Omni-directional antenna and radio frequency module based on waveguide structure

Abstract

The application provides an omnidirectional antenna and a radio frequency module based on a waveguide structure, wherein antenna radiation is provided on both upper and lower sides of a PCB circuit board, so that the overall antenna radiation can cover an almost omnidirectional range, and the omnidirectional radiation characteristic of the antenna is realized. The omnidirectional beam coverage effect can be realized by a single antenna, and the combination with the PCB circuit board is good in stability, so that the integration of the module as a whole is increased, thereby the product is small in size, low in cost, regular in shape, and beneficial to installation; in addition, since electromagnetic waves are transmitted through a hollow waveguide transmission path in the application, the selection of the board material of the PCB circuit board does not need to consider the high-frequency characteristic requirement of the antenna, and a conventional PCB circuit board material can be used, which will further reduce the product cost, and make the module more economical and practical; finally, the directional diagram of the omnidirectional antenna has strong adjustability, and can be customized and adjusted according to the application scene requirement, so that the market applicability is strong.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of antennas, in particular relates to an omnidirectional antenna and radio frequency module based on waveguide structure, especially suitable for millimeter wave radar and base station system. BACKGROUND

[0002] An antenna is a device that converts guided electromagnetic waves into radiated electromagnetic waves, or vice versa, and plays an important role in wireless communication. The field of view (FOV) of an antenna is an important parameter of the directional coverage range of the antenna, which refers to the spatial angle range in which the antenna can effectively receive or transmit electromagnetic waves, and directly affects the detection, communication or imaging ability of the antenna. Taking radar as an example, only the targets within the FOV range of the antenna can be detected by the radar, while the targets outside the FOV range of the antenna may not be detected due to low signal strength. In the communication application scenario, only within the radiation coverage range of the base station antenna, the user can communicate with the base station, and outside the coverage range, the user cannot communicate with the base station.

[0003] At present, the FOV range of the antenna is limited, especially in base stations and millimeter wave radar products, it is impossible to achieve omnidirectional angle coverage, which brings problems to the actual application scenario, therefore, two or more antenna modules need to be used to achieve large angle coverage, but the product size of the multi-module antenna is large, the cost is high, and the multi-module antenna is generally of heterogeneous shape, which is not conducive to installation. SUMMARY

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present application is to provide an omnidirectional antenna and radio frequency module based on waveguide structure, which solves the problem of large product size, high cost and heterogeneous shape of the multi-module antenna in the prior art.

[0005] To achieve the above-mentioned purposes and other related purposes, the present application provides an omnidirectional antenna based on waveguide structure, which comprises a first metal block, a second metal block and a PCB circuit board, wherein,

[0006] The first metal block and the second metal block are respectively fixed on the metal layer on the opposite sides of the PCB circuit board;

[0007] The first metal block and the second metal block are respectively provided with at least one hollow channel on the side close to the PCB circuit board, and the hollow channel and the PCB circuit board form a hollow waveguide transmission path after being attached;

[0008] At least one metalized via is arranged on the PCB circuit board, and each of the metalized vias is in communication with the hollow channels adjacent to each other, and the metalized vias can transmit electromagnetic waves transmitted by the upstream hollow waveguide transmission path into the downstream hollow waveguide transmission path.

[0009] The first metal block and the second metal block are respectively provided with at least one radiation slot away from one side of the PCB circuit board.

[0010] Optionally, the radiation slot is arranged at the wave crest of the standing wave formed by the transmission of electromagnetic waves in the hollow waveguide transmission path.

[0011] Optionally, the first metal block is fixed on the PCB circuit board by screws or welding, and the second metal block is fixed on the PCB circuit board by screws or welding.

[0012] Optionally, the hollow waveguide transmission path transmits electromagnetic waves in TE 10 mode.

[0013] Optionally, a plurality of radiation slots are arranged on the first metal block, and all the radiation slots are arranged in an array; a plurality of radiation slots are arranged on the second metal block, and all the radiation slots are arranged in an array.

[0014] Optionally, the metalized via is arranged as a waveguide hole to transmit electromagnetic waves by waveguide transmission; or the metalized via is arranged as a coupling radiation hole to transmit electromagnetic waves by coupling transmission.

[0015] Optionally, a longitudinal waveguide metal block is added to the hollow waveguide transmission path passing through the PCB circuit board to prolong the length of the hollow waveguide transmission path.

[0016] The application also provides a radio frequency module, which comprises the waveguide structure-based omnidirectional antenna and the chip package according to any one of the above embodiments; and the chip package is electrically connected to the PCB circuit board of the waveguide structure-based omnidirectional antenna to transmit radio frequency signals into the hollow waveguide transmission path of the waveguide structure-based omnidirectional antenna.

[0017] Optionally, the chip package is a LoP chip, the LoP chip has a radiation port, the radiation port directly transmits radio frequency signals into the hollow waveguide transmission path through the waveguide transmission hole arranged on the PCB circuit board; or the radio frequency signals fed out by the chip package are sequentially transmitted into the hollow waveguide transmission path through the chip package pin, the transmission line and the mode conversion structure.

[0018] Optionally, the radio frequency module is applicable in a radar system or a base station system.

[0019] As described above, the omnidirectional antenna based on waveguide structure and the radio frequency module of the present application, by fixing the metal block on the upper and lower surfaces of the PCB circuit board, and setting the hollow channel in the metal block, to form the hollow waveguide transmission path after combining with the PCB circuit board, and the terminal of the hollow waveguide transmission path forms a short circuit (i.e. closed) state, so that the electromagnetic wave will form a standing wave in the hollow waveguide transmission path, at this time based on the radiation principle of the slot antenna, the radiation opening is set at the appropriate position of the outer surface of the metal block, the electromagnetic wave will produce antenna radiation through the radiation opening, since the hollow waveguide transmission path and the metal block are on the upper and lower sides of the PCB circuit board, the radiation slot is set on the metal block on the upper and lower sides of the PCB circuit board, and the antenna radiation is on the upper and lower sides of the PCB circuit board, so that the overall antenna radiation can cover almost the entire range, realizing the omnidirectional radiation characteristic of the antenna. The omnidirectional antenna of the present application can realize the effect of omnidirectional beam coverage by a single antenna, and has good stability in combination with the PCB circuit board, so that the integration of the module as a whole is increased, thereby the product size is small, the cost is low, and the product shape is regular, which is beneficial to installation; in addition, since the electromagnetic wave is transmitted through the hollow waveguide transmission path in the present application, the selection of the board material of the PCB circuit board does not need to consider the high frequency characteristic requirement of the antenna, and the conventional PCB circuit board material can be used, which will further reduce the product cost, making the module more economical and practical; finally, the directional diagram of the omnidirectional antenna of the present application has strong adjustability, which can be customized and adjusted according to the application scene requirement, and has strong market applicability. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 , Figure 2 , Figures 8-10 and Figure 12 shows the cross-sectional view of several examples of the omnidirectional antenna based on waveguide structure of the present application.

[0021] Figure 3 shows the cross-sectional view of one example of the first metal block in the omnidirectional antenna based on waveguide structure of the present application.

[0022] Figure 4 shows the cross-sectional view of one example of the second metal block in the omnidirectional antenna based on waveguide structure of the present application.

[0023] Figure 5 shows the top view of one example of the first metal block in the omnidirectional antenna based on waveguide structure of the present application.

[0024] Figure 6 shows the top view of another example of the first metal block in the omnidirectional antenna based on waveguide structure of the present application.

[0025] Figure 7 The image shown is a top view of an example PCB circuit board in an omnidirectional antenna based on a waveguide structure according to the present invention.

[0026] Figure 11 Displayed as Figure 10 A top view of an example of the first metal block in an omnidirectional antenna based on a waveguide structure.

[0027] Figure 13 and Figure 14 Cross-sectional views are shown for two examples of the radio frequency module of the present invention.

[0028] Component designation explanation

[0029] 10 First metal block 100 Hollow channel 101 Hollow waveguide transmission path 102 Gap 11 Second metal block 12 PCB circuit board 120 Metalized via 13 Radiating slot 130 Radiating slot region 14 Chip package 140 LOP chip 141 Waveguide transmission hole 142 Chip package pin 143 Transmission line 15 Longitudinal waveguide metal block 16 Device Detailed Implementation

[0030] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0031] In the description of the embodiments of this application, "at least one" means one or more, "multiple" means two or more, and "multiple rows" means two or more rows, unless otherwise explicitly specified.

[0032] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly indicating the number, specific order, or primary and secondary relationship of the indicated technical features.

[0033] In the description of the embodiments of this application, the term "and / or" is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists, A and B exist simultaneously, and B exists.

[0034] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application. For example, if the devices or elements in the drawings are inverted, the elements described as "below" or "under" or "lower" or "bottom" of other elements or features will be oriented "above" or "top" of the other elements or features. Therefore, the term "below" can encompass both upward and downward orientations depending on the context in which the term is used, which will be apparent to those skilled in the art. The materials can be oriented in other ways (e.g., rotated 90 degrees, inverted, flipped), and the spatially relative descriptions used herein can be interpreted accordingly.

[0035] Referring to Figures 1-14 , it should be noted that the drawings provided in the embodiments only schematically illustrate the basic concepts of the present application, and only show the components related to the present application in the drawings, not drawn according to the number, shape and size of the components when actually implemented. The actual implementation of each component can be a random change, and the component layout pattern can be more complex.

[0036] As shown in Figures 1-7 , the present embodiment provides an omnidirectional antenna based on a waveguide structure, which comprises a first metal block 10, a second metal block 11 and a PCB circuit board 12; wherein,

[0037] The first metal block 10 and the second metal block 11 are respectively fixed on the metal layer on the opposite two sides of the PCB circuit board 11;

[0038] As shown in Figure 1 , Figure 3 , and Figure 4 , the first metal block 10 and the second metal block 11 are respectively provided with at least one hollow channel 100 close to one side of the PCB circuit board 11, and the hollow channel 100 forms a hollow waveguide transmission path 101 after being attached to the PCB circuit board 11;

[0039] As shown in Figure 1 , and Figure 7As shown, at least one metallized via 120 is provided on the PCB circuit board 12, and each of the metallized vias 120 is in communication with the hollow channels 100 above and below, and the metallized vias 120 can transmit electromagnetic waves (such as Figure 1 the arrowhead represents the transmission path of electromagnetic waves) transmitted by the hollow waveguide transmission path 101 upstream to the hollow waveguide transmission path 101 downstream;

[0040] As shown in Figure 1 and Figure 2 , at least one radiation slot 13 is provided on the side of the first metal block 10 and the second metal block 11 away from the PCB circuit board 12, respectively. It should be noted here that Figure 1 and Figure 2 are both cross-sectional views of the omnidirectional antenna based on the waveguide structure, the difference is that Figure 1 shows the radiation slot area 130, and the radiation slot 13 is not shown, while Figure 2 shows the radiation slot 13, and in Figures 8-10 , Figures 12-14 only the radiation slot area 130 is shown, and the radiation slot 13 is not shown, which is for the convenience of understanding. In actual use, the radiation slot area 130 will form the radiation slot 13.

[0041] The omnidirectional antenna based on the waveguide structure of the embodiment forms a hollow waveguide transmission path by fixing the metal blocks on the upper and lower surfaces of the PCB circuit board and setting hollow channels in the metal blocks after being combined with the PCB circuit board, and the terminal of the hollow waveguide transmission path forms a short-circuit (i.e. closed) state, so that the electromagnetic wave forms a standing wave in the hollow waveguide transmission path. At this time, based on the radiation principle of the slot antenna, the radiation opening is set at a suitable position on the outer surface of the metal block, and the electromagnetic wave will produce antenna radiation through the radiation opening. Since the hollow waveguide transmission path and the metal block are on the upper and lower surfaces of the PCB circuit board, the radiation slots are set on the metal blocks on the upper and lower surfaces of the PCB circuit board, and the antenna radiation is on the upper and lower surfaces of the PCB circuit board, so that the overall antenna radiation can cover an almost omnidirectional range, realizing the omnidirectional radiation characteristic of the antenna. The omnidirectional antenna of the embodiment can realize the effect of omnidirectional beam coverage by a single antenna, and has good stability in combination with the PCB circuit board, so that the integration of the module as a whole is increased, thereby realizing small product size, low cost, and regular product shape, which is beneficial for installation. In addition, since the embodiment transmits electromagnetic waves through the hollow waveguide transmission path, the selection of the board material of the PCB circuit board does not need to consider the high-frequency characteristic requirement of the antenna, and a conventional PCB circuit board material can be used, which will further reduce the product cost and make the module more economical and practical. Finally, the pattern of the omnidirectional antenna of the embodiment has strong adjustability, and can be customized and adjusted according to the application scene requirement, so it has strong market applicability.

[0042] As an example, the electromagnetic wave forms a standing wave in the hollow waveguide transmission path 101, so the radiation opening 13 on the first metal block 10 and the second metal block 11 is preferably set at the wave crest of the standing wave to achieve the best radiation efficiency. Of course, the setting position of the radiation opening 13 in actuality can also have a certain deviation from the wave crest of the standing wave, which may be the influence of process precision or actual design requirement, as long as the radiation efficiency requirement is met.

[0043] As an example, the first metal block 10 and the second metal block 11 can be fixed with the PCB circuit board 12 by existing conventional fixing methods. For example, screw fixing, welding fixing, etc. In addition, the fixing methods between the first metal block 10 and the second metal block 11 and the PCB circuit board 12 can be the same or different. For example, the first metal block 10 and the PCB circuit board 12 are fixed by screwing, while the second metal block 11 and the PCB circuit board 12 are fixed by welding, or both are fixed by screwing. The specific selection is based on actual needs. Further, an electromagnetic bandgap structure can also be provided around the relevant structure, which can further reduce the fixing requirements between the first metal block 10 and / or the second metal block 11 and the PCB circuit board 12.

[0044] As an example, the electromagnetic wave mode transmitted by the hollow waveguide transmission path is generally selected from the electromagnetic wave modes transmitted by the slot antenna, such as TE 10 mode, high-order mode, etc. In this embodiment, the TE 10 mode is preferred.

[0045] The shapes of the first metal block 10 and the second metal block 11 can be the same or different. In addition, the first metal block 10 and the second metal block 11 can be symmetrically arranged on the upper and lower sides of the PCB circuit board 12 or asymmetrically arranged. The specific arrangement is based on actual needs.

[0046] The number of radiation slots 13 can be one or more. According to the radiation principle of the antenna, the radiation slots 13 are arranged in the area outside the center line of the corresponding metal block in the width direction. Here, the width direction refers to the X direction in the drawing, and the corresponding length direction refers to the Y direction in the drawing. For example, Figure 5 In this embodiment, two hollow channels 100 are arranged on the first metal block 10, and one radiation slot 13 is arranged in each corresponding area of the hollow channels 100. Figure 6 In this embodiment, two hollow channels 100 are arranged on the first metal block 10, and multiple radiation slots 13 are arranged in each corresponding area of the hollow channels 100, and the multiple radiation slots 13 are arranged in an array. Another case is that one hollow channel 100 is arranged on the first metal block 10 or the second metal block 11, and one radiation slot 13 is arranged in the corresponding area of the hollow channel 100. Of course, the above is only an example, and the number of radiation slots 13 and whether to arrange in an array when multiple radiation slots 13 are arranged are based on actual needs. As long as the radiation principle of the slot antenna is met, it is acceptable.

[0047] For example, Figure 8As shown, as an example, when the device 16 is formed on the surface of the PCB circuit board 12, such as a circuit component or a required transmission line, etc., the gap 102 can be set on the metal block of the corresponding contact surface to avoid affecting the link and communication between the chip and the device, as shown in Figure 8 The device 16 is arranged on the side of the PCB circuit board 12 facing the second metal block 11, so the corresponding position of the second metal block 11 is hollowed out to form a gap 102 to isolate the device 16 for avoidance.

[0048] The metalized via 120 can be achieved by setting a through hole in the PCB circuit board 12 and forming a metal conductive layer on the inner wall surface of the through hole to achieve the metalization of the through hole. In addition, the metalized via 120 can transmit the electromagnetic wave transmitted by the upstream hollow waveguide transmission path 101 into the downstream hollow waveguide transmission path 101, and the transmission mode can be waveguide transmission or coupling transmission. As shown in Figure 8 The metalized via 120 is used to transmit the electromagnetic wave transmitted by the upstream hollow waveguide transmission path 101 into the downstream hollow waveguide transmission path 101 in a waveguide transmission mode, and the size of the metalized via 120 meets the standard waveguide hole size of the transmitted electromagnetic wave frequency, which is known in the art, and is set according to the actual situation. As shown in Figure 12 The metalized via 120 is used to transmit the electromagnetic wave transmitted by the upstream hollow waveguide transmission path 101 into the downstream hollow waveguide transmission path 101 in a waveguide transmission mode, and the size of the metalized via 120 meets the standard waveguide hole size of the transmitted electromagnetic wave frequency, which is known in the art, and is set according to the actual situation. As shown in Figure 12 The metalized via 120 is set as a slot hole for slot radiation, so that the electromagnetic wave transmitted by the upstream hollow waveguide transmission path 101 is radiated and transmitted into the downstream hollow waveguide transmission path 101 through the principle of slot radiation.

[0049] As shown in Figure 10 As an example, a longitudinal waveguide metal block 15 can also be added to the hollow waveguide transmission path 101 passing through the PCB circuit board 12 to lengthen the length of the hollow waveguide transmission path 101. Through this longitudinal waveguide metal block 15, the hollow waveguide transmission path 101 in the corresponding metal block can even be bent out of a non-linear curve path in the plane (such as Figure 11 the XY plane in Figure 11 The curve path can adjust the spacing between the radiation slots 13 to eliminate the sidelobe of the Y direction radiation pattern.

[0050] As an example, the transmission path of the electromagnetic wave in the hollow waveguide transmission path 101 can also be set in a spatially folded form, as shown in Figure 9As shown, a hollow channel 100 is arranged on the first metal block 10 and the second metal block 11 respectively, and the upper and lower hollow waveguide transmission paths 101 are connected through a metalized via hole 120, so that the electromagnetic wave from the vertical one side hollow waveguide transmission path 101 enters the vertical other side hollow waveguide transmission path 101 through the metalized via hole 120. The omnidirectional antenna formed in this way has a smaller size.

[0051] As shown in the Figure 13 and Figure 14 based on the waveguide structure omnidirectional antenna disclosed in the embodiment, the embodiment further provides a radio frequency module, which comprises the waveguide structure omnidirectional antenna disclosed in the embodiment and a chip package 14; wherein the chip package 14 is electrically connected to the PCB circuit board 12 of the waveguide structure omnidirectional antenna to transmit radio frequency signals into the hollow waveguide transmission path 101 of the waveguide structure omnidirectional antenna.

[0052] In practice, the feeding mode of the antenna is adjusted according to the form of the chip package 14. As shown in the Figure 13 , the chip package 14 is a LoP (Launcher on Package) chip 140, and the encapsulated radiation port thereof is directly connected to the waveguide antenna feed point. In the Figure 13 , the encapsulated radiation port of the LOP chip 140 directly faces the interface of the hollow waveguide transmission path 101, and a very short waveguide transmission hole 141 is formed on the PCB circuit board 12 to connect the encapsulated radiation port of the LOP chip 140 and the interface of the hollow waveguide transmission path 101, so that the electromagnetic wave fed out by the LOP chip 140 is directly waveguide transmitted into the hollow waveguide transmission path 101. As shown in the Figure 14 , the radio frequency signals fed out by the chip package 14 are transmitted into the hollow waveguide transmission path 101 through the chip package pin 142, the transmission line 143 and the mode conversion structure (not shown in the figure) in sequence.

[0053] The radio frequency module of the embodiment can be actively and effectively applied in a radar system or a base station system. However, it is not limited thereto, and other electronic systems with high requirements for antenna radiation angle can also be applicable.

[0054] In summary, the application provides an omnidirectional antenna and radio frequency module based on waveguide structure, by fixing metal blocks on the upper and lower surfaces of the PCB circuit board, and setting hollow channels in the metal blocks, to form hollow waveguide transmission paths after combining with the PCB circuit board, and the terminals of the hollow waveguide transmission paths form a short circuit (i.e. closed) state, so that the electromagnetic waves form a standing wave in the hollow waveguide transmission path, at this time based on the radiation principle of the slot antenna, set the radiation opening at a suitable position on the outer surface of the metal block, electromagnetic waves will produce antenna radiation through the radiation opening, because the hollow waveguide transmission path and the metal block are on the upper and lower surfaces of the PCB circuit board, so the metal blocks on the upper and lower surfaces of the PCB circuit board are provided with radiation slots, and the antenna radiation is on the upper and lower surfaces of the PCB circuit board, so that the overall antenna radiation can cover an almost omnidirectional range, realizing the omnidirectional radiation characteristic of the antenna. The omnidirectional antenna of the application can realize the effect of omnidirectional beam coverage by a single antenna, and has good stability in combination with the PCB circuit board, so that the integration of the module as a whole is increased, thereby the product size is small, the cost is low, and the product shape is regular, which is beneficial to installation; in addition, because the application transmits electromagnetic waves through the hollow waveguide transmission path, the selection of the board material of the PCB circuit board does not need to consider the high frequency characteristic requirement of the antenna, and the conventional PCB circuit board material can be used, which will further reduce the product cost, making the module more economical and practical; finally, the directional diagram of the omnidirectional antenna of the application has strong adjustability, which can be customized and adjusted according to the application scene requirement, and has strong market applicability. Therefore, the application effectively overcomes the various shortcomings in the prior art and has high industrial utilization value.

[0055] The above embodiments only exemplarily illustrate the principles and effects of the application, and are not used to limit the application. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the application. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical idea disclosed by the application should be covered by the claims of the application.

Claims

1. A waveguide structure based omni antenna, characterized by, The omnidirectional antenna comprises a first metal block, a second metal block and a PCB circuit board, wherein The first metal block and the second metal block are respectively fixed on the metal layer of the opposite two sides of the PCB circuit board; The first metal block and the second metal block are respectively provided with at least one hollow channel on the side close to the PCB circuit board, and the hollow channel and the PCB circuit board are pasted to form a hollow waveguide transmission path; The PCB circuit board is provided with at least one metallized via, and each metallized via is connected with the adjacent hollow channels above and below, and the metallized via can transmit the electromagnetic wave transmitted by the upstream hollow waveguide transmission path into the downstream hollow waveguide transmission path; The first metal block and the second metal block are respectively provided with at least one radiation slot on the side away from the PCB circuit board.

2. The omni-directional antenna based on waveguide structure according to claim 1, characterized in that: The radiation slot is arranged at the wave peak of the standing wave formed by the transmission of electromagnetic wave in the hollow waveguide transmission path.

3. The waveguide structure based omni antenna according to claim 1, characterized in that: The first metal block is fixed on the PCB circuit board by screwing or welding, and the second metal block is fixed on the PCB circuit board by screwing or welding.

4. The waveguide structure based omni antenna of claim 1, wherein: The hollow waveguide transmission path transmits electromagnetic waves of TE 10 mode.

5. The waveguide structure based omni antenna of claim 1, wherein: The first metal block is provided with a plurality of radiation slots, and all the radiation slots are arranged in an array; the second metal block is provided with a plurality of radiation slots, and all the radiation slots are arranged in an array.

6. The waveguide structure based omni antenna of claim 1, wherein: The metallized via is arranged as a waveguide hole to transmit electromagnetic wave by waveguide transmission mode; or the metallized via is arranged as a coupling radiation hole to transmit electromagnetic wave by coupling transmission mode.

7. The waveguide structure based omni antenna according to claim 1, characterized by: A longitudinal waveguide metal block is added in the hollow waveguide transmission path through the PCB circuit board to prolong the length of the hollow waveguide transmission path.

8. A radio frequency module, characterized by The radio frequency module comprises the omnidirectional antenna based on waveguide structure and a chip package body according to any one of claims 1-7, wherein the chip package body is electrically connected to the PCB circuit board of the omnidirectional antenna based on waveguide structure to transmit radio frequency signal into the hollow waveguide transmission path of the omnidirectional antenna based on waveguide structure.

9. The radio module of claim 8, wherein: The chip package body is a LoP chip, the LoP chip has a radiation port, the radiation port directly transmits radio frequency signal into the hollow waveguide transmission path through the waveguide transmission hole arranged on the PCB circuit board; or the radio frequency signal fed out by the chip package body is transmitted into the hollow waveguide transmission path through the chip package pin, the transmission line and the mode conversion structure in sequence.

10. The radio module of claim 8, wherein: The radio frequency module is suitable for radar system or base station system.

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