Antenna and wireless communication device

Abstract

The utility model relates to an antenna and a wireless communication device. The antenna includes: an antenna substrate; the first antenna is of a monopole radiation structure, the second antenna is of a dipole radiation structure, and the first antenna and the second antenna are arranged on the antenna substrate in the length direction of the antenna substrate; wherein the first antenna is used for omni-directionally radiating a signal of a first frequency band, the second antenna is used for omni-directionally radiating a signal of a second frequency band, and the frequency range of the first frequency band is at least partially different from that of the second frequency band; the first antenna has a horizontal polarization direction and a vertical polarization direction, and the second antenna has a vertical polarization direction, so that the isolation degree of the first antenna and the second antenna is greater than an isolation degree threshold value. The antenna can support multi-band broadband, and the isolation between the first antenna and the second antenna and the antenna efficiency are ensured.

Description

Technical Field

[0001] This application relates to the field of antenna technology, and in particular to an antenna and a wireless communication device. Background Technology

[0002] For wireless communication devices, antenna design determines the reliability and efficiency of wireless signal transmission. Therefore, antenna design is one of the core aspects of wireless communication devices.

[0003] With the miniaturization of devices, the space available for antenna placement in wireless communication devices is becoming increasingly limited, leading to a trend towards smaller antenna designs. For example, consider an image transmission module. This module uses wireless communication technology to transmit video data captured by a camera to a monitoring center or other backend devices, enabling long-distance video data transmission. The image transmission module includes a vertical pole sleeve, within which the antenna is housed. The space for installing the antenna within this pole sleeve is only on the order of centimeters.

[0004] Therefore, ensuring that the designed antenna meets the antenna transmission performance requirements in this scenario is a challenge that needs to be addressed. Utility Model Content

[0005] In a first aspect, embodiments of this application provide an antenna, including:

[0006] Antenna substrate;

[0007] The first antenna has a monopole radiating structure.

[0008] And the second antenna, which is a dipole radiation structure, and the first antenna and the second antenna are arranged on the antenna substrate along the length of the antenna substrate;

[0009] The first antenna is used to omnidirectionally radiate signals in the first frequency band, and the second antenna is used to omnidirectionally radiate signals in the second frequency band. The frequency ranges of the first frequency band and the frequency ranges of the second frequency band are at least partially different. The first antenna has a horizontal polarization direction and a vertical polarization direction, and the second antenna has a vertical polarization direction, so that the isolation between the first antenna and the second antenna is greater than the isolation threshold.

[0010] In one embodiment, the first antenna includes:

[0011] First radiator;

[0012] floor;

[0013] The first feeding structure is disposed between the first radiator and the ground, and the first radiator and the ground form a monopole radiation structure.

[0014] In one embodiment, the first radiator includes a first radiating part, a second radiating part, and a third radiating part;

[0015] The first radiating part and the third radiating part are arranged along the length direction of the antenna substrate; the second radiating part is arranged along the width direction of the antenna substrate.

[0016] The first end of the first radiating part is a free end, the second end of the first radiating part is connected to the first end of the second radiating part, the second end of the second radiating part is connected to the first end of the third radiating part, and the second end of the third radiating part is connected to the first feeding structure.

[0017] In one embodiment, the height of the first radiating element ranges from 18.15 mm to 54.45 mm.

[0018] In one embodiment, the height of the first radiating part is 36.3 mm.

[0019] In one embodiment, the floor includes a first floor and a second floor, both of which are disposed along the length direction of the antenna substrate;

[0020] The first end of the first ground plane is a free end, and the second end of the first ground plane includes a first bent portion disposed along the width direction of the antenna substrate. The first bent portion is connected to the first feeding structure.

[0021] The second floor includes a first opening, and a first bend is connected to one side of the first opening in the second floor so that the first floor and the second floor form a second opening. The opening direction of the first opening is opposite to the opening direction of the second opening, and the other side of the first opening in the second floor is a free end.

[0022] In one embodiment, the height of the first floor ranges from 15.85 mm to 47.55 mm; the height of the second floor ranges from 19.25 mm to 57.75 mm; and the opening height of the first opening ranges from 11.5 mm to 34.5 mm.

[0023] In one embodiment, the height of the first floor is 31.7 mm, the height of the second floor is 38.5 mm, and the opening height of the first opening is 23 mm.

[0024] In one embodiment, the second antenna includes:

[0025] Second radiator;

[0026] Third radiator;

[0027] The second feeding structure is located between the second radiator and the third radiator, and the second radiator and the third radiator form a dipole radiation structure.

[0028] In one embodiment, the second radiator includes a fourth radiating part, a fifth radiating part, a first bandpass filter radiating part, and a sixth radiating part;

[0029] The fourth and fifth radiating parts are arranged along the length direction of the antenna substrate, and the sixth radiating part is arranged along the width direction of the antenna substrate.

[0030] The first end of the fourth radiating part is a free end, and the second end of the fourth radiating part includes a second bent part arranged along the width direction of the antenna substrate. The second bent part is connected to the second feeding structure and is also connected to the first end of the fifth radiating part. The first end of the sixth radiating part is a free end, and the first bandpass filter radiating part is connected between the second end of the fifth radiating part and the second end of the sixth radiating part.

[0031] In one embodiment, the second radiator includes a cross-shaped radiating structure and a serpentine radiating structure arranged in parallel.

[0032] In one embodiment, the second bend is stepped.

[0033] In one embodiment, the height of the fifth radiating element ranges from 5.675 mm to 17.025 mm, the height of the first bandpass filter radiating element ranges from 1.6 mm to 4.8 mm, and the width of the first bandpass filter radiating element ranges from 2.675 mm to 8.025 mm.

[0034] In one embodiment, the height of the fifth radiating element is 11.35 mm, the height of the first bandpass filter radiating element is 3.2 mm, and the width of the first bandpass filter radiating element is 5.35 mm.

[0035] In one embodiment, the third radiator includes a seventh radiating part, an eighth radiating part, a second bandpass filter radiating part, and a ninth radiating part;

[0036] The seventh and eighth radiating parts are arranged along the length direction of the antenna substrate, and the ninth radiating part is arranged along the width direction of the antenna substrate.

[0037] The first end of the seventh radiating part is a free end, the second end of the seventh radiating part is connected to the second feeding structure, and a third bending part is also provided along the width direction of the antenna substrate between the first end of the seventh radiating part and the second end of the seventh radiating part. The third bending part is connected to the first end of the eighth radiating part, the first end of the ninth radiating part is a free end, and the second bandpass filter radiating part is connected between the second end of the eighth radiating part and the second end of the ninth radiating part.

[0038] In one embodiment, the third radiator includes a cross-shaped radiating structure and a serpentine radiating structure arranged in parallel.

[0039] In one embodiment, the height between the first end of the seventh radiating part and the second end of the seventh radiating part ranges from 6.86 mm to 20.58 mm, the height of the eighth radiating part ranges from 6.485 mm to 19.455 mm, the width of the ninth radiating part ranges from 3.7 mm to 11.1 mm, the height of the second bandpass filter radiating part ranges from 1.6 mm to 4.8 mm, and the width of the second bandpass filter radiating part ranges from 2.675 mm to 8.025 mm.

[0040] In one embodiment, the height between the first end of the seventh radiating part and the second end of the seventh radiating part is 13.72 mm, the height of the eighth radiating part is 12.97 mm, the width of the ninth radiating part is 7.4 mm, the height of the second bandpass filter radiating part is 3.2 mm, and the width of the second bandpass filter radiating part is 5.35 mm.

[0041] In one embodiment, the first frequency band includes a Sub1GHz band and a 5GHz band; the second frequency band includes a 2.4GHz band and a 5GHz band.

[0042] Secondly, embodiments of this application provide a wireless communication device, which is provided with an antenna as described in any of the first aspects above.

[0043] In one embodiment, the wireless communication device includes an image transmission module, which includes a communication module and at least one vertical pole sleeve. An antenna as described in any of the first aspects above is disposed within the vertical pole sleeve, and the communication module is connected to the antenna.

[0044] The aforementioned antenna and wireless communication device include an antenna substrate, a first antenna, and a second antenna. The first antenna has a monopole radiating structure, and the second antenna has a dipole radiating structure. The first antenna and the second antenna are disposed on the antenna substrate along its length. The first antenna is used to omnidirectionally radiate signals in a first frequency band, and the second antenna is used to omnidirectionally radiate signals in a second frequency band. The frequency ranges of the first and second frequency bands are at least partially different. The first frequency band may include, for example, a Sub-1GHz band and a 5GHz band, and the second frequency band may include, for example, a 2.4GHz band and a 5GHz band, etc. Thus, the first antenna and the second antenna are omnidirectional antennas. It can support multi-band wideband. In addition, in the embodiments of this application, the first antenna has a horizontal polarization direction and a vertical polarization direction, and the second antenna has a vertical polarization direction. That is, the first antenna has a polarization direction different from that of the second antenna. The greater the difference in polarization direction between the first antenna and the second antenna, the better their isolation. This can make the isolation between the first antenna and the second antenna greater than the isolation threshold, thereby ensuring the isolation between the first antenna and the second antenna, and thus ensuring the antenna efficiency of the first antenna and the second antenna. The multi-band wideband omnidirectional antenna provided in the embodiments of this application can guarantee the antenna isolation and antenna efficiency, so that the antenna meets the antenna transmission performance requirements. Attached Figure Description

[0045] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0046] Figure 1 A schematic diagram of an antenna provided in one embodiment;

[0047] Figure 2 This is a schematic diagram of an image transmission module and a surveillance camera provided in one embodiment;

[0048] Figure 3 A schematic diagram of a first antenna provided in one embodiment;

[0049] Figure 4 A schematic diagram of the second antenna provided in one embodiment;

[0050] Figure 5 A schematic diagram of an antenna provided for another embodiment;

[0051] Figure 6 The radiation pattern of the antenna provided in one embodiment is when the antenna is operating at 900MHz;

[0052] Figure 7 The radiation pattern of the antenna when it operates at 2.45 GHz, as provided in one embodiment;

[0053] Figure 8 The radiation pattern of the antenna when it operates at 5.5 GHz, as provided in one embodiment;

[0054] Figure 9 An S-parameter diagram of a first antenna provided in one embodiment;

[0055] Figure 10 S-parameter diagram of a second antenna provided for one embodiment;

[0056] Figure 11 S-parameter diagrams of a first antenna and a second antenna provided in one embodiment;

[0057] Figure 12 A schematic diagram of the radiation efficiency of a first antenna provided in one embodiment;

[0058] Figure 13 A schematic diagram of the radiation efficiency of a second antenna provided for one embodiment.

[0059] Explanation of reference numerals in the attached figures:

[0060] Antenna substrate-101; First antenna-102; First feed structure-1021; First radiator-1022; Second radiator-1023; Third radiator-1024; First ground plane-1025; Second ground plane-1026; Second antenna-103; Second feed structure-1031; Fourth radiator-1032; Fifth radiator-1033; First bandpass filter radiator-1034; Sixth radiator-1035; Seventh radiator-1036; Eighth radiator-1037; Second bandpass filter radiator-1038; Ninth radiator-1039; Communication module-20; Vertical pole sleeve-30; Surveillance camera-40. Detailed Implementation

[0061] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0062] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0063] It is understood that the terms "first," "second," etc., used herein may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, without departing from the scope of this application, a first resistor may be referred to as a second resistor, and similarly, a second resistor may be referred to as a first resistor. Both the first resistor and the second resistor are resistors, but they are not the same resistor.

[0064] It is understood that the term "connection" in the following embodiments should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have electrical signal or data transmission with each other.

[0065] It is understandable that "at least one" refers to one or more, and "multiple" refers to two or more. "At least a part of an element" refers to part or all of an element.

[0066] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising / including” or “having,” etc., specify the presence of the stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. Meanwhile, the term “and / or” as used in this specification includes any and all combinations of the associated listed items.

[0067] For wireless communication devices, antenna design determines the reliability and efficiency of wireless signal transmission. Therefore, antenna design is one of the core aspects of wireless communication devices.

[0068] With the miniaturization of devices, the space available for antenna placement in wireless communication devices is becoming increasingly limited, leading to a trend towards smaller antenna designs. Taking image transmission modules (or image transmission modules, etc.) as an example, these modules can use wireless communication technology to transmit video data captured by cameras to monitoring centers or other backend devices, enabling long-distance video data transmission.

[0069] Antenna design is a crucial aspect of image transmission module design. Conventional antenna designs include dipole antennas, inverted-F antennas (IFA), and monopole antennas. Through research and analysis, the inventors of this application discovered that, because the antennas used in image transmission modules need to be designed within a vertical support structure, which is relatively small, and the antennas need to support multiple wireless communication bands such as Sub-1GHz, 2.4GHz, and 5GHz, conventional dipole antennas are too large to match the size of the support structure and offer insufficient isolation, failing to meet isolation standards. Conventional inverted-F antennas lack omnidirectional coverage, failing to meet the antenna coverage requirements for image transmission. Conventional monopole antennas, limited by the size of the support structure, have insufficient ground plane, resulting in antenna efficiency that cannot meet image transmission requirements.

[0070] Therefore, for miniaturized wireless communication devices such as image transmission modules, designing an omnidirectional antenna that supports multiple frequency bands and wide bandwidth within a limited antenna arrangement space, while ensuring that the antenna's isolation and efficiency meet the antenna transmission performance requirements, is an urgent problem to be solved.

[0071] Therefore, embodiments of this application provide an antenna and a wireless communication device.

[0072] See Figure 1 , Figure 1 A schematic diagram of an antenna in one embodiment of this application is shown. The antenna is used in a wireless communication device, which may be an image transmission module, a wireless router, a wireless camera, a wireless doorbell, or other wireless devices.

[0073] Taking an image transmission module as an example, the image transmission module includes a communication module and one or more vertical pole sleeves. The antenna provided in this embodiment can be installed inside each vertical pole sleeve. The communication module has routing functions, and transmits the video data captured by the camera to the monitoring center or other backend equipment through the antenna installed in the vertical pole sleeve. See also Figure 2 , Figure 2 This is a schematic diagram of an exemplary image transmission module and a surveillance camera 40. Figure 2 The image transmission module shown includes a communication module 20 and two vertical pole sleeves 30, which are disposed on both sides of the image transmission module. Each vertical pole sleeve 30 contains an antenna provided in this embodiment of the application. Figure 2 (Not shown).

[0074] The antenna provided in this application includes an antenna substrate 101, a first antenna 102 and a second antenna 103. The first antenna 102 is a monopole radiating structure and the second antenna 103 is a dipole radiating structure. The first antenna 102 and the second antenna 103 are disposed on the antenna substrate 101 along the length direction of the antenna substrate 101.

[0075] In this embodiment, the antenna substrate 101 has a certain length and width, and the length of the antenna substrate 101 can be greater than the width of the antenna substrate 101. The first antenna 102 and the second antenna 103 are arranged along the length direction of the antenna substrate 101, which means that the length direction of the first antenna 102 and the length direction of the second antenna 103 are both consistent with the length direction of the antenna substrate 101.

[0076] For example, the first antenna 102 is disposed at the first end of the antenna substrate 101 along the length direction of the antenna substrate 101, and the second antenna 103 is disposed at the second end of the antenna substrate 101 along the length direction of the antenna substrate 101.

[0077] In one possible implementation, the first antenna 102 and the second antenna 103 are disposed on the same side surface of the antenna substrate 101. The first antenna 102 is disposed at a first end of that side surface of the antenna substrate 101, and the second antenna 103 is disposed at a second end of that side surface of the antenna substrate 101. The center lines of the first antenna 102 and the second antenna 103 may or may not overlap. For example... Figure 1 The centerline of the first antenna 102 shown does not overlap with the centerline of the second antenna 103.

[0078] In other possible implementations, the first antenna 102 and the second antenna 103 may also be disposed on different side surfaces of the antenna substrate 101, etc.

[0079] The following embodiments are all described with the first antenna 102 and the second antenna 103 disposed on the same side surface of the antenna substrate 101 as an example.

[0080] Continuing with the antenna used in the embodiments of this application Figure 2 Taking the image transmission module shown as an example, after the antenna substrate 101 is installed inside the vertical pole sleeve 30, the antenna substrate 101 is in an upright state during normal operation of the image transmission module. In this scenario, optionally, the first antenna 102 is located above the second antenna 103 (e.g., Figure 1 (As shown); Optionally, the second antenna 103 may also be located above the first antenna 102. The relative positions of the first antenna 102 and the second antenna 103 are not limited here. For ease of description, the following embodiments will all use... Figure 1 The example shown is of the first antenna 102 located above the second antenna 103.

[0081] Antenna substrate 101 is used to carry and support the first antenna 102 and the second antenna 103. The size of antenna substrate 101 is adapted to the size of vertical pole sleeve 30 so that antenna substrate 101 can be accommodated within vertical pole sleeve 30. In this embodiment, antenna substrate 101 may be a rectangular dielectric substrate, and the first antenna 102 and the second antenna 103 may be implemented by metal traces printed on antenna substrate 101.

[0082] For example, the height of the antenna substrate 101 can range from 63.65 mm to 190.95 mm, and the width of the antenna substrate 101 can range from 10 mm to 30 mm. For instance, the height of the antenna substrate 101 is 127.3 mm, and the width of the antenna substrate 101 is 20 mm. In other possible embodiments, the antenna substrate 101 may also have other size ranges, which are not specifically limited here.

[0083] In this embodiment, both the first antenna 102 and the second antenna 103 are omnidirectional antennas, satisfying antenna coverage requirements. For example, the first antenna 102 can be a monopole antenna, and the second antenna 103 can be a dipole antenna, etc. The first antenna 102 supports a first frequency band, and the second antenna 103 supports a second frequency band. The first antenna 102 is used to omnidirectionally radiate signals of the first frequency band, and the second antenna 103 is used to omnidirectionally radiate signals of the second frequency band.

[0084] The frequency ranges of the first frequency band and the second frequency band are at least partially different. For example, the frequency ranges of the first and second frequency bands may not overlap. For instance, the first frequency band may include a Sub-1GHz band, and the second frequency band may include a 2.4GHz band and a 5GHz band. In this case, the frequency ranges of the first and second frequency bands do not overlap. Alternatively, the frequency ranges of the first and second frequency bands may partially overlap. For example, in addition to supporting the Sub-1GHz band, the first antenna 102 may also excite higher-order modes through a specific structural design, such as supporting the 5GHz band. That is, the first frequency band includes the Sub-1GHz band and the 5GHz band, and the second frequency band includes the 2.4GHz band and the 5GHz band. In this case, the frequency ranges of the first and second frequency bands partially overlap. The first antenna 102 and the second antenna 103 in this embodiment can thus support multi-band and wideband signal radiation.

[0085] In this embodiment of the application, in order to improve the problem of poor antenna isolation caused by mutual coupling when multiple antennas are set on a small single antenna substrate 101, the first antenna 102 is designed to have a polarization direction different from that of the second antenna 103. This is because there is mutual coupling between antennas with the same polarization direction, and the difference in polarization direction is beneficial to improving the isolation between antennas. Therefore, this design can improve the isolation between the first antenna 102 and the second antenna 103, so that the isolation between the first antenna 102 and the second antenna 103 is greater than the isolation threshold. The isolation threshold can be, for example, 15dB. In other possible embodiments, the isolation threshold can also be other values, which are not specifically limited here. In addition, by improving the isolation between the first antenna 102 and the second antenna 103, the embodiments of this application can improve the mutual coupling phenomenon between the first antenna 102 and the second antenna 103, thereby improving the phenomenon that the first antenna 102 and the second antenna 103 are difficult to exhibit ultimate omnidirectional coverage characteristics due to the mutual coupling phenomenon, ensuring the omnidirectional coverage of the first antenna 102 and the second antenna 103. When used in an image transmission module, it can meet the requirement of the image transmission module that the antenna has ultimate omnidirectional coverage characteristics.

[0086] In one possible implementation, continuing with the example of the first antenna 102 being a monopole antenna and the second antenna 103 being a dipole antenna, the antennas in this embodiment are disposed within a vertical pole sleeve 30, which is vertically positioned. The first antenna 102 and the second antenna 103 have a vertical polarization direction. This embodiment can also construct a horizontal polarization component by increasing the horizontal current path in the first antenna 102, thus giving the first antenna 102 both a horizontal and a vertical polarization direction. This increases the difference in polarization direction between the first antenna 102 and the second antenna 103, improving the isolation between them. As mentioned above, the improved isolation between the first antenna 102 and the second antenna 103 can mitigate the mutual coupling phenomenon between them. Therefore, it can reduce the probability that some of the energy radiated by one antenna is absorbed by the other antenna, improving the antenna efficiency of the first antenna 102 and the second antenna 103.

[0087] The first antenna 102 and the second antenna 103 will be described below.

[0088] First, let's introduce the first antenna, 102.

[0089] In this embodiment of the application, the first antenna 102 includes a first radiator, a ground plane, and a first feeding structure. The first feeding structure is disposed between the first radiator and the ground plane, and the first radiator and the ground plane form a monopole radiating structure.

[0090] The first radiator can be of a regular or irregular shape. For example, it can be an inverted J-shape, an inverted U-shape, a T-shape, etc. The ground plane can also be of a regular or irregular shape. For example, it can be a straight line, a U-shape, an S-shape, a wave shape, etc. By rationally designing the shapes of the first radiator and the ground plane, the current path can be increased, the antenna size can be reduced, and impedance matching of the first antenna 102 can be achieved while compressing its size.

[0091] In one possible implementation, see Figure 3 , Figure 3 This is a schematic diagram of the structure of an exemplary first antenna 102.

[0092] The first radiator includes a first radiating part 1022, a second radiating part 1023, and a third radiating part 1024. The first radiating part 1022 and the third radiating part 1024 are arranged along the length direction of the antenna substrate 101; the second radiating part 1023 is arranged along the width direction of the antenna substrate 101.

[0093] In this embodiment, each radiating part has a certain height and width. The radiating part is arranged along the length direction of the antenna substrate 101, which means that the height of the radiating part is significantly greater than its width, and it generally presents a "vertical strip" shape. The radiating part is arranged along the width direction of the antenna substrate 101, which means that the width of the radiating part is greater than its height or the width is close to its height, and it generally presents a "horizontal strip" shape or a shape close to a square.

[0094] The first end of the first radiating part 1022 is a free end, the second end of the first radiating part 1022 is connected to the first end of the second radiating part 1023, the second end of the second radiating part 1023 is connected to the first end of the third radiating part 1024, and the second end of the third radiating part 1024 is connected to the first feeding structure 1021.

[0095] In this embodiment, the first radiating part 1022, the second radiating part 1023, and the third radiating part 1024 can each be a regular shape or a [missing shape]. Figure 3 The irregular shape shown. For example... Figure 3 As shown, the first radiating part 1022, the second radiating part 1023 and the third radiating part 1024 are in an inverted J shape. The irregular shape design can increase the current path in the first radiator and reduce the antenna size.

[0096] Please continue reading Figure 3The first radiating section 1022 has a stepped narrowing shape from its first end to its second end. The second radiating section 1023 is an inverted J-shaped hook. The second radiating section 1023 has a horizontally protruding design, which can construct the horizontal polarization component of the first antenna 102. Compared with the first radiating section 1022 and the third radiating section 1024, the second radiating section 1023 has the strongest current, so the proportion of the constructed horizontal polarization component is larger, which is beneficial to improving the isolation between the first antenna 102 and the second antenna 103. The third radiating section 1024 has an irregularly shaped protrusion between its first end and its second end, which can construct higher-order modes of the first antenna 102. For example, if the first antenna 102 supports the Sub-1GHz frequency band (fundamental mode), the third radiating section 1024 can construct a 5th-order mode, stimulating the higher-order characteristics of the first antenna 102, enabling it to support effective radiation in the 5GHz frequency band.

[0097] The first radiator included in the first antenna 102 has been described above by way of example. The floor will be described below.

[0098] Please continue reading Figure 3 The floor includes a first floor 1025 and a second floor 1026, both of which are arranged along the length direction of the antenna substrate 101.

[0099] The first end of the first ground plane 1025 is a free end, and the second end of the first ground plane 1025 includes a first bent portion disposed along the width direction of the antenna substrate 101. The first bent portion is connected to the first feed structure 1021. The second ground plane 1026 includes a first opening, and the first bent portion is connected to one side of the first opening in the second ground plane 1026 so that the first ground plane 1025 and the second ground plane 1026 form a second opening. The opening direction of the first opening is opposite to the opening direction of the second opening, and the other side of the first opening in the second ground plane 1026 is a free end.

[0100] In this embodiment, the first floor 1025 and the second floor 1026 can be... Figure 3 The structure shown, such as the first floor 1025, is Figure 3 The L-shaped section shown has a second floor panel 1026. Figure 3 The inverted U-shape (or gate-shaped) shown is such that the short L-shaped side of the first floor 1025 connects to one side of the inverted U-shape of the second floor 1026, forming an S-shape with the first floor 1025 and the second floor 1026. In other possible embodiments, the first floor 1025 and the second floor 1026 can also be other shapes, for example, the first floor 1025 can be S-shaped and / or the second floor 1026 can be M-shaped, so that the first floor 1025 and the second floor 1026 form a wave-like shape, etc.

[0101] Compared to traditional linear floor designs that can only introduce capacitance, in this embodiment, the structural design of the floor allows for the compression of the size of the first antenna 102 while introducing equivalent capacitance and equivalent inductance. This enables the inductive and capacitive components of the first antenna 102 to cancel each other out, achieving better antenna impedance matching and improving the radiation efficiency of the first antenna 102.

[0102] The following, combined with Figure 3 The preferred dimensions of the first antenna 102 will be described.

[0103] As described above, the height of the antenna substrate 101 can range from 63.65 mm to 190.95 mm, and the width of the antenna substrate 101 can range from 10 mm to 30 mm. The height of each radiating part and the ground plane is positively correlated with the height of the antenna substrate 101, and the width of each radiating part and the ground plane is positively correlated with the width of the antenna substrate 101. In one embodiment, in this application embodiment, the height of the first radiating part 1022 can range from 18.15 mm to 54.45 mm, the height of the first ground plane 1025 can range from 15.85 mm to 47.55 mm, the height of the second ground plane 1026 can range from 19.25 mm to 57.75 mm, and the opening height of the first opening can range from 11.5 mm to 34.5 mm. In other possible embodiments, the first radiating part 1022, the first ground plane 1025, the second ground plane 1026, and the first opening can also have other size ranges, which are not specifically limited here.

[0104] In one possible implementation, with the antenna substrate 101 having a height of 127.3 mm and a width of 20 mm, the height of the first radiating portion 1022 can be 36.3 mm, the height of the first ground plane 1025 can be 31.7 mm, the height of the second ground plane 1026 can be 38.5 mm, and the opening height of the first opening can be 23 mm, so that the performance of the first antenna 102 is maximized.

[0105] The first antenna 102 has been described above as an example. The second antenna 103 will be described below.

[0106] In this embodiment, the second antenna 103 includes a second radiator, a third radiator, and a second feeding structure. The second feeding structure is disposed between the second radiator and the third radiator, and the second radiator and the third radiator form a dipole radiation structure.

[0107] The second and third radiators can be symmetrically arranged on both sides of the second feed structure. In the embodiments of this application, the second and third radiators can be strictly symmetrically arranged with respect to the horizontal axis of symmetry where the center of the second feed structure is located, or they can be substantially symmetrically arranged with respect to the horizontal axis of symmetry.

[0108] The second and third radiators can be regular or irregular in shape. For example, the second and third radiators can be U-shaped, T-shaped, etc.

[0109] In one possible implementation, see Figure 4 , Figure 4 This is a schematic diagram of the structure of an exemplary second antenna 103.

[0110] The second radiator includes a fourth radiating part 1032, a fifth radiating part 1033, a first bandpass filter radiating part 1034, and a sixth radiating part 1035. The fourth radiating part 1032 and the fifth radiating part 1033 are arranged along the length direction of the antenna substrate 101, and the sixth radiating part 1035 is arranged along the width direction of the antenna substrate 101.

[0111] In this embodiment, the fourth radiating part 1032, the fifth radiating part 1033, the first bandpass filter radiating part 1034, and the sixth radiating part 1035 are connected in sequence to form a second radiator on the antenna substrate 101, and there is a gap between the fourth radiating part 1032 and the sixth radiating part 1035.

[0112] The fourth radiating section 1032 has a free end at its first end and a second end including a second bend along the width of the antenna substrate 101. The second bend is connected to the second feed structure 1031 and also to the first end of the fifth radiating section 1033. In other words, the fourth radiating section 1032 is L-shaped, with the end of the short side of the L-shape connected to the first end of the fifth radiating section 1033, and the back of the short side of the L-shape connected to the second feed structure 1031. The fifth radiating section 1033 and the sixth radiating section 1035 can be... Figure 4 The shape shown can be a regular shape, but it can also be an irregular shape. Figure 4 The fifth radiating part 1033 shown is a vertically shaped rectangle, and the sixth radiating part 1035 is a horizontally shaped rectangle. The first end of the sixth radiating part 1035 is a free end, and the first bandpass filter radiating part 1034 is connected between the second end of the fifth radiating part 1033 and the second end of the sixth radiating part 1035.

[0113] In this way, by designing the fourth radiating part 1032, the fifth radiating part 1033, the first bandpass filter radiating part 1034, and the sixth radiating part 1035 to be connected in sequence, the current path in the second radiator can be increased, thereby improving the antenna efficiency.

[0114] In this embodiment, the second radiator includes a copied toe radiating structure and a serpentine radiating structure arranged in parallel. In one possible implementation, the copied toe radiating structure and the serpentine radiating structure are disposed in the first bandpass filter radiating section 1034. In other possible implementations, the copied toe radiating structure and the serpentine radiating structure may also be disposed in other radiating sections included in the second radiator.

[0115] Please continue reading Figure 4 The left side (the side of the first bandpass filter radiator 1034 closest to the fourth radiator 1032) of the first bandpass filter radiator 1034 has a cross-toe radiating structure, and the right side of the first bandpass filter radiator 1034 has a serpentine radiating structure. A cross-toe radiating structure refers to a radiating structure formed by the intersecting teeth of two comb-shaped radiators, which can be equivalent to a capacitor. A serpentine radiating structure refers to a radiating structure formed by a radiator bending in a snake-like manner, which can be equivalent to an inductor. Thus, the parallel cross-toe radiating structure and the serpentine radiating structure can be equivalent to an LC (Inductor-Capacitor) circuit. The function of the first bandpass filter radiator 1034 will be described in the following embodiments.

[0116] As one implementation method, such as Figure 4 As shown, the second bend is stepped, so that the second bend can form a capacitor structure with the fifth radiating part 1033, introducing capacitance, which can cancel the inductive component and achieve better antenna impedance matching. In particular, when the second antenna 103 supports the 2.4GHz band and the 5GHz band, it can improve the impedance matching of the second antenna 103 in the 5GHz band.

[0117] Furthermore, due to the wider 5GHz band, the stepped second bend can mitigate the impedance abrupt change of the second antenna 103. For example, assuming the second bend is horizontal, the input impedance of the second antenna 103 changes rapidly. It's possible that the input impedance of the second antenna 103 is 50Ω when operating at 5GHz, but drops rapidly to 30Ω when operating near 6GHz, leading to antenna impedance mismatch. In this embodiment, by designing a stepped second bend, the impedance abrupt change of the second antenna 103 can be mitigated, making the input impedance change of the second antenna 103 slower. For example, the input impedance of the second antenna 103 is 50Ω when operating at 5GHz, and 45Ω when operating near 6GHz, thereby ensuring that the second antenna 103 can operate normally at frequencies close to 6GHz, extending the width of the 5GHz band and meeting the requirements of the 5GHz band.

[0118] The second radiator has been introduced above; the third radiator will be introduced below.

[0119] Similar to the second radiator, the third radiator includes a seventh radiating section 1036, an eighth radiating section 1037, a second bandpass filter radiating section 1038, and a ninth radiating section 1039. The seventh radiating section 1036 and the eighth radiating section 1037 are arranged along the length direction of the antenna substrate 101, and the ninth radiating section 1039 is arranged along the width direction of the antenna substrate 101.

[0120] In this embodiment, the seventh radiating part 1036, the eighth radiating part 1037, the second bandpass filter radiating part 1038, and the ninth radiating part 1039 are connected in sequence to form a third radiator on the antenna substrate 101, and there is a gap between the seventh radiating part 1036 and the ninth radiating part 1039.

[0121] In this configuration, the first end of the seventh radiating section 1036 is a free end, and the second end of the seventh radiating section 1036 is connected to the second feed structure 1031. A third bending portion, arranged along the width direction of the antenna substrate 101, is also included between the first end of the seventh radiating section 1036 and the second end of the seventh radiating section 1036. The third bending portion is connected to the first end of the eighth radiating section 1037, and the first end of the ninth radiating section 1039 is a free end. A second bandpass filter radiating section 1038 is connected between the second end of the eighth radiating section 1037 and the second end of the ninth radiating section 1039. That is, the seventh radiating section 1036 is T-shaped, and the eighth radiating section 1037 can be... Figure 4 The regular shape shown can also be other irregular shapes. Figure 4 The eighth radiating part 1037 shown is a vertically shaped rectangle; the ninth radiating part 1039 can be a regular shape, or it can be... Figure 4 The irregular shape shown Figure 4 The ninth radiating section 1039 shown is a rectangular bar with a protrusion at the end away from the second bandpass filter radiating section 1038.

[0122] In this way, by designing the seventh radiating part 1036, the eighth radiating part 1037, the second bandpass filter radiating part 1038, and the ninth radiating part 1039 to be connected in sequence, the current path in the third radiator can be increased, thereby improving the antenna efficiency.

[0123] In this embodiment, similar to the second radiator, the third radiator includes a parallel-connected interdigitated radiating structure and a serpentine radiating structure. In one possible implementation, the parallel-connected interdigitated radiating structure and the serpentine radiating structure are disposed in the second bandpass filter radiating section 1038. In other possible implementations, the parallel-connected interdigitated radiating structure and the serpentine radiating structure may also be disposed in other radiating sections included in the third radiator.

[0124] Please continue reading Figure 4The left side of the second bandpass filter radiator 1038 (the side of the second bandpass filter radiator 1038 closest to the seventh radiator 1036) has a cross-shaped radiating structure, and the right side of the second bandpass filter radiator 1038 has a serpentine radiating structure.

[0125] With the second antenna 103 supporting both the 2.4GHz and 5GHz bands, LC circuits are formed by the first bandpass filter radiator 1034 and the second bandpass filter radiator 1038, respectively, providing bandpass filtering functionality. Taking the first bandpass filter radiator 1034 as an example (the second bandpass filter radiator 1038 is similar), the first bandpass filter radiator 1034 forms a passband characteristic for the 2.4GHz band on the second radiator. That is, for signals in the 2.4GHz band, the first bandpass filter radiator 1034 is equivalent to a conducting state, thereby ensuring the omnidirectional radiation, radiation efficiency, and bandwidth of the 2.4GHz band. The first bandpass filter radiator 1034 also forms a stopband characteristic for the 5GHz band on the second radiator. That is, for signals in the 5GHz band, the first bandpass filter radiator 1034 is equivalent to an open circuit, making the radiator size of the second radiator in the 5GHz band equal to the half-wave size, ensuring the omnidirectional radiation of the 5GHz band, widening the 5GHz band bandwidth, and improving radiation efficiency.

[0126] The following, combined with Figure 4 The preferred dimensions of the second antenna 103 are introduced.

[0127] As mentioned above, the height of the antenna substrate 101 can range from 63.65 mm to 190.95 mm, and the width of the antenna substrate 101 can range from 10 mm to 30 mm. The height of each radiating part is positively correlated with the height of the antenna substrate 101, and the width of each radiating part is positively correlated with the width of the antenna substrate 101. In one embodiment of this application, the height of the fifth radiating part 1033 ranges from 5.675 mm to 17.025 mm, the height of the first bandpass filter radiating part 1034 ranges from 1.6 mm to 4.8 mm, and the width of the first bandpass filter radiating part 1034 ranges from 2.675 mm to 8.025 mm; the height between the first end and the second end of the seventh radiating part 1036 ranges from 6.86 mm to 20.58 mm, the height of the eighth radiating part 1037 ranges from 6.485 mm to 19.455 mm, the width of the ninth radiating part 1039 ranges from 3.7 mm to 11.1 mm, the height of the second bandpass filter radiating part 1038 ranges from 1.6 mm to 4.8 mm, and the width of the second bandpass filter radiating part 1038 ranges from 2.675 mm to 8.025 mm. In other possible implementations, the fifth radiating section 1033 and the first bandpass filter radiating section 1034 may have other size ranges, and the height range between the first end of the seventh radiating section 1036 and the second end of the seventh radiating section, the height range of the eighth radiating section 1037, the width range of the ninth radiating section 1039 and the height range of the second bandpass filter radiating section 1038 may also be other size ranges, which are not specifically limited here.

[0128] In one possible implementation, with the antenna substrate 101 having a height of 127.3 mm and a width of 20 mm, the height of the fifth radiating section 1033 can be 11.35 mm, the height of the first bandpass filter radiating section 1034 can be 3.2 mm, and the width of the first bandpass filter radiating section 1034 can be 5.35 mm; the height between the first end of the seventh radiating section 1036 and the second end of the seventh radiating section can be 13.72 mm, the height of the eighth radiating section 1037 can be 12.97 mm, the width of the ninth radiating section 1039 can be 7.4 mm, and the height of the second bandpass filter radiating section 1038 can be 3.2 mm, and the width of the second bandpass filter radiating section 1038 can be 5.35 mm, so as to maximize the performance of the second antenna 103.

[0129] In one embodiment, see Figure 5 An antenna is provided for an image transmission module, the antenna comprising:

[0130] The antenna substrate 101, the first antenna 102, and the second antenna 103 are provided. The first antenna 102 has a monopole radiating structure, and the second antenna 103 has a dipole radiating structure. The first antenna 102 and the second antenna 103 are disposed on the antenna substrate 101 along its length. The first antenna 102 is used to omnidirectionally radiate signals in the Sub-1GHz and 5GHz frequency bands, and the second antenna 103 is used to omnidirectionally radiate signals in the 2.4GHz and 5GHz frequency bands. The first antenna 102 has a horizontal polarization direction and a vertical polarization direction, and the second antenna 103 has a vertical polarization direction.

[0131] The first antenna 102 includes a first radiating part 1022, a second radiating part 1023, a third radiating part 1024, a first ground plane 1025, a second ground plane 1026, and a first feeding structure 1021.

[0132] The first radiating portion 1022 and the third radiating portion 1024 are arranged along the length direction of the antenna substrate 101; the second radiating portion 1023 is arranged along the width direction of the antenna substrate 101. The first end of the first radiating portion 1022 is a free end, the second end of the first radiating portion 1022 is connected to the first end of the second radiating portion 1023, the second end of the second radiating portion 1023 is connected to the first end of the third radiating portion 1024, and the second end of the third radiating portion 1024 is connected to the first feeding structure 1021.

[0133] Both the first ground plane 1025 and the second ground plane 1026 are arranged along the length direction of the antenna substrate 101. The first end of the first ground plane 1025 is a free end, and the second end of the first ground plane 1025 includes a first bent portion arranged along the width direction of the antenna substrate 101. The first bent portion is connected to the first feed structure 1021. The second ground plane 1026 includes a first opening. The first bent portion is connected to one side of the first opening in the second ground plane 1026 so that the first ground plane 1025 and the second ground plane 1026 form a second opening. The opening direction of the first opening is opposite to the opening direction of the second opening. The other side of the first opening in the second ground plane 1026 is a free end.

[0134] Among them, Line 103 of the second line includes:

[0135] The fourth radiating section 1032, the fifth radiating section 1033, the first bandpass filter radiating section 1034, the sixth radiating section 1035, the seventh radiating section 1036, the eighth radiating section 1037, the second bandpass filter radiating section 1038, the ninth radiating section 1039, and the second feeding structure 1031.

[0136] The fourth radiating section 1032 and the fifth radiating section 1033 are arranged along the length direction of the antenna substrate 101, and the sixth radiating section 1035 is arranged along the width direction of the antenna substrate 101. The first end of the fourth radiating section 1032 is a free end, and the second end of the fourth radiating section 1032 includes a second bent portion arranged along the width direction of the antenna substrate 101. The second bent portion is connected to the second feed structure 1031 and is also connected to the first end of the fifth radiating section 1033. The first end of the sixth radiating section 1035 is a free end, and the first bandpass filter radiating section 1034 is connected between the second end of the fifth radiating section 1033 and the second end of the sixth radiating section 1035. The second bent portion is stepped.

[0137] The seventh radiating part 1036 and the eighth radiating part 1037 are arranged along the length direction of the antenna substrate 101, and the ninth radiating part 1039 is arranged along the width direction of the antenna substrate 101. The first end of the seventh radiating part 1036 is a free end, and the second end of the seventh radiating part 1036 is connected to the second feed structure 1031. A third bending part is also provided between the first end of the seventh radiating part 1036 and the second end of the seventh radiating part, which is arranged along the width direction of the antenna substrate 101. The third bending part is connected to the first end of the eighth radiating part 1037. The first end of the ninth radiating part 1039 is a free end. The second bandpass filter radiating part 1038 is connected between the second end of the eighth radiating part 1037 and the second end of the ninth radiating part 1039.

[0138] Both the first bandpass filter radiator 1034 and the second bandpass filter radiator 1038 include a cross-shaped radiating structure and a serpentine radiating structure arranged in parallel.

[0139] The following is based on Figure 5 Taking the illustrated embodiment as an example, and referring to the effect diagram, the antenna performance of the antenna provided in the embodiment of this application will be introduced.

[0140] Figure 6 This is the radiation pattern of the antenna when it operates at 900MHz according to an embodiment of this application. Figure 7 This is the radiation pattern of the antenna when it operates at 2.45 GHz, according to an embodiment of this application. Figure 8 This is the radiation pattern of the antenna when it operates at 5.5 GHz, according to an embodiment of this application. Figures 6-8 It can be seen that the antenna provided in this application embodiment has excellent omnidirectional coverage characteristics in the Sub1GHz band, 2.4GHz band and 5GHz band.

[0141] Figure 9 This is an S-parameter diagram of the first antenna 102 in an embodiment of this application. Figure 9 In the diagram, the horizontal axis represents frequency, and the vertical axis represents the S11 (input reflection coefficient) parameter. Figure 9It can be seen that the first antenna 102 can support the Sub-1GHz band and the 5GHz band very well.

[0142] Figure 10 This is an S-parameter diagram of the second antenna 103 in an embodiment of this application. Figure 10 In the diagram, the horizontal axis represents frequency, and the vertical axis represents the S22 (output reflection coefficient) parameter. Figure 10 It can be seen that the second antenna 103 can support the 2.4GHz and 5GHz frequency bands very well.

[0143] Figure 11 This is a diagram showing the S-parameters of the first antenna 102 and the second antenna 103 according to an embodiment of this application. Figure 11 In the diagram, the horizontal axis represents frequency, and the vertical axis represents the S21 (forward transmission coefficient) parameter. Figure 10 It can be seen that the isolation between the first antenna 102 and the second antenna 103 meets the standard.

[0144] Figure 12 This is a schematic diagram showing the radiation efficiency of the first antenna 102 in an embodiment of this application. Figure 12 In the diagram, the horizontal axis represents frequency, and the vertical axis represents radiation efficiency. Figure 12 It can be seen that the radiation efficiency of the first antenna 102 is around 90%.

[0145] Figure 13 This is a schematic diagram of the radiation efficiency of the second antenna 103 in an embodiment of this application. Figure 13 In the diagram, the horizontal axis represents frequency, and the vertical axis represents radiation efficiency. Figure 13 It can be seen that the radiation efficiency of the second antenna 103 is above 95%.

[0146] In one embodiment, a wireless communication device is provided, wherein the wireless communication device is provided with an antenna as described in any of the above embodiments.

[0147] Optionally, the wireless communication device may be an image transmission module, which includes a communication module 20 and at least one vertical pole sleeve 30, wherein an antenna as described in any of the above embodiments is disposed within the vertical pole sleeve 30, and the communication module 20 is connected to the antenna.

[0148] For details on the implementation method and beneficial effects of the antenna in the image transmission module, please refer to the relevant descriptions in the above embodiments, which will not be repeated here.

[0149] In the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative descriptions of the above terms do not necessarily refer to the same embodiments or examples.

[0150] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0151] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. An antenna, characterized in that, include: Antenna substrate; The first antenna is a monopole radiating structure; And a second antenna, the second antenna is a dipole radiating structure, the first antenna and the second antenna are disposed on the antenna substrate along the length direction of the antenna substrate; Wherein, the first antenna is used to omnidirectionally radiate signals in a first frequency band, and the second antenna is used to omnidirectionally radiate signals in a second frequency band. The frequency range of the first frequency band and the frequency range of the second frequency band are at least partially different. The first antenna has a horizontal polarization direction and a vertical polarization direction, and the second antenna has a vertical polarization direction, so that the isolation between the first antenna and the second antenna is greater than an isolation threshold.

2. The antenna according to claim 1, characterized in that, The first antenna includes: First radiator; floor; A first power feeding structure is disposed between the first radiator and the floor, and the first radiator and the floor form a monopole radiation structure.

3. The antenna according to claim 2, characterized in that, The first radiator includes a first radiating part, a second radiating part, and a third radiating part; The first radiating part and the third radiating part are arranged along the length direction of the antenna substrate; the second radiating part is arranged along the width direction of the antenna substrate. The first end of the first radiating part is a free end, the second end of the first radiating part is connected to the first end of the second radiating part, the second end of the second radiating part is connected to the first end of the third radiating part, and the second end of the third radiating part is connected to the first feeding structure.

4. The antenna according to claim 3, characterized in that, The height of the first radiating part ranges from 18.15 mm to 54.45 mm.

5. The antenna according to claim 3 or 4, characterized in that, The floor includes a first floor and a second floor, both of which are arranged along the length direction of the antenna substrate; The first end of the first ground plane is a free end, and the second end of the first ground plane includes a first bent portion disposed along the width direction of the antenna substrate, the first bent portion being connected to the first feeding structure; The second floor includes a first opening, and the first bend is connected to one side of the first opening in the second floor so that the first floor and the second floor form a second opening. The opening direction of the first opening is opposite to the opening direction of the second opening, and the other side of the first opening in the second floor is a free end.

6. The antenna according to claim 5, characterized in that, The height of the first floor ranges from 15.85 mm to 47.55 mm; the height of the second floor ranges from 19.25 mm to 57.75 mm; and the opening height of the first opening ranges from 11.5 mm to 34.5 mm.

7. The antenna according to claim 1, characterized in that, The second antenna includes: Second radiator; Third radiator; The second feeding structure is disposed between the second radiator and the third radiator, and the second radiator and the third radiator form a dipole radiation structure.

8. The antenna according to claim 7, characterized in that, The second radiator includes a fourth radiating section, a fifth radiating section, a first bandpass filter radiating section, and a sixth radiating section; The fourth and fifth radiating portions are arranged along the length direction of the antenna substrate, and the sixth radiating portion is arranged along the width direction of the antenna substrate. The first end of the fourth radiating part is a free end, and the second end of the fourth radiating part includes a second bent part disposed along the width direction of the antenna substrate. The second bent part is connected to the second feeding structure and is also connected to the first end of the fifth radiating part. The first end of the sixth radiating part is a free end, and the first bandpass filter radiating part is connected between the second end of the fifth radiating part and the second end of the sixth radiating part.

9. The antenna according to claim 7, characterized in that, The second radiator includes a cross-shaped radiating structure and a serpentine radiating structure arranged in parallel.

10. The antenna according to claim 8, characterized in that, The height of the fifth radiating element ranges from 5.675 mm to 17.025 mm, the height of the first bandpass filter radiating element ranges from 1.6 mm to 4.8 mm, and the width of the first bandpass filter radiating element ranges from 2.675 mm to 8.025 mm.

11. The antenna according to any one of claims 7-10, characterized in that, The third radiator includes a seventh radiating section, an eighth radiating section, a second bandpass filter radiating section, and a ninth radiating section. The seventh and eighth radiating portions are arranged along the length direction of the antenna substrate, and the ninth radiating portion is arranged along the width direction of the antenna substrate. The first end of the seventh radiating part is a free end, the second end of the seventh radiating part is connected to the second feeding structure, and a third bending part is further provided along the width direction of the antenna substrate between the first end of the seventh radiating part and the second end of the seventh radiating part. The third bending part is connected to the first end of the eighth radiating part, the first end of the ninth radiating part is a free end, and the second bandpass filter radiating part is connected between the second end of the eighth radiating part and the second end of the ninth radiating part.

12. The antenna according to any one of claims 7-10, characterized in that, The third radiator includes a cross-shaped radiating structure and a serpentine radiating structure arranged in parallel.

13. The antenna according to claim 11, characterized in that, The height range between the first end and the second end of the seventh radiating part is 6.86 mm to 20.58 mm, the height range of the eighth radiating part is 6.485 mm to 19.455 mm, the width range of the ninth radiating part is 3.7 mm to 11.1 mm, the height range of the second bandpass filter radiating part is 1.6 mm to 4.8 mm, and the width range of the second bandpass filter radiating part is 2.675 mm to 8.025 mm.

14. A wireless communication device, characterized in that, The wireless communication device is provided with an antenna as described in any one of claims 1 to 13.

15. The wireless communication device according to claim 14, characterized in that, The wireless communication device includes an image transmission module, which includes a communication module and at least one vertical pole sleeve. An antenna as described in any one of claims 1 to 13 is disposed inside the vertical pole sleeve, and the communication module is connected to the antenna.

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