CN214203956U

CN214203956U - Adjustable broadband antenna with built-in empennage and control surface compatible

Info

Publication number: CN214203956U
Application number: CN202023014052.4U
Authority: CN
Inventors: 刘卫沪; 吕弘; 刘克欣; 杨晨光; 周双根; 邓攀; 孙运河
Original assignee: No 60 Institute of Headquarters of General Staff of PLA
Current assignee: No 60 Institute of Headquarters of General Staff of PLA
Priority date: 2020-12-15
Filing date: 2020-12-15
Publication date: 2021-09-14
Anticipated expiration: 2030-12-15

Abstract

The utility model discloses an adjustable broadband antenna with a built-in empennage and a control surface compatible, which comprises an upper arm, a lower arm and a support frame; a square groove is formed in the middle of the bottom of the upper arm, a boss is arranged at the lower part of the square groove, a through hole is formed in the middle of the boss, a clamping groove corresponding to the upper arm is formed above the supporting frame, the bottom of the upper arm is clamped into the clamping groove, and through holes are formed in the middle of the supporting frame and the middle of the lower arm; the feeder line penetrates through a through hole in the middle of the lower arm, and the inner conductor of the feeder line sequentially penetrates through holes in the support frame and the upper arm and is welded with the upper arm at a boss at the lower part of the square groove; the feeder line passes through the middle through hole of the lower arm, and the outer conductor of the feeder line is welded with the lower arm at the welding groove at the top of the lower arm. The antenna is simple in structure, compact in size and adjustable, the upper arm body can be cut according to the shape of the control surface, and the requirement of rapid iterative design is met.

Description

Adjustable broadband antenna with built-in empennage and control surface compatible

Technical Field

The utility model belongs to the technical field of the machine carries the antenna, specifically a compatible adjustable broadband antenna of built-in fin and control surface.

Background

The airborne antenna is used as communication equipment of an airplane, has strict requirements on the performance of the communication equipment, and has requirements on the size structure of the antenna due to the structural characteristics of the airplane. The common forms of the current airborne antenna are an exposed antenna and a built-in antenna. The exposed antenna has better omni-directionality, but the exposed part of the antenna affects the aerodynamic performance and the stealth performance of the airplane. In order to weaken the influence of the antenna on the aerodynamics of the airplane, a common mode is to add a tail bracket at the tail part of the airplane and place the antenna in the tail bracket, but the additionally added tail bracket still has certain influence on the aerodynamics of the airplane and increases the air resistance of the airplane; and the reflection area of the airplane on the radar is increased due to the fact that the antenna is exposed.

It is desirable to place the antenna in an existing structure of the aircraft, such as a tail fin built into the aircraft. In order to ensure the maneuverability of the aircraft, the empennage of the aircraft is generally provided with a control surface. When higher steering efficiency is pursued, the area of the steering surface needs to be increased, and the installation space of the built-in antenna is squeezed at the moment. Thus, the internal tail antenna cannot adopt a symmetrical structure as a conventional airborne antenna. The antenna structure must be designed for compatibility to meet the compatibility requirements with the tail control surface.

The airplane system is complex and the technology intensity is extremely high. Multiple iterations are required during the design phase. In order to speed up the design progress, it is urgently needed that an airborne antenna has adjustability and can accommodate local correction of the peripheral structure of the antenna within a certain range. In order to meet the requirements of frequency hopping and spread spectrum communication systems, airborne antenna systems, particularly unmanned aerial vehicles, need to have broadband characteristics.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that to prior art not enough, provide one kind with rudder compatible machine carries antenna, place perpendicular fin in the antenna, can not influence the aerodynamic performance and the stealthy performance of aircraft to solve general antenna structure too the symmetry can't with the complicated rudder compatible problem of fin.

In order to solve the technical problem, the utility model discloses the technical scheme who takes as follows:

an adjustable broadband antenna with a built-in empennage and a control surface compatible comprises an upper arm, a lower arm and a support frame; a square groove is formed in the middle of the bottom of the upper arm, a boss is arranged at the lower part of the square groove, a through hole is formed in the middle of the boss, a clamping groove corresponding to the upper arm is formed above the supporting frame, the bottom of the upper arm is clamped into the clamping groove, and through holes are formed in the middle of the supporting frame and the middle of the lower arm; the feeder line penetrates through a through hole in the middle of the lower arm, and the inner conductor of the feeder line sequentially penetrates through holes in the support frame and the upper arm and is welded with the upper arm at a boss at the lower part of the square groove; the feeder line passes through the middle through hole of the lower arm, and the outer conductor of the feeder line is welded with the lower arm at the welding groove at the top of the lower arm.

Specifically, threaded holes are formed in the front and the rear of the support frame, corresponding through holes are formed in the lower portion of the upper arm, and the upper arm is fixedly connected to the support frame through a set of fastening screws.

Further, the upper arm comprises an upper arm main body and an adjusting branch knot, and the adjusting branch knot is located at the top of the upper arm main body. The upper arm main body can be cut according to the shape of the control surface, so that the antenna installation and the occupied space of the control surface are compatible, the problem of coordination between the mechanical property and the electromagnetic property of the empennage is solved, and the antenna can be arranged in the empennage.

Specifically, a through hole is formed in the side face of the support frame, a corresponding threaded hole is formed in the upper portion of the lower arm, and the lower arm is fixedly connected to the support frame through a set of fastening screws.

Specifically, the feeder line penetrates through a middle through hole of the lower arm and is arranged in the lower arm main body, and the lower arm cover plate is fixedly connected to the lower arm main body through a group of fastening screws.

Preferably, the upper arm and the lower arm are both in a plate-shaped structure, and the thickness of the upper arm is far lower than that of the lower arm. The upper arm and the lower arm of the antenna adopt a plate-shaped structure, so that the antenna has broadband characteristics. The upper arm and the lower arm are combined by adopting a corner cut design, so that the bandwidth of the antenna is further widened. And the requirement of airplane broadband communication is met.

Specifically, the antenna is arranged in the airplane tail wing, and hard foam plastic is filled between the antenna and the airplane tail wing; the bottom of the airplane empennage is provided with a metal structural member for enhancing the strength of the airplane empennage, and the antenna is arranged above the metal structural member.

Compared with the traditional airborne antenna, the upper arm and the lower arm of the airborne antenna are asymmetric. The upper arm can carry out corresponding adjustment according to the control plane structure, satisfies antenna installation space and control plane compatible demand. And the thickness of the upper arm of the antenna is far lower than that of the lower arm, so that the antenna can adapt to the characteristics of narrow upper part and wide lower part of the tail space.

Has the advantages that:

the antenna is simple in structure, compact in size and adjustable, the upper arm body can be cut according to the shape of the control surface, and the requirement of rapid iterative design is met. Meanwhile, the antenna is a broadband antenna, and meets the requirements of frequency hopping and spread spectrum communication systems. Especially, be fit for such as unmanned aerial vehicle this kind of small and exquisite aircraft and carry, effectively solved the compatible problem between fin mechanical properties and the electromagnetic property, can arrange the antenna in the aircraft fin inside, can not additionally increase the reflection area of radar, guarantee the stealthy performance of aircraft, have good use and popularization effect.

Drawings

These and/or other advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings and the following detailed description.

Fig. 1 is a schematic diagram of the overall structure of an unmanned aerial vehicle empennage;

FIG. 2 is a schematic view of the built-in tail and control surface compatible broadband tunable antenna and aircraft tail mounting structure;

FIG. 3 is a schematic structural diagram of the broadband tunable antenna with built-in empennage and rudder surface compatibility;

FIG. 4 is a schematic diagram of the structure of the upper arm of the antenna;

fig. 5 is a schematic structural view of the lower arm of the antenna.

Fig. 6 is a simulation diagram of the standing wave ratio of the antenna.

Wherein each reference numeral represents: 1. an unmanned aerial vehicle body; 2. an airplane tail; 3. a control surface; 4. the built-in empennage and the control surface are compatible with a broadband adjustable antenna; 5. an upper arm; 6. a lower arm; 7. rigid foams; 8. a metal structural member; 9. adjusting branch knots; 10. an upper arm body; 11. a square groove; 12. a boss; 13. a support frame; 14. a lower arm main body; 15. a lower arm cover plate; 16. a lower arm welding groove; 17. fastening a first screw; 18. a second fastening screw; 19. fastening a screw III; 20. fastening a screw II; 21. fastening a screw V; 22. fastening a screw six; 23. a fastening screw seventh; 24. fastening a screw eighth; 25. a ninth fastening screw; 26. ten fastening screws; 27. eleven fastening screws; 28. fastening screws twelve; 29. fastening screws thirteen; 30. fourteen fastening screws; 31. a fastening screw fifteen; 32. and sixthly, fastening screws.

Detailed Description

The invention will be better understood from the following examples.

The drawings in the specification show the structure, ratio, size, etc. only for the purpose of matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and not for the purpose of limiting the present invention, so the present invention does not have the essential meaning in the art, and any structure modification, ratio relationship change or size adjustment should still fall within the scope covered by the technical content disclosed in the present invention without affecting the function and achievable purpose of the present invention. Meanwhile, the terms "upper", "lower", "front", "rear", "middle", and the like used in the present specification are for the sake of clarity only, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof are also considered to be the scope of the present invention without substantial changes in the technical content.

Referring to fig. 3-5, the broadband adjustable antenna 4 with the built-in empennage and control surface compatible comprises an upper arm 5, a lower arm 6 and a support frame 13; the centre of upper arm 5 bottom is provided with square groove 11, and the lower part in square groove 11 is provided with boss 12, and the middle part of boss 12 has the through-hole, and the draw-in groove that corresponds with upper arm 5 is seted up to support frame 13 top, and in the draw-in groove was gone into to the bottom card of upper arm 5, the through-hole had all been seted up at the middle part of support frame 13 and underarm 6. The feeder line passes through a through hole in the middle of the lower arm 6, and the inner conductor of the feeder line sequentially passes through holes in the support frame 13 and the upper arm 5 and is welded with the upper arm 5 at a boss at the lower part of the square groove 11.

The feed line passes through the central through hole of the lower arm 6 and the feed line outer conductors are welded together at the lower arm weld groove 16.

Threaded holes are formed in the front and rear of the support frame 13, corresponding through holes are formed in the lower portion of the upper arm 5, and the upper arm 5 is fixedly connected to the support frame 13 through a first fastening screw 17 and a second fastening screw 18. The side surface of the support frame 13 is also provided with a through hole, the upper part of the lower arm 6 is provided with a corresponding threaded hole, and the lower arm 6 is fixedly connected to the support frame 13 through a third fastening screw 19, a fourth fastening screw 20, a fifth fastening screw 21 and a sixth fastening screw 22. After the feeder passes through the central through hole of the lower arm 6, the feeder is placed in the lower arm main body 14, and then the lower arm cover 15 is fixedly attached to the lower arm main body 14 by using a fastening screw seven 23, a fastening screw eight 24, a fastening screw nine 25, a fastening screw ten 26, a fastening screw eleven 27, a fastening screw twelve 28, a fastening screw thirteen 29, a fastening screw fourteen 30, a fastening screw fifteen 31, and a fastening screw sixteen 32.

The groove above the boss is a square groove 11. The upper arm 5 and the lower arm 6 each have a plate-like structure in order to provide the antenna with a broadband characteristic. The upper arm 5 is much thinner than the lower arm 6 in order to adapt to the thin-top and thick-bottom characteristics of the aircraft tail 2 in space.

The utility model discloses in, upper arm 5 adopts adjustable structure for antenna installation and control surface occupation space are both compatible.

As shown in fig. 1 and 2, the internal tail and control surface compatible broadband adjustable antenna 4 is internally arranged on the airplane tail 2, and rigid foam 7 is filled between the internal tail and control surface compatible broadband adjustable antenna 4 and the airplane tail 2. The bottom of the airplane empennage 2 is provided with a metal structural part 8 for strengthening the strength of the airplane empennage, and the built-in empennage and control surface compatible broadband adjustable antenna 4 is arranged above the metal structural part 8.

The broadband adjustable antenna 4 with the built-in empennage and control surface compatible comprises an upper arm main body 10, adjusting branches 9, a lower arm 6 and a support frame 13. The upper arm body 10 and the lower arm 6 mainly function to radiate and receive electromagnetic waves. In order to be compatible with the control surface 3, a reasonable tangent processing is required for the upper arm body 10. The adjusting branches 9 on the top of the upper arm main body 10 can make up the defects of the radiation performance of the upper arm 5 caused by the tangent operation. The upper arm 5 and the lower arm 6 both adopt a plate-shaped structure, and the broadband characteristic of the antenna is realized. The corner cut structure of the joint of the upper arm 5 and the lower arm 6 further expands the bandwidth of the antenna. The support frame 13 is located between the upper arm 5 and the lower arm 6 and is located in the middle of the upper arm 5 and the lower arm 6, and mainly used for supporting and positioning the upper arm 5 and the lower arm 6 and positioning a feeding point.

Referring to the attached figure 6, the antenna standing-wave ratio simulation diagram is verified through performance tests, ground simulation environment tests and flight experiments, requirements of the unmanned aerial vehicle can be completely met, and the technology can be popularized and applied to antennas with other structural forms.

The utility model provides a thought and method of built-in fin and compatible adjustable broadband antenna of control surface specifically realize that this technical scheme's method and approach are many, above only the utility model discloses a preferred embodiment should point out, to ordinary technical personnel in this technical field, is not deviating from the utility model discloses under the prerequisite of principle, can also make a plurality of improvements and moist decorations, these improve and moist decorations should also regard as the utility model discloses a protection scope. All the components not specified in the present embodiment can be realized by the prior art.

Claims

1. An adjustable broadband antenna with a built-in empennage and a control surface compatible is characterized by comprising an upper arm (5), a lower arm (6) and a support frame (13); a square groove (11) is formed in the middle of the bottom of the upper arm (5), a boss (12) is arranged on the lower portion of the square groove (11), a through hole is formed in the middle of the boss (12), a clamping groove corresponding to the upper arm (5) is formed above the supporting frame (13), the bottom of the upper arm (5) is clamped into the clamping groove, and through holes are formed in the middle of the supporting frame (13) and the middle of the lower arm (6); the feeder line penetrates through a middle through hole of the lower arm (6), an inner conductor of the feeder line sequentially penetrates through holes in the support frame (13) and the upper arm (5), and is welded with the upper arm (5) at a boss (12) at the lower part of the square groove (11); the feeder line penetrates through a through hole in the middle of the lower arm (6), and an outer conductor of the feeder line is welded with the lower arm (6) at a welding groove (16) in the top of the lower arm.

2. The built-in empennage and control surface compatible adjustable broadband antenna according to claim 1, characterized in that threaded holes are formed in the front and back of the support frame (13), corresponding through holes are formed in the lower portion of the upper arm (5), and the upper arm (5) is fixedly connected to the support frame (13) through a set of fastening screws.

3. The internal tail and control surface compatible adjustable broadband antenna according to claim 1, characterized in that the upper arm (5) comprises an upper arm body (10) and an adjustment stub (9), the adjustment stub (9) being located on top of the upper arm body (10).

4. The internal empennage and control surface compatible adjustable broadband antenna according to claim 1, wherein a through hole is formed in the side surface of the support frame (13), a corresponding threaded hole is formed in the upper portion of the lower arm (6), and the lower arm (6) is fixedly connected to the support frame (13) through a set of fastening screws.

5. The broadband antenna with the built-in empennage and rudder surface compatible and adjustable according to claim 1, wherein the feeder passes through a through hole in the middle of the lower arm (6) and is placed in the lower arm main body (14), and the lower arm cover plate (15) is fixedly connected to the lower arm main body (14) through a set of fastening screws.

6. The internal tail and control surface compatible adjustable broadband antenna according to claim 1 is characterized in that the upper arm (5) and the lower arm (6) are of plate-shaped structures, and the thickness of the upper arm (5) is far lower than that of the lower arm (6).

7. The built-in empennage and control surface compatible adjustable broadband antenna according to claim 1, characterized in that the antenna is built-in the empennage (2) of the airplane, and the space between the empennage (2) of the airplane is filled with rigid foam (7); the bottom of the airplane empennage (2) is provided with a metal structural part (8) for strengthening the strength of the airplane empennage, and the antenna is placed above the metal structural part (8).