Omnidirectional indoor distributed antenna

Abstract

The present disclosure provides an omnidirectional indoor distributed antenna, comprising: a vertically-polarized antenna, the vertically-polarized antenna comprising a tapered single-arm element and a tapered reflection structure, and a small-diameter end of the single-arm element and a small-diameter end of the reflection structure being arranged opposite to each other; and a horizontally-polarized antenna, the horizontally-polarized antenna comprising, arranged on the reflection structure, a plurality of radiation units and a plurality of isolation structures, at least part of each radiation unit and at least part of each isolation structure being located on the side of the reflection structure facing the single-arm element, the plurality of isolation structures being arranged at intervals in the circumferential direction of the reflection structure, and the radiation units being located between every two adjacent isolation structures. The omnidirectional indoor distributed antenna in the present disclosure has the advantage of high degree of isolation between ports.

Description

Omnidirectional indoor antenna Technical Field

[0001] The present disclosure relates to the field of communication technology, and in particular to an omnidirectional indoor antenna. Background Art

[0002] With the rapid development of urban construction, residential density continues to increase. New buildings obstructing the coverage area of ​​existing macro base stations create new signal blind spots or weak signals, directly impacting wireless signal quality. This has led to the emergence of omnidirectional indoor antennas. Simultaneously, omnidirectional indoor antennas are developing towards multi-band and dual-polarization. However, dual-polarization, multi-band omnidirectional indoor antennas are prone to coupling between feed ports. Therefore, how to ensure good port isolation and higher gain in dual-port-fed, dual-polarization, multi-band omnidirectional indoor antennas has become a research hotspot.

[0003] Summary of the Invention

[0004] The present disclosure aims to solve at least one of the technical problems existing in the prior art and proposes an omnidirectional indoor antenna.

[0005] To achieve the above objectives, the present disclosure provides an omnidirectional indoor antenna, a vertically polarized antenna, the vertically polarized antenna comprising a conical single-arm dipole and a conical reflective structure, wherein the small-diameter end of the single-arm dipole and the small-diameter end of the reflective structure are arranged opposite to each other;

[0006] A horizontally polarized antenna, comprising a plurality of radiating units and a plurality of isolation structures arranged on the reflective structure, at least a portion of the radiating units and at least a portion of the isolation structures being located on a side of the reflective structure facing the single-arm oscillator, the plurality of isolation structures being arranged at circumferential intervals along the reflective structure, and the radiating unit being located between two adjacent isolation structures.

[0007] In which, the length of the isolation structure in the first direction is greater than or equal to the length of the radiation unit in the first direction, wherein the first direction is: the direction from the large diameter end of the reflection structure to the small diameter end of the reflection structure on the surface of the reflection structure facing the single-arm oscillator.

[0008] The minimum distance between the isolation structure and the small-diameter end of the reflective structure is less than or equal to the minimum distance between the radiation unit and the small-diameter end of the reflective structure; and / or

[0009] The minimum distance between the isolation structure and the large-diameter end of the reflective structure is less than or equal to the minimum distance between the radiation unit and the large-diameter end of the reflective structure.

[0010] The minimum distance between the surface of the isolation structure facing away from the reflective structure and the reflective structure is less than or equal to the minimum distance between the surface of the radiation unit facing away from the reflective structure and the reflective structure.

[0011] There is an isolation structure between two adjacent radiation units, and the minimum distances from the isolation structure to the two adjacent radiation units are the same.

[0012] In which, each of the isolation structures includes a first isolation retaining wall and a second isolation retaining wall, the first isolation retaining wall and the second isolation retaining wall are arranged on the surface of the reflecting structure facing the single-arm oscillator, and the extension direction of the positive projection of the first isolation retaining wall on the reflecting structure intersects with the extension direction of the positive projection of the second isolation retaining wall on the reflecting structure.

[0013] The distance between the first isolation retaining wall and the second isolation retaining wall gradually increases in a direction away from the small-diameter end of the reflective structure.

[0014] Wherein, one end of the first isolation retaining wall close to the small-diameter end of the reflective structure is connected to one end of the second isolation retaining wall close to the small-diameter end of the reflective structure.

[0015] Among them, each of the isolation structures also includes a third isolation retaining wall, which is arranged on the surface of the reflecting structure facing the single-arm oscillator, and the third isolation retaining wall is located on the side of the first isolation retaining wall and the second isolation retaining wall close to the small path end of the reflecting structure, and the first isolation retaining wall and the second isolation retaining wall are symmetrically distributed on both sides of the extension line of the third isolation retaining wall.

[0016] Wherein, the third isolation retaining wall is spaced apart from the first isolation retaining wall and the second isolation retaining wall; or

[0017] The first isolation retaining wall, the second isolation retaining wall and the third isolation retaining wall are an integrated structure.

[0018] Among them, when the third isolation retaining wall is spaced apart from the first isolation retaining wall and the second isolation retaining wall, the distance between the third isolation retaining wall and the first isolation retaining wall is less than 3 mm, and the distance between the third isolation retaining wall and the second isolation retaining wall is less than 3 mm.

[0019] Wherein, the isolation structure and the reflective structure are an integrated structure; or

[0020] The isolation structure is detachably connected to the reflective structure.

[0021] The isolation structure is detachably connected to the reflective structure, and the omnidirectional room antenna further includes a plurality of first insulating gaskets, which are arranged between at least a portion of the isolation structure and the reflective structure.

[0022] The isolation structure and the reflective structure are detachably connected, and each of the isolation structures further comprises:

[0023] a first connecting plate, the first connecting plate being detachably connected to the reflective structure, and the first isolation retaining wall being connected to the first connecting plate at an angle;

[0024] a second connecting plate, the second connecting plate being detachably connected to the reflective structure, the second isolation retaining wall being connected to the second connecting plate at an angle, and the first connecting plate and the second connecting plate being located between the first isolation retaining wall and the second isolation retaining wall;

[0025] A third connecting plate is detachably connected to the reflective structure, and the third isolation retaining wall is connected to the third connecting plate at an angle.

[0026] The isolation structure, the single-arm oscillator and the reflection structure are made of the same material.

[0027] The radiation unit includes a radiation patch and a guide patch, the radiation patch is connected to the reflective structure, the guide patch is opposite to the radiation patch and is spaced apart, and the guide patch is located on the side of the radiation patch away from the reflective structure.

[0028] The omnidirectional indoor antenna further includes a parasitic patch, which is located on a side of the radiation unit away from the small-path end of the reflective structure, and faces the radiation unit.

[0029] The minimum distance from the parasitic patch to the large-diameter end of the reflective structure is less than or equal to the minimum distance from the isolation structure to the large-diameter end of the reflective structure.

[0030] The minimum distance from the parasitic patch to the large-diameter end of the reflective structure is less than or equal to the minimum distance from the parasitic patch to the radiation unit.

[0031] The minimum distance between the surface of the parasitic patch facing away from the reflective structure and the reflective structure is greater than or equal to the minimum distance between the surface of the radiation unit facing away from the reflective structure and the reflective structure.

[0032] The parasitic patch, the single-arm oscillator and the reflective structure are made of the same material.

[0033] Wherein, the parasitic patch and the reflective structure are an integrated structure; or

[0034] The parasitic patch is detachably connected to the reflective structure.

[0035] Wherein, when the parasitic patch is detachably connected to the reflective structure, the omnidirectional room antenna further includes a plurality of second insulating gaskets, which are arranged between at least a portion of the parasitic patch and the reflective structure.

[0036] In which, the parasitic patch includes a first patch blocking wall, a second patch blocking wall and a third patch blocking wall connected to the reflective structure, the first patch blocking wall faces the radiation unit, the second patch blocking wall and the third patch blocking wall are respectively connected to the opposite sides of the first patch blocking wall, and the second patch blocking wall and the third patch blocking wall are located on the side of the first patch blocking wall away from the radiation unit.

[0037] In which, the surface of the reflecting structure facing the single-arm oscillator includes multiple mounting inclined surfaces, and the multiple mounting inclined surfaces are connected in sequence around the central axis of the reflecting structure. Each of the radiation units is correspondingly installed on each of the mounting inclined surfaces, and at least a portion of each of the isolation structures is located at the intersection of two adjacent mounting inclined surfaces.

[0038] In which, the surface of the reflecting structure facing the single-arm oscillator includes multiple connecting slopes, the mounting slope includes a first sub-slope and a second sub-slope, the first sub-slopes of two adjacent mounting slopes are connected, the connecting slope is located between the second sub-slopes of two adjacent mounting slopes and is connected to the second sub-slope, and at least a portion of the isolation structure is located on the connecting slope. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following detailed description, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0040] FIG1 shows a schematic structural diagram of an omnidirectional indoor antenna according to an optional embodiment of the present disclosure;

[0041] FIG2 shows the radiation pattern of the horizontally polarized antenna of the omnidirectional room antenna in FIG1 ;

[0042] FIG3 shows a comparison of the port isolation of the omnidirectional room antenna in FIG1 and the port isolation of the omnidirectional room antenna without an isolation structure.

[0043] FIG4 shows a schematic structural diagram of an omnidirectional indoor antenna according to another optional embodiment of the present disclosure;

[0044] FIG5 shows a schematic structural diagram of an omnidirectional indoor antenna according to another optional embodiment of the present disclosure;

[0045] FIG6 shows a schematic structural diagram of an omnidirectional indoor antenna according to another optional embodiment of the present disclosure;

[0046] FIG7 shows a schematic structural diagram of an omnidirectional indoor antenna according to another optional embodiment of the present disclosure;

[0047] FIG8 shows a schematic structural diagram of an omnidirectional indoor antenna according to another optional embodiment of the present disclosure;

[0048] FIG9 shows a schematic structural diagram of an omnidirectional indoor antenna according to another optional embodiment of the present disclosure;

[0049] FIG10 shows the radiation pattern of the horizontally polarized antenna of the omnidirectional room antenna in FIG9 ;

[0050] FIG11 shows the radiation pattern of the vertically polarized antenna of the omnidirectional room antenna in FIG9 ;

[0051] FIG12 shows a schematic structural diagram of an omnidirectional indoor antenna according to another optional embodiment of the present disclosure;

[0052] FIG13 shows the radiation pattern of the horizontally polarized antenna of the omnidirectional room antenna in FIG12;

[0053] FIG14 shows the radiation pattern of the vertically polarized antenna of the omnidirectional room antenna in FIG12;

[0054] FIG15 shows a schematic structural diagram of an omnidirectional indoor antenna according to another optional embodiment of the present disclosure;

[0055] FIG16 shows the radiation pattern of the horizontally polarized antenna of the omnidirectional room antenna in FIG15 ;

[0056] FIG17 shows the radiation pattern of the vertically polarized antenna of the omnidirectional room antenna in FIG15 ;

[0057] FIG18 shows a schematic structural diagram of an omnidirectional indoor antenna according to another optional embodiment of the present disclosure;

[0058] FIG19 shows a schematic structural diagram of an omnidirectional indoor antenna according to another optional embodiment of the present disclosure;

[0059] FIG20 shows a schematic structural diagram of an omnidirectional indoor antenna according to another optional embodiment of the present disclosure;

[0060] FIG21 shows the radiation pattern of a horizontally polarized antenna of an exemplary omnidirectional room antenna;

[0061] FIG22 shows the radiation pattern of a horizontally polarized antenna of another example of an omnidirectional room antenna;

[0062] FIG23 shows the radiation pattern of a vertically polarized antenna of another example of an omnidirectional indoor antenna.

[0063] 10. Single-arm oscillator; 20. Reflection structure; 21. Mounting slope; 211. First sub-slope; 212. Second sub-slope; 22. Mounting line; 23. Connecting slope; 30. Radiating unit; 31. Radiating patch; 32. Guide patch; 40. Isolation structure; 41. First end; 42. Second end; 43. First isolation retaining wall; 44. Second isolation retaining wall; 45. Third isolation retaining wall; 46. First connecting plate; 47. Second connecting plate; 48. Third connecting plate; 50. Parasitic patch; 51. First patch retaining wall; 52. Second patch retaining wall; 53. Third patch retaining wall. DETAILED DESCRIPTION

[0064] The following describes the specific embodiments of the present disclosure in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure and are not intended to limit the present disclosure.

[0065] To make the purpose, technical solutions, and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0066] Unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present disclosure should have the usual meanings understood by people with ordinary skills in the field to which the present disclosure belongs. The "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0067] As used herein, "parallel" and "perpendicular" include the conditions described and conditions similar to the conditions described, and the range of the similar conditions is within an acceptable deviation range, wherein the acceptable deviation range is determined by a person of ordinary skill in the art taking into account the measurement in question and the errors associated with the measurement of the specific quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallelism and approximate parallelism, wherein the acceptable deviation range for approximate parallelism can be, for example, a deviation within 5°; "perpendicular" includes absolute perpendicularity and approximate perpendicularity, wherein the acceptable deviation range for approximate perpendicularity can also be, for example, a deviation within 5°.

[0068] It will be understood that when a layer or element is referred to as being on another layer or substrate, it can be directly on the other layer or substrate, or intervening layers may be present therebetween.

[0069] Exemplary embodiments are described herein with reference to cross-sectional and / or plan views that are idealized exemplary drawings. In the drawings, the thicknesses of layers and regions are exaggerated for clarity. Therefore, variations in shape relative to the drawings due to, for example, manufacturing techniques and / or tolerances are contemplated. Therefore, the exemplary embodiments should not be construed as limited to the shapes of the regions shown herein, but rather include deviations in shape due to, for example, manufacturing. Therefore, the regions shown in the drawings are schematic in nature, and their shapes are not intended to illustrate the actual shape of regions of the device and are not intended to limit the scope of the exemplary embodiments.

[0070] FIG1 is a schematic structural diagram of an omnidirectional room antenna according to an optional embodiment of the present disclosure. As can be seen from FIG1 , the omnidirectional room antenna includes a vertically polarized antenna and a horizontally polarized antenna.

[0071] The vertically polarized antenna includes a tapered single-arm dipole 10 and a tapered reflector structure 20. The small-diameter end of the single-arm dipole 10 and the small-diameter end of the reflector structure 20 are arranged opposite each other. The tapered portions of the single-arm dipole 10 and the reflector structure 20 are arranged coaxially, forming an asymmetric pair of dipoles. The feed coaxial feeder provides power to the antenna, generating vertically polarized radiation.

[0072] The horizontally polarized antenna includes multiple radiating elements 30 and multiple isolation structures 40 disposed on a reflective structure 20. At least a portion of the radiating elements 30 and at least a portion of the isolation structures 40 are located on the side of the reflective structure 20 facing the single-arm dipole 10. The multiple isolation structures 40 are spaced circumferentially around the reflective structure 20, with the radiating elements 30 located between adjacent isolation structures 40. The multiple radiating elements are spaced circumferentially around the reflective structure 20 and fed by a feed coaxial cable, providing horizontally polarized radiation. The isolation structure 40 between adjacent radiating elements 30 reduces current coupling between the radiating elements 30, thereby improving the antenna radiation pattern and increasing the gain of the horizontally polarized antenna.

[0073] Because the reflective structure 20 that constitutes the vertically polarized antenna also serves as the ground plane for the radiating element 30 that constitutes the horizontally polarized antenna, the reflective structure 20 connects to the outer conductors of the feed coaxial cables of both the vertically polarized and horizontally polarized antennas. This affects the isolation between the feed ports of the vertically polarized antenna and the horizontally polarized antenna, causing current flowing through the reflective structure 20 to couple between the feed ports of the vertically polarized antenna and the horizontally polarized antenna. By providing multiple isolation structures 40 on the reflective structure 20, the isolation between the feed ports can be improved, reducing the risk of current coupling at the feed ports.

[0074] In some other optional embodiments, each radiation unit 30 has a plurality of isolation structures 40 arranged at intervals around its periphery.

[0075] In some optional embodiments, the length of the isolation structure 40 in the first direction is greater than or equal to the length of the radiating element 30 in the first direction, where the first direction is the direction from the large-diameter end of the reflective structure 20 to the small-diameter end of the reflective structure 20 on the surface of the reflective structure 20 facing the single-arm oscillator 10. This configuration provides the isolation structure 40 with a good isolation effect, further improving isolation and facilitating reduction of current coupling between the radiating elements 30.

[0076] It should be noted that if the length of the isolation structure 40 in the first direction is less than the length of the radiating elements 30 in the first direction, the isolation effect will be reduced and the risk of current coupling between the radiating elements 30 will be higher. Of course, the length of the isolation structure 40 in the first direction should be slightly longer than the length of the radiating elements 30 in the first direction, but not too long. Excessive length will affect the synthesis of the horizontally polarized antenna radiation pattern and affect the gain at large elevation angles. For example, the ratio of the length of the isolation structure 40 in the first direction to the length of the radiating elements 30 in the first direction is less than 1.25.

[0077] In some optional embodiments, referring to Figures 1 and 4 to 9 , the minimum distance between the first end 41 of the isolation structure 40 and the small-diameter end of the reflective structure 20 is less than or equal to the minimum distance between the radiating element 30 and the small-diameter end of the reflective structure 20. This arrangement can reduce current coupling generated on the side of the radiating element 30 close to the small-diameter end of the reflective structure 20, thereby improving the antenna radiation pattern.

[0078] In some optional embodiments, referring to Figures 1 and 4 to 9 , the minimum distance between the second end 42 of the isolation structure 40 and the large-diameter end of the reflective structure 20 is less than or equal to the minimum distance between the radiating element 30 and the large-diameter end of the reflective structure 20. This arrangement can reduce current coupling generated on the side of the radiating element 30 close to the large-diameter end of the reflective structure 20, thereby improving the antenna radiation pattern.

[0079] In some optional embodiments, referring to Figures 1 and 4 to 9 , the minimum distance between the surface of the isolation structure 40 facing away from the reflective structure 20 and the reflective structure 20 is less than or equal to the minimum distance between the surface of the radiating element 30 facing away from the reflective structure 20 and the reflective structure 20. This configuration helps reduce coupling between the radiating elements 30 while not affecting the radiation direction of the antenna.

[0080] In some optional embodiments, referring to Figures 1 and 4 to 9 , an isolation structure 40 is provided between two adjacent radiating elements 30, and the minimum distance from the isolation structure 40 to the two adjacent radiating elements 30 is the same. This arrangement allows adjacent isolation structures 40 to be located between two adjacent radiating elements 30 to avoid affecting the synthesis of the radiation patterns.

[0081] In some optional embodiments, the isolation structure 40 is an axisymmetric structure, and two adjacent radiation units 30 are symmetrical about the axis of symmetry of the isolation structure 40 .

[0082] In some optional embodiments, the isolation structure 40 should not affect the angle of the maximum radiation direction of the horizontally polarized antenna, so as to avoid affecting the synthesis of the radiation pattern.

[0083] In some optional embodiments, referring to Figures 1 and 4 to 9 , each isolation structure 40 includes a first isolation barrier 43 and a second isolation barrier 44. The first isolation barrier 43 and the second isolation barrier 44 are disposed on the surface of the reflective structure 20 facing the single-arm oscillator 10. The orthographic projection of the first isolation barrier 43 on the reflective structure 20 extends in a direction that intersects the orthographic projection of the second isolation barrier 44 on the reflective structure 20. This arrangement allows the first isolation barrier 43 and the second isolation barrier 44 of the same isolation structure 40 to isolate different radiating elements 30, effectively improving the isolation of the horizontally polarized antenna and further reducing the risk of current coupling between radiating elements 30.

[0084] In some optional embodiments, referring to Figures 1 and 4 to 9 , the distance between the first isolation barrier 43 and the second isolation barrier 44 gradually increases toward the direction away from the small-diameter end of the reflective structure 20. This arrangement allows the first isolation barrier 43 and the second isolation barrier 44 to approach the radiating elements 30 on either side, thereby reducing current coupling between adjacent radiating elements 30.

[0085] In some optional embodiments, referring to Figures 1 and 4 through 9 , the end of the first isolation barrier 43 proximal to the smaller diameter end of the reflective structure 20 is connected to the end of the second isolation barrier 44 proximal to the smaller diameter end of the reflective structure 20. This arrangement reduces current coupling in the gap between the first isolation barrier 43 and the second isolation barrier 44, thereby improving the isolation of the isolation structure 40. Furthermore, this arrangement facilitates the simultaneous installation of the first isolation barrier 43 and the second isolation barrier 44 onto the reflective structure 20.

[0086] In some optional embodiments, the first isolation retaining wall 43 and the second isolation retaining wall 44 are an integral structure.

[0087] In other optional embodiments, the first isolation retaining wall 43 and the second isolation retaining wall 44 are split structures, and the two are detachably connected. For example, the first isolation retaining wall 43 and the second isolation retaining wall 44 are connected by bolts; for another example, the first isolation retaining wall 43 and the second isolation retaining wall 44 are clamped.

[0088] In the specific embodiments shown in Figures 1, 3 to 8, the minimum distance from the first isolation retaining wall 43 to the large diameter end of the reflective structure 20 is less than or equal to the minimum distance from the radiation unit 30 to the small diameter end of the reflective structure 20; the minimum distance from the second isolation retaining wall 44 to the large diameter end of the reflective structure 20 is less than or equal to the minimum distance from the radiation unit 30 to the small diameter end of the reflective structure 20.

[0089] In some optional embodiments, referring to Figures 1 and 4 through 9 , each isolation structure 40 further includes a third isolation barrier 45. The third isolation barrier 45 is disposed on the surface of the reflective structure 20 facing the single-arm oscillator 10. The third isolation barrier 45 is located on the side of the first isolation barrier 43 and the second isolation barrier 44 that is close to the minor-path end of the reflective structure 20. The first isolation barrier 43 and the second isolation barrier 44 are symmetrically distributed on either side of the extension of the third isolation barrier 45. The third isolation barrier 45 further isolates two adjacent radiating elements 30, thereby further reducing current coupling between the two adjacent radiating elements 30. Furthermore, the two adjacent radiating elements 30 are symmetrically distributed on either side of the extension of the third isolation barrier 43 to avoid affecting the synthesis of the radiation patterns.

[0090] In some optional embodiments, the first isolation barrier 43, the second isolation barrier 44 and the third isolation barrier 45 are an integrated structure, which can ensure the isolation effect of the isolation structure 40 and is conducive to achieving the purpose of isolating current coupling.

[0091] In some optional embodiments, the third isolation barrier 45 is spaced apart from the first isolation barrier 43 and the second isolation barrier 44. The spacing between the third isolation barrier 45 and the first isolation barrier 43 is less than 3 mm, and the spacing between the third isolation barrier 45 and the second isolation barrier 44 is less than 3 mm. When the spacing between the third isolation barrier 45 and the first isolation barrier 43 and the second isolation barrier 44 is less than 3 mm, the radiation pattern synthesis is not affected and current coupling is reduced.

[0092] In some optional embodiments, the isolation structure 40 and the reflective structure 20 are an integral structure. For example, the isolation structure 40 and the reflective structure 20 can be integrally injection molded in an open mold manner.

[0093] In some other optional embodiments, the isolation structure 40 may be suspended and fixed above the reflective structure 20 .

[0094] In some other optional embodiments, the isolation structure 40 is detachably connected to the reflective structure 20. The isolation structure 40 and the reflective structure 20 can be fixed by screws, buckles, or the like.

[0095] In some optional embodiments, the isolation structure 40 and the reflective structure 20 are detachably connected, and the omnidirectional room antenna further includes a plurality of first insulating spacers (not shown), which are disposed between at least a portion of the isolation structure 40 and the reflective structure 20. Providing the first insulating spacers between the isolation structure 40 and the reflective structure 20 can reduce the impact on the antenna's intermodulation performance.

[0096] In some optional embodiments, the isolation structure 40 is detachably connected to the reflective structure 20, and each isolation structure 40 further includes a first connecting plate 46, a second connecting plate 47 and a third connecting plate 48. The first connecting plate 46 is detachably connected to the reflective structure 20, and the first isolation retaining wall 43 is connected to the first connecting plate 46 at an angle; the second connecting plate 47 is detachably connected to the reflective structure 20, and the second isolation retaining wall 44 is connected to the second connecting plate 47 at an angle, and the first connecting plate 46 and the second connecting plate 47 are located between the first isolation retaining wall 43 and the second isolation retaining wall 44; the third connecting plate 48 is detachably connected to the reflective structure 20, and the third isolation retaining wall 45 is connected to the third connecting plate 48 at an angle. The first isolation retaining wall 43 is connected to the reflective structure 20 through the first connecting plate 46, the second isolation retaining wall 44 is connected to the reflective structure 20 through the second connecting plate 47, and the third isolation retaining wall 45 is connected to the reflective structure 20 through the third connecting plate 48. The first connecting plate 46, the second connecting plate 47 and the third connecting plate 48 can be connected to the reflective structure 20 by snapping, gluing and threading.

[0097] In some optional embodiments, the isolation structure 40, the single-arm oscillator 10, and the reflective structure 20 are made of the same material. The isolation structure 40 can be made of the same metal material as the single-arm oscillator 10 and the reflective structure 20, such as aluminum, copper, or the like.

[0098] In some optional embodiments, referring to Figures 1 and 4 to 9 , the radiating unit 30 includes a radiating patch 31 and a guide patch 32. The radiating patch 31 is connected to the reflective structure 20, and the guide patch 32 is spaced apart from and opposite to the radiating patch 31. The guide patch 32 is located on the side of the radiating patch 31 facing away from the reflective structure 20. Multiple radiating patches 31 are placed in a circular array with equal spacing on the reflective structure 20, using air as the dielectric medium and fed by a coaxial cable. Each guide patch 32 is positioned opposite each radiating patch 31 and located above the radiating patch 31, thereby forming horizontally polarized radiation together with the radiating patch 31.

[0099] Figure 3 shows a comparison of the isolation performance of an omnidirectional room antenna with and without an isolation structure. The upper curve in Figure 3 shows the port isolation performance of the omnidirectional room antenna without the isolation structure 40, while the lower curve shows the port isolation performance of the omnidirectional room antenna with the isolation structure 40. As can be seen from Figure 3, the isolation between the feed ports is improved by 3dB after the isolation structure 40 is installed in the omnidirectional room antenna.

[0100] Figure 21 shows the radiation pattern of an omnidirectional room antenna in an example, where the omnidirectional room antenna in this example is an omnidirectional room antenna without an isolation structure. Figure 2 shows the radiation pattern of an omnidirectional room antenna in an embodiment of the present disclosure. From the comparison of Figure 2 and Figure 21, it can be seen that after the isolation structure is provided on the reflective structure 20, the horizontal polarization gain of the omnidirectional room antenna is improved, and the 2.5GHz beam width is also widened to a certain extent.

[0101] In the specific embodiment shown in Figure 1, the first isolation retaining wall 43 and the second isolation retaining wall 44 have the same shape. The first isolation retaining wall 43 and the second isolation retaining wall 44 are roughly rectangular plates. At the same time, the first isolation retaining wall 43 and the second isolation retaining wall 44 have a gap on the side facing away from the reflective structure 20.

[0102] In the specific embodiment shown in FIG. 4 , the first isolation retaining wall 43 and the second isolation retaining wall 44 have the same shape, and are rectangular plates.

[0103] In the specific embodiment shown in Figure 5, the first isolation retaining wall 43 and the second isolation retaining wall 44 have the same shape and are beveled branch panels. It should be noted that a beveled branch panel is a rectangular structure with an angle between one of the short sides and the long side, and the angle is not equal to 90°.

[0104] In the specific embodiment shown in FIG6 , the first isolation retaining wall 43 and the second isolation retaining wall 44 have the same shape and are hexagonal plates. It should be noted that the hexagonal plates are non-equilateral hexagons, with the bottom edge contacting the reflective structure 20 and the length of the bottom edge being greater than or equal to the top edge. Of course, in other embodiments, the hexagonal plates may be equilateral hexagons.

[0105] In the specific embodiment shown in FIG. 7 , the first isolation retaining wall 43 and the second isolation retaining wall 44 have the same shape. The first isolation retaining wall 43 and the second isolation retaining wall 44 are trapezoidal plates, and the short bottom sides of the trapezoidal plates are in contact with the reflective structure 20 .

[0106] In the specific embodiment shown in FIG. 8 , the first isolation retaining wall 43 and the second isolation retaining wall 44 have the same shape. The first isolation retaining wall 43 and the second isolation retaining wall 44 are semicircular plates, and the straight edges of the semicircular plates are in contact with the reflective structure 20 .

[0107] It should be noted that the shape of the third isolation retaining wall 45 may be the same as or different from the shapes of the first isolation retaining wall 43 and the second isolation retaining wall 44 , and no specific limitation is imposed herein.

[0108] In some optional embodiments, referring to Figures 9, 12, 15, 18 to 20, the omnidirectional indoor antenna further includes a parasitic patch 50, which is located on the side of the radiating element 30 facing away from the small-path end of the reflective structure 20, and faces the radiating element 30. In this embodiment, the parasitic patch 50 is disposed on the reflective structure 20. By disposing the parasitic patch 50 on the reflective structure 20, when the omnidirectional indoor antenna is excited, the current excited by the reflective structure 20 is induced on the parasitic patch, thereby lengthening the current path, making the current distribution uniform, and covering the weak current area, thereby affecting the synthesis of the horizontally polarized radiation pattern, thereby widening the beamwidth of the horizontally polarized antenna. At the same time, the parasitic patch 50 also radiates as a branch of the reflective structure 40, thereby improving the gain of the vertically polarized antenna.

[0109] It should be noted that the parasitic patch 50 facing the radiating element 30 means that the parasitic patch 50 is placed upright on the reflective structure 20, with the largest surface of the parasitic patch 50 facing the radiating element 30, and the parasitic patch 50 and the isolation structure 40 are arranged on three sides of the radiating element 30. The parasitic patch 50 can be connected to the reflective structure 20 or can be suspended and fixed above the reflective structure 20.

[0110] Of course, the parasitic patch 50 may also be provided on the radome, and no specific limitation is made here.

[0111] In some optional embodiments, referring to Figures 9, 12, 15, 18 to 20, the minimum distance from the parasitic patch 50 to the large diameter end of the reflective structure 20 is less than or equal to the minimum distance from the isolation structure 40 to the large diameter end of the reflective structure 20.

[0112] In some optional embodiments, referring to Figures 9, 12, 15, 18 to 20, the minimum distance from the parasitic patch 50 to the large diameter end of the reflective structure 20 is less than or equal to the minimum distance from the parasitic patch 50 to the radiation unit 30.

[0113] It should be noted that the position of the parasitic patch 50 can be reasonably set according to the relative positions of the radiating element 30 and the reflective structure 20. Since the current of the radiating element 30 is mainly distributed at the edge of the radiating element 30, and the current in the center of the radiating element 30 is relatively weak, the parasitic patch 50 should not be too far from the edge of the radiating patch 31, otherwise the synthetic effect on the horizontally polarized antenna pattern will be small. At the same time, the parasitic patch 50 cannot be too close to the radiating patch 31, otherwise the horizontally polarized antenna pattern will be distorted due to strong coupling. The specific position and size of the parasitic patch 50 can be reasonably set according to the position, size, and current distribution of the radiating patch 31. For example, the length of the parasitic patch 50 should not be too short, otherwise it will not affect the horizontally polarized antenna pattern; at the same time, the length of the parasitic patch 50 should not be too long, otherwise it will not block the radiation of the horizontally polarized antenna in the far field.

[0114] The number of parasitic patches 50 can be increased or decreased as needed to adjust the antenna performance. The shape of the parasitic patch 50 should be an axisymmetric figure.

[0115] In some optional embodiments, referring to Figures 9, 12, 15, and 18 to 20, the minimum distance between the surface of the parasitic patch 50 facing away from the reflective structure 20 and the reflective structure 20 is greater than the minimum distance between the surface of the radiating element 30 facing away from the reflective structure 20 and the reflective structure 20. This arrangement can better uniformize the current and reduce the occurrence of weak current areas.

[0116] It should be noted that the minimum distance between the surface of the parasitic patch 50 facing away from the reflective structure 20 and the reflective structure 20 should not be too large to avoid interference with the radome.

[0117] In some optional embodiments, the parasitic patch 50, the single-arm oscillator 10, and the reflective structure 20 are made of the same material. The parasitic patch 50 can be made of the same metal material as the single-arm oscillator 10 and the reflective structure 20, such as aluminum, copper, or the like.

[0118] In some optional embodiments, the parasitic patch 50 is an integral structure with the reflective structure 20. For example, the isolation structure 40 and the parasitic patch 50 can be integrally injection molded by using an open mold.

[0119] In some other optional embodiments, the isolation structure 40, the parasitic patch 50 and the reflective structure 20 are an integrated structure.

[0120] In some other optional embodiments, the parasitic patch 50 is detachably connected to the reflective structure 20. The parasitic patch 50 and the reflective structure 20 can be fixed by screws, buckles, or the like.

[0121] In some optional embodiments, the parasitic patch 50 is detachably connected to the reflective structure 20, and the omnidirectional room antenna further includes a plurality of second insulating spacers disposed between at least a portion of the parasitic patch 50 and the reflective structure 20. Providing the second insulating spacers between the parasitic patch 50 and the reflective structure 20 can reduce antenna intermodulation.

[0122] In some optional embodiments, the surface of the reflective structure 20 facing the single-arm oscillator 10 includes a plurality of inclined mounting surfaces 21, which are sequentially connected around the central axis of the reflective structure 20. Each radiating unit 30 is correspondingly mounted on each inclined mounting surface 21, and at least a portion of each isolation structure 40 is located at the intersection of two adjacent inclined mounting surfaces 21. The provision of multiple inclined mounting surfaces 21 facilitates the formation of a tapered surface after the multiple inclined mounting surfaces 21 are connected, which facilitates the installation of the isolation structure 40 while ensuring power feeding between the reflective structure 20 and the single-arm oscillator 10.

[0123] In some optional embodiments, a connection line between two adjacent attachment slopes 21 serves as a mounting line 22 , and a projection of at least a portion of each isolation structure 40 covers the mounting line 22 .

[0124] In some optional embodiments, the surface of the reflective structure 20 facing the single-arm oscillator 10 includes a plurality of connecting inclined surfaces 23. The mounting inclined surface 21 includes a first sub-inclined surface 211 and a second sub-inclined surface 212. The first sub-inclined surfaces 211 of two adjacent mounting inclined surfaces 21 are connected. The connecting inclined surface 23 is located between and connected to the second sub-inclined surfaces 212 of two adjacent mounting inclined surfaces 21. At least a portion of the isolation structure 40 is located on the connecting inclined surface 23. This arrangement facilitates determining the installation position of the isolation structure 40 and prevents the isolation structure 40 from affecting the synthesis of the horizontally polarized radiation pattern.

[0125] The parasitic patch 50 can have various shapes, which will be described in detail below with reference to the accompanying drawings.

[0126] In the specific embodiment shown in FIG. 9 , the parasitic patch 50 is a rectangular plate-shaped structure, and the largest surface of the rectangular plate-shaped structure faces the radiation unit 30 .

[0127] Figure 10 shows the radiation pattern of the horizontally polarized antenna of the omnidirectional room antenna in Figure 9; Figure 22 shows the radiation pattern of the horizontally polarized antenna of an example omnidirectional room antenna, in which the omnidirectional room antenna in this example is not provided with a parasitic patch 50. As can be seen from Figure 22, the horizontally polarized antenna of the omnidirectional room antenna without the parasitic patch has a wavelength of approximately 37.3° at 2.5 GHz. As can be seen from Figure 10, the horizontally polarized antenna of the omnidirectional room antenna with the parasitic patch 50 has a wavelength of approximately 47.6° at 2.5 GHz. A comparison of Figures 10 and 22 shows that by providing the parasitic patch 50 on the reflective structure 40, the wavelength of the horizontally polarized antenna is increased by 10°.

[0128] Figure 11 shows the radiation pattern of the vertically polarized antenna of the omnidirectional room antenna in Figure 9; Figure 23 shows the radiation pattern of the vertically polarized antenna of an example omnidirectional room antenna, in which the omnidirectional room antenna in this example is not provided with a parasitic patch 50. As can be seen from Figure 23, the gain of the vertically polarized antenna of the omnidirectional room antenna without the parasitic patch is approximately 4.1 dB at 2.5 GHz. As can be seen from Figure 11, the gain of the vertically polarized antenna of the omnidirectional room antenna after the parasitic patch 50 is loaded is approximately 4.5 dB at 2.5 GHz. A comparison of Figures 11 and 23 shows that by providing the parasitic patch 50 on the reflective structure 40, the gain of the vertically polarized antenna is increased by 0.4 dB.

[0129] In the specific embodiment shown in Figure 12, the parasitic patch 50 is a structure with recessed sides of a rectangular plate, that is, the two short sides of the rectangular plate are recessed toward the center of the rectangle, and the largest surface of the parasitic patch 50 faces the radiation unit 30.

[0130] Figure 13 shows the radiation pattern of the horizontally polarized antenna of the omnidirectional room antenna in Figure 12; Figure 22 shows the radiation pattern of the horizontally polarized antenna of an example omnidirectional room antenna, in which the omnidirectional room antenna in this example is not provided with a parasitic patch 50. As can be seen from Figure 22, the horizontally polarized antenna of the omnidirectional room antenna without the parasitic patch has a wavelength of approximately 37.3° at 2.5 GHz. As can be seen from Figure 13, the horizontally polarized antenna of the omnidirectional room antenna with the parasitic patch 50 has a wavelength of approximately 44.17° at 2.5 GHz. A comparison of Figures 13 and 22 shows that by providing the parasitic patch 50 on the reflective structure 40, the wavelength of the horizontally polarized antenna is increased by 7°.

[0131] Figure 14 shows the radiation pattern of the vertically polarized antenna of the omnidirectional room antenna in Figure 12; Figure 23 shows the radiation pattern of the vertically polarized antenna of an example omnidirectional room antenna, in which the omnidirectional room antenna in this example is not provided with a parasitic patch 50. As can be seen from Figure 23, the gain of the vertically polarized antenna of the omnidirectional room antenna without the parasitic patch is approximately 4.1 dB at 2.5 GHz. As can be seen from Figure 14, the gain of the vertically polarized antenna of the omnidirectional room antenna after the parasitic patch 50 is loaded is approximately 4.57 dB at 2.5 GHz. A comparison of Figures 14 and 23 shows that by providing the parasitic patch 50 on the reflective structure 40, the gain of the vertically polarized antenna is increased by 0.47 dB.

[0132] In the specific embodiment shown in FIG. 15 , the parasitic patch 50 is a rectangular plate with a recessed top, the top long side of the rectangular plate is recessed toward the center, and the largest surface of the parasitic patch 50 faces the radiation unit 30 .

[0133] Figure 16 shows the radiation pattern of the horizontally polarized antenna of the omnidirectional room antenna in Figure 15 ; Figure 22 shows the radiation pattern of the horizontally polarized antenna of an example omnidirectional room antenna, in which the parasitic patch 50 is not provided. As can be seen from Figure 22 , the horizontally polarized antenna of the omnidirectional room antenna without the parasitic patch has a wavelength of approximately 37.3° at 2.5 GHz. As can be seen from Figure 16 , the horizontally polarized antenna of the omnidirectional room antenna with the parasitic patch 50 provided has a wavelength of approximately 41.7° at 2.5 GHz. A comparison of Figures 16 and 22 shows that by providing the parasitic patch 50 on the reflective structure 40, the wavelength of the horizontally polarized antenna is increased by 4°.

[0134] Figure 17 shows the radiation pattern of the vertically polarized antenna of the omnidirectional room antenna in Figure 15 ; Figure 23 shows the radiation pattern of the vertically polarized antenna of an example omnidirectional room antenna, in which the parasitic patch 50 is not provided. As can be seen from Figure 23 , the gain of the vertically polarized antenna of the omnidirectional room antenna without the parasitic patch is approximately 4.1 dB at 2.5 GHz. As can be seen from Figure 17 , the gain of the vertically polarized antenna of the omnidirectional room antenna with the parasitic patch 50 is approximately 4.33 dB at 2.5 GHz. A comparison of Figures 17 and 23 shows that by providing the parasitic patch 50 on the reflective structure 40, the gain of the vertically polarized antenna is increased by 0.2 dB.

[0135] In the specific embodiment shown in FIG18 , the parasitic patch 50 is a hexagonal plate. It should be noted that the hexagonal plate is a non-equilateral hexagon, with the bottom edge in contact with the reflective structure 20 and the length of the bottom edge being greater than or equal to the top edge. Of course, in other optional embodiments, the hexagonal plate can be an equilateral hexagon.

[0136] In the specific embodiment shown in FIG19 , the parasitic patch 50 is a semicircular plate. It should be noted that the straight edge of the semicircular plate is in contact with the reflective structure 20 .

[0137] In some optional embodiments, referring to FIG. 20 , the parasitic patch 50 includes a first patch blocking wall 51, a second patch blocking wall 52, and a third patch blocking wall 53 connected to the reflective structure 20, the first patch blocking wall 51 faces the radiation unit 30, the second patch blocking wall 52 and the third patch blocking wall 53 are respectively located on two opposite sides of the first patch blocking wall 51 and connected, and the second patch blocking wall 52 and the third patch blocking wall 53 extend from the first patch blocking wall 51 in a direction away from the radiation unit 30.

[0138] The omnidirectional indoor antenna disclosed herein utilizes a radiating patch 31 and a guiding patch 32 positioned opposite each other. A double-layer patch achieves horizontally polarized radiation, while a single-arm dipole 10 and a reflective structure 20 achieve vertically polarized radiation. The placement of an isolation structure 40 between adjacent radiating elements 30 reduces current dissipation, thereby reducing coupling between radiating elements 30 and improving antenna performance. Furthermore, the addition of parasitic patches 50 around the radiating elements 30 extends the current path, further enhancing antenna performance.

[0139] Compared with reducing the coupling between the radiation units 30 by changing the spacing and arrangement of the radiation units 30, the present disclosure can improve the antenna performance while maintaining the original antenna radiation pattern shape.

[0140] Compared with adopting a radiation unit 30 with higher gain, the present disclosure does not need to consider changing the original design structure, and has the advantages of simple design and low cost.

[0141] Compared to increasing the isolation between ports by loading a dielectric substrate onto the radiation patch 31, the present disclosure uses air as the patch medium, which has higher radiation efficiency and lower cost. The omnidirectional indoor antenna proposed in the present disclosure has the advantages of simple structure and low cost.

[0142] Compared with the method of widening the antenna beamwidth by adopting a multi-stage resonant ring antenna, the present invention does not need to change the original antenna radiation structure, thus avoiding the problem of complex structure.

[0143] Compared with the method of extending the ground plane to broaden the beamwidth of the horizontally polarized antenna, the present disclosure does not need to increase the size of the ground plane and has the advantages of being small and compact.

[0144] Compared to increasing vertical polarization gain by shortening the height of reflective structure 20, the present disclosure does not require modifying the dimensions of the existing reflective structure 20, and impedance matching is much easier. The proposed novel omnidirectional indoor antenna loaded with parasitic patch 50 has the advantages of simple structure, compact size, and easier impedance matching.

[0145] It is understood that the above embodiments are merely exemplary embodiments for illustrating the principles of the present disclosure, and the present disclosure is not limited thereto. Those skilled in the art may make various modifications and improvements without departing from the spirit and substance of the present disclosure, and such modifications and improvements are also considered to be within the scope of protection of the present disclosure.

Claims

1. An omnidirectional indoor antenna, wherein: include: A vertically polarized antenna, comprising a tapered single-arm oscillator and a tapered reflective structure, wherein a small-diameter end of the single-arm oscillator and a small-diameter end of the reflective structure are arranged relative to each other; A horizontally polarized antenna, comprising a plurality of radiating units and a plurality of isolation structures arranged on the reflective structure, at least a portion of the radiating units and at least a portion of the isolation structures being located on a side of the reflective structure facing the single-arm oscillator, the plurality of isolation structures being arranged at circumferential intervals along the reflective structure, and the radiating unit being located between two adjacent isolation structures.

2. The omnidirectional indoor antenna according to claim 1, wherein: The length of the isolation structure in the first direction is greater than or equal to the length of the radiation unit in the first direction, wherein the first direction is: the direction from the large diameter end of the reflection structure to the small diameter end of the reflection structure on the surface of the reflection structure facing the single-arm oscillator.

3. The omnidirectional indoor antenna according to claim 2, wherein: The minimum distance between the isolation structure and the small-diameter end of the reflective structure is less than or equal to the minimum distance between the radiation unit and the small-diameter end of the reflective structure; and / or The minimum distance between the isolation structure and the large-diameter end of the reflective structure is less than or equal to the minimum distance between the radiation unit and the large-diameter end of the reflective structure.

4. The omnidirectional indoor antenna according to claim 1, wherein: The minimum distance between the surface of the isolation structure facing away from the reflective structure and the reflective structure is less than or equal to the minimum distance between the surface of the radiation unit facing away from the reflective structure and the reflective structure.

5. The omnidirectional indoor antenna according to claim 1, wherein: There is an isolation structure between two adjacent radiation units, and the minimum distances from the isolation structure to the two adjacent radiation units are the same.

6. The omnidirectional indoor antenna according to any one of claims 1 to 5, wherein: Each of the isolation structures includes a first isolation retaining wall and a second isolation retaining wall. The first isolation retaining wall and the second isolation retaining wall are arranged on the surface of the reflecting structure facing the single-arm oscillator, and the extension direction of the positive projection of the first isolation retaining wall on the reflecting structure intersects with the extension direction of the positive projection of the second isolation retaining wall on the reflecting structure.

7. The omnidirectional indoor antenna according to claim 6, wherein: The distance between the first isolation retaining wall and the second isolation retaining wall gradually increases in a direction away from the small-diameter end of the reflective structure.

8. The omnidirectional indoor antenna according to claim 7, wherein: One end of the first isolation retaining wall close to the small-diameter end of the reflective structure is connected to one end of the second isolation retaining wall close to the small-diameter end of the reflective structure.

9. The omnidirectional indoor antenna according to claim 6, wherein: Each of the isolation structures also includes a third isolation retaining wall, which is arranged on the surface of the reflecting structure facing the single-arm oscillator. The third isolation retaining wall is located on the side of the first isolation retaining wall and the second isolation retaining wall close to the small-path end of the reflecting structure. The first isolation retaining wall and the second isolation retaining wall are symmetrically distributed on both sides of the extension line of the third isolation retaining wall.

10. The omnidirectional indoor antenna according to claim 9, wherein: The third isolation retaining wall is spaced apart from the first isolation retaining wall and the second isolation retaining wall; or The first isolation retaining wall, the second isolation retaining wall and the third isolation retaining wall are an integrated structure.

11. The omnidirectional indoor antenna according to any one of claims 1 to 5, wherein: The isolation structure and the reflective structure are an integrated structure; or The isolation structure is detachably connected to the reflective structure.

12. The omnidirectional indoor antenna according to any one of claims 1 to 5, wherein: The isolation structure is detachably connected to the reflective structure. The omnidirectional room antenna further includes a plurality of first insulating gaskets, which are arranged between at least a portion of the isolation structure and the reflective structure.

13. The omnidirectional indoor antenna according to claim 9, wherein: The isolation structure is detachably connected to the reflective structure, and each of the isolation structures further comprises: a first connecting plate, the first connecting plate being detachably connected to the reflective structure, and the first isolation retaining wall being connected to the first connecting plate at an angle; a second connecting plate, the second connecting plate being detachably connected to the reflective structure, the second isolation retaining wall being connected to the second connecting plate at an angle, and the first connecting plate and the second connecting plate being located between the first isolation retaining wall and the second isolation retaining wall; A third connecting plate is detachably connected to the reflective structure, and the third isolation retaining wall is connected to the third connecting plate at an angle.

14. The omnidirectional indoor antenna according to any one of claims 1 to 5, wherein: The isolation structure, the single-arm oscillator and the reflection structure are made of the same material.

15. The omnidirectional indoor antenna according to any one of claims 1 to 5, wherein: The radiation unit includes a radiation patch and a guide patch. The radiation patch is connected to the reflective structure. The guide patch is opposite to the radiation patch and spaced apart. The guide patch is located on a side of the radiation patch away from the reflective structure.

16. The omnidirectional indoor antenna according to any one of claims 1 to 5, wherein: The omnidirectional indoor antenna further includes a parasitic patch, which is located on a side of the radiation unit that is away from the small-path end of the reflective structure, and faces the radiation unit.

17. The omnidirectional indoor antenna according to claim 16, wherein: The minimum distance from the parasitic patch to the large-diameter end of the reflective structure is less than or equal to the minimum distance from the isolation structure to the large-diameter end of the reflective structure.

18. The omnidirectional indoor antenna according to claim 16, wherein: The minimum distance from the parasitic patch to the large-diameter end of the reflective structure is less than or equal to the minimum distance from the parasitic patch to the radiation unit.

19. The omnidirectional indoor antenna according to claim 16, wherein: The minimum distance between the surface of the parasitic patch facing away from the reflective structure and the reflective structure is greater than or equal to the minimum distance between the surface of the radiation unit facing away from the reflective structure and the reflective structure.

20. The omnidirectional indoor antenna according to claim 16, wherein: The parasitic patch, the single-arm oscillator and the reflective structure are made of the same material.

21. The omnidirectional indoor antenna according to claim 16, wherein: The parasitic patch and the reflective structure are an integrated structure; or The parasitic patch is detachably connected to the reflective structure.

22. The omnidirectional indoor antenna according to claim 21, wherein: When the parasitic patch is detachably connected to the reflective structure, the omnidirectional room antenna further includes a plurality of second insulating gaskets, which are arranged between at least a portion of the parasitic patch and the reflective structure.

23. The omnidirectional indoor antenna according to any one of claims 1 to 5, wherein: The parasitic patch includes a first patch blocking wall, a second patch blocking wall and a third patch blocking wall connected to the reflective structure, the first patch blocking wall faces the radiation unit, the second patch blocking wall and the third patch blocking wall are respectively connected to the opposite sides of the first patch blocking wall, and the second patch blocking wall and the third patch blocking wall are located on the side of the first patch blocking wall away from the radiation unit.

24. The omnidirectional indoor antenna according to any one of claims 1 to 5, wherein: The surface of the reflecting structure facing the single-arm oscillator includes a plurality of mounting inclined surfaces, and the plurality of mounting inclined surfaces are connected in sequence around the central axis of the reflecting structure. Each of the radiation units is correspondingly installed on each of the mounting inclined surfaces, and at least a portion of each of the isolation structures is located at the intersection of two adjacent mounting inclined surfaces.

25. The omnidirectional indoor antenna according to claim 24, wherein: The surface of the reflective structure facing the single-arm oscillator includes multiple connecting slopes, the mounting slope includes a first sub-slope and a second sub-slope, the first sub-slopes of two adjacent mounting slopes are connected, the connecting slope is located between the second sub-slopes of two adjacent mounting slopes and is connected to the second sub-slope, and at least a portion of the isolation structure is located on the connecting slope.

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