A ±45° metal cross-dipole dual-polarized antenna with a reflective cavity

Abstract

The invention discloses a ±45° metal cross dipole dual-polarized antenna with a reflection cavity, comprising a dustproof component, a reflection component, an antenna vibrator component, a feeding component and a support plate component. The invention has the beneficial effects of using a metal symmetrical vibrator, the radiation surface of the vibrator is composed of two pairs of butterfly arms vertically crossed at ±45°, the butterfly arms and the connecting column are provided with column holes, the feeding column is arranged in the column hole, the upper end of the feeding column is connected to the T-shaped feeding metal sheet, the lower end of the feeding column is connected to the SMA connector, so that the electrical signal is fed into the conductor from the center of the antenna, and the square flange is connected to the bottom plate, mainly to increase the contact area and improve the stability of the radiation structure, so that the dual-polarized antenna can achieve a 44.7% -10dB impedance bandwidth, and its -15dB impedance bandwidth reaches 31.5%. The device has a simple structure, a wide bandwidth, a stable structure, a high polarization purity, and good radiation characteristics, and has good application prospects, especially in base station systems.

Description

Technical Field

[0001] The invention relates to the technical field of antennas, in particular to a ±45° metal cross dipole dual-polarization antenna with a reflection cavity. Background Art

[0002] The development of communication technology is closely related to antennas. In a way, the development of antenna technology affects the future of the communication industry. Due to the increasing demand for microwave communication services and large-capacity communications, spectrum resources are becoming increasingly tight, which also greatly restricts the development of the modern communication industry. Dual-polarized antennas can transmit two signals at the same frequency, which can greatly increase the number of spatial channels, that is, the same antenna can be used in different scenarios. This can reduce the power loss problem caused by polarization mismatch and effectively improve the transmission efficiency of the system. Therefore, the integrated design of antennas with dual-polarization performance will greatly improve the performance of the communication system.

[0003] For dual-polarized antennas, the structure using metal symmetrical oscillators not only has a long service life, but can also adapt to a wider range of environmental conditions. However, the bandwidth of this structure antenna is often limited, and its -10dB impedance bandwidth is often difficult to reach 30%. Therefore, a ±45° metal cross-dipole dual-polarized antenna with a reflective cavity is needed. Summary of the invention

[0004] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] In view of the above problems or problems existing in the prior art, the present invention is proposed.

[0006] Therefore, the purpose of the present invention is to provide a ±45° metal cross-dipole dual-polarized antenna with a reflection cavity, which can enable the dual-polarized antenna to achieve a -10dB impedance bandwidth of 44.7% (3GHz~4.7GHz), and its -15dB impedance bandwidth reaches 31.5% (3.26GHz~4.46GHz), the port isolation within the operating frequency exceeds 26dB, the minimum gain value is 8.08dBi, and the antenna adopts a metal symmetrical vibrator, the radiation surface adopts a ±45° butterfly arm, and a column hole is provided on the butterfly arm, and a feeding component is installed in the column hole to realize the feeding of electrical signals from the center of the antenna into the conductor, and the bottom plate is a flange structure, and the contact area with the bottom plate is increased to improve the stability of the radiation structure.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: a ±45° metal cross-dipole dual-polarized antenna with a reflection cavity, comprising a dustproof component, a reflection component, an antenna vibrator component, a feeding component and a support plate component;

[0008] The antenna vibrator assembly is arranged in the reflector assembly and below the dustproof assembly, a feeding assembly is arranged in the antenna vibrator assembly, an upper end surface of the support plate assembly is connected to a lower end surface of the reflector assembly, the dustproof assembly is connected to the reflector assembly, the reflector assembly and the support plate assembly form a cavity that can accommodate the antenna vibrator assembly and the feeding assembly, the reflector assembly includes a reflective cavity, the reflective cavity is a square internal cavity, a step is arranged on the reflective cavity, and the antenna vibrator assembly includes a square flange, a connecting column, a butterfly arm, and a column hole;

[0009] The upper end surface of the square flange is vertically connected with a connecting column, the upper end surface of the connecting column is connected to the lower end surface of the butterfly-shaped vibration arm, and column holes are provided in the butterfly-shaped vibration arm and the connecting column;

[0010] The height of the antenna element component is lower than the height of the reflective component.

[0011] As a preferred solution of the ±45° metal cross dipole dual-polarized antenna with a reflection cavity of the present invention, two groups of butterfly-shaped arms are arranged to cross vertically at ±45°.

[0012] As a preferred solution of the ±45° metal cross dipole dual-polarization antenna with a reflection cavity of the present invention, the vibrator component adopts a pure metal aluminum oxide structure.

[0013] As a preferred solution of the ±45° metal cross dipole dual-polarization antenna with a reflection cavity of the present invention, the column hole is a through hole, vertically penetrating the butterfly-shaped vibration arm, the connecting column and the square flange.

[0014] As a preferred solution of the ±45° metal cross dipole dual-polarized antenna with a reflective cavity of the present invention, wherein: the feeding assembly includes a feeding post, a T-shaped feeding metal sheet, an SMA connector, a feeding point hole, and a circular card slot;

[0015] The feeding column is arranged in the column hole, the upper end of the feeding column is connected to the T-shaped feeding metal sheet, one end of the T-shaped feeding metal sheet is a square head, a circular slot is arranged in the square head, the circular slot is fixed to the feeding column, the feeding point hole is a through hole, which passes through the support plate assembly, the probe on the SMA connector passes through the feeding point hole from the bottom support plate assembly and is connected to the lower end surface of the feeding column, the SMA connector, the feeding column and the T-shaped feeding metal sheet constitute a feeding circuit, so that the electrical signal is fed into the conductor from the center of the antenna.

[0016] As a preferred solution of the ±45° metal cross dipole dual-polarized antenna with a reflection cavity of the present invention, the dustproof component includes a dustproof cover, which is connected to the reflection cavity and arranged on the upper end surface of the step.

[0017] As a preferred solution of the ±45° metal cross dipole dual-polarized antenna with a reflection cavity of the present invention, the support plate assembly includes a bottom plate, and the bottom plate is fixedly arranged on the lower end surface of the reflection cavity.

[0018] As a preferred solution of the ±45° metal cross-dipole dual-polarized antenna with a reflection cavity of the present invention, the angle between the horizontal midline of the butterfly-shaped arm and the straight surface of the reflection cavity is 45°.

[0019] As a preferred solution of the ±45° metal cross dipole dual-polarized antenna with a reflection cavity of the present invention, the feeding post is made of copper metal, and the space between the feeding post and the post hole is filled with polytetrafluoroethylene for support.

[0020] Beneficial effects of the present invention: The antenna of the present invention adopts a metal symmetrical vibrator, the radiation surface of the vibrator is composed of two pairs of butterfly arms vertically crossed at ±45°, the butterfly arms and the connecting column are provided with column holes, the feeding column is arranged in the column hole, the upper end of the feeding column is connected to the T-shaped feeding metal sheet, and the lower end of the feeding column is connected to the SMA connector, so that the electrical signal is fed into the conductor from the center of the antenna, and the square flange is connected to the bottom plate, which mainly increases the contact area and improves the stability of the radiation structure, so that the dual-polarized antenna can achieve a -10dB impedance bandwidth of 44.7%, and its -15dB impedance bandwidth reaches 31.5%, the port isolation within the working frequency exceeds 26dB, the maximum gain is 9.42dBi, the gain difference is less than 1.34dBi, and the cross-polarization in the maximum radiation direction within the band is greater than 28dB. The device has a simple structure, a wide bandwidth, a stable structure, a high polarization purity, good radiation characteristics, and has a good application prospect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0022] Figure 1 It is a three-dimensional schematic diagram of a ±45° metal cross-dipole dual-polarized antenna with a reflection cavity.

[0023] Figure 2 It is the side view of the ±45° metal cross-dipole dual-polarized antenna with a reflective cavity.

[0024] Figure 3 It is a top view of the ±45° metal cross-dipole dual-polarized antenna with a reflective cavity.

[0025] Figure 4 This is a bottom view of the ±45° metal cross-dipole dual-polarized antenna with a reflective cavity.

[0026] Figure 5 It is the reflection coefficient diagram of the ±45° metal cross-dipole dual-polarized antenna with a reflection cavity.

[0027] Figure 6 This is the port isolation diagram of the ±45° metal cross-dipole dual-polarized antenna with a reflective cavity.

[0028] Figure 7 This is the gain diagram of the ±45° metal cross-dipole dual-polarized antenna with a reflective cavity.

[0029] Figure 8 The radiation patterns of the dual-polarized antenna -45° polarization in the xoz plane and yoz plane at 3.2GHZ for the ±45° metal cross-dipole dual-polarized antenna with a reflection cavity.

[0030] Fig. 9 The radiation patterns of the dual-polarized antenna -45° polarization in the xoz plane and yoz plane at 3.8 GHZ for the ±45° metal cross-dipole dual-polarized antenna with a reflection cavity.

[0031] Fig.10 The radiation patterns of the dual-polarized antenna -45° polarization in the xoz plane and yoz plane at 4.4 GHZ for the ±45° metal cross-dipole dual-polarized antenna with a reflection cavity.

[0032] Fig.11 The radiation patterns of the dual-polarized antenna +45° polarization at 3.2GHZ in the xoz plane and yoz plane of the ±45° metal cross-dipole dual-polarized antenna with a reflection cavity.

[0033] Fig.12 The radiation patterns of the dual-polarized antenna +45° polarization at 3.8GHZ in the xoz plane and yoz plane of the ±45° metal cross-dipole dual-polarized antenna with a reflection cavity.

[0034] Fig.13 The radiation patterns of the dual-polarized antenna +45° polarization at 4.4 GHZ in the xoz plane and yoz plane of the ±45° metal cross-dipole dual-polarized antenna with a reflection cavity. DETAILED DESCRIPTION

[0035] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0036] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0037] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0038] Example 1

[0039] Reference Figure 1 , which is the first embodiment of the present invention, and this embodiment provides a ±45° metal cross-dipole dual-polarized antenna with a reflection cavity, which includes a dustproof component 100, a reflection component 200, an antenna vibrator component 300, a feeding component 400, and a support plate component 500. The reflection component 200, the antenna vibrator component 300 and the feeding component 400 can allow the electrical signal to enter the conductor from the center of the antenna. The dustproof component 100, the reflection component 200 and the support plate component 500 structure can further improve the adaptability of the antenna in the environment.

[0040] Specifically, it includes a dustproof component 100, a reflective component 200, an antenna element component 300, a feeding component 400 and a supporting plate component 500;

[0041] The antenna vibrator assembly 300 is arranged in the reflection assembly 200 and below the dustproof assembly 100. The feeding assembly 400 is arranged in the antenna vibrator assembly 300. The upper end surface of the support plate assembly 500 is connected to the lower end surface of the reflection assembly 200. The dustproof assembly 100 is connected to the reflection assembly 200. The reflection assembly 200 and the support plate assembly 500 form a cavity that can accommodate the antenna vibrator assembly 300 and the feeding assembly 400.

[0042] In summary, the present invention can feed electrical signals from the center of the antenna to the conductor through the antenna vibrator assembly 300 and the feeding assembly 400. By arranging the antenna vibrator assembly 300 and the feeding assembly 400 inside the reflector assembly 200 and installing the reflector assembly 200 in combination through the dustproof assembly 100, the antenna vibrator assembly 300 and the feeding assembly 400 can be prevented from entering dust and other substances, thereby further enhancing the adaptability of the antenna in the environment.

[0043] Example 2

[0044] Reference Figures 1 to 4 , which is the second embodiment of the present invention. In the previous embodiment, the ±45° metal cross-dipole dual-polarized antenna with a reflection cavity includes a dustproof component 100, a reflection component 200, an antenna vibrator component 300, a feeding component 400, and a support plate component 500. The reflection component 200, the antenna vibrator component 300 and the feeding component 400 can allow the electrical signal to enter the conductor from the center of the antenna. The dustproof component 100, the reflection component 200 and the support plate component 500 structure can further improve the adaptability of the antenna in the environment.

[0045] Specifically, it includes a dustproof component 100, a reflective component 200, an antenna element component 300, a feeding component 400 and a supporting plate component 500;

[0046] The antenna vibrator assembly 300 is arranged inside the reflective assembly 200 and below the dustproof assembly 100. A feeding assembly 400 is arranged inside the antenna vibrator assembly 300. The support plate assembly 500 is connected to the lower end surface of the reflective assembly 200. The dustproof assembly 100 is connected to the reflective assembly 200.

[0047] Furthermore, the antenna element assembly 300 includes a square flange 302, a connecting column 303, a butterfly-shaped arm 304, and a column hole 301;

[0048] The upper end surface of the square flange 302 is vertically connected with a connecting column 303, the upper end surface of the connecting column 303 is connected to the lower end surface of the butterfly-shaped vibration arm 304, and a column hole 301 is provided in the butterfly-shaped vibration arm 304 and the connecting column 303;

[0049] Preferably, the lower end of the connecting column 303 is connected to the square flange 302, and the upper end of the connecting column 303 is connected to the butterfly arm 304. The connecting column 303 is arranged in four groups, and the butterfly arm 304, the connecting column 303 and the square flange 302 are all made of metal.

[0050] The height of the antenna element assembly 300 is lower than that of the reflection assembly 200. The reflection assembly 200 and the support plate assembly 500 form a cavity that can accommodate the antenna element assembly 300 and the feeding assembly 400.

[0051] Furthermore, two groups of butterfly arms are vertically cross-arranged at 304±45°.

[0052] Furthermore, the column hole 301 is a through hole, which vertically penetrates the butterfly-shaped vibration arm 304, the connecting column 303 and the square flange 302. This is to facilitate the placement of the feeding column 401 into the column hole 301.

[0053] Further, the feeding assembly 400 includes a feeding column 401, a T-shaped feeding metal sheet 402, an SMA connector 403, a feeding point hole 404, and a circular card slot 405;

[0054] The feeding column 401 is arranged in the column hole 301, and the upper end of the feeding column 401 is connected to the T-shaped feeding metal sheet 402. One end of the T-shaped feeding metal sheet 402 is a square head, and a circular card slot 405 is opened in the square head. The circular card slot 405 is fixed to the feeding column 401. The feeding point hole 404 is a through hole that passes through the support plate assembly 500. The probe on the SMA connector 403 passes through the feeding point hole 404 from the bottom support plate assembly 500 and is connected to the lower end surface of the feeding column 401. The SMA connector 403, the feeding column 401 and the T-shaped feeding metal sheet 402 constitute a feeding circuit, so that the electrical signal is fed into the conductor from the center of the antenna.

[0055] Preferably, the reflective assembly 200 includes a reflective cavity 201, which is a square internal cavity with steps arranged on the reflective cavity 201. The interior of the reflective cavity 201 is a hollow structure, and the reflective cavity 201 and the bottom plate 501 form a cavity, and the antenna element assembly 300 and the feeding assembly 400 are arranged in the cavity.

[0056] Furthermore, the dustproof assembly 100 includes a dustproof cover 101, which is connected to the reflection cavity 201 and arranged on the upper end surface of the step, so as to prevent dust or rainwater from entering the cavity and improve environmental adaptability.

[0057] Furthermore, the support plate assembly 500 includes a bottom plate 501, and the bottom plate 501 is fixedly disposed on the lower end surface of the reflection cavity 201. The bottom plate 501 is made of metal material.

[0058] Furthermore, the included angle between the horizontal midline of the butterfly-shaped vibration arm 304 and the vertical surface of the reflection cavity 201 is 45°.

[0059] Furthermore, the feeding post 401 is made of copper metal, and the space between the feeding post 401 and the post hole 301 is filled and supported by polytetrafluoroethylene.

[0060] It should be noted that the arms of the butterfly arm 304 are 7.54 mm apart, the diameter of the column hole 301 is 3.96 mm, the square flange 302 is 23.5 mm apart from the butterfly arm 304, the diameter of the feeding column 401 is 1.2 mm, the dust cover 101 is made of transparent PC material, the thickness of the butterfly arm 304 is 2.5 mm, and the reflection cavity 201, the square flange 302, the connecting column 303, the butterfly arm 304 and the base plate 501 are made of 6061 aluminum alloy material.

[0061] See also Figure 2The specific dimensions are h1=1mm, h2=6mm, h3=28.5mm, h4=6mm, h5=3mm, h6=1.5mm, h7=23mm, h8=2.5mm, h9=0.6mm, h10=3.5mm, h11=1mm, h12=1.3mm, h13=6.7mm, h14=0.5mm, d0=1mm.

[0062] See also Figure 3 The antenna vibrator assembly 300 and the reflection cavity 201 are located at the center of the base plate 501. The angles between the two pairs of butterfly arms 304 and the positive direction of the x-axis are +45° and -45° respectively. The butterfly arms 304 are connected by a T-shaped feeding metal sheet 402. Four circular holes of the same size are opened on the square flange 302 and the base plate 501 respectively, and the distances from the circular holes to the center are equal. The specific dimensions are: k1=2mm, k2=1mm, l1=70mm, l2=80mm, l3=40mm, d1=2mm, d2=1.2mm, d3=13.1mm, d4=2.75mm, d5=2.33mm, d6=4mm, d7=5.15mm, d8=5.65mm, d9=7.5mm, d10=9.5mm, d11=2.5mm.

[0063] See also Figure 4 The two sets of SMA connectors 403 are located under the bottom plate 501 , and the bottom plate 501 is provided with four fixing through holes S1 of the same size, with specific dimensions of d12=5mm, d13=9.5mm, and d14=28.34mm.

[0064] Reference Figure 5 , the reflection coefficient diagram of the dual-polarized antenna shows that within the frequency range of 3.00GHz to 4.68GHz, max{|S11|, |S22|} <-10dB, and the relative bandwidth is 44.7%. Within the frequency range of 3.26GHz to 4.46GHz, max{|S11|, |S22|} <-15dB, and the relative bandwidth reaches 31.5%.

[0065] Referring to Fig.,6, it can be seen that within the operating frequency range of 3.00GHz to 4.68GHz, the port isolation of the antenna is greater than 26.52dB.

[0066] See also Figure 7 It can be seen that within the operating frequency range of 3.00GHz to 4.68GHz, the antenna’s minimum gain is 8.08dBi, the maximum gain is 9.42dBi, and the gain difference is less than 1.34dBi.

[0067] See also Figure 8The radiation pattern of the dual-polarized antenna -45° polarization mode in the xoz plane and yoz plane at 3.2GHz has a maximum gain of 8.85dBi, a 3dB main lobe width of 71.85° in the xoz plane and 58.72° in the yoz plane, and the cross-polarization in the maximum radiation direction is greater than 31.37dB.

[0068] See also Fig. 9 The radiation pattern of the dual-polarized antenna -45° polarization mode in the xoz plane and yoz plane at 3.8GHz has a maximum gain of 9.28dBi, a 3dB main lobe width of 63.2° in the xoz plane, and a 3dB main lobe width of 66.39° in the yoz plane. The cross-polarization in the maximum radiation direction is greater than 31.4dB.

[0069] See also Fig.10 The radiation pattern of the dual-polarized antenna -45° polarization mode in the xoz plane and yoz plane at 4.4GHz has a maximum gain of 8.69dBi, a 3dB main lobe width of 40.42° in the xoz plane and 94.53° in the yoz plane, and the cross-polarization in the maximum radiation direction is greater than 28.6dB.

[0070] See also Fig.11 The radiation pattern of the xoz plane and yoz plane of the dual-polarized antenna with +45° polarization mode at 3.2GHz has a maximum gain of 8.86dBi, a 3dB main lobe width of 71.58° in the xoz plane, and a 3dB main lobe width of 58.5° in the yoz plane. The cross-polarization in the maximum radiation direction is greater than 34.08dB.

[0071] See also Fig.12 The radiation pattern of the xoz plane and yoz plane of the dual-polarized antenna with +45° polarization mode at 3.8GHz has a maximum gain of 9.30dBi, a 3dB main lobe width of 62.68° in the xoz plane and 66.1° in the yoz plane, and the cross-polarization in the maximum radiation direction is greater than 31.9dB.

[0072] See also Fig.13 The radiation pattern of the xoz plane and yoz plane of the dual-polarized antenna with +45° polarization mode at 4.4GHz has a maximum gain of 8.78dBi, a 3dB main lobe width of 40.37° in the xoz plane and 94.79° in the yoz plane, and the cross-polarization in the maximum radiation direction is greater than 28.57dB.

[0073] In summary, the present invention vertically connects the connecting column 303 by setting a square flange 302, the upper end of the connecting column 303 is connected to a butterfly arm 304, and the connecting column 303 and the butterfly arm 304 are provided with a column hole 301, a feeding column 401 is placed in the column hole 301, the upper end of the feeding column 401 is connected to the T-shaped feeding metal sheet 402, the SMA connector 403 passes through the feeding point hole 404 from under the bottom plate 501 and is connected to the lower end surface of the feeding column 401, the SMA connector 403 realizes feeding excitation by connecting to the coaxial line, and forms a feeding circuit, so that the electrical signal is fed into the conductor from the center of the antenna, and the square flange The bottom side of 302 is connected to the bottom plate 501 to increase the contact area and improve the stability of the radiation structure. The ±45° metal cross dipole dual-polarized antenna with a reflection cavity of this invention can achieve a -10dB impedance bandwidth of 44.7% from 3GHz to 4.7GHz, and its -15dB impedance bandwidth reaches 31.5% from 3.26GHz to 4.46GHz. The port isolation within the operating frequency exceeds 26dB, and the minimum gain is 8.08dBi. The ±45° metal cross dipole dual-polarized antenna with a reflection cavity of the present invention has a simple structure, a wide bandwidth, a stable structure, and good radiation characteristics, and has a good application prospect.

[0074] The dual-polarized antenna of the present invention adopts a metal symmetrical oscillator structure, has a -10dB impedance bandwidth of 44.7%, and its -15dB impedance bandwidth reaches 31.5%, which improves product stability while taking into account a relatively excellent working bandwidth. The ±45° metal cross-dipole dual-polarized antenna with a reflection cavity of the present invention has a simple structure, wide adaptability to the environment, long service life, and strong radiation ability, which makes the present invention have good application prospects in microwave communication and detection systems.

[0075] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0076] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0077] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0078] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A ±45° metal cross-dipole dual-polarized antenna with a reflective cavity, characterized in that: It comprises a dustproof component (100), a reflection component (200), an antenna vibrator component (300), a feeding component (400) and a support plate component (500); The antenna vibrator assembly (300) is arranged in the reflector assembly (200) and below the dustproof assembly (100); a feeding assembly (400) is arranged in the antenna vibrator assembly (300); the upper end surface of the support plate assembly (500) is connected to the lower end surface of the reflector assembly (200); the dustproof assembly (100) is connected to the reflector assembly (200); the reflector assembly (200) and the support plate assembly (500) form a cavity capable of accommodating the antenna vibrator assembly (300) and the feeding assembly (400); the reflector assembly (200) comprises a reflective cavity (201); the reflective cavity (201) is a square internal cavity; a step is arranged on the reflective cavity (201); the antenna vibrator assembly (300) comprises a square flange (302), a connecting column (303), a butterfly-shaped vibration arm (304), and a column hole (301); The upper end surface of the square flange (302) is vertically connected to a connecting column (303), the upper end surface of the connecting column (303) is connected to the lower end surface of the butterfly-shaped vibration arm (304), and column holes (301) are provided in the butterfly-shaped vibration arm (304) and the connecting column (303); The height of the antenna vibrator assembly (300) is lower than the height of the reflector assembly (200); the butterfly arms (304) are arranged in two groups vertically and crosswise at ±45°; the antenna vibrator assembly (300) adopts a pure metal aluminum oxide structure; the column hole (301) is a through hole, vertically penetrating the butterfly arm (304), the connecting column (303) and the square flange (302); the feeding assembly (400) comprises a feeding column (401), a T-shaped feeding metal sheet (402), an SMA connector (403), a feeding point hole (404), and a circular card slot (405); The feeding column (401) is arranged in the column hole (301); the upper end of the feeding column (401) is connected to the T-shaped feeding metal sheet (402); one end of the T-shaped feeding metal sheet (402) is a square head; a circular slot (405) is provided in the square head; the circular slot (405) is fixed to the feeding column (401); the feeding point hole (404) is a through hole that passes through the support plate assembly (500); a probe on the SMA connector (403) passes through the feeding point hole (404) from the bottom support plate assembly (500) and is connected to the lower end surface of the feeding column (401); the SMA connector (403), the feeding column (401) and the T-shaped feeding metal sheet (402) form a feeding circuit, so that an electrical signal is fed into the conductor from the center of the antenna; The included angle between the horizontal center line of the butterfly-shaped vibration arm (304) and the straight surface of the reflection cavity (201) is 45°, the symmetry axis of each pair of the butterfly-shaped vibration arms (304) is the horizontal center line, the reflection cavity (201) is composed of two parts, a curved cavity wall and a vertical cavity wall, and the straight surface included angle is the included angle between the symmetry axis of each pair of the butterfly-shaped vibration arms and the vertical cavity wall; The support plate assembly (500) comprises a bottom plate (501), and the bottom plate (501) is fixedly arranged on the lower end surface of the reflection cavity (201); The butterfly-shaped vibration arm (304) has a vibration arm distance of 7.54 mm, the column hole (301) has a diameter of 3.96 mm, the square flange (302) and the butterfly-shaped vibration arm (304) have a distance of 23.5 mm, the feed column (401) has a diameter of 1.2 mm, the butterfly-shaped vibration arm (304) has a thickness of 2.5 mm, and the reflection cavity (201), the square flange (302), the connecting column (303), the butterfly-shaped vibration arm (304) and the bottom plate (501) are made of 6061 aluminum alloy material; The antenna vibrator assembly (300) and the reflection cavity (201) are located at the center of the bottom plate (501); the angles between the two pairs of butterfly-shaped vibration arms (304) and the positive direction of the x-axis are respectively +45° and -45°; the butterfly-shaped vibration arms (304) are connected via a T-shaped feeding metal sheet (402); four circular holes of the same size are respectively opened on the square flange (302) and the bottom plate (501), and the distances from the circular holes to the center are equal; The metal cross-dipole dual-polarized antenna can achieve a -10dB impedance bandwidth of 44.7% and a -15dB impedance bandwidth of 31.5%.

2. The ±45° metal cross-dipole dual-polarized antenna with a reflective cavity as claimed in claim 1, characterized in that: The dustproof component (100) comprises a dustproof cover (101), wherein the dustproof cover (101) is connected to the reflection cavity (201) and is arranged on the upper end surface of the step.

3. The ±45° metal cross-dipole dual-polarized antenna with a reflective cavity as claimed in claim 1, characterized in that: The feeding post (401) is made of copper metal, and the space between the feeding post (401) and the post hole (301) is filled with polytetrafluoroethylene for support.

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