Butterfly antenna based on symmetrical dipoles

Abstract

The utility model provides a butterfly antenna based on symmetrical dipoles. The butterfly antenna comprises a metal wiring tube, a signal separation cavity, a radiation assembly and a coaxial cable. The signal separation cavity is arranged at one end of the metal wiring pipe and is communicated with the metal wiring pipe; the radiation assembly is fixed outside the signal separation cavity and comprises two vibrators symmetrically arranged on the two sides of the signal separation cavity, and the vibrators are in a flat plate shape; the coaxial cable penetrates through the metal wiring pipe and extends into the signal separation cavity, and an inner conductor and an outer conductor of the coaxial cable are separated in the signal separation cavity and electrically connected to the two vibrators respectively. According to the scheme, the radiation assembly comprises the two platy vibrators which are symmetrically arranged, are butterfly-shaped and are installed in the signal separation cavity, the coaxial cable penetrates through the metal wiring pipe to enter the signal separation cavity, and the inner conductor and the outer conductor are separated in the signal separation cavity and are electrically connected to the two vibrators respectively, so that signal detection can be realized only through one antenna, and the signal detection efficiency is improved. And the ultra-wideband antenna is simple in structure, small in size, low in cost and relatively low in processing difficulty, the frequency band reaches 100 MHz to 3 GHz, and the requirement of low-frequency detection on the ultra-wideband is met.

Description

Technical Field

[0001] The utility model belongs to the field of antennas, and particularly relates to a butterfly antenna based on a symmetrical dipole. Background Art

[0002] Butterfly antennas are often used in signal detection. The size of traditional antennas for detection becomes very large as the frequency decreases, and the bandwidth is relatively narrow. Therefore, several antennas need to work simultaneously to meet the corresponding detection requirements.

[0003] Thus, due to the need for multiple antennas, the size is large, and the processing method is complex with low efficiency.

[0004] Therefore, for the detection field, there is an urgent need for an antenna with a small size, a frequency band that can satisfy broadband operation as much as possible, and low cost and processing difficulty. Summary of the Utility Model

[0005] The technical object of the utility model is to provide a butterfly antenna based on a symmetrical dipole. Through ingenious design, the frequency band of this butterfly antenna with a small-sized dipole antenna reaches 30 times the frequency, and it has simple processing and a small size, solving the problem that originally required multiple antennas but now only needs one antenna.

[0006] [[ID=X]]To solve the above technical problems, the utility model is realized as follows. A butterfly antenna based on a symmetrical dipole is provided, which includes a metal wire tube, a signal separation cavity, a radiation component, and a coaxial cable;

[0007] The signal separation cavity is installed at one end of the metal wire tube and is communicated with the metal wire tube;

[0008] The radiation component is fixed outside the signal separation cavity. The radiation component includes two dipoles symmetrically arranged on both sides of the signal separation cavity, and the dipoles are in a flat plate shape;

[0009] The coaxial cable passes through the metal wire tube and extends into the signal separation cavity. The inner conductor and the outer conductor of the coaxial cable are separated in the signal separation cavity and are respectively electrically connected to the two dipoles.

[0010] Further, the dipole includes two isosceles triangles with a common side connected in sequence from the signal separation cavity outwards, and the length of the median line of the triangle base closer to the signal separation cavity is less than the length of the median line of the triangle base farther from the signal separation cavity.

[0011] Further, the maximum size of the dipole is less than or equal to 470 mm.

[0012] Further, the radiation assembly further includes a support member fixed to the same side of the two oscillators by screws and an L-shaped plate fixed to the oscillator and the signal separation cavity by screws.

[0013] Further, the signal separation cavity is cubic in shape, and its bottom end is threadedly connected to the metal wire conduit. The radiation assembly further includes an L-shaped positioning block fixed by screws. The L-shaped positioning block is insulated. The outer corner of the L-shaped positioning block is clamped in the right-angle space formed between the L-shaped plate and the signal separation cavity, and the inner corner of the L-shaped positioning block is clamped at the right angle of the signal separation cavity.

[0014] Further, the support member is of a rectangular frame structure and is made of polytetrafluoroethylene material.

[0015] Further, a through hole is provided at a position corresponding to the L-shaped plate of the signal separation cavity. The signal separation cavity includes an insulating sleeve sleeved in the through hole, a conductive member embedded in the insulating sleeve and passing through the through hole, and a conductive sheet electrically connected to the inner end of the conductive member and extending into the signal separation cavity. The L-shaped plate is electrically connected to the corresponding conductive member, and the inner conductor and the outer conductor of the coaxial cable are welded to the corresponding conductive sheet.

[0016] Further, the bottom end of the conductive sheet is bent, and a relief hole is provided in the bent portion. The inner conductor and the outer conductor of the coaxial cable pass through the relief hole in the corresponding bent portion and are welded thereto.

[0017] Further, the side of the signal separation cavity facing away from the radiation assembly is a detachable rear cover.

[0018] Further, the operating frequency band of the butterfly antenna is 100 MHz to 3 GHz, and the standing wave is <2.5.

[0019] Compared with the prior art, the butterfly antenna based on symmetric oscillators in the present invention has the following beneficial effects:

[0020] In this solution, the radiation assembly is composed of two symmetrically arranged and flat oscillators in the shape of a butterfly, which are installed in the signal separation cavity. The coaxial cable passes through the metal wire conduit into the signal separation cavity, and the inner conductor and the outer conductor are separated in the signal separation cavity and are respectively electrically connected to the two oscillators. In this way, signal detection can be achieved by only one antenna, and the structure is simple, the volume is small, the cost is low, the processing difficulty is small, the frequency band reaches 100 MHz to 3 GHz, and it meets the requirements of ultra-wideband for low-frequency detection. Description of the Drawings

[0021] Figure 1 is a schematic diagram of the overall structure of the butterfly antenna based on symmetric oscillators in the embodiment of the present invention;

[0022] Figure 2 This is a three-dimensional exploded structural schematic diagram of a butterfly antenna based on a dipole in an embodiment of the present utility model.

[0023] In the drawings, each reference numeral represents: 1, a metal wire conduit; 2, a signal separation cavity; 21, an insulating sleeve; 22, a conductive member; 23, a conductive sheet; 24, a rear cover; 3, a radiation assembly; 31, an oscillator; 32, a support member; 33, an L-shaped plate; 34, an L-shaped positioning block; 4, a coaxial cable. Detailed implementation manners

[0024] The embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present utility model and should not be construed as a limitation of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0025] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model.

[0026] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality" means two or more unless otherwise specifically defined.

[0027] Such as Figure 1-2, in this embodiment, a butterfly antenna based on a dipole 31 is provided, which includes a metal wire tube 1, a signal separation cavity 2, a radiation component 3, and a coaxial cable; the signal separation cavity 2 is installed at one end of the metal wire tube 1 and communicates with the metal wire tube 1; the radiation component 3 is fixed outside the signal separation cavity 2, and the radiation component 3 includes two dipoles 31 symmetrically arranged on both sides of the signal separation cavity 2, and the dipole 31 is in a flat plate shape; the coaxial cable passes through the metal wire tube 1 and extends into the signal separation cavity 2, and the inner conductor and the outer conductor of the coaxial cable are separated in the signal separation cavity 2 and are respectively electrically connected to the two dipoles 31.

[0028] In this solution, the radiation component 3 is two dipoles 31 that are symmetrically arranged and in a flat plate shape, in a butterfly shape, and are installed in the signal separation cavity 2. The coaxial cable passes through the metal wire tube 1 into the signal separation cavity 2, and the inner conductor and the outer conductor are separated in the signal separation cavity 2 and are respectively electrically connected to the two dipoles 31. In this way, signal detection can be achieved only through one antenna, and the structure is simple, the volume is small, the cost is low, the processing difficulty is small, the frequency band reaches 100 MHz to 3 GHz, and it meets the requirements of ultra-wideband for low-frequency detection.

[0029] Further, the dipole 31 includes two isosceles triangles with a common side connected in sequence from the signal separation cavity 2 outward, and the length of the median line of the triangle base near the signal separation cavity 2 is less than the length of the median line of the triangle base far from the signal separation cavity 2. Among them, the corners of the dipole 31 near the outside are rounded, and the safety is higher. It should be understood that the sizes of the two isosceles triangles of the dipole 31 can be adjusted according to the actual situation. For example, the ratio of the length of the median line of the triangle base near the signal separation cavity 2 to the length of the median line of the triangle base far from the signal separation cavity 2 can be adjusted between 1.2 and 2.5, such as 1.3, 1.5, 1.8, 2.3, etc.

[0030] Further, the maximum size of the dipole 31 is less than or equal to 470 mm. Its maximum size is the length in the symmetry axis direction of the dipole 31.

[0031] Further, the radiation component 3 further includes a support member 32 fixed to the same side of the two dipoles 31 by screws and an L-shaped plate 33 fixed to between the dipole 31 and the signal separation cavity 2 by screws. Thereby, the dipole 31 is fixed stably and reliably.

[0032] Further, the signal separation cavity 2 is cubic in shape, and its bottom end is threadedly connected to the metal wire tube 1. The radiation assembly 3 further includes an L-shaped positioning block 34 fixed by screws. The L-shaped positioning block 34 is insulated. The outer corner of the L-shaped positioning block 34 is clamped in the right-angle space formed between the L-shaped plate 33 and the signal separation cavity 2, and the inner corner of the L-shaped positioning block 34 is clamped at the right angle of the signal separation cavity 2. Specifically, the L-shaped positioning block 34 is fixed to the oscillator 31 by two screws. One side of the L-shaped plate 33 is fixed to the oscillator 31 by three screws, and the other side of the L-shaped plate 33 is fixed to the signal separation cavity 2 by a screw. In this way, on the one hand, the L-shaped positioning block 34 can be stably fixed and firmly positioned with the signal separation cavity 2. On the other hand, the L-shaped positioning block 34 can isolate the oscillator 31 and the signal separation cavity 2 to ensure its working reliability.

[0033] Further, the support member 32 is of a rectangular frame structure and is made of polytetrafluoroethylene material. Specifically, it is in the shape of a mesh, and the end of the support member 32 is fixed to the corresponding oscillator 31 by three screws. In this way, the relative position relationship between the two oscillators 31 can be fixed through the connection of the support member 32, and it is not easy to loosen. Moreover, using polytetrafluoroethylene material will not affect the antenna performance.

[0034] Further, through holes are provided at positions corresponding to the L-shaped plate 33 on the signal separation cavity 2. The signal separation cavity 2 includes an insulating sleeve 21 sleeved in the through hole, a conductive member 22 embedded in the insulating sleeve 21 and passing through the through hole, and a conductive sheet 23 electrically connected to the inner end of the conductive member 22 and extending into the signal separation cavity 2. The L-shaped plate 33 is electrically connected to the conductive member 22 at the corresponding position. The inner conductor and the outer conductor of the coaxial cable are welded to the corresponding conductive sheet 23. The L-shaped plate 33 is connected to the conductive member 22 at the corresponding position by screws. The inner conductor and the outer conductor of the coaxial cable are welded to the corresponding conductive sheet 23. The welding method is simple and fast. Moreover, the electrical connection between the oscillator 31 and the coaxial cable 4 can be realized through the conductive sheet 23, the conductive member 22, the screw, and the L-shaped plate 33. The insulating sleeve 21 can, on the one hand, make the connection between the conductive member 22 and the signal separation cavity 2 reliable, and on the other hand, can also insulate the conductive member 22 and the signal separation cavity 2.

[0035] Further, the bottom end of the conductive sheet 23 is bent, and a relief hole is provided in the bent portion. The inner conductor and the outer conductor of the coaxial cable pass through the relief hole in the corresponding bent portion and are welded thereto. Specifically, the bottom end of the conductive sheet 23 welded to the inner conductor is higher than the bottom end of the conductive sheet 23 welded to the outer conductor. Moreover, welding is more convenient by passing through the relief hole, and welding operations can be performed in various directions and angles.

[0036] Further, the side of the signal separation cavity 2 facing away from the radiation assembly 3 is a detachable rear cover 24, which is connected by screws. In this way, disassembling the rear cover 24 can achieve the welding of the coaxial cable and the conductive sheet 23, as well as the conductive sheet 23 and the conductive part 22, which is simple and convenient.

[0037] Further, the operating frequency band of the butterfly antenna based on the dipole 31 is 100 MHz to 3 GHz, and the standing wave is <2.5.

[0038] In this solution, the metal wire duct 1, the signal separation cavity 2, the radiation assembly 3 and the coaxial cable are connected by screws, welding and threaded assembly to form an antenna. The signal input by the coaxial cable is radiated by the butterfly-shaped radiation assembly 3. The coaxial cable is 50 ohms and its signal input end is an N-type coaxial connector. After the signal is input, the inner and outer conductor signals are divided into two paths and transmitted to the two dipoles 31 through the settings of the conductive sheet 23 and the conductive part 22. Through the ingenious connection device, the parts of the device used are relatively simple and the cost is low. Only simple welding operations and screw connections are required to complete the assembly, and broadband signal radiation can be achieved through certain debugging. The antenna can be used as a signal transmitting device or a signal receiving device. Its principle is to reverse the transmitting working principle. When used as a signal receiving device, it can be used as a detection device. When a signal with a corresponding frequency is received, the signal will be transmitted to the working device through the butterfly antenna, and the staff will know that there is a target signal within the coverage range of this antenna.

[0039] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A butterfly antenna based on a dipole, characterized in that, It includes a metal wire duct, a signal separation cavity, a radiation component and a coaxial cable; The signal separation cavity is installed at one end of the metal wire duct and is communicated with the metal wire duct; The radiation component is fixed outside the signal separation cavity. The radiation component includes two oscillators symmetrically arranged on both sides of the signal separation cavity, and the oscillator is in a flat plate shape; The coaxial cable passes through the metal wire duct and extends into the signal separation cavity. The inner conductor and the outer conductor of the coaxial cable are separated in the signal separation cavity and are respectively electrically connected to the two oscillators.

2. The butterfly antenna based on a dipole according to claim 1, wherein The oscillator includes two isosceles triangles with a common side connected in sequence from the signal separation cavity outward, and the length of the median line of the triangle base close to the signal separation cavity is less than the length of the median line of the triangle base far from the signal separation cavity.

3. The butterfly antenna based on a dipole according to claim 2, wherein The maximum size of the oscillator is less than or equal to 470 mm.

4. The butterfly antenna based on a dipole according to claim 1, characterized in that The radiation component further includes a support member fixed to the same side of the two oscillators by screws and an L-shaped plate fixed to the oscillator and the signal separation cavity by screws.

5. The butterfly antenna based on a dipole according to claim 4, characterized in that, The signal separation cavity is in a cubic shape, and its bottom end is threadedly connected to the metal wire duct. The radiation component further includes an L-shaped positioning block fixed by screws. The L-shaped positioning block is insulated. The outer corner of the L-shaped positioning block is clamped in the right-angle space formed between the L-shaped plate and the signal separation cavity, and the inner corner of the L-shaped positioning block is clamped at the right angle of the signal separation cavity.

6. The butterfly antenna based on a dipole according to claim 4, wherein, The support member is in a rectangular frame structure and is made of polytetrafluoroethylene material.

7. The butterfly antenna based on a dipole according to claim 4, characterized in that A through hole is provided at the position of the signal separation cavity corresponding to the L-shaped plate. The signal separation cavity includes an insulating sleeve sleeved in the through hole, a conductive member embedded in the insulating sleeve and passing through the through hole, and a conductive sheet electrically connected to the inner end of the conductive member and extending into the signal separation cavity. The L-shaped plate is electrically connected to the conductive member at the corresponding position, and the inner conductor and the outer conductor of the coaxial cable are welded to the corresponding conductive sheet.

8. The butterfly antenna based on a dipole according to claim 7, characterized in that, The bottom end of the conductive sheet is bent, and a relief hole is provided in the bent part. The inner conductor and the outer conductor of the coaxial cable pass through the relief hole in the corresponding bent part and are welded to it.

9. The butterfly antenna based on a dipole according to claim 7, wherein The side of the signal separation cavity facing away from the radiation component is a detachable rear cover.

10. The butterfly antenna based on a dipole according to any one of claims 1 to 9, characterized in that The operating frequency band of the butterfly antenna is 100 MHz to 3 GHz, and the standing wave is <2.5.

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