A circular array for horizontally polarized omnidirectional indoor antenna

Abstract

The present application provides a circular array for horizontally polarized omnidirectional room antennas, which relates to the field of antenna technology, is used to reduce non-circularity and increase bandwidth, and includes a substrate and at least two antenna assemblies. The substrate has a first plane and a second plane. Each antenna assembly includes a first dipole arm, a second dipole arm and a feeding structure. Each first dipole arm and each second dipole arm are arranged on the first plane and the second plane at intervals along the circumferential direction, respectively. Each first dipole arm includes a first main body portion and a first bending portion connected to each other. Each second dipole arm includes a second main body portion and a second bending portion connected to each other, and each first main body portion and each second main body portion are connected to a corresponding feeding structure. In any two adjacent antenna assemblies, the orthographic projection of the first bending portion in the first antenna assembly toward the first plane at least partially overlaps with the orthographic projection of the second bending portion in the second antenna assembly toward the first plane.

Description

Technical Field

[0001] The present application relates to the field of antenna technology, and in particular to a circular array for horizontally polarized omnidirectional indoor antennas. Background Art

[0002] Horizontally polarized antennas are antennas with horizontal polarization. Omnidirectional indoor antennas can achieve uniform radiation within a 360-degree azimuth range and are widely used in mobile communications, radio frequency identification and other fields.

[0003] A circular array is usually formed by arranging multiple antenna units in a circular shape to achieve omnidirectional radiation.

[0004] However, with the development of mobile communications, the frequency bands used by communication systems are constantly expanding. The bandwidth of horizontally polarized omnidirectional antenna arrays is narrow, making it difficult to match multi-band communication systems. In addition, the non-circularity of horizontally polarized omnidirectional antenna arrays is too large, which limits the omnidirectional radiation performance of the circular array. Summary of the invention

[0005] The present application provides a circular array for horizontally polarized omnidirectional room antennas, which is used to reduce non-circularity, improve the omnidirectional radiation performance of the circular array, and increase the bandwidth of the antenna array to match a multi-band communication system.

[0006] In order to achieve the above objectives, this application provides the following technical solutions:

[0007] The present application provides a circular array for horizontally polarized omnidirectional indoor antenna, comprising:

[0008] A substrate having a first plane and a second plane arranged opposite to each other;

[0009] at least two antenna assemblies, each of the antenna assemblies comprising a first dipole arm, a second dipole arm, and a feed structure;

[0010] Each of the first dipole arms is arranged on the first plane at intervals along the circumferential direction, each of the first dipole arms comprises a first main body portion and a first bending portion which are connected, and each of the first main body portions is connected to the corresponding feeding structure;

[0011] Each of the second dipole arms is arranged on the second plane at intervals along the circumferential direction, each of the second dipole arms comprises a second main body portion and a second bending portion connected to each other, and each of the second main body portions is connected to the corresponding feeding structure;

[0012] In any two adjacent antenna assemblies, an orthographic projection of the first bending portion in one of the antenna assemblies toward the first plane at least partially overlaps with an orthographic projection of the second bending portion in the other of the antenna assemblies toward the first plane.

[0013] Based on the above technical solution, the present application can also be improved as follows.

[0014] In a possible implementation manner, the first end of the first main body is connected to the feeding structure, and the second end of the first main body extends toward the first direction;

[0015] The first ends of the second main body parts are connected to the feeding structure, and the second ends of the second main body parts extend toward a second direction, which is opposite to the first direction.

[0016] In a possible implementation manner, the first bending portion and the second bending portion are both bent toward the feeding structure;

[0017] Alternatively, both the first bending portion and the second bending portion are bent away from the feeding structure;

[0018] Alternatively, the first portion of the first bending portion and the first portion of the second bending portion are bent toward the feeding structure, and the second portion of the first bending portion and the second portion of the second bending portion are bent away from the feeding structure.

[0019] In a possible implementation, the feeding structure includes a feeding port, a first feeding line, and a second feeding line;

[0020] The feeding port has a feeding point on both the first plane and the second plane;

[0021] The first feeder is disposed on the first plane, a first end of the first feeder is connected to the feed point located on the first plane, and a second end of the first feeder is connected to the first main body;

[0022] The second feeder is disposed on the second plane, a first end of the second feeder is connected to the feed point located on the second plane, and a second end of the second feeder is connected to the second main body.

[0023] In a possible implementation manner, the first feeding line and the second feeding line constitute a balanced transmission line.

[0024] In a possible implementation manner, it is characterized in that the feeding structure further includes a balun structure, and the balun structure is arranged between the feeding port and the balanced transmission line.

[0025] In a possible implementation manner, an impedance adjustment device is provided between the first main body portion and the feeding structure, and between the second main body portion and the feeding structure.

[0026] In a possible implementation, the impedance adjustment device includes an inductor, a capacitor, or a matching branch.

[0027] In a possible implementation manner, the substrate is a dielectric substrate, and each of the antenna components is printed on the dielectric substrate.

[0028] In a possible implementation, the annular array for horizontally polarized omnidirectional room antennas further includes a power divider, wherein the power divider has a plurality of output interfaces, and each of the feeding structures is respectively connected to one of the output interfaces.

[0029] The circular array for horizontally polarized omnidirectional indoor antenna provided in the present application has the following beneficial effects:

[0030] The annular array for horizontally polarized omnidirectional room antenna provided by the present application includes a substrate and at least two antenna assemblies, wherein each antenna assembly includes a first dipole arm, a second dipole arm and a feeding structure. By arranging each first dipole arm on the first plane of the substrate at intervals along the circumferential direction, and arranging each second dipole arm on the second plane of the substrate at intervals along the circumferential direction, each antenna assembly forms an annular antenna array on the substrate. The first dipole arm includes a first main body portion and a first bending portion connected to each other, and the first main body portion is connected to the feeding structure, so that the first dipole arm is fed through the feeding structure. The second dipole arm includes a second main body portion and a second bending portion connected to each other, and the second main body portion is connected to the feeding structure, so that the second dipole arm is fed through the feeding structure.

[0031] By making the orthographic projection of the first bend in one of the antenna components toward the first plane at least partially overlap with the orthographic projection of the second bend in the other antenna component toward the first plane, the first bend of one of the antenna components and the second bend of the other antenna component form a coupling capacitor. Compared with the related art, the annular array provided by the present application tightly couples any two adjacent antenna components, reduces the radiation of the current in the first bend and the second bend, and shortens the distance between adjacent antenna components, so that a uniform annular current is formed in the annular array, reducing the non-circularity of the annular array. The tight coupling of any two adjacent antenna components can increase the equivalent length of the antenna component, so that the bandwidth of the annular array is expanded to the low frequency band to match the multi-band communication system. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are 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.

[0033] Figure 1 A schematic diagram of a three-dimensional structure of a circular array for a horizontally polarized omnidirectional indoor antenna provided in an embodiment of the present application;

[0034] Figure 2 A top view of a circular array for a horizontally polarized omnidirectional indoor antenna provided in an embodiment of the present application;

[0035] Figure 3 A schematic diagram of a partial structure of an antenna unit provided in an embodiment of the application;

[0036] Figure 4 A curve diagram of the voltage standing wave ratio of the annular array of horizontally polarized omnidirectional indoor antennas provided in an embodiment of the present application and the matched communication network frequency;

[0037] Figure 5 A graph showing the gain and azimuth angle of a circular array of horizontally polarized omnidirectional indoor antennas provided in an embodiment of the present application.

[0038] Description of reference numerals:

[0039] 10-Substrate;

[0040] 101- first plane; 102- second plane;

[0041] 20, 20a, 20b-antenna assembly;

[0042] 210 - first dipole arm; 211 - first main body; 212 - first bending portion;

[0043] 220 - second dipole arm; 221 - second main body; 222 - second bending portion;

[0044] 230-feeding structure; 231-feeding port; 232-first feeder line;

[0045] 233- Second feeder line. DETAILED DESCRIPTION

[0046] The circular array has technical problems of narrow bandwidth and large non-circularity. The reason for this problem is that there is a gap between the antenna components in the circular array, and the two ends of the dipole in the antenna component are open circuit. The current in the middle of the dipole is large, and the current at both ends is zero, which makes the current distribution in the circular array uneven, resulting in large non-circularity of the circular array, limiting the omnidirectional radiation performance of the circular array. The circular array adopts the design form of dipole antenna, which is a narrowband antenna, resulting in a narrow bandwidth of the circular array.

[0047] In response to the above technical problems, the embodiment of the present application provides a circular array for horizontally polarized omnidirectional room antennas, which tightly couples any two adjacent antenna components, reduces the radiation of the current in the first bend and the second bend, and closes the distance between adjacent antenna components, so that a uniform circular current is formed in the circular array, reducing the non-circularity of the circular array. Tight coupling of any two adjacent antenna components can increase the equivalent length of the antenna components, so that the bandwidth of the circular array is extended to the low frequency band to match the multi-band communication system.

[0048] In order to make the above-mentioned purposes, features and advantages of the embodiments of the present application more obvious and understandable, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of this application.

[0049] refer to Figure 1 and Figure 2 An embodiment of the present application provides a circular array for horizontally polarized omnidirectional room antennas. The circular array for horizontally polarized omnidirectional room antennas includes a substrate 10 and at least two antenna assemblies 20.

[0050] The substrate 10 is used to support and fix the antenna assembly 20. The substrate 10 has a first plane 101 and a second plane 102 that are arranged opposite to each other. Figure 1 The substrate 10 is a dielectric substrate, the first plane 101 and the second plane 102 are the front and back sides of the dielectric substrate respectively, and the antenna component 20 is fixed on the dielectric substrate by printing, patch or other forms.

[0051] It should be noted that the substrate 10 can also be other fixed structures. For example, the substrate 10 can be a metal plate or a plastic plate. The two opposite side surfaces of the metal plate or the plastic plate are respectively a first plane 101 and a second plane 102. The antenna assembly 20 is fixed on the metal plate or the plastic plate by welding, clamping, etc.

[0052] The number of antenna components 20 is at least two, for example, the number of antenna components 20 is two, three or more. Figure 1 and Figure 2 , the number of antenna assemblies 20 is twelve. Each antenna assembly 20 includes a first dipole arm 210 , a second dipole arm 220 and a feeding structure 230 .

[0053] like Figure 1 and Figure 2 As shown, each first dipole arm 210 is arranged on the first plane 101 at intervals along the circumferential direction. For example, each first dipole arm 210 is arranged at equal intervals, and each first dipole arm 210 surrounds to form a ring structure. The central axis of the ring structure can be the axis of the substrate 10. The number of first dipole arms 210 is the same as the number of antenna assemblies 20, for example, two, three or more. In the embodiment of the present application, the number of first dipole arms 210 is twelve.

[0054] like Figure 3 As shown, in any first dipole arm 210: the first dipole arm 210 includes a first main body 211 and a first bending portion 212, and the first bending portion 212 is connected to the first main body 211. The first end of the first main body 211 is connected to the feeding structure 230 in the first dipole arm 210, and the second end of the first main body 211 is connected to the first bending portion 212. It can be understood that the above connections are all electrical connections. Thus, the first main body 211 and the first bending portion 212 are fed through the feeding structure 230.

[0055] like Figure 1 and Figure 2 As shown, each second dipole arm 220 is arranged on the second plane 102 at intervals along the circumferential direction. For example, each second dipole arm 220 is arranged at equal intervals, and each second dipole arm 220 surrounds to form a ring structure. The central axis of the ring structure can be the axis of the substrate 10. The number of second dipole arms 220 is the same as the number of antenna assemblies 20, for example, two, three or more. In the embodiment of the present application, the number of second dipole arms 220 is twelve.

[0056] like Figure 3 As shown, in any second dipole arm 220: the second dipole arm 220 includes a second main body 221 and a second bending portion 222, and the second bending portion 222 is connected to the second main body 221. The first end of the second main body 221 is connected to the feeding structure 230 in the second dipole arm 220, and the second end of the second main body 221 is connected to the second bending portion 222. It can be understood that the above connections are all electrical connections. Thus, the second main body 221 and the second bending portion 222 are fed through the feeding structure 230.

[0057] like Figure 3 As shown, in any two adjacent antenna components 20, for example, two adjacent antenna components 20 are 20a and 20b. The orthographic projection of the first bending portion 212 in the antenna component 20a toward the first plane 101 partially or completely overlaps with the orthographic projection of the second bending portion 222 in the antenna component 20b toward the first plane 101. Thus, the first bending portion 212 in the antenna component 20a and the second bending portion 222 in the antenna component 20b form a coupling capacitor, and the adjacent antenna components 20a and 20b are tightly coupled.

[0058] The circular array for horizontally polarized omnidirectional room antenna provided in the embodiment of the present application tightly couples any two adjacent antenna components 20, thereby reducing the radiation of the current in the first bend 212 and the second bend 222, and shortens the distance between any two adjacent antenna components 20, so that a uniform circular current is formed in the circular array, and the non-circularity of the circular array is reduced. And by tightly coupling any two adjacent antenna components, the equivalent length of the antenna component 20 is increased, so that the bandwidth of the circular array is extended to the low frequency band to match the multi-band communication system.

[0059] like Figure 4 As shown, Figure 4 The horizontal axis is the frequency of the communication system that the circular array for horizontally polarized omnidirectional indoor antennas can match. The vertical axis is the voltage standing wave ratio of the circular array for horizontally polarized omnidirectional indoor antennas. The voltage standing wave ratio is the ratio of the standing wave antinode voltage to the node voltage amplitude. Its minimum value is 1 and its maximum value is infinity. When the voltage standing wave ratio is equal to 1, it means that all the energy is radiated by the antenna and there is no energy reflection loss. When the voltage standing wave ratio is infinite, it means that all the energy is reflected and no energy is radiated at all. Usually, when the voltage standing wave ratio is less than 2, the antenna can be used in the corresponding communication system. If Figure 4 As shown in the figure, the frequency range of the communication system corresponding to the voltage standing wave ratio less than 2 is between 2.15GHz and 4.27GHz, and the relative bandwidth is 66.0%. In the antenna array of the same length in the related art, the frequency range of the communication system corresponding to the voltage standing wave ratio less than 2 is between 4.15GHz and 4.57GHz, and the relative bandwidth is 9.63%. Therefore, reference Figure 4 Compared with the related art, the bandwidth of the annular array for horizontally polarized omnidirectional room antenna provided in the embodiment of the present application is extended in bandwidth frequency band and can match multi-band communication systems.

[0060] like Figure 5 As shown, Figure 5The horizontal axis is the azimuth, and the vertical axis is the normalized gain (Normalized Gain). The non-circularity is the difference between the maximum and minimum values ​​of the antenna gain. The circular array for horizontally polarized omnidirectional indoor antennas provided in the embodiment of the present application has non-circularities of 0.02dB, 0.13dB, and 0.40dB at 2GHz, 3GHz, and 4GHz, respectively. In the related art, the non-circularity of the same antenna array is 0.96dB. The non-circularity of the circular array for horizontally polarized omnidirectional indoor antennas provided in the embodiment of the present application in each frequency band is smaller than the non-circularity in the related art solution. Thereby providing radiation performance.

[0061] In some embodiments, Figure 3 As shown, the first end of the first main body 211 is connected to the feeding structure 230, and the second end of the first main body 211 extends toward the first direction. The second end of the first main body 211 extends in a circumferential direction, and the extension direction is toward the first direction, and the first direction can be counterclockwise or clockwise. It should be noted that the shape of the first main body 211 can be an arc, an approximately arc, a long strip, or an approximately long strip. In the embodiment of the present application, the shape of the first main body 211 is an arc.

[0062] like Figure 3 As shown, the first end of the second main body 221 is connected to the feeding structure 230, and the second end of the second main body 221 extends toward the first direction. The second end of the second main body 221 extends in the circumferential direction, and the extension direction is toward the second direction, and the second direction is opposite to the first direction, such as the first direction is clockwise and the second direction is counterclockwise. Or the first direction is counterclockwise and the second direction is clockwise. It should be noted that the shape of the second main body 221 can be an arc, an approximate arc, a long strip or an approximate long strip. In the embodiment of the present application, the shape of the second main body 221 is an arc. In this way, the flow direction of the current formed by the feeding structure 230 feeding into the first dipole arm 210 and the flow direction of the current formed by the feeding structure 230 feeding into the second dipole arm 220 are opposite, thereby forming a dipole antenna unit.

[0063] In some embodiments, Figure 3 As shown, in any antenna assembly 20, the first bending portion 212 and the second bending portion 222 are both bent toward the feeding structure 230. The first end of the first bending portion 212 is connected to the first main body 211, and the second end of the first bending portion 212 is bent toward the feeding structure 230, or the second end of the first bending portion 212 is bent toward the side of the first main body 211 close to the inside of the substrate 10. Figure 3As shown, the first end of the second bending portion 222 is connected to the second main body 221 , and the second end of the second bending portion 222 is bent toward the feeding structure 230 , or the second end of the second bending portion 222 is bent toward a side of the second main body 221 close to the inside of the substrate 10 .

[0064] Alternatively, in some other embodiments, in any antenna assembly 20, the first bending portion 212 and the second bending portion 222 are both bent away from the feeding structure 230. The first end of the first bending portion 212 is connected to the first main body 211, and the second end of the first bending portion 212 is bent away from the feeding structure 230, or the second end of the first bending portion 212 is bent toward the side of the first main body 211 close to the outer edge of the substrate 10. The first end of the second bending portion 222 is connected to the second main body 221, and the second end of the second bending portion 222 is bent away from the feeding structure 230, or the second end of the second bending portion 222 is bent away from the side of the second main body 221 close to the inside of the substrate 10.

[0065] Alternatively, in some other embodiments, in any antenna assembly 20, the first bending portion 212 and the second bending portion 222 both include a first portion and a second portion. The first portion of the first bending portion 212 is bent toward the feeding structure 230, and the second portion of the first bending portion 212 is bent away from the feeding structure 230. The first portion of the second bending portion 222 is bent toward the feeding structure 230, and the second portion of the second bending portion 222 is bent away from the feeding structure 230.

[0066] Such an arrangement can make the bending directions of the first bending portion 212 and the second bending portion 222 the same, making it convenient to partially or completely overlap the orthographic projection of the first bending portion 212 in the antenna component 20a toward the first plane 101 with the orthographic projection of the second bending portion 222 in the antenna component 20b toward the first plane 101.

[0067] In some embodiments, Figure 3 As shown, any feeding structure 230 includes a feeding port 231, a first feeding line 232 and a second feeding line 233. The feeding port 231 has a feeding point on both the first plane 101 and the second plane 102, and the feeding point is used to connect a feeding device to feed the first dipole arm 210 and the second dipole arm 220.

[0068] like Figure 3As shown, the first feeder 232 is disposed on the first plane 101. For example, the substrate 10 is a dielectric substrate, and the first feeder 232 is printed on the first plane 101 of the dielectric substrate in the form of a printed circuit board. The first end of the first feeder 232 is connected to the feeding point of the feeding port 231 on the first plane 101, and the second end of the first feeder 232 is connected to the first main body 211, so that the first main body 211 and the first bending portion 212 are fed through the first feeder 232, and a current is formed in the first dipole arm 210.

[0069] The second feeder 233 is disposed on the second plane 102. For example, the substrate 10 is a dielectric substrate, and the second feeder 233 is printed on the second plane 102 of the dielectric substrate in the form of a printed circuit board. A first end of the second feeder 233 is connected to a feeding point of a feeding port 231 on the second plane 102, and a second end of the second feeder 233 is connected to the second main body 221, so that the second feeder 233 feeds power to the second main body 221 and the second bending portion 222, thereby forming a current in the first dipole arm 210.

[0070] In some embodiments, the first feed line 232 and the second feed line 233 constitute a balanced transmission line. The first feed line 232 and the second feed line 233 are respectively the first conductor and the second conductor of the balanced transmission line. Figure 3 As shown, the first feeder line 232 and the second feeder line 233 are arranged in parallel. The balanced transmission line transmits signals through two parallel and oppositely directed wires, and has the advantages of strong anti-interference, long transmission distance and high transmission quality.

[0071] On the basis of the above embodiment, the feeding structure 230 also includes a balun structure, which is a broadband RF transmission line transformer that realizes the connection between a balanced transmission line circuit and an unbalanced transmission line circuit by converting a matching input into a differential output. The balun structure is arranged between the feeding port 231 and the balanced transmission line. For example, the first part of the balun structure is arranged between the first feeding line 232 and the feeding port 231, and the two ends of the first part of the balun structure are respectively connected to the first feeding line 232 and the feeding point of the feeding port 231 arranged on the first plane 101. The second part of the balun structure is arranged between the second feeding line 233 and the feeding port 231, and the two ends of the second part of the balun structure are respectively connected to the second feeding line 233 and the feeding point of the feeding port 231 arranged on the second plane 102.

[0072] When the type of the feeding device connected to the feeding point is unbalanced transmission, the unbalanced transmission is converted into balanced transmission through the balun structure, so that the unbalanced signal is connected to the balanced transmission line for long-distance transmission, which reduces the impact of noise and crosstalk.

[0073] In some embodiments, an impedance adjustment device is provided between the first main body 211 and the feeding structure 230, for example, an impedance adjustment device is provided between the first main body 211 and the first feeding line 232 in the feeding structure 230. An impedance adjustment device is provided between the second main body 221 and the feeding structure 230, for example, an impedance adjustment device is provided between the second main body 221 and the second feeding line 233 in the feeding structure 230. The impedance adjustment device can adjust the input impedance of the annular array, thereby improving the impedance matching of each frequency point. For example, the impedance adjustment device includes an inductor, a capacitor or a matching branch. Inductors, capacitors or matching branches are all commonly used impedance adjustment devices, which are low in cost and convenient for impedance adjustment.

[0074] In some embodiments, the substrate 10 is a dielectric substrate, the first plane 101 and the second plane 102 are respectively the front and back sides of the dielectric substrate, and each antenna assembly 20 is arranged on the dielectric substrate in the form of a printed circuit board. The dielectric substrate has low cost, and the process of the printed circuit board is mature, which facilitates the fixing of the antenna assembly 20 on the substrate 10.

[0075] In some embodiments, the annular array for horizontally polarized omnidirectional room antennas also includes a power divider, which is a device that divides one input signal energy into two or more outputs of equal or unequal energy. The power divider has multiple output interfaces, and the feeding structure 230 is connected to one of the output interfaces respectively. Thus, the signal energy is input to the feeding structures 230 in the multiple antenna assemblies 20. In the embodiment of the present application, the power divider is a one-way multi-way power divider, and the one-way multi-way power divider performs equal-radial and in-phase feeding on each feeding structure.

[0076] The various embodiments or implementation methods in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referenced to each other.

[0077] It should be noted that the phrases "in specific implementation", "in some embodiments", "in this embodiment", "exemplarily" and the like mentioned in the specification indicate that the described embodiment may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when describing specific features, structures or characteristics in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such features, structures or characteristics in conjunction with other embodiments that are explicitly or not explicitly described.

[0078] In general, terms should be understood, at least in part, by the context in which they are used. For example, the term "one or more" as used herein may be used to describe any feature, structure, or characteristic in a singular sense, or may be used to describe a combination of features, structures, or characteristics in a plural sense, depending, at least in part, on the context. Similarly, terms such as "a," "an," or "the" may also be understood to convey singular usage or to convey plural usage, depending, at least in part, on the context.

[0079] 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 technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features.

[0080] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0081] It should be easily understood that “on,” “above,” and “over” in the present disclosure should be interpreted in the broadest manner, so that “on” not only means “directly on something,” but also includes the meaning of “on something” with intervening features or layers therebetween, and “above” or “over” not only includes the meaning of “above” or “over,” but also may include the meaning of “above” or “over something” with no intervening features or layers therebetween (i.e., directly on something).

[0082] In addition, spatially relative terms, such as "below," "below," "beneath," "above," "above," etc., may be used herein for ease of description to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation shown in the figures. The device may have other orientations (rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein may likewise be interpreted accordingly.

[0083] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A circular array for horizontally polarized omnidirectional indoor antenna, characterized in that: include: A substrate (10), the substrate (10) having a first plane (101) and a second plane (102) arranged opposite to each other; At least two antenna assemblies (20), each of the antenna assemblies (20) comprising a first dipole arm (210), a second dipole arm (220) and a feeding structure (230); Each of the first dipole arms (210) is arranged on the first plane (101) at intervals along a circumferential direction, each of the first dipole arms (210) comprises a first main body portion (211) and a first bent portion (212) that are connected to each other, each of the first main body portions (211) is connected to a corresponding feeding structure (230), and each of the first bent portions (212) is open circuit; Each of the second dipole arms (220) is arranged on the second plane (102) at intervals along the circumferential direction, each of the second dipole arms comprises a second main body portion (221) and a second bent portion (222) which are connected to each other, each of the second main body portions (221) is connected to a corresponding feeding structure (230), and each of the second bent portions (222) is open circuit; In any two adjacent antenna components (20), an orthographic projection of the first bent portion (212) in one of the antenna components (20) toward the first plane (101) at least partially overlaps with an orthographic projection of the second bent portion (222) in the other of the antenna components (20) toward the first plane (101).

2. The circular array for horizontally polarized omnidirectional indoor antenna according to claim 1, characterized in that: The first end of the first main body portion (211) is connected to the feeding structure (230), and the second end of the first main body portion (211) extends towards a first direction; The first ends of the second main body parts (221) are connected to the feeding structure (230), and the second ends of the second main body parts (221) extend towards a second direction, and the second direction is opposite to the first direction.

3. The circular array for horizontally polarized omnidirectional indoor antenna according to claim 2, characterized in that: The first bending portion (212) and the second bending portion (222) are both bent towards the feeding structure (230); Alternatively, the first bent portion (212) and the second bent portion (222) are both bent away from the feeding structure (230); Alternatively, the first portion of the first bending portion (212) and the first portion of the second bending portion (222) are bent toward the feeding structure (230), and the second portion of the first bending portion (212) and the second portion of the second bending portion (222) are bent away from the feeding structure (230).

4. The circular array for horizontally polarized omnidirectional indoor antenna according to any one of claims 1 to 3, characterized in that: The feeding structure (230) comprises a feeding port (231), a first feeding line (232) and a second feeding line (233); The feeding port (231) has feeding points on both the first plane (101) and the second plane (102); The first feeder line (232) is arranged on the first plane (101), a first end of the first feeder line (232) is connected to the feed point located on the first plane (101), and a second end of the first feeder line (232) is connected to the first main body (211); The second feeder line (233) is arranged on the second plane (102), a first end of the second feeder line (233) is connected to the feeding point located on the second plane (102), and a second end of the second feeder line (233) is connected to the second main body (221).

5. The circular array for horizontally polarized omnidirectional indoor antenna according to claim 4, characterized in that: The first feed line (232) and the second feed line (233) constitute a balanced transmission line.

6. The circular array for horizontally polarized omnidirectional indoor antenna according to claim 5, characterized in that: The feeding structure (230) further comprises a balun structure, wherein the balun structure is arranged between the feeding port (231) and the balanced transmission line.

7. The circular array for horizontally polarized omnidirectional indoor antenna according to any one of claims 1 to 3, characterized in that: Impedance adjustment devices are provided between the first main body portion (211) and the feeding structure (230), and between the second main body portion (221) and the feeding structure (230).

8. The circular array for horizontally polarized omnidirectional indoor antenna according to claim 7, characterized in that: The impedance adjustment device includes an inductor, a capacitor or a matching branch.

9. The circular array for horizontally polarized omnidirectional indoor antenna according to any one of claims 1 to 3, characterized in that: The substrate (10) is a dielectric substrate (10), and each of the antenna components (20) is printed on the dielectric substrate (10).

10. The circular array for horizontally polarized omnidirectional indoor antenna according to any one of claims 1 to 3, characterized in that: It also comprises a power divider, the power divider having a plurality of output interfaces, and each of the feeding structures (230) is respectively connected to one of the output interfaces.

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