Dual-frequency omnidirectional antenna and communication equipment

Abstract

The utility model provides a dual-frequency omnidirectional antenna and a communication device, the dual-frequency omnidirectional antenna comprises a substrate, and the substrate comprises a first surface and a second surface which are arranged back to back; the first antenna assembly is arranged on the first surface, the first antenna assembly comprises a first radiation assembly and a waveguide band, and the waveguide band is connected between part of the first radiation assembly and the feed source; the second antenna assembly is arranged on the second surface, the second antenna assembly comprises a second radiation assembly and coupling bands, and the coupling bands are parallel to at least part of the waveguide bands and are arranged at intervals in the arrangement direction of the first surface and the second surface, so that the coupling bands and the waveguide bands can be connected in a coupled mode; the coupling band is connected with the second radiation assembly to excite the second radiation assembly. The top-layer structure and the bottom-layer structure of the dual-frequency omnidirectional antenna provided by the utility model are connected through coupling, so that the processing difficulty is reduced, and the communication efficiency is improved.

Description

Technical Field

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

[0002] The dual-band omnidirectional antenna can operate in different frequency bands, which means that the dual-band antenna can simultaneously operate under different wireless communication standards or in different frequency bands under the same standard, and the dual-band omnidirectional antenna can transmit and receive signals in any direction orthogonal to its axis.

[0003] The dual-band omnidirectional antenna in the related art uses through-layer welding to connect the radiating element on the top layer of the antenna and the radiating element on the bottom layer of the antenna. The welding process is difficult to process, and the wiring structure after the welding process affects the efficiency of the dual-band communication. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide a dual-band omnidirectional antenna to solve the technical problems existing in the prior art that the dual-band omnidirectional antenna uses through-layer welding to connect the radiating element on the top layer of the antenna and the radiating element on the bottom layer of the antenna, the welding process is difficult to process, and the wiring structure after the welding process affects the dual-band communication efficiency.

[0005] To achieve the above purpose, the technical solution adopted in this application is: to provide a dual-frequency omnidirectional antenna, including:

[0006] A substrate, the substrate comprising a first surface and a second surface arranged opposite to each other; a first antenna component, the first antenna component is arranged on the first surface, the first antenna component comprises a first radiation component and a waveguide strip, the waveguide strip is connected between a feed source and a part of the first radiation component; a second antenna component, the second antenna component is arranged on the second surface, the second antenna component comprises a second radiation component and a coupling strip, the coupling strip is parallel to and spaced apart from at least a part of the waveguide strip along the arrangement direction of the first surface and the second surface, so that the coupling strip can be coupled to the waveguide strip, and the coupling strip is connected to the second radiation component to excite the second radiation component.

[0007] The beneficial effect of the dual-frequency omnidirectional antenna provided in the present application is that the first antenna component on one side of the substrate of the dual-frequency omnidirectional antenna provided in the present application excites the second antenna component on the other side of the substrate through coupling. Compared with the prior art, the first antenna component and the second antenna component of the dual-frequency omnidirectional antenna provided in the present application are not connected by welding perforations. On the one hand, it is only necessary to process the first antenna component on the first surface and the second antenna component on the second surface, which reduces the processing difficulty and processing cost. On the other hand, the impedance of the waveguide strip is made to have a smooth structural transition along its length direction, avoiding the discontinuity of the waveguide strip impedance caused by welding and affecting the integrity of the signal, thereby improving the communication efficiency of the dual-frequency omnidirectional antenna provided in the present application.

[0008] Optionally, the first radiation component includes a first radiation element and a second radiation element, the first radiation element is directly connected to the feed source, and the waveguide strip is connected between the second radiation element and the feed source;

[0009] And / or, the first radiation component includes a third radiation element, and at least a part of the third radiation element is coupled to the waveguide strip, so that the waveguide strip and the third radiation element are coupled and fed.

[0010] Optionally, the third radiation element is disposed between the first radiation element and the second radiation element, and the third radiation element includes a first radiation unit and a second radiation unit, the first radiation unit is arranged opposite to the first radiation element, and the second radiation unit is arranged opposite to the second radiation element;

[0011] The third radiation element further includes a third radiation unit, and the third radiation unit is disposed between the first radiation unit and the second radiation unit.

[0012] Optionally, the third radiation element also includes a coupling line, which is parallel to the waveguide strip and arranged at intervals, the first radiation unit is connected to one end of the coupling line, the second radiation unit is connected to the other end of the coupling line, and the third radiation unit is connected to the coupling line.

[0013] Optionally, the first radiation element is symmetrical with respect to the extension direction of the waveguide strip, the second radiation element is symmetrical with respect to the extension direction of the waveguide strip, and the third radiation element includes a first element and a second element that are symmetrical with respect to the extension direction of the waveguide strip.

[0014] Optionally, the first radiating element includes a plurality of first high-frequency branches and a plurality of first low-frequency branches, the plurality of first high-frequency branches are arranged in one-to-one correspondence with the first low-frequency branches, and the second radiating element includes a plurality of second high-frequency branches and a plurality of second low-frequency branches arranged in one-to-one correspondence with the plurality of second high-frequency branches;

[0015] The first radiation unit includes a plurality of third high-frequency branches and a plurality of third low-frequency branches arranged in one-to-one correspondence with the plurality of third high-frequency branches, and the second radiation unit includes a plurality of fourth high-frequency branches and a plurality of fourth low-frequency branches arranged in one-to-one correspondence with the plurality of fourth high-frequency branches;

[0016] The third radiation unit includes a plurality of first branches, and the second radiation component includes a plurality of second branches arranged in a one-to-one correspondence with the plurality of first branches.

[0017] Optionally, the first branch and the second branch extend in directions away from each other.

[0018] Optionally, the radiation frequency corresponding to the first high-frequency branch, the radiation frequency corresponding to the second high-frequency branch, the radiation frequency corresponding to the third high-frequency branch and the radiation frequency corresponding to the fourth high-frequency branch are the same, and the radiation frequency corresponding to the first low-frequency branch, the radiation frequency corresponding to the second low-frequency branch, the radiation frequency corresponding to the third low-frequency branch and the radiation frequency corresponding to the fourth low-frequency branch are the same and are all lower than the radiation frequency corresponding to the first high-frequency branch;

[0019] The radiation frequency corresponding to the first branch node is the same as the radiation frequency corresponding to the second branch node, and any one of the radiation frequency of the first high-frequency branch node and the radiation frequency of the first low-frequency branch node is the same as the radiation frequency of the first branch node.

[0020] Optionally, the waveguide strip includes an impedance transformation section, the impedance transformation section is located at one end of the waveguide strip close to the feed source, and the width of the impedance transformation section gradually increases in a direction toward the end connected to the feed source.

[0021] An embodiment of the present application further provides a communication device, which includes the dual-frequency omnidirectional antenna provided in any of the above embodiments. 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 creative labor.

[0023] Figure 1 A schematic diagram of the structure of a dual-frequency omnidirectional antenna provided in an embodiment of the present application;

[0024] Figure 2 A schematic diagram of the structure of a first antenna component of a dual-frequency omnidirectional antenna provided in an embodiment of the present application;

[0025] Figure 3 A schematic diagram of the structure of a third radiating element of a dual-band omnidirectional antenna provided in an embodiment of the present application;

[0026] Figure 4 A schematic diagram of the structure of a first radiating element and a second radiating element of a dual-frequency omnidirectional antenna provided in an embodiment of the present application;

[0027] Figure 5 A schematic diagram of the structure of one side of the second surface of the dual-frequency omnidirectional antenna provided in an embodiment of the present application;

[0028] Figure 6 A schematic diagram of the reflection coefficient of the dual-band omnidirectional antenna provided in an embodiment of the present application;

[0029] Figure 7 A schematic diagram of the radiation efficiency of the dual-band omnidirectional antenna provided in an embodiment of the present application;

[0030] Figure 8 A schematic diagram of the average gain of each frequency point of the dual-band omnidirectional antenna provided in an embodiment of the present application;

[0031] Fig. 9 The 3D radiation pattern of the dual-band omnidirectional antenna provided in the embodiment of the present application.

[0032] Among them, the reference numerals in the figure are:

[0033] 100. Dual-band omnidirectional antenna;

[0034] 10. substrate; 11. first surface; 12. second surface;

[0035] 20. First antenna component; 21. Waveguide strip; 211. Impedance transformation section; 212. Feed port; 22. First radiation component; 221. First radiation element; 2011. First high-frequency branch; 2012. First low-frequency branch; 2021. Second high-frequency branch; 2022. Second low-frequency branch; 222. Second radiation element; 2221. First element; 2222. Second element; 223. Third radiation element; 2231. First radiation unit; 2031. Third high-frequency branch; 2032. Third low-frequency branch; 2232. Second radiation unit; 2041. Fourth high-frequency branch; 2042. Fourth low-frequency branch; 2233. Third radiation unit; 2051. First branch; 2234. Coupled line;

[0036] 30. Second antenna component; 31. Coupling strip; 32. Second radiation component; 321. Second branch. DETAILED DESCRIPTION

[0037] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, 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.

[0038] It should be noted that when an element is referred to as being "fixed to" or "disposed 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.

[0039] 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.

[0040] 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.

[0041] See also Figure 1 Now, the dual-frequency omnidirectional antenna 100 provided in the embodiment of the present application is described. The dual-frequency omnidirectional antenna 100 includes a substrate 10, a first antenna component 20 and a second antenna component 30.

[0042] The substrate 10 includes a first surface 11 and a second surface 12 that are disposed opposite to each other. Specifically, the substrate 10 may be an insulating material with a relatively low dielectric constant, and the substrate 10 may be a thin-walled structure such as a flat plate or an arc, the first surface 11 is disposed on one side of the substrate 10 in the thickness direction, the second surface 12 is disposed on the other side of the substrate 10 in the thickness direction, and the first surface 11 and the second surface 12 are parallel to each other.

[0043] Preferably, the substrate is a long flat plate structure. Figures 1 to 5 The x direction in the figure is the length direction of the substrate 10. Figures 1 to 5 The y direction in FIG. 5 is the width direction of the substrate 10 .

[0044] The first antenna component 20 is disposed on the first surface 11 . The first antenna component 20 includes a first radiation component 22 and a waveguide strip 21 . The waveguide strip 21 is connected between a feed source (not shown in the figure) and a portion of the first radiation component 22 .

[0045] Specifically, the first antenna component 20 is a conductor, and the first antenna component 20 is completely located on one side of the first surface 11 of the substrate 10, and the waveguide strip 21 is arranged along the first surface 11 of the substrate 10. Figure 1 It extends in the x direction, a part of the first radiation component 22 is directly connected to the feed source, one end of the waveguide tape 21 can be directly connected to the feed source to conduct the electrical signal in the feed source to the waveguide tape 21, and another part of the first radiation component 22 is connected to the waveguide tape 21, so that the waveguide tape 21 can feed the current signal to another part of the first radiation component 22 to stimulate the other part of the first radiation component 22 to generate radio frequency radiation.

[0046] The second antenna component 30 is arranged on the second surface 12, and the second antenna component 30 includes a second radiation component 32 and a coupling band 31. The coupling band 31 is parallel to and spaced apart from at least part of the waveguide band 21 along the arrangement direction of the first surface 11 and the second surface 12, so that the coupling band 31 and the waveguide band 21 can be coupled and connected. The coupling band 31 is connected to the second radiation component 32 to excite the second radiation component 32.

[0047] Specifically, the second antenna component 30 is a conductor, and the second antenna component 30 is located as a whole on one side of the second surface 12 of the substrate 10. The coupling band 31 is parallel to and spaced apart from a portion of the waveguide band 21. When a current signal passes through the waveguide band 21, the coupling band 31 and the waveguide band 21 form a parallel double-line structure to generate a coupling current in the coupling band 31 and form a coupling current signal.

[0048] The second radiation element 32 is connected to the coupling strip 31 , so that the coupling strip 31 can feed the coupling current signal into the second radiation element 32 to stimulate the second radiation element 32 to generate radio frequency radiation.

[0049] The dual-frequency omnidirectional antenna 100 provided in the present application has a first antenna component 20 on one side of the substrate 10, and a second antenna component 30 on the other side of the substrate 10 is excited by coupling. Compared with the prior art, the first antenna component 20 and the second antenna component 30 of the dual-frequency omnidirectional antenna 100 provided in the present application are not connected by welding perforations. On the one hand, it is only necessary to process the first antenna component 20 on the first surface 11 and the second antenna component 30 on the second surface 12, which reduces the processing difficulty and processing cost. On the other hand, the impedance of the waveguide tape 21 is smoothly transitioned along its length direction, avoiding the impedance discontinuity of the waveguide tape 21 caused by welding that affects the integrity of the signal, thereby improving the communication efficiency of the dual-frequency omnidirectional antenna 100 provided in the present application.

[0050] In another embodiment of the present application, please refer to Figures 1 to 4 The first radiation component 22 includes a first radiation element 221, which is directly connected to the feed source, and the waveguide strip 21 is connected between the second radiation element 222 and the feed source.

[0051] Specifically, the first radiating element 221 is directly connected to the feed source, and the electrical signal in the feed source is transmitted to the first radiating element 221, forming electromagnetic oscillation in the first radiating element 221 to generate electromagnetic radiation.

[0052] like Figure 4 As shown, one end of the waveguide tape 21 forms a feeding port 212 suitable for connecting to a feed source, and the other end of the waveguide tape 21 is connected to the second radiating element 222, so that the waveguide tape 21 can conduct the electrical signal in the feed source to the second radiating element 222 to excite the second radiating element 222 to generate electromagnetic oscillations.

[0053] The first radiation component 22 includes a third radiation element 223 , and at least a portion of the third radiation element 223 is coupled to the waveguide strip 21 , so that the waveguide strip 21 and the third radiation element 223 are coupled and fed.

[0054] Specifically, at least part of the third radiating element 223 extends along the length direction of the waveguide tape 21 and has a set gap with the waveguide tape 21. During the conduction of the electrical signal in the feed source in the waveguide tape 21, a coupling current is formed in part of the third radiating element 223, thereby forming electromagnetic oscillations in the third radiating element 223 and generating electromagnetic radiation.

[0055] Thus, the second radiating element 222 is connected to the waveguide tape 21, the third radiating element 223 is coupled to the waveguide tape 21, and the first radiating element 221, the third radiating element 223 and the second radiating element 222 are arranged along the length direction of the waveguide tape 21 to form a series feeding structure to achieve higher purity omnidirectional radiation. The first radiating element 221 is directly fed with the feed source, and the third radiating element 223 is coupled and fed through the waveguide tape 21. Therefore, when the dual-band omnidirectional antenna 100 of the present application is working, on the one hand, the first radiating element 221 and the second radiating element have the advantage of good integrity of direct feeding signal transmission, avoiding signal distortion, and the first radiating element 221 also has the advantages of good frequency response characteristics, good response speed and amplitude linearity; on the other hand, the third radiating element 223 has the advantages of coupled feeding to facilitate the adjustment of input impedance and expand the antenna bandwidth, and has the advantage of strong anti-interference ability.

[0056] In another embodiment of the present application, the third radiation element 223 is disposed between the first radiation element 221 and the second radiation element 222 .

[0057] See also Figure 2 and Figure 3The third radiation element 223 includes a first radiation unit 2231 and a second radiation unit 2232 . The first radiation unit 2231 is arranged opposite to the first radiation element 221 , and the second radiation unit 2232 is arranged opposite to the second radiation element 222 .

[0058] Specifically, the third radiation element 223 is located between the first radiation element 221 and the second radiation element 222, the first radiation unit 2231 is arranged at one end of the third radiation element 223 close to the first radiation element 221, the second radiation unit 2232 is located at one end of the third radiation element 223 close to the second radiation element 222, and the first radiation unit 2231 extends in a direction away from the first radiation element 221, and the second radiation unit 2232 extends in a direction away from the second radiation element 222.

[0059] See also Figure 2 and Figure 3 The third radiation element 223 also includes a third radiation unit 2233 , and the third radiation unit 2233 is arranged between the first radiation unit 2231 and the second radiation unit 2232 .

[0060] Specifically, the third radiation unit 2233 extends along a side toward the first radiation unit 2231 , the second radiation component 32 is also disposed between the third radiation unit 2233 and the second radiation unit 2232 , and the second radiation component 32 extends along a side toward the second radiation unit 2232 .

[0061] Therefore, in the length direction of the waveguide strip 21, Figure 3 In the middle x direction, the first radiation element 221 and the second radiation element 222 are symmetrically arranged, the first radiation unit 2231 and the second radiation unit 2232 are symmetrically arranged and are both coupled to the waveguide belt 21, and the third radiation unit 2233 and the second radiation component 32 are symmetrically arranged and are both coupled to the waveguide belt 21.

[0062] In another embodiment of the present application, see Figure 3 The third radiation element 223 also includes a coupling line 2234, which is parallel to the waveguide strip 21 and arranged at intervals. The first radiation unit 2231 is connected to one end of the coupling line 2234, the second radiation unit 2232 is connected to the other end of the coupling line 2234, and the third radiation unit is connected to the coupling line 2234.

[0063] Specifically, the coupling line 2234 extends along the length direction of the waveguide tape 21 and is arranged at intervals from the waveguide tape 21 so that there is a gap of uniform width between the coupling line 2234 and the waveguide tape 21. When the electrical signal of the feed source is transmitted along the waveguide tape 21, a coupling current is generated in the coupling line 2234, and the first radiation unit 2231, the second radiation unit 2232 and the third radiation unit 2233 are all connected to the coupling line 2234. The coupling current in the coupling line 2234 excites the first radiation unit 2231, the second radiation unit 2232 and the third radiation unit 2233 to generate electromagnetic radiation.

[0064] Therefore, the coupling line 2234 and the waveguide strip 21 are in the same plane, and part of the electric field lines of the coupling line 2234 and the waveguide strip 21 are in the substrate 10 and part of them are in the air. The loss of electromagnetic waves in the air is smaller than that of the substrate 10, thereby reducing the energy loss of the second radiating element 222 and improving the radiation efficiency of the second radiating element 222, thereby improving the radiation efficiency of the dual-band omnidirectional antenna 100 described in the embodiment of the present application.

[0065] In another embodiment of the present application, please refer to Figure 3 and Figure 4 The first radiation element 221 is symmetrical about the extension direction of the waveguide tape 21 , the second radiation element 222 is symmetrical about the extension direction of the waveguide tape 21 , and the third radiation element 223 includes a first element 2221 and a second element 2222 that are symmetrical about the extension direction of the waveguide tape 21 .

[0066] Specifically, Figures 2 to 4 As shown, the shape of the first radiation element 221 is about Figure 2 The third radiation element 223 is symmetrical along the x-axis as shown in the figure, the third radiation element 223 includes a first element 2221 and a second element 2222 separated from each other, a portion of the first radiation unit 2231 is located in the first element 2221, another portion of the first radiation unit 2231 is located in the second element 2222, a portion of the second radiation unit 2232 is located in the first element 2221, another portion of the second radiation unit 2232 is located in the second element 2222, a portion of the third radiation unit 2233 is located in the first element 2221, another portion of the third radiation unit 2233 is located in the second element 2222, and the shapes of the first element 2221 and the second element 2222 are about Figure 3 The x-direction axis shown in FIG.

[0067] Therefore, the first radiation element 221, the third radiation element 223 and the second radiation element 222 are all along the extension direction of the waveguide strip 21, that is, Figure 2 The dual-frequency omnidirectional antenna 100 provided in the present application is symmetrical in the x direction, which, on the one hand, maintains the symmetry of the dual-frequency omnidirectional antenna 100, which helps to improve the radiation efficiency and impedance matching of the antenna, and on the other hand, makes the beams generated by the first radiating element 221, the third radiating element 223 and the second radiating element 222 also along the Figure 2The x-direction is symmetrical, so that the dual-frequency omnidirectional antenna 100 provided in the present application has good omnidirectional radiation characteristics.

[0068] In another embodiment of the present application, please refer to Figure 2 The first radiating element 221 includes a plurality of first high-frequency branches 2011 and a plurality of first low-frequency branches 2012, and the plurality of first high-frequency branches 2011 are arranged in one-to-one correspondence with the first low-frequency branches 2012. The second radiating element 222 includes a plurality of second high-frequency branches 2021 and a plurality of second low-frequency branches 2022 arranged in one-to-one correspondence with the plurality of second high-frequency branches 2021.

[0069] Specifically, the first radiating element 221 includes two first high-frequency branches 2011 and two first low-frequency branches 2012 . The first low-frequency branches 2012 are completely located on the side of the first high-frequency branches 2011 away from the second radiating element 222 to avoid mutual interference between the first low-frequency branches 2012 and the first high-frequency branches 2011 .

[0070] The length of the first high-frequency branch 2011 is smaller than the length of the first low-frequency branch 2012, so that the working frequency band of the first high-frequency branch 2011 is higher than the working frequency band of the first low-frequency branch 2012. Specifically, the first high-frequency branch 2011 can work in the 5G frequency band, and the first low-frequency branch 2012 can work in the 2G frequency band. Figure 2 The two first low-frequency branches are arranged symmetrically in the x direction. Figure 2 The first high frequency branch 2011 and the first low frequency branch 2012 are arranged symmetrically along the x direction. Figure 2 The middle portion extends parallel to the x direction away from the second radiation element 222 .

[0071] The second radiation element 222 includes two second high-frequency branches 2021 and two second low-frequency branches 2022 . The second low-frequency branches 2022 are completely located on a side of the second high-frequency branches 2021 away from the first radiation element 221 to avoid mutual interference between the second low-frequency branches 2022 and the second high-frequency branches 2021 .

[0072] The length of the second high-frequency branch 2021 is smaller than the length of the second low-frequency branch 2022, so that the working frequency band of the second high-frequency branch 2021 is higher than the working frequency band of the second low-frequency branch 2022. Specifically, the second high-frequency branch 2021 can work in the 5G frequency band, and the second low-frequency branch 2022 can work in the 2G frequency band. Figure 2 The two second low-frequency branches 2022 are arranged symmetrically in the x direction. Figure 2 The second high-frequency branch 2021 and the second low-frequency branch 2022 are arranged symmetrically along the x direction. Figure 2The x-direction extends parallel to a direction away from the first radiation element 221 .

[0073] The first radiation unit 2231 includes a plurality of third high-frequency branches 2031 and a plurality of third low-frequency branches 2032 arranged in one-to-one correspondence with the plurality of third high-frequency branches 2031 , and the second radiation unit 2232 includes a plurality of fourth high-frequency branches 2041 and a plurality of fourth low-frequency branches 2042 arranged in one-to-one correspondence with the plurality of fourth high-frequency branches 2041 .

[0074] Specifically, the first radiation unit 2231 includes two third high-frequency branches 2031 and two third low-frequency branches 2032 , and the third low-frequency branches 2032 are completely located on the side of the third high-frequency branches 2031 facing the second radiation unit 2232 to avoid mutual interference between the third low-frequency branches 2032 and the third high-frequency branches 2031 .

[0075] The length of the third high-frequency branch 2031 is smaller than the length of the third low-frequency branch 2032, so that the working frequency band of the third high-frequency branch 2031 is higher than the working frequency band of the third low-frequency branch 2032. Specifically, the third high-frequency branch 2031 can work in the 5G frequency band, and the third low-frequency branch 2032 can work in the 2G frequency band. Figure 2 The two third low-frequency branches 2032 are arranged symmetrically in the x direction. Figure 2 The third high frequency branch 2031 and the third low frequency branch 2032 are arranged symmetrically along the x direction. Figure 2 The x direction extends parallel to the direction toward the second radiation element 2232 .

[0076] The second radiation unit 2232 includes two fourth high frequency branches 2041 and two fourth low frequency branches 2042 . The fourth low frequency branches 2042 are completely located on the side of the fourth high frequency branches 2041 facing the first radiation unit 2231 to avoid mutual interference between the fourth low frequency branches 2042 and the fourth high frequency branches 2041 .

[0077] The length of the fourth high-frequency branch 2041 is smaller than the length of the fourth low-frequency branch 2042, so that the operating frequency band of the fourth high-frequency branch 2041 is higher than the operating frequency band of the fourth low-frequency branch 2042. Specifically, the fourth high-frequency branch 2041 can work in the 5G frequency band, and the fourth low-frequency branch 2042 can work in the 2G frequency band. Figure 2 The two fourth low-frequency branches 2042 are arranged symmetrically in the x direction. Figure 2 The fourth high frequency branch 2041 and the fourth low frequency branch 2042 are arranged symmetrically along the x direction. Figure 2 The x direction extends parallel to the direction toward the first radiation unit 2231 .

[0078] The third radiation unit 2233 includes a plurality of first branches 2051, such as Figure 1 and Figure 5 As shown, the second radiation element 32 includes a plurality of second branches 321 arranged in one-to-one correspondence with the plurality of first branches 2051 .

[0079] Specifically, the first branch 2051 and the second branch 321 have Figure 1 The same length size in the x direction is used to make the first branch 2051 and the second branch 321 have the same working frequency band. The third radiation unit 2233 includes two first branches 2051. The two first branches 2051 are about Figure 2 The second radiation component 32 is symmetrical in the x direction, and includes two second branches 321. The two second branches 321 are about Figure 2 The beam generated by the first branch 2051 and the beam generated by the second branch 321 are symmetrical along the x direction. Figure 2 Symmetrical in the x direction.

[0080] Therefore, the first radiating element 221, the second radiating element 222, the first radiating unit 2231 and the second radiating unit 2232 respectively include high-frequency branches and low-frequency branches, so that the dual-frequency omnidirectional antenna 100 of the present application can operate at different frequencies and realize the function of dual-frequency communication.

[0081] In another embodiment of the present application, see Figure 1 The first branch 2051 and the second branch 321 extend in directions away from each other.

[0082] Specifically, the first branch 2051 is located on the first surface 11 and extends in a direction away from the second branch 321, and the second branch 321 is located on the second surface 12 and extends in a direction away from the first branch 2051, so that the first branch 2051 and the second branch 321 do not overlap in the direction in the figure, so as to avoid mutual interference between the first branch 2051 and the second branch 321, and make the beam generated by the first branch 2051 and the beam generated by the second branch 321 along the direction about Figure 2 Symmetrical in the y direction.

[0083] In one embodiment of the present application, the radiation frequency corresponding to the first high-frequency branch 2011, the radiation frequency corresponding to the second high-frequency branch 2021, the radiation frequency corresponding to the third high-frequency branch 2031 and the radiation frequency corresponding to the fourth high-frequency branch 2041 are the same, and the radiation frequency corresponding to the first low-frequency branch 2012, the radiation frequency corresponding to the second low-frequency branch 2022, the radiation frequency corresponding to the third low-frequency branch 2032 and the radiation frequency corresponding to the fourth low-frequency branch 2042 are the same and are all lower than the radiation frequency corresponding to the first high-frequency branch 2011.

[0084] Specifically, see Figure 2 The first high frequency branch 2011 and the third high frequency branch 2031 have similar Figure 2 In terms of the length dimension in the x direction, the second high-frequency branch 2021 and the fourth high-frequency branch 2041 have similar length dimensions, so that the first high-frequency branch 2011, the second high-frequency branch 2021, the third high-frequency branch 2031 and the fourth high-frequency branch 2041 can all operate within the same frequency band.

[0085] The first low-frequency branch 2012 and the third low-frequency branch 2032 have similar Figure 2 In terms of the length dimension in the x direction, the second low-frequency branch 2022 and the fourth low-frequency branch 2042 have similar length dimensions, so that the first low-frequency branch 2012, the second low-frequency branch 2022, the third low-frequency branch 2032 and the fourth low-frequency branch 2042 can all operate within the same frequency band.

[0086] Preferably, the radiation frequency corresponding to the first high-frequency branch 2011, the radiation frequency corresponding to the second high-frequency branch 2021, the radiation frequency corresponding to the third high-frequency branch 2031 and the radiation frequency corresponding to the fourth high-frequency branch 2041 are all within the range of 5.15GHz-5.85GHz so that the first high-frequency branch 2011, the third high-frequency branch 2031, the second high-frequency branch 2021 and the fourth high-frequency branch 2041 can operate within the 5G frequency band.

[0087] The radiation frequency corresponding to the first low-frequency branch 2012, the radiation frequency corresponding to the second low-frequency branch 2022, the radiation frequency corresponding to the third low-frequency branch 2032 and the radiation frequency corresponding to the fourth low-frequency branch 2042 are all within the range of 2.4GHz-2.5GHz so that the first low-frequency branch 2012, the third low-frequency branch 2032, the second low-frequency branch 2022 and the fourth low-frequency branch 2042 can operate within the 2G frequency band.

[0088] The radiation frequency corresponding to the first branch 2051 is the same as the radiation frequency corresponding to the second branch 321 , and any one of the radiation frequency of the first high-frequency branch 2011 and the radiation frequency of the first low-frequency branch 2012 is the same as the radiation frequency of the first branch 2051 .

[0089] Specifically, the radiation frequency of the first branch 2051, that is, the radiation frequency of the second branch 321, is in the range of 5.15 GHz-5.85 GHz, so that the first branch 2051 and the second branch 321 can operate within the 5G frequency band.

[0090] As a result, the operating frequency range of the first high-frequency branch 2011, the third high-frequency branch 2031, the second high-frequency branch 2021 and the fourth high-frequency branch 2041 is different from the operating frequency range of the first low-frequency branch 2012, the third low-frequency branch 2032, the second low-frequency branch 2022 and the fourth low-frequency branch 2042, so that the dual-frequency omnidirectional antenna 100 of the present application can work in the 5G frequency band and the 2G frequency band at the same time, realizing the function of dual-frequency communication.

[0091] like Figure 7 As shown, the dual-band omnidirectional antenna 100 described in the embodiment of the present application has a radiation efficiency of more than 90% in the 2.4-2.5 GHz and 5.15-5.85 GHz frequency bands, and can reach a maximum of 95% in the WiFi-5G frequency band.

[0092] like Figure 8 As shown, the average gain of the dual-band omnidirectional antenna 100 of the present application at each frequency point in the 2G frequency band is more than 3.3dBi, and the average gain at each frequency point in the 5G frequency band is more than 5.3dBi. In addition, the average gain curve also shows that at each frequency point in the WiFi-2G and WiFi-5G frequency bands, the antenna has a highly consistent radiation characteristic.

[0093] And if Fig. 9 As shown, the dual-band omnidirectional antenna 100 of the present application has good omnidirectional radiation characteristics in the WiFi-2G and WiFi-5G frequency bands.

[0094] In one embodiment of the present application, see Figure 2 The waveguide strip 21 includes an impedance transformation section 211 , which is located at one end of the waveguide strip 21 close to the first radiation element 221 , and a width dimension of the impedance transformation section 211 gradually increases in a direction toward the first radiation element 221 .

[0095] Specifically, the impedance transformation section 211 is located at one end of the waveguide tape 21 connected to the feed source, and the width of the impedance transformation section gradually decreases in the direction away from the end of the waveguide tape 21 connected to the feed source, thereby being able to achieve impedance transformation over a wider frequency band, which is beneficial to the simultaneous optimization of 2G standing waves and 5G standing waves in the dual-band omnidirectional antenna 100 described in the present application.

[0096] Therefore, if Figure 6 As shown, the dual-band omnidirectional antenna 100 of the present application has an S11 of less than -10dB in the 2.4-2.5GHz frequency band and an S11 of less than -12dB in the 5.15-5.85GHz frequency band, and has good matching, and the standing wave margin in the 5G frequency band is particularly sufficient.

[0097] The present application also provides a communication device (not shown in the figure), which includes the dual-frequency omnidirectional antenna 100 described in any of the above embodiments.

[0098] The communication device provided in the present application adopts the dual-frequency omnidirectional antenna 100 described in any of the above embodiments. The first antenna component 20 on one side of the substrate 10 of the dual-frequency omnidirectional antenna 100 provided in the present application and the second antenna component 30 on the other side of the substrate 10 are connected by the coupling action of the waveguide belt 21 and the coupling belt 31. Compared with the prior art, the first antenna component 20 and the second antenna component 30 of the dual-frequency omnidirectional antenna 100 provided in the present application are not connected by welding perforations, so that the structural transition of the waveguide belt 21 along its length direction is smooth, and the drastic change of the impedance of the waveguide belt 21 along its length direction caused by welding is avoided, thereby improving the communication efficiency of the dual-frequency omnidirectional antenna 100 provided in the present application, thereby improving the communication efficiency of the communication device described in the present application.

[0099] The above are only preferred embodiments of the present application and are 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-frequency omnidirectional antenna, characterized in that: include: A substrate, the substrate comprising a first surface and a second surface disposed opposite to each other; A first antenna assembly, the first antenna assembly is disposed on the first surface, the first antenna assembly comprises a first radiation assembly and a waveguide strip, the waveguide strip is connected between a feed source and a portion of the first radiation assembly; A second antenna component, the second antenna component is arranged on the second surface, the second antenna component includes a second radiation component and a coupling belt, the coupling belt is parallel to at least part of the waveguide belt and is arranged at intervals along the arrangement direction of the first surface and the second surface, so that the coupling belt and the waveguide belt can be coupled and connected, and the coupling belt is connected to the second radiation component to excite the second radiation component.

2. The dual-frequency omnidirectional antenna according to claim 1, characterized in that: The first radiation component comprises a first radiation element and a second radiation element, the first radiation element is directly connected to the feed source, and the waveguide strip is connected between the second radiation element and the feed source; And / or, the first radiation component includes a third radiation element, and at least a part of the third radiation element is coupled to the waveguide strip, so that the waveguide strip and the third radiation element are coupled and fed.

3. The dual-frequency omnidirectional antenna according to claim 2, characterized in that: The third radiation element is disposed between the first radiation element and the second radiation element, and the third radiation element includes a first radiation unit and a second radiation unit, the first radiation unit is arranged opposite to the first radiation element, and the second radiation unit is arranged opposite to the second radiation element; The third radiation element further includes a third radiation unit, and the third radiation unit is disposed between the first radiation unit and the second radiation unit.

4. The dual-frequency omnidirectional antenna according to claim 3, characterized in that: The third radiation element also includes a coupling line, which is parallel to the waveguide strip and arranged at intervals, the first radiation unit is connected to one end of the coupling line, the second radiation unit is connected to the other end of the coupling line, and the third radiation unit is connected to the coupling line.

5. The dual-frequency omnidirectional antenna according to claim 2, characterized in that: The first radiation element is symmetrical with respect to the extension direction of the waveguide strip, the second radiation element is symmetrical with respect to the extension direction of the waveguide strip, and the third radiation element includes a first element and a second element that are symmetrical with respect to the extension direction of the waveguide strip.

6. The dual-frequency omnidirectional antenna according to claim 3, characterized in that: The first radiating element includes a plurality of first high-frequency branches and a plurality of first low-frequency branches, and the plurality of first high-frequency branches are arranged in one-to-one correspondence with the first low-frequency branches; the second radiating element includes a plurality of second high-frequency branches and a plurality of second low-frequency branches arranged in one-to-one correspondence with the plurality of second high-frequency branches; The first radiation unit includes a plurality of third high-frequency branches and a plurality of third low-frequency branches arranged in one-to-one correspondence with the plurality of third high-frequency branches, and the second radiation unit includes a plurality of fourth high-frequency branches and a plurality of fourth low-frequency branches arranged in one-to-one correspondence with the plurality of fourth high-frequency branches; The third radiation unit includes a plurality of first branches, and the second radiation component includes a plurality of second branches arranged in a one-to-one correspondence with the plurality of first branches.

7. The dual-frequency omnidirectional antenna according to claim 6, characterized in that: The first branch and the second branch extend in directions away from each other.

8. The dual-frequency omnidirectional antenna according to claim 6, characterized in that: The radiation frequency corresponding to the first high-frequency branch, the radiation frequency corresponding to the second high-frequency branch, the radiation frequency corresponding to the third high-frequency branch and the radiation frequency corresponding to the fourth high-frequency branch are the same, and the radiation frequency corresponding to the first low-frequency branch, the radiation frequency corresponding to the second low-frequency branch, the radiation frequency corresponding to the third low-frequency branch and the radiation frequency corresponding to the fourth low-frequency branch are the same and are all lower than the radiation frequency corresponding to the first high-frequency branch; The radiation frequency corresponding to the first branch node is the same as the radiation frequency corresponding to the second branch node, and any one of the radiation frequency of the first high-frequency branch node and the radiation frequency of the first low-frequency branch node is the same as the radiation frequency of the first branch node.

9. The dual-frequency omnidirectional antenna according to claim 3, characterized in that: The waveguide strip comprises an impedance transformation section, which is located at one end of the waveguide strip close to the feed source, and a width dimension of the impedance transformation section gradually increases in a direction toward an end connected to the feed source.

10. A communication device, characterized in that: It comprises a dual-band omnidirectional antenna according to any one of claims 1-9.

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