Miniaturized broadband omnidirectional antenna

Abstract

This invention discloses a miniaturized broadband omnidirectional antenna, comprising a base plate and a grounding arm, a first radiating element, a second radiating element, a third radiating element, and a fourth radiating element disposed on the same side of the base plate. The first radiating element is spaced apart from the base plate and connected to the base plate via the grounding arm. The second, third, and fourth radiating elements are all located between the first radiating element and the base plate. The second radiating element is connected to both the first and third radiating elements, and the fourth radiating element is connected to the third radiating element. This miniaturized broadband omnidirectional antenna has a simple structure, is integrally molded, and is securely installed. It achieves miniaturization, broadband, and omnidirectional characteristics, with an operating frequency coverage of 2.3 GHz to 5.85 GHz, a VSWR below 1.8, and a bandwidth of 87%.

Description

Technical Field

[0001] This invention relates to the field of mobile communication technology, and in particular to a miniaturized wideband omnidirectional antenna. Background Technology

[0002] In mobile communication systems, antennas play a crucial role, serving as the vital conduit for wireless signal transmission and reception. The design and quality of the antenna determine the overall quality of mobile communication. Mobile communication network coverage requires antennas as carriers to transmit and receive the electromagnetic waves needed for network coverage. With the rollout of 5G (fifth-generation mobile communication) in China, to achieve high-speed characteristics, 5G requires wider bandwidth and has been allocated new operating frequency bands, including the 3.5GHz and 4.9GHz bands. Simultaneously, MIMO, as one of the 5G mobile communication technologies, is also widely used, necessitating the placement of as many antennas as possible within a limited space. 5G microcells, as a supplement to macrocells, are also rapidly developing and being deployed, creating an urgent need in the industry for antennas suitable for 5G microcell networks.

[0003] Therefore, it is necessary to provide a new technological solution. Summary of the Invention

[0004] To address the technical problems existing in the prior art, this invention discloses a miniaturized broadband omnidirectional antenna, the specific solution of which is as follows:

[0005] The miniaturized broadband omnidirectional antenna of the present invention includes a base plate and a grounding arm, a first radiating element, a second radiating element, a third radiating element, and a fourth radiating element disposed on the same side of the base plate. The first radiating element is spaced apart from the base plate and is connected to the base plate through the grounding arm. The second, third, and fourth radiating elements are all located between the first radiating element and the base plate. The second radiating element is connected to the first and third radiating elements respectively, and the fourth radiating element is connected to the third radiating element.

[0006] Furthermore, the length direction of the grounding arm is consistent with the width direction of the base plate, the grounding arm is perpendicularly disposed at one end of the base plate, and a slot is formed on the grounding arm.

[0007] Furthermore, the slot is S-shaped.

[0008] Furthermore, the first radiating element and the base plate are located on the same side of the grounding arm, the length direction of the first radiating element is consistent with the length direction of the base plate, the first radiating element is parallel to the base plate, one end of the first radiating element is connected to the end of the grounding arm away from the base plate, and a first through hole is provided on the first radiating element.

[0009] Furthermore, the second radiating element is perpendicular to the first radiating element, the length direction of the second radiating element is consistent with the width direction of the first radiating element, the second radiating element is located on the side of the first through hole away from the grounding arm, and the second radiating element is aligned with the edge of the first through hole.

[0010] Furthermore, the third radiating element is located on the side of the second radiating element closer to the grounding arm. The length direction of the third radiating element is consistent with the length direction of the base plate. The third radiating element is parallel to the substrate. One end of the third radiating element is connected to the end of the second radiating element away from the first radiating element. A second through hole is provided on the third radiating element.

[0011] Furthermore, the fourth radiating element is located between the third radiating element and the base plate, the fourth radiating element is perpendicular to the third radiating element, the length direction of the fourth radiating element is consistent with the width direction of the third radiating element, the fourth radiating element is located on the side of the second through hole away from the second radiating element, and the fourth radiating element is aligned with the edge of the second through hole.

[0012] Furthermore, the base plate has several fixing holes, and / or the side of the base plate away from the radiation array is provided with double-sided adhesive.

[0013] Furthermore, the base plate has coaxial welding marks on the side with the radiating array and on the side of the fourth radiating array near the grounding arm.

[0014] Furthermore, the base plate, grounding arm, first radiating element, second radiating element, third radiating element, and fourth radiating element are all stainless steel plate structures pre-plated with nickel.

[0015] Compared with the prior art, the miniaturized broadband omnidirectional antenna of this application has one or more of the following advantages:

[0016] (1) The miniaturized broadband omnidirectional antenna of this application integrates the base plate and the array element through the grounding arm, thereby realizing the integrated molding of the antenna. It has a simple structure, fewer subsequent processing steps, and low cost.

[0017] (2) The miniaturized broadband omnidirectional antenna of this application is made of stainless steel pre-plated with nickel to ensure the strength and solderability of the antenna.

[0018] (3) The miniaturized broadband omnidirectional antenna of this application has a vertical bending design between each radiating element, which makes the working path of the antenna longer, thereby realizing the miniaturization of the antenna in a limited space.

[0019] (4) The miniaturized broadband omnidirectional antenna of this application has an “S”-shaped slot on its grounding arm. By adjusting the size and width of the “S”-shaped slot, the bandwidth can be effectively improved and the standing wave characteristics of the antenna can be optimized.

[0020] (5) The miniaturized broadband omnidirectional antenna of this application has an operating frequency range of 2.3GHz to 5.85GHz, a standing wave ratio of less than 1.8, and achieves a bandwidth of 87%. Its horizontal plane non-circularity can be + / -3dB. Attached Figure Description

[0021] Figure 1 A three-dimensional structural diagram of a miniaturized broadband omnidirectional antenna provided in an embodiment of this application in one direction;

[0022] Figure 2 A three-dimensional structural diagram of the miniaturized broadband omnidirectional antenna provided in an embodiment of this application from another direction;

[0023] Figure 3 A schematic diagram of the miniaturized broadband omnidirectional antenna provided in the embodiments of this application in the side view direction;

[0024] Figure 4 Standing wave diagram of a miniaturized broadband omnidirectional antenna provided in the embodiments of this application;

[0025] Figure 5 The 2D horizontal radiation pattern of the miniaturized broadband omnidirectional antenna provided in this application embodiment at a frequency of 2.4 GHz;

[0026] Figure 6 The 2D horizontal radiation pattern of the miniaturized broadband omnidirectional antenna provided in this application embodiment at a frequency of 2.69 GHz;

[0027] Figure 7 The 2D horizontal radiation pattern of the miniaturized broadband omnidirectional antenna provided in this application embodiment at a frequency of 3.5 GHz;

[0028] Figure 8 The 2D horizontal plane radiation pattern of the miniaturized broadband omnidirectional antenna provided in the embodiments of this application at a frequency of 4.5 GHz.

[0029] Among them, 1-base plate, 11-fixing hole, 2-grounding arm, 21-slot, 3-first radiating element, 31-first through hole, 4-second radiating element, 5-third radiating element, 51-second through hole, 6-fourth radiating element, 7-coaxial welding mark. Detailed Implementation

[0030] To further illustrate the technical means and effects adopted by the present invention to achieve the intended purpose, the following detailed description of the specific implementation methods, structure, features and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided.

[0031] Please see Figures 1 to 8 , Figure 1 A three-dimensional structural diagram of a miniaturized broadband omnidirectional antenna provided in an embodiment of this application in one direction; Figure 2 A three-dimensional structural diagram of the miniaturized broadband omnidirectional antenna provided in an embodiment of this application from another direction; Figure 3 A schematic diagram of the miniaturized broadband omnidirectional antenna provided in the embodiments of this application in the side view direction; Figure 4 Standing wave diagram of a miniaturized broadband omnidirectional antenna provided in the embodiments of this application; Figure 5 The 2D horizontal radiation pattern of the miniaturized broadband omnidirectional antenna provided in this application embodiment at a frequency of 2.4 GHz; Figure 6 The 2D horizontal radiation pattern of the miniaturized broadband omnidirectional antenna provided in this application embodiment at a frequency of 2.69 GHz; Figure 7 The 2D horizontal radiation pattern of the miniaturized broadband omnidirectional antenna provided in this application embodiment at a frequency of 3.5 GHz; Figure 8 The 2D horizontal plane radiation pattern of the miniaturized broadband omnidirectional antenna provided in the embodiments of this application at a frequency of 4.5 GHz.

[0032] Example

[0033] This embodiment provides a miniaturized wideband omnidirectional antenna, such as Figures 1 to 3 As shown, the antenna includes a base plate 1 and a grounding arm 2, a first radiating element 3, a second radiating element 4, a third radiating element 5, and a fourth radiating element 6, all located on the same side of the base plate 1. The first radiating element 3 is spaced apart from the base plate 1 and connected to the base plate 1 via the grounding arm 2. The second, third, and fourth radiating elements 4, 5, and 6 are all located between the first radiating element 3 and the base plate 1. The second radiating element 4 is connected to both the first radiating element 3 and the third radiating element 5, and the fourth radiating element 6 is connected to the third radiating element 5. The antenna of this application integrates the base plate 1 and the elements through the grounding arm 2, thereby achieving integrated antenna molding.

[0034] In a further embodiment, the length direction of the grounding arm 2 is consistent with the width direction of the base plate 1, and the grounding arm 2 is perpendicularly disposed at one end of the base plate 1. A slot 21 is formed on the grounding arm 2. Preferably, the slot 21 is "S"-shaped. By adjusting the size and width of this "S"-shaped slot 21, the bandwidth can be effectively improved and the VSWR characteristics of the antenna can be optimized.

[0035] In a further embodiment, the first radiating element 3 and the base plate 1 are located on the same side of the grounding arm 2. The length direction of the first radiating element 3 is consistent with the length direction of the base plate 1. The first radiating element 3 is parallel to the base plate 1. One end of the first radiating element 3 is connected to the end of the grounding arm 2 away from the base plate 1. A first through hole 31 is provided on the first radiating element 3.

[0036] The second radiating element 4 is perpendicular to the first radiating element 3. The length direction of the second radiating element 4 is consistent with the width direction of the first radiating element 3. The second radiating element 4 is located on the side of the first through hole 31 away from the grounding arm 2. The second radiating element 4 is aligned with the edge of the first through hole 31.

[0037] The third radiating element 5 is located on the side of the second radiating element 4 near the grounding arm 2. The length direction of the third radiating element 5 is consistent with the length direction of the base plate 1. The third radiating element 5 is parallel to the substrate. One end of the third radiating element 5 is connected to the end of the second radiating element 4 away from the first radiating element 3. A second through hole 51 is provided on the third radiating element 5.

[0038] The fourth radiating element 6 is located between the third radiating element 5 and the base plate 1. The fourth radiating element 6 is perpendicular to the third radiating element 5. The length direction of the fourth radiating element 6 is consistent with the width direction of the third radiating element 5. The fourth radiating element 6 is located on the side of the second through hole 51 away from the second radiating element 4. The fourth radiating element 6 is aligned with the edge of the second through hole 51.

[0039] The vertical bending design between each radiating element lengthens the antenna's working path, thereby enabling miniaturization of the antenna within a limited space.

[0040] In a further embodiment, the base plate 1 is provided with a plurality of fixing holes 11, for example as follows: Figure 1 or Figure 2 The three mounting holes shown are arranged as follows: one is positioned near the grounding arm 2, and the other two are symmetrically positioned near the end of the base plate 1 furthest from the grounding arm 2. The mounting holes 11 allow for an effective fixed connection between the antenna and the metal shielding cavity of the micro-station equipment. However, the number of mounting holes 11 is not limited to three; multiple holes can be used.

[0041] In a further embodiment, double-sided adhesive can also be provided on the side of the base plate 1 away from the radiating array, and it can be fixed to the shielding cavity of the 5G micro base station by adhesive.

[0042] In a further embodiment, coaxial welding marks 7 are provided on one side of the bottom plate 1 where the radiation element is provided and on one side of the fourth radiation element 6 close to the grounding arm 2. Through these two positions, a coaxial cable can be welded, thereby realizing the input and output of antenna signals.

[0043] In a further embodiment, the bottom plate 1, the grounding arm 2, the first radiation element 3, the second radiation element 4, the third radiation element 5 and the fourth radiation element 6 are preferably made of a metal plate structure of stainless steel pre-plated with nickel, which can ensure the strength and weldability of the antenna.

[0044] Through the above structural design, the operating frequency of the miniaturized broadband omnidirectional antenna of the present application can cover 2.3 GHz to 5.85 GHz. As Figure 4 shown, it can be seen from the figure that the standing wave ratio of the antenna in the frequency band of 2.3 GHz to 5.85 GHz is below 1.8, achieving a broadband characteristic with a bandwidth of 87%. It can completely cover the common operating frequency bands of 5G: 2.3 GHz - 2.4 GHz, 2.49 GHz - 2.69 GHz, 3.3 GHz - 3.9 GHz and 4.5 GHz - 4.9 GHz. As Figures 5 to 8 shown, the non-circularity of the horizontal plane of the miniaturized broadband omnidirectional antenna of the present application can be within + / - 3 dB.

[0045] In specific implementation, the miniaturized broadband omnidirectional antenna of the present application can be formed by bending a rectangular stainless steel pre-plated nickel metal plate. The metal plate is bent twice along its length direction, and each bending angle is 90 degrees, forming a "匚" - shaped structure as shown in the figure. Its bottom serves as the bottom plate 1, the side serves as the grounding arm 2, and the top serves as the first radiation element 3. A small rectangular metal plate is cut out at the middle position of the first radiation element 3. Except for one side away from the grounding arm 2, the other three sides of the small rectangular metal plate are separated from the first radiation element 3. The small rectangular metal plate is bent 90 degrees downward along its side away from the grounding arm 2 to form the second radiation element 4. The end of the small rectangular metal plate continues to be bent 90 degrees in the direction close to the grounding arm 2 to form the third radiation element 5. A smaller rectangular metal plate is cut out at the middle of the third radiation element 5. Except for one side close to the grounding arm 2, the other three sides of the smaller rectangular metal plate are separated from the third radiation element 5. The smaller rectangular metal plate is bent 90 degrees downward along its side close to the grounding arm 2 to form the fourth radiation element 6.

[0046] By adjusting the bending positions of the second radiation element 4, the third radiation element 5 and the fourth radiation element 6, and by adjusting the length - width ratios of the first radiation element 3, the second radiation element 4, the third radiation element 5 and the fourth radiation element 6, the broadband characteristics of the antenna can be realized. At the same time, by adjusting the width of the antenna and the length and width of each radiation element, the omnidirectional characteristics of the antenna can be realized, and the non - circularity of the antenna horizontal plane can be controlled within + / - 3 dB.

[0047] Through innovative design and adjustments to various dimensions, the integrated bending design achieves an antenna size of 25.5(L)*20(W)*12.5(H)mm, thus miniaturizing the antenna.

[0048] Compared with the prior art, the miniaturized broadband omnidirectional antenna of this application has one or more of the following advantages:

[0049] (1) The miniaturized broadband omnidirectional antenna of this application integrates the base plate and the array element through the grounding arm, thereby realizing the integrated molding of the antenna. It has a simple structure, fewer subsequent processing steps, and low cost.

[0050] (2) The miniaturized broadband omnidirectional antenna of this application is made of stainless steel pre-plated with nickel to ensure the strength and solderability of the antenna.

[0051] (3) The miniaturized broadband omnidirectional antenna of this application has a vertical bending design between each radiating element, which makes the working path of the antenna longer, thereby realizing the miniaturization of the antenna in a limited space.

[0052] (4) The miniaturized broadband omnidirectional antenna of this application has an “S”-shaped slot on its grounding arm. By adjusting the size and width of the “S”-shaped slot, the bandwidth can be effectively improved and the standing wave characteristics of the antenna can be optimized.

[0053] (5) The miniaturized broadband omnidirectional antenna of this application has an operating frequency range of 2.3GHz to 5.85GHz, a standing wave ratio of less than 1.8, and achieves a bandwidth of 87%. Its horizontal plane non-circularity can be + / -3dB.

[0054] In this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.

[0055] In this document, the directional terms such as front, back, top, and bottom are defined based on the location of the components in the accompanying drawings and their relative positions to each other, solely for the purpose of clarity and convenience in expressing the technical solution. It should be understood that the use of these directional terms should not limit the scope of protection claimed in this application.

[0056] Where there is no conflict, the above embodiments and features described herein can be combined with each other.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A miniaturized broadband omnidirectional antenna, characterized in that, It includes a base plate (1) and a grounding arm (2), a first radiating element (3), a second radiating element (4), a third radiating element (5) and a fourth radiating element (6) disposed on the same side of the base plate (1). The first radiating element (3) is spaced apart from the base plate (1). The first radiating element (3) is connected to the base plate (1) through the grounding arm (2). The second radiating element (4), the third radiating element (5) and the fourth radiating element (6) are all located between the first radiating element (3) and the base plate (1). The second radiating element (4) is connected to the first radiating element (3) and the third radiating element (5) respectively. The fourth radiating element (6) is connected to the third radiating element (5). The first radiating element (3) has a first through hole (31), and the second radiating element (4) is located on the side of the first through hole (31) away from the grounding arm (2), and the second radiating element (4) is aligned with the edge of the first through hole (31); the third radiating element (5) has a second through hole (51), and the fourth radiating element (6) is located on the side of the second through hole (51) away from the second radiating element (4), and the fourth radiating element (6) is aligned with the edge of the second through hole (51).

2. The miniaturized broadband omnidirectional antenna according to claim 1, characterized in that, The length direction of the grounding arm (2) is consistent with the width direction of the base plate (1). The grounding arm (2) is perpendicularly disposed at one end of the base plate (1). A slot (21) is provided on the grounding arm (2).

3. The miniaturized wideband omnidirectional antenna according to claim 2, characterized in that, The slot (21) is S-shaped.

4. The miniaturized wideband omnidirectional antenna according to claim 2, characterized in that, The first radiating element (3) and the base plate (1) are located on the same side of the grounding arm (2). The length direction of the first radiating element (3) is consistent with the length direction of the base plate (1). The first radiating element (3) is parallel to the base plate (1). One end of the first radiating element (3) is connected to the end of the grounding arm (2) away from the base plate (1).

5. The miniaturized wideband omnidirectional antenna according to claim 4, characterized in that, The second radiating element (4) is perpendicular to the first radiating element (3), and the length direction of the second radiating element (4) is consistent with the width direction of the first radiating element (3).

6. The miniaturized wideband omnidirectional antenna according to claim 5, characterized in that, The third radiating element (5) is located on the side of the second radiating element (4) near the grounding arm (2). The length direction of the third radiating element (5) is consistent with the length direction of the base plate (1). The third radiating element (5) is parallel to the base plate. One end of the third radiating element (5) is connected to the end of the second radiating element (4) away from the first radiating element (3).

7. The miniaturized broadband omnidirectional antenna according to claim 6, characterized in that, The fourth radiating element (6) is located between the third radiating element (5) and the base plate (1). The fourth radiating element (6) is perpendicular to the third radiating element (5), and the length direction of the fourth radiating element (6) is consistent with the width direction of the third radiating element (5).

8. The miniaturized wideband omnidirectional antenna according to claim 1, characterized in that, The base plate (1) has several fixing holes (11) and / or the side of the base plate (1) away from the radiation array is provided with double-sided adhesive.

9. The miniaturized broadband omnidirectional antenna according to claim 7, characterized in that, The base plate (1) has a coaxial welding mark (7) on one side where the radiating element is located and on the side of the fourth radiating element (6) near the grounding arm (2).

10. The miniaturized broadband omnidirectional antenna according to claim 1, characterized in that, The base plate (1), grounding arm (2), first radiating element (3), second radiating element (4), third radiating element (5) and fourth radiating element (6) are all stainless steel plate structures pre-plated with nickel.

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