Omnidirectional indoor distributed antenna
By setting up isolation structures and radiating units in the omnidirectional indoor antenna and optimizing their length and position, the problems of insufficient isolation and gain between the feeding ports are solved, and the signal quality and beam width are improved.
Patent Information
- Application Number
- PCT/CN2024/078290
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-02-23
- Publication Date
- 2025-10-23
AI Technical Summary
In existing dual-polarization multi-band omnidirectional indoor antennas, the isolation and gain between the feeding ports are insufficient, resulting in a decrease in signal quality.
An omnidirectional indoor antenna was designed, which adopted a conical single-arm dipole and a conical reflector structure. Multiple isolation structures and radiating units were set on the reflector structure. By optimizing the length and position of the isolation structure, the current coupling between the radiating units was reduced and the isolation of the feed port was improved.
The isolation between the feed ports and the gain of the horizontally polarized antenna are improved, while the beam width is widened and the radiation pattern of the antenna is improved.
Smart Images
Figure CN2024078290_23102025_PF_FP_ABST
Abstract
Description
Omnidirectional room distribution antenna TECHNICAL FIELD
[0001] The present disclosure relates to the field of communication technology, in particular to an omnidirectional room distribution antenna. BACKGROUND
[0002] With the rapid development of urban construction, the residential density is increasing. Due to the shielding of the newly added buildings to the original macro station coverage area, new signal blind areas or weak signal conditions will appear, which directly affects the quality of wireless signals, so the omnidirectional room distribution antenna emerges as the times require. At the same time, the omnidirectional room distribution antenna develops in the direction of multi-band and dual-polarization. In the dual-polarization multi-band omnidirectional room distribution antenna, coupling is easy to occur between the feed ports. Therefore, how to make the dual-port fed dual-polarization multi-band omnidirectional room distribution antenna still have good port isolation and higher gain has become a research hotspot today.
[0003] SUMMARY
[0004] The present disclosure aims to at least solve one of the technical problems existing in the prior art, and proposes an omnidirectional room distribution antenna.
[0005] In order to achieve the above-mentioned purpose, the present disclosure provides an omnidirectional room distribution antenna, a vertical polarization antenna, the vertical polarization antenna comprising a conical single-arm oscillator and a conical reflection structure, the small-diameter end of the single-arm oscillator and the small-diameter end of the reflection structure being oppositely arranged.
[0006] A horizontal polarization antenna, the horizontal polarization antenna comprising a plurality of radiation units arranged on the reflection structure and a plurality of isolation structures, at least part of the radiation units and at least part of the isolation structures being located on the side of the reflection structure facing the single-arm oscillator, a plurality of the isolation structures being arranged along the circumference of the reflection structure, and the radiation units being located between adjacent two isolation structures.
[0007] 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.
[0008] Wherein, the minimum distance between the isolation structure and the small-diameter end of the reflection structure is less than or equal to the minimum distance between the radiation unit and the small-diameter end of the reflection structure; and / or
[0009] The minimum distance between the isolation structure and the large-diameter end of the reflection structure is less than or equal to the minimum distance between the radiation unit and the large-diameter end of the reflection structure.
[0010] The minimum distance from the surface of the reflection structure away from the radiation unit to the reflection structure is less than or equal to the minimum distance from the surface of the reflection structure away from the radiation unit to the reflection structure.
[0011] The isolation structure between the two adjacent radiation units has the same minimum distance to the two adjacent radiation units.
[0012] Each isolation structure includes a first isolation barrier and a second isolation barrier, the first isolation barrier and the second isolation barrier are arranged on the surface of the reflection structure facing the single-arm oscillator, and the extension direction of the orthographic projection of the first isolation barrier on the reflection structure intersects with the extension direction of the orthographic projection of the second isolation barrier on the reflection structure.
[0013] The distance between the first isolation barrier and the second isolation barrier gradually increases in the direction away from the small-diameter end of the reflection structure.
[0014] One end of the first isolation barrier close to the small-diameter end of the reflection structure is connected to one end of the second isolation barrier close to the small-diameter end of the reflection structure.
[0015] Each isolation structure further includes a third isolation barrier, the third isolation barrier is arranged on the surface of the reflection structure facing the single-arm oscillator, the third isolation barrier is located on one side of the first isolation barrier and the second isolation barrier close to the small-diameter end of the reflection structure, and the first isolation barrier and the second isolation barrier are symmetrically distributed on both sides of the extension line of the third isolation barrier.
[0016] The third isolation barrier is spaced apart from the first isolation barrier and the second isolation barrier; or
[0017] The first isolation barrier, the second isolation barrier, and the third isolation barrier are an integral structure.
[0018] When the third isolation barrier is spaced apart from the first isolation barrier and the second isolation barrier, the spacing between the third isolation barrier and the first isolation barrier is less than 3mm, and the spacing between the third isolation barrier and the second isolation barrier is less than 3mm.
[0019] The isolation structure and the reflection structure are an integral structure; or
[0020] The isolation structure and the reflection structure are detachably connected.
[0021] The isolation structure is detachably connected with the reflecting structure, and each of the isolation structures further comprises:
[0022] The isolation structure is detachably connected with the reflecting structure, and each of the isolation structures further comprises:
[0023] The first connecting plate is detachably connected with the reflecting structure, and the first isolation barrier is angularly connected with the first connecting plate;
[0024] The second connecting plate is detachably connected with the reflecting structure, and the second isolation barrier is angularly connected with the second connecting plate, and the first connecting plate and the second connecting plate are located between the first isolation barrier and the second isolation barrier;
[0025] The third connecting plate is detachably connected with the reflecting structure, and the third isolation barrier is angularly connected with the third connecting plate.
[0026] The materials of the isolation structure, the single-arm vibrator and the reflecting structure are the same.
[0027] The radiation unit comprises a radiation patch and a directing patch, the radiation patch is connected with the reflecting structure, the directing patch is oppositely and spacedly arranged with the radiation patch, and the directing patch is located on a side of the radiation patch away from the reflecting structure.
[0028] The omnidirectional chamber antenna further comprises a parasitic patch, the parasitic patch is located on a side of the radiation unit away from a small-diameter end of the reflecting structure, and the parasitic patch faces the radiation unit.
[0029] The minimum distance from the parasitic patch to the large-diameter end of the reflecting structure is less than or equal to the minimum distance from the isolation structure to the large-diameter end of the reflecting structure.
[0030] The minimum distance from the parasitic patch to the large-diameter end of the reflecting structure is less than or equal to the minimum distance from the parasitic patch to the radiation unit.
[0031] The minimum distance from the surface of the parasitic patch away from the reflecting structure to the reflecting structure is greater than or equal to the minimum distance from the surface of the radiation unit away from the reflecting structure to the reflecting structure.
[0032] The materials of the parasitic patch, the single-arm vibrator and the reflecting structure are the same.
[0033] The parasitic patch and the reflecting structure are an integral structure; or
[0034] The parasitic patch is detachably connected with the reflecting structure.
[0035] The omnidirectional chamber split antenna further comprises a plurality of second insulating spacers, which are arranged between at least part of the parasitic patch and the reflecting structure when the parasitic patch is detachably connected with the reflecting structure.
[0036] The parasitic patch comprises a first patch barrier wall connected with the reflecting structure, a second patch barrier wall and a third patch barrier wall, the first patch barrier wall faces the radiating unit, the second patch barrier wall and the third patch barrier wall are connected on the two sides opposite to the first patch barrier wall respectively, and the second patch barrier wall and the third patch barrier wall are located on the side of the first patch barrier wall away from the radiating unit.
[0037] The surface of the reflecting structure facing the single-arm oscillator comprises a plurality of patching slopes, the plurality of patching slopes are sequentially connected around the central axis of the reflecting structure, each radiating unit is installed on each patching slope, and at least part of each isolation structure is located at the joint of adjacent two patching slopes.
[0038] The surface of the reflecting structure facing the single-arm oscillator comprises a plurality of connecting slopes, the patching slope comprises a first sub-slope and a second sub-slope, the first sub-slopes of adjacent two patching slopes are connected, the connecting slope is located between and connected with the second sub-slopes of adjacent two patching slopes, and at least part of the isolation structure is located on the connecting slope. BRIEF DESCRIPTION OF DRAWINGS
[0039] The accompanying drawings are included to provide a further understanding of the present disclosure and constitute a part of the specification, and are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation on the present disclosure. In the drawings:
[0040] Fig. 1 shows a structural schematic diagram of an omnidirectional chamber split antenna according to an optional embodiment of the present disclosure;
[0041] Fig. 2 shows a radiation pattern of a horizontal polarization antenna of the omnidirectional chamber split antenna in Fig. 1;
[0042] Fig. 3 shows a comparison diagram of port isolation of the omnidirectional chamber split antenna in Fig. 1 and port isolation of an omnidirectional chamber split antenna without isolation structure;
[0043] Fig. 4 shows a structural schematic diagram of an omnidirectional chamber split antenna according to another optional embodiment of the present disclosure;
[0044] Fig. 5 shows a structural schematic diagram of an omnidirectional chamber split antenna according to another optional embodiment of the present disclosure;
[0045] FIG. 6 shows a structure diagram of an omni-directional room-split antenna according to another alternative embodiment of the present disclosure;
[0046] FIG. 7 shows a structure diagram of an omni-directional room-split antenna according to another alternative embodiment of the present disclosure;
[0047] FIG. 8 shows a structure diagram of an omni-directional room-split antenna according to another alternative embodiment of the present disclosure;
[0048] FIG. 9 shows a structure diagram of an omni-directional room-split antenna according to another alternative embodiment of the present disclosure;
[0049] FIG. 10 shows a radiation pattern of a horizontal polarization antenna of the omni-directional room-split antenna in FIG. 9;
[0050] FIG. 11 shows a radiation pattern of a vertical polarization antenna of the omni-directional room-split antenna in FIG. 9;
[0051] FIG. 12 shows a structure diagram of an omni-directional room-split antenna according to another alternative embodiment of the present disclosure;
[0052] FIG. 13 shows a radiation pattern of a horizontal polarization antenna of the omni-directional room-split antenna in FIG. 12;
[0053] FIG. 14 shows a radiation pattern of a vertical polarization antenna of the omni-directional room-split antenna in FIG. 12;
[0054] FIG. 15 shows a structure diagram of an omni-directional room-split antenna according to another alternative embodiment of the present disclosure;
[0055] FIG. 16 shows a radiation pattern of a horizontal polarization antenna of the omni-directional room-split antenna in FIG. 15;
[0056] FIG. 17 shows a radiation pattern of a vertical polarization antenna of the omni-directional room-split antenna in FIG. 15;
[0057] FIG. 18 shows a structure diagram of an omni-directional room-split antenna according to another alternative embodiment of the present disclosure;
[0058] FIG. 19 shows a structure diagram of an omni-directional room-split antenna according to another alternative embodiment of the present disclosure;
[0059] FIG. 20 shows a structure diagram of an omni-directional room-split antenna according to another alternative embodiment of the present disclosure;
[0060] FIG. 21 shows a radiation pattern of a horizontal polarization antenna of an omni-directional room-split antenna according to an example;
[0061] FIG. 22 shows a radiation pattern of a horizontal polarization antenna of an omni-directional room-split antenna according to another example;
[0062] FIG. 23 shows a radiation pattern of a vertical polarization antenna of another example omni-directional indoor antenna.
[0063] 10, monopole; 20, reflecting 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, directing patch; 40, isolation structure; 41, first end; 42, second end; 43, first isolation barrier; 44, second isolation barrier; 45, third isolation barrier; 46, first connecting plate; 47, second connecting plate; 48, third connecting plate; 50, parasitic patch; 51, first patch barrier; 52, second patch barrier; 53, third patch barrier. DETAILED DESCRIPTION
[0064] The specific embodiments of the present disclosure will be described below in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely intended to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.
[0065] To make the objects, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be described clearly and completely below with reference to the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments of the present disclosure. Based on the described embodiments of the present disclosure, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to 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 be understood as the common meanings thereof by those skilled in the art to which the present disclosure belongs. The terms “first”, “second” and similar terms used in the present disclosure do not denote any order, quantity or importance, but are used to distinguish different components. Similarly, the terms “include” or “contain” and similar terms mean that the elements or objects before the terms encompass the elements or objects listed after the terms and their equivalents, without excluding other elements or objects. The terms “connect” or “connected” and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms “up”, “down”, “left”, “right” and the like are only used to indicate relative positional relationships, and when the absolute positions of the described objects are changed, the relative positional relationships can also be changed accordingly.
[0067] As used herein, "parallel," "perpendicular" include the recited condition and conditions that are approximately the recited condition, the approximation being within an acceptable range of deviation, as determined by one of ordinary skill in the art taking into account the measurements at issue and the error associated with the particular measurement (i.e., limitations of the measurement system). For example, "parallel" includes absolute parallel and approximately parallel, where the acceptable range of deviation for approximately parallel can be, for example, within 5°; "perpendicular" includes absolute perpendicular and approximately perpendicular, where the acceptable range of deviation for approximately perpendicular can also be, for example, 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 can also be present.
[0069] Exemplary embodiments are described herein with reference to cross-sectional and / or plan view illustrations that are idealized examples. In the interest of clarity, not all of the individual parts of the devices are shown in the figures. It will be appreciated that in the development of any such actual implementation, numerous implementation-specific decisions can be made. These implementation-specific decisions can include, for example, choosing a species, or particular arrangements of materials, and / or relative geometric configurations. These implementation-specific decisions can result in variations in the exemplary embodiments, and it is intended that the exemplary embodiments encompass all such variations.
[0070] FIG. 1 is a schematic diagram of the structure of an omni-directional room antenna according to an exemplary embodiment of the present disclosure. As shown in FIG. 1, the omni-directional room antenna includes a vertical polarization antenna and a horizontal polarization antenna.
[0071] The vertical polarization antenna includes a tapered monopole 10 and a tapered reflecting structure 20, with the small-diameter ends of the monopole 10 and the reflecting structure 20 facing each other. The tapered portions of the monopole 10 and the reflecting structure 20 face each other, and the monopole 10 and the reflecting structure 20 are coaxially arranged, forming a pair of asymmetric dipoles, which are fed by a feed coaxial line, to form vertical polarization radiation.
[0072] The horizontal polarization antenna comprises a plurality of radiation units 30 and a plurality of isolation structures 40 arranged on the reflecting structure 20, at least part of the radiation units 30 and at least part of the isolation structures 40 are located on the side of the reflecting structure 20 facing the monopole 10, the plurality of isolation structures 40 are arranged along the circumference of the reflecting structure 20, and the radiation units 30 are located between two adjacent isolation structures 40. The plurality of radiation units are arranged along the circumference of the reflecting structure 20 and are fed by the feed coaxial, forming horizontal polarization radiation. By arranging the isolation structure 40 between the adjacent two radiation units 30, the effect of reducing the current coupling between the radiation units 30 is achieved, thereby improving the antenna radiation pattern and improving the gain of the horizontal polarization antenna.
[0073] Since the reflecting structure 20 constituting the vertical polarization antenna is also the ground plane of the radiation unit 30 constituting the horizontal polarization antenna, the reflecting structure 20 is connected to the outer conductor of the feed coaxial of the vertical polarization antenna and the horizontal polarization antenna, thereby affecting the isolation between the feed port of the vertical polarization antenna and the feed port of the horizontal polarization antenna, and causing the current flowing through the reflecting structure 20 to be coupled between the feed port of the vertical polarization antenna and the feed port of the horizontal polarization antenna. By arranging a plurality of isolation structures 40 on the reflecting structure 20, the isolation between the feed ports can be improved, and the risk of current coupling of the feed ports can be reduced.
[0074] In some alternative embodiments, the circumferential side of each radiation unit 30 has a plurality of isolation structures 40 arranged thereon.
[0075] In some alternative embodiments, the length of the isolation structure 40 in the first direction is greater than or equal to the length of the radiation unit 30 in the first direction, wherein the first direction is the direction from the large diameter end of the reflecting structure 20 to the small diameter end of the reflecting structure 20 on the surface of the reflecting structure 20 facing the monopole 10. Such arrangement makes the isolation structure 40 have good isolation effect, further improves the isolation, and is beneficial to reduce the current coupling between the radiation units 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 radiation unit 30 in the first direction, the isolation effect will be poor, and the risk of current coupling between the radiation units 30 will be high. Of course, the length of the isolation structure 40 in the first direction should be slightly longer than the length of the radiation unit 30 in the first direction, but should not be too long, otherwise it will affect the synthesis of the horizontal polarization 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 radiation unit 30 in the first direction is less than 1.25.
[0077] In some optional embodiments, referring to FIG. 1, FIG. 4 to FIG. 9, the minimum distance between the first end 41 of the isolation structure 40 and the small-diameter end of the reflecting structure 20 is less than or equal to the minimum distance between the radiating unit 30 and the small-diameter end of the reflecting structure 20. Such an arrangement can reduce the current coupling generated by the radiating unit 30 near the side of the small-diameter end of the reflecting structure 20, so as to improve the antenna radiation pattern.
[0078] In some optional embodiments, referring to FIG. 1, FIG. 4 to FIG. 9, the minimum distance between the second end 42 of the isolation structure 40 and the large-diameter end of the reflecting structure 20 is less than or equal to the minimum distance between the radiating unit 30 and the large-diameter end of the reflecting structure 20. Such an arrangement can reduce the current coupling generated by the radiating unit 30 near the side of the large-diameter end of the reflecting structure 20, so as to improve the antenna radiation pattern.
[0079] In some optional embodiments, referring to FIG. 1, FIG. 4 to FIG. 9, the minimum distance between the surface of the isolation structure 40 away from the reflecting structure 20 and the reflecting structure 20 is less than or equal to the minimum distance between the surface of the radiating unit 30 away from the reflecting structure 20 and the reflecting structure 20. Such an arrangement is conducive to reducing the coupling between the radiating units 30 without affecting the antenna radiation direction.
[0080] In some optional embodiments, referring to FIG. 1, FIG. 4 to FIG. 9, there is an isolation structure 40 between two adjacent radiating units 30, and the minimum distance between the isolation structure 40 and the two adjacent radiating units 30 is the same. Such an arrangement allows the adjacent isolation structure 40 to be located in the middle of the two adjacent radiating units 30, so as to avoid affecting the synthesis of the radiation pattern.
[0081] In some optional embodiments, the isolation structure 40 is an axisymmetric structure, and the two adjacent radiating units 30 are symmetric with respect to 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 FIG. 1, FIG. 4 to FIG. 9, each isolation structure 40 includes a first isolation barrier 43 and a second isolation barrier 44, which are arranged on the surface of the reflecting structure 20 facing the monopole 10, and the extension direction of the orthographic projection of the first isolation barrier 43 on the reflecting structure 20 intersects the extension direction of the orthographic projection of the second isolation barrier 44 on the reflecting structure 20. Such an arrangement allows the first isolation barrier 43 and the second isolation barrier 44 of the same isolation structure 40 to isolate different radiating units 30, effectively improving the isolation of the horizontally polarized antenna and further reducing the risk of current coupling between the radiating units 30.
[0084] In some optional embodiments, referring to FIG. 1, FIG. 4 to FIG. 9, the distance between the first isolation barrier 43 and the second isolation barrier 44 gradually increases in the direction away from the small-diameter end of the reflecting structure 20. Such arrangement makes the first isolation barrier 43 and the second isolation barrier 44 approach the radiating units 30 on both sides, respectively, to reduce the current coupling between two adjacent radiating units 30.
[0085] In some optional embodiments, referring to FIG. 1, FIG. 4 to FIG. 9, one end of the first isolation barrier 43 close to the small-diameter end of the reflecting structure 20 is connected with one end of the second isolation barrier 44 close to the small-diameter end of the reflecting structure 20. Such arrangement can reduce the coupling of the current at the gap between the first isolation barrier 43 and the second isolation barrier 44, and improve the isolation degree of the isolation structure 40 to the current. In addition, such arrangement is conducive to the synchronous installation of the first isolation barrier 43 and the second isolation barrier 44 to the reflecting structure 20.
[0086] In some optional embodiments, the first isolation barrier 43 and the second isolation barrier 44 are an integral structure.
[0087] In some optional embodiments, the first isolation barrier 43 and the second isolation barrier 44 are a split structure and can be detachably connected, for example, the first isolation barrier 43 and the second isolation barrier 44 are connected by bolts; for another example, the first isolation barrier 43 and the second isolation barrier 44 are clamped.
[0088] In the specific embodiments shown in FIG. 1, FIG. 3 to FIG. 8, the minimum distance from the first isolation barrier 43 to the large-diameter end of the reflecting structure 20 is less than or equal to the minimum distance from the radiating unit 30 to the small-diameter end of the reflecting structure 20; the minimum distance from the second isolation barrier 44 to the large-diameter end of the reflecting structure 20 is less than or equal to the minimum distance from the radiating unit 30 to the small-diameter end of the reflecting structure 20.
[0089] In some optional embodiments, referring to FIG. 1, FIG. 4 to FIG. 9, each isolation structure 40 further includes a third isolation barrier 45, which is arranged on the surface of the reflecting structure 20 facing the single-arm oscillator 10, the third isolation barrier 45 is located on one side of the first isolation barrier 43 and the second isolation barrier 44 close to the small-diameter end of the reflecting structure 20, and the first isolation barrier 43 and the second isolation barrier 44 are symmetrically distributed on both sides of the extension line of the third isolation barrier 45. The third isolation barrier 45 can further isolate two adjacent radiating units 30 to further reduce the coupling of the current between the two adjacent radiating units 30. At the same time, the two adjacent radiating units 30 are symmetrically distributed on both sides of the extension line of the third isolation barrier 43 to avoid affecting the synthesis of the radiation pattern.
[0090] In some optional embodiments, the first isolation barrier 43, the second isolation barrier 44 and the third isolation barrier 45 are in an integrated structure. Such arrangement 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 synthesis of the radiation pattern will not be affected, and the effect of reducing current coupling can also be achieved.
[0092] In some optional embodiments, the isolation structure 40 and the reflection structure 20 are in an integrated structure. For example, the isolation structure 40 and the reflection structure 20 can be integrally injection molded in an open mold manner.
[0093] In some other optional embodiments, the isolation structure 40 can be suspended and fixed above the reflection structure 20.
[0094] In some other optional embodiments, the isolation structure 40 and the reflection structure 20 are detachably connected. The isolation structure 40 and the reflection structure 20 can be fixed by screwing, buckling or other fixing methods.
[0095] In some optional embodiments, the isolation structure 40 and the reflection structure 20 are detachably connected, and the omnidirectional chamber antenna further comprises a plurality of first insulating pads (not shown) arranged between at least part of the isolation structure 40 and the reflection structure 20. By arranging the first insulating pads between the isolation structure 40 and the reflection structure 20, the influence on the antenna intermodulation performance can be reduced.
[0096] In some alternative embodiments, the isolation structure 40 is detachably connected with the reflecting structure 20, each isolation structure 40 further comprises a first connecting plate 46, a second connecting plate 47 and a third connecting plate 48, the first connecting plate 46 is detachably connected with the reflecting structure 20, the first isolation barrier 43 is angularly connected with the first connecting plate 46; the second connecting plate 47 is detachably connected with the reflecting structure 20, the second isolation barrier 44 is angularly connected with the second connecting plate 47, the first connecting plate 46 and the second connecting plate 47 are located between the first isolation barrier 43 and the second isolation barrier 44; the third connecting plate 48 is detachably connected with the reflecting structure 20, the third isolation barrier 45 is angularly connected with the third connecting plate 48. The first isolation barrier 43 is connected on the reflecting structure 20 through the first connecting plate 46, the second isolation barrier 44 is connected on the reflecting structure 20 through the second connecting plate 47, the third isolation barrier 45 is connected on the reflecting 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 with the reflecting structure 20 in the form of clamping, gluing and threaded connection.
[0097] In some alternative embodiments, the isolation structure 40, the single-arm vibrator 10 and the reflecting structure 20 are made of the same material. The isolation structure 40 can be made of the same metal material as the single-arm vibrator 10 and the reflecting structure 20, such as aluminum, copper and the like.
[0098] In some alternative embodiments, referring to FIG. 1, FIG. 4 to FIG. 9, the radiation unit 30 comprises a radiation patch 31 and a directivity patch 32, the radiation patch 31 is connected with the reflecting structure 20, the directivity patch 32 is oppositely and spacedly arranged with the radiation patch 31, and the directivity patch 32 is located on the side of the radiation patch 31 away from the reflecting structure 20. A plurality of radiation patches 31 are placed on the reflecting structure 20 in a circular array at equal intervals, taking air as the medium, and are fed by a coaxial cable. Each directivity patch 32 is oppositely arranged with each radiation patch 31 and is located above the radiation patch 31 to form horizontal polarization radiation together with the radiation patch 31.
[0099] FIG. 3 shows a comparison diagram of the isolation degree of the omnidirectional chamber antenna with and without the isolation structure. In FIG. 3, the curve located on the upper side is the curve of the port isolation degree of the omnidirectional chamber antenna without the isolation structure 40, and the curve located on the lower side is the curve of the port isolation degree of the omnidirectional chamber antenna with the isolation structure 40. As can be seen from FIG. 3, the isolation degree between the feed ports is improved by 3dB after the isolation structure 40 is arranged in the omnidirectional chamber antenna.
[0100] Figure 21 shows a radiation pattern of an omni-directional room-division antenna in one example, wherein the omni-directional room-division antenna in this example is an omni-directional room-division antenna without isolation structures. Figure 2 shows a radiation pattern of an omni-directional room-division antenna in one embodiment of the present disclosure. As can be seen from the comparison between Figure 2 and Figure 21, after the isolation structures are arranged on the reflecting structure 20, the gain of the omni-directional room-division antenna for horizontal polarization is improved, and the beam width at 2.5 GHz is also widened to a certain extent.
[0101] In the specific embodiment shown in Figure 1, the first isolation barrier 43 and the second isolation barrier 44 are of the same shape, and are substantially rectangular plates, and the first isolation barrier 43 and the second isolation barrier 44 have notches on the side facing away from the reflecting structure 20.
[0102] In the specific embodiment shown in Figure 4, the first isolation barrier 43 and the second isolation barrier 44 are of the same shape, and are rectangular plates.
[0103] In the specific embodiment shown in Figure 5, the first isolation barrier 43 and the second isolation barrier 44 are of the same shape, and are bevel-branch plates. It should be noted that the bevel-branch plate is a rectangular structure having an included angle between a short side and a long side, and the included angle is not equal to 90°.
[0104] In the specific embodiment shown in Figure 6, the first isolation barrier 43 and the second isolation barrier 44 are of the same shape, and are hexagonal plates. It should be noted that the hexagonal plate is a non-equilateral hexagon, and the bottom side is in contact with the reflecting structure 20, and the length of the bottom side is greater than or equal to the length of the top side. Of course, in other embodiments, the hexagonal plate can be an equilateral hexagon.
[0105] In the specific embodiment shown in Figure 7, the first isolation barrier 43 and the second isolation barrier 44 are of the same shape, and are trapezoidal plates, and the short bottom side of the trapezoidal plate is in contact with the reflecting structure 20.
[0106] In the specific embodiment shown in Figure 8, the first isolation barrier 43 and the second isolation barrier 44 are of the same shape, and are semicircular plates, and the straight side of the semicircular plate is in contact with the reflecting structure 20.
[0107] It should be noted that the shape of the third isolation barrier 45 can be the same as or different from the shape of the first isolation barrier 43 and the second isolation barrier 44, which is not specifically limited here.
[0108] In some optional embodiments, referring to FIG. 9, FIG. 12, FIG. 15, FIG. 18 to FIG. 20, the omni-directional chamber antenna further comprises a parasitic patch 50, which is located on the side of the radiation unit 30 away from the small-diameter end of the reflecting structure 20, and faces the radiation unit 30. In this embodiment, the parasitic patch 50 is arranged on the reflecting structure 20. When the omni-directional chamber antenna is excited, the current excited by the reflecting structure 20 is induced on the parasitic patch 50, so that the current path is lengthened, the current distribution is made uniform, the current weak area is covered, and the synthesis of the horizontal polarization radiation pattern is affected, thereby widening the horizontal polarization antenna beamwidth. At the same time, the parasitic patch 50 also radiates as a branch of the reflecting structure 40, so that the gain of the vertical polarization antenna is improved.
[0109] It should be noted that the parasitic patch 50 facing the radiation unit 30 means that the parasitic patch 50 is vertically arranged on the reflecting structure 20, and the largest surface of the parasitic patch 50 faces the radiation unit 30, and the parasitic patch 50 and the isolation structure 40 surround three sides of the radiation unit 30. The parasitic patch 50 can be connected with the reflecting structure 20, or can be suspended and fixed above the reflecting structure 20.
[0110] Of course, the parasitic patch 50 can also be arranged on the radome, which is not specifically limited here.
[0111] In some optional embodiments, referring to FIG. 9, FIG. 12, FIG. 15, FIG. 18 to FIG. 20, the minimum distance from the parasitic patch 50 to the large-diameter end of the reflecting structure 20 is less than or equal to the minimum distance from the isolation structure 40 to the large-diameter end of the reflecting structure 20.
[0112] In some optional embodiments, referring to FIG. 9, FIG. 12, FIG. 15, FIG. 18 to FIG. 20, the minimum distance from the parasitic patch 50 to the large-diameter end of the reflecting 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 position of the radiating unit 30 and the reflecting structure 20. Since the current of the radiating unit 30 is mainly distributed at the edge of the radiating unit 30, and the current at the center of the radiating unit 30 is weak, the parasitic patch 50 should not be too far away from the edge of the radiating patch 31, otherwise the influence on the synthesis of the horizontal polarization antenna pattern is small. At the same time, the parasitic patch 50 cannot be too close to the radiating patch 31, otherwise it will cause distortion of the horizontal polarization antenna pattern due to strong coupling. The specific position and size of the parasitic patch 50 can be reasonably set according to the position and size of the radiating patch 31 and the current distribution. For example, the length of the parasitic patch 50 should not be too short, otherwise it cannot affect the horizontal polarization antenna pattern; at the same time, the length of the parasitic patch 50 should not be too long, otherwise it cannot shield the radiation of the horizontal polarization antenna in the far field region.
[0114] The number of parasitic patches 50 can be increased or decreased as needed to adjust the performance of the antenna. The shape of the parasitic patch 50 should be an axisymmetric figure.
[0115] In some optional embodiments, referring to FIGS. 9, 12, 15, 18-20, the minimum distance from the surface of the parasitic patch 50 away from the reflecting structure 20 to the reflecting structure 20 is greater than the minimum distance from the surface of the radiating unit 30 away from the reflecting structure 20 to the reflecting structure 20. Such arrangement can better uniform the current and reduce the occurrence of weak current area.
[0116] It should be noted that the minimum distance from the surface of the parasitic patch 50 away from the reflecting structure 20 to the reflecting structure 20 should not be too large to avoid interference with the radome.
[0117] In some optional embodiments, the materials of the parasitic patch 50, the monopole 10 and the reflecting structure 20 are the same. The parasitic patch 50 can adopt the same metal material as the monopole 10 and the reflecting structure 20, such as aluminum, copper and the like.
[0118] In some optional embodiments, the parasitic patch 50 and the reflecting structure 20 are an integral structure. For example, the isolation structure 40 and the parasitic patch 50 can be integrally injection molded in a mold opening manner.
[0119] In other optional embodiments, the isolation structure 40, the parasitic patch 50 and the reflecting structure 20 are an integral structure.
[0120] In other optional embodiments, the parasitic patch 50 and the reflecting structure 20 are detachably connected. The parasitic patch 50 and the reflecting structure 20 can be fixed by screwing, buckling and the like.
[0121] In some optional embodiments, the parasitic patch 50 is detachably connected with the reflecting structure 20, and the omnidirectional chamber antenna further comprises a plurality of second insulating pads arranged between at least part of the parasitic patch 50 and the reflecting structure 20. By arranging the second insulating pads between the parasitic patch 50 and the reflecting structure 20, the intermodulation of the antenna can be reduced.
[0122] In some optional embodiments, the surface of the reflecting structure 20 facing the monopole 10 comprises a plurality of attached slopes 21 connected in sequence around the central axis of the reflecting structure 20, each radiating element 30 is installed on each attached slope 21, and at least part of each isolation structure 40 is located at the joint of adjacent two attached slopes 21. By arranging the plurality of attached slopes 21, the plurality of attached slopes 21 are connected to form a conical surface, which facilitates the installation of the isolation structure 40 while ensuring the feeding between the reflecting structure 20 and the monopole 10.
[0123] In some optional embodiments, the connecting line of adjacent two attached slopes 21 is used as the installation line 22, and the projection of at least part of each isolation structure 40 covers the installation line 22.
[0124] In some optional embodiments, the surface of the reflecting structure 20 facing the monopole 10 comprises a plurality of connecting slopes 23, the attached slope 21 comprises a first sub-slope 211 and a second sub-slope 212, the first sub-slope 211 of adjacent two attached slopes 21 is connected, the connecting slope 23 is located between and connected with the second sub-slope 212 of adjacent two attached slopes 21, and at least part of the isolation structure 40 is located on the connecting slope 23. In this way, the installation position of the isolation structure 40 can be determined, and the influence of the isolation structure 40 on the synthesis of the horizontal polarization radiation pattern is avoided.
[0125] The shape of the parasitic patch 50 can be various, 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 structure, and the largest surface of the rectangular plate structure faces the radiating element 30.
[0127] Fig. 10 shows the radiation pattern of the horizontal polarization antenna of the omni-directional room-division antenna in Fig. 9; Fig. 22 shows the radiation pattern of the horizontal polarization antenna of an example of the omni-directional room-division antenna without the parasitic patch 50. As can be seen from Fig. 22, the horizontal polarization antenna of the omni-directional room-division antenna without the parasitic patch has a beam width of about 37.3° at 2.5 GHz, and as can be seen from Fig. 10, the horizontal polarization antenna of the omni-directional room-division antenna with the parasitic patch 50 has a beam width of about 47.6° at 2.5 GHz. As can be seen from the comparison between Fig. 10 and Fig. 22, the beam width of the horizontal polarization antenna is increased by 10° by providing the parasitic patch 50 on the reflecting structure 40.
[0128] Fig. 11 shows the radiation pattern of the vertical polarization antenna of the omni-directional room-division antenna in Fig. 9; Fig. 23 shows the radiation pattern of the vertical polarization antenna of an example of the omni-directional room-division antenna without the parasitic patch 50. As can be seen from Fig. 23, the vertical polarization antenna of the omni-directional room-division antenna without the parasitic patch has a gain of about 4.1 dB at 2.5 GHz, and as can be seen from Fig. 11, the vertical polarization antenna of the omni-directional room-division antenna with the parasitic patch 50 has a gain of about 4.5 dB at 2.5 GHz. As can be seen from the comparison between Fig. 11 and Fig. 23, the gain of the vertical polarization antenna is increased by 0.4 dB by providing the parasitic patch 50 on the reflecting structure 40.
[0129] In the specific embodiment shown in Fig. 12, the parasitic patch 50 is a structure in which the two short sides of a rectangular plate are recessed toward the center of the rectangular plate, that is, a plate-shaped structure in which the two short sides of a rectangular plate are recessed toward the center of the rectangular plate, and the largest one of the surfaces of the parasitic patch 50 faces the radiating element 30.
[0130] Fig. 13 shows the radiation pattern of the horizontal polarization antenna of the omni-directional room-division antenna in Fig. 12; Fig. 22 shows the radiation pattern of the horizontal polarization antenna of an example of the omni-directional room-division antenna without the parasitic patch 50. As can be seen from Fig. 22, the horizontal polarization antenna of the omni-directional room-division antenna without the parasitic patch has a beam width of about 37.3° at 2.5 GHz, and as can be seen from Fig. 13, the horizontal polarization antenna of the omni-directional room-division antenna with the parasitic patch 50 has a beam width of about 44.17° at 2.5 GHz. As can be seen from the comparison between Fig. 13 and Fig. 22, the beam width of the horizontal polarization antenna is increased by 7° by providing the parasitic patch 50 on the reflecting structure 40.
[0131] Figure 14 shows the radiation pattern of the vertical polarization antenna of the omni-directional room-division antenna in Figure 12; Figure 23 shows the radiation pattern of the vertical polarization antenna of an example omni-directional room-division antenna, which does not have the parasitic patch 50. As can be seen from Figure 23, the gain of the vertical polarization antenna of the omni-directional room-division antenna without the parasitic patch at 2.5 GHz is about 4.1 dB, and as can be seen from Figure 14, the gain of the vertical polarization antenna of the omni-directional room-division antenna with the parasitic patch 50 at 2.5 GHz is about 4.57 dB. As can be seen from the comparison between Figure 14 and Figure 23, the gain of the vertical polarization antenna is increased by 0.47 dB by providing the parasitic patch 50 on the reflecting structure 40.
[0132] In the specific embodiment shown in Figure 15, the parasitic patch 50 is a rectangular plate with a recessed top, and the top long side of the rectangular plate is recessed towards the center, with the largest surface of the parasitic patch 50 facing the radiating element 30.
[0133] Figure 16 shows the radiation pattern of the horizontal polarization antenna of the omni-directional room-division antenna in Figure 15; Figure 22 shows the radiation pattern of the horizontal polarization antenna of an example omni-directional room-division antenna, which does not have the parasitic patch 50. As can be seen from Figure 22, the beamwidth of the horizontal polarization antenna of the omni-directional room-division antenna without the parasitic patch at 2.5 GHz is about 37.3°, and as can be seen from Figure 16, the beamwidth of the horizontal polarization antenna of the omni-directional room-division antenna with the parasitic patch 50 at 2.5 GHz is about 41.7°. As can be seen from the comparison between Figure 16 and Figure 22, the beamwidth of the horizontal polarization antenna is increased by 4° by providing the parasitic patch 50 on the reflecting structure 40.
[0134] Figure 17 shows the radiation pattern of the vertical polarization antenna of the omni-directional room-division antenna in Figure 15; Figure 23 shows the radiation pattern of the vertical polarization antenna of an example omni-directional room-division antenna, which does not have the parasitic patch 50. As can be seen from Figure 23, the gain of the vertical polarization antenna of the omni-directional room-division antenna without the parasitic patch at 2.5 GHz is about 4.1 dB, and as can be seen from Figure 17, the gain of the vertical polarization antenna of the omni-directional room-division antenna with the parasitic patch 50 at 2.5 GHz is about 4.33 dB. As can be seen from the comparison between Figure 17 and Figure 23, the gain of the vertical polarization antenna is increased by 0.2 dB by providing the parasitic patch 50 on the reflecting structure 40.
[0135] In the specific embodiment shown in Figure 18, the parasitic patch 50 is a hexagonal plate. It should be noted that the hexagonal plate is a non-equilateral hexagonal plate, with the bottom side in contact with the reflecting structure 20, and the length of the bottom side being greater than or equal to the length of the top side. Of course, in other alternative embodiments, the hexagonal plate can be an equilateral hexagonal plate.
[0136] In the specific embodiment shown in FIG. 19, 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 reflecting structure 20.
[0137] In some optional embodiments, referring to FIG. 20, the parasitic patch 50 includes a first patch barrier wall 51 connected with the reflecting structure 20, a second patch barrier wall 52 and a third patch barrier wall 53, the first patch barrier wall 51 faces the radiation unit 30, the second patch barrier wall 52 and the third patch barrier wall 53 are respectively connected on the opposite sides of the first patch barrier wall 51, and the second patch barrier wall 52 and the third patch barrier wall 53 extend from the first patch barrier wall 51 in a direction away from the radiation unit 30.
[0138] The omni-directional indoor antenna in the present disclosure adopts the radiation patch 31 and the directive patch 32 arranged oppositely, adopts the double-layer patch to realize horizontal polarization radiation, and adopts the single-arm vibrator 10 and the reflecting structure 20 to realize vertical polarization radiation. By arranging the isolation structure 40 between the adjacent two radiation units 30, the current dissipation can be reduced, so as to reduce the coupling between the radiation units 30 and improve the antenna performance. Meanwhile, by loading the parasitic patch 50 around the radiation unit 30, the current path can be prolonged, and the antenna performance can be improved.
[0139] Compared with changing the spacing and arrangement mode of the radiation units 30 to reduce the coupling between the radiation units 30, the present disclosure can improve the antenna performance while maintaining the original antenna radiation pattern shape.
[0140] Compared with using the 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 with loading the medium substrate on the radiation patch 31 to increase the port isolation, the present disclosure uses air as the medium of the patch, which has higher radiation efficiency and lower cost. The omni-directional indoor antenna proposed in the present disclosure has the advantages of simple structure and low cost.
[0142] Compared with using the multi-stage resonant loop antenna to widen the antenna wave width, the present disclosure does not need to change the original antenna radiation structure, avoiding the problem of complex structure.
[0143] Compared with the method of widening the horizontal polarization antenna wave width by lengthening the ground plane, the present disclosure does not need to increase the size of the ground plane, and has the advantages of small volume and compact size.
[0144] Compared with the method of improving the vertical polarization gain by shortening the height of the reflecting structure 20, the present disclosure does not need to change the size of the original reflecting structure 20, and the impedance matching is easier. The new omni-directional indoor antenna loaded with the parasitic patch 50 proposed in the present disclosure has the advantages of simple structure, compact size and easier impedance matching.
[0145] It is to be understood that the above-mentioned embodiments are merely illustrative of the principles of the present disclosure and that numerous modifications and improvements can be effected thereto without departing from the spirit and scope of the disclosure.
Claims
1. An omni-directional room division antenna, wherein, The omnidirectional indoor antenna comprises: a vertical polarization antenna comprising a tapered monopole and a tapered reflecting structure, the small-diameter end of the monopole and the small-diameter end of the reflecting structure being oppositely arranged; a horizontal polarization antenna comprising a plurality of radiating units arranged on the reflecting structure and a plurality of isolation structures, at least part of the radiating units and at least part of the isolation structures being located on the side of the reflecting structure facing the monopole, and the plurality of isolation structures being spaced along the circumference of the reflecting structure, with the radiating units being located between two adjacent isolation structures.
2. The omni-directional room division antenna of claim 1, wherein, The length of the isolation structure in a first direction is greater than or equal to the length of the radiating unit in the first direction, wherein the first direction is a direction on the surface of the reflecting structure facing the monopole, from the large-diameter end of the reflecting structure to the small-diameter end of the reflecting structure.
3. The omnidirectional indoor antenna according to claim 2, wherein the minimum distance between the isolation structure and the small-diameter end of the reflecting structure is less than or equal to the minimum distance between the radiating unit and the small-diameter end of the reflecting structure; and / or the minimum distance between the isolation structure and the large-diameter end of the reflecting structure is less than or equal to the minimum distance between the radiating unit and the large-diameter end of the reflecting structure. The minimum distance from the surface of the reflecting structure to the isolation structure is less than or equal to the minimum distance from the surface of the reflecting structure to the radiating unit.
4. The omni-directional room division antenna of claim 1, wherein, There is one isolation structure between two adjacent radiating units, and the minimum distance from the isolation structure to the two adjacent radiating units is the same.
5. The omni-directional room division antenna of claim 1, wherein, Each isolation structure comprises a first isolation barrier and a second isolation barrier arranged on the surface of the reflecting structure facing the monopole, and the extension direction of the orthographic projection of the first isolation barrier on the reflecting structure intersects the extension direction of the orthographic projection of the second isolation barrier on the reflecting structure.
6. The omni-directional room-division antenna of any of claims 1 to 5, wherein, The distance between the first isolation barrier and the second isolation barrier gradually increases in a direction away from the small-diameter end of the reflecting structure.
7. The omni-directional room division antenna of claim 6, wherein, One end of the first isolation barrier close to the small-diameter end of the reflecting structure is connected to one end of the second isolation barrier close to the small-diameter end of the reflecting structure.
8. The omni-directional room division antenna of claim 7, wherein, Each isolation structure further comprises a third isolation barrier arranged on the surface of the reflecting structure facing the monopole, the third isolation barrier being located on the side of the first isolation barrier and the second isolation barrier close to the small-diameter end of the reflecting structure, and the first isolation barrier and the second isolation barrier are symmetrically distributed on both sides of the extension line of the third isolation barrier.
9. The omni-directional room division antenna of claim 6, wherein, 10. The omnidirectional indoor antenna according to claim 9, wherein the third isolation barrier is spaced apart from the first isolation barrier and the second isolation barrier; or the first isolation barrier, the second isolation barrier and the third isolation barrier are an integral structure.
11. The omnidirectional indoor antenna according to any one of claims 1 to 5, wherein The isolation structure and the reflection structure are an integral structure; or The isolation structure and the reflection structure are detachably connected.
12. The omni-directional room-in-a-antenna of any of claims 1 to 5, wherein, The isolation structure and the reflection structure are detachably connected, and the omni-directional chamber antenna further comprises a plurality of first insulating gaskets, which are arranged between at least part of the isolation structure and the reflection structure.
13. The omni-directional room division antenna of claim 9, wherein, The isolation structure and the reflection structure are detachably connected, and each of the isolation structures further comprises: A first connecting plate, which is detachably connected with the reflection structure, and the first isolation barrier is angularly connected with the first connecting plate; A second connecting plate, which is detachably connected with the reflection structure, and the second isolation barrier is angularly connected with the second connecting plate, and the first connecting plate and the second connecting plate are located between the first isolation barrier and the second isolation barrier; A third connecting plate, which is detachably connected with the reflection structure, and the third isolation barrier is angularly connected with the third connecting plate.
14. The omni-directional room-in-a-antenna of 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 omni-directional room-in-a-antenna of any of claims 1 to 5, wherein, The radiation unit comprises a radiation patch and a directing patch, the radiation patch is connected with the reflection structure, the directing patch is oppositely and spacedly arranged with the radiation patch, and the directing patch is located on the side of the radiation patch away from the reflection structure.
16. The omni-directional room-in-a-antenna of any one of claims 1 to 5, wherein, The omni-directional chamber antenna further comprises a parasitic patch, which is located on the side of the radiation unit away from the small-diameter end of the reflection structure, and the parasitic patch faces the radiation unit.
17. The omni-directional room division antenna of claim 16, wherein, The minimum distance from the parasitic patch to the large-diameter end of the reflection structure is less than or equal to the minimum distance from the isolation structure to the large-diameter end of the reflection structure.
18. The omni-directional room division antenna of claim 16, wherein, The minimum distance from the parasitic patch to the large-diameter end of the reflection structure is less than or equal to the minimum distance from the parasitic patch to the radiation unit.
19. The omni-directional room division antenna of claim 16, wherein, The minimum distance from the surface of the parasitic patch away from the reflection structure to the reflection structure is greater than or equal to the minimum distance from the surface of the radiation unit away from the reflection structure to the reflection structure.
20. The omni-directional room division antenna of claim 16, wherein, The parasitic patch, the single-arm oscillator and the reflection structure are made of the same material.
21. The omni-directional chamber antenna according to claim 16, wherein, The parasitic patch and the reflection structure are an integral structure; or The parasitic patch and the reflection structure are detachably connected.
22. The omni-directional room division antenna of claim 21, wherein, When the parasitic patch and the reflection structure are detachably connected, the omni-directional chamber antenna further comprises a plurality of second insulating gaskets, which are arranged between at least part of the parasitic patch and the reflection structure.
23. The omni-directional room-in-a-box antenna of any one of claims 1 to 5, wherein, The parasitic patch comprises a first patch barrier, a second patch barrier and a third patch barrier connected with the reflection structure, the first patch barrier faces the radiation unit, the second patch barrier and the third patch barrier are respectively connected on the two sides opposite to the first patch barrier, and the second patch barrier and the third patch barrier are located on the side of the first patch barrier away from the radiation unit.
24. The omni-directional room-in-a-box antenna of any one of claims 1 to 5, wherein, The surface of the reflecting structure facing the single-arm oscillator comprises a plurality of attached inclined surfaces, the plurality of attached inclined surfaces are sequentially connected around a central axis of the reflecting structure, each of the radiation units is correspondingly installed on each of the attached inclined surfaces, and at least a part of each of the isolation structures is located at a joint of two adjacent attached inclined surfaces.
25. The omni-directional room division antenna of claim 24, wherein, The surface of the reflecting structure facing the single-arm oscillator comprises a plurality of connected inclined surfaces, the attached inclined surfaces comprise first sub-inclined surfaces and second sub-inclined surfaces, the first sub-inclined surfaces of two adjacent attached inclined surfaces are connected, the connected inclined surfaces are located between and connected with the second sub-inclined surfaces of the two adjacent attached inclined surfaces, and at least a part of the isolation structures is located on the connected inclined surfaces.