Dual-port omnidirectional antenna and communication equipment

Abstract

The utility model relates to the technical field of antenna structures, and provides a dual-port omnidirectional antenna, which comprises a dielectric substrate; the first antenna main body unit and the second antenna main body unit are arranged on the same surface of the dielectric substrate, the frequency bands of the first antenna main body unit and the second antenna main body unit are different, and the first antenna main body unit and the second antenna main body unit are arranged at intervals along the diagonal line of the dielectric substrate; the first antenna main body unit comprises a main body part and a first extension branch, the first extension branch bends and extends from one end, close to the second antenna main body unit, of the main body part and is spaced from the main body part to form a resonant filtering structure, and the resonant filtering structure is used for generating a radiation zero point in a corresponding frequency band of the second antenna main body unit; the second antenna main body unit is provided with a bending slot, the bending slot is used for generating a radiation zero point in a corresponding frequency band of the first antenna main body unit, and the dual-port omnidirectional antenna is beneficial to miniaturization, good in isolation and excellent in radiation performance.

Description

Technical Field

[0001] The present application relates to the technical field of antenna structures, and more specifically, to a dual-port omnidirectional antenna and communication equipment. Background Art

[0002] With the development of mobile communication technology, more and more electronic terminal devices choose built-in communication modules to share mobile communication technology and mobile communication networks. Due to the relationship between product form and cost, these electronic terminal devices not only require a smaller size, but also have high requirements for electrical performance, which brings great difficulties to the design of terminal antennas. Wi-Fi antennas are one of them. Usually, the isolation between antennas in different frequency bands is required to be greater than 20dB. This isolation requirement requires that the physical distance between different frequency antennas must be far enough. For small-sized terminal devices, it is difficult for their antenna solutions to achieve high isolation at a small distance. Therefore, the design of high-isolation antennas has always been a technical difficulty in the field of Wi-Fi antennas. Under the premise of not affecting the performance of the antenna, designing high-isolation antennas has important significance and practical value.

[0003] Among the antenna products currently on the market, there are two main design schemes for dual-band operation of 2G antennas and 5G antennas: one is to use a PCB, design the antenna as a dual-band antenna, and then divide it into two antennas through a duplexer on the main PCB board; the other is to design the 2G antenna and 5G antenna separately, and connect them to different RF links on the main board PCB to achieve dual-band operation. The first method requires the use of a filter with better performance to achieve higher isolation characteristics, and the second method requires the antenna to be placed far enough away to achieve higher isolation, which puts higher requirements on the antenna product space. At the same time, the cost of using two independent PCB antennas will also increase to a certain extent. Therefore, it is very difficult and of great practical value to design a miniaturized, high-isolation dual-port antenna on an antenna PCB board.

[0004] The difficulties in the design of miniaturized high-isolation dual-port omnidirectional antennas in the prior art are mainly the following two points: first, the antenna isolation is poor and it is difficult to meet the use requirements; second, the antenna radiation characteristics are deteriorated. The above two points are the main problems that currently restrict the design and application of high-isolation dual-port antennas on common PCB boards. Utility Model Content

[0005] The main purpose of the utility model is to provide a dual-port omnidirectional antenna, aiming to solve the technical problems of large size, poor isolation and poor radiation performance of high-isolation dual-port omnidirectional antenna in the prior art.

[0006] To achieve the above object, the technical solution adopted by the utility model is: a dual-port omnidirectional antenna, which includes:

[0007] dielectric substrate;

[0008] A first antenna main unit and a second antenna main unit are arranged on the same surface of the dielectric substrate, the first antenna main unit and the second antenna main unit have different frequency bands, and the first antenna main unit and the second antenna main unit are arranged at intervals along a diagonal line of the dielectric substrate;

[0009] The first antenna main body unit comprises a main body portion and a first extension branch, wherein the first extension branch bends and extends from the main body portion close to one end of the second antenna main body unit and is spaced from the main body portion to form a resonant filter structure, wherein the resonant filter structure is used to generate a radiation null point in a corresponding frequency band of the second antenna main body unit;

[0010] The second antenna main body unit is provided with a bending slot, and the bending slot is used to generate a radiation null point in a corresponding frequency band of the first antenna main body unit.

[0011] Further, the first antenna main body unit includes a first dipole arm and a second dipole arm connected to each other through a feeding structure, the first dipole arm is closer to the second antenna main body unit than the second dipole arm, and the second dipole arm is farther away from the second antenna main body unit than the first dipole arm.

[0012] Furthermore, the first dipole arm and the second dipole arm are arranged asymmetrically with respect to the feeding structure.

[0013] Further, the first dipole arm includes a first extended arm segment and a first connecting arm segment, the second dipole arm includes a second extended arm segment and a second connecting arm segment, the first extended branch is located in the first extended arm segment, the first connecting arm segment has a first inclined segment arranged obliquely with respect to the first extended arm segment, the second connecting arm segment has a second inclined segment arranged obliquely with respect to the second extended arm segment, and the first inclined segment and the second inclined segment are connected to each other through the feeding structure.

[0014] Furthermore, the first extension arm segment includes a first segment and a second segment connected to each other, the first extension branch is connected to the first segment, the second segment is connected to the first connecting arm segment, one end of the first segment in the length direction is connected to one end of the second segment in the length direction, and the width of the first segment is wider than the width of the second segment.

[0015] Furthermore, the second extension arm section is formed into a bent structure.

[0016] Furthermore, the second antenna main body unit includes a floor and a monopole arm, the floor is connected to the monopole arm via a feeding structure, the floor is closer to the first antenna main body unit than the monopole arm, and the monopole arm is farther away from the first antenna main body unit than the floor.

[0017] Furthermore, the dielectric substrate is rectangular.

[0018] Furthermore, the first antenna main unit is a 2G radiator, and the second antenna main unit is a 5G radiator.

[0019] In addition, the utility model also provides a communication device, wherein the communication device includes the above-mentioned dual-port omnidirectional antenna.

[0020] The dual-port omnidirectional antenna provided in this application has the following beneficial effects:

[0021] In the dual-port omnidirectional antenna provided by the embodiment of the utility model, firstly, by arranging the first antenna main body unit and the second antenna main body unit at intervals along the diagonal of the dielectric substrate, the physical distance between the first antenna main body unit and the second antenna main body unit can be maximized, thereby improving the isolation between the first antenna main body unit and the second antenna main body unit, reducing the length of the parallel part (projected overlapping part) of the first antenna main body unit and the second antenna main body unit, and the first antenna main body unit has a weaker reflection effect on the radiation field of the second antenna main body unit, and the second antenna main body unit obtains a better omnidirectional horizontal plane radiation pattern and a higher horizontal plane average gain; secondly, in the first antenna main body unit, the first extension branch extends from the main part close to one end of the second antenna main body unit and is spaced from the main part to form a resonant filtering structure. On the one hand, the first extension branch prolongs the current on the first antenna main unit, which is conducive to realizing the first On the one hand, the resonant filtering structure is used to generate a radiation zero point in the corresponding frequency band of the second antenna main unit, thereby improving the isolation between the first antenna main unit and the second antenna main unit in the corresponding frequency band of the second antenna main unit; finally, a bending slot is provided on the second antenna main unit. On the one hand, the bending slot changes and extends the current path of the second antenna main unit, which is conducive to the miniaturization of the second antenna main unit. On the other hand, the bending slot is used to generate a radiation zero point in the corresponding frequency band of the first antenna main unit, thereby improving the isolation between the first antenna main unit and the second antenna main unit in the corresponding frequency band of the first antenna main unit. In general, the miniaturization of the first antenna main unit and the second antenna main unit increases the physical distance between the first antenna main unit and the second antenna main unit, weakens the coupling effect, and further improves the radiation performance of the two antenna main units in their respective working frequency bands. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 A schematic plan view of a dual-port omnidirectional antenna provided by one embodiment of the present application;

[0024] Figure 2 A schematic plan view of a dual-port omnidirectional antenna provided by another embodiment of the present application;

[0025] Figure 3 A schematic plan view of a dual-port omnidirectional antenna provided by another embodiment of the present application;

[0026] Figure 4 A schematic plan view of a dual-port omnidirectional antenna provided by another embodiment of the present application;

[0027] Figure 5 A schematic plan view of a dual-port omnidirectional antenna provided by another embodiment of the present application;

[0028] Figure 6 A schematic plan view of a dual-port omnidirectional antenna provided by another embodiment of the present application;

[0029] Figure 7 An antenna simulation reflection coefficient curve diagram of a dual-port omnidirectional antenna provided in one embodiment of the utility model;

[0030] Figure 8 An antenna simulation transmission coefficient curve diagram of a dual-port omnidirectional antenna provided in one embodiment of the utility model;

[0031] Fig. 9 An efficiency curve diagram of a dual-port omnidirectional antenna provided by an embodiment of the utility model;

[0032] Fig.10 A 2D radiation pattern of the omnidirectional radiation surface of a dual-port omnidirectional antenna provided in one embodiment of the utility model;

[0033] Fig.11 The antenna radiation 3D pattern of the dual-port omnidirectional antenna in the 2450MHz frequency band provided by one embodiment of the utility model;

[0034] Fig.12 An embodiment of the present invention provides a dual-port omnidirectional antenna with a 3D radiation pattern in the 5500 MHz frequency band.

[0035] The reference numerals in the above drawings are as follows:

[0036] 1- dielectric substrate; 100- first antenna main unit;

[0037] 101-first extension branch; 102-first feeding port;

[0038] 103-first extension arm segment; 104-first connecting arm segment;

[0039] 105-second extension arm segment; 106-second connecting arm segment;

[0040] 107- first section; 108- second section;

[0041] 109- first segment; 110- second segment;

[0042] 111- second extension branch; 112- first extension branch;

[0043] 113-second extension branch; 200-second antenna main unit;

[0044] 201-bending slot; 202-floor;

[0045] 203-monopole arm; 204-second feeding port;

[0046] 205- rectangular slot; 206- small rectangular structure. DETAILED DESCRIPTION

[0047] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application clearer,

[0048] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0049] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0050] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0051] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0052] In order to illustrate the technical solution described in this application, a detailed description is given below in conjunction with specific drawings and embodiments.

[0053] See also Figure 1 The present invention provides a dual-port omnidirectional antenna, in particular, a miniaturized high-isolation dual-port omnidirectional antenna based on a single-sided PCB, which includes:

[0054] The dielectric substrate 1 may be made of FR-4. The dimensions of the entire antenna (length×width×thickness) may be 40 mm×20 mm×0.8 mm. Of course, the dimensions and materials are not limited to those in this embodiment.

[0055] A first antenna main unit 100 and a second antenna main unit 200 are arranged on the same surface of a dielectric substrate 1, the first antenna main unit 100 and the second antenna main unit 200 have different frequency bands, and the first antenna main unit 100 and the second antenna main unit 200 are arranged at intervals along a diagonal line of the dielectric substrate 1;

[0056] The first antenna main unit 100 includes a main body and a first extension branch 101. The first extension branch 101 is bent and extended from one end of the main body close to the second antenna main unit 200 and is spaced from the main body to form a resonant filter structure. The resonant filter structure is used to generate a radiation null in the corresponding frequency band of the second antenna main unit 200.

[0057] The second antenna main unit 200 is provided with a bending slot 201 , and the bending slot 201 is used to generate a radiation null point in a corresponding frequency band of the first antenna main unit 100 .

[0058] In the dual-port omnidirectional antenna provided by the embodiment of the utility model, firstly, by arranging the first antenna main body unit 100 and the second antenna main body unit 200 at intervals along the diagonal of the dielectric substrate 1, the physical distance between the first antenna main body unit 100 and the second antenna main body unit 200 can be as large as possible, thereby improving the isolation between the first antenna main body unit 100 and the second antenna main body unit 200, reducing the length of the parallel part (projected overlapping part) of the first antenna main body unit 100 and the second antenna main body unit 200, and the reflection effect of the first antenna main body unit 100 on the radiation field of the second antenna main body unit 200 is relatively weak, and the second antenna main body unit 200 obtains a good omnidirectional horizontal plane radiation pattern and a high horizontal plane average gain; secondly, in the first antenna main body unit 100, the first extension branch 101 is bent and extended from the main part close to one end of the second antenna main body unit 200 and is spaced from the main part to form a resonant filtering structure. On the one hand, the first extension branch 101 prolongs the current on the first antenna main body unit 100, which is conducive to realizing the first antenna main body The miniaturization of the unit 100, on the other hand, the resonant filtering structure is used to generate a radiation zero point in the corresponding frequency band of the second antenna main unit 200, thereby improving the isolation of the first antenna main unit 100 and the second antenna main unit 200 in the corresponding frequency band of the second antenna main unit 200; finally, a bending slot 201 is provided on the second antenna main unit 200. On the one hand, the bending slot 201 changes and extends the current path of the second antenna main unit 200, which is conducive to the miniaturization of the second antenna main unit 200. On the other hand, the bending slot 201 is used to generate a radiation zero point in the corresponding frequency band of the first antenna main unit 100, thereby improving the isolation of the first antenna main unit 100 and the second antenna main unit 200 in the corresponding frequency band of the first antenna main unit. In general, the miniaturization of the first antenna main unit 100 and the second antenna main unit 200 increases the physical distance between the first antenna main unit 100 and the second antenna main unit 200, weakens the coupling effect, and further improves the radiation performance of the two antenna main units in their respective working frequency bands.

[0059] The respective frequency bands of the first antenna main unit 100 and the second antenna main unit 200 can be flexibly designed as needed. According to an embodiment of the utility model, the first antenna main unit 100 is a 2G radiator, and the second antenna main unit 200 is a 5G radiator. Specifically, the interval (gap) between the first extension branch 101 and the main part is set to 1 / 4 of the wavelength corresponding to 5.5GHz, that is, the radiation zero point of the 5G frequency band (the working frequency band of the 5G frequency band is specifically 5.15GHz-5.85GHz, and 5.5GHz is preferred in this application) is introduced, and the size of the bending slot 201 can also be designed in a similar way to introduce the 2G frequency band radiation zero point, so that the dual-port omnidirectional antenna obtains higher port isolation in both the 2G frequency band and the 5G frequency band.

[0060] The dual-port omnidirectional antenna provided in the embodiment of the utility model adopts a single-layer PCB board design, and the 2G radiator and the 5G radiator are both printed on the front side (TOP layer) of the dielectric substrate 1.

[0061] The shape of the dielectric substrate 1 in the dual-port omnidirectional antenna provided in the embodiment of the utility model is not subject to any special restrictions. As a preferred embodiment, the dielectric substrate 1 is rectangular. The rectangle makes the shape of the dielectric substrate 1 more regular, and there is a long space in the diagonal direction of the rectangle, which is also convenient for arranging the first antenna main unit 100 and the second antenna main unit 200. If the dielectric substrate 1 is other shapes, such as an irregular shape, the diagonal of the dielectric substrate 1 can be understood as the line between the two ends of the outer contour of the dielectric substrate 1 that are farthest apart.

[0062] See also Figure 1 and Figure 4 According to an embodiment of the present invention, the first extension branch 101 can be bent along an arc, a right angle or an acute angle.

[0063] According to an embodiment of the present invention, the bending slot 201 can be formed into an S-shaped, Z-shaped or other structure that is bent at least twice, and is not limited to the S-shaped or Z-shaped structure.

[0064] According to a specific embodiment of the present utility model, the first antenna main body unit 100 can be in the form of a dipole antenna, including a first dipole arm and a second dipole arm connected to each other through a feeding structure (first feeding port 102), the first dipole arm is closer to the second antenna main body unit 200 than the second dipole arm, the second dipole arm is farther away from the second antenna main body unit 200 than the first dipole arm, and the first extension branch 101 is located at the first dipole arm. The main part of the first antenna main body unit 100 mentioned above refers to the first dipole arm, the second dipole arm and all other parts of the feeding structure mentioned here except the first extension branch 101.

[0065] According to a preferred embodiment of the utility model, the first dipole arm and the second dipole arm are arranged asymmetrically with respect to the feeding structure (first feeding port 102). The asymmetrical arrangement structure of the first antenna main unit 100 is more conducive to the first antenna main unit 100 being away from the second antenna main unit 200, thereby improving the isolation between the first antenna main unit 100 and the second antenna main unit 200.

[0066] See also Figure 1 and Figure 6According to an embodiment of the utility model, the first dipole arm includes a first extended arm segment 103 and a first connecting arm segment 104, the second dipole arm includes a second extended arm segment 105 and a second connecting arm segment 106, the first extended branch 101 is located in the first extended arm segment 103, the first connecting arm segment 104 has a first inclined segment arranged obliquely with respect to the first extended arm segment 103, the second connecting arm segment 106 has a second inclined segment arranged obliquely with respect to the second extended arm segment 105, the first inclined segment and the second inclined segment are connected to each other through a feeding structure (first feeding port 102), and the first inclined segment and the second inclined segment close to the first feeding port 102 are both arranged obliquely to ensure that the antenna feed line is not parallel to the first dipole arm and the second dipole arm, and the performance of the first antenna main unit 100 is not interfered with as much as possible. In addition, the first connecting arm segment 104 and the second connecting arm segment 106 can also be designed as other suitable structures such as right-angle bending structures.

[0067] According to one embodiment of the utility model, the first extension arm segment 103 includes a first segment 107 and a second segment 108 connected to each other, the first extension branch 101 is connected to the first segment 107, the second segment 108 is connected to the first connecting arm segment 104, one end of the first segment 107 in the length direction is connected to one end of the second segment 108 in the length direction, the width of the first segment 107 is wider than the width of the second segment 108, and the bandwidth of the first antenna main unit 100 can be widened. The first extension branch 112 (unlimited number) can also be extended from the second segment 108, and the first extension branch 112 can improve the antenna isolation characteristics.

[0068] See also Figure 1 , Figure 3 and Figure 4According to an embodiment of the utility model, the second extension arm section 105 is formed into a bent structure, which is conducive to miniaturization of the antenna, and can also reduce the length of the parallel part of the first antenna main unit 100 and the second antenna main unit 200, weaken the reflection effect of the first antenna main unit 100 on the electromagnetic waves radiated by the second antenna main unit 200, and improve the omnidirectional characteristics of the radiation pattern of the second antenna main unit 200. The second extension arm section 105 can specifically include two segments (a first segment 109 and a second segment 110) bent along an arc, a right angle or an acute angle, and the first segment 109 and the second segment 110 are connected. The connecting arm section 106 is connected, and a second extension branch 113 (unlimited number) can be extended from the first segment 109. The second extension branch 113 can improve the antenna isolation characteristics. The end of the second segment 110 away from the first segment 109 can also form a second extension branch 111 similar to the first extension branch 101, which is also conducive to the miniaturization of the antenna. The second extension branch 111 can also be bent along an arc, a right angle or an acute angle. Of course, the second extension branch 111 may not be set. The second segment 110 can also form a multi-segment structure with different widths similar to the first extension arm section 103.

[0069] According to a preferred embodiment of the utility model, while the first antenna main unit 100 and the second antenna main unit 200 are arranged at intervals along the diagonal of the dielectric substrate 1, the first antenna main unit 100 can be arranged along the edge of the dielectric substrate 1 as much as possible, thereby increasing the distance between the first antenna main unit 100 and the second antenna main unit 200 as much as possible on the dielectric substrate 1 with limited size.

[0070] According to one embodiment of the utility model, the second antenna main unit 200 includes a floor 202 and a monopole arm 203, the bending slot 201 can be specifically etched on the monopole arm 203, the floor 202 and the monopole arm 203 are connected through a feeding structure (second feeding port 204), the floor 202 is closer to the first antenna main unit 100 than the monopole arm 203, and the monopole arm 203 is farther away from the first antenna main unit 100 than the floor 202.

[0071] See also Figure 1 , Figure 2 and Figure 6According to a specific embodiment of the present invention, the second antenna main unit 200 is in the form of a monopole antenna, the floor 202 can be a rectangular structure, and a rectangular slot 205 can be designed near the second feeding port 204 to adjust the strength of the capacitive coupling between the floor 202 and the monopole arm 203. The monopole arm 203 can be designed as a trapezoidal structure that gradually widens in the direction away from the floor 202. A small rectangular structure 206 can be designed near the second feeding port 204 of the trapezoidal structure. The antenna impedance matching can be adjusted by adjusting the size of the rectangular structure. Of course, the present invention is not limited to the specific structural arrangement in this embodiment. For example, the outer contours of the floor 202 and the monopole arm 203 can be designed as an arc shape, etc., and the position of the second feeding port 204 can also be flexibly designed within a reasonable range.

[0072] Figure 7 A simulated reflection coefficient curve of a dual-port omnidirectional antenna provided by an embodiment of the utility model, from Figure 7 It can be seen that the reflection coefficient of the dual-port omnidirectional antenna is less than -10dB in the 2400-2500MHz frequency band and 5150-5850MHz; Figure 8 A curve diagram of the simulated transmission coefficient of a dual-port omnidirectional antenna provided by an embodiment of the utility model, from Figure 8 It can be seen that the dual-port omnidirectional antenna has an isolation speed of more than 26dB at the 2400MHz-2500MHz port and more than 28dB at the 5150MHz-5850MHz port. Fig. 9 The efficiency curve of the dual-port omnidirectional antenna provided by an embodiment of the utility model is as follows: Fig. 9 It can be seen that the simulated radiation efficiency of the dual-port omnidirectional antenna is greater than 92% within the working frequency band, and the radiation efficiency changes little with frequency; Fig.10 The 2D radiation pattern of the omnidirectional radiation surface of the dual-port omnidirectional antenna provided in one embodiment of the utility model is as follows: Fig.10 It can be seen that the average horizontal plane gain of the dual-port omnidirectional antenna at 2440MHz is close to 1.6dBi, and the average horizontal plane gain at 5500MHz is greater than 1.7dBi; Fig.11 and Fig.12 The dual-port omnidirectional antenna provided in one embodiment of the utility model has a 3D radiation pattern corresponding to the 2450MHz frequency band and the 5500MHz frequency band, from Fig.11 and Fig.12 It can be seen that the directional patterns of the antennas in each frequency band maintain good omnidirectional radiation characteristics without any directional pattern distortion.

[0073] In general, the dual-port omnidirectional antenna provided by the embodiment of the utility model has achieved high port isolation in both the 2G band and the 5G band when the PCB board size is only 40mm×20mm×0.8mm and without adding any lumped components. At the same time, the dual-port antenna has achieved high radiation efficiency and good omnidirectional radiation characteristics in both the 2G band and the 5G band. The isolation of the dual-port omnidirectional antenna in the 2G band can reach more than 26dB, and the isolation in the 5G band can reach more than 28dB. Compared with the dual-port conventional dipole antenna of the same size, its port isolation in the 2G band is improved by 6dB, and the port isolation in the 5G band is improved by 10dB. The radiation efficiency and omnidirectional radiation surface gain of the antenna are not inferior to those of conventional dipole antennas.

[0074] In addition, the utility model also provides a communication device, wherein the communication device includes the above-mentioned dual-port omnidirectional antenna, and the communication device can specifically be a wireless router and the like.

[0075] The above description is only an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A dual-port omnidirectional antenna, characterized in that: include: dielectric substrate; A first antenna main unit and a second antenna main unit are arranged on the same surface of the dielectric substrate, the first antenna main unit and the second antenna main unit have different frequency bands, and the first antenna main unit and the second antenna main unit are arranged at intervals along a diagonal line of the dielectric substrate; The first antenna main body unit comprises a main body portion and a first extension branch, wherein the first extension branch bends and extends from the main body portion close to one end of the second antenna main body unit and is spaced from the main body portion to form a resonant filter structure, wherein the resonant filter structure is used to generate a radiation null point in a corresponding frequency band of the second antenna main body unit; The second antenna main body unit is provided with a bending slot, and the bending slot is used to generate a radiation null point in a corresponding frequency band of the first antenna main body unit.

2. The dual-port omnidirectional antenna according to claim 1, characterized in that: The first antenna body unit includes a first dipole arm and a second dipole arm connected to each other through a feeding structure, the first dipole arm is closer to the second antenna body unit than the second dipole arm, and the second dipole arm is farther from the second antenna body unit than the first dipole arm.

3. The dual-port omnidirectional antenna according to claim 2, characterized in that: The first dipole arm and the second dipole arm are arranged asymmetrically with respect to the feeding structure.

4. The dual-port omnidirectional antenna according to claim 2, characterized in that: The first dipole arm comprises a first extended arm segment and a first connecting arm segment, the second dipole arm comprises a second extended arm segment and a second connecting arm segment, the first extended branch is located in the first extended arm segment, the first connecting arm segment has a first inclined segment arranged obliquely with respect to the first extended arm segment, the second connecting arm segment has a second inclined segment arranged obliquely with respect to the second extended arm segment, and the first inclined segment and the second inclined segment are connected to each other via the feeding structure.

5. The dual-port omnidirectional antenna according to claim 4, characterized in that: The first extension arm segment includes a first segment and a second segment connected to each other, the first extension branch is connected to the first segment, the second segment is connected to the first connecting arm segment, one end of the first segment in the length direction is connected to one end of the second segment in the length direction, and the width of the first segment is wider than the width of the second segment.

6. The dual-port omnidirectional antenna according to claim 4, characterized in that: The second extension arm section is formed into a bent structure.

7. The dual-port omnidirectional antenna according to claim 1, characterized in that: The second antenna main body unit includes a floor and a monopole arm, the floor is connected to the monopole arm through a feeding structure, the floor is closer to the first antenna main body unit than the monopole arm, and the monopole arm is farther from the first antenna main body unit than the floor.

8. The dual-port omnidirectional antenna according to any one of claims 1 to 7, characterized in that: The dielectric substrate is rectangular.

9. The dual-port omnidirectional antenna according to any one of claims 1 to 7, characterized in that: The first antenna main unit is a 2G radiator, and the second antenna main unit is a 5G radiator.

10. A communication device, characterized in that: The communication device comprises the dual-port omnidirectional antenna according to any one of claims 1 to 9.

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