Omnidirectional antenna

Abstract

The utility model relates to an omnidirectional antenna, which comprises a mounting assembly and an antenna assembly, the antenna assembly comprises a first antenna and a plurality of second antennas, the first antenna is arranged on the mounting assembly, the plurality of second antennas are arranged on the mounting assembly around the first antenna, and the included angle between the axis of the second antenna and the axis of the first antenna is an acute angle or a right angle; according to the omnidirectional antenna, the first antenna and the plurality of second antennas are combined, so that when the first antenna realizes the effect of a monopole antenna, the plurality of second antennas can be matched to form the effect of a conical disc antenna, the overall gain of the antenna is further improved, and the effects of miniaturization and integration are achieved.

Description

Technical Field

[0001] This application relates to the technical field of communication antennas, and particularly to omnidirectional antennas. Background Art

[0002] An antenna is the air interface for a terminal device to connect to a network in a wireless communication system, and thus is one of the most critical components of the entire system. The quality of its performance directly determines the quality of communication. Omnidirectional antennas are widely used because they can uniformly radiate or receive radio signals in all directions on the horizontal plane.

[0003] The monopole antenna is the earliest invented, simplest in structure, and most widely used omnidirectional antenna. However, the gain of traditional monopole antennas is relatively low. Currently, in order to increase the gain, multiple units of monopole antennas are usually arranged in a linear array or formed into a planar array with a reflector plate placed behind to further improve the gain. However, the feeding network design of such array antennas is complex and the cost is relatively high. It is only suitable for wide-area networking coverage over a wide range, has high limitations in use, and cannot achieve the effects of miniaturization and integration. Summary of the Utility Model

[0004] Based on this, in view of the problem of the relatively low gain of the above-mentioned monopole antenna, it is necessary to provide an omnidirectional antenna.

[0005] An omnidirectional antenna, comprising:

[0006] An installation component;

[0007] An antenna component, including a first antenna and a plurality of second antennas. One axial end of the first antenna is connected to the installation component, and the other axial end of the first antenna extends in a direction away from the installation component;

[0008] One axial end of each second antenna is connected to the installation component, and the other axial end of each second antenna extends in a direction away from the installation component. The included angle between the central axis of the second antenna and the central axis of the first antenna is an acute angle or a right angle, and the plurality of second antennas are arranged around the first antenna.

[0009] In one embodiment, the antenna component further includes a plurality of third antennas. The plurality of third antennas are arranged around the first antenna on the installation component, and the included angle between the third antenna and the axis of the first antenna is an acute angle, and the included angle between the second antenna and the axis of the first antenna is a right angle.

[0010] In one embodiment, along the axial direction of the installation component, the second antenna is arranged between the first antenna and the third antenna.

[0011] In one embodiment, the mounting assembly includes a support member and a connecting member. The first antenna and the support member are respectively disposed on two axial sides of the connecting member, and both the first antenna and the support member are coaxial with the connecting member.

[0012] In one embodiment, a plurality of the second antennas are uniformly disposed on the connecting member around the axis of the first antenna.

[0013] In one embodiment, a plurality of the third antennas are uniformly disposed on the connecting member around the axis of the first antenna.

[0014] In one embodiment, the first antenna is detachably disposed on the mounting assembly; and / or, the second antenna is detachably disposed on the mounting assembly; and / or, the third antenna is detachably disposed on the mounting assembly.

[0015] In one embodiment, the first antenna is connected to the mounting assembly by a threaded fit; and / or, the second antenna is connected to the mounting assembly by a threaded fit; and / or, the third antenna is connected to the mounting assembly by a threaded fit.

[0016] In one embodiment, the second antenna is slidably disposed on the mounting assembly along the axis of the first antenna.

[0017] In one embodiment, the third antenna is disposed on the mounting assembly with an adjustable angle.

[0018] In the above omnidirectional antenna, by combining the first antenna and a plurality of second antennas, when the first antenna achieves the effect of a monopole antenna, a plurality of second antennas can cooperate to form the effect of a conical disk antenna, thereby improving the overall gain of the antenna and achieving the effects of miniaturization and integration. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of an omnidirectional antenna according to some embodiments of the present application.

[0020] Figure 2 is Figure 1 a partial enlarged view of part A of

[0021] Figure 3 is a schematic structural diagram of the omnidirectional antenna according to some embodiments of the present application from another perspective.

[0022] Figure 4 is Figure 3 a partial enlarged view of part B of

[0023] Figure 5 is the low-frequency classical radiation pattern of the omnidirectional antenna according to some embodiments of the present application.

[0024] Figure 6 This is the high-frequency classical radiation pattern of the omnidirectional antenna according to some embodiments of the present application.

[0025] Reference numerals:

[0026] 1. Mounting assembly; 11. Support member; 12. Connecting member;

[0027] 2. Antenna assembly; 21. First antenna; 22. Second antenna; 23. Third antenna. Detailed implementation manners

[0028] To make the above objects, features, and advantages of the present application more apparent and understandable, the following describes the detailed implementation manners of the present application with reference to the accompanying drawings. A lot of specific details are set forth in the following description to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0029] In the description of the present application, it should be understood that if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the accompanying drawings. These are only for convenience in 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 thus should not be construed as a limitation to the present application.

[0030] In addition, if there are terms such as "first" and "second", these terms are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, if there is a term "plural", the meaning of "plural" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0031] In this application, unless otherwise clearly specified and defined, if terms such as "installed", "connected", "joined", "fixed", etc. appear, these terms shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0032] In this application, unless otherwise clearly specified and defined, if there is a description such as the first feature being "on" or "under" the second feature, its meaning may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature is at a higher level than the second feature in terms of horizontal height. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature is at a lower level than the second feature in terms of horizontal height.

[0033] It should be noted that if a component is referred to as "fixed to" or "disposed on" another component, it may be directly on the other component or there may also be an intermediate component. If a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be an intermediate component at the same time. If so, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation.

[0034] An antenna is the air interface for a terminal device to connect to a network in a wireless communication system, so it is one of the most critical components of the entire system, and the quality of its performance directly determines the quality of communication. An omnidirectional antenna is an antenna that can uniformly radiate or receive radio signals in all directions on a horizontal plane. It shows uniform radiation of 360° in the horizontal radiation pattern, that is, it is usually said to be non-directional. The gain of an omnidirectional antenna usually does not exceed 9 dB because the smaller the lobe width, the greater the gain, and the design of the omnidirectional antenna makes it have a wide coverage range in the horizontal direction but a smaller coverage range in the vertical direction. Omnidirectional antennas are suitable for indoor wireless networks, radio and television, mobile communications and other scenarios, especially in cases where communication with devices in all directions is required.

[0035] The types of omnidirectional antennas include vertical antennas, monopole antennas, collinear antennas, whip antennas, and ground plane antennas. Among them, the monopole antenna is the earliest invented, simplest in structure, and most widely used omnidirectional antenna. It is a straight rod-shaped conductor vertically installed above the plane diagram. It is similar to half of a dipole antenna and can radiate the input signal in all directions perpendicular to the antenna length above the ground plane. However, the gain of traditional monopole antennas is relatively low. Currently, in order to improve the gain, multiple units of the monopole antenna are usually arranged in a linear array or formed into a planar array with a rear reflector to further improve the gain. However, the feeding network design of this array antenna is complex and costly, and it is only suitable for wide-area network coverage in a wide range. Its usage limitations are relatively high, and it cannot achieve miniaturization and integration effects.

[0036] Therefore, the present application provides an omnidirectional antenna that can combine a monopole antenna with a conical disk antenna to improve the gain while achieving miniaturization and integration effects.

[0037] Referring to Figure 1 and Figure 3 , an embodiment of the present application provides an omnidirectional antenna, which includes a mounting component 1 and an antenna component 2. Among them, the mounting component 1 is used to provide a mounting position for the antenna component 2 to assist the antenna component 2 in being mounted at a specified location.

[0038] Referring to Figures 1-4 , specifically, the antenna component 2 includes a first antenna 21 and a plurality of second antennas 22. The first antenna 21 is arranged on the mounting component 1, and the plurality of second antennas 22 are arranged around the first antenna 21 on the mounting component 1, and the included angle between the axis of the second antenna 22 and the axis of the first antenna 21 is an acute angle or a right angle.

[0039] Specifically, one axial end of the first antenna 21 is connected to the mounting component 1, and the other axial end of the first antenna 21 extends in a direction away from the mounting component 1. One axial end of each second antenna 22 is connected to the mounting component 1, and the other axial end of each second antenna 22 extends in a direction away from the mounting component 1, and the included angle between the central axis of the second antenna 22 and the central axis of the first antenna 21 is an acute angle or a right angle, and the plurality of second antennas 22 are arranged around the first antenna 21.

[0040] More specifically, the mounting assembly 1 includes a support member 11 and a connecting member 12. The first antenna 21 and the support member 11 are respectively disposed on the axial two sides of the connecting member 12, so that the support member 11 can support the connecting member 12 and the first antenna 21. The first antenna 21 and the support member 11 are both coaxial with the connecting member 12 to ensure the stability between the first antenna 21, the support member 11 and the connecting member 12 after the support member 11 is installed at the designated location. A plurality of second antennas 22 are uniformly arranged on the connecting member 12 around the axis of the first antenna 21 to ensure that the center of gravity of the omnidirectional antenna is located on the axis of the mounting assembly 1, thereby ensuring the stability of the omnidirectional antenna after installation.

[0041] In summary, for the omnidirectional antenna of the present application, by combining the first antenna 21 and the plurality of second antennas 22, when the first antenna 21 achieves the effect of a monopole antenna, the plurality of second antennas 22 can cooperate to form the effect of a discone antenna, thereby improving the overall gain of the antenna and achieving the effects of miniaturization and integration.

[0042] For the specific test results of the present application, reference can be made to Figure 5 and Figure 6 , where Figure 5 is the low-frequency classical radiation pattern of the omnidirectional antenna of the embodiment of the present application, Figure 6 and Figure 5 is the high-frequency classical radiation pattern of the omnidirectional antenna of the embodiment of the present application. It can be seen from Figure 6 that the omnidirectional antenna of the present application has a good gain effect.

[0043] It can be understood that a monopole antenna is a common type of antenna. It usually consists of a conductor perpendicular to the ground and a large ground plane, which can be an actual ground or a large conductive plane. The working principle of a monopole antenna is based on half of a dipole antenna, and its radiation characteristics are similar to those of a dipole antenna. However, due to only half of the structure, its gain is 3 dB higher than that of a dipole antenna. Monopole antennas are widely used in fields such as broadcast reception, mobile communication, and satellite communication.

[0044] A discone antenna is a special form of a monopole antenna. It consists of a disc and a cone and belongs to a broadband antenna. The design of the discone antenna enables its impedance bandwidth to reach 3 to 4 octaves when the VSWR (voltage standing wave ratio) is less than or equal to 2. It is usually used in the VHF (30 - 300 MHz) and UHF (300 - 3000 MHz) frequency bands. The size design of the discone antenna has an important impact on its performance. Parameters such as the slant height, the diameter of the disc, the diameters of the bottom and top of the cone, and the half-angle of the cone need to be considered during design.

[0045] The impedance bandwidth characteristic of the discone antenna benefits from its special geometric structure and asymmetric excitation method. When feeding, the disc is connected to the inner conductor of the coaxial cable, and the apex of the cone is connected to the outer conductor of the coaxial cable. This design enables the input impedance of the entire discone antenna to change little within the designed frequency band. The vertical plane (E-plane) radiation pattern of the discone antenna is similar to that of a common dipole antenna at low frequencies. At high frequencies, due to the disc becoming larger relative to the wavelength and generating reflections, the maximum radiation direction deviates from the horizontal plane and approaches the cone direction.

[0046] In practical applications, the selection between a monopole antenna and a discone antenna depends on the required operating frequency, bandwidth, gain, and physical space limitations. Monopole antennas are widely used due to their simplicity and omnidirectional radiation characteristics, while discone antennas are selected because of their broadband characteristics and performance advantages within a specific frequency range.

[0047] Therefore, by combining a monopole antenna with a discone antenna, the omnidirectional antenna of this application can enable the combined antenna to have the advantages of both the monopole antenna and the discone antenna, and while achieving the effects of miniaturization and integration, it can also improve the gain.

[0048] Refer to Figures 1-4 , in one embodiment, the antenna assembly 2 further includes a plurality of third antennas 23. The plurality of third antennas 23 are arranged around the first antenna 21 on the mounting assembly 1, and the angle between the axis of the third antenna 23 and the axis of the first antenna 21 is an acute angle, and the angle between the second antenna 22 and the axis of the first antenna 21 is a right angle. By adding a plurality of third antennas 23 and making the angle between the axis of the third antenna 23 and the axis of the first antenna 21 an acute angle, and the angle between the second antenna 22 and the axis of the first antenna 21 a right angle, the plurality of second antennas 22 and the plurality of third antennas 23 can cooperate to form a better discone antenna effect, thereby improving the overall gain of the antenna.

[0049] In one embodiment, along the axial direction of the mounting assembly 1, the second antenna 22 is arranged between the first antenna 21 and the third antenna 23 so that the second antenna 22 does not affect the normal installation of the first antenna 21 and the third antenna 23. Specifically, the first antenna 21 is coaxially connected to the mounting assembly 1, the second antenna 22 is perpendicularly connected to the mounting assembly 1, the third antenna 23 is obliquely connected to the mounting assembly 1, and the distance between the end of the third antenna 23 facing away from the mounting assembly 1 and the mounting assembly 1 increases as the distance from the second antenna 22 increases.

[0050] In one embodiment, the plurality of third antennas 23 are uniformly arranged on the connecting member 12 around the axial direction of the first antenna 21 to ensure that the center of gravity of the omnidirectional antenna is located on the axis of the mounting assembly 1, thereby ensuring the stability of the omnidirectional antenna after installation.

[0051] In addition, in the embodiments of the present application, the mounting assembly 1 includes a support member 11 and a connecting member 12 disposed on the support member 11. The first antenna 21, the second antenna 22, and the third antenna 23 are all disposed on the connecting member 12. The connecting member 12 is provided with a metal component, and the first antenna 21, the second antenna 22, and the third antenna 23 can be signal-connected through the metal component. The support member 11 can be selected as an insulating member to assist the installation of the connecting member 12 while ensuring the use effect of the antenna.

[0052] In one of the embodiments, the first antenna 21 is detachably disposed on the mounting assembly 1 for replacement according to requirements. The second antenna 22 is detachably disposed on the mounting assembly 1 for replacement according to requirements. The third antenna 23 is detachably disposed on the mounting assembly 1 for replacement according to requirements.

[0053] Specifically, the first antenna 21 is in threaded fit connection with the mounting assembly 1. The second antenna 22 is in threaded fit connection with the mounting assembly 1. The third antenna 23 is in threaded fit connection with the mounting assembly 1. More specifically, the mounting assembly 1 is provided with a first threaded groove, a plurality of second threaded grooves, and a plurality of third threaded grooves. The first antenna 21 is screwed into the first threaded groove, and the plurality of second antennas 22 are respectively screwed into the plurality of second threaded grooves, and the plurality of third antennas 23 are respectively screwed into the plurality of third threaded grooves.

[0054] In one of the embodiments, the second antenna 22 is slidably disposed on the mounting assembly 1 along the axial direction of the first antenna 21 to adjust the antenna gain effect at different frequencies. Specifically, a sliding seat is provided on the connecting member 12 of the mounting assembly 1. The sliding seat can slide on the connecting member 12 along the axial direction of the first antenna 21, and the second antenna 22 is disposed on the sliding seat. By sliding the sliding seat along the axial direction of the first antenna 21, the distance between the second antenna 22 and the first antenna 21 along the axial direction of the first antenna 21 is adjusted, thereby realizing the adjustment of the antenna gain effect at different frequencies.

[0055] In one of the embodiments, the third antenna 23 is disposed on the mounting assembly 1 with an adjustable angle to adjust the antenna gain effect at different frequencies. Specifically, a rotating seat is provided on the connecting member 12 of the mounting assembly 1. The rotating seat can rotate on the connecting member 12 relative to the axial direction of the first antenna 21, and the third antenna 23 is disposed on the rotating seat. By rotating the rotating seat relative to the axial direction of the first antenna 21, the angle between the third antenna 23 and the axial direction of the first antenna 21 is adjusted, thereby realizing the adjustment of the antenna gain effect at different frequencies.

[0056] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0057] The above-described embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. An omnidirectional antenna, characterized in that, Comprising: Mounting component; Antenna assembly, including a first antenna and a plurality of second antennas, one axial end of the first antenna is connected to the mounting component, and the other axial end of the first antenna extends in a direction away from the mounting component; One axial end of each second antenna is connected to the mounting component, and the other axial end of each second antenna extends in a direction away from the mounting component, and the included angle between the central axis of the second antenna and the central axis of the first antenna is an acute angle or a right angle, and the plurality of second antennas are arranged around the first antenna.

2. The omnidirectional antenna according to claim 1, characterized in that, The first antenna is detachably arranged on the mounting component; and / or, the second antenna is detachably arranged on the mounting component.

3. The omnidirectional antenna according to claim 1, characterized in that, The second antenna is slidably arranged on the mounting component along the axis of the first antenna.

4. The omnidirectional antenna according to claim 1, characterized in that, The antenna assembly further includes a plurality of third antennas, the plurality of third antennas are arranged around the first antenna on the mounting component, and the included angle between the third antenna and the axis of the first antenna is an acute angle, and the included angle between the second antenna and the axis of the first antenna is a right angle.

5. The omnidirectional antenna according to claim 4, characterized in that, The third antenna is arranged on the mounting component with an adjustable angle.

6. The omnidirectional antenna according to claim 4, characterized in that, Along the axis of the mounting component, the second antenna is arranged between the first antenna and the third antenna.

7. The omnidirectional antenna according to claim 4, characterized in that, The third antenna is detachably arranged on the mounting component.

8. The omnidirectional antenna according to claim 4, characterized in that, The first antenna is threadedly engaged and connected to the mounting component; and / or, the second antenna is threadedly engaged and connected to the mounting component; and / or, the third antenna is threadedly engaged and connected to the mounting component.

9. The omnidirectional antenna according to claim 4, characterized in that, The mounting component includes a support member and a connecting member, the first antenna and the support member are respectively arranged on two axial sides of the connecting member, and the first antenna and the support member are coaxial with the connecting member.

10. The omnidirectional antenna according to claim 9, wherein, The plurality of second antennas are evenly arranged on the connecting member around the axis of the first antenna; and / or, the plurality of third antennas are evenly arranged on the connecting member around the axis of the first antenna.

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