Antenna and communication equipment

Abstract

The invention discloses an antenna and communication equipment, and aims to reduce the loss of the antenna and further improve the gain of the antenna under the condition of ensuring the high directivity of the antenna. The antenna comprises a reflecting plate, a resonator, a radiator and an enclosure frame, and the resonator is arranged on one side of the reflecting plate and used for filtering signals of the antenna; the radiator is arranged on one side, deviating from the reflecting plate, of the resonator, and the radiator is electrically connected with the resonator; the enclosure frame is arranged on the side, the same as the resonator, of the reflecting plate, the enclosure frame and the reflecting plate form a containing space for containing the resonator and the radiator, and the enclosure frame is provided with a metal surface.

Description

Antenna and communication equipment Technical Field

[0001] The present application relates to the field of antenna technology, and in particular to an antenna and communication equipment. Background Art

[0002] With the development of modern wireless communication technology, communication systems are becoming increasingly miniaturized, integrated, and multifunctional. Accordingly, communication equipment has increasingly higher requirements for radio frequency links.

[0003] The antenna subsystem is a critical component of the RF chain. The gain of the antenna subsystem is equal to the directivity of a single-channel antenna minus the insertion loss. Therefore, to achieve high gain, the antenna must have both high directivity and low loss. Existing antenna subsystem solutions typically use a power splitter network and multiple antenna elements to form a multi-element antenna array. While this approach achieves high directivity, the introduction of the power splitter network introduces additional insertion loss, which effectively prevents the antenna gain from being significantly improved.

[0004] Summary of the Invention

[0005] The present application provides an antenna and a communication device to reduce antenna loss and thereby increase antenna gain while ensuring high directivity of the antenna.

[0006] In a first aspect, the present application provides an antenna, which may include a reflector, a resonator, a radiator, and a frame. The resonator may be disposed on one side of the reflector to filter the antenna signal. The radiator may be disposed on the side of the resonator facing away from the reflector and electrically connected to the resonator. The radiator may have both the antenna radiation function and the frequency selection function of the filter. The frame may be disposed on the same side of the reflector as the resonator, and a housing space for accommodating the resonator and the radiator may be formed between the frame and the reflector. The frame may have a metal surface. By utilizing the reflection of electromagnetic waves by the metal surface, the phase of the electromagnetic waves radiated or received by the radiator may be changed, so that the phase of the electromagnetic waves on the antenna aperture surface is close to the same, thereby achieving high directivity of the antenna.

[0007] The antenna provided in this application can achieve high directivity through the frame while only having a single radiator, thus eliminating the need for a power splitter network and reducing the antenna's insertion loss. Because the antenna provided in this application can reduce loss while achieving high directivity, it can also achieve the effect of increasing gain.

[0008] In some possible implementations, the antenna may further include a metal sheet, which may be fixed to a side of the frame facing away from the reflector to improve the cross-polarization performance of the antenna.

[0009] In some possible embodiments, a first extension portion and a second extension portion may be provided on opposite sides of the metal sheet, respectively. The first extension portion and the second extension portion are respectively fixedly connected to two opposite side walls of the surrounding frame, thereby fixing the metal sheet to the surrounding frame.

[0010] In some possible implementations, the antenna may further include a first baffle and a second baffle, which are disposed opposite each other on the reflector and on the same side as the resonator. The first baffle and the second baffle are respectively located outside the frame. The first baffle and the second baffle may each have a metal surface to enhance the effect of the frame on adjusting the amplitude and phase of the electromagnetic wave.

[0011] In some possible embodiments, the antenna may also include a phase adjustment structure, which may be arranged on the side of the frame facing away from the reflector. The phase adjustment structure may also be used to adjust the phase of the antenna signal so that the antenna signal is close to the desired phase distribution on its aperture plane, thereby further improving the directivity of the antenna.

[0012] In some possible implementations, the phase adjustment structure may include a dielectric substrate and a metal pattern disposed on the surface of the dielectric substrate. By properly designing the shape of the metal pattern and utilizing its reflection of electromagnetic waves, the phase of the electromagnetic waves can be adjusted when the radiator radiates or receives electromagnetic waves.

[0013] Exemplarily, the metal pattern may be provided on a side of the dielectric substrate facing the reflective plate, or may be provided on a side of the dielectric substrate facing away from the reflective plate.

[0014] Furthermore, in the above scheme, the number of phase adjustment structures can be one or more, and the one or more phase adjustment structures can be arranged sequentially in a direction away from the reflector. By designing the metal pattern transmission phase on the one or more phase adjustment structures, the electromagnetic waves on the antenna aperture plane can be adjusted to have equal phases, thereby achieving high directivity of the antenna.

[0015] In some other possible embodiments, the phase adjustment structure can also be made of a full dielectric material. In this case, the phase adjustment structure may include multiple regions with different thicknesses in a direction perpendicular to the reflector to achieve the phase adjustment of the electromagnetic waves radiated or received by the radiator.

[0016] In the above scheme, the thickness of the phase adjustment structure decreases perpendicular to the reflector from its center toward its edge. This thickness distribution of the phase adjustment structure can effectively adjust the phase of electromagnetic waves, helping to further improve the directivity of the antenna.

[0017] In some possible implementations, the radiator may be a dielectric resonator, and in this case, the radiator may be formed of a microwave dielectric material with a high dielectric constant.

[0018] In the above embodiment, the radiator's surface facing away from the resonator may be metal-plated. The metal coating may partially or completely cover this surface, thereby adjusting the radiator's resonant frequency. Furthermore, the radiator's surface facing the resonator may also be metal-plated. In this way, the metal coating on the radiator's surface and the metal coating on the resonator's surface can be sintered together to achieve relative fixation between the two.

[0019] In some other possible implementations, the radiator may also be a microstrip resonator. In a specific implementation, the microstrip resonator may be fixed to the resonator by welding.

[0020] In some possible embodiments, the resonator may be a dielectric resonator, in which case the resonator may be formed of a microwave dielectric material with a high dielectric constant. The resonator may include one or more resonant cavities, each of which may provide first-order filter suppression capability for the antenna.

[0021] In other possible implementations, the resonator can be a metal cavity resonator, which includes a metal housing and a metal resonant rod disposed within the housing. This type of resonator can increase the gap between the antenna's main mode resonant frequency and its higher-order mode resonant frequencies, thereby improving the resonator's high-end rejection performance.

[0022] In some possible embodiments, the number of resonators can be one or more, and one or more resonators can be stacked in a direction away from the reflector, which helps provide the antenna with more orders of filtering capabilities, thereby improving the radiation performance of the antenna.

[0023] In some possible implementation schemes, the radiator and the resonator can be electrically connected through a probe; alternatively, the radiator and the resonator can be coupled through a gap. In this case, a first gap may be provided on a side of the radiator facing the resonator, and a second gap may be provided on a side of the resonator facing the radiator. The first gap and the second gap are positioned opposite to each other, and energy coupling is achieved between the radiator and the resonator through the first gap and the second gap.

[0024] In a second aspect, the present application further provides an antenna, which may include a reflector, a resonator, a radiator, and a phase adjustment structure. The resonator may be arranged on one side of the reflector to filter the antenna signal. The radiator may be arranged on the side of the resonator facing away from the reflector and electrically connected to the resonator. The radiator may have both the antenna radiation function and the frequency selection function of the filter. The phase adjustment structure is arranged on the side of the radiator facing away from the reflector. The phase adjustment structure can be used to adjust the phase of the antenna signal so that the antenna signal is close to the desired phase distribution on its aperture plane, thereby improving the directivity of the antenna.

[0025] The antenna provided in this application can achieve high directivity through a phase adjustment structure while only having a single radiator. This eliminates the need for a power splitter network, reducing the antenna's insertion loss. Because the antenna provided in this application can reduce loss while achieving high directivity, it can also achieve the effect of increasing gain.

[0026] In some possible implementations, the phase adjustment structure may include a dielectric substrate and a metal pattern disposed on the surface of the dielectric substrate. By properly designing the shape of the metal pattern and utilizing its reflection of electromagnetic waves, the phase of the electromagnetic waves can be adjusted when the radiator radiates or receives electromagnetic waves.

[0027] Exemplarily, the metal pattern may be provided on a side of the dielectric substrate facing the reflective plate, or may be provided on a side of the dielectric substrate facing away from the reflective plate.

[0028] Furthermore, in the above scheme, the number of phase adjustment structures can be one or more, and the one or more phase adjustment structures can be arranged sequentially in a direction away from the reflector. By designing the metal pattern transmission phase on the one or more phase adjustment structures, the electromagnetic waves on the antenna aperture plane can be adjusted to have equal phases, thereby achieving high directivity of the antenna.

[0029] In some other possible embodiments, the phase adjustment structure can also be made of a full dielectric material. In this case, the phase adjustment structure may include multiple regions with different thicknesses in a direction perpendicular to the reflector to achieve the phase adjustment of the electromagnetic waves radiated or received by the radiator.

[0030] In the above scheme, the thickness of the phase adjustment structure decreases perpendicular to the reflector from its center toward its edge. This thickness distribution of the phase adjustment structure can effectively adjust the phase of electromagnetic waves, helping to further improve the directivity of the antenna.

[0031] In some possible implementations, the antenna may further include a frame, which may be positioned between the reflector and the phase adjustment structure. A space may be formed between the frame and the reflector to accommodate the resonator and radiator. The frame has a metal surface, and the reflection of electromagnetic waves by the metal surface can change the phase of the electromagnetic waves radiated or received by the radiator, making the phase of the electromagnetic waves on the antenna aperture nearly consistent, thereby further improving the antenna's high directivity.

[0032] In some possible implementations, the antenna may further include a metal sheet, which may be fixed to a side of the frame facing away from the reflector to improve the cross-polarization performance of the antenna.

[0033] In some possible embodiments, a first extension portion and a second extension portion may be provided on opposite sides of the metal sheet, respectively. The first extension portion and the second extension portion are respectively fixedly connected to two opposite side walls of the surrounding frame, thereby fixing the metal sheet to the surrounding frame.

[0034] In some possible implementations, the antenna may further include a first baffle and a second baffle, which are disposed opposite each other on the reflector and on the same side as the resonator. The first baffle and the second baffle are respectively located outside the frame. The first baffle and the second baffle may each have a metal surface to enhance the effect of the frame on adjusting the amplitude and phase of the electromagnetic wave.

[0035] In some possible implementations, the radiator may be a dielectric resonator, and in this case, the radiator may be formed of a microwave dielectric material with a high dielectric constant.

[0036] In the above embodiment, the radiator's surface facing away from the resonator may be metal-plated. The metal coating may partially or completely cover this surface, thereby adjusting the radiator's resonant frequency. Furthermore, the radiator's surface facing the resonator may also be metal-plated. In this way, the metal coating on the radiator's surface and the metal coating on the resonator's surface can be sintered together to achieve relative fixation between the two.

[0037] In some other possible implementations, the radiator may also be a microstrip resonator. In a specific implementation, the microstrip resonator may be fixed to the resonator by welding.

[0038] In some possible embodiments, the resonator may be a dielectric resonator, in which case the resonator may be formed of a microwave dielectric material with a high dielectric constant. The resonator may include one or more resonant cavities, each of which may provide first-order filter suppression capability for the antenna.

[0039] In other possible implementations, the resonator can be a metal cavity resonator, which includes a metal housing and a metal resonant rod disposed within the housing. This type of resonator can increase the gap between the antenna's main mode resonant frequency and its higher-order mode resonant frequencies, thereby improving the resonator's high-end rejection performance.

[0040] In some possible embodiments, the number of resonators can be one or more, and one or more resonators can be stacked in a direction away from the reflector, which helps provide the antenna with more orders of filtering capabilities, thereby improving the radiation performance of the antenna.

[0041] In some possible implementation schemes, the radiator and the resonator can be electrically connected through a probe; alternatively, the radiator and the resonator can be coupled through a gap. In this case, a first gap may be provided on a side of the radiator facing the resonator, and a second gap may be provided on a side of the resonator facing the radiator. The first gap and the second gap are positioned opposite to each other, and energy coupling is achieved between the radiator and the resonator through the first gap and the second gap.

[0042] In a third aspect, the present application further provides a communication device, which may include a baseband processing unit and the antenna according to any possible implementation of the first and second aspects, wherein the antenna is electrically connected to the baseband processing unit. Due to the improved gain of the antenna, the communication device can achieve better communication performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] FIG1 is a schematic diagram of a system architecture applicable to a communication device provided in an embodiment of the present application;

[0044] FIG2 is a schematic structural diagram of a base station;

[0045] FIG3 is a schematic diagram of the composition of an antenna system according to a possible embodiment of the present application;

[0046] FIG4 is a schematic structural diagram of an antenna provided in an embodiment of the present application;

[0047] FIG5 is a schematic structural diagram of another antenna provided in an embodiment of the present application;

[0048] FIG6 a is a filtering performance curve diagram of the antenna shown in FIG5 ;

[0049] FIG6 b is a graph showing the radiation performance of the antenna shown in FIG5 ;

[0050] FIG7 is a schematic structural diagram of another antenna provided in an embodiment of the present application;

[0051] FIG8 is a schematic structural diagram of another phase adjustment structure provided in an embodiment of the present application;

[0052] FIG9 is a schematic structural diagram of another antenna provided in an embodiment of the present application;

[0053] FIG10 is a schematic structural diagram of another antenna provided in an embodiment of the present application;

[0054] FIG11 is a schematic structural diagram of another antenna provided in an embodiment of the present application;

[0055] FIG12 is a schematic structural diagram of another antenna provided in an embodiment of the present application;

[0056] FIG13 is a schematic structural diagram of another antenna provided in an embodiment of the present application;

[0057] FIG14 is a schematic diagram of the structure of another antenna provided in an embodiment of the present application.

[0058] Reference numerals:

[0059] 1-active antenna unit; 11-RF processing unit; 12-antenna; 121-resonator; 122-radiator; 123-enclosing frame;

[0060] 1231 - metal sheet; 1232 - first extension portion; 1233 - second extension portion; 124 - phase adjustment structure;

[0061] 1241 - dielectric substrate; 1242 - metal pattern; 125 - baffle; 1251 - first baffle; 1252 - second baffle;

[0062] 13-reflector; 14-filter;

[0063] 2-Pole; 3-Antenna adjustment bracket; 4-Radar; 5-Baseband processing unit; 6-Cable. DETAILED DESCRIPTION

[0064] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be understood as being limited to the embodiments set forth herein. The same figure marks in the figures represent the same or similar structures, and thus their repeated description will be omitted. The words expressing position and direction described in the embodiments of the present application are all explained with reference to the accompanying drawings as examples, but changes can be made as needed, and the changes made are all included in the scope of protection of this application. The drawings in the embodiments of the present application are only used to illustrate the relative position relationship and do not represent the true proportion.

[0065] It should be noted that the following description sets forth specific details to facilitate understanding of the present application. However, the present application can be implemented in a variety of other ways than those described herein, and those skilled in the art may make similar generalizations without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0066] Figure 1 exemplarily shows a schematic diagram of a system architecture applicable to an embodiment of the present application. As shown in Figure 1, the system architecture includes a wireless access network communication device and a terminal, and wireless communication can be carried out between the communication device and the terminal. The embodiment shown in Figure 1 is explained by taking the communication device as a base station as an example. The base station can be located in a base station subsystem (base btation bubsystem, BBS), a terrestrial radio access network (UMTS terrestrial radio access network, UTRAN) or an evolved universal terrestrial radio access (E-UTRAN), and is used to provide cell coverage of wireless signals to achieve connection between the terminal device and the wireless network radio frequency end. Specifically, the base station can be a base station (base transceiver station, BTS) in a GSM or CDMA system, a base station (NodeB, NB) in a WCDMA system, an evolutionary base station (eNB or eNodeB) in a long term evolution (LTE) system, or a wireless controller in a cloud radio access network (CRAN) scenario, or the base station can also be a relay station, an access point, a vehicle-mounted device, a wearable device, a base station in a 5G network, or a base station in a future evolved public land mobile network (PLMN), etc., for example, a new wireless base station, which is not limited in the embodiments of the present application.

[0067] FIG2 shows a schematic structural diagram of a base station according to an embodiment of the present application. The base station includes an active antenna unit (AAU) 1, a mast 2, an antenna adjustment bracket 3, and other structures. The active antenna unit 1 can be disposed in an antenna cover 4. The antenna cover 4 has good electromagnetic wave penetration characteristics in terms of electrical performance and can withstand the influence of harsh external environments in terms of mechanical performance, thereby protecting the AAU from external environmental influences. The antenna cover 4 can be mounted on the mast 2 or the tower via the antenna adjustment bracket 3 to facilitate the reception or transmission of AAU signals. In addition, the communication device can also include a baseband processing unit 5, which is located at the far end of the AAU. The AAU and the baseband processing unit 5 can be connected via a cable 6.

[0068] More specifically, reference may be made to Figures 2 and 3 , where Figure 3 is a schematic diagram of the composition of an AAU according to a possible embodiment of the present application. The AAU 1 may generally include a radio frequency processing unit 11 and an antenna system. The antenna system may include one or more antennas 12, and the radio frequency processing unit 11 is connected to the feeding structure of each antenna 12. The radio frequency processing unit 11 may be used to perform frequency selection, amplification, and frequency conversion on the signal received by the antenna 12, and convert it into an intermediate frequency signal or a baseband signal and send it to the baseband processing unit 5, or the radio frequency processing unit 11 may be used to convert the intermediate frequency signal of the baseband processing unit 5 into an electromagnetic wave after up-conversion and amplification processing through the antenna 12 and send it out. The baseband processing unit 5 is connected to the radio frequency processing unit 11 and is used to process the intermediate frequency signal or baseband signal sent by the radio frequency processing unit 11.

[0069] The antenna system may also include a reflector, with one or more antennas respectively arranged on the reflector 13. In the antenna system, the frequencies of different antennas 12 may be the same or different. The reflector 13 may also be called a floor, an antenna panel or a reflecting surface, etc. When the antenna 12 receives a signal, the reflector 13 may reflect the antenna 12 signal and concentrate it on the receiving point. When the antenna 12 transmits a signal, the signal may be directed to the reflector 13 and reflected and transmitted by the reflector 13. The antenna 12 is usually placed on one side surface of the reflector 13, which not only greatly enhances the reception or transmission capability of the antenna signal, but also blocks and shields the interference of other radio waves from the back side of the reflector 13 (the back side of the reflector 13 in this application refers to the side surface opposite to the surface of the reflector 13 used to set the antenna 12) on the reception of the antenna signal.

[0070] In some embodiments, the AAU may further include a filter 14, which is connected between the antenna and the RF processing unit and is used to filter the signals transmitted or received by the antenna 12, thereby suppressing electromagnetic energy in non-working frequency bands and improving the radiation performance of the antenna 12.

[0071] For multi-channel, large-scale antenna systems consisting of multiple antennas, the aperture area allocated to each channel is determined by the number of channels and the module size. To achieve maximum coverage, the antenna corresponding to each channel must achieve maximum gain performance within a given aperture. Antenna gain is equal to the directivity (dB) of a single-channel antenna minus the insertion loss (dB). Therefore, to achieve high gain, the antenna system must have both high directivity and low loss. Existing antenna solutions typically use power splitter networks and multiple radiators to achieve multi-dimensional characteristics. While this improves antenna directivity, the introduction of the power splitter network also introduces a certain amount of insertion loss, which does not effectively improve antenna gain. Furthermore, because the antenna and filter are designed independently, they need to be cascaded together using transmission lines or matching circuits for impedance matching. However, the additional transmission lines or matching circuits not only increase the size of the entire antenna system but also incur additional insertion loss, further limiting the antenna gain improvement.

[0072] To address the above issues, the present invention provides an antenna that reduces insertion loss while achieving high directivity, thereby effectively increasing antenna gain. The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0073] FIG4 is a schematic structural diagram of an antenna 12 provided in an embodiment of the present application. Referring to FIG4 , the antenna 12 may include a reflector 13, a resonator 121, a radiator 122, a frame 123, and a phase adjustment structure 124. The resonator 121 is disposed on a side surface of the reflector 13, the radiator 122 is disposed on a side of the resonator 121 facing away from the reflector 13, and the radiator 122 is electrically connected to the resonator 121. The frame 123 may be disposed on the side of the reflector 13 where the resonator 121 and the radiator 122 are disposed, and connected to the reflector 13 to form a housing space for accommodating the resonator 121 and the radiator 122. The phase adjustment structure 124 is disposed on the side of the frame 123 facing away from the reflector 13, and the projection of the phase adjustment structure 124 on the surface of the reflector 13 may partially or completely cover the projection of the radiator 122 on the surface of the reflector 13.

[0074] In this embodiment, the reflector 13 not only reflects electromagnetic waves but also supports and secures the overall structure of the antenna 12. For example, the reflector 13 can be a metal plate or a printed circuit board (PCB), although this application does not limit this. Furthermore, the cross-sectional shape of the reflector 13 perpendicular to its thickness is not limited to the rectangular shape shown in FIG. 4 . In other embodiments, the cross-sectional shape of the reflector 13 can also be circular, oblong, or other regular or irregular shapes, although this application does not limit this.

[0075] The resonator 121 can be used as a component of the filter 14 shown in Figure 3 to filter the radio frequency signal transmitted or received by the antenna 12, thereby suppressing the electromagnetic energy in the non-working frequency band. The number of resonators 121 can be one or more, and this application does not impose any restrictions on this. For example, Figure 4 shows a case where there are two resonators 121. In this case, the two resonators 121 can be stacked in a direction away from the reflector 13. In addition, each resonator 121 can include one or more resonant cavities, and each resonant cavity can provide a first-order filter suppression capability for the antenna 12, that is, to filter the electromagnetic energy in the non-working frequency band of the antenna 12 once. Among the multiple resonators 121, the number of resonant cavities of each resonator 121 can be equal or unequal, and this application also does not impose any restrictions on this. In actual applications, the number of resonators 121 and the number of resonant cavities in the resonator 121 can be reasonably designed according to the frequency band in which the signal of the antenna 12 is located to filter out electromagnetic waves outside the frequency band.

[0076] In one possible embodiment, the resonator 121 may be a dielectric resonator. In this case, the resonator 121 may be formed of a ceramic dielectric block. For example, the main components of the ceramic dielectric block of the resonator 121 include, but are not limited to, high dielectric constant ceramics such as barium titanate (BaTiO3), barium carbonate (BaCO3), BaO-Ln2O3-TiO3-2 series microwave dielectric ceramics, or composite perovskite series microwave dielectric ceramics. It should be noted that in the embodiments of the present application, a high dielectric constant can be understood as a higher dielectric constant that can be applied to dielectric filters. For example, the dielectric constant can be higher than 6, but the present application does not exclude the case where the dielectric constant is less than or equal to 6, as long as the filtering requirements are met.

[0077] In addition, the entire surface of the resonator 121 may be metal-plated. This metal plating can reduce the risk of energy radiation or leakage within the resonant cavity, thereby helping to improve the performance of the resonator 121. For example, the material of the metal plating on the surface of the resonator 121 includes, but is not limited to, silver, gold, or tin. When there are multiple resonators 121, adjacent resonators 121 can be fixedly connected by sintering the metal plating on their surfaces together.

[0078] The radiator 122, as the main body of the antenna radiation function, can not only be used to radiate or receive electromagnetic waves, but also has resonant properties and can collect and store electromagnetic energy. Therefore, it can also serve as a component of the antenna 12 filter, providing a certain frequency selection capability. In other words, the radiator 122 of the embodiment of the present application has both the antenna radiation function and the frequency selection function of the filter. By integrating the filter and the radiator 122 into a fusion design, the overall structure of the antenna 12 is more compact, thereby helping to reduce the size of the antenna 12. The electrical connection between the radiator 122 and the resonator 121 can be a direct electrical connection (such as through a probe or transmission line) or a coupled connection, and this application does not impose specific restrictions on this. When the radiator 122 and the resonator 121 are coupled, since the transmission line or matching circuit can be omitted, not only the size of the antenna 12 can be reduced, but also the insertion loss of the antenna 12 can be reduced. The coupled connection can be understood as a connection method in which there is no direct electrical contact between the radiator 122 and the resonator 121, but the signal energy can be transmitted between the two through interaction, thereby achieving signal transmission.

[0079] In this embodiment of the present application, the radiator 122 serves two channels simultaneously, with each channel corresponding to one signal. Based on this, the antenna 12 provided in this embodiment of the present application can be used as a dual-polarization antenna. The polarization directions of the two signals corresponding to the antenna 12 can be orthogonal, for example, +45 degrees and -45 degrees, respectively. In this case, the radiator 122 can radiate the electromagnetic energy of the two channels into space in the directions of +45-degree and -45-degree polarized electromagnetic waves, respectively. Furthermore, combined with the out-of-band suppression provided by the radiator itself, it can provide first-order filter suppression capability for each channel.

[0080] In one possible embodiment, radiator 122 may be a dielectric resonator antenna. Specifically, radiator 122 may be a dielectric resonator formed from a microwave dielectric material with a high dielectric constant. For example, the main components of radiator 122 include, but are not limited to, high dielectric constant ceramics such as barium titanate (BaTiO3), barium carbonate (BaCO3), BaO-Ln2O3-TiO3-2-based microwave dielectric ceramics, or composite perovskite-based microwave dielectric ceramics.

[0081] When the radiator 122 is arranged on the resonator 121, a metal coating may be provided on the side of the radiator 122 facing the resonator 121. In this way, the metal coating on the surface of the radiator 122 and the metal coating on the surface of the resonator 121 may be sintered together to achieve relative fixation of the two. In addition, the side of the radiator 122 facing away from the resonator 121 may also have a metal coating, and the metal coating may partially cover or completely cover the side surface of the radiator 122 to adjust the resonant frequency of the radiator 122. Exemplarily, the material of the metal coating on the surface of the radiator 122 includes but is not limited to silver, gold or tin. In some other embodiments, the side of the radiator 122 facing away from the resonator 121 may not be provided with a metal coating, and this application does not impose any restrictions on this.

[0082] In another possible implementation, the radiator 122 may also be implemented as a microstrip resonator. The microstrip resonator also has the frequency selection function of a filter and the radiation performance of an antenna. In a specific implementation, the microstrip resonator can be fixed to the resonator 121 by welding.

[0083] In some embodiments, the radiator 122 and the resonator 121 can be electrically connected through a probe. In a specific implementation, a probe (not shown in the figure) can be provided on the side of the radiator 122 facing the resonator 121, and a metallized through-hole (not shown in the figure) can be provided on the side of the resonator 121 facing the radiator 121 at the position of the probe. Signal energy is transmitted between the radiator 122 and the resonator 121 through the probe and the metallized through-hole. Alternatively, the probe can be provided on the side of the resonator 121 facing the radiator 122, and accordingly, a metallized through-hole can be provided on the side of the radiator 122 facing the resonator 121 at the position of the probe. In this way, signal transmission between the radiator 122 and the resonator 121 can also be achieved.

[0084] In some other embodiments, the radiator 122 and the resonator 121 may be coupled to each other via a gap. In a specific implementation, a first gap (not shown) may be provided on the side of the radiator 122 facing the resonator 121, and a second gap (not shown) may be provided on the side of the resonator 121 facing the radiator 122. The first gap may extend in a direction away from the resonator 121, and the second gap may extend in a direction away from the radiator 122. The first gap and the second gap are positioned opposite each other, and energy coupling is achieved between the radiator 122 and the resonator 121 via the first gap and the second gap. The specific form of the first gap and the second gap may be a circular hole, a square hole, or a hole-shaped structure of other shapes, which is not limited in this application.

[0085] Continuing with Figure 4, the frame 123 is a frame-shaped structure that is closed circumferentially and open at the top and bottom. The frame may have a metal surface. Its function is to utilize the reflection of electromagnetic waves by the metal conductor to change the phase of the electromagnetic waves radiated or received by the radiator 122, so that the phase of the electromagnetic waves on the aperture of the antenna 12 is nearly consistent, thereby fully utilizing the aperture size and achieving high directivity of the antenna 12. Due to the aforementioned function of the frame, the embodiment of the present application no longer needs to use a design with multiple radiators to achieve high directivity of the antenna. In other words, the embodiment of the present application can achieve high directivity of the antenna through the frame while only having a single radiator. Therefore, there is no need for a power splitter network, and the insertion loss of the antenna 12 is also reduced. Combined with the insertion loss reduced by the coupling connection between the radiator 122 and the resonator 121, the overall insertion loss of the antenna 12 can be significantly reduced. In other words, the antenna 12 can reduce loss while achieving high directivity, thereby achieving the effect of increasing gain.

[0086] In some embodiments, the frame 123 can be an all-metal structure. For example, the frame can be made of copper or aluminum. In other embodiments, the frame 123 can be made of plastic. In this case, the metal surface can be obtained by coating or electroplating the surface of the frame 123. It should be noted that the shape of the frame 123 is not limited to the rectangular frame shown in Figure 4. In other embodiments, the frame 123 can also be a circular frame or a polygonal frame, as long as it can enclose the resonator 121 and the radiator 122. This application does not impose any restrictions on this.

[0087] Continuing to refer to Figure 4, in this embodiment, the phase adjustment structure 124 has a similar function to the frame 123, which can be used to adjust the phase of the electromagnetic waves emitted or received by the antenna 12 so that the electromagnetic waves are close to the desired phase distribution on the aperture surface of the antenna 12, thereby helping to achieve high directivity of the antenna 12.

[0088] In a specific embodiment, the phase adjustment structure 124 may be a roughly plate-shaped structure. When fixing it, the antenna 12 may further include a support column (not shown in the figure), one end of the support column is fixedly connected to the reflector 13, and the other end is fixedly connected to the phase adjustment structure 124, thereby supporting the phase adjustment structure 124 above the frame 123, and achieving relative fixation of the phase adjustment structure 124 and the reflector 13. The number of support columns may be one or more, and this application does not impose any restrictions on this. When the number of support columns is multiple, the multiple support columns may be evenly arranged along the edge of the phase adjustment structure 124 to improve the support stability of the phase adjustment structure 124. Of course, in some other embodiments, the phase adjustment structure 124 may also be directly fixed to the top of the frame 123, which helps to simplify the overall structure of the antenna 12.

[0089] In addition, the cross-sectional shape of the phase adjustment structure 124 in the direction perpendicular to the reflective plate 13 is not limited to the rectangle in Figure 4. In some other embodiments, the cross-sectional shape of the phase adjustment structure 124 can also be circular, oblong or other regular or irregular shapes. This application does not impose any restrictions on this.

[0090] In some embodiments, the phase adjustment structure 124 may include a dielectric substrate 1241 and a metal pattern 1242 disposed on the surface of the dielectric substrate 1241. In this case, the phase adjustment structure 124 may be prepared using a process for preparing a printed circuit board (PCB). The metal pattern 1242 may be disposed on the side of the dielectric substrate 1241 facing the radiator 122, or may be disposed on the side of the dielectric substrate 1241 facing away from the radiator 122. By rationally designing the shape of the metal pattern 1242 on the surface of the dielectric substrate 1241 and utilizing its reflection effect on electromagnetic waves, the phase of the electromagnetic wave can be adjusted when the radiator 122 radiates or receives the electromagnetic wave, so that the phase is close to the desired phase on the antenna aperture plane. For example, as shown in FIG. 4 , the metal pattern 1242 may be a plurality of rectangular metal patches arranged in an array.

[0091] FIG5 is a schematic structural diagram of another antenna 12 provided in an embodiment of the present application. Referring to FIG5 , in this embodiment, the antenna may further include a baffle 125 . The baffle 125 may be disposed on the outside of the frame 123 . The baffle 125 also has a metal surface to enhance the effect of the frame 123 on adjusting the amplitude and phase of electromagnetic waves, thereby helping to further improve the directivity of the antenna 12 . In one embodiment, there may be two baffles 125 , namely a first baffle 1251 and a second baffle 1252 as shown in FIG5 . The first baffle 1251 and the second baffle 1252 may be disposed opposite each other on the reflector 13 . As shown in FIG5 , the first baffle 1251 and the second baffle 1252 are disposed on either side of the frame 123 .

[0092] Similar to the frame 123, when realizing the metal surface features of the first baffle 1251 and the second baffle 1252, the first baffle 1251 and the second baffle 1252 can be made of all-metal materials, or other non-metallic materials and obtain a metal surface through metallization treatment. This application does not impose any restrictions on this.

[0093] In some possible embodiments, a metal sheet 1231 may be provided on the side of the frame 123 facing away from the reflector 13. The metal sheet 1231 may partially cover the top of the frame 123 to improve the cross-polarization performance of the antenna 12. In one implementation, the metal sheet 1231 may be generally rectangular in structure, and a first extension portion 1232 and a second extension portion 1233 may be provided on opposite sides of the metal sheet 1231. When the frame 123 is a rectangular frame, the first extension portion 1232 and the second extension portion 1233 may be fixedly connected to two opposite side walls of the frame 123, thereby achieving relative fixation between the metal sheet 1231 and the frame 123. Exemplarily, the method of fixing the first extension portion 1232 and the second extension portion 1233 to the frame 123 includes, but is not limited to, welding.

[0094] In this embodiment, the resonator 121 can be a dielectric resonator with a single-layer structure. The resonator 121 can include eight resonant cavities, and the resonant cavities can be energy coupled and connected through dielectric windows. The two polarization channels of the antenna 12 are defined as the first channel and the second channel. In the specific design, four of the resonant cavities can be used for the first channel of the antenna 12 and provide fourth-order filter suppression capability for the first channel. The other four resonant cavities can be used for the second channel of the antenna 12 and provide fourth-order filter suppression capability for the second channel. In other words, the resonator in this embodiment can perform four filtering for the signals of the first channel and the second channel, respectively.

[0095] In addition, in the embodiment of the present application, the reflector 13, the frame 123, and the phase adjustment structure 124 may also form a resonant structure that can function similarly to a Fabry-Perot cavity, thereby simultaneously providing first-order filter suppression capability for both channels of the antenna 12. Thus, by combining the first-order filter suppression capability provided by the radiator 122 for each of the two channels, and the fourth-order filter suppression capability provided by the resonator 121 for each channel, the antenna 12 provided in this embodiment can provide sixth-order filter suppression capability for each channel.

[0096] Figure 6a is a filtering performance curve of the antenna 12 shown in Figure 5. In Figure 6a, the horizontal axis is frequency and the vertical axis is amplitude (dB). The two curves represent the S11 parameter curve and the normalized radiation energy curve, respectively, where S11 is the input reflection coefficient, that is, the input return loss. The port reflection coefficient represented by the S11 parameter curve has 6 poles, and the suppression characteristics represented by the normalized radiation energy curve are consistent with the sixth-order Chebyshev curve. This shows that this embodiment only uses the four resonant cavities of the resonator 121 to achieve the frequency selection function of the sixth-order filter used in the antenna in the existing scheme, and can obtain the insertion loss reduction benefit of reducing two resonant cavities compared to the existing scheme.

[0097] FIG6b is a graph showing the radiation performance of the antenna 12 shown in FIG5 . In FIG6b , the horizontal axis represents the radiation angle of the antenna signal, and the vertical axis represents the amplitude (dB). The four curves represent the directions of the antenna in the horizontal plane main polarization, horizontal plane cross polarization, vertical plane main polarization, and vertical plane cross polarization, respectively. As can be seen from FIG6b , the angle of the vertical plane main polarization is significantly narrower than the angle of the horizontal plane main polarization. In other words, the beam width of the antenna in the vertical plane is narrower than the beam width in the horizontal plane, and the effect is comparable to that of the traditional three-element array antenna solution. That is, the antenna provided in the embodiment of the present application achieves an effect similar to that of a three-element array antenna. Since this solution does not require a power splitter network, it is possible to obtain the insertion loss reduction benefit of removing the power splitter network while achieving a directivity comparable to that of the current three-element array antenna.

[0098] FIG7 is a schematic diagram of the structure of another antenna 12 provided in an embodiment of the present application. Referring to FIG7 , in this embodiment, the antenna 12 may include two phase adjustment structures 124, and the two phase adjustment structures 124 may be stacked in sequence in a direction away from the reflector 13. In a specific implementation, the arrangement density of the metal patterns on the two phase adjustment structures may be relatively sparse, so that the electromagnetic waves on the aperture surface of the antenna 12 are adjusted to equal phases through the transmission effect of the areas other than the metal patterns on the dielectric substrate on the electromagnetic waves, thereby achieving high directivity of the antenna 12. Similar to the aforementioned embodiment, the antenna 12 provided in this embodiment can also achieve radiation performance similar to that of a three-element array antenna.

[0099] In a specific embodiment, the upper and lower phase adjustment structures 124 can be spaced apart and can be supported and fixed on the reflector 13 by different support columns. In addition, the shapes of the metal patterns of the two phase adjustment structures 124 can be the same or different, and can be specifically designed according to the actual needs of the antenna 12, and this application does not impose any restrictions on this. In addition, the above embodiment illustrates the case where there are one or two phase adjustment structures 124. It should be understood that in some other embodiments, the number of phase adjustment structures 124 can also be three or more. In this case, multiple phase adjustment structures 124 can be stacked in sequence in a direction away from the reflector 13, and a suitable support method can be selected to support and fix them with reference to the case of the two phase adjustment structures 124. No more details will be given here.

[0100] In the above embodiments, in addition to adopting a combination of dielectric plates and metal patterns, the phase adjustment structure can also adopt a design form of all-dielectric materials. Figure 8 is a structural schematic diagram of another phase adjustment structure 124 provided in an embodiment of the present application. Referring to Figure 8, in this embodiment, the phase adjustment structure 124 is made of dielectric material as a whole, and by designing different areas of the phase adjustment structure 124 to have different thicknesses, the phase of the electromagnetic waves radiated or received by the radiator is adjusted so that the phase of the electromagnetic waves is close to the same on the antenna aperture surface. It should be noted that the thickness of the phase adjustment structure 124 in this embodiment can be understood as its dimension in the direction perpendicular to the reflector.

[0101] In a specific embodiment, the thickness of the phase adjustment structure 124 may gradually decrease from the center of the phase adjustment structure 124 toward its edge. In other words, the phase adjustment structure 124 may be roughly thick in the middle and thin at the edges. The phase adjustment structure 124 with such a thickness distribution can effectively adjust the phase of electromagnetic waves, thereby further improving the directivity of the antenna.

[0102] In one possible embodiment, the thickness of the phase adjustment structure 124 may gradually decrease in a step-like manner from the center of the phase adjustment structure 124 toward its edge. In this case, the phase adjustment structure 124 may be considered to include multiple annular structures 1243, which are arranged in sequence from the center to the edge, and the thickness of each annular structure 1243 decreases in sequence along this arrangement direction.

[0103] In another possible embodiment, the thickness of the phase adjustment structure may decrease linearly along a direction from the center of the phase adjustment structure toward its edge. In this case, the surface of the phase adjustment structure from the center toward its edge is a downwardly inclined planar structure. Alternatively, in some other possible embodiments, the thickness of the phase adjustment structure may decrease gradually in an arc shape along a direction from the center of the phase adjustment structure toward its edge. In this case, the surface of the phase adjustment structure from the center toward its edge is a downwardly inclined curved surface structure.

[0104] FIG9 is a schematic structural diagram of another antenna 12 provided in an embodiment of the present application. Referring to FIG9 , in this embodiment, the resonator 121 may be a metal cavity resonator. At this time, the resonator 121 may include a metal shell 1211 and a metal resonant rod (not shown in the figure) arranged in the metal shell 1211. With this structural design, the interval between the main mode resonant frequency and the high-order mode resonant frequency of the antenna 12 can be expanded, thereby improving the high-end suppression performance of the resonator 121. The number of resonators 121 can be multiple, and multiple resonators 121 can be arranged on the same layer on the reflector, or can be distributed in multiple layers. Each layer can include one or more array-arranged resonators 121, and each resonator 121 can provide the antenna 12 with a first-order filter suppression capability.

[0105] In addition, the radiator 122, frame 123, phase adjustment structure 124 and baffle 125 of this embodiment can be designed with reference to any of the above embodiments, and will not be repeated here. The antenna 12 provided in this embodiment can achieve radiation performance similar to that of a three-element array antenna.

[0106] Figure 10 is a schematic diagram of the structure of another antenna 12 provided in an embodiment of the present application. Referring to Figure 10 , the antenna 12 may include a reflector 13, a resonator 121, a radiator 122, and a frame 123. The resonator 121 is disposed on a side surface of the reflector 13, the radiator 122 is disposed on a side of the resonator 121 facing away from the reflector 13, and the radiator 122 is electrically connected to the resonator 121. The frame 123 may be disposed on the side of the reflector 13 where the resonator 121 and radiator 122 are disposed, and may be connected to the reflector 13 to form a housing space for accommodating the resonator 121 and radiator 122.

[0107] In this embodiment, the structures of the reflector 13, resonator 121, radiator 122, and frame 123 can be configured with reference to any of the aforementioned embodiments, and these components will not be described in detail here. Unlike the aforementioned embodiments, the antenna in this embodiment omits a phase adjustment structure. Therefore, the phase adjustment function is primarily performed by the frame 123. The metal surface of the frame 123 reflects electromagnetic waves, changing the phase of the electromagnetic waves radiated or received by the antenna to be approximately consistent across the aperture of the antenna 12, thereby maximizing the aperture size and achieving high directivity of the antenna 12. Since no power splitter network is required, the loss of the antenna 12 is also reduced. Combined with the reduced insertion loss due to the coupling connection between the radiator 122 and the resonator 121, the overall loss of the antenna 12 can be significantly reduced. In other words, the antenna 12 can reduce loss while achieving high directivity, thereby achieving the effect of increasing gain. In addition, since the phase adjustment structure is omitted in this embodiment, the cross-sectional height of the antenna 12 is relatively low, facilitating installation of the antenna 12 in communication equipment.

[0108] In some possible embodiments, a metal sheet 1231 may be provided on the side of the frame 123 facing away from the reflector 13. The metal sheet 1231 may partially cover the top of the frame 123 to improve the cross-polarization performance of the antenna 12. In one implementation, the metal sheet 1231 may be generally rectangular in structure, and a first extension portion 1232 and a second extension portion 1233 may be provided on opposite sides of the metal sheet 1231. When the frame 123 is a rectangular frame, the first extension portion 1232 and the second extension portion 1233 may be fixedly connected to two opposite side walls of the frame 123, thereby achieving relative fixation between the metal sheet 1231 and the frame 123. Exemplarily, the method of fixing the first extension portion 1232 and the second extension portion 1233 to the frame 123 includes, but is not limited to, welding.

[0109] Figure 11 is a schematic diagram of the structure of another antenna 12 provided in an embodiment of the present application. Referring to Figure 11 , in this embodiment, a first baffle 1251 and a second baffle 1252 may be disposed on the outside of the frame 123. Both the first baffle 1251 and the second baffle 1252 have metal surfaces and are positioned relative to each other on the reflector 13 to enhance the effect of the frame 123 on adjusting the amplitude and phase of electromagnetic waves, thereby further improving the directivity of the antenna 12.

[0110] Figure 12 is a schematic diagram of the structure of another antenna provided in an embodiment of the present application. Referring to Figure 12 , antenna 12 may include a reflector 13, a resonator 121, a radiator 122, and a phase adjustment structure 124. Resonator 121 is disposed on a side surface of reflector 13, and radiator 122 is disposed on a side of resonator 121 facing away from reflector 13. Radiator 122 and resonator 121 are electrically connected. Phase adjustment structure 124 may be disposed on a side of radiator 122 facing away from reflector 13.

[0111] In this embodiment, the structures of the reflector 13, resonator 121, radiator 122, and phase adjustment structure 124 can be configured with reference to any of the aforementioned embodiments, and these components will not be described in detail here. Figure 12 illustrates a specific configuration of the phase adjustment structure 124, which utilizes a dielectric substrate 1241 and a metal pattern 1242. Unlike the aforementioned embodiments, the antenna 12 in this embodiment omits a frame, and thus the phase adjustment function is primarily performed by the phase adjustment structure 124. This phase adjustment structure 124 adjusts the electromagnetic waves on the aperture of the antenna 12 to approximately equal phases, thereby maximizing the aperture size and achieving high directivity. Since a power splitter network is not required, the loss of the antenna 12 is also reduced. Combined with the reduced insertion loss achieved by the coupled connection between the radiator 122 and the resonator 121, the overall loss of the antenna 12 can be significantly reduced. In other words, the antenna 12 can reduce loss while maintaining high directivity, thereby achieving increased gain. Furthermore, since the frame is omitted in this embodiment, the overall weight of the antenna 12 is reduced.

[0112] Figure 13 is a schematic diagram of the structure of another antenna 12 provided in an embodiment of the present application. Referring to Figure 13 , the antenna 12 in this embodiment also omits the frame. The design of the reflector 13, resonator 121, radiator 122, and phase adjustment structure 124 can still refer to the arrangements of any of the aforementioned embodiments. Here, another specific structure is shown in which the phase adjustment structure 124 utilizes a combination of a dielectric substrate 1241 and a metal pattern 1242.

[0113] Figure 14 is a schematic diagram of the structure of another antenna 12 provided in an embodiment of the present application. Referring to Figure 14 , the antenna in this embodiment also omits the frame. The design of the reflector 13, resonator 121, radiator 122, and phase adjustment structure 124 can still refer to the arrangements in any of the previous embodiments. This diagram illustrates a specific structure where the phase adjustment structure utilizes an all-dielectric material. The antenna 12 provided in this embodiment can achieve radiation performance similar to that of a four-element array antenna.

[0114] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. An antenna, characterized in that: It includes a reflector, a resonator, a radiator and a frame, wherein: The resonator is arranged on one side of the reflector and is used to filter the signal of the antenna; The radiator is arranged on a side of the resonator away from the reflector, and the radiator is electrically connected to the resonator; The surrounding frame is arranged on the same side of the reflection plate as the resonator and forms an accommodating space for accommodating the resonator and the radiator together with the reflection plate. The surrounding frame has a metal surface.

2. The antenna according to claim 1, wherein It also includes a metal sheet, which is fixed to a side of the surrounding frame facing away from the reflective plate.

3. The antenna according to claim 1 or 2, characterized in that It also includes a first baffle and a second baffle, which are relatively arranged on the same side of the reflector and the resonator, and the first baffle and the second baffle are respectively located outside the frame, and both the first baffle and the second baffle have metal surfaces.

4. The antenna according to any one of claims 1 to 3, characterized in that: It also includes a phase adjustment structure, which is arranged on a side of the frame away from the reflector, and is used to adjust the phase of the signal of the antenna.

5. The antenna according to claim 4, wherein The phase adjustment structure includes a dielectric substrate and a metal pattern arranged on a surface of the dielectric substrate.

6. The antenna according to claim 5, wherein The number of the phase adjustment structure is one or more, and the one or more phase adjustment structures are sequentially arranged in a direction away from the reflection plate.

7. The antenna according to claim 4, wherein The phase adjustment structure is made of a full dielectric material and includes a plurality of regions with different thicknesses in a direction perpendicular to the reflection plate.

8. The antenna according to claim 7, wherein Along the direction from the center to the edge of the phase adjustment structure, the thickness of the phase adjustment structure in the direction perpendicular to the reflection plate gradually decreases.

9. An antenna, characterized in that: The invention comprises a reflector, a resonator, a radiator and a phase adjustment structure, wherein: The resonator is arranged on one side of the reflector and is used to filter the signal of the antenna; The radiator is arranged on a side of the resonator away from the reflector, and the radiator is electrically connected to the resonator; The phase adjustment structure is arranged on a side of the radiator away from the reflection plate, and the phase adjustment structure is used to adjust the phase of the signal of the antenna.

10. The antenna according to claim 9, wherein The phase adjustment structure includes a dielectric substrate and a metal pattern arranged on a surface of the dielectric substrate.

11. The antenna according to claim 10, wherein The number of the phase adjustment structure is one or more, and the one or more phase adjustment structures are sequentially arranged in a direction away from the reflection plate.

12. The antenna according to claim 9, wherein The phase adjustment structure is made of a full dielectric material and includes a plurality of regions with different thicknesses in a direction perpendicular to the reflection plate.

13. The antenna according to claim 12, wherein: Along the direction from the center to the edge of the phase adjustment structure, the thickness of the phase adjustment structure in the direction perpendicular to the reflection plate gradually decreases.

14. The antenna according to any one of claims 9 to 13, wherein: The device further comprises a frame, which is arranged between the reflector and the phase adjustment structure. The frame is connected to the reflector and forms an accommodating space for accommodating the resonator and the radiator. The frame has a metal surface.

15. The antenna according to claim 14, wherein It also includes a metal sheet, which is fixed to a side of the surrounding frame facing away from the reflective plate.

16. The antenna according to claim 14 or 15, characterized in that It also includes a first baffle and a second baffle, which are relatively arranged on the same side of the reflector and the resonator, and the first baffle and the second baffle are respectively located outside the frame, and both the first baffle and the second baffle have metal surfaces.

17. The antenna according to any one of claims 1 to 16, characterized in that: The radiator is a dielectric resonator.

18. The antenna according to claim 17, wherein A metal coating is formed on a surface of the radiator facing away from the resonator.

19. The antenna according to any one of claims 1 to 18, wherein: The radiator is a microstrip resonator.

20. The antenna according to any one of claims 1 to 19, wherein: The resonator is a dielectric resonator, and the resonator includes one or more resonant cavities.

21. The antenna according to any one of claims 1 to 19, wherein: The resonator is a metal cavity resonator, and the resonator comprises a metal shell and a metal resonant rod arranged in the metal shell.

22. The antenna according to any one of claims 1 to 21, characterized in that: The number of the resonator is one or more, and the one or more resonators are stacked in a direction away from the reflection plate.

23. The antenna according to any one of claims 1 to 22, wherein: The radiator and the resonator are electrically connected via a probe; Alternatively, a first slot is provided on a side of the radiator facing the resonator, a second slot is provided on a side of the resonator facing the radiator, the first slot and the second slot are arranged opposite to each other, and the radiator and the resonator are coupled via the first slot and the second slot.

24. A communication device, characterized in that: The invention comprises a baseband processing unit and the antenna according to any one of claims 1 to 23, wherein the antenna is electrically connected to the baseband processing unit.

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