CN210430077U

CN210430077U - Composite material spiral antenna spiral arm supporting structure

Info

Publication number: CN210430077U
Application number: CN201921517174.XU
Authority: CN
Inventors: 朱瑞龙; 张文; 曹诞
Original assignee: Xi'an Juzhen Wireless Technology Co ltd
Current assignee: Xi'an Juzhen Wireless Technology Co ltd
Priority date: 2019-09-11
Filing date: 2019-09-11
Publication date: 2020-04-28
Anticipated expiration: 2029-09-11

Abstract

The utility model relates to a combined material helical antenna spiral arm bearing structure for solve the not enough problem of helical antenna spiral arm rigidity. This bearing structure includes: left branch fagging, right branch fagging, fibre reinforced silk, resin substrate, spiral arm and center post. After the spiral antenna is assembled, the antenna spiral arm is supported and reinforced by using the molding characteristic of the hand-lay-up composite material, so that the integral rigidity of the spiral antenna is improved. The utility model discloses simple structure, shaping intensity is high, the quality is light, can effectively improve helical antenna spiral arm stability and antenna global rigidity, makes helical antenna satisfy the operation requirement under the harsh mechanical environment.

Description

Composite material spiral antenna spiral arm supporting structure

Technical Field

The utility model relates to an antenna technology field, especially helical antenna spiral arm bearing structure.

Background

The spiral antenna is a commonly used satellite-borne antenna, and the spiral arm is used as a key structure of the spiral antenna, and the pitch and the line shape of the spiral arm directly influence the radiation characteristic of the antenna. Particularly, the four spiral arms are combined and welded on the central column, so that a cantilever beam structure is formed, the rigidity of the cantilever beam structure is poor, the inherent frequency of the cantilever beam structure is low, and the cantilever beam structure is easy to damage in the transmitting process. When the long pitch or the number of spiral turns is large, the spiral arm must be reinforced and supported to ensure the normal operation of the antenna.

The existing spiral antenna supporting structure is structurally characterized in that a 3D printing integrally-formed partition plate framework is adopted to support a spiral antenna, but the framework is only suitable for single-arm spiral winding with a thinner spiral arm, and cannot be installed after the spiral arm and a central column are welded and heat treated; in another patent, "helical antenna supporting structure" (application number: 200520147035.4), a flexible pcb structure is supported by a supporting column and a shell, and is fed by a supporting base, and the structure cannot effectively support a metal bent four-arm helical antenna; the patent 'a manufacturing method for forming a composite material helical antenna' (application number: 201410649559.7), the antenna is composed of an antenna base body and a helical conductor wound on the surface of the antenna base body, and a forming tool is manufactured according to the theoretical appearance of the antenna base body; and paving a glass prepreg on the surface of the forming tool for primary curing forming and finish machining, paving a layer of glass prepreg, paving a conductor belt with a helix angle, and finally performing secondary curing forming. The antenna is wrapped by the composite material, the dielectric property of the composite material has large influence on the antenna in the manufacturing process, and the design requirements of different diameters of the spiral arms of the four-arm spiral antenna cannot be met.

Disclosure of Invention

Technical problem to be solved

Poor to four arms helical antenna global rigidity, the spiral arm only relies on the solder joint fixed, and the reliability is not good under severe mechanical environment, the utility model provides a problem is: the spiral arm is fixed on the spiral antenna central column through the supporting plate by utilizing the characteristic that the hand-pasted composite material can be formed at will. The structure can effectively shorten the length of the spiral arm of the unsupported part and improve the natural frequency of the spiral antenna and the integral rigidity of the antenna.

Technical scheme

A spiral arm supporting structure of a composite material spiral antenna is characterized by comprising a central column, a left supporting plate, a right supporting plate and fiber reinforced fibers, wherein the surface of the column body of the central column is provided with a mounting platform for mounting the left supporting plate and the right supporting plate; the left supporting plate and the right supporting plate are provided with mounting structures matched with the central column mounting platform; grooves conformal with the spiral arms are processed on the side walls of the left supporting plate and the right supporting plate; the spiral arm is fixed on the left supporting plate and the right supporting plate through fiber reinforced silk binding; the fiber reinforced silk preimpregnation resin base material is formed by mixing the fiber reinforced silk and the resin base material into a composite material by adopting a hand lay-up forming process.

The mounting platform is a square platform, and the side wall of the mounting platform is provided with a threaded hole for fixing the support plate.

The left support plate (2) and the right support plate (3) are made of medium materials.

The depth of the groove is half of the diameter of the spiral arm.

The fiber reinforced yarns (5) are glass fiber yarns.

The resin base material (6) is epoxy resin.

Advantageous effects

The utility model provides a pair of combined material helical antenna spiral arm bearing structure, after helical antenna assembly is accomplished, utilize the hand to paste combined material shaping characteristic and support the reinforcement to the antenna spiral arm, realize helical antenna global stiffness's promotion. The utility model discloses simple structure, shaping intensity is high, the quality is light, can effectively improve helical antenna spiral arm stability and antenna global rigidity, makes helical antenna satisfy the operation requirement under the harsh mechanical environment. The glass fiber reinforced epoxy resin composite material prepared by the hand pasting process fixes the spiral arm, particularly the long-pitch and multi-turn spiral arm, and effectively solves the problem that the application of the spiral antenna is restricted due to insufficient rigidity of the spiral antenna.

Drawings

FIG. 1 is a schematic view of the assembly of the present invention;

FIG. 2 is a schematic view of the installation of the support plate of the present invention;

FIG. 3 is a schematic view of the supporting plate of the present invention;

fig. 4 is a schematic view of the fixing of the swing arm of the present invention;

Detailed Description

The invention will now be further described with reference to the following examples and drawings:

as shown in fig. 1, the present invention provides a spiral arm supporting structure for a composite material helical antenna, which is characterized in that the structure comprises: center post 1, left branch fagging 2, right branch fagging 3, spiral arm 4, fiber reinforcement silk 5, resin substrate 6.

As shown in FIG. 2, the column body of the central column 1 is designed with a square mounting platform, and the side wall is designed with a threaded hole for fixing a support plate. The left support plate 2 and the right support plate 3 are fixed on the square platform by screws and are fixed with each other by screws.

As shown in fig. 3, the left support plate 2 and the right support plate 3 are respectively provided with 6 mounting and fixing hole sites, and the two support plates are combined to form a square mounting groove which is matched with the square mounting platform of the central column 1; the left support plate 2 and the right support plate 3 are respectively provided with two grooves which are conformal with the radial arms 4, the radial arms 4 are clamped into the conformal grooves after the grooves are installed on the central column 1, and the depth of the grooves is preferably half of the radial diameter of the radial arms. The left support plate 2 and the right support plate 3 are made of a dielectric material, and in a preferred application example of the helical antenna, the dielectric material is a glass fiber reinforced epoxy resin composite material.

As shown in fig. 4, after the fiber-reinforced yarn 5 is impregnated into the resin base material 6, the radial arm 4 is bound to the left support plate 2 and the right support plate 3 by a plurality of turns. In a preferred embodiment of the present helical antenna, the fiber-reinforced filaments 5 are glass fiber filaments. The resin substrate 6 is a thermoplastic resin, in this embodiment, the resin substrate is an epoxy resin, and the specific type and proportion are epoxy resin E51: curing agent tetraethylenepentamine: diluent 3660 ═ 100: 11: 10.

Claims

1. a spiral arm supporting structure of a composite material spiral antenna is characterized by comprising a central column (1), a left supporting plate (2), a right supporting plate (3) and a fiber reinforced filament (5), wherein the surface of the column body of the central column (1) is provided with a mounting platform for mounting the left supporting plate (2) and the right supporting plate (3); the left support plate (2) and the right support plate (3) are provided with mounting structures matched with the mounting platform of the central column (1); grooves which are conformal with the spiral arms (4) are processed on the side walls of the left support plate (2) and the right support plate (3); the spiral arm (4) is fixed on the left support plate (2) and the right support plate (3) through the binding of fiber reinforced fibers (5); the fiber reinforced yarns (5) are pre-soaked in the resin base material (6), and the fiber reinforced yarns (5) and the resin base material (6) are mixed and formed into the composite material by adopting a hand lay-up forming process.

2. The composite helical antenna radial arm support structure of claim 1, wherein said mounting platform is a square platform with threaded holes in the sidewalls for securing the support plate.

3. The composite helical antenna radial arm support structure of claim 1, wherein the left support plate (2) and the right support plate (3) are dielectric materials.

4. The composite helical antenna radial arm support structure of claim 1, wherein said groove depth is one half of the radial arm diameter.

5. The composite helical antenna radial arm support structure of claim 1, wherein the fiber reinforced filaments (5) are fiberglass filaments.

6. The composite helical antenna radial arm support structure of claim 1, wherein said resin substrate (6) is an epoxy resin.