CN114335971B - Satellite-borne satellite expandable spiral antenna and preparation method thereof - Google Patents
Satellite-borne satellite expandable spiral antenna and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a satellite-borne satellite expandable spiral antenna and a preparation method thereof. The folding and compressing of the antenna are completed through the compression release mechanism, so that the overall dimension of the spiral antenna in the folded state is ensured to meet the satellite carrying space requirement.
Description
Technical Field
The invention relates to the field of antenna design of satellite payloads, in particular to a satellite-borne satellite expandable helical antenna and a preparation method thereof.
Background
The spiral antenna is an antenna widely applied in the satellite communication field, has higher gain and excellent circular polarization radiation performance, is used as the effective load of a satellite communication system, and is an important precondition for realizing a DCS satellite data collection system. However, the conventional helical antenna has a relatively large size, and cannot meet satellite space requirements, so that the application of the helical antenna is limited.
Disclosure of Invention
The invention provides a satellite-borne satellite expandable spiral antenna and a preparation method thereof, which are used for solving the problem that the existing spiral antenna cannot meet actual requirements.
In a first aspect, the present invention provides a satellite-borne satellite deployable helical antenna, the helical antenna comprising: the device comprises a polarizer, a top cover, a spiral vibrator, a flexible rope, a compression release mechanism and a supporting cylinder;
one end of the spiral vibrator and one end of the flexible rope are connected with the top cover, the other end of the spiral vibrator and one end of the flexible rope are connected with the polarizer, the polarizer shell is a base of the antenna, and the spiral antenna is supported by the base;
the flexible rope and the spiral vibrator are connected to the polarizer, and the difference is that the spiral vibrator is not only structurally connected, but also needs to be electrically connected.
The flexible ropes are arranged in a plurality, the flexible ropes are arranged along the axial direction of the spiral vibrator, the unfolding working form of the spiral vibrator is controlled through the flexible ropes, and the working state of the spiral antenna is enabled to have preset rigidity through the self elastic restoring force of the spiral vibrator and the tension of the flexible ropes.
The flexible rope is fixedly connected with the preset position of each layer of the spiral vibrator.
The geometric parameters of the spiral vibrator in the working state comprise: the number of turns, helix angle, pitch diameter, and wire diameter, the geometric parameters being determined by the radiation characteristics of the helical antenna.
Optionally, the tail ends of the spiral vibrators are bent to obtain a bending structure, the bending structure is fixed to the polarizer and the top cover through a fixing piece, wherein the bending structure is an abnormal spiral section, the spiral angle of the abnormal spiral section is lower than the normal spiral angle, and a transition section with a preset length is arranged between the bending structure and the spiral structure on the spiral vibrators.
Optionally, the flexible cord is fixed to the top cover and polarizer by a first pressure plate, wherein the first pressure plate is preferably made of an insulating material, and if made of a metal material, the volume and weight of the first pressure plate should be controlled.
Optionally, the spiral vibrator is fixed to the polarizer shell through the pressing seat and the third pressing plate, and the pressing seat and the third pressing plate are made of insulating materials, so that the spiral vibrator is insulated from the polarizer shell, and the spiral vibrator is electrically connected with the microstrip circuit in the polarizer through a wiring terminal and other structures.
The support cylinder is fixed on the base and is positioned in a spiral vibrator assembly formed by the spiral vibrators, wherein the spiral vibrator assembly is of an integral structure formed by a plurality of spiral vibrators and flexible ropes;
the expandable spiral antenna is in a compressed and folded state before being emitted, and when being folded, the top cover is compressed and restrained on the supporting cylinder through the compression release mechanism, and the spiral vibrators are distributed around the supporting cylinder.
When the antenna is folded, the top cover is rotated and pressed down, the number of turns of the spiral vibrator is increased, axial positioning is carried out through a positioning spigot of the top cover and the supporting cylinder, a V-shaped groove is arranged on the supporting cylinder, and circumferential positioning is carried out through the V-shaped groove and a V-shaped boss of the top cover.
The compression release mechanisms are arranged on two sides of the base, and the top cover is compressed and fixed on the supporting cylinder through the self-rebound wrapping tape, so that the spiral vibrator is folded and compressed.
Optionally, the material of the spiral vibrator is copper alloy wire, stainless steel wire or memory alloy.
Alternatively, the cross section of the spiral vibrator can be round, rectangular or the like.
In a second aspect, the present invention provides a method of making any one of the above-described satellite-borne satellite-deployable helical antennas, the method comprising:
after the two ends of the spiral vibrator assembly are fixed on the polarizer and the top cover, the spiral vibrator is electrically connected on the top cover, and the spiral vibrator is electrically connected with a circuit in the polarizer. The polarizer can synthesize electromagnetic waves of a plurality of spiral vibrators to form circularly polarized electromagnetic signals, and the circularly polarized electromagnetic signals are output through the radio frequency connector.
The spiral vibrators are fixed in position through a preset positioning tool, so that the spiral vibrators are converted from a free state to a working state, and the spiral vibrators are bound and fixed by flexible ropes in the working state to form a whole, which is called a spiral vibrator assembly.
Optionally, the preset positioning tool is determined according to the working state of the spiral vibrator, if the spiral vibrator assembly is cylindrical, the positioning tool is also cylindrical; if the spiral vibrator component is conical, the positioning tool is conical. Taking a cylinder as an example, processing a spiral groove at a preset position on the cylinder, reserving an operation space at a position corresponding to the flexible rope, performing wire binding and glue dispensing operation, and fixing the spiral vibrator and the position of the flexible rope through the wire binding and glue dispensing operation, wherein the size of the spiral groove is the same as the working state size of the spiral vibrator.
The invention has the following beneficial effects:
according to the invention, the positioning tool is used for ensuring the position precision of the spiral vibrator, the forming work of the spiral vibrator assembly is completed through binding and dispensing operation, so that the spiral vibrator works in a non-fully unfolded state, the spiral antenna has high enough shape and position precision and rigidity through the tension of the flexible rope and the elastic restoring force of the spiral vibrator, and finally, the electrical performance index of the spiral antenna is ensured.
The folding and compressing of the antenna are completed through the compression release mechanism, so that the overall dimension of the spiral antenna in the folded state is ensured to meet the satellite carrying space requirement. Through the cooperation of top cap and support section of thick bamboo, draw in the spiral oscillator around supporting the section of thick bamboo, also guaranteed that flexible rope can be reliable accomodate, the string of colluding when avoiding spiral antenna to expand.
The foregoing description is only an overview of the present invention, and is intended to be implemented in accordance with the teachings of the present invention in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present invention more readily apparent.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
fig. 1 is a schematic diagram of a deployed state structure of a helical antenna according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a formed shape of a helical vibrator assembly according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a positioning tool for a spiral vibrator according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a lower end mounting structure of a spiral oscillator according to an embodiment of the present invention;
fig. 5 is a schematic diagram of an upper end mounting structure of a helical vibrator according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a folded state of a helical antenna according to an embodiment of the present invention;
description of the drawings: the polarizer comprises a polarizer body 1, a supporting cylinder 2, a spiral vibrator 3, a flexible rope 4, a top cover 5, a compressing seat 6, a third pressing plate 7, a polarizer shell 8, a first pressing plate 9, a second pressing plate 10, a groove 11 and a preset positioning tool 12.
Detailed Description
Aiming at the problem that the existing spiral antenna cannot meet actual requirements, the embodiment of the invention ensures the position accuracy of the spiral oscillator through the positioning tool, finally ensures the electrical performance index of the spiral antenna, and simultaneously folds the spiral antenna through the compression release mechanism, thereby ensuring the reduction of the external dimension of the spiral antenna in a folded state and meeting the satellite carrying space requirement. The present invention will be described in further detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
A first embodiment of the present invention provides a satellite-borne satellite deployable helical antenna, see fig. 1, comprising: the device comprises a polarizer 1, a spiral vibrator 3, a flexible rope 4, a top cover 5 and a compression release mechanism;
one end of the spiral vibrator 3 and one end of the flexible rope 4 are connected with the top cover 5, the other end of the spiral vibrator 3 is connected with the polarizer 1, the other end of the flexible rope 4 is connected with the polarizer shell 8, and the polarizer shell 8 is a base of the spiral antenna and is used for supporting the spiral antenna;
that is, the base in the embodiment of the present invention is the polarizer housing 8;
in specific implementation, the flexible rope and the spiral vibrator are connected to the polarizer, and the difference is that the spiral vibrator 3 in the invention is not only structurally connected, but also needs to be electrically connected;
specifically, in the embodiment of the invention, the bottom ends of the four spiral vibrators 3 are connected with four electric connectors, the electric connectors are connected with the polarizer microstrip circuit, and finally output is carried out through one electric connector, and the top ends of the four spiral vibrators are electrically connected with each other through a wire or a metal member, so that the electric connection of the spiral vibrators 3 is finally realized.
It should be noted that in the embodiment of the present invention, the number of flexible ropes 4 is plural, and the plural flexible ropes 4 are disposed along the axial direction of the spiral vibrator 3, and the deployment working form of the spiral vibrator 3 is controlled by the flexible ropes 4, so as to control the self restoring force of the spiral vibrator 3 and the tension of the flexible ropes 4, so that the working state of the spiral antenna has preset rigidity, thereby meeting various working performance requirements of the spiral antenna;
in specific implementation, the flexible rope 4 in the embodiment of the invention is fixedly connected with each layer of preset position of the spiral oscillator 3, and the main structure of the spiral antenna is obtained through the connection between the flexible rope 4 and the spiral oscillator 3.
In specific implementation, the embodiment of the invention is that the four spiral vibrators 3 are subjected to position constraint through the flexible ropes 4 to form the spiral vibrator assembly, and finally the main body structure of the spiral antenna is obtained.
The spiral vibrator assembly in the embodiment of the present invention may be in a cylindrical shape or a conical shape, and a specific person skilled in the art may set the spiral vibrator assembly according to actual needs, and in a specific implementation, the cross section of the spiral vibrator 3 in the embodiment of the present invention may be in a circular shape or a rectangular shape, and a specific person skilled in the art may set the spiral vibrator assembly at will, which is not particularly limited.
It should be noted that, in the embodiment of the present invention, the ends of the spiral vibrator 3 are bent to obtain a bending structure (i.e., a structure of the end pair bending portion of the spiral vibrator 3 as shown in fig. 5), and the bending structure is fixed to the polarizer 1 and the top cover 5 by a preset fixing piece so as to fix the spiral vibrator 3, where the bending structure is an abnormal spiral section, and a transition section with a preset length is provided between the bending structure and the spiral structure on the spiral vibrator 3.
That is, the end of the spiral vibrator 3 is provided with the bending structure, the spiral vibrator can be fully restrained and fixed through the bending structure, so that the end of the spiral vibrator 3 is effectively prevented from rotating in the folding and unfolding processes, the electric connection of the polarizer is made into static connection through the arrangement mode, the electric connector is free from external force, the electric connection mode is simple and reliable, the stability of the working performance of the spiral antenna is ensured, and the user experience is finally improved.
In general, in the embodiment of the present invention, bending structures are disposed at both ends of the spiral vibrator 3, so as to facilitate constraint and fixation of the spiral vibrator 3. In the prior art, the end part of the spiral vibrator 3 is directly fixed, and the spiral vibrator 3 can be effectively prevented from rotating at the constraint position under the condition that the spiral vibrator 3 is folded, so that the abrasion of the spiral vibrator 3 can be effectively avoided, and the external force caused by the rotation of the spiral vibrator can be effectively avoided when the end part of the electric connector is connected.
In the embodiment of the invention, the pressing blocks on the top cover 5 are all preferably made of insulating materials, and if made of metal materials, the volume and the weight of the pressing blocks should be controlled so as to minimize the influence of the metal materials on the electric performance of the antenna, and the pressing blocks and the pressing seat on the polarizer 1 are necessarily made of nonmetallic materials, and it should be noted that, in order to avoid the influence of each pressing block on the overall performance of the antenna, in the embodiment of the invention, the volume and the total amount of all the pressing blocks are made as small as possible on the premise of meeting the fixing requirement so as to minimize the influence of the pressing blocks on the performance of the antenna.
Specifically, the flexible cord 4 is fixed to the polarizer 1 and the top cover 5 by a second pressing plate 10, wherein the second pressing plate 10 is preferably made of an insulating material, and the second pressing plate 10 on the top cover can be made of a metal material, but the volume and the weight of the second pressing plate should be controlled by the metal material.
And fixing the spiral vibrator 3 to the top cover 5 by the first pressing plate 9, and fixing the spiral vibrator 3 to the polarizer 1 by the pressing seat 6 and the third pressing plate 7, wherein the pressing seat 6 and the third pressing plate 7 are both made of insulating materials or may be made of non-metal materials, and in specific implementation, a person skilled in the art can set the spiral vibrator according to actual needs, and the invention is not limited thereto.
In the embodiment of the invention, the pressing seat 6 and the third pressing plate 7 are both made of insulating materials, so that the influence of the metal pressing plate on the performance of the spiral vibrator 3 is avoided.
In a specific implementation, the geometric parameters in the embodiment of the present invention include a number of turns, a helix angle, a pitch diameter, a wire diameter, etc., and those skilled in the art can determine various geometric parameters in the working state of the helical vibrator 3 through multiple numerical calculations, where the various geometric parameters are determined by the radiation characteristics of the helical antenna, and the geometric parameters can be set by those skilled in the art according to actual needs, and the present invention is not limited in particular.
In an embodiment of the present invention, the helical antenna may further include: a support cylinder 2; as shown in fig. 1, 4 and 5, in the embodiment of the present invention, the supporting cylinder 2 is fixed on the base, that is, on the polarizer casing 8, and is located inside the spiral vibrator assembly formed by the spiral vibrators, and in the embodiment of the present invention, the spiral vibrator assembly is an integral structure formed by a plurality of spiral vibrators 3 and flexible ropes 4; the supporting cylinder is made of nonmetal materials, and materials with excellent wave transmission performance such as glass fiber reinforced plastic and the like are required to be selected.
The expandable spiral antenna is in a compressed and folded state before being emitted, and when being folded, the top cover 5 is compressed and restrained on the supporting cylinder 2 through the compression release mechanism, and the spiral vibrators 3 are distributed around the supporting cylinder.
When the antenna is folded, the top cover 5 is rotated and pressed down, the number of turns of the spiral vibrator 3 is increased, axial positioning is carried out on the spiral vibrator through a positioning spigot of the top cover 5 and the supporting cylinder 2, a V-shaped groove is formed in the supporting cylinder 2, and circumferential positioning is carried out on the spiral vibrator through the V-shaped groove and a V-shaped boss of the top cover 5.
The compression release mechanisms are arranged on two sides of the polarizer, and the top cover 5 is compressed and fixed on the supporting cylinder 2 through the self-rebound wrapping tape, so that the spiral vibrator 3 is folded and compressed.
In short, in the embodiment of the present invention, the strap is snapped onto the groove 11, two ends of the strap are fixed to the polarizer housing 8, and finally the spiral vibrator 3 is folded and fixed.
That is, the embodiment of the invention is provided with the structures of the supporting cylinder 2 and the top cover 5, and the constraint positioning between the top cover 5 and the supporting cylinder 2 is relied on under the folding state by the compression release mechanism, so that the spiral oscillator assembly can be reliably stored, the existing spiral antenna cannot be stored, even if the spiral oscillator assembly can be stored, the spiral oscillator assembly 3 needs to be compressed on the base, the storage mode can enable the spiral angle of the spiral oscillator assembly 3 to be changed into 0 degree, namely the number of turns is pressed, the spiral oscillator assembly 3 is likely to deform, and the spiral oscillator assembly cannot rebound to a normal working state, so that the working performance of the spiral nature is affected.
In the embodiment of the present invention, the material of the spiral vibrator 3 is copper alloy, stainless steel, memory alloy, or the like. In specific implementation, the spiral vibrator 3 in the embodiment of the present invention may be beryllium bronze or stainless steel wire for springs, etc.
The helical antenna according to the present invention will be explained and illustrated in detail by way of a specific example with reference to fig. 1 to 5:
as shown in fig. 1, the spiral oscillator 3 in the embodiment of the invention is a key component of the expandable spiral antenna, adopts a compression spring structure form, is used as a microwave device for transmitting and receiving microwave signals, and is used as a structural component, has high elasticity, can be compressed, folded and expanded greatly, and in order to improve the compression amount of the spiral oscillator 3, a metal material with high allowable strength and modulus, such as a stainless steel wire for a spring or beryllium bronze, needs to be selected, and although the modulus and allowable strength of the beryllium bronze are lower than those of the stainless steel wire for the spring, the allowable strength and modulus ratio of the beryllium bronze are higher than those of the stainless steel wire for the spring.
It should be noted that, in the embodiment of the present invention, for the material selection of the spiral vibrator 3, it is provided to select a metal material with a high ratio of allowable strength to modulus, and by selecting a material with a high ratio of allowable strength to modulus, the larger the compression stroke of the spiral antenna is, thereby obtaining better user experience.
In the embodiment of the invention, the fixing modes of the two ends of the spiral vibrator 3 are all full-constraint modes, namely, the two ends are respectively pressed and fixed with the polarizer 1 and the top cover 5. For this purpose, bending structures are respectively designed at the two ends of the spiral vibrator 3, wherein the bending structures are abnormal spiral sections, and a transition section with enough length is arranged between the bending sections and the normal spiral in order to avoid local yielding at the crimping root.
In the assembly of the antenna, the assembly of the helical vibrator 3 is first formed, i.e. four helical vibrators 3 are integrally bonded to the flexible rope 4 by wire bonding, as shown in fig. 2 and 3. Winding four spiral vibrators 3 onto a preset positioning tool 12, ensuring the position accuracy of the four spiral vibrators 3 by the positioning tool, taking four flexible ropes 4, binding one by one from one end of the spiral vibrators 3 along the height direction of the spiral vibrators 3, forming a plurality of knots on the spiral vibrators 3, and after binding all knots, gluing and solidifying the ropes and the spiral vibrators 3 at the knots by using glue.
Specifically, the spiral vibrator 3 is in a free state after processing, and the spiral vibrator assembly is formed in a non-free state, but the existing scheme does not have specific tools to ensure the position accuracy of the spiral vibrator 3, so that the position accuracy of the spiral vibrator 3 is difficult to ensure under the condition, based on the consideration, the positioning tool 12 is creatively provided for ensuring the position accuracy of the spiral vibrator 3, and practice proves that the positioning tool 12 can well ensure the position accuracy of the spiral vibrator 3, thereby providing a favorable foundation for the stable operation of a spiral antenna.
In addition, the flexible rope 4 is fixed by gluing after being bound with the spiral vibrator 3, and the binding point position is unchanged in a furling compression state, so that the flexible rope 4 can be ensured to effectively restrict the spiral vibrator 3 after in-orbit unfolding. The existing scheme basically adopts a fine adjustment mechanism to perform fine adjustment on the spiral vibrator 3, and the adjustment mode brings three problems, namely, how the fine adjustment mechanism is fixed with the spiral vibrator, how the fine adjustment mechanism is fixed with the flexible rope, how the fine adjustment mechanism is selected according to the fine adjustment and how the fine adjustment reference is selected. The invention is only fixed by gluing after binding the flexible rope 4 and the spiral vibrator 3, the concrete implementation is simple and easy, and the cost is very low.
The difference between the free state and the working state of the spiral vibrator 3 in the embodiment of the invention is that the free state is the state after the spiral vibrator 3 is processed and manufactured, the spiral vibrator parameters in the working state are given by electric property simulation and are in a non-fully-unfolded state, namely, the balance state is achieved by means of the restoring force of the spiral vibrator 3 and the tension of the flexible rope 4, so that the rigidity of the antenna is increased. Specifically, in the operating state, the helical vibrator 3 has a lower height, a smaller pitch, a larger pitch diameter, and a uniform number of turns than in the free state.
The positioning tool of the spiral vibrator 3 is used for determining the relative position of the spiral vibrator 3 and guaranteeing the position accuracy. A design idea is provided here, namely, a spiral groove is machined on the cylinder, and the size of the spiral groove is matched with the working state size of the spiral vibrator 3. Namely, a spiral groove is processed at a preset position on the cylinder, the size of the spiral groove is the same as the working state size of the spiral vibrator 3, an operation space is reserved at the position corresponding to the flexible rope 4, wire binding and dispensing operations are performed, and the spiral vibrator 3 and the flexible rope 4 are fixed in position through the wire binding and dispensing operations. The positioning tool is detachable, so that the spiral vibrator 3 assembly can be conveniently separated from the positioning tool after being formed.
The flexible rope 4 in the embodiment of the invention is made of a high-strength insulating material resistant to space environment, and the requirements are as follows: the strength is high, and the impact of the antenna during unfolding can be borne; wear-resistant, able to withstand the friction of the rope with the support cylinder 2 during the deployment of the antenna and during the vibration test; space irradiation resistance; the ropes meeting all the requirements are polyimide ropes, aramid ropes and the like, and the ropes adopted by the invention are polyimide ropes when the invention is specifically implemented;
specifically, the lower end of the spiral vibrator 3 assembly is fixedly connected with the polarizer 1 through the compressing seat 6 and the third pressing plate 7, the compressing seat 6 and the third pressing plate are formed by processing high-strength nonmetallic materials, insulation between the spiral vibrator 3 and the polarizer 1 is guaranteed, the compressing seat 6 is provided with a groove 11, bending sections of the spiral vibrator 3 can be restrained and fixed, and the lower end of the flexible rope 4 is fixedly pressed with the polarizer 1 through a pressing sheet. The upper end of the spiral vibrator 3 assembly is fixedly connected with the top cover 5 through a spiral line pressing block, a groove 11 is formed in the spiral line pressing block, the bending section of the spiral vibrator 3 can be restrained and fixed, and the upper end of a rope is fixedly connected through pressing block crimping.
Fig. 6 is a schematic diagram of a folded state of the helical antenna, in which the helical vibrator 3 is in a compressed and folded state, and the number of turns is increased compared with that of turns in an unfolded state, and the top cover 5 and the supporting cylinder 2 are compressed by a compression release mechanism. The top cover 5 and the supporting cylinder 2 are transversely and circumferentially positioned through the positioning spigot and the V-shaped groove, wherein the V-shaped groove is circumferentially uniformly distributed at the top end of the supporting cylinder 2, and the matched V-shaped block is arranged on the top cover 5. Thereby realizing the connection of the top cover with the supporting cylinder 2.
A second embodiment of the present invention provides a method for preparing the satellite-borne satellite-deployable helical antenna according to any one of the first embodiment of the present invention, the method comprising:
the spiral vibrators are fixed in position through a preset positioning tool, so that the state of the spiral vibrators is converted from a free state to a working state, and the spiral vibrators are bound and fixed by flexible ropes in the state to form a whole, which is called a spiral vibrator assembly.
The two ends of the spiral vibrator assembly are fixed on the polarizer and the top cover, the spiral vibrators are electrically connected on the top cover, and the spiral vibrators are electrically connected with a circuit in the polarizer. The polarizer can synthesize electromagnetic waves of a plurality of spiral vibrators to form circularly polarized electromagnetic signals, and the circularly polarized electromagnetic signals are output through the radio frequency connector.
In specific implementation, the preset positioning tool of the embodiment of the invention is determined according to the working state of the spiral vibrator, and if the spiral vibrator assembly is cylindrical, the positioning tool is also cylindrical; if the spiral vibrator component is conical, the positioning tool is conical. Taking a cylinder as an example, processing a spiral groove at a preset position on the cylinder, wherein the size of the spiral groove is the same as the working state size of the spiral vibrator, reserving an operation space at the position corresponding to the flexible rope, performing wire binding and glue dispensing operation, and fixing the spiral vibrator and the position of the flexible rope through the wire binding and glue dispensing operation.
The relevant content of the embodiments of the present invention can be understood with reference to the first embodiment of the present invention, and will not be discussed in detail herein.
Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, and accordingly the scope of the invention is not limited to the embodiments described above.
Claims (7)
1. A satellite-borne satellite deployable helical antenna, the helical antenna comprising: the device comprises a polarizer, a top cover, a spiral vibrator, a flexible rope and a compression release mechanism;
one end of the spiral oscillator and one end of the flexible rope are connected with the top cover, the other end of the spiral oscillator is connected with the polarizer, the other end of the flexible rope is connected with the base, and the spiral antenna is supported by the base;
the flexible ropes are arranged along the axial direction of the spiral vibrator, the working unfolding form of the spiral vibrator is controlled through the flexible ropes, the spiral vibrator has preset rigidity through the self elastic restoring force of the spiral vibrator and the tension of the flexible ropes, and the spiral vibrator is folded and compressed through the compression release mechanism;
the flexible rope is fixedly connected with the preset position of each layer of the spiral vibrator, and each geometrical parameter of the spiral antenna is determined according to the radiation characteristics of the spiral antenna; the geometric parameters are the screw pitch of the spiral vibrator, the number of turns of the spiral vibrator, the pitch diameter of the spiral vibrator and the diameter of the spiral vibrator;
the helical antenna further comprises: a support cylinder; the support cylinder is arranged in the spiral vibrator and in a spiral vibrator assembly formed by the spiral vibrators, wherein the spiral vibrator assembly is of an integral structure formed by a plurality of spiral vibrators and flexible ropes;
when the spiral antenna is folded, the spiral vibrator is rotated and compressed, the spiral antenna is axially positioned through the positioning spigot on the top cover and the supporting cylinder, and the spiral antenna is circumferentially positioned through the V-shaped groove on the supporting cylinder and the V-shaped boss of the top cover;
the compaction release mechanism is a self-rebound belting; two grooves are symmetrically formed in the top cover, the self-rebound strap is clamped and sleeved on the grooves, and the tail end of the self-rebound strap is fixed to the base, so that the folded spiral vibrator is fixed in position.
2. The satellite based deployable helical antenna of claim 1,
the tail end of the spiral vibrator is bent to obtain a bending structure, the bending structure is fixed to the polarizer and the top cover through a fixing piece, the bending structure is an abnormal spiral section, the spiral angle of the abnormal spiral section is smaller than the normal spiral angle, and a transition section with a preset length is arranged between the bending structure and the spiral structure on the spiral vibrator.
3. The satellite based deployable helical antenna of claim 2,
the flexible cord is secured to the polarizer and the top cover by a first pressure plate.
4. The satellite based satellite deployable helical antenna of claim 3,
the spiral vibrator is fixed to the top cover through the second pressing plate, and the spiral vibrator is fixed to the polarizer through the pressing seat and the third pressing plate, wherein the first pressing plate is made of metal, and the pressing seat and the third pressing plate are made of insulating materials.
5. The satellite-borne satellite deployable helical antenna of any of claims 1-4,
the spiral vibrator is made of copper alloy wires or stainless steel wires.
6. A method of making the satellite-borne satellite deployable helical antenna of any one of claims 1-5, comprising:
the method comprises the steps of fixing the positions of a plurality of spiral vibrators through a preset positioning tool, converting the state of the spiral vibrators from a free state to a working state, binding and fixing the spiral vibrators by using flexible ropes in the state to form a whole, namely a spiral vibrator assembly, wherein the shape of the preset positioning tool is matched with the whole shape of the spiral vibrator assembly;
and fixing the two ends of the spiral vibrator and the flexible rope with fixed relative positions on a polarizer and a top cover, electrically connecting the spiral vibrator on the top cover, and electrically connecting the spiral vibrator with a circuit in the polarizer on the polarizer.
7. The method of claim 6, wherein the step of providing the first layer comprises,
the preset positioning tool is cylindrical, a spiral groove is machined in a preset position on the cylinder, the size of the spiral groove is identical to the working state size of the spiral vibrator, cylinder materials are removed at the position corresponding to the flexible rope, wire binding and glue dispensing operations are carried out, and the spiral vibrator is fixed with the position of the flexible rope through the wire binding and glue dispensing operations.
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| CN114678676B (en) * | 2022-04-22 | 2023-02-14 | 西安电子科技大学 | Satellite-borne spiral antenna unfolding structure based on opening circular tube |
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