Antenna and network equipment

Abstract

The embodiment of the utility model discloses an antenna and network equipment, and relates to the technical field of antennas. The utility model aims to optimize the performance of the antenna. According to the specific scheme, the antenna comprises a conductive shell and a radiation structure. The conductive housing is used for grounding. The conductive shell comprises an inner cavity, a first opening and a second opening, and the first opening and the second opening are both communicated with the inner cavity. The size of the first opening in the first direction is greater than or equal to 1 time lambda; lambda is the dielectric waveguide wavelength corresponding to the center frequency of the antenna. One end of the radiation structure is electrically connected with the conductive shell. The radiation structure covers part of the second opening and forms a first gap and a second gap with the conductive shell. The first gap is communicated with the first opening in the extending direction of the first gap. The second gap is communicated with the first opening in the extending direction of the second gap. The antenna has the advantages of wide bandwidth, high gain, good directional diagram roundness, horizontal polarization, horizontal plane omnidirectional radiation and the like, and can be used for scenes such as WLAN or FTTR and the like.

Description

Technical Field

[0001] This application relates to the field of antenna technology, and more particularly to an antenna and network device. Background Technology

[0002] Wireless local area networks (WLANs) are widely used in homes, offices, and other indoor / outdoor environments such as fiber-to-the-room (FTTR). Antenna performance is a crucial factor affecting the communication performance of WLAN systems and terminals.

[0003] Therefore, optimizing antenna performance is a problem that needs to be solved. Utility Model Content

[0004] This application provides an antenna and a network device designed to optimize antenna performance.

[0005] To achieve the above objectives, this application adopts the following technical solution.

[0006] In a first aspect, this application provides an antenna. The antenna includes a conductive housing and a radiating structure. The conductive housing is used for grounding. The conductive housing includes an inner cavity, a first opening, and a second opening, both of which communicate with the inner cavity. The dimension of the first opening along a first direction is greater than or equal to λ times; λ is the wavelength of the dielectric waveguide corresponding to the center frequency of the antenna. One end of the radiating structure is electrically connected to the conductive housing. The radiating structure partially covers the second opening and forms a first gap and a second gap with the conductive housing. Along the extension direction of the first gap, the first gap communicates with the first opening. Along the extension direction of the second gap, the second gap communicates with the first opening.

[0007] Thus, after receiving excitation, the antenna's radiating structure radiates electromagnetic wave signals in the first frequency band. The inner cavity of the conductive shell is then excited again to radiate electromagnetic wave signals in the second frequency band. If the frequencies of the first and second frequency bands are similar, a broadband signal is formed; if the frequencies of the first and second frequency bands differ significantly, a dual-frequency signal is formed. This is beneficial for improving antenna performance.

[0008] In conjunction with the first aspect, in some feasible ways, the vertical projection of the inner wall of the conductive housing onto the surface of the first opening lies within the first opening. This avoids the edge of the first opening constraining electromagnetic waves radiated from the cavity, allowing electromagnetic waves generated within the cavity to radiate more effectively from the first opening.

[0009] With reference to the first aspect, in some possible implementation, the conductive shell includes a bottom wall and a side wall connected, the first opening is opposite to the bottom wall, and the first slit and the second slit are located on the side wall. In this way, the circularity of the antenna pattern can be improved.

[0010] With reference to the first aspect, in some possible implementation, the extension direction of the first slit is parallel to the extension direction of the second slit. In this way, the problem of the antenna pattern tilt can be improved, and the gain of the electromagnetic wave radiated by the antenna in each direction is high.

[0011] With reference to the first aspect, in some possible implementation, the radiation structure includes a first conductive part, a second conductive part and a ring-shaped slit, the ring-shaped slit is annularly arranged at the outer periphery of the first conductive part, and the ring-shaped slit is arranged between the first conductive part and the second conductive part. The first conductive part serves as a feed end of the antenna, and one end of the second conductive part is electrically connected to the conductive shell.

[0012] In this way, after the first conductive part serving as the feed end of the antenna receives excitation, the first conductive part is coupled to the second conductive part through the ring-shaped slit, the second conductive part radiates electromagnetic waves, and the electromagnetic waves are secondarily excited to radiate electromagnetic waves after propagating to the inner cavity, so that the bandwidth of the antenna can be improved.

[0013] With reference to the first aspect, in some possible implementation, the first slit and the second slit are symmetric about the center of the ring-shaped slit. In this way, the uniformity of the current on the second conductive part can be further improved, and the circularity of the antenna pattern can be improved.

[0014] With reference to the first aspect, in some possible implementation, the ring-shaped slit is a circular ring or a polygonal ring. In this way, the current distribution on the second conductive part can be uniform, and the radiation circularity of the antenna can be improved.

[0015] With reference to the first aspect, in some possible implementation, the antenna further includes a dielectric layer located in the inner cavity. Since the dielectric constant of the dielectric layer is greater than that of air, the dielectric layer can shorten the electrical length of the antenna and reduce the size of the antenna.

[0016] With reference to the first aspect, in some possible implementation, the antenna further includes a dielectric layer connected to the surface of the radiation structure away from the inner cavity. Since the dielectric constant of the dielectric layer is greater than that of air, the dielectric layer can shorten the electrical length of the antenna and reduce the size of the antenna.

[0017] With reference to the first aspect, in some possible implementation, the conductive shell is long-strip-shaped. In this way, the current on the conductive shell can periodically oscillate along the length direction of the conductive shell, and the aperture of the antenna can be expanded to improve the gain.

[0018] With reference to the first aspect, in some possible implementation, along the length direction of the conductive shell, the distance from the first slit to one end of the conductive shell is equal to the distance from the second slit to the other end of the conductive shell. In this way, the current on the first side plate is uniformly distributed, and the circularity of the antenna pattern is improved.

[0019] With reference to the first aspect, in some possible implementation, the antenna further includes a feed line, the feed line includes a signal line and a ground line, and the signal line is connected to the radiating structure. The conductive shell includes oppositely arranged first and second side plates, and the first and second slits are both located on the first side plate. The ground line is connected to the second side plate. In this way, the circularity of the antenna pattern is improved, and the antenna pattern is more symmetrical.

[0020] With reference to the first aspect, in some possible implementation, the antenna further includes a conductive box. The conductive box includes a cavity and a third opening. The third opening has a dimension along the first direction that is different from a dimension of the first opening along the first direction. The first opening and the third opening are opposite to each other, and the conductive shell and the conductive box are coupled. The first opening and the third opening at least partially overlap in a vertical projection of a surface of the first opening.

[0021] In this way, the cavity can secondarily stimulate the electromagnetic waves radiated by the inner cavity, and the bandwidth of the antenna is further improved. The dimension of the third opening along the first direction is different from the dimension of the first opening along the first direction, and therefore the frequency bands of the electromagnetic waves radiated by the inner cavity and the electromagnetic waves radiated by the conductive shell do not completely overlap, and the bandwidth of the antenna can be widened.

[0022] With reference to the first aspect, in some possible implementation, the depth of the cavity and the depth of the inner cavity are both greater than the distance from the first opening to the third opening. In this way, the cavity is more likely to receive the electromagnetic waves radiated by the inner cavity and achieve secondary stimulation. The conductive box and the conductive shell have good coupling performance, and the gain of the antenna is improved.

[0023] In a second aspect, an embodiment of the present application provides an antenna. The antenna includes a conductive shell and a radiating structure. The conductive shell is used for grounding, and the conductive shell includes a connected inner cavity and an opening. The dimension of the opening along a first direction is greater than or equal to times of λ, where λ is a dielectric waveguide wavelength corresponding to a center frequency of the antenna. The conductive shell further includes a plurality of first slits, and the plurality of first slits are distributed at intervals along the length direction of the first slit. The radiating structure is coupled to the conductive shell through a second slit, the second slit is arranged around the outer periphery of the radiating structure, and both ends of the second slit are connected to the opening.

[0024] Thus, after the antenna is excited, the radiating structure radiates electromagnetic wave signals of the first frequency band. The inner cavity of the conductive shell is excited again to radiate electromagnetic wave signals of the second frequency band. If the frequencies of the first frequency band and the second frequency band are similar, a wideband is formed, and if the frequencies of the first frequency band and the second frequency band are quite different, a dual-frequency signal is formed. This is beneficial to improving the performance of the antenna. The omni-directionality of the electromagnetic waves radiated by the inner cavity is better, and the directivity pattern of the antenna is better.

[0025] With reference to the second aspect, in some possible implementation manners, along the length direction of the first slit, one of the plurality of first slits is in communication with the second slit. In this way, the coupling efficiency of the first slit and the radiating structure can be further improved, and the gain of the antenna can be improved.

[0026] With reference to the second aspect, in some possible implementation manners, the antenna further includes a dielectric layer connected to the surface of the radiating structure away from the inner cavity. Since the dielectric constant of the dielectric layer is greater than that of air, the dielectric layer can shorten the electrical length of the antenna and reduce the size of the antenna.

[0027] With reference to the second aspect, in some possible implementation manners, the conductive shell is long-strip-shaped. In this way, the current on the conductive shell can periodically oscillate along the length direction of the conductive shell, which is beneficial to expanding the aperture of the antenna to improve the gain.

[0028] With reference to the second aspect, in some possible implementation manners, the antenna further includes a feeding line including a signal line and a ground line, and the signal line is connected to the radiating structure. The conductive shell includes oppositely arranged first and second side plates, and the first slit and the second slit are both located on the first side plate, and the ground line is connected to the second side plate. In this way, the circular degree of the directivity pattern of the antenna can be improved, and the directivity pattern of the antenna can be more symmetrical.

[0029] With reference to the second aspect, in some possible implementation manners, the antenna further includes a conductive box. The conductive box includes a cavity in communication and a third opening. The size of the third opening along the first direction is not equal to the size of the first opening along the first direction; the first opening and the third opening are opposite, and the conductive shell and the conductive box are coupled. The first opening and the third opening at least partially overlap in the vertical projection of the surface of the first opening.

[0030] In a third aspect, the present application provides a network device. The network device includes a shell and any one of the antennas provided in the first aspect or the second aspect, and the antenna is arranged in the shell.

[0031] The beneficial effects of the third aspect can be referred to the description of any one of the optional implementation manners of the first aspect and the second aspect, which will not be described herein again. On the basis of the implementation manners of the above aspects, the present application can be further combined to provide more implementation manners. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of a network device and terminal.

[0033] Figure 2 It is a structural schematic diagram of an antenna provided by an embodiment of the application.

[0034] Figure 3 It is a structural schematic diagram of Figure 2 It is an exploded structural schematic diagram of the antenna shown in the figure.

[0035] Figure 4 It is a structural schematic diagram of a first side plate and radiation structure provided by an embodiment of the application.

[0036] Figure 5a It is a structural schematic diagram of another antenna provided by an embodiment of the application.

[0037] Figure 5b It is a structural schematic diagram of Figure 5a It is an exploded structural schematic diagram of the antenna shown in the figure.

[0038] Figure 6a It is a structural schematic diagram of still another antenna provided by an embodiment of the application.

[0039] Figure 6b It is a structural schematic diagram of Figure 6a It is an exploded structural schematic diagram of the antenna shown in the figure.

[0040] Figure 7 It is an S11 parameter diagram of the antenna shown in the figure. Figure 2

[0041] It is a 3D directivity diagram of the antenna shown in the figure at 5.3 GHz. Figure 8 Figure 2 It is a 3D directivity diagram of the antenna shown in the figure at 5.5 GHz.

[0042] Figure 9 Figure 2 It is a 3D directivity diagram of the antenna shown in the figure at 5.8 GHz.

[0043] Figure 10 It is a 3D directivity diagram of the antenna shown in the figure at 5.8 GHz. Figure 2

[0044] ​​​In the figure: 10-network device; 11-terminal; 12-outer shell; 100-antenna; 110-conductive shell; 120-radiating structure; 113-internal cavity; 111-first opening; 112-second opening; 121-first end; 122-second end; 103-bottom wall; 114-side wall; 115-first side plate; 116-upper cover; 101-first slot; 123-first conductive part; 124-second conductive part; 125-annular slot; 102-second slot; 140-feeder wire; 141-signal line; 142-ground wire; 117-second side plate; 200-conductive box; 201-third opening; 202-cavity; 300-antenna; 210-conductive shell; 220-radiating structure; 211-internal cavity; 212-opening; 301-first slot; 302-second slot; 221-first section; 222-second section; 223-third section; 230-dielectric layer; 021-cover; 022-bottom plate; 130-dielectric layer. DETAILED DESCRIPTION

[0045] In order to make the purposes, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings.

[0046] Hereinafter, the terms "first", "second", and the like are only used for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second", and the like can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0047] In addition, in the present application, the orientation terms such as "upper", "lower", and the like are defined with respect to the orientation in which the components in the drawings are placed, and it should be understood that these directional terms are relative concepts, which are used for relative description and clarification, and they can be changed accordingly according to the change of the orientation in which the components are placed in the drawings.

[0048] Antenna return loss: It can be understood as the ratio of the signal power reflected back to the antenna port through the antenna circuit to the antenna port transmission power. The smaller the reflected signal, the greater the signal radiated into space through the antenna, and the greater the radiation efficiency of the antenna. The greater the reflected signal, the smaller the signal radiated into space through the antenna, and the smaller the radiation efficiency of the antenna.

[0049] The antenna return loss can be represented by the S11 parameter, and S11 belongs to one of the S parameters. S11 represents the reflection coefficient, and this parameter can represent the advantages and disadvantages of the antenna transmission efficiency.

[0050] In some embodiments, the S11 graph can be understood as a schematic graph for representing the resonance generated by the antenna. In some embodiments, the resonance shown in the S11 graph in the part less than -4dB can be understood as the resonance frequency range generated by the antenna. The S11 parameter is usually negative, the smaller the S11 parameter, the smaller the antenna return loss, the smaller the energy reflected back by the antenna itself, that is, the more energy actually entering the antenna, the higher the system efficiency of the antenna; the larger the S11 parameter, the larger the antenna return loss, the lower the system efficiency of the antenna.

[0051] Communication frequency band / working frequency band: no matter what type of antenna, it always works in a certain frequency range (bandwidth). For example, an antenna supporting B40 frequency band, its working frequency band includes the frequency in the range of 2300MHz-2400MHz, or in other words, the working frequency band of the antenna includes B40 frequency band.

[0052] Resonance frequency range or resonance frequency band, and working frequency band can be the same, or can partially overlap. In one embodiment, one or more resonance frequency bands of the antenna can cover one or more working frequency bands of the antenna.

[0053] It should be noted that in engineering, -4dB is generally used as a standard for S11 value, when the S11 value of the antenna is less than -4dB, it can be considered that the antenna can work normally, or it can be considered that the transmission efficiency of the antenna is better. It should be understood that in engineering, -6dB can also be generally used as a standard for S11 value, when the S11 value of the antenna is less than -6dB, it can be considered that the antenna can work normally, or it can be considered that the transmission efficiency of the antenna is better.

[0054] Coupling: can be understood as direct coupling or indirect coupling, "coupling connection" can be understood as direct coupling connection and / or indirect coupling connection. Direct coupling can also be referred to as "electrical connection", which is understood as physical contact and electrical conduction between components; it can also be understood as a form of connection between different components in the circuit structure through printed circuit board (PCB), copper foil or wire, etc. The entity line can transmit electrical signals; "indirect coupling" can be understood as electrical conduction between two conductors through space / non-contact. In one embodiment, indirect coupling can also be referred to as capacitive coupling, for example, through the coupling between the gap between two conductive parts to form an equivalent capacitor to realize signal transmission.

[0055] Antenna directional diagram: also known as radiation pattern. It refers to the pattern of relative field strength (normalized modulus) of the antenna radiation field changing with direction at a distance away from the low-frequency antenna. It is usually represented by two mutually perpendicular plane directional diagrams in the maximum radiation direction of the antenna.

[0056] Antenna patterns usually have multiple beams of radiation. The beam with the highest intensity is called the main lobe, and the remaining beams are called side lobes or side lobes. In the side lobe, the side lobe in the opposite direction of the main lobe is also called the back lobe.

[0057] dB: It is decibel, a logarithmic concept with base 10. Decibel is only used to evaluate the ratio between one physical quantity and another physical quantity, and it itself has no physical dimension. The ratio between the two quantities increases by 10 times, and the difference between them can be expressed as 10 decibels. For example: A = "100", B = "10", C = "5", D = "1", then A / D = 20dB; B / D = 10dB; C / D = 7dB; B / C = 3dB. That is, the difference between two quantities of 10 decibels is 10 times, the difference between 20 decibels is 100 times, and so on. The difference between 3dB is 2 times.

[0058] dBi: Generally mentioned together with dBd. dBi and dBd are units of power gain, both are relative values, but the reference bases are different. The reference base of dBi is omnidirectional antenna; the reference base of dBd is dipole. It is generally believed that dBi and dBd represent the same gain, and the value represented by dBi is 2.15dBi larger than that represented by dBd. For example: for an antenna with a gain of 16dBd, its gain converted into dBi is 18.15dBi, generally ignoring the decimal place, it is 18dBi.

[0059] E-plane: Also called E-plane, for linearly polarized antennas, the E-plane is the plane containing the electric field vector (also called E aperture) and the direction of maximum radiation. The electric field or "E" plane determines the polarization or direction of the radio wave. For vertically polarized antennas, the E-plane usually coincides with the vertical / altitude plane. For horizontally polarized antennas, the E-plane usually coincides with the horizontal / azimuth plane. The E-plane and H-plane should be 90 degrees apart.

[0060] H-plane: Also called H-plane, the magnetic plane is the plane containing the magnetic field vector (also called H aperture) and the direction of maximum radiation. In the same linearly polarized antenna, the magnetization field or "H" plane is perpendicular to the "E" plane. For vertically polarized antennas, the H-plane usually coincides with the horizontal / azimuth plane. For horizontally polarized antennas, the H-plane usually coincides with the vertical / altitude plane.

[0061] Operating bandwidth: The operating bandwidth of an antenna unit refers to the frequency range in which it effectively works. In engineering, the frequency band in which the S11 parameter is less than -10dB or less than -5dB is usually called the operating bandwidth.

[0062] Radiating body or radiating structure: is the device in the antenna for receiving / sending electromagnetic wave radiation. In some cases, the "antenna" is understood in a narrow sense as a radiating body, which changes the waveguide energy from the transmitter into radio waves, or converts radio waves into waveguide energy for radiating and receiving radio waves. The modulated high-frequency current energy (or waveguide energy) generated by the transmitter is transmitted to the transmitting radiating body through the feeder, which is converted into electromagnetic wave energy of a certain polarization by the radiating body and radiated in the desired direction. The receiving radiating body converts electromagnetic wave energy of a certain polarization from a certain direction in space into modulated high-frequency current energy, which is delivered to the input end of the receiver through the feeder.

[0063] The radiating body can be a conductor with a certain shape and size, such as a wire or a sheet, etc. The application does not limit the specific shape. In one embodiment, the wire-shaped radiating body can be simply referred to as a wire antenna.

[0064] The feeding part or the feeding end is a combination of all components of the antenna for the purpose of receiving and transmitting radio waves. In the case of a receiving antenna, the feeding part can be considered as the antenna part from the first amplifier to the front-end transmitter. In a transmitting antenna, the feeding part can be considered as the part after the last power amplifier.

[0065] Antenna pattern: also known as radiation pattern. It refers to the relative field strength (normalized modulus) of the antenna radiation field at a distance from the low-frequency antenna, which changes with direction. It is usually represented by two mutually perpendicular plane patterns through the maximum radiation direction of the antenna.

[0066] Antenna array: an antenna array arranged according to certain rules by a plurality of identical (or different) antenna units. By controlling the controller, the amplitude and phase of the current fed to each antenna unit are controlled to control the radiation pattern of the array antenna. This method can also be referred to as beamforming. Beamforming can be achieved through a phased array antenna control system to obtain high gain in a certain direction, or to realize scanning of the array antenna beam.

[0067] Figure 1 A schematic structural diagram of a network device 10 and a terminal 11. Please refer to Figure 1 The network device 10 includes a housing 12 and an antenna 100. The antenna 100 is arranged in the housing 12.

[0068] Exemplarily, the network device 10 is used to connect the user's terminal (terminal) 11. The terminal 11 can also be referred to as a terminal device, a user equipment (UE), a mobile station (MS), a mobile terminal (MT), or a terminal unit (STA), etc.

[0069] In some embodiments, the terminal can be a mobile phone, a tablet computer, a computer with wireless transceiver function, a personal communication service (PCS) phone, a desktop computer, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in a smart home, and the like.

[0070] The embodiments of the present application do not limit the type of network device 10. Illustratively, the network device can be a routing and forwarding device with optical communication function, for example, the routing and forwarding device can be a router or a switch, etc. The network device can also be a broadband network gateway (BNG) or a broadband remote access server (BRAS) with optical communication function, etc.

[0071] The terminal 11 can access a server by using the network device 10. A user can use the terminal to establish a communication connection with the network device by using wireless local area network technology, so that the terminal sends a data packet to the server.

[0072] The embodiments of the present application do not limit the application scenario of the network device 10. Illustratively, the network device 10 can be applied to an FTTR scenario or an optical network termination (ONT) scenario, etc.

[0073] The aforementioned FTTR refers to replacing network cables with optical fibers, laying optical fibers to each room, and realizing interconnection with a home gateway by deploying an optical network device, in combination with wireless communication, to guarantee network coverage in the whole house.

[0074] In the embodiment of the present application applied to FTTR, the aforementioned network device can be an FTTR access device. In the embodiment of the present application applied to an optical network termination, the aforementioned network device can be a device in the optical network termination.

[0075] Figure 2 A structural schematic diagram of an antenna 100 provided by the embodiments of the present application is shown in FIG. 1. As shown in FIG. 1, the antenna 100 includes a conductive shell 110 and a radiation structure 120. The conductive shell 110 is used for grounding, and the radiation structure 120 is used for radiating electromagnetic waves. Figure 2

[0076] Figure 3 A structural schematic diagram of an antenna 100 provided by the embodiments of the present application is shown in FIG. 1. As shown in FIG. 1, the antenna 100 includes a conductive shell 110 and a radiation structure 120. The conductive shell 110 is used for grounding, and the radiation structure 120 is used for radiating electromagnetic waves. Figure 2 ​An exploded structural diagram of the antenna 100 is shown. Please refer to Figure 3 The conductive shell 110 includes an inner cavity 113, a first opening 111 and a second opening 112. The first opening 111 and the second opening 112 are both in communication with the inner cavity 113; the size of the first opening 111 along the first direction is greater than or equal to 1 times λ; λ is the corresponding dielectric waveguide wavelength.

[0077] The radiation structure 120 is connected to the conductive shell 110 at one end, covers part of the second opening 112, and forms a first slot 101 and a second slot 102 with the conductive shell 110. Along the extension direction of the first slot 101, the first slot 101 is in communication with the first opening 111; along the extension direction of the second slot 102, the second slot 102 is in communication with the first opening 111.

[0078] In this way, after the antenna 100 is excited, the radiation structure 120 radiates electromagnetic wave signals of the first frequency band. The inner cavity 113 of the conductive shell 110 is excited again to radiate electromagnetic wave signals of the second frequency band. If the frequencies of the first frequency band and the second frequency band are similar, a wideband is formed, and if the frequencies of the first frequency band and the second frequency band are quite different, a dual-frequency signal is formed. This is conducive to improving the performance of the antenna 100.

[0079] In addition, the inner cavity 113 radiates electromagnetic waves with good omnidirectionality, and the antenna 100 has good directivity circularity.

[0080] Compared with a half-mode antenna or a loop antenna, multiple half-mode antennas or multiple loop antennas arranged in an array are needed to construct an equivalent loop current, which increases the preparation cost and the space occupied in the array direction. The antenna 100 provided in the embodiments of the present application can construct an equivalent loop current by using the conductive shell 110, and the antenna 100 occupies less space and has a lower preparation cost.

[0081] The antenna 100 provided in the embodiments of the present application can be regarded as a magnetic dipole antenna, and the antenna 100 is a horizontally polarized omnidirectional antenna with rich polarization angles. In the embodiments of the present application, the radiation structure 120 can be regarded as an inverted F antenna (IFA). The inverted F antenna can be regarded as being obtained by adding a grounding path to a monopole antenna. The IFA antenna has one feeding point and one grounding point, and is called an inverted F antenna because its side view is in the shape of an inverted F.

[0082] In the embodiment in which the radiation structure 120 is a sheet-shaped structure, the radiation structure 120 can be regarded as a planar inverted F antenna (PIFA).

[0083] Exemplarily, the radiation structure 120 includes a first end 121 and a second end 122 oppositely arranged, and the first end 121 is connected with the conductive shell 110. The second end 122 is an open end, which can also be referred to as an open end. In other words, the second end 122 is not electrically connected with the rest of the structure outside the radiation structure 120.

[0084] The first slit 101 extends from the first end 121 to the second end 122, and the second slit 102 also extends from the first end 121 to the second end 122. In the extension direction of the first slit 101, it is referred to as the length direction of the first slit 101. In the extension direction of the first slit 101, the first slit 101 is in communication with the first opening 111, which means that the first slit 101 extends to the first opening 111. The extension direction of the second slit 102 is the same.

[0085] The aforementioned "center frequency of the antenna 100" refers to the median of the operating frequency range of the antenna 100.

[0086] The embodiment of the present application does not limit the center frequency of the operating frequency range of the antenna 100. Exemplarily, the center frequency of the operating frequency range of the antenna 100 is in the range of 4 GHz-6 GHz.

[0087] The aforementioned size of the first opening 111 in the first direction is greater than or equal to 1 times λ. This allows the inner cavity 113 of the conductive shell 110 to radiate electromagnetic wave signals of the second frequency band outward. Exemplarily, the size of the first opening 111 in the first direction can be 1 times λ-5 times λ, for example, 1 times λ, 1.2 times λ, 1.5 times λ, 2 times λ, 2.5 times λ, 3 times λ, 4 times λ, 4.5 times λ, 5 times λ, 6 times λ, 8 times λ, or 10 times λ, etc.

[0088] In the embodiment of the present application, the size of the first opening 111 in the first direction is greater than or equal to 1 times λ. The first direction can be any direction. In some embodiments, the size of the first opening 111 in multiple directions is greater than or equal to 1 times λ, and the first direction can be one of the aforementioned multiple directions.

[0089] In some embodiments of the present application, the size of the first opening 111 in the first direction is greater than or equal to the size of the inner cavity 113 in the first direction. In this way, the electromagnetic waves generated in the inner cavity 113 can be better radiated from the first opening 111. In some embodiments of the present application, the size of the first opening 111 in the first direction can be smaller than the size of the inner cavity 113 in the first direction.

[0090] The embodiment of the present application does not limit the shape of the first opening 111. Exemplarily, the shape of the first opening 111 can be quadrilateral, oval, circular, or irregular, etc. Figure 3In an example, the first opening 111 is a rectangle.

[0091] The shape of the second opening 112 is not limited in the embodiments of the present application. For example, the shape of the second opening 112 can be a quadrilateral, an ellipse, a circle, or an irregular shape, etc.

[0092] The shape of the conductive shell 110 is not limited in the embodiments of the present application. For example, the conductive shell 110 is a long strip. In this way, the current on the conductive shell 110 can periodically oscillate along the length direction of the conductive shell 110, which is beneficial to expand the aperture of the antenna 100 to improve the gain.

[0093] The aforementioned long strip refers to that the dimension of the conductive shell 110 along one direction is greater than the dimension of the conductive shell 110 along other directions. The aforementioned long strip includes but is not limited to a cuboid, an ellipsoid, a triangular prism, a pentagonal prism, a cylinder, or an S-shaped column, etc. The length direction of the conductive shell 110 is defined as the length direction of the conductive shell 110. For example, the length direction of the conductive shell 110 is parallel to the long side of the cuboid. For example, the length direction of the conductive shell 110 is parallel to the axis direction of the cylinder.

[0094] The shape of the inner cavity 113 is not limited in the embodiments of the present application. For example, the inner cavity 113 can be a cuboid, a cylinder, or an ellipsoid, etc.

[0095] Figure 3 In an example, the inner cavity 113 of the conductive shell 110 is a cuboid, and the first opening 111 is a cuboid. The cross section of the inner cavity 113 is the same as the shape of the first opening 111.

[0096] Figure 3 In an example, the vertical projection of the inner wall of the conductive shell 110 on the surface of the first opening 111 is located in the first opening 111. In other words, compared with the inner cavity 113, the area of the first opening 111 is larger, and the area of the first opening 111 is greater than or equal to the cross section size of the inner cavity 113. The aforementioned cross section of the inner cavity 113 is parallel to the first opening 111.

[0097] In this way, the edge of the first opening 111 can avoid restricting the electromagnetic wave radiated by the inner cavity 113, and the electrical performance of the antenna 100 can be improved.

[0098] In the above description, the “vertical projection of the inner wall of the conductive shell 110 on the surface of the first opening 111” refers to the projection of the inner wall of the conductive shell 110 on the first opening 111 along the direction perpendicular to the surface of the first opening 111. The same applies to the description of the “vertical projection” in this document.

[0099] In some embodiments of the present application, when the size of the first opening 111 in one direction is greater than or equal to 1 times λ, the vertical projection of the inner wall of the conductive shell 110 on the surface of the first opening 111 can be partially located in the first opening 111 and partially located outside the first opening 111.

[0100] Figure 3 In the example of FIG. 1, the conductive shell 110 includes a bottom wall 103 and a side wall 114, and the bottom wall 103 and the side wall 114 jointly enclose the inner cavity 113. The bottom wall 103 is opposite to the first opening 111, and the first slit 101 and the second slit 102 are located on the side wall 114. In other words, the first slit 101 does not extend to the bottom wall 103, and the second slit 102 does not extend to the bottom wall 103. The second opening 112 is arranged on the side wall 114, which is beneficial to the circularity of the directional diagram of the antenna 100.

[0101] In some embodiments of the present application, the first slit 101 can extend to the bottom wall 103, and the second slit 102 can extend to the bottom wall 103.

[0102] In the embodiments of the present application, the conductive shell 110 includes a first side plate 115 and a top cover 116. The first side plate 115 and the top cover 116 are connected, and the first side plate 115 and the top cover 116 jointly enclose the inner cavity 113. The second opening 112 is located on the first side plate 115, and the first slit 101 and the second slit 102 are located on the first side plate 115. The bottom wall 103 is located on the top cover 116, and the first opening 111 is located between the first side plate 115 and the top cover 116.

[0103] Exemplarily, the top cover 116 can be an integrally formed piece. The first side plate 115 and the top cover 116 can be connected through a solder layer or a conductive adhesive layer. In this way, the first side plate 115 and the top cover 116 can be formed through different processes. For example, the first side plate 115 can be formed through a printed circuit board (PCB) process, and the top cover 116 can be formed through bending of a conductive plate.

[0104] In some embodiments of the present application, the top cover 116 can be connected by a plurality of plate bodies. For example, the top cover 116 includes three edge plates and a second side plate 117, and the second side plate 117 is arranged opposite to the first side plate 115, and the three edge plates are arranged between the second side plate 117 and the first side plate 115.

[0105] It can be understood that, in the embodiments of the present application, the connection position of the first side plate 115 and the top cover 116 can have a slit or a through hole. The embodiments of the present application do not limit the air tightness of the connection position of the first side plate 115 and the top cover 116.

[0106] In some embodiments, the conductive shell 110 can be a one-piece structure. That is, the first side plate 115 and the upper cover 116 are connected as a one-piece structure. In this way, the connection between the first side plate 115 and the upper cover 116 is better.

[0107] Exemplarily, the material of the conductive shell 110 includes a conductive material, which can include copper, aluminum, stainless steel, brass, alloys thereof, and the like. The embodiments of the present application do not limit this.

[0108] Figure 4 A structural schematic diagram of a first side plate 115 and a radiation structure 120 is provided in the embodiments of the present application. Please refer to Figure 4 The first slit 101 extends in a straight line, in other words, the extension path of the first slit 101 is a straight line. The second slit 102 extends in a straight line.

[0109] Figure 4 In the above example, the extension direction of the first slit 101 and the extension direction of the second slit 102 are parallel. In this way, the problem of pattern tilt of the antenna 100 can be improved, and the gain of the electromagnetic wave radiated by the antenna 100 in each direction is relatively high.

[0110] The extension direction of the first slit 101 can also be referred to as the length direction of the first slit 101. The extension direction of the second slit 102 is the same.

[0111] Figure 4 In the example of the above, the radiation structure 120 is a rectangular sheet structure. In this way, the radiation structure 120 can be regarded as a planar radiation end of a PIFA antenna.

[0112] In some embodiments of the present application, the extension path of the first slit 101 can be a curve, for example, the first slit 101 is S-shaped. Similarly, the extension path of the second slit 102 can be a curve.

[0113] In addition, in some embodiments, the extension direction of the first slit 101 and the extension direction of the second slit 102 can not be parallel. In these embodiments, the antenna 100 also has the advantages of wide bandwidth and high gain.

[0114] Exemplarily, the included angle between the extension direction of the first slit 101 and the extension direction of the second slit 102 can be 0°-70°. For example, the included angle between the extension direction of the first slit 101 and the extension direction of the second slit 102 can be 0°, 2°, 5°, 10°, 15°, 20°, 30°, 40°, 45°, 50°, 60°, or 70°, and the like.

[0115] Figure 4In the example shown in FIG. 1, the radiation structure 120 includes a first conductive part 123, a second conductive part 124, and a ring-shaped slot 125. The ring-shaped slot 125 is annularly arranged at the outer periphery of the first conductive part 123. The ring-shaped slot 125 is arranged between the first conductive part 123 and the second conductive part 124. In other words, the ring-shaped slot 125 divides the radiation structure 120 into the first conductive part 123 and the second conductive part 124, and the second conductive part 124 is arranged at the outer periphery of the first conductive part 123. The first conductive part 123 serves as a feed end of the antenna 100, and one end of the second conductive part 124 is electrically connected to the conductive shell 110. The first slot 101 and the second slot 102 are respectively located at two sides of the second conductive part 124.

[0116] In this way, after the first conductive part 123 serving as the feed end of the antenna 100 receives excitation, the first conductive part 123 is coupled to the second conductive part 124 through the ring-shaped slot 125, and the second conductive part 124 radiates electromagnetic waves, which are re-excited to radiate electromagnetic waves after propagating to the inner cavity 113, thereby facilitating improvement of the bandwidth of the antenna 100.

[0117] The ring-shaped slot 125 described above refers to a slot that is connected at the beginning and the end to form a ring. The embodiments of the present application do not limit the shape of the ring-shaped slot 125. For example, the ring-shaped slot 125 can be a circular ring, a polygonal ring, an elliptical ring, a curved ring, or the like. The polygon described above can be a triangle, a quadrilateral, a pentagon, a hexagon, or the like. In the embodiments in which the ring-shaped slot 125 is a circular ring or a polygonal ring, the current distribution on the second conductive part 124 is uniform, and the circular degree of the antenna 100 can be improved.

[0118] In some embodiments of the present application, the first slot 101 and the second slot 102 are symmetric about the center of the ring-shaped slot 125. In this way, the uniformity of the current on the second conductive part 124 can be further improved, and the circular degree of the antenna 100 is facilitated.

[0119] In the embodiments in which the ring-shaped slot 125 is an irregular figure, the center of the ring-shaped slot 125 refers to the center of the circumscribed circle of the ring-shaped slot 125.

[0120] In some embodiments, the first slot 101 and the second slot 102 can not be symmetric about the center of the ring-shaped slot 125. For example, the distance from the first slot 101 to the center of the ring-shaped slot 125 is greater than the distance from the second slot 102 to the center of the ring-shaped slot 125.

[0121] In some embodiments of the present application, the radiation structure 120 can not include the ring-shaped slot 125 described above. For example, the radiation structure 120 is a one-piece component.

[0122] The embodiments of the present application do not limit the shape of the first end 121 of the radiation structure 120 and the conductive shell 110 (for example, the first end 121 of the radiation structure 120 can be a circular end, a polygonal end, an elliptical end, a curved end, or the like). Figure 3The connection manner of the first end 121 of the radiation structure 120 and the conductive shell 110 is not limited. For example, the first end 121 of the radiation structure 120 and the conductive shell 110 are connected by a solder layer, a conductive glue layer or the like.

[0123] In some embodiments, the first end 121 of the radiation structure 120 and the first side plate 115 are connected as an integral part. In this way, the radiation structure 120 and the first side plate 115 can be formed by the same process. For example, the radiation structure 120 and the first side plate 115 are formed by a printed circuit board, which is advantageous to simplify the manufacturing process of the antenna.

[0124] The relative position of the radiation structure 120 and the first side plate 115 is not limited in the embodiments of the present application. The radiation structure 120 can be connected to the end of the first side plate 115, or the radiation structure 120 can be connected to the middle of the first side plate 115.

[0125] In some embodiments of the present application, the distance from the first slot 101 to one end of the conductive shell is equal to the distance from the second slot 102 to the other end of the conductive shell. In other words, the distance d1 from the first slot 101 to one end of the first side plate 115 is equal to the distance d2 from the second slot 102 to the other end of the first side plate 115. In this way, it is advantageous to uniformly distribute the current on the first side plate 115 and improve the circularity of the antenna 100.

[0126] For example, the distance d1 is the distance from the midpoint of the first slot 101 along the length direction of the first slot 101 to one end of the first side plate 115. The distance d2 is the distance from the midpoint of the second slot 102 along the length direction of the second slot 102 to the other end of the first side plate 115.

[0127] It can be understood that the aforementioned distance d1 equal to the distance d2 allows the existence of manufacturing errors and assembly errors. In addition, in some embodiments of the present application, the aforementioned distance d1 and the distance d2 can not be equal. For example, the distance d1 and the distance d2 are 0.8 times-1.2 times.

[0128] Please return Figure 3 In some embodiments of the present application, the antenna 100 can further include a dielectric layer 130 connected to the surface of the radiation structure 120 away from the inner cavity 113. Since the dielectric constant of the dielectric layer 130 is greater than the dielectric constant of air, the setting of the dielectric layer 130 can shorten the electrical length of the antenna 100 and reduce the size of the antenna 100.

[0129] For example, the dielectric layer 130 and the surface of the radiation structure 120 away from the inner cavity 113 can be connected by a glue layer. In some embodiments, the radiation structure 120 is formed on the surface of the dielectric layer 130 by a printed circuit board process.

[0130] Exemplarily, the material of the dielectric layer 130 is FR-4 grade material, and the relative dielectric constant of the dielectric layer 130 is 4.4.

[0131] In some embodiments of the present application, the dielectric layer 130 can be connected to the surface of the conductive shell 110 away from the inner cavity 113.

[0132] In some embodiments of the present application, the dielectric layer 130 can be located in the inner cavity 113. In this way, the electrical length of the antenna 100 can be shortened, and the size of the antenna 100 can be reduced.

[0133] Figure 3 In an example of the antenna 100, the antenna 100 further includes a feed line 140. The feed line 140 includes a signal line 141 and a ground line 142. The signal line 141 is connected to the radiating structure 120, and the ground line 142 is connected to the conductive shell 110. The feed line 140 is used to transmit an electrical signal, and the radiating structure 120 and the conductive shell 110 radiate electromagnetic waves.

[0134] Embodiments of the present application do not limit the type of the feed line 140. In some embodiments, the feed line 140 is a coaxial cable. The ground line 142 can be regarded as an outer conductor of the coaxial cable, and the signal line 141 can be regarded as an inner conductor of the coaxial cable. Exemplarily, the signal line 141 and the radiating structure 120 can be connected by a solder layer, conductive glue or the like. The ground line 142 and the conductive shell 110 can be connected by a solder layer, conductive glue or the like.

[0135] Embodiments of the present application do not limit the connection position of the ground line 142 and the conductive shell 110. In some embodiments, the ground line 142 is connected to the first side plate 115.

[0136] In some embodiments, the conductive shell 110 includes oppositely arranged first and second side plates 115 and 117, and the second side plate 117 is a part of the aforementioned upper cover 116. The ground line 142 is connected to the second side plate 117. In this way, the roundness of the antenna 100 can be improved, and the directivity of the antenna 100 can be more symmetrical.

[0137] In some embodiments of the present application, the connection position of the ground line 142 and the second side plate 117 is located in the projection of the surface of the first side plate 115 in the radiating structure 120. In other words, the connection position of the ground line 142 and the second side plate 117 is oppositely arranged with the radiating structure 120.

[0138] Figure 3 In an example of the antenna 100, the signal line 141 penetrates the second side plate 117 and the radiating structure 120 to be connected to the radiating structure 120. The signal line 141 and the second side plate 117 are electrically isolated. In other embodiments, the signal line 141 can extend to the radiating structure 120 through the outer side of the conductive shell 110 to be connected to the radiating structure 120.

[0139] In some embodiments of this application, the thickness of the conductive housing 110 can be further reduced to decrease the size of the antenna 100. The following is in conjunction with... Figure 5a , Figure 5b , Figure 6a and Figure 6b An example is provided.

[0140] Figure 5a This is a schematic diagram of another antenna 100 provided in an embodiment of this application. Figure 5b and Figure 2 The differences include: antenna 100 may also include conductive box 200. Figure 5b Please refer to the foregoing for the radiation structure 120 and the conductive housing 110. Figure 2 The description in the text will not be repeated here.

[0141] Figure 5b for Figure 5a The exploded view of the antenna 100 shown. Figure 5b In the example, the conductive box 200 includes a third opening 201 and a cavity 202, which are connected. The third opening 201 is opposite to the first opening 111. The conductive box 200 is coupled to the conductive housing 110. The dimension of the third opening 201 along a first direction is not equal to the dimension of the first opening 111 along the first direction. The vertical projections of the first opening 111 and the third opening 201 onto the surface of the first opening 111 at least partially overlap.

[0142] Thus, the cavity 202 can provide secondary excitation to the electromagnetic waves radiated by the inner cavity 113, further enhancing the bandwidth of the antenna 100. Since the dimensions of the third opening 201 along the first direction are not equal to those of the first opening 111 along the first direction, the frequency bands of the electromagnetic waves radiated by the inner cavity 113 and the electromagnetic waves radiated by the conductive shell 110 do not completely overlap, thereby broadening the bandwidth of the antenna 100.

[0143] Furthermore, the arrangement of the conductive box 200 helps to reduce the internal cavity 113 of the conductive housing 110, and a smaller internal cavity 113 is sufficient to excite electromagnetic waves. This is beneficial for reducing the size of the conductive housing 110, and especially for reducing the thickness of the conductive housing 110.

[0144] The thickness of the aforementioned conductive housing 110 refers to the dimension of the conductive housing 110 along the direction perpendicular to the radiating structure 120.

[0145] The aforementioned third opening 201 and first opening 111 are opposite to each other, meaning that the third opening 201 is located on the side of the conductive box 200 near the conductive housing 110, and the first opening 111 is located on the side of the conductive housing 110 near the conductive box 200.

[0146] In some embodiments of the present application, the depth of the cavity 202 and the depth of the inner cavity 113 are both greater than the distance from the first opening 111 to the third opening 201. In this way, the cavity 202 is more likely to receive the electromagnetic waves radiated by the inner cavity 113 and achieve secondary excitation. The coupling performance of the conductive box 200 and the conductive shell 110 is good, and the gain of the antenna 100 is improved.

[0147] The depth of the aforementioned cavity 202 refers to the size of the cavity 202 along the direction in which the third opening 201 is formed. The depth of the inner cavity 113 is the same.

[0148] In some embodiments of the present application, the ratio of the size of the third opening 201 along the first direction to the size of the first opening 111 along the first direction is 0.7-1.2. In this way, the wavelength band of the electromagnetic waves radiated by the cavity 202 after excitation is similar to the wavelength band of the electromagnetic waves radiated by the inner cavity 113 after excitation, which is beneficial to widening the bandwidth of the antenna 100, and the antenna 100 has a higher gain within the bandwidth.

[0149] For example, the ratio of the size of the third opening 201 along the first direction to the size of the first opening 111 along the first direction can be 0.7, 0.8, 0.9, 1.0, 1.1 or 1.2, etc.

[0150] In some embodiments of the present application, the midpoint of the third opening 201 along the first direction and the midpoint of the first opening 111 along the first direction are collinear. In other words, in the first direction, the geometric center of the third opening 201 and the geometric center of the first opening 111 are close to zero in distance in the first direction. In this way, the inner cavity 113 can better receive the excitation radiated by the first opening 111, which is beneficial to secondary excitation.

[0151] The aforementioned geometric center of the third opening 201 refers to the center of the circle circumscribed by the third opening 201. The geometric center of the first opening 111 is the same.

[0152] In some embodiments of the present application, the distance between the geometric center of the third opening 201 and the geometric center of the first opening 111 in the first direction can be 0.1 times λ-2 times λ. In this way, the conductive shell 110 and the conductive box 200 can still be better coupled. For example, the distance between the geometric center of the third opening 201 and the geometric center of the first opening 111 in the first direction can be 0.1 times λ, 0.2 times λ, 0.5 times λ, 0.8 times λ, 1 times λ, 1.2 times λ, 1.5 times λ, 1.8 times λ or 2 times λ, etc.

[0153] The embodiments of the present application do not limit the shape of the conductive box 200, the shape of the cavity 202 and the shape of the third opening 201. Please refer to the description of the aforementioned conductive shell 110, inner cavity 113 and first opening 111, which will not be repeated here.

[0154] In some embodiments of this application, a dielectric layer 130 may also be disposed inside the cavity 202, or a dielectric layer 130 may also be disposed outside the conductive box 200.

[0155] Figure 5b In this example, the dielectric layer 130 is partially located inside the cavity 202 and partially located outside the cavity 202. The dielectric layer 130 divides the conductive box 200 into a cover 021 and a base plate 022. In other words, the conductive box 200 includes a cover 021 and a base plate 022. The base plate 022 and the cover 021 are located on opposite sides of the dielectric layer 130. The cover 021 and the base plate 022 are electrically connected.

[0156] In some embodiments of this application, the dielectric layer 130 located in the cavity 202 and the dielectric layer 130 located in the inner cavity 113 are connected as an integral molded part.

[0157] This application does not limit the manufacturing process of the conductive box 200. For example, the manufacturing process of the conductive box 200 is the same as that of the conductive shell 110.

[0158] Figure 6a This is a schematic diagram of another antenna 300 provided in an embodiment of this application. Figure 6a In the example, antenna 300 includes a conductive housing 210 and a radiating structure 220. The conductive housing 210 is used for grounding. The conductive housing 210 includes an inner cavity 211, an opening 212, a first slot 301, and a second slot 302. The size of the opening 212 along a first direction is greater than or equal to 1 times λ; λ is the corresponding dielectric waveguide wavelength.

[0159] In the embodiments of this application, the shape and size of the inner cavity 211, the shape and size of the opening 212, and the size and outer wall shape of the conductive housing 210 are described in the foregoing. Figure 3 The relevant descriptions of the inner cavity 113, the first opening 111, and the conductive shell 110 will not be repeated here.

[0160] Figure 6b for Figure 6a The diagram shows an exploded view of antenna 300. Please refer to [link / reference]. Figure 6b The conductive housing 210 includes a plurality of first slits 301, which are spaced apart along the length of the first slits 301. The radiating structure 220 is coupled through a second slit 302 on the conductive housing 210. The second slit 302 is disposed around the outer periphery of the radiating structure 220, and both ends of the second slit 302 are connected to the opening 212.

[0161] and Figure 2The antenna 300 is similar to the antenna 100. After the antenna 100 receives the excitation, the radiating structure 220 radiates electromagnetic wave signals of a first frequency band. The inner cavity 211 of the conductive shell 210 radiates electromagnetic wave signals of a second frequency band. If the first frequency band and the second frequency band are close to each other, a wideband is formed. If the first frequency band and the second frequency band are far from each other, a dual-frequency signal is formed. The performance of the antenna 300 is improved. The inner cavity 211 radiates electromagnetic waves with good omnidirectionality, and the antenna 300 has good directivity circularity.

[0162] In addition, the plurality of first slits 301 are arranged to reduce the size of the inner cavity 211 of the conductive shell 210. A smaller inner cavity can excite electromagnetic waves. The size of the conductive shell 210 is reduced, and in particular, the thickness of the conductive shell 210 is reduced.

[0163] For example, the length of the first slit 301 is 0.3 times λ-0.5 times λ. For example, the length of the first slit 301 is 0.3 times λ, 0.35 times λ, 0.4 times λ, 0.45 times λ, 0.46 times λ, 0.48 times λ, or 0.5 times λ. The first slit 301 receives excitation from the radiating structure 220 and radiates electromagnetic waves into space.

[0164] Figure 6b In an example, the antenna 300 includes a dielectric layer 230 connected to the surface of the radiating structure 220 close to the inner cavity 211. The dielectric layer 230 can shorten the electrical length of the antenna 100. In addition, the radiating structure 220, the dielectric layer 230, and the conductive shell 210 can be regarded as a microstrip antenna. The plurality of first slits 301 can be regarded as a slot antenna or a slit antenna. The microstrip antenna can excite the slit antenna to generate electromagnetic waves.

[0165] Figure 6b In an example, the dielectric layer 230 extends out of the inner cavity 211. In other words, part of the dielectric layer 230 is located in the inner cavity 211, and another part is located outside the inner cavity 211.

[0166] In some embodiments of the present application, the dielectric layer 230 can be connected to the surface of the radiating structure 220 away from the inner cavity 211. The electrical length of the antenna 100 can also be shortened.

[0167] In an embodiment of the present application, the conductive shell 210 is a cuboid, and the length direction of the first slit 301 is parallel to the length direction of the cuboid. The second slit 302 is an arc-shaped slit, and both ends of the arc-shaped slit extend to and communicate with the opening 212.

[0168] Figure 6bIn the example, both the first slot 301 and the second slot 302 are located on the same surface of the conductive housing 110. This improves the coupling efficiency between the first slot 301 and the radiating structure 220, thereby increasing the gain of the antenna 300.

[0169] Figure 6b In the example, along the length direction of the first slot 301, one of the multiple first slots 301 is connected to the second slot 302. This further improves the coupling efficiency between the first slot 301 and the radiating structure 220, thereby increasing the gain of the antenna 300.

[0170] Figure 6b In the example, along the length direction of the first gap 301, two of the multiple first gaps 301 are connected to the two sides of the second gap 302 respectively.

[0171] As mentioned above Figure 3 Similarly, in some embodiments, antenna 300 may also include feed line 140, which includes signal line 141 and ground line 142.

[0172] In some embodiments, the surface of the conductive housing 210 opposite to the radiating structure 220 is connected to the ground line 142. The signal line 141 is connected to the radiating structure 220.

[0173] As mentioned above Figure 3 Similarly, in some embodiments, the antenna 300 may also include a dielectric layer, and the connection relationship between the dielectric layer and the conductive housing 210 is described above. Figure 3 The description in the text will not be repeated here.

[0174] Figure 6a In the antenna 300, the radiating structure 220 includes a first segment 221, a second segment 222, and a third segment 223 connected in sequence. The end of the third segment 223 furthest from the second segment 222 is positioned near the opening 212. The first segment 221 is a circular sheet structure, the second segment 222 is a rectangular sheet structure, and the second segment 222 is a rectangular sheet structure. The width of the third segment 223 is greater than the width of the second segment 222. The first segment 221 serves as the feed end of the radiating structure 220. Thus, the third segment 223 serves as the radiating end of the antenna 300. The inner cavity 211 can perform secondary excitation of the electromagnetic waves radiated by the third segment 223, which helps to broaden the bandwidth of the antenna 300.

[0175] In other embodiments of this application, the radiation structure 220 may be of other shapes, not limited to... Figure 6a The shape in the middle.

[0176] The antenna 100 (300) provided in this application embodiment has advantages such as wide bandwidth, high gain, good roundness, horizontal polarization or horizontal omnidirectional radiation.

[0177] The following combination Figure 7 , Figure 8 , Figure 9 and Figure 10 right Figure 2 The performance of the antenna 100 shown is illustrated by way of example.

[0178] Figure 7 for Figure 2 The diagram shows the S11 parameters of antenna 100. From... Figure 7 It can be seen that within the resonant frequency range of 5.12GHz-6.09GHz, the resonance values ​​shown by the S11 parameters are all less than -10dB, indicating lower return loss of the antenna assembly. This suggests that the impedance bandwidth of the antenna assembly is within the range of 5.12GHz-6.09GHz.

[0179] Figure 8 for Figure 2 The antenna 100 shown has a 3D radiation pattern at 5.3 GHz. Figure 9 for Figure 2 The antenna 100 shown has a 3D radiation pattern at 5.5 GHz. Figure 10 for Figure 2 The 3D radiation pattern of antenna 100 at 5.8 GHz is shown. Figures 8-10 As can be seen, at frequencies of 5.3GHz, 5.5GHz, and 5.8GHz, the antenna exhibits high pattern gain, good pattern roundness, and good omnidirectional characteristics.

[0180] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0181] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An antenna (100), characterized in that, The antenna (100) includes: A conductive housing (110) for grounding includes an inner cavity (113), a first opening (111), and a second opening (112); both the first opening (111) and the second opening (112) communicate with the inner cavity (113); the dimension of the first opening (111) along a first direction is greater than or equal to 1 times λ; λ is the dielectric waveguide wavelength corresponding to the center frequency of the antenna (100); and A radiating structure (120) is electrically connected at one end to the conductive housing (110); the radiating structure (120) covers a portion of the second opening (112) and forms a first gap (101) and a second gap (102) with the conductive housing (110); along the extending direction of the first gap (101), the first gap (101) communicates with the first opening (111); along the extending direction of the second gap (102), the second gap (102) communicates with the first opening (111).

2. The antenna (100) according to claim 1, characterized in that, The vertical projection of the inner wall of the conductive housing (110) onto the surface of the first opening (111) is located within the first opening (111).

3. The antenna (100) according to claim 1 or 2, characterized in that, The conductive housing (110) includes a connected bottom wall (103) and a side wall (104), the bottom wall (103) being opposite to the first opening (111), and the first gap (101) and the second gap (102) being located on the side wall (104).

4. The antenna (100) according to any one of claims 1-3, characterized in that, The extension direction of the first gap (101) is parallel to the extension direction of the second gap (102).

5. The antenna (100) according to any one of claims 1-4, characterized in that, The radiation structure (120) includes a first conductive part (123), a second conductive part (124) and an annular gap (125). The annular gap (125) is arranged around the outer periphery of the first conductive part (123) and is disposed between the first conductive part (123) and the second conductive part (124). The first conductive part (123) serves as the feed terminal of the antenna (100), and one end of the second conductive part (124) is electrically connected to the conductive housing (110).

6. The antenna (100) according to claim 5, characterized in that, The first slit (101) and the second slit (102) are symmetrical about the center of the annular slit (125).

7. The antenna (100) according to claim 5 or 6, characterized in that, The annular gap (125) is a circular ring or a polygonal ring.

8. The antenna (100) according to any one of claims 1-7, characterized in that, The antenna (100) further includes: a dielectric layer (130); The dielectric layer (130) is located within the inner cavity (113); or, the dielectric layer (130) is connected to the surface of the radiation structure (120) away from the inner cavity (113).

9. The antenna (100) according to any one of claims 1-8, characterized in that, The conductive housing (110) is elongated.

10. The antenna (100) according to claim 9, characterized in that, Along the length of the conductive housing (110), the distance from the first gap (101) to one end of the conductive housing (110) is equal to the distance from the second gap (102) to the other end of the conductive housing (110).

11. The antenna (100) according to any one of claims 1-10, characterized in that, The antenna (100) further includes a feed line (140), which includes a signal line (141) and a ground line (142), and the signal line (141) is connected to the radiating structure (120). The conductive housing (110) includes a first side plate (115) and a second side plate (117) disposed opposite to each other. The first gap (101) and the second gap (102) are both located on the first side plate (115), and the ground wire (142) is connected to the second side plate (117).

12. The antenna (100) according to any one of claims 1-11, characterized in that, The antenna (100) also includes: A conductive box (200) includes a communicating cavity (202) and a third opening (201); the size of the third opening (201) along the first direction is not equal to the size of the first opening (111) along the first direction; the first opening (111) and the third opening (201) are opposite to each other, and the conductive shell (110) and the conductive box (200) are coupled. The vertical projections of the first opening (111) and the third opening (201) onto the surface of the first opening (111) at least partially overlap.

13. The antenna (100) according to claim 12, characterized in that, The depth of the cavity (202) and the depth of the inner cavity (113) are both greater than the distance from the first opening (111) to the third opening.

14. An antenna (300), characterized in that, The antenna (300) includes: A conductive housing (210) for grounding, the conductive housing (210) includes a communicating cavity (211) and an opening (212), the size of the opening (212) along a first direction is greater than or equal to 1 times λ; λ is the dielectric waveguide wavelength corresponding to the center frequency of the antenna (300); The conductive housing (210) further includes a plurality of first slits (301), the plurality of first slits (301) being spaced apart along the length direction of the first slits (301); and A radiating structure (220) is coupled to the conductive housing (210) through a second gap (302). The second gap (302) is arranged around the outer periphery of the radiating structure (220), and both ends of the second gap (302) are connected to the opening.

15. The antenna (300) according to claim 14, characterized in that, Along the length direction of the first gap (301), one of the plurality of first gaps (301) is connected to the second gap (302).

16. A network device (10), characterized in that, The network device (10) includes: a housing (12) and an antenna as described in any one of claims 1-15, the antenna being disposed within the housing (12).

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