout design with a corrugated horn installed in the center and square horns installed around. In the limited installation space, the center corrugated horn obtained by the traditional design method according to the radiation pattern requirements and the surrounding square horns have spatial position interference. Summary of the invention

[0003] In order to solve the problems existing in the prior art, the utility model proposes a lightweight satellite-borne cut-corner square horn, which can greatly reduce the weight of the feed source and meet the installation position requirements.

[0004] The technical solution of the utility model is:

[0005] The light satellite-borne square horn comprises a metal flange joint and a square horn body; wherein the square horn body is made of carbon fiber composite material;

[0006] The main body of the cut-corner square horn is a square flared cone, and at the four edges of the square flared cone, from the horn mouth to the flange joint direction, there are cut surfaces perpendicular to the plane of the flange joint, forming an octagon at the horn mouth of the cut-corner square horn; the octagon is composed of four top edges of the square flared cone and four top edges of the cut surfaces, the four top edges of the square flared cone have the same length, the top edges of the four cut surfaces have the same length, and the top edge lengths of the four cut surfaces are determined by the central corrugated horn of the satellite antenna and the installation position requirements of the surrounding square horns.

[0007] Furthermore, the flange joint is a metal flange joint, which is prepared separately from the cut-corner square horn body and fixedly connected to obtain the lightweight satellite-borne cut-corner square horn.

[0008] Furthermore, the flange joint and the cut-corner square horn body are made by integrally molding carbon fiber composite material.

[0009] Furthermore, the cut-corner square horn body is made of M40J / 4211 resin-based carbon fiber composite material.

[0010] Furthermore, the inner cavity of the cut-corner square speaker is metallized.

[0011] Furthermore, the manufacturing tolerance of the inner cavity size of the cut-corner square horn is ±0.1 mm, and the flatness is no more than 0.1 mm.

[0012] Furthermore, the overall height of the lightweight satellite-borne square horn is 279±0.15 mm, and the wall thickness of the square horn is 1 mm.

[0013] Beneficial Effects

[0014] The utility model adopts carbon fiber composite material to prepare a lightweight satellite-borne cut-corner square horn. CFRP (carbon fiber material) has low specific gravity, high specific stiffness, high specific strength, and good resistance to space environment. It can greatly reduce the weight of the feed source to ensure the total weight of the entire antenna system. Moreover, according to the installation position requirements of the central corrugated horn and the surrounding square horns of the satellite-borne antenna, the square horns are cut corners, and the top edge length of the cut surface is used as the control dimension to obtain the cut-corner square horn, which meets both the spatial position requirements and the feed source performance requirements.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 1 : A three-dimensional schematic diagram of the utility model;

[0018] Figure 2 : The front view of the utility model;

[0019] Figure 3 : A top view of the utility model;

[0020] Figure 4 : A schematic structural diagram of an embodiment. DETAILED DESCRIPTION

[0021] The embodiments of the present invention are described in detail below. The embodiments are exemplary and intended to be used to explain the present invention, but should not be construed as limiting the present invention.

[0022] This embodiment is a square horn for a satellite-borne antenna. The satellite-borne antenna adopts a feed layout design in which a corrugated horn is installed in the center and square horns are installed around. In a limited installation space, the center corrugated horn obtained by a traditional design method according to the requirements of the radiation pattern and the surrounding square horns have spatial position interference. For this reason, the utility model proposes a lightweight satellite-borne cut-corner square horn.

[0023] like Figure 1 to Figure 3As shown, the light satellite-borne corner-cut square horn includes a flange joint and a corner-cut square horn body. The flange joint can be a metal flange joint, which is separately prepared with the corner-cut square horn body and fixedly connected to obtain the light satellite-borne corner-cut square horn; it can also be prepared by integrally molding with the corner-cut square horn body using carbon fiber composite materials.

[0024] The main body of the cut-corner square horn is in a square flared cone shape, and the bottom is a square.

[0025] At the four edges of the square flared cone, from the flare mouth to the flange joint direction, there are cut surfaces perpendicular to the plane of the flange joint, so that an octagon is formed at the flare mouth of the cut-corner square horn body. The octagon is composed of the four top sides of the square flared cone and the top sides of the four cut surfaces. The four top sides of the square flared cone have the same length, and the top sides of the four cut surfaces have the same length. The length of the top sides of the four cut surfaces is determined by the central corrugated horn of the satellite antenna and the installation position requirements of the surrounding square horns. In this embodiment, the overall height of the lightweight satellite-borne cut-corner square horn is 279±0.15mm, and the wall thickness of the cut-corner square horn body is 1mm.

[0026] Since the square speaker is a channel for transmitting electrical signals, the inner cavity of the cut-angle square speaker is metallized, and the inner cavity requires very high smoothness, flatness and high precision. In this embodiment, the manufacturing tolerance of the inner cavity size is required to be ±0.1mm, the flatness is not greater than 0.1mm, and the inner cavity is required to be conductive.

[0027] The cut-angle square speaker body is made of carbon fiber material CFRP, which has low specific gravity, high specific stiffness, high specific strength, and good resistance to space environment. In this embodiment, in order to ensure that the square speaker meets the space environment, maintains good dimensional stability, and considers the processability of the cut-angle speaker, the space-borne square speaker adopts M40J / 4211 resin-based carbon fiber composite material.

[0028] In the CFRP molding process, commonly used mold materials include aluminum, steel, CFRP, low expansion alloys, cement molds, etc. Considering factors such as design cost and demolding structure, LY12 aluminum alloy material is selected in this embodiment. Since the square horn needs to ensure the inner cavity size accuracy and smoothness, and the appearance has a high degree of flatness, the mold adopts a core mold structure, and an external packaging auxiliary tooling (equalizing plate) is designed during molding to ensure the appearance quality. Considering the demolding and the neatness of the CFRP edge, a demolding ejection mechanism and an edge metal frame are designed. Since the aluminum alloy material has a high linear expansion coefficient (22×10 -6 / ℃), during the high-temperature forming process of CFRP, the size of the aluminum core mold will change, which is extremely unfavorable for square speakers with high size requirements. In the design, we use the thermal compensation method to remove the linear expansion of the aluminum alloy when determining the size of the core mold, thus ensuring the inner cavity size accuracy of the speaker size.

[0029] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention.

Claims

1. A light satellite-borne corner-cut square horn, characterized in that: It comprises a flange joint and a cut-angle square horn body; wherein the cut-angle square horn body is made of carbon fiber composite material; The main body of the cut-corner square horn is a square flared cone, and at the four edges of the square flared cone, from the horn mouth to the flange joint direction, there are cut surfaces perpendicular to the plane of the flange joint, forming an octagon at the horn mouth of the cut-corner square horn; the octagon is composed of four top edges of the square flared cone and four top edges of the cut surfaces, the four top edges of the square flared cone have the same length, the top edges of the four cut surfaces have the same length, and the top edge lengths of the four cut surfaces are determined by the central corrugated horn of the satellite antenna and the installation position requirements of the surrounding square horns.

2. According to claim 1, a light satellite-borne corner-cut square speaker is characterized in that: The flange joint is a metal flange joint, which is prepared separately from the cut-corner square horn body and fixedly connected to obtain the lightweight satellite-borne cut-corner square horn.

3. According to claim 1, a light satellite-borne corner-cut square speaker is characterized by: The flange joint and the cut-corner square horn body are manufactured by integrally forming carbon fiber composite material.

4. According to claim 1, a light satellite-borne corner-cut square speaker is characterized by: The cut-corner square horn body is made of M40J / 4211 resin-based carbon fiber composite material.

5. According to claim 1, a light satellite-borne corner-cut square speaker is characterized in that: The inner cavity of the cut-corner square speaker is metalized.

6. According to claim 1, a light satellite-borne corner-cut square speaker is characterized by: The manufacturing tolerance of the inner cavity size of the cut-corner square horn is ±0.1mm, and the flatness is no more than 0.1mm.

7. According to claim 1, a light satellite-borne corner-cut square speaker is characterized by: The overall height of the lightweight satellite-borne square horn is 279±0.15 mm, and the wall thickness of the square horn is 1 mm.

Images