An antenna element and a broadband multi-port omnidirectional antenna using the same

Abstract

The present invention discloses an antenna element and a broadband multi-port omnidirectional antenna using the same, which includes an oscillator body. The oscillator body is formed by splicing a rectangular part and a trapezoidal part. One side of the rectangular part is fixedly connected to one side of the trapezoidal part. A plurality of parallel through grooves are formed inside the rectangular part, and a groove is formed on one side of the trapezoidal part away from the rectangular part. A fish-shaped structure is formed by the rectangular part, the trapezoidal part, the through grooves and the groove. The special fish-shaped structure is set for impedance matching, and takes into account the radiation pattern and gain, broadening the bandwidth. Specifically, the bandwidth of the oscillator body can be extended to the range of 600 - 6000 MHz. Moreover, the overall volume of the oscillator body is small, which is convenient for multiple oscillator bodies to form an array, broadening the capacity of the antenna. The special positional relationship between the isolation sheet and the fish-shaped oscillator body effectively reduces the interference between the oscillator bodies.

Description

Technical Field

[0001] The present invention relates to the technical field of antennas, and in particular to an antenna element and a broadband multi-port omnidirectional antenna using the same. Background Art

[0002] An omnidirectional antenna radiates uniformly in all 360° in the horizontal radiation pattern, that is, it has no directivity as commonly said. In the vertical radiation pattern, it shows a beam with a certain width. Generally, the smaller the beam width, the greater the gain.

[0003] For traditional omnidirectional antennas used for indoor signal coverage, the main structure of the antenna element body currently in use is mainly conical, with a relatively large overall volume. When multiple conical antenna elements are arrayed, the volume further expands, making the overall volume of the antenna extremely large. A large space needs to be reserved for the installation of the antenna, which is inconvenient to use in a small space, restricting the usage scenarios of the antenna. Moreover, the existing conical antenna element has a narrow bandwidth, only 698 - 4000 MHz, further restricting the usage range of the antenna. Summary of the Invention

[0004] The main object of the present invention is to propose an antenna element and a broadband multi-port omnidirectional antenna using the same, aiming to solve the technical problems that the conical antenna element of the existing omnidirectional antenna has too large a volume, is not convenient for array expansion, restricts the usage scenarios of the antenna, and has a narrow frequency band and a small application range.

[0005] To achieve the above object, the present invention proposes an antenna element, including an element body, which is formed by splicing a rectangular part and a trapezoidal part. One side of the rectangular part is fixedly connected to one side of the trapezoidal part. A plurality of parallel through grooves are opened inside the rectangular part, and a groove is opened on the side of the trapezoidal part away from the rectangular part.

[0006] Preferably, the element body forms a fish-shaped structure through the spliced rectangular part and trapezoidal part.

[0007] Preferably, 2 groups of the through grooves are opened inside the rectangular part, and both the through grooves and the groove are rectangular.

[0008] In addition, the present invention also proposes a broadband multi-port omnidirectional antenna using the antenna element as described in any one of the above, including a base. A reflector is detachably arranged above the base. The element body is arranged above the reflector, and a plurality of the element bodies are circumferentially distributed around the center of the base.

[0009] A plurality of isolation sheets are also arranged on the reflector, and the isolation sheets are located between adjacent element bodies.

[0010] Preferably, the spacer is "T-shaped" and has the same height as the oscillator body.

[0011] Preferably, it further includes a feeder line. One end of the oscillator body is electrically connected to the feeder line, and the number of feeder lines corresponds to the number of oscillator bodies.

[0012] A through hole is provided at the center of the base and the reflector, and the other end of the feeder line away from the oscillator body passes through the through hole.

[0013] Preferably, a first support column is fixedly connected to the bottom of the spacer away from the through hole, and the spacer is fixedly connected to the base through the provided first support column.

[0014] The bottom of the rectangular portion is fixedly connected to the base through the provided second support column. The middle of the trapezoidal portion is bent downward to form a connecting plate, and the trapezoidal portion is fixedly connected to the reflector through the provided connecting plate.

[0015] Preferably, a feeding plate is fixedly connected to the bottom of the rectangular portion, and an insulating pad is further provided between the feeding plate and the rectangular portion.

[0016] The feeding plate is in an "inverted eight-shaped", and the lower end of the "inverted eight-shaped" feeding plate is electrically connected to the feeder line.

[0017] Preferably, a plurality of buckle members are provided on the base, and the feeder line is fixed to the reflector through the buckle members.

[0018] Preferably, a cover is detachably provided above the base, and the cover covers the reflector, the oscillator body, the spacer and the feeder line.

[0019] The antenna oscillator of the present invention and the broadband multi-port omnidirectional antenna using the same have the following beneficial effects:

[0020] 1. A fish-shaped structure formed by the provided rectangular portion, trapezoidal portion, through groove and groove. The special fish-shaped structure is set for impedance matching, and takes into account the radiation pattern and gain, broadening the bandwidth, which can be extended to the range of 600 - 6000 MHz; and compared with the traditional conical oscillator, the volume of the oscillator body is smaller. After the flat-structured oscillator bodies are arrayed, the overall volume of the antenna structure is still small, which is convenient for more oscillator bodies to be arrayed to expand the ports and thus expand the capacity of the antenna.

[0021] 2. The special positional relationship between the spacer and the fish-shaped oscillator body effectively reduces the interference between the oscillator bodies. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0023] Figure 1 Schematic diagram of the external structure of the broadband multi-port omnidirectional antenna of the present invention;

[0024] Figure 2 Schematic diagram of the internal structure of the broadband multi-port omnidirectional antenna of the present invention;

[0025] Figure 3 Top view schematic diagram of the internal structure of the broadband multi-port omnidirectional antenna of the present invention;

[0026] Figure 4 Schematic diagram of the structure of the oscillator body of the broadband multi-port omnidirectional antenna of the present invention;

[0027] Figure 5 Radiation pattern of the broadband multi-port omnidirectional antenna of the present invention at 617 MHz;

[0028] Figure 6 Radiation pattern of the broadband multi-port omnidirectional antenna of the present invention at 1710 MHz;

[0029] Figure 7 Radiation pattern of the broadband multi-port omnidirectional antenna of the present invention at 3300 MHz;

[0030] Figure 8 Radiation pattern of the broadband multi-port omnidirectional antenna of the present invention at 5900 MHz;

[0031] Figure 9 Isolation diagram of the broadband multi-port omnidirectional antenna of the present invention;

[0032] Figure 10 Standing wave comparison diagram of the broadband multi-port omnidirectional antenna of the present invention;

[0033] Figure 11 Radiation pattern of the conical oscillator antenna of the comparative example of the present invention at 617 MHz;

[0034] Figure 12 Radiation pattern of the conical oscillator antenna of the comparative example of the present invention at 1710 MHz;

[0035] Figure 13 Radiation pattern of the conical oscillator antenna of the comparative example of the present invention at 3400 MHz;

[0036] Figure 14 Radiation pattern of the conical dipole antenna of the comparative example of the present invention at 5850 MHz;

[0037] Figure 15 Radiation pattern of the rectangular dipole of the comparative example at 617 MHz;

[0038] Figure 16 Radiation pattern of the rectangular dipole of the comparative example at 1710 MHz;

[0039] Figure 17 Radiation pattern of the rectangular dipole of the comparative example at 3300 MHz;

[0040] Figure 18 Radiation pattern of the rectangular dipole of the comparative example at 5900 MHz;

[0041] Figure 19 Standing wave comparison diagram of the rectangular dipole of the comparative example.

[0042] Explanation of the reference numerals in the attached drawings: 1. Base; 2. Outer cover; 3. Mounting buckle; 4. Reflector; 5. Fish-shaped dipole body; 6. Isolation sheet; 7. First support column; 8. Through hole; 9. Feeding plate; 10. Connecting plate; 11. Feeding wire; 12. Rectangular part; 13. Trapezoidal part; 14. Groove; 15. Through groove; 16. Rectangular dipole body; 17. Second support column; 18. Buckle part.

[0043] The realization, functional features and advantages of the object of the present invention will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0044] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0045] It should be noted that if there are directional indications such as up, down, left, right, front, back... in the embodiments of the present invention, the directional indications are only used to explain the relative position relationship and movement conditions between the components in a specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indications will also change accordingly. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0046] In an embodiment of the present invention, as Figures 1 to 19 shown, an antenna element includes an element body 5, the element body 5 is formed by splicing a rectangular part 12 and a trapezoidal part 13, one side of the rectangular part 12 is fixedly connected to one side of the trapezoidal part 13, and a plurality of parallel through slots 15 are formed inside the rectangular part 12, and a groove 14 is formed on one side of the trapezoidal part 13 away from the rectangular part 12.

[0047] Specifically, a fish-shaped structure formed by the provided rectangular part 12, trapezoidal part 13, groove 14 and through slots 15. The special fish-shaped structure is set for impedance matching, and takes into account the radiation pattern and gain, broadening the bandwidth. Specifically, the bandwidth of the element body can be extended to the range of 600 - 6000 MHz, and the overall volume of the element body 5 is small, which is convenient for multiple element bodies 5 to form an array, broadening the capacity of the omnidirectional antenna. In this solution, the opening direction of the through slots 15 is parallel to the width direction of the rectangular part 12, and the groove 14 is located at the edge of the trapezoidal part 13. Conventional conical elements occupy a large installation space in height. The fish-shaped element body 5 in this solution is a planar structure, with a small overall installation space, and its gain effect is comparable to that of traditional conical elements. When forming an array combination, the installation volume of the assembled antenna is further reduced. Therefore, the element body 5 with this structure is convenient for forming an array. After multiple element bodies 5 form an array, the overall volume of the antenna is still small, so it can be expanded into multiple ports, such as four ports, eight ports, etc., further expanding the capacity of the antenna.

[0048] Furthermore, the element body 5 forms a fish-shaped structure through the spliced rectangular part 12 and trapezoidal part 13. In this way, the special fish-shaped structure composed of the rectangular part 12 and the trapezoidal part 13 is mainly for impedance matching, and takes into account electrical performance indicators such as the radiation pattern and gain. The setting of the fish-shaped structure also broadens the signal bandwidth, enabling the bandwidth of the element body 5 to be extended to the range of 600 - 6000 MHz, broadening the usage range and usage scenarios of the omnidirectional antenna.

[0049] Furthermore, 2 groups of the through slots 15 are formed inside the rectangular part 12, and both the groove 14 and the through slots 15 are rectangular. The formation of the through slots 15 and the groove 14 is mainly for impedance matching, and also takes into account the radiation pattern.

[0050] In addition, the present invention also proposes a broadband multi-port omnidirectional antenna using the antenna element as described in any one of the above, including a base 1, a reflector 4 is detachably arranged above the base 1, the element body 5 is arranged above the reflector 4, and a plurality of the element bodies 5 are circumferentially distributed around the center of the base 1; a plurality of isolation sheets 6 are also arranged on the reflector 4, and the isolation sheets 6 are located between adjacent element bodies 5.

[0051] Specifically, in this embodiment, the fish-shaped oscillator bodies 5 are annularly distributed on the reflector 4. The middle space can be used to install the feeder line 11, etc. The oscillator bodies 5 are separated by the isolation sheets 6, and the arrangement directions of the multiple oscillator bodies 5 distributed around the center of the base 1 are consistent, that is, the trapezoidal part 13 of the previous oscillator body 5 corresponds to the rectangular part 12 of the next oscillator body 5. In this way, 4 or even more oscillator bodies 5 can be arranged, and the size and thickness of the overall structure of the omnidirectional antenna are relatively small.

[0052] Furthermore, the isolation sheet 6 is in a "T" shape and has the same height as the oscillator body 5. In this way, the isolation sheet 6 can isolate signals, effectively reducing the interference between the oscillator bodies 5. The "T"-shaped isolation sheet 6 has a good isolation effect in the oscillator body 5, and the isolation sheet 6 in this solution is directly formed by the reflector 4. A "T" structure is cut out on the reflector 4, and the "T" structure is lifted upward, and the end of the "T" structure is still directly connected to the reflector 4. The fixing method is relatively stable, and it is more material-saving and cost-effective.

[0053] Furthermore, it further includes a feeder line 11. One end of the feeder line 11 is electrically connected to the oscillator body 5, and the number of the feeder lines 11 corresponds to the number of the oscillator bodies 5; through holes 8 are opened at the centers of the base 1 and the reflector 4, and the other end of the feeder line 11 away from the oscillator body 5 passes through the through hole 8. The feeder line 11 is electrically connected to the oscillator body 5 and is mainly used for signal transmission. The feeder line 11 can specifically be a coaxial cable. When the number of oscillator bodies 5 increases, the corresponding feeder lines 11 increase synchronously to achieve the expansion of the omnidirectional antenna.

[0054] Furthermore, a first support column 7 is fixedly connected to the bottom of the isolation sheet 6 away from the through hole 8, and the isolation sheet 6 is fixedly connected to the base 1 through the provided first support column 7; the bottom of the rectangular part 12 is fixedly connected to the base 1 through the provided second support column 17, and the middle part of the trapezoidal part 13 is bent downward to form a connecting plate 10, and the trapezoidal part 13 is fixedly connected to the reflector 4 through the provided connecting plate 10.

[0055] In this way, the first support column 7 is used to support the isolation sheet 6, and the second support column 17 is used to support the rectangular part 13, so that the isolation sheet 6 and the rectangular part 13 are always kept at a constant height. This stable structure ensures the stability of the electrical performance indicators of the antenna. In addition to supporting the trapezoidal part 13, the connecting plate 10 is insulated from the reflector 4 through an insulating pad (not shown in the figure) at its bottom end, which plays a role in optimizing the intermodulation index and the standing wave index.

[0056] Furthermore, a feeding plate 9 is fixedly connected to the bottom of the rectangular portion 12, and an insulating pad (not shown in the figure) is further provided between the feeding plate 9 and the rectangular portion 12; the feeding plate 9 is in an "inverted eight shape", and the lower end of the feeding plate 9 in the "inverted eight shape" is electrically connected to the feeding wire 11.

[0057] It can be understood that feeding is carried out through the arrangement of the feeding plate 9 and the feeding wire 11; and an insulating pad is further provided between the feeding plate 9 and the rectangular portion 12, which plays a role in optimizing the intermodulation index and the standing wave index.

[0058] Furthermore, a plurality of buckle members 18 are provided on the base 1, and the feeding wire 11 is fixed to the reflector 4 through the buckle members 18. In this way, the feeding wire 11 is fixed to the reflector 4 through the buckle members 18 inside the antenna, preventing it from moving randomly during the installation process, affecting the feeding effect, and ensuring that the signal reception effect of the omnidirectional antenna is more stable.

[0059] Furthermore, an outer cover 2 is detachably arranged above the base 1, and the outer cover 2 covers the reflector 4, the oscillator body 5, the isolation sheet 6, and the feeding wire 11. In this way, the outer cover 2 isolates external dust and other pollutants, ensuring the signal stability of the omnidirectional antenna, and the outer cover 2 adopts a flat structure, and the flat outer cover 2 has a smaller floor area and less consumables.

[0060] As Figures 5 - 8 、 Figure 10 and Figures 15 - 19 shown, another comparative example is set in this solution and compared with the oscillator body 5 of the fish-shaped structure in this solution. In this comparative example, a conventional rectangular oscillator is used for arraying. After detecting the gain and standing wave ratio of the antenna after the rectangular oscillator is arrayed, comparing the detection results of the antenna after the oscillator body 5 of the fish-shaped structure in this solution is arrayed, it can be obtained that the antenna after the oscillator body 5 of the fish-shaped structure in this solution has better gain effect and standing wave ratio.

[0061] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. All equivalent structural transformations made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An antenna element, characterized in that: It includes an oscillator body (5), and the oscillator body (5) is formed into a fish-shaped structure by splicing a rectangular part (12) and a trapezoidal part (13). The trapezoidal part (13) includes a shorter upper base and a longer lower base. One side of the rectangular part (12) is fixedly connected to one side of the upper base of the trapezoidal part (13). A plurality of parallel through slots (15) are formed inside the rectangular part (12). The through slots (15) are parallel to the width direction of the rectangular part (12). A groove (14) is formed on the side of the lower base of the trapezoidal part (13) away from the rectangular part (12). Both the through slots (15) and the groove (14) are rectangular.

2. The antenna oscillator according to claim 1, wherein: Two groups of the through slots (15) are formed inside the rectangular part (12).

3. A broadband multi-port omnidirectional antenna using the antenna element according to any one of claims 1-2, characterized in that: It includes a base (1). A reflector (4) is detachably arranged above the base (1). The oscillator body (5) is arranged above the reflector (4). A plurality of the oscillator bodies (5) are circumferentially distributed around the center of the base (1); A plurality of isolation sheets (6) are further arranged on the reflector (4). The isolation sheets (6) are located between adjacent oscillator bodies (5).

4. A broadband multi-port omnidirectional antenna according to claim 3, characterized in that: The isolation sheet (6) is in a "T" shape and is of the same height as the oscillator body (5).

5. The omnidirectional antenna with wide frequency band and multiple ports according to claim 3, characterized in that: It further includes a feeder line (11). One end of the oscillator body (5) is electrically connected to the feeder line (11). The number of the feeder lines (11) corresponds to the number of the oscillator bodies (5); A through hole (8) is formed through the centers of the base (1) and the reflector (4). The other end of the feeder line (11) away from the oscillator body (5) passes through the through hole (8).

6. The omnidirectional antenna with wide frequency band and multiple ports according to claim 5, wherein: A first support column (7) is fixedly connected to the bottom of the isolation sheet (6) away from the through hole (8). The isolation sheet (6) is fixedly connected to the base (1) through the arranged first support column (7); The bottom of the rectangular part (12) is fixedly connected to the base (1) through the arranged second support column (17). The middle part of the trapezoidal part (13) is bent downward to form a connecting plate (10). The trapezoidal part (13) is fixedly connected to the reflector (4) through the arranged connecting plate (10).

7. The omnidirectional antenna with wide frequency band and multiple ports according to claim 5, characterized in that: A feeding plate (9) is fixedly connected to the bottom of the rectangular part (12). An insulating pad is further arranged between the feeding plate (9) and the rectangular part (12); The feeding plate (9) is in an "inverted eight" shape. The lower end of the feeding plate (9) in the "inverted eight" shape is electrically connected to the feeder line (11).

8. A broadband multi-port omnidirectional antenna according to claim 5, characterized in that: A plurality of buckle parts (18) are arranged on the base (1). The feeder line (11) is fixed on the reflector (4) through the buckle parts (18).

9. The omnidirectional antenna with wide frequency band and multiple ports according to claim 5, characterized in that: An outer cover (2) is detachably arranged above the base (1). The outer cover (2) covers the reflector (4), the oscillator body (5), the isolation sheet (6) and the feeder line (11).

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