Omnidirectional indoor distribution antenna

Abstract

The invention provides an omnidirectional indoor distribution antenna, which comprises a vertical polarized antenna, the vertical polarized antenna comprises a conical single-arm oscillator and a conical reflection structure, the conical part of the single-arm oscillator and the conical part of the reflection structure are oppositely arranged, and the conical part of the single-arm oscillator and the conical part of the reflection structure are oppositely arranged; the conical surface of the reflection structure and / or the conical surface of the single-arm oscillator are / is provided with a current extension structure used for prolonging a current path. According to the omni-directional indoor distribution antenna, the purpose of improving the low-frequency-band gain of the vertical polarization antenna can be achieved while the performance of the horizontal polarization antenna is not affected.

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 application and development of indoor communication systems, indoor antennas are increasingly required to meet indoor signal requirements, including miniaturization, broadband, dual-polarization, high gain, wide beam, and good omnidirectionality. This ensures they can provide high-quality and stable coverage in complex indoor environments. For example, in crowded areas like large shopping malls, indoor antennas with broadband and high gain are required to provide more stable, high-speed, and reliable communication services. At the same time, in places like hospitals, dual-polarization and wide beam are required to support high-speed data transmission between medical devices and the connection of smart wearable devices. Furthermore, due to the varying environmental and architectural conditions in different locations, targeted selection and adjustment are required when deploying and designing indoor antennas to achieve optimal coverage.

[0003] Traditional dual-polarization omnidirectional indoor antennas typically use an asymmetric deformed biconical structure for wide vertical frequency coverage and a complementary planar dipole circular array for horizontal polarization. By simply modifying the upper and lower cones of the vertical polarization and the complementary planar dipole circular array of the horizontal polarization, a high-gain horizontal antenna can be designed. This disclosure addresses the challenge of achieving low-band gain improvement for vertically polarized antennas while maintaining performance within a limited footprint.

[0004] Summary of the Invention

[0005] The present disclosure aims to solve at least one of the technical problems existing in the prior art, and proposes an omnidirectional indoor antenna that can achieve the effect of improving the low-frequency gain of a vertically polarized antenna.

[0006] To achieve the above objectives, the present disclosure provides an omnidirectional indoor antenna, comprising:

[0007] A vertically polarized antenna, comprising a conical single-arm dipole and a conical reflective structure, wherein the conical portion of the single-arm dipole and the conical portion of the reflective structure are arranged opposite to each other, and the reflective structure and / or the conical surface of the single-arm dipole have a current extension structure for extending the current path;

[0008] A horizontally polarized antenna is located between the single-arm dipole and the reflective structure.

[0009] Wherein, the flow extension structure includes a gap arranged on the conical surface of the reflection structure and / or the single-arm oscillator.

[0010] Wherein, at least a portion of the gap comprises an arc-shaped gap.

[0011] Wherein, the width of the gap is greater than or equal to 1 mm and less than or equal to 5 mm.

[0012] Wherein, when the gap is arranged on the conical surface of the reflective structure, the gap includes at least one first extension slot, the first extension slot is close to the large diameter end of the reflective structure relative to the small diameter end of the reflective structure, and the first extension slot extends along the circumference of the reflective structure.

[0013] Wherein, a ratio of a distance from the first flow extension slot to a central axis of the reflective structure to a maximum radius of the reflective structure is greater than or equal to 0.3 and less than or equal to 0.95.

[0014] Wherein, when there are a plurality of the first flow extension slits, the plurality of the first flow extension slits are located on the same circumference of the reflective structure and are spaced apart along the circumference of the reflective structure.

[0015] Wherein, the number of the first flow extension slots is greater than or equal to 2 and less than or equal to 6.

[0016] The gap further includes at least one second extension slot, the second extension slot is located between the first extension slot and the small-diameter end of the reflective structure, and the second extension slot extends along the circumference of the reflective structure.

[0017] Wherein, when there are multiple second extension slits, the multiple second extension slits are located on the same circumference of the reflective structure and are spaced apart along the circumference of the reflective structure.

[0018] Wherein, the number of the second flow extension slits is greater than the number of the first flow extension slits.

[0019] Wherein, the number of the second flow extension slots is an integer multiple of the first flow extension slots.

[0020] Wherein, the number of the second flow-extending slits is greater than or equal to 4 and less than or equal to 12.

[0021] Wherein, the gap further includes a plurality of third flow extension slots, and the third flow extension slots are used to connect the first flow extension slot and the second flow extension slot.

[0022] The number of the third extension slits is the same as the larger number of the first extension slits and the second extension slits.

[0023] Wherein, when the gap is arranged on the conical surface of the reflective structure, the gap includes at least one extension portion, the extension portion includes an annular extension section and at least one straight extension section, the straight extension section is connected to the annular extension section, and the straight extension section extends from the annular extension section in a direction away from the small diameter end of the reflective structure.

[0024] Wherein, when there are multiple straight-line flow extension segments, the multiple straight-line flow extension segments are arranged at intervals along the circumference of the annular flow extension segment.

[0025] There are multiple flow extension parts, the annular flow extension segments of the multiple flow extension parts have different diameters and are arranged at intervals along the axial direction of the reflective structure, and two adjacent flow extension parts are connected through the linear flow extension segment.

[0026] The linear extension section of the extension portion close to the large-diameter end of the reflective structure among the plurality of extension portions is connected to the large-diameter end edge of the conical surface of the reflective structure.

[0027] Wherein, when there are two straight-line flow extension sections, the two straight-line flow extension sections are respectively connected to the two ends of the first diameter line of the annular flow extension section.

[0028] Wherein, the first diameter lines of two adjacent extension portions are arranged at an angle.

[0029] Wherein, the first diameter lines of two adjacent extension portions are perpendicular.

[0030] Wherein, the distance between two adjacent annular flow extension sections is greater than or equal to 10 mm and less than or equal to 30 mm.

[0031] Wherein, the flow extension structure includes ridges arranged on the conical surface of the reflective structure.

[0032] The omnidirectional indoor antenna further includes an antenna cover having a receiving space, and the vertically polarized antenna and the horizontally polarized antenna are located in the receiving space. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] 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:

[0034] FIG1 is a schematic diagram of the overall structure of an omnidirectional indoor antenna in an example;

[0035] FIG2 is a side view of the omnidirectional indoor antenna shown in FIG1;

[0036] FIG3 is a top view of the omnidirectional indoor antenna shown in FIG1 ;

[0037] FIG4 shows a graph of the voltage standing wave ratio of the vertically polarized antenna corresponding to the omnidirectional indoor antenna in FIG1 ;

[0038] FIG5 shows the radiation pattern of the vertically polarized antenna corresponding to the omnidirectional room antenna in FIG1 ;

[0039] FIG6 shows a voltage standing wave ratio curve of a horizontally polarized antenna corresponding to the omnidirectional indoor antenna in FIG1 ;

[0040] FIG7 shows the radiation pattern of the horizontally polarized antenna corresponding to the omnidirectional room antenna in FIG1 ;

[0041] FIG8 shows the H-plane radiation pattern of the horizontally polarized antenna corresponding to the omnidirectional indoor antenna in FIG1 at an elevation angle theta = 60°;

[0042] FIG9 is a schematic diagram of the overall structure of an omnidirectional indoor antenna according to an optional embodiment of the present disclosure;

[0043] FIG10 is a side view of the omnidirectional indoor antenna shown in FIG9;

[0044] FIG11 is a top view of the omnidirectional indoor antenna shown in FIG9;

[0045] FIG12 is a top view of the vertically polarized antenna shown in FIG9;

[0046] FIG13 shows a voltage standing wave ratio curve of a vertically polarized antenna corresponding to the omnidirectional indoor antenna in FIG9 ;

[0047] FIG14 shows the radiation pattern of the vertically polarized antenna corresponding to the omnidirectional room antenna in FIG9 ;

[0048] FIG15 shows a voltage standing wave ratio curve of the horizontally polarized antenna corresponding to the omnidirectional indoor antenna in FIG9 ;

[0049] FIG16 shows the radiation pattern of the horizontally polarized antenna corresponding to the omnidirectional room antenna in FIG9 ;

[0050] FIG17 shows the H-plane radiation pattern of the horizontally polarized antenna corresponding to the omnidirectional indoor antenna in FIG9 at an elevation angle theta=60°;

[0051] FIG18 is a schematic diagram of the overall structure of an omnidirectional indoor antenna according to another optional embodiment of the present disclosure;

[0052] FIG19 is a side view of the omnidirectional indoor antenna shown in FIG18;

[0053] FIG20 is a top view of the omnidirectional indoor antenna shown in FIG18;

[0054] FIG21 is a top view of the vertically polarized antenna shown in FIG18;

[0055] FIG22 shows a graph of the voltage standing wave ratio of the vertically polarized antenna corresponding to the omnidirectional indoor antenna in FIG18;

[0056] FIG23 shows the radiation pattern of the vertically polarized antenna corresponding to the omnidirectional room antenna in FIG18;

[0057] FIG24 shows a graph of the voltage standing wave ratio of the horizontally polarized antenna corresponding to the omnidirectional indoor antenna in FIG18;

[0058] FIG25 shows the radiation pattern of the horizontally polarized antenna corresponding to the omnidirectional room antenna in FIG18;

[0059] FIG26 shows the H-plane radiation pattern of the horizontally polarized antenna corresponding to the omnidirectional indoor antenna in FIG18 at an elevation angle theta=60°;

[0060] FIG27 is a schematic diagram of the overall structure of an omnidirectional indoor antenna according to another optional embodiment of the present disclosure;

[0061] FIG28 is a side view of the omnidirectional indoor antenna shown in FIG27;

[0062] FIG29 is a top view of the omnidirectional indoor antenna shown in FIG27;

[0063] FIG30 is a top view of the vertically polarized antenna shown in FIG27;

[0064] FIG31 shows a graph of the voltage standing wave ratio of the vertically polarized antenna corresponding to the omnidirectional indoor antenna in FIG27;

[0065] FIG32 shows the radiation pattern of the vertically polarized antenna corresponding to the omnidirectional room antenna in FIG27;

[0066] FIG33 shows a graph of the voltage standing wave ratio of the horizontally polarized antenna corresponding to the omnidirectional indoor antenna in FIG27;

[0067] FIG34 shows the radiation pattern of the horizontally polarized antenna corresponding to the omnidirectional room antenna in FIG27;

[0068] FIG35 shows the H-plane radiation pattern of the horizontally polarized antenna corresponding to the omnidirectional indoor antenna in FIG27 at an elevation angle theta=60°;

[0069] FIG36 is a schematic diagram of the overall structure of an omnidirectional indoor antenna according to another optional embodiment of the present disclosure;

[0070] FIG37 is a side view of the omnidirectional room antenna shown in FIG36;

[0071] FIG38 is a top view of the omnidirectional indoor antenna shown in FIG36;

[0072] FIG39 is a top view of the vertically polarized antenna shown in FIG36;

[0073] FIG40 shows a graph of the voltage standing wave ratio of the vertically polarized antenna corresponding to the omnidirectional indoor antenna in FIG36;

[0074] FIG41 shows the radiation pattern of the vertically polarized antenna corresponding to the omnidirectional room antenna in FIG36;

[0075] FIG42 shows a graph of the voltage standing wave ratio of the horizontally polarized antenna corresponding to the omnidirectional indoor antenna in FIG36;

[0076] FIG43 shows the radiation pattern of the horizontally polarized antenna corresponding to the omnidirectional room antenna in FIG36;

[0077] FIG44 shows the H-plane radiation pattern of the horizontally polarized antenna corresponding to the omnidirectional indoor antenna in FIG36 at an elevation angle theta=60°;

[0078] FIG45 is a schematic diagram of the overall structure of an omnidirectional indoor antenna according to another embodiment of the present disclosure;

[0079] FIG46 is a side view of the omnidirectional room antenna shown in FIG45;

[0080] FIG47 is a top view of the omnidirectional room antenna shown in FIG45;

[0081] FIG48 is a top view of the vertically polarized antenna shown in FIG45;

[0082] FIG49 shows a graph of the voltage standing wave ratio of the vertically polarized antenna corresponding to the omnidirectional indoor antenna in FIG45 ;

[0083] FIG50 shows the radiation pattern of the vertically polarized antenna corresponding to the omnidirectional room antenna in FIG45;

[0084] FIG51 shows a graph of the voltage standing wave ratio of the horizontally polarized antenna corresponding to the omnidirectional indoor antenna in FIG45 ;

[0085] FIG52 shows the radiation pattern of the horizontally polarized antenna corresponding to the omnidirectional room antenna in FIG45;

[0086] FIG53 shows the H-plane radiation pattern of the horizontally polarized antenna corresponding to the omnidirectional indoor antenna in FIG45 at an elevation angle of theta = 60°;

[0087] FIG54 is a schematic diagram of the overall structure of an omnidirectional indoor antenna according to another optional embodiment of the present invention;

[0088] FIG55 is a side view of the omnidirectional room antenna shown in FIG54;

[0089] FIG56 is a top view of the omnidirectional indoor antenna shown in FIG54;

[0090] FIG57 is a top view of the vertically polarized antenna shown in FIG54;

[0091] FIG58 shows a graph of the voltage standing wave ratio of the vertically polarized antenna corresponding to the omnidirectional indoor antenna in FIG54 ;

[0092] FIG59 shows the radiation pattern of the vertically polarized antenna corresponding to the omnidirectional room antenna in FIG54;

[0093] FIG60 shows a graph of the voltage standing wave ratio of the horizontally polarized antenna corresponding to the omnidirectional indoor antenna in FIG54;

[0094] FIG61 shows the radiation pattern of the horizontally polarized antenna corresponding to the omnidirectional room antenna in FIG54;

[0095] FIG62 shows the H-plane radiation pattern of the horizontally polarized antenna corresponding to the omnidirectional indoor antenna in FIG54 at an elevation angle theta=60°. DETAILED DESCRIPTION

[0096] 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.

[0097] 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.

[0098] 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.

[0099] 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°.

[0100] 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.

[0101] 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.

[0102] An exemplary omnidirectional indoor antenna includes a vertically polarized antenna and a horizontally polarized antenna 30 formed by a single-arm dipole 10 and a reflective structure 20, as shown in FIG. 1 to FIG. 8 .

[0103] Table 1 below shows some simulation results of the omnidirectional indoor antennas corresponding to Figures 1 to 8.

[0104] Table 1

[0105] From Table 1, it can be seen that the voltage standing wave ratio of the vertically polarized antenna is less than 1.5, and the gain in the range of 889 to 949 MHz is 0.9 dBi. The voltage standing wave ratio of the horizontally polarized antenna is less than 1.3, and the gain in the range of 2515 to 2675 MHz is 7.1 dBi. The circularity of the radiation pattern is ±1.5 dB.

[0106] As shown in FIG. 9 to FIG. 12 , an embodiment of the present disclosure provides an omnidirectional indoor antenna, which includes a vertically polarized antenna and a horizontally polarized antenna 30 .

[0107] The vertically polarized antenna includes a tapered single-arm oscillator 10 and a tapered reflector 20. The tapered portions of the single-arm oscillator 10 and the reflector 20 are positioned opposite each other. The reflector 20 has a current extension structure on its tapered surface, which extends the current path. This extension structure improves the low-frequency gain of the vertically polarized antenna and effectively increases the bandwidth of the omnidirectional indoor antenna.

[0108] The omnidirectional indoor antenna also includes a radome 40, which has a housing for the vertically polarized antenna and the horizontally polarized antenna 30. The radome 40 is positioned outside the vertically polarized antenna and the horizontally polarized antenna 30 to prevent collisions with other components, thereby improving the operational stability of the vertically polarized antenna and the horizontally polarized antenna 30.

[0109] In an optional embodiment, the reflective structure 20 includes a tapered portion and an annular lower edge 27 connected to the larger diameter end of the tapered portion. The diameter of the annular lower edge 27 is the same as the diameter of the larger diameter end of the tapered portion. The provision of the lower edge 27 increases the space enclosed by the reflective structure 20, which is conducive to accommodating other structures.

[0110] Of course, setting the current extension structure on the conical surface of the single-arm oscillator 10 can also achieve the purpose of extending the current path and improving the low-frequency gain of the vertically polarized antenna, and no specific limitation is made here.

[0111] For example, the omnidirectional room antenna can be provided with a flow extension structure only on the conical single-arm oscillator 10, or only on the conical reflective structure 20. Of course, the flow extension structure can also be provided on both the conical single-arm oscillator 10 and the conical reflective structure 20. No specific limitation is made here. In order to illustrate the specific structure of the flow extension structure, the embodiment of the present disclosure takes the example of providing the flow extension structure only on the conical reflective structure 20. At the same time, the flow extension structure is also applicable to the single-arm oscillator 10. The embodiment of the present disclosure no longer separately describes the provision of the flow extension structure on the single-arm oscillator 10.

[0112] The horizontally polarized antenna 30 is located between the single-arm oscillator 10 and the reflective structure 20. The horizontally polarized antenna 30 includes a feed network 31, a dipole 32, a ground layer 33, and a dielectric substrate 34. The feed network 31 and the ground layer 33 are respectively located on opposite sides of the dielectric substrate 34. The dipole 32 can be located on the same side as the feed network 31 or on different sides. There is no specific limitation here. The mutual cooperation of the feed network 31, the dipole 32, the ground layer 33 and other structures can achieve horizontal polarization. The feed network 31 has multiple feed lines 311. The number of feed lines 311 shown in the figure is 6, but the number of feed lines 311 is not limited to 6 and can also be other numbers. Here, only 6 are used as an example for explanation.

[0113] In the disclosed embodiment, the current extension structure includes a slot provided on the conical surface of the reflective structure 20. By providing the slot on the conical surface of the reflective structure 20, the current path can be extended, thereby improving the low-frequency gain of the vertically polarized antenna.

[0114] Specifically, at least a portion of the slot includes an arc-shaped slot. By providing the arc-shaped slot, the current can flow a certain distance in the circumferential direction of the cone surface, further extending the current path, which has a more significant effect on improving the low-frequency gain of the vertically polarized antenna.

[0115] Of course, the extended flow structure may also include a slit provided on the conical surface of the single-arm oscillator 10. The technical effect is the same as that of the slit provided on the conical surface of the reflective structure 20, and will not be described in detail here.

[0116] In the disclosed embodiment, the width of the gap is greater than or equal to 1 mm and less than or equal to 5 mm. If the gap width is less than 1 mm, it will be difficult to process, increasing the difficulty and cost of production. If the gap width is greater than 5 mm, it will easily affect the performance of other frequency bands.

[0117] In the disclosed embodiment, when slots are provided on the conical surface of the reflective structure 20, the slots include a plurality of first extension slots 21. The first extension slots 21 are located closer to the large-diameter end of the reflective structure 20 than to the small-diameter end of the reflective structure 20, and extend circumferentially along the reflective structure 20. For the same arc, placing the first extension slots 21 closer to the large-diameter end of the reflective structure 20 helps extend the length of the first extension slots 21, thereby effectively extending the current path and improving the low-frequency gain of the vertically polarized antenna.

[0118] Specifically, the ratio of the distance from the first extension slit 21 to the central axis of the reflective structure 20 to the maximum radius of the reflective structure 20 is greater than or equal to 0.3 and less than or equal to 0.95. If the ratio of the distance from the first extension slit 21 to the central axis of the reflective structure 20 to the maximum radius of the reflective structure 20 is less than 0.3, the length of the first extension slit 21 is relatively short, which is not conducive to improving the current path. If the ratio of the distance from the first extension slit 21 to the central axis of the reflective structure 20 to the maximum radius of the reflective structure 20 is greater than 0.95, the first extension slit 21 is too close to the lower edge of the reflective structure 20, making it difficult to process the first extension slit 21.

[0119] It should be noted that the length of the current path is related to the specific operating frequency band, and the longer the current path, the better.

[0120] In the specific embodiments shown in Figures 9 and 11, multiple first extension slots 21 are located on the same circumference of the reflective structure 20 and are spaced apart along the circumference of the reflective structure 20. This arrangement facilitates the distribution of the first extension slots 21 in different directions, thereby improving the low-frequency gain of the vertically polarized antenna.

[0121] Optionally, the number of the first flow extension slits 21 is greater than or equal to 1 and less than or equal to 6. It should be noted that when the number of the first flow extension slit 21 is 1, the first flow extension slit 21 is not a circular slit connected end to end, but an arc-shaped slit.

[0122] If the number of the first extension slits 21 is greater than 6, the length of the first extension slits 21 will be short, which is not conducive to extending the current path.

[0123] In the specific embodiments shown in FIG. 9 and FIG. 11 , the number of the first flow extension slits 21 is three. Of course, the number of the first flow extension slits 21 can be other numbers, which is not specifically limited here.

[0124] As can be seen from Figures 9 to 12 , the omnidirectional indoor antenna in this embodiment is provided with a flow extension structure on the reflective structure 20. Table 2 below shows some simulation results of the omnidirectional indoor antenna corresponding to Figure 9 .

[0125] Table 2

[0126] It can be seen from Figures 9 to 12 that the reflective structure 20 of the omnidirectional room antenna in this embodiment has three first extension slots 21. Figures 13 to 17 are partial simulation results of the antenna obtained by the omnidirectional room antenna shown in Figures 9 to 12. Table 2 is a summary table of the simulation results of the omnidirectional room antenna corresponding to Figure 9. It can be seen from Table 2 that the voltage standing wave ratio of the vertically polarized antenna is less than 1.7 and the gain is 1.3dBi in the range of 889 to 949MHz. The voltage standing wave ratio of the horizontally polarized antenna is less than 1.3, the gain is 6.9dBi in the range of 2515 to 2675MHz, and the circularity of the radiation pattern is ±1.5dB.

[0127] The simulation results summarized in Tables 1 and 2 show that, compared to the examples shown in Figures 1 to 8 , the corresponding vertically polarized antenna in this embodiment achieves a gain improvement of 0.4 dB in the 889-949 MHz range and 0.7 dB in the 1885-2025 MHz range, while the gain, bandwidth, and non-circularity of the horizontally polarized antenna remain largely unchanged. This demonstrates that the multiple first flow-extending slots 21 provided in the reflective structure 20 have minimal impact on the tapered main body of the reflective structure 20, achieving the goal of extending the current path and improving the low-frequency gain of the vertically polarized antenna without affecting the performance of the horizontally polarized antenna 30.

[0128] In some optional embodiments, the gap further includes at least one second extension gap 22. That is, in this embodiment, the gap includes a first extension gap 21 and a second extension gap 22. Specifically, referring to Figures 18 to 21, the second extension gap 22 is located between the first extension gap 21 and the small-diameter end of the reflective structure 20, and the second extension gap 22 extends along the circumference of the reflective structure 20. By simultaneously providing the first extension gap 21 and the second extension gap 22 on the reflective structure 20, the current path can be extended at different locations. In other words, the design of the first extension gap 21 and the second extension gap 22 can achieve a secondary extension of the current path.

[0129] Specifically, when the current flows to the first extension slot 21, the current flows along the extension direction of the first extension slot 21, thereby extending the primary path. When the current flows to the second extension slot 22, the current flows along the extension direction of the second extension slot 22, thereby extending the secondary path.

[0130] In the specific embodiments shown in Figures 19 and 21, when there are multiple second extension slits 22, the multiple second extension slits 22 are located on the same circumference of the reflective structure 20 and are spaced apart along the circumference of the reflective structure 20. This arrangement facilitates the distribution of the second extension slits 22 in different directions, thereby improving the low-frequency gain of the vertically polarized antenna.

[0131] In the specific embodiment shown in FIG. 21 , the number of the second casting slots 22 is greater than the number of the first casting slots 21 .

[0132] Specifically, the ratio of the distance from the second extension slit 22 to the central axis of the reflective structure 20 to the distance from the first extension slit 21 to the central axis of the reflective structure 20 is greater than or equal to 0.3 and less than or equal to 0.7. If the ratio of the distance from the second extension slit 22 to the central axis of the reflective structure 20 to the distance from the first extension slit 21 to the central axis of the reflective structure 20 is less than 0.3, the distance between the first extension slit 21 and the second extension slit 22 is too small, which is not conducive to the processing and manufacturing of the reflective structure 20. If the ratio of the distance from the second extension slit 22 to the central axis of the reflective structure 20 to the distance from the first extension slit 21 to the central axis of the reflective structure 20 is greater than 0.7, it is likely to affect the performance of other frequency bands.

[0133] Optionally, the number of the second extending slits 22 is an integer multiple of the number of the first extending slits 21. Of course, the number of the second extending slits 22 and the number of the first extending slits 21 may not be an integer multiple, and this is not specifically limited.

[0134] In the specific embodiment shown in FIG. 21 , the number of the second casting slots 22 is twice the number of the first casting slots 21 .

[0135] Optionally, the number of the second flow-extending slits 22 is greater than or equal to 4 and less than or equal to 12. In the specific embodiment shown in Figure 21, the number of the second flow-extending slits 22 is 6. Of course, other numbers are also possible and are not specifically limited here.

[0136] As can be seen from Figures 18 to 21, the omnidirectional indoor antenna in this embodiment is provided with a flow extension structure on the reflective structure. Table 3 below shows some simulation results of the omnidirectional indoor antenna corresponding to Figure 18.

[0137] Table 3

[0138] It can be seen from Figures 18 to 21 that the reflective structure 20 of the omnidirectional room antenna in this embodiment has three first extension slots 21 and six second extension slots 22. Figures 22 to 26 are the antenna partial simulation results obtained by the omnidirectional room antenna shown in Figures 18 to 21. Table 3 is a summary table of the simulation results of the omnidirectional room antenna corresponding to Figure 18. It can be seen from Table 3 that the voltage standing wave ratio of the vertically polarized antenna is less than 1.7, and the gain in the range of 889 to 949 MHz is 1.3 dBi. The voltage standing wave ratio of the horizontally polarized antenna is less than 1.5, and the gain in the range of 2515 to 2675 MHz is 6.9 dBi, and the circularity of the radiation pattern is ±1.5 dB.

[0139] Comparison of the simulation results in Table 1 and Table 3 shows that this embodiment can also achieve the effect of improving the low-frequency gain of the vertically polarized antenna without affecting the performance of the horizontally polarized antenna 30 .

[0140] A comparison of the simulated structures in Tables 2 and 3 shows that the newly added second flow extension slot 22 of the omnidirectional indoor antenna in this embodiment has a significant impact on the 1885-2025 MHz frequency band, while the remaining performance is similar to that of the embodiment shown in Table 2. The flow extension structure can be selected and used based on the antenna's requirements.

[0141] In other optional embodiments, the gap also includes multiple third extension gaps 23, that is, in this embodiment, the gap includes a first extension gap 21, a second extension gap 22 and a third extension gap 23, see Figures 27 to 30 for details, the third extension gap 23 is used to connect the first extension gap 21 and the second extension gap 22.

[0142] In the specific embodiment shown in Figure 30, the two ends of the third extension slot 23 are respectively connected to the first extension slot 21 and the second extension slot 22, so that the current flows in the first extension slot 21, the second extension slot 22 and the third extension slot 23, effectively extending the current path and achieving the effect of improving the low-frequency band gain of the vertically polarized antenna.

[0143] Optionally, the number of the third extension slits 23 is the same as the larger number of the first extension slits 21 and the second extension slits 22. In the specific embodiment shown in FIG30, the number of the second extension slits 22 is greater than the number of the first extension slits 21, and the number of the third extension slits 23 is the same as the number of the second extension slits 22.

[0144] In the specific embodiment shown in FIG30 , the first extension slit 21 and the second extension slit 22 are arc-shaped, and the third extension slit 23 is straight-line.

[0145] As can be seen from Figures 27 to 30, the omnidirectional indoor antenna in this embodiment is provided with a first extension slot 21, a second extension slot 22, and a third extension slot 23 on the reflective structure. Table 4 below shows some simulation results of the omnidirectional indoor antenna corresponding to Figure 27.

[0146] Table 4

[0147] It can be seen from Figures 27 to 30 that the reflective structure 20 of the omnidirectional room antenna in this embodiment has three first extension slots 21, six second extension slots 22 and six third extension slots 23. Figures 31 to 35 are the antenna partial simulation results obtained by the omnidirectional room antenna shown in Figures 27 to 30. Table 4 is a summary table of the simulation results of the omnidirectional room antenna corresponding to Figure 27. It can be seen from Table 4 that the voltage standing wave ratio of the vertically polarized antenna is less than 1.6, and the gain in the range of 889 to 949 MHz is 1.2 dBi. The voltage standing wave ratio of the horizontally polarized antenna is less than 1.3, the gain in the range of 2515 to 2675 MHz is 6.7 dBi, and the circularity of the radiation pattern is ±1.5 dB.

[0148] Comparison of the simulation results in Tables 1 and 4 shows that this embodiment can also achieve the effect of improving the low-frequency gain of the vertically polarized antenna without affecting the performance of the horizontally polarized antenna 30. However, due to the dense slot design, the performance of other frequency bands of vertical polarization is significantly affected, and the gain of horizontal polarization is also reduced. The technical solution of this disclosure can be selected according to specific application requirements.

[0149] Comparison of the simulation structures in Table 2 and Table 4 shows that although a continuous current path along the radial direction can still be formed on the reflective structure 20 of this embodiment, the gaps are relatively dense, and the mutual coupling of currents in the inner region of the gaps has a greater impact on the performance of other frequency bands.

[0150] In other optional embodiments, when the slot is provided on the conical surface of the reflective structure 20, the slot is an integrated structure, as specifically seen in Figures 36 to 39. In this embodiment, the slot includes at least one extension portion 24, which includes an annular extension section 25 and at least one linear extension section 26. The linear extension section 26 is connected to the annular extension section 25 and extends from the annular extension section 25 in a direction away from the small-diameter end of the reflective structure 20.

[0151] Specifically, when there are multiple linear flow extension segments 26, the multiple linear flow extension segments 26 are spaced apart along the circumference of the annular flow extension segment 25. It should be noted that the multiple linear flow extension segments 26 can be connected to the annular flow extension segment 25 at equal intervals or at unequal intervals, which is not specifically limited here.

[0152] In the specific embodiment shown in Figure 39, there are two straight extension sections 26, which are respectively connected to the two ends of the first diameter line of the annular extension section 25. In other words, the extension section 24 has a symmetrical structure, which is conducive to uniform current distribution.

[0153] In the specific embodiment shown in Figure 39, the slot includes a continuous extension portion 24 that divides the reflective structure 20 into discrete regions. The presence of an annular extension segment 25 within the extension portion 24 prevents current from flowing directly from the outer edge of the cone to the center of the cone. This impacts the performance of the vertically polarized antenna in some frequency bands and significantly affects the out-of-roundness of the horizontally polarized antenna. However, the design of the extension portion 24 improves the low-frequency gain of the vertically polarized antenna.

[0154] As can be seen from Figures 36 to 44, the omnidirectional indoor antenna in this embodiment is provided with an extension portion 24 on the reflective structure. Table 5 below shows some simulation results of the omnidirectional indoor antenna corresponding to Figure 36.

[0155] Table 5

[0156] It can be seen from Figures 36 to 39 that the reflective structure 20 of the omnidirectional room antenna in this embodiment has an extension portion 24, and the extension portion 24 has an annular extension section 25 and two symmetrically arranged straight extension sections 26. Figures 40 to 44 are the antenna partial simulation results obtained by the omnidirectional room antenna shown in Figures 36 to 39. Table 5 is a summary table of the simulation results of the omnidirectional room antenna corresponding to Figure 36. It can be seen from Table 5 that the voltage standing wave ratio of the vertically polarized antenna is less than 1.5, and the gain in the range of 889 to 949 MHz is 1.1 dBi. The voltage standing wave ratio of the horizontally polarized antenna is less than 1.5, and the gain in the range of 2515 to 2675 MHz is 6.9 dBi, and the circularity of the radiation pattern is ±4 dB.

[0157] Comparison of the simulation results in Tables 1 and 5 shows that the extended-flow structure in this embodiment can improve the low-frequency gain of the vertically polarized antenna without affecting the performance of the horizontally polarized antenna 30. However, it has a significant impact on the out-of-roundness of the horizontally polarized antenna. The technical solution in this embodiment can be selected based on specific application requirements.

[0158] A comparison of the simulated structures in Tables 2 and 5 shows that the out-of-roundness of the horizontally polarized antenna in this embodiment is seriously deteriorated. In addition, the presence of the continuous gap blocks the current on the reflective structure 20 from flowing radially from the outside of the cone to the center of the cone, which also affects the performance of some frequency bands of the vertically polarized antenna.

[0159] In other optional embodiments, as shown in Figures 45 to 48, there are multiple flow extensions 24, and the annular flow extension segments 25 of the multiple flow extensions 24 have different diameters and are spaced apart along the axial direction of the reflective structure 20. Adjacent flow extensions 24 are connected by a linear flow extension segment 26. The annular flow extension segments 25 of different flow extensions 24 have different diameters. In other words, the multiple flow extensions 24 are connected to form a continuous gap, which divides the entire conical reflective structure 20 into multiple independent parts. These multiple independent parts are supported by auxiliary structures, so that the multiple independent parts appear to be a single conical structure as a whole. The auxiliary structures are not described in detail here; it is sufficient that the auxiliary structures can support the multiple independent parts.

[0160] In the specific embodiments shown in Figures 45 and 48 , the linear extension segments 26 of the extension segments 24 near the large-diameter end of the reflective structure 20 are connected to the large-diameter edge of the tapered surface of the reflective structure 20. This facilitates current flow along the path within the extension segments 24, extending the current path and facilitating gain enhancement in the low-frequency band.

[0161] Specifically, when the flow extension portion 24 has two linear extension sections 26, the first diameter lines of the two adjacent flow extension sections 24 are arranged at an angle. This arrangement allows current to flow a certain distance along the annular extension section 25 of the flow extension portion 24 before flowing into the linear extension section 26 of the next flow extension portion 24, effectively reducing the risk of current directly flowing from the linear extension section 26 of one flow extension portion 24 to the linear extension section 26 of the next flow extension portion 24.

[0162] Preferably, the first diameter lines of two adjacent extensions 24 are perpendicular. When each extension 24 has two straight extension sections 26 , this arrangement allows the current to flow the maximum distance along the annular extension section 25 of each extension 24 before flowing into the next extension 24 .

[0163] It should be noted that the distance between two adjacent annular extension sections 25 is greater than or equal to 10 mm and less than or equal to 30 mm. If the distance between two adjacent annular extension sections 25 is less than 10 mm, the distance between the two adjacent annular extension sections 25 is too small, which is not conducive to the processing and manufacturing of the reflective structure 20. If the distance between two adjacent annular extension sections 25 is greater than 30 mm, it is likely to affect the performance of other frequency bands.

[0164] In the specific embodiment shown in Figure 48, there are two extension parts 24, each of which has two straight extension sections 26, and the annular extension sections 25 of the two extension parts 24 are connected by the straight extension section 26 of the inner extension part 24 to form an integrated gap.

[0165] As can be seen from Figures 45 to 48, the omnidirectional indoor antenna in this embodiment is provided with two extension portions 24 on the reflective structure. Table 6 below shows some simulation results of the omnidirectional indoor antenna corresponding to Figure 45.

[0166] Table 6

[0167] It can be seen from Figures 45 to 48 that the reflective structure 20 of the omnidirectional room antenna in this embodiment has two extension parts 24, each extension part 24 has an annular extension section 25 and two symmetrically arranged straight extension sections 26, and the two straight extension sections 26 located on the inner side of the extension part 24 are connected to the annular extension section 25 of the extension part 24 located on the outer side. Figures 49 to 53 are the antenna part simulation results obtained by the omnidirectional room antenna shown in Figures 45 to 48. Table 6 is a summary table of the simulation results of the omnidirectional room antenna corresponding to Figure 45. It can be seen from Table 6 that the voltage standing wave ratio of the vertically polarized antenna is less than 1.5, and the gain in the range of 889 to 949 MHz is 1.2 dBi. The voltage standing wave ratio of the horizontally polarized antenna is less than 1.3, the gain in the range of 2515 to 2675 MHz is 7 dBi, and the circularity of the radiation pattern is ±2.5 dB.

[0168] Comparison of the simulation results in Table 5 and Table 6 shows that the out-of-roundness of the horizontally polarized antenna in this embodiment is slightly improved, but due to the increase in the slot density, different frequency bands of the vertically polarized antenna are greatly affected.

[0169] Comparison of the simulation results in Table 1 and Table 6 shows that the extended flow structure in this embodiment can achieve the effect of improving the low-frequency gain of the vertically polarized antenna without affecting the performance of the horizontally polarized antenna 30 .

[0170] In another optional embodiment, there are three extension portions 24, specifically referring to Figures 54 to 57, and each of the three extension portions has two straight extension segments 26, and the annular extension segments 25 of two adjacent extension portions 24 are connected by the straight extension segment 26 of the inner extension portion 24 to form an integrated gap.

[0171] As can be seen from Figures 54 to 57, the omnidirectional indoor antenna in this embodiment is provided with three extension portions 24 on the reflective structure. Table 7 below shows some simulation results of the omnidirectional indoor antenna corresponding to Figure 54.

[0172] Table 7

[0173] It can be seen from Figures 54 to 57 that the reflective structure 20 of the omnidirectional room antenna in this embodiment has three extension parts 24, each extension part 24 has an annular extension section 25 and two symmetrically arranged straight extension sections 26, and the two straight extension sections 26 located on the inner side of the extension part 24 are connected to the annular extension section 25 of the extension part 24 located on the outer side. Figures 58 to 62 are the antenna part simulation results obtained by the omnidirectional room antenna shown in Figures 54 to 57. Table 7 is a summary table of the simulation results of the omnidirectional room antenna corresponding to Figure 54. It can be seen from Table 7 that the voltage standing wave ratio of the vertically polarized antenna is less than 1.6, and the gain in the range of 889 to 949 MHz is 1.2 dBi. The voltage standing wave ratio of the horizontally polarized antenna is less than 1.3, the gain in the range of 2515 to 2675 MHz is 7 dBi, and the circularity of the radiation pattern is ±3 dB.

[0174] Comparing the simulation results in Tables 6 and 7 shows that the gain of the vertically polarized antenna decreases in the 1885-2025 MHz range, but increases in the 2300-2390 MHz range. This demonstrates that slot density is not necessarily negative; certain slot designs may actually enhance gain at specific frequencies.

[0175] Comparison of the simulation results in Table 1 and Table 7 shows that the extended flow structure in this embodiment can achieve the effect of improving the low-frequency gain of the vertically polarized antenna without affecting the performance of the horizontally polarized antenna 30 .

[0176] In another optional embodiment, the current extension structure includes ridges disposed on the conical surface of the reflective structure 20. The current extension structure can be a ridge disposed on the conical surface of the reflective structure 20, and the ridges can be metal ridges. The provision of the ridges can extend the current path and improve the low-frequency gain of the vertically polarized antenna.

[0177] Optionally, the ridge has an arc-shaped segment to further extend the flow path of the current.

[0178] In some examples, the omnidirectional indoor antenna can be a transceiver antenna, that is, it can both transmit and receive electromagnetic wave signals. Of course, the omnidirectional indoor antenna is not limited to the above structure, but also includes a transceiver unit, a radio frequency transceiver, a signal amplifier, a power amplifier, and a filter unit. The antenna in the communication device can be used as a transmitting antenna or a receiving antenna. Among them, the transceiver unit may include a baseband and a receiving end. The baseband provides a signal of at least one frequency band, such as a 2G signal, a 3G signal, a 4G signal, a 5G signal, etc., and sends a signal of at least one frequency band to the radio frequency transceiver. After the antenna in the communication system receives the signal, it can be processed by the filter unit, the power amplifier, the signal amplifier, and the radio frequency transceiver and then transmitted to the receiving end in the transceiver unit. The receiving end can be, for example, a smart gateway.

[0179] Furthermore, a radio frequency transceiver is connected to the transceiver unit and is used to modulate the signals sent by the transceiver unit or to demodulate the signals received by the antenna and transmit them back to the transceiver unit. Specifically, the radio frequency transceiver may include a transmitting circuit, a receiving circuit, a modulation circuit, and a demodulation circuit. After the transmitting circuit receives various types of signals provided by the baseband, the modulation circuit can modulate these various types of signals provided by the baseband and then transmit them to the antenna. The antenna receives the signal and transmits it to the receiving circuit of the radio frequency transceiver. The receiving circuit transmits the signal to the demodulation circuit, which demodulates the signal and transmits it to the receiving end.

[0180] Furthermore, the RF transceiver is connected to a signal amplifier and a power amplifier, which are then connected to a filtering unit, which is connected to at least one antenna. When the communication system transmits signals, the signal amplifier is used to increase the signal-to-noise ratio of the signal output by the RF transceiver before transmitting it to the filtering unit. The power amplifier is used to amplify the power of the signal output by the RF transceiver before transmitting it to the filtering unit. The filtering unit may specifically include a duplexer and a filtering circuit. The filtering unit combines the signals output by the signal amplifier and the power amplifier, filters out noise, and then transmits them to the antenna, which radiates the signal. When the communication system receives signals, the antenna receives the signal and transmits it to the filtering unit. The filtering unit filters out noise from the signal received by the antenna and transmits it to the signal amplifier and power amplifier. The signal amplifier amplifies the signal received by the antenna to increase the signal-to-noise ratio. The power amplifier amplifies the power of the signal received by the antenna. The signal received by the antenna is processed by the power amplifier and the signal amplifier before being transmitted to the RF transceiver, which then transmits it to the transceiver unit.

[0181] In some examples, the signal amplifier may include various types of signal amplifiers, such as a low noise amplifier, which is not limited herein.

[0182] In some examples, the omnidirectional room antenna provided by the embodiments of the present disclosure further includes a power management unit, which is connected to a power amplifier and provides the power amplifier with a voltage for amplifying the signal. It will be understood that the above embodiments are merely exemplary embodiments adopted to illustrate the principles of the present disclosure, but the present disclosure is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence 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 in-building antenna, wherein, comprising: a vertically polarized antenna, the vertically polarized antenna includes a conical single-arm oscillator and a conical reflection structure, the conical part of the single-arm oscillator and the conical part of the reflection structure are arranged opposite to each other, and a current extension structure for extending the current path is provided on the conical surface of the reflection structure and / or the single-arm oscillator; a horizontally polarized antenna, the horizontally polarized antenna is located between the single-arm oscillator and the reflection structure.

2. The omnidirectional in-building antenna according to claim 1, wherein, the current extension structure includes a slit provided on the conical surface of the reflection structure and / or the single-arm oscillator.

3. The omnidirectional in-building antenna according to claim 2, wherein, at least a part of the slit includes an arc-shaped slit.

4. The omnidirectional in-building antenna according to claim 2, wherein, the width of the slit is greater than or equal to 1 mm and less than or equal to 5 mm.

5. The omnidirectional in-building antenna according to claim 2, wherein, the slit is provided on the conical surface of the reflection structure and includes at least one first current extension slit, the first current extension slit is closer to the large-diameter end of the reflection structure than the small-diameter end of the reflection structure, and the first current extension slit extends along the circumferential direction of the reflection structure.

6. The omnidirectional in-building antenna according to claim 5, wherein, the ratio between the distance from the first current extension slit to the central axis of the reflection structure and the maximum radius of the reflection structure is greater than or equal to 0.3 and less than or equal to 0.

95.

7. The omnidirectional in-building antenna according to claim 5, wherein, there are multiple first current extension slits, and the multiple first current extension slits are located on the same circumference of the reflection structure and are arranged at intervals along the circumferential direction of the reflection structure.

8. The omnidirectional in-building antenna according to claim 5, wherein, the slit further includes at least one second current extension slit, the second current extension slit is located between the first current extension slit and the small-diameter end of the reflection structure, and the second current extension slit extends along the circumferential direction of the reflection structure.

9. The omnidirectional in-building antenna according to claim 8, wherein, there are multiple second current extension slits, and the multiple second current extension slits are located on the same circumference of the reflection structure and are arranged at intervals along the circumferential direction of the reflection structure.

10. The omnidirectional in-building antenna according to claim 8, wherein, the number of the second current extension slits is greater than the number of the first current extension slits.

11. The omnidirectional in-building antenna according to claim 8, wherein, the number of the second current extension slits is an integer multiple of the number of the first current extension slits.

12. The omnidirectional in-building antenna according to claim 8, wherein, the slit further includes multiple third current extension slits, and the third current extension slits are used to connect the first current extension slits and the second current extension slits.

13. The omnidirectional in-building antenna according to claim 12, wherein, the number of the third current extension slits is the same as the larger number of the first current extension slits and the second current extension slits.

14. The omnidirectional in-building antenna according to claim 2, wherein, The slit is arranged on the conical surface of the reflection structure. The slit includes at least one current extension part, and the current extension part includes an annular current extension section and at least one linear current extension section. The linear current extension section is connected to the annular current extension section, and the linear current extension section extends from the annular current extension section in a direction away from the small-diameter end of the reflection structure.

15. The omnidirectional indoor distributed antenna according to claim 14, wherein, There are a plurality of the linear current extension sections, and the plurality of linear current extension sections are arranged at intervals along the circumferential direction of the annular current extension section.

16. The omnidirectional indoor distributed antenna according to claim 14, wherein, There are a plurality of the current extension parts, the diameters of the annular current extension sections of the plurality of current extension parts are different and are arranged at intervals along the axial direction of the reflection structure, and adjacent two current extension parts are communicated through the linear current extension section.

17. The omnidirectional indoor distributed antenna according to claim 16, wherein, The linear current extension section of the current extension part close to the large-diameter end of the reflection structure among the plurality of current extension parts is connected to the edge of the large-diameter end of the conical surface of the reflection structure.

18. The omnidirectional indoor distributed antenna according to claim 16, wherein, There are two linear current extension sections, and the two linear current extension sections are respectively connected to both ends of the first diameter line of the annular current extension section.

19. The omnidirectional indoor distributed antenna according to claim 18, wherein, The first diameter lines of adjacent two current extension parts are arranged at an angle.

20. The omnidirectional indoor distributed antenna according to claim 19, wherein, The first diameter lines of adjacent two current extension parts are perpendicular.

21. The omnidirectional indoor distributed antenna according to claim 16, wherein, The distance between adjacent two annular current extension sections is greater than or equal to 10 mm and less than or equal to 30 mm.

22. The omnidirectional indoor distributed antenna according to claim 1, wherein, The current extension structure includes a convex rib arranged on the conical surface of the reflection structure.

23. The omnidirectional indoor distributed antenna according to any one of claims 1 to 22, wherein, The omnidirectional indoor distributed antenna further includes an antenna cover, the antenna cover has an accommodation space, and the vertical polarization antenna and the horizontal polarization antenna are located in the accommodation space.

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