WO2017161959A1 - 固定多波束螺旋天线立体阵及其螺旋天线柔性支撑装置 - Google Patents

固定多波束螺旋天线立体阵及其螺旋天线柔性支撑装置 Download PDF

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Publication number
WO2017161959A1
WO2017161959A1 PCT/CN2017/071578 CN2017071578W WO2017161959A1 WO 2017161959 A1 WO2017161959 A1 WO 2017161959A1 CN 2017071578 W CN2017071578 W CN 2017071578W WO 2017161959 A1 WO2017161959 A1 WO 2017161959A1
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WO
WIPO (PCT)
Prior art keywords
helical antenna
antenna
flexible support
helical
top surface
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Application number
PCT/CN2017/071578
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English (en)
French (fr)
Chinese (zh)
Inventor
张健军
庄园
李洪星
吴小丹
刘伟亮
魏文超
胡浩
黄奕
双小川
张开创
Original Assignee
上海航天测控通信研究所
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Application filed by 上海航天测控通信研究所 filed Critical 上海航天测控通信研究所
Priority to EP17769236.5A priority Critical patent/EP3316397B1/de
Publication of WO2017161959A1 publication Critical patent/WO2017161959A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/14—Supports; Mounting means for wire or other non-rigid radiating elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/362—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith for broadside radiating helical antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q11/00—Electrically-long antennas having dimensions more than twice the shortest operating wavelength and consisting of conductive active radiating elements
    • H01Q11/02—Non-resonant antennas, e.g. travelling-wave antenna
    • H01Q11/08—Helical antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
    • H01Q21/20—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a curvilinear path
    • H01Q21/205—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a curvilinear path providing an omnidirectional coverage

Definitions

  • the invention relates to a helical antenna array, in particular to a fixed multi-beam helical antenna stereo array with a folding and unfolding function and a helical antenna flexible supporting device.
  • a helical antenna is an antenna widely used in the field of aerospace. Compared with the microstrip antenna commonly used in array antennas, multi-turn axial mode single-wire helical antennas have pattern bandwidth, circular polarization, and directional symmetry. The direction is obviously dominant. Therefore, using a single-wire helical antenna as an array element can greatly reduce the number of array elements of a small antenna array while maintaining the antenna antenna gain constant. In order to increase the gain, the single-wire helical antenna usually has a large number of turns and thus has a high height. The use of a compression-release device can greatly reduce the height of the antenna in a non-operating state, and is particularly suitable for large-scale applications at low frequencies.
  • the gain decreases rapidly when scanning to a large angle.
  • the number of array elements needs to be increased, which in turn leads to narrowing of the array beam. .
  • a larger number of wave positions are required to cover the required range of viewing angles, resulting in a geometric increase in the number of feeder networks.
  • the antenna array is designed as a three-dimensional structure, by changing the physical orientation of the array, the antenna array can work without scanning angle or small scanning angle, thereby avoiding excessive increase of the number of array elements and reducing the scale of the feeding network.
  • a single-wire helical antenna can achieve a gain of no less than 10 dB in at least 10% of the bandwidth, and is required for a fixed multi-beam antenna that requires a gain coverage of 8 dB or more over a large coverage (eg, ⁇ 65°).
  • a three-dimensional antenna array scheme in which a single-wire helical antenna is an array element is very suitable. According to the specific gain coverage requirements, the structure of the stereo array is designed such that each antenna points to a different orientation, and the final beam coverage requirement is achieved by arranging a series of different antennas on the structure.
  • the object of the present invention is to provide a fixed multi-beam helical antenna stereo array with a folding and unfolding function and a helical antenna flexible supporting device thereof, so as to solve the problem that the existing planar helical antenna array has a large gain when scanning to a large angle. And increasing the number of elements leads to the problem of narrowing the array beam.
  • a second object of the present invention is to provide a fixed multi-beam spiral having a folding and unfolding function.
  • the antenna stereo array and the helical antenna flexible supporting device realize the setting of the fixed multi-beam antenna with wide field of view coverage to meet the functional requirements of the antenna, and introduce the antenna folding and unfolding function, so as to realize the size envelope and weight of the antenna. Effective control.
  • the present invention provides a fixed multi-beam helical antenna stereo array, comprising a helical antenna unit and a frustum structure, the frustum structure comprising a top surface and a plurality of side surfaces, the upper end of the side surface and the The edge of the top surface is connected, the side of the side is connected to the side of the adjacent side, and the spiral antenna unit is respectively disposed on the top surface and the side surface, and the spiral antenna unit includes a spiral antenna and a flexible Supporting wires, the bottoms of the helical antennas of the respective helical antenna units are respectively mounted on the top surface and the side surface, and the plurality of flexible support wires arranged in parallel are evenly distributed around the spiral antenna, and the flexible support wire is disposed along the The axial arrangement of the helical antenna is described to support the helical antenna.
  • the top surface is a regular polygon
  • the side surface is an isosceles trapezoid
  • the upper end of the side surface is connected to the edge of the top surface, and the side edges of the side surface are adjacent to the side edges of the adjacent side surfaces. connection.
  • the diameter of the circumscribed circle of the top surface is about 0.7 to 0.8 times the operating wavelength of the antenna of the helical antenna unit.
  • the bottom surface further comprises a bottom surface having the same regular polygon shape as the top surface, but the area of the bottom surface is larger than the top surface, and each side of the bottom surface is respectively connected to the bottom side of the side surface.
  • the two adjacent sides are connected by the side brackets, the side and the top surface are connected by the upper bracket, and the lower side of the side is provided with the lower bracket, and the upper bracket, the side bracket and the lower bracket constitute the support of the frustum structure frame.
  • the helical antenna unit further includes a dielectric plate, a bottom of the spiral antenna is mounted on the dielectric plate, the dielectric plate is disposed on the top surface and the side surface, and the dielectric plate is made of an insulating material. to make.
  • the helical antenna unit further comprises a pitch fine adjustment device, and the flexible support wire is connected to each layer of the helical antenna by the pitch fine adjustment device.
  • the edge of the top surface connected to the side surface and the edge of each of the two adjacent side surfaces are respectively provided with a beam isolation plate, and the beam isolation plate is a metal plate or a metal mesh.
  • the height of the beam isolation plate is 0.3 to 0.4 times the operating wavelength of the antenna of the helical antenna unit.
  • the beam isolation plate is obliquely mounted on the edge and equally divides the space between the two faces of the frustum structure in which the edge is located.
  • the beam isolation plate when configured as a metal plate, the beam isolation plate is provided with a lightening hole, wherein the diameter of the weight reduction hole is not more than 0.1 times the working wavelength of the antenna of the helical antenna unit;
  • the beam isolation plate is a metal mesh, the beam isolation plate has a plurality of metal meshes, wherein the diameter of the metal mesh is not more than 0.1 times the operating wavelength of the antenna of the helical antenna unit.
  • the present invention also provides a helical antenna flexible support device, the flexible support device comprising a spiral antenna, a dielectric plate, a medium base, a parallel flexible support wire and a pitch fine adjustment device;
  • the bottom of the helical antenna is mounted on the dielectric plate by a plurality of media bases, and the plurality of media bases are circumferentially uniform;
  • a plurality of flexible support wires axially evenly distributed around the helical antenna, and the flexible support wires are disposed along an axial direction of the helical antenna; the flexible support wires and the spiral antenna are separated by a pitch between each layer Fine-tuning device connection.
  • the bottom of the helical antenna is fixed to the dielectric plate by three non-equal media bases.
  • the helical antenna is surrounded by three flexible support wires.
  • the dielectric plate and the dielectric base are made of an insulating material.
  • the flexible support wire is composed of a high strength insulated wire.
  • the pitch fine adjustment device includes an adjustment block, the adjustment block is fixed on the spiral antenna, the flexible support wire is disposed in the adjustment block, and the adjustment block is along the flexible The axial movement of the support wire is finely adjusted to achieve fine pitch adjustment.
  • the helical antenna is mounted on the dielectric plate and the plurality of flexible support wires, and the helical antenna is in a non-fully released state.
  • a screw connector is connected to the bottom end of the spiral antenna, and the dielectric board is fixed on an adapter board.
  • the present invention also provides a helical antenna flexible supporting device, comprising a helical antenna and a parallel flexible supporting wire, wherein the plurality of flexible supporting wires arranged in parallel are evenly distributed around the helical antenna, and the flexible supporting wire is along The axial arrangement of the helical antenna is described to support the helical antenna.
  • a dielectric plate is further included, and a bottom of the spiral antenna is mounted on the dielectric plate, and the dielectric plate is made of an insulating material.
  • a media base is further included, the bottom of the spiral antenna being mounted on the media plate by a plurality of the media bases, the media bases being circumferentially uniform and made of an insulating material.
  • a pitch fine adjustment device is further included, and the flexible support wire is connected to each layer of the helical antenna by the pitch fine adjustment device.
  • the invention realizes the beam deflection of the antenna beam by using the stereo frustum structure, thereby realizing beam coverage of the airspace in a wider viewing angle. Compared with the conventional phased array antenna, the design does not need to use a phase shifting feed network, which can greatly save costs;
  • the present invention utilizes a three-dimensional frustum structure to realize high-gain multi-beam coverage of the antenna, thereby realizing spatial domain division under the condition of ensuring full coverage of wide-area airspace, and reducing the number of targets in a single beam, which is greatly reduced compared with the conventional antenna.
  • the processing capacity of a single channel increases the probability of detection;
  • the invention utilizes the beam isolation plate to reduce mutual coupling between the antenna elements, and can greatly reduce the size of the three-dimensional frustum structure compared with the method of relying solely on space isolation; the isolation plate can reduce or decrease the weight, which can affect the electricity. Reduce the weight on the premise of performance;
  • the invention realizes the control of the pitch and rigidity of the helical antenna by utilizing the restoring force of the spiral antenna and the unidirectional support characteristic of the flexible wire, thereby realizing the flexible support of the helical antenna, and the design structure is compared with the conventional helical antenna hard support device.
  • the weight of the helical antenna device is greatly reduced, and the screw compression release can be realized, thereby greatly reducing the installation space of the helical antenna;
  • the single-wire helical antenna used in the present invention can achieve ⁇ 25° in-beam 8dB gain coverage in a bandwidth of 12%, which is superior to the conventional microstrip antenna array scheme in terms of electrical performance, cost and weight;
  • the device of the invention has simple structure, convenient assembly and high promotion value.
  • FIG. 1 is a schematic structural view of a frustum of a fixed multi-beam helical antenna stereo array in a 7-beam application according to the present invention
  • FIG. 2 is a schematic structural diagram of a solid state of a fixed multi-beam helical antenna stereo array in a 7-beam application according to the present invention
  • FIG. 3 is a schematic structural diagram of a closed state of a fixed multi-beam helical antenna stereo array in a 7-beam application;
  • FIG. 4 is a simulation diagram of beam coverage of a fixed multi-beam helical antenna stereo array in a 7-beam application according to the present invention, wherein the contour line has an 8 dB gain and the operating frequency is f 1 ;
  • FIG. 5 is a simulation diagram of beam coverage of a fixed multi-beam helical antenna stereo array in a 7-beam application according to the present invention, wherein the contour is 8 dB gain, and the operating frequency is f 2 , f 1 ⁇ 1.1 f 2 ;
  • FIG. 6 is a schematic structural view of a helical antenna flexible support device provided by the present invention.
  • Figure 7 is a schematic view showing the connection between the flexible support wire and the helical antenna in the present invention.
  • the embodiment provides a multi-beam helical antenna stereo array, which includes a frustum structure 10 and a plurality of helical antenna units 20.
  • the frustum structure 10 includes a top surface 11 and a plurality of side surfaces 12. The upper end of the side surface 12 is connected to the edge of the top surface 11, and the side edges of the side surface 12 are connected to the side edges of the adjacent side surface 12.
  • the frustum structure 10 The top surface 11 and the side surface 12 are respectively provided with a helical antenna unit 20, and the helical antenna unit 20 is fixedly mounted on the top surface and the side surface, respectively.
  • the frustum structure 10 formed by the top surface 11 and the side surface 12 is the main structure for supporting the respective helical antenna units 20, and at the same time, since the respective faces of the frustum structure 20 themselves are different from each other, the top surface is mounted on the top surface.
  • the antenna beam directions of the helical antenna elements on the side are different. Therefore, the multi-beam helical antenna stereo array realizes the directional deflection of the antenna beam of the helical antenna unit by using a three-dimensional frustum structure, thereby realizing beam coverage of the airspace in a wider viewing angle, compared with the conventional phased array antenna.
  • the antenna stereo array does not need to use a phase shifting feed network, which can greatly save this.
  • the top surface 11 is arranged as a regular polygon. As shown in Fig. 1, the top surface 11 in this embodiment is a regular hexagon.
  • the side faces 12 are arranged in an isosceles trapezoid, the upper ends of the side faces 12 are connected to the edges of one side of the top face 11, and the sides of the side faces 12 are connected to the sides of the adjacent side faces.
  • the top surface 11 of the regular hexagon is coupled with the side 12 of the six isosceles trapezoids to form a frustum structure.
  • the overall structure of the frustum structure having six side edges and six upper edges is stable and can be stably Support each spiral antenna unit.
  • the top surface is not limited to a positive six-deformation, and other polygons such as a regular quadrilateral, a pentagon, a heptagon, an octagon, and the like may be provided as needed.
  • the top surface of the regular polygon cooperates with the side of the isosceles trapezoid to form a uniform frustum structure with the same sides, so that the antenna beam of the helical antenna unit on each side has a uniform and identical orientation with respect to the helical antenna element of the top surface.
  • the deflection is also the same, and the pointing deflection between the antenna beams of the helical antenna elements on each side is also the same, so that uniform beam coverage in a wide viewing angle can be achieved.
  • the diameter of the circumcircle of the top surface of the regular polygon is set to any value between 0.7 times, 0.8 times, or 0.7 to 0.8 times the antenna operating wavelength of the helical antenna unit. It is preferably set here to be 0.75 times the operating wavelength of the antenna of the helical antenna unit.
  • the top surface of such a size can make the deflection of the antenna beam of the helical antenna unit on each side with respect to the helical antenna unit of the top surface suitable for the beam coverage of each helical antenna unit, so that the beam of each antenna unit can be uniformly expanded. Covers airspace within a larger viewing angle.
  • the frustum structure 10 further includes a bottom surface having the same regular polygonal shape as the top surface, but the bottom surface has an area larger than the top surface, and each side of the bottom surface and the bottom of each side surface respectively The edges are connected.
  • the bottom surface matching side surface and the top surface form an inner space of the frustum structure, so that the inner space of the frustum structure can be installed with various measuring and controlling single machines such as low noise. Therefore, the frustum structure having the bottom surface can be sealed as needed to achieve control of the internal working environment of the frustum structure.
  • each surface of the frustum structure is made of a low-density metal material to meet the rigidity and strength requirements of the frustum structure.
  • the adjacent two sides are connected by side brackets 14, side
  • the face 12 and the top face 11 are connected by the upper bracket 13, and the lower side of the side is provided with a lower bracket 15, and the upper bracket 13, the side bracket 14 and the lower bracket 15 constitute a support frame of the frustum structure 10.
  • the frustum structure is the main support structure of the stereo array of the antenna, and the rigidity and strength requirements can be further satisfied by the arrangement of the support frame.
  • the upper bracket 13 is a regular polygonal structure matching the top surface 11, and correspondingly, the lower bracket 15 is also a regular polygonal structure.
  • the upper bracket 13, the side bracket 14 and the lower bracket 15 bracket are fixedly connected by a fastener.
  • the upper bracket 13, the side bracket 14 and the lower bracket 15 function to connect and fix the top surface and the side surface, and to connect and fix the side surface and the side surface.
  • the lower bracket 15 is a regular polygonal structure matching the bottom surface, and the lower bracket 15 also functions to connect and fix the side surface and the bottom surface.
  • the arrangement of the brackets between the faces serves as a better fixing of the frustum structure and a good support and fixing of the helical antenna elements on the respective faces.
  • by changing the size of the upper bracket 13, the side bracket 14 and the lower bracket 15 and the size of the top surface and the side surface of the corresponding connection it is possible to change each of the three-dimensional array formed by the frustum structure.
  • the purpose of the relative position and angle between the faces is to adjust the angle of the beam of the helical antenna unit on each face, so that the antenna array has better applicability to various performance requirements.
  • the helical antenna unit in the multi-beam helical antenna stereo array includes a helical antenna 21, a plurality of flexible support wires 23 arranged in parallel, and a dielectric plate 22, and a helical antenna 21
  • the bottom portion is mounted on the dielectric plate 22, wherein the dielectric plate 22 at this time is made of an insulating material, and the helical antenna can be directly mounted on the frustum structure made of the above-mentioned metal material through the dielectric plate 22.
  • the respective helical antenna elements of the entire antenna stereo array are respectively mounted on the top surface and the side surface of the frustum structure of the multi-beam helical antenna stereo array through an insulating dielectric plate.
  • the helical antenna unit of the embodiment is supported by the flexible support wire and the dielectric plate, and the support for the helical antenna is realized.
  • the structure is simple, light, easy to operate, and high. Promotion value.
  • a pitch fine adjustment device 24 is further included, a plurality of flexible support wires 23 are evenly distributed around the helical antenna 21, and each flexible support wire 23 is disposed along the axial direction of the helical antenna 21, and is flexible.
  • the support wire 23 is connected to each layer of the helical antenna 21 by a pitch fine adjustment device 24.
  • the flexible support wire here is also made of an insulating material.
  • the flexible support wire only provides tensile force, and thus the respective helical antennas of the helical antenna unit can be It is convenient to compress below the beam isolation board or even lower, thereby reducing the antenna gathering envelope.
  • the helical antenna realizes incomplete expansion of the helical antenna under the interaction of its own restoring force and the flexible supporting wire pulling force.
  • the pitch fine adjustment device between the flexible support wire and the helical antenna realizes fine adjustment of the pitch of the helical antenna, thereby realizing effective control of the rigidity and pitch of the helical antenna.
  • the spiral antenna unit has a folding and unfolding function, has a simple structure, is light in weight, and can realize adjustment of the pitch of the helical antenna and adjustment of rigidity.
  • the support structure of the antenna greatly reduces the weight of the helical antenna device, and can realize the screw compression release, thereby greatly reducing the installation space of the helical antenna.
  • the bottom of the spiral antenna 21 is mounted on the dielectric plate 22 through a plurality of media bases 25, and the plurality of media bases 25 are uniformly distributed circumferentially.
  • the dielectric base 25 is also made of an insulating material.
  • the setting of the medium base can ensure the stability of the spiral antenna after being fixedly mounted on the medium plate, and since the bottom portions of the spiral antenna are not on the same horizontal surface, the plurality of media bases in the present invention are non-equal height, and the media bases are The height is set according to the height of the helical antenna from the dielectric plate at its set position.
  • the dielectric base and dielectric plate of the insulating material do not affect the normal operation of the helical antenna.
  • the edge of the top surface i.e., the edge on which the top surface is joined to the side
  • the side where each two adjacent side surfaces 12 are joined also That is, the beam isolation plate 30 is respectively disposed on the edge of each of the two adjacent side surfaces.
  • the beam isolation plate 30 in this embodiment is a metal plate or a metal mesh.
  • the upper beam isolating plate 31 is fixedly connected to the edge of the top surface and the side surface
  • the side beam isolating plate 32 is fixedly connected on the edge of each of the two adjacent side surfaces.
  • Each beam isolation plate 30 is fixed on the frustum structure by fasteners, and the upper beam isolation plate and the side beam isolation plate are also locked and fixed by fasteners, so that the respective beam isolation plates are tightly connected as a whole.
  • the frustum structure is connected by the upper bracket, the side bracket and the lower bracket, the upper bracket and the side bracket form an edge of the frustum structure, and the beam isolation panel 30 is fixedly disposed on the upper bracket and the side bracket. on.
  • the beam isolation plate also changes as the inclination angle of the edge of the frustum structure changes, thereby adapting between the helical antennas of different angles.
  • Beam isolation Multi-beam snail
  • the stereo array of the rotating antenna can effectively reduce the mutual coupling between the antenna elements by using the beam isolation plate, and the size of the stereo frustum structure can be greatly reduced compared with the method of relying solely on the space isolation.
  • the height of the beam isolation plate 30 is set to be 0.3 to 0.4 times the operating wavelength of the antenna of the helical antenna unit, and the height is preferably set to 0.375 times the operating wavelength of the antenna.
  • the above-mentioned beam isolating plate 30 is obliquely mounted on each of the above-mentioned edges, and its mounting angle is set to equally divide the space between the two faces of the frustum structure 10 in which the respective edges are located. It is particularly noted that the edges here do not include the portion of the frustum structure that is connected to the bottom surface or the lower bracket, that is, the sides of the bottom surface of the frustum structure need not be provided with isolation means.
  • the beam isolation plate 30 When the beam isolation plate 30 is configured as a metal plate, the beam isolation plate is provided with a lightening hole, wherein the diameter of the lightening hole is not more than 0.1 times the operating wavelength of the antenna of the helical antenna unit 20.
  • the beam isolation plate 30 When the beam isolation plate 30 is a metal mesh, it has a plurality of metal meshes, wherein the diameter of the metal mesh is not more than 0.1 times the operating wavelength of the antenna of the helical antenna unit 20. Opening a lightening hole on the beam isolation plate or setting the beam isolation plate to a metal mesh with a metal mesh can reduce the weight without affecting the electrical performance.
  • FIG. 5 a beam coverage simulation diagram of a fixed multi-beam helical antenna stereo array of the present invention in a 7-beam application, wherein the contour is 8 dB gain, and the operating frequency is f 2 , f 1 ⁇ 1.1*f 2 .
  • the antenna of the antenna provided by the present invention has a large coverage range of the beam, and the overlapping area between the beams is small, and the antenna works well.
  • the single-wire helical antenna used in the present invention can achieve ⁇ 25° in-beam 8dB gain coverage in a 12% bandwidth, which is superior to the conventional microstrip antenna array scheme in terms of electrical performance, cost and weight.
  • the fixed multi-beam helical antenna stereo array with the extended function provided by the invention can be used for simultaneously receiving multiple signals from a large viewing angle.
  • the utility model has the advantages of low cost, light weight and folding and unfolding function.
  • the stereo array of the antenna realizes beam coverage for airspace in a wide viewing angle, and has a very high High application promotion value.
  • the present invention also provides a helical antenna flexible support device, which can be used as the helical antenna unit of the fixed multi-beam helical antenna stereo array described above, or as a spiral antenna alone.
  • Line flexible support device The device is composed of a dielectric plate 22, a plurality of media bases 25, a plurality of flexible support wires 23, and the like.
  • the spiral antenna supporting device provided by the invention has the advantages of simple structure, light weight, and adjustable screw pitch and rigidity adjustment.
  • the bottom of the helical antenna 21 is fixed on the dielectric plate 22 by a plurality of media bases 25, and the plurality of media bases 25 are circumferentially evenly distributed to ensure the stability of the fixed configuration of the helical antenna 21; since the bottom portions of the helical antenna 21 are not in the same horizontal plane Therefore, in the present invention, the plurality of media bases 25 are non-equal, and the height of each of the media bases 25 is set according to the height of the helical antenna 21 from the dielectric plate 22 at the set position.
  • the dielectric plate 22 and the dielectric base 25 are all made of an insulating material, thereby preventing the dielectric plate 22 and the dielectric base 25 from affecting the normal operation of the helical antenna 21.
  • the bottom of the helical antenna 21 is mounted on the dielectric plate 22 through three media bases 25; of course, the number of the media bases 25 can also be four, five, etc., which can be set according to specific conditions. There are no restrictions here.
  • a plurality of flexible support wires 23 are circumferentially evenly distributed around the helical antenna 21, and each of the flexible support wires 23 is axially disposed.
  • the number of the flexible support wires 23 can be designed according to specific conditions, such as Three flexible support wires 23 are provided as shown in Fig. 6, and five, six, etc. may be provided, which are not limited herein.
  • the flexible support wire 23 acts as an axial support for the helical antenna 21.
  • the flexible support wire 23 is composed of a high-strength insulated wire.
  • each flexible support wire 23 and each layer of the helical antenna 21 are also connected by a pitch fine adjustment device 24 such that each layer of the helical antenna 21 can pass through the pitch fine adjustment device 24 with respect to the flexible support wire 23.
  • the axial nudge is adjusted to achieve adjustment of the pitch between each layer of the helical antenna 21 (i.e., the pitch of the helical antenna 21), thereby achieving precise control of the pitch of the helical antenna 21.
  • the pitch of the helical antenna 21 in the natural state needs to be larger than the required pitch (that is, the pitch after the helical antenna 21 is mounted on the supporting device); the pitch of the helical antenna 21 is restricted to the required pitch by the flexible supporting wire 23, thereby ensuring the spiral
  • the antenna 21 is always in a non-completely released state.
  • the helical antenna 21 itself has a certain restoring force; under the interaction of the restoring force of the helical antenna 21 and the binding force of the flexible supporting wire 23, the helical antenna 21 is realized. The control of the stiffness.
  • the design or strength selection of the medium base 25 and the flexible support wire 23 is required to be able to withstand the impact of the compression and release moment of the helical antenna 21.
  • the pitch fine adjustment device 24 includes an adjustment block 241.
  • the adjustment block 241 is fixed on the helical antenna 21, and the flexible support wire 23 is disposed in the adjustment block 241, and the adjustment block 241 can be along
  • the axial support of the flexible support wire 23 causes fine adjustment of the pitch; when the pitch is adjusted, the fixing between the adjustment block 241 and the flexible support wire 23 is realized by the form of the adhesive dispensing.
  • the specific structure of the pitch fine adjustment device 24 is not limited to the above, and may be adjusted according to specific conditions, and is not limited herein.
  • an RF connector (abbreviation: SMA, the same below) connector 26 is connected to the end of the bottom of the helical antenna 21, and one end of the SMA connector is connected to the transceiver to realize the transmission and reception control of the helical antenna signal.
  • the other end is fixedly connected to the end of the helical antenna 1 by means of welding or a joint.
  • the dielectric plate 22 is further fixed to an adapter plate 27 to realize mechanical fixing of the helical antenna platform.
  • the shape of the adapter plate 27 is determined by an external mounting platform of the helical antenna device, which is not limited herein.
  • the top surface and the side surface of the different-shaped frustum structure can be used as the above-mentioned adapter plate 27.
  • the present invention also provides a helical antenna flexible support device, which can be used as the helical antenna unit of the fixed multi-beam helical antenna stereo array described above, or as a helical antenna flexible support device alone.
  • the device includes a helical antenna and a parallel flexible support wire, a plurality of the flexible support wires disposed in parallel are disposed around the helical antenna, and a flexible support wire is disposed along an axial direction of the helical antenna to support the spiral antenna.
  • the device also known as a helical antenna unit
  • the device is an extension of the helical antenna flexible support device shown in FIG. 6, and can be used alone or as a helical antenna unit of the fixed multi-beam helical antenna stereo array shown in FIG. 2.
  • the various partial structures of the device shown in FIG. 6 can also be used in any combination without any conflict in function and work effect.
  • the helical antenna flexible support device further includes a dielectric plate on which the bottom of the helical antenna is mounted, the dielectric plate being made of an insulating material.
  • the dielectric plate can be set as a separate dielectric plate structure as needed to be mounted on the insulating surface of the frustum structure of the fixed multi-beam helical antenna stereo array or other structure to be mounted with a helical antenna, or a fixed multi-beam helical antenna stereo array.
  • the frustum structure is on the insulating surface.
  • the above-mentioned helical antenna flexible supporting device further comprises a medium base, and the bottom of the spiral antenna is mounted on the dielectric board through a plurality of medium bases, and the medium base is uniformly distributed in the circumferential direction and is made of an insulating material. Since the bottom portions of the spiral antenna 1 are not on the same horizontal surface, the plurality of media bases 5 of the present invention are non-equal, and the height of each of the media bases 5 is set according to the height of the spiral antennas from the dielectric plate 3 at the set position. set.
  • a pitch trimming device is further included, the flexible support wire being connected to each layer of the helical antenna by a pitch fine adjustment device.
  • the flexible support wire and the helical antenna are connected by a pitch fine adjustment device, and the helical antenna's own restoring force and the unidirectional support characteristic of the flexible wire are used to realize the control of the helical antenna stiffness and pitch, compared with the conventional helical antenna hard support device.
  • the design structure greatly reduces the weight of the helical antenna device and can realize the screw compression release, thereby greatly reducing the installation space of the helical antenna.
  • the flexible antenna support device provided by the present invention achieves support and fixation of the helical antenna by the flexible support wire and the dielectric plate, and the structure of the helical antenna support device in the prior art is Simple, light weight, easy to operate, and has a high promotion value; on the other hand, the flexible support wire and the helical antenna are connected by a pitch fine adjustment device, and the self-restoring force of the spiral antenna and the unidirectional support characteristic of the flexible wire are realized.
  • the design of the helical antenna stiffness and the pitch greatly reduces the weight of the helical antenna device and can achieve the screw compression release, thereby greatly reducing the helical antenna. Installation space.

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