A broadband high-isolation antenna

Abstract

The application discloses a broadband high-isolation antenna, relates to the technical field of covering antennas, and solves the problems of a common multi-port antenna, such as narrow frequency band, poor isolation, and large appearance. Technical scheme points are that the broadband high-isolation antenna comprises a first monopole assembly and a second monopole assembly which are arranged adjacently, a first isolation strip is arranged between a first radiating element and a second radiating element and extends to between a first grounding element and a second grounding element, and a second isolation strip is arranged on a side of the first grounding element away from the first radiating element and extends to a side of the second grounding element away from the second radiating element. The two isolation strips are arranged to effectively reduce the isolation between adjacent ports, are applied to a shell with a circular structure, improve the utilization rate of the internal space, reduce the volume, and realize an antenna with the advantages of broadband, high isolation, beautiful appearance, and compatibility with different systems such as 2G, 3G, 4G and 5G.

Description

Technical Field

[0001] The present invention relates to the technical field of dual-port antennas, and in particular to a broadband and high-isolation antenna. Background Art

[0002] With the development of mobile communications, data capacity requirements are increasing. This translates to increasing the number of antennas or designing antennas with more ports, the latter being the most common approach. In the 5G era, the high speeds, large capacity, and low latency characteristics necessitate the increasing use of multi-port antennas. At the same time, compatibility with other frequency bands demands ever-wider antenna bandwidths. However, the overall antenna size must be considered within the constraints of the installation environment, limiting its size and potentially requiring reduction. This has led to changes in antenna unit and integrated design.

[0003] The two-port antenna is essentially an integrated design of two antennas. Each port corresponds to an independent antenna. When the antennas are too close together, interference will occur between the antennas. When the distance between them is too far, the integrated antenna will be larger. The industry stipulates the isolation indicator to quantify the degree of interference. Summary of the Invention

[0004] The purpose of the present invention is to provide a broadband and high-isolation antenna, which can ensure the radiation of signals and effectively reduce signal interference between adjacent ports. It can also be applied to a circular shell and ensure the internal space utilization of the shell.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions: a broadband and high-isolation antenna, comprising a first monopole component and a second monopole component arranged adjacent to each other, the first monopole component comprising a first radiating element and a first grounding component; the second monopole component comprising a second radiating element and a second grounding component, the first grounding component and the second grounding component being arranged side by side, a first isolation zone for improving isolation being provided between the first monopole component and the second monopole component; a second isolation zone extending to the side of the second grounding component away from the second radiating element being provided on the side of the first grounding component away from the second radiating element.

[0006] By adopting the above technical solution, the first monopole component and the second monopole component can realize omnidirectional radiation of the two ports, effectively shortening the longer spacing required to avoid signal interference between adjacent ports, so as to effectively improve the space utilization inside the shell, thereby facilitating the reduction of the overall occupied space; and it also has the advantage of excellent intermodulation, and different ports can be flexibly applied to different related fields.

[0007] A further configuration of the present invention includes a circular shell, wherein the first monopole assembly, the second monopole assembly, the first isolation zone and the second isolation zone are all arranged in the shell.

[0008] According to a further configuration of the present invention, the first isolation zone includes a first isolation segment and a first isolation segment extending between the first radiating element and the second radiating element; the first isolation segment and the second isolation segment are arranged vertically to form a T-shape, and the side of the second isolation segment facing away from the first isolation segment is matched with the inner wall of the shell.

[0009] By adopting the above technical solution, since the shell is circular and the two monopole components are square, in order to adapt to the monopole component with a rectangular shape while saving space inside the shell, the existing shell is generally also rectangular, but a single rectangular shell cannot meet people's growing requirements for design. Through this technical solution, while achieving mutual isolation of the two port signals, the two monopole components can also be placed at the same time in a shell with a relatively small internal space, so as to adapt to people's growing design requirements.

[0010] According to a further configuration of the present invention, the first monopole assembly and the second monopole assembly are arranged in a circle around the same center, and their axial directions form an acute angle.

[0011] By adopting the above technical solution, the signal radiation range of the first monopole component and the second monopole component can be easily improved.

[0012] According to a further configuration of the present invention, a reinforcement net for reinforcing the components is provided in the shell, and the reinforcement net is matched with the inner wall of the shell.

[0013] By employing the above-described technical solution, the reinforcement net can facilitate the secure fixation of the first monopole assembly and the second monopole assembly within the housing, thereby improving the resistance of the first and second monopole assemblies to displacement or loosening when subjected to external forces. The reinforcement net can simultaneously abut and compress the first and second monopole assemblies, while also reducing the contact area with the two monopole assemblies.

[0014] According to a further configuration of the present invention, a first branch for adjusting impedance and a first impedance adjustment section with a rectangular cross-section are provided on the side of the first radiating element close to the first grounding element; a second branch for adjusting impedance and a second impedance adjustment section with a trapezoidal cross-section are provided on the side of the first grounding element close to the first radiating element; the first grounding element and the first radiating element are both conductors.

[0015] According to a further configuration of the present invention, the first impedance adjustment segment includes a first straight line segment for impedance adjustment, the second impedance adjustment segment includes a second straight line segment for impedance adjustment and close to the first straight line segment, and a gap is left between the first straight line segment and the second straight line segment.

[0016] According to a further configuration of the present invention, the number of the first branches is at least two, and the first branches are respectively arranged at two ends of the first impedance adjustment section along its extension direction.

[0017] According to a further configuration of the present invention, the number of the second branches is at least two, and the second branches are respectively arranged at two ends of the second impedance adjustment section along its extension direction.

[0018] According to a further configuration of the present invention, a third branch adjacent to the second branch is provided on the side of the first grounding member where the second impedance adjustment section is located.

[0019] By adopting the above technical solution, the connecting wire is a coaxial cable, the inner conductor of the connecting wire is connected to the grounding piece, and the outer conductor of the connecting wire is connected to the radiating piece; through the length of the lower rectangular base of the radiating piece, the length of the trapezoidal upper base of the grounding piece, and the spacing between the above two bases, it can be used to achieve impedance matching and the microstrip line commonly used in the design of monopole antennas can be discarded; by reducing the use of additional accessories, the present solution can obtain a more streamlined structure, the enterprise's production and processing operations are simpler, thereby facilitating the reduction of the enterprise's production and processing costs, and the overall appearance can be made thinner and lighter; it can also achieve ultra-wide frequency band radiation, thereby facilitating the improvement of antenna gain and intermodulation performance.

[0020] The shape and arrangement of the first branch can further enhance the impedance adjustment effect of the first impedance adjustment section based on the first straight line section, thereby improving the gain and intermodulation performance of the antenna. The shape and arrangement of the second branch can further enhance the impedance adjustment effect of the second impedance adjustment section based on the second straight line section, thereby improving the gain and intermodulation performance of the antenna.

[0021] In summary, the present invention has the following beneficial effects:

[0022] 1. Broadband, which can meet the requirements of existing mainstream mobile communication systems;

[0023] 2. Through the design of isolation belt, excellent isolation is achieved, effectively reducing signal interference between adjacent ports;

[0024] 3. It is light, thin and compact, and can be applied to circular shells, ensuring the internal space utilization of the shell;

[0025] 4. Simple structure and good intermodulation performance.

[0026] In general, the present invention can achieve ultra-wide bandwidth while effectively reducing signal interference between adjacent ports, can be applied to a circular shell, and can ensure the internal space utilization of the shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural diagram of a broadband and high-isolation antenna;

[0028] Figure 2 yes Figure 1 Cross-sectional view of the middle CC plane;

[0029] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0030] Figure 4 yes Figure 1 Cross-sectional view of the middle GG plane.

[0031] Figure numerals: 1. Shell; 2. Reinforcement net; 3. First monopole assembly; 31. First radiation element; 32. First grounding element; 4. Second monopole assembly; 41. Second radiation element; 42. Second grounding element; 5. First isolation belt; 51. First isolation segment; 52. Second isolation segment; 6. Second isolation belt; 7. First impedance adjustment segment; 71. First straight segment; 8. Second impedance adjustment segment; 81. Second straight segment; 9. Spacing; 10. First branch; 11. Second branch; 12. Third branch. DETAILED DESCRIPTION

[0032] The present invention will be further described in detail below with reference to the accompanying drawings.

[0033] Example: A broadband high isolation antenna, such as Figure 1 As for Figure 4As shown, the device comprises a circular housing 1, and adjacent first and second monopole assemblies 3 and 4. The first monopole assembly 3 includes a first radiating element 31 and a first grounding element 32; the second monopole assembly 4 includes a second radiating element 41 and a second grounding element 42. The first and second grounding elements 32 and 42 are arranged side by side, achieving broadband coverage and meeting the requirements of existing mainstream mobile communication standards. A first isolation strip 5 is provided between the first and second radiating elements 31 and 41, extending to the gap between the first and second grounding elements. The first isolation strip 5 is used to reduce the impact between the first and second monopole assemblies 3 and 4, thereby achieving excellent isolation performance. A second isolation strip 6 is provided on the side of the first grounding element 32 facing away from the first radiating element 31, extending to the side of the second grounding element 42 facing away from the second radiating element 41. The axial direction of the first isolation strip 5 intersects the axial direction of the second isolation strip 6. Both the first isolation strip 5 and the second isolation strip 6 utilize conductors commonly used in the art. By combining the first isolation zone 5 and the second isolation zone 6 , the first monopole assembly 3 and the second monopole assembly 4 can obtain good isolation. Secondly, the setting of the second isolation zone 6 can also meet the layout of the internal space of the circular shell.

[0034] The first isolation zone 5 includes a first isolation segment 51 and a first isolation segment 51 extending between the first radiation element 31 and the second radiation element 41; the first isolation segment 51 and the second isolation segment 52 are arranged vertically to form a T shape, and the side of the second isolation segment 52 facing away from the first isolation segment 51 is matched with the inner wall of the shell 1.

[0035] The first monopole component 3 and the second monopole component 4 can realize omnidirectional radiation of the two ports, effectively shortening the long spacing 9 required to avoid signal interference between adjacent ports, so as to effectively improve the space utilization inside the shell 1, thereby facilitating the reduction of the overall occupied space; and also have the advantage of excellent intermodulation, and different ports can be flexibly applied to different related fields.

[0036] In this embodiment, the first monopole assembly 3 and the second monopole assembly 4 adopt the same technical structure, so the repeated description of the second monopole assembly 4 is omitted below.

[0037] The first monopole assembly 3, the second monopole assembly 4, the first isolation strip 5, and the second isolation strip 6 are all disposed within the housing 1. The first monopole assembly 3 and the second monopole assembly 4 are arranged circumferentially around the same center, and their axes form an acute angle, i.e., the first radiating element 31 and the second radiating element 41 are respectively located on either side of the acute angle and closer to the extension and amplification direction than the first grounding element 32 and the second grounding element 42.

[0038] Since the shell 1 is circular in shape and the two monopole components are square, in order to adapt to the monopole component with a rectangular shape while saving space inside the shell 1, the existing shell 1 is generally also rectangular. However, a single rectangular shell 1 cannot meet people's growing requirements for design. Through this technical solution, while achieving mutual isolation of the two port signals, the two monopole components can also be placed at the same time in the shell 1 with a relatively small internal space, so as to adapt to people's growing design requirements.

[0039] A reinforcement mesh 2 for reinforcing the various components is provided within the housing 1, and the reinforcement mesh 2 is arranged to match the inner wall of the housing 1. The reinforcement mesh 2 has a mesh structure and is integrally formed on the inner wall of the housing 1. The reinforcement mesh 2 can simultaneously abut and compress the first monopole assembly 3 and the second monopole assembly 4, while also reducing the contact area with the two monopole assemblies. The reinforcement mesh 2 can facilitate the secure fixing of the first monopole assembly 3 and the second monopole assembly 4 within the housing 1, thereby improving the ability of the first monopole assembly 3 and the second monopole assembly 4 to deflect or loosen when subjected to external force.

[0040] A first impedance adjustment section 7 with a rectangular cross-section is provided on the side of the first radiation element 31 close to the grounding element; a second impedance adjustment section 8 with a trapezoidal cross-section is provided on the side of the first grounding element 32 close to the first radiation element 31, and a gap 9 is left between the first impedance adjustment section 7 and the second impedance adjustment section 8.

[0041] The first impedance adjustment section 7 includes a first straight section 71 for impedance adjustment, and the second impedance adjustment section 8 includes a second straight section 81 for impedance adjustment and close to the first straight section 71 . The interval 9 is set between the first straight section 71 and the second straight section 81 .

[0042] On the first radiating element 31, a first branch 10 for adjusting impedance is provided on the side where the first impedance adjustment section 7 is located. The first branch 10 is adjacent to and smoothly arranged at the end of the first impedance adjustment section 7. On the first grounding element 32, a second branch 11 for adjusting impedance is provided on the side where the second impedance adjustment section 8 is located. The second branch 11 is adjacent to and smoothly arranged at the second impedance adjustment section 8. On the first grounding element 32, a third branch 12 is provided on the side where the second impedance adjustment section 8 is located, adjacent to the second branch 11.

[0043] In this embodiment, the first branch 10 is a raised portion with a rectangular cross section. There are two first branches 10 and they are symmetrically arranged on both sides of the first impedance adjustment section 7. The second branch 11 is a rectangular cross section with two connected rectangles at different heights from the side of the grounding member. There are two second branches 11 and they are symmetrically arranged on the sides.

[0044] On both sides of the second impedance adjustment section 8. The length of the first straight section 71 is 10 to 35 mm, the length of the second straight section 81 is 10 to 50 mm, and the spacing 9 is 0.5 to 3 mm. After abandoning the microstrip line commonly used in monopole antenna design, impedance matching can be achieved to effectively achieve impedance adjustment, thereby reducing the company's production and processing costs and making the overall appearance thinner and lighter. It can also achieve ultra-wideband radiation, thereby facilitating the improvement of antenna gain and intermodulation performance. The third branch 12 is a raised portion with a rectangular cross-section.

[0045] The first radiating element 31 is a radiating piece with an arc-shaped cross section, and the first grounding piece 32 is a grounding piece with a rectangular cross section. There is a polarization direction between the first radiating element 31 and the first grounding piece 32, and this polarization direction is a conventional technical means in this technical field. The connecting wire is a coaxial cable, the inner conductor of the connecting wire is connected to the first grounding piece 32, and the outer conductor of the connecting wire is connected to the first radiating element 31; the length of the lower rectangular base of the first radiating element 31, the length of the trapezoidal upper base of the first grounding piece 32, and the spacing 9 between the two bases can be used to achieve impedance matching and abandon the microstrip line commonly used in the design of monopole antennas; by reducing the use of additional accessories, the solution can obtain a more streamlined structure, the enterprise's production and processing operations are simpler, thereby facilitating the reduction of the enterprise's production and processing costs, and can also make the overall appearance lighter and thinner; it can also achieve ultra-wideband radiation, thereby facilitating the improvement of antenna gain and intermodulation performance.

[0046] The shape and arrangement of the first branch 10 can further enhance the impedance adjustment effect of the first impedance adjustment section 7 on the basis of the first straight section 71, thereby improving the gain and intermodulation performance of the antenna. The shape and arrangement of the second branch 11 can further enhance the impedance adjustment effect of the second impedance adjustment section 8 on the basis of the second straight section 81, thereby improving the gain and intermodulation performance of the antenna.

[0047] This specific embodiment is merely an explanation of the present invention and is not intended to limit the present invention. After reading this specification, those skilled in the art may make non-creative modifications to this embodiment as needed. However, as long as such modifications are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A broadband high-isolation antenna, comprising a circular housing (1) and a first monopole component (3) and a second monopole component (4) arranged adjacent to each other, wherein the first monopole component (3) comprises a first radiating element (31) and a first grounding element (32); and the second monopole component (4) comprises a second radiating element (41) and a second grounding element (42), characterized in that: The first monopole component (3) and the second monopole component (4) adopt the same technical structure; the first monopole component (3) abandons the microstrip line commonly used in the design of monopole antennas; The connecting line is a coaxial cable, the inner conductor of the connecting line is connected to the first grounding element (32), and the outer conductor of the connecting line is connected to the first radiation element (31); The first grounding member (32) and the second grounding member (42) are arranged side by side, and the first monopole assembly (3), the second monopole assembly (4), the first isolation belt (5), and the second isolation belt (6) are all arranged in the housing (1); the first monopole assembly (3) and the second monopole assembly (4) are arranged in a circle around the same center, and the axes of the two are at an acute angle; A first isolation zone (5) for improving isolation is provided between the first monopole component (3) and the second monopole component (4); the first isolation zone (5) comprises a first isolation section (51) and a first isolation section (52) extending between the first radiation element (31) and the second radiation element (41); a second isolation zone (6) is provided on a side of the first grounding element (32) away from the first radiation element (31) and extending to a side of the second grounding element (42) away from the second radiation element (41); The first radiating element (31) is provided with a first branch (10) for adjusting impedance and a first impedance adjustment section (7) with a rectangular cross section on the side close to the first grounding element (32); the first grounding element (32) is provided with a second branch (11) for adjusting impedance and a second impedance adjustment section (8) with a trapezoidal cross section on the side close to the first radiating element (31); the first grounding element (32) and the first radiating element (31) are both conductors; the first impedance adjustment section (7) includes a first straight section (71) for impedance adjustment, the length of the first straight section (71) is 10 to 35 mm, the second impedance adjustment section (8) includes a second straight section (81) for impedance adjustment and close to the first straight section (71), the length of the second straight section (81) is 10 to 50 mm, and a spacing (9) is left between the first straight section (71) and the second straight section (81), the spacing (9) is 0.5 to 3 mm, for achieving impedance matching.

2. The broadband high-isolation antenna according to claim 1, characterized in that: A reinforcement net (2) for reinforcing various components is provided in the shell (1), and the reinforcement net (2) is matched with the inner wall of the shell (1).

3. The broadband high-isolation antenna according to claim 1, characterized in that: The first isolation section (51) and the second isolation section (52) are arranged vertically to form a T-shape, and the side of the second isolation section (52) facing away from the first isolation section (51) is matched with the inner wall of the shell (1).

4. The broadband high-isolation antenna according to claim 1, characterized in that: The number of the first branches (10) is at least two, and they are respectively arranged at two ends of the first impedance adjustment section (7) along its own extension direction.

5. The broadband high-isolation antenna according to claim 1, characterized in that: The number of the second branches (11) is at least two, and they are respectively arranged at two ends of the second impedance adjustment section (8) along its own extension direction.

6. The broadband high-isolation antenna according to claim 1, characterized in that: On the first grounding member (32), a third branch (12) adjacent to the second branch (11) is provided on the side where the second impedance adjustment section (8) is located.

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