Antenna device and communication device

Abstract

The embodiment of the present application provides an antenna device and a communication device, the antenna device at least comprises: a radiation structure; the radiation structure comprises: a horizontal dielectric substrate, a vertical dielectric substrate and at least one first radiator; the horizontal dielectric substrate has opposite first and second surfaces, and the vertical dielectric substrate is a ring-shaped dielectric substrate; one end of the vertical dielectric substrate is connected with the first surface of the horizontal dielectric substrate, so that the vertical dielectric substrate and the horizontal dielectric substrate are connected as a whole, and the at least one first radiator is located on the first surface of the horizontal dielectric substrate; further comprising: a plurality of second radiators; the plurality of second radiators are located on the inner ring wall of the vertical dielectric substrate, the plurality of second radiators form at least one periodic tooth-shaped radiation unit, and each periodic tooth-shaped radiation unit is connected with the first radiator at one end of the horizontal dielectric substrate. The antenna device provided by the embodiment of the present application can realize the purpose of antenna aperture miniaturization.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wireless communication, in particular to an antenna device and a communication device. BACKGROUND

[0002] At present, with the rapid development of wireless communication technology, the situation of multiple wireless communication systems coexisting has appeared. A broadband antenna can cover multiple communication frequency bands, which can effectively reduce the number of base stations and thus reduce the construction cost of the base stations. In addition, for a base station communication system, a compact antenna has significant advantages in improving the efficiency of an antenna array and reducing wind resistance. Therefore, a compact broadband antenna has important practical value and market value in a communication device.

[0003] At present, in the related technology, in order to reduce the aperture of the antenna, a scheme of bending a radiator or a scheme of loading a high dielectric constant medium is generally adopted, but this will result in limited antenna impedance bandwidth. SUMMARY

[0004] In view of the above problems, the embodiments of the present application provide an antenna device and a communication device, which can realize the purpose of miniaturization of the aperture of the antenna without sacrificing the antenna impedance bandwidth.

[0005] Another purpose of the present application is to provide a wireless communication device comprising the above compact broadband antenna.

[0006] In order to achieve the above purpose, the embodiments of the present application provide the following technical scheme:

[0007] The first aspect of the embodiments of the present application provides an antenna device, which at least comprises: a radiation structure;

[0008] The radiation structure comprises: a horizontal dielectric substrate, a vertical dielectric substrate and at least one first radiator; the horizontal dielectric substrate has opposite first and second surfaces, and the vertical dielectric substrate is a ring-shaped dielectric substrate;

[0009] One end of the vertical dielectric substrate is connected to the first surface of the horizontal dielectric substrate, so that the vertical dielectric substrate and the horizontal dielectric substrate are connected as a whole, and the at least one first radiator is located on the first surface of the horizontal dielectric substrate;

[0010] Further comprising: a plurality of second radiators; the plurality of second radiators are located on the inner ring wall of the vertical dielectric substrate, the plurality of second radiators form at least one periodic tooth-shaped radiation unit, and each periodic tooth-shaped radiation unit in the at least one periodic tooth-shaped radiation unit is connected to the first radiator towards one end of the horizontal dielectric substrate.

[0011] Based on the slow wave effect of the periodic structure, the electric size of the antenna is enlarged, the cut-off frequency at low frequency is lowered, and the antenna size is reduced.

[0012] In an alternative embodiment, each of the at least one first radiator is a square ring; and a portion of each of the first radiators close to the vertical dielectric substrate is connected to the second radiators.

[0013] In an alternative embodiment, the radiating structure further comprises at least one third radiator;

[0014] The at least one third radiator is located on the second surface of the horizontal dielectric substrate.

[0015] Each of the third radiators corresponds to one of the first radiators, and a projection area of each of the third radiators on the horizontal dielectric substrate is located within a projection area of the first radiators on the horizontal dielectric substrate.

[0016] An inner ring wall of each of the first radiators extends to form a microstrip line, and a projection area of the microstrip line on the horizontal dielectric substrate at least partially overlaps with a projection area of the third radiators on the horizontal dielectric substrate.

[0017] By extending a microstrip line on a radiating arm of each of the first radiators and loading a third radiator above the microstrip line, electromagnetic energy is coupled to the third radiator through the microstrip line to generate a new resonant mode at high frequency, thereby widening the impedance bandwidth of the antenna device.

[0018] In addition, it should be noted that by designing the projection area of the microstrip line on the horizontal dielectric substrate to at least partially overlap with the projection area of the third radiators on the horizontal dielectric substrate, the coupling capability of the microstrip line when exciting the third radiators can be ensured, the resonant mode can be excited, and the working bandwidth can be expanded. If there is no overlap, the coupling capability is weak, and the resonant mode may not be excited.

[0019] In an alternative embodiment, the third radiators are rectangular rings; each of the third radiators comprises a first portion and a second portion connected to the first portion.

[0020] The projection area of the first portion on the horizontal dielectric substrate at least partially overlaps with the projection area of the microstrip line on the horizontal dielectric substrate.

[0021] And the ring width of the first portion is smaller than the ring width of the second portion.

[0022] In this way, the third radiating body forms a stepped rectangular ring structure, and by adjusting the line width ratio of the stepped rectangular ring structure, the high-frequency resonance mode can be controlled, the size of the third radiating body is reduced, and thus the third radiating body shields the radiation arm of the first radiating body, and interference or influence on the first radiating body is reduced.

[0023] In an optional embodiment, the third radiating body has central rotational symmetry. The loaded third radiating body has central rotational symmetry, which can enable the directional beam radiated by the antenna to be stable in the normal direction.

[0024] In an optional embodiment, the second part has an opening on the side away from the first part.

[0025] In an optional embodiment, the microstrip line is a Y-shaped microstrip line; or the microstrip line is a T-shaped microstrip line.

[0026] In an optional embodiment, the antenna device further comprises a metal reflector and a feeding structure.

[0027] One end of the feeding structure is connected to the metal reflector, and the other end of the feeding structure is connected to each of the first radiating bodies.

[0028] In an optional embodiment, the feeding structure comprises two feeding components that are orthogonal to each other.

[0029] Each of the feeding components comprises a microstrip feed line and two spaced metal sheets, one end of the microstrip feed line is located in one of the metal sheets, and the other end of the microstrip feed line is located in the other metal sheet.

[0030] One end of each of the metal sheets is connected to the metal reflector, and the other end of each of the metal sheets is connected to the first radiating body.

[0031] The second aspect of the embodiments of the present application further provides a communication device, which at least comprises the antenna device as described above.

[0032] The antenna device and the communication device provided by the embodiments of the present application have the following advantages:

[0033] The communication device provided by the embodiment of the present application comprises an antenna device, wherein the antenna device comprises a radiation structure, the vertical dielectric substrate is a ring-shaped dielectric substrate, one end of the vertical dielectric substrate is connected to the first surface of the horizontal dielectric substrate, the at least one first radiation body is located on the first surface of the horizontal dielectric substrate, the plurality of second radiation bodies are located on the inner ring wall of the vertical dielectric substrate, the plurality of second radiation bodies form at least one periodic tooth-shaped radiation unit, and each periodic tooth-shaped radiation unit is connected to the first radiation body at one end of the horizontal dielectric substrate. By loading the periodic tooth-shaped radiation unit on each first radiation body, due to the periodic tooth-shaped radiation unit being the periodic tooth-shaped structure formed by the plurality of second radiation bodies, the low-frequency resonance point can be lowered based on the slow wave effect, and the purpose of antenna aperture miniaturization can be achieved. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0035] Figure 1 A perspective structural schematic diagram of the antenna device provided by the embodiment of the present application is shown in the figure.

[0036] Figure 2 A perspective structural schematic diagram of the radiation structure and the feeding structure in the antenna device provided by the embodiment of the present application is shown in the figure.

[0037] Figure 3 A perspective structural schematic diagram of the radiation structure in the antenna device provided by the embodiment of the present application is shown in the figure.

[0038] Figure 4 A top view of the radiation structure in the antenna device provided by the embodiment of the present application is shown in the figure.

[0039] Figure 5 Another perspective structural schematic diagram of the radiation structure and the feeding structure in the antenna device provided by the embodiment of the present application is shown in the figure.

[0040] Figure 6 Another perspective structural schematic diagram of the radiation structure in the antenna device provided by the embodiment of the present application is shown in the figure.

[0041] Figure 7 A bottom view of the radiation structure in the antenna device provided by the embodiment of the present application is shown in the figure.

[0042] Figure 8 Another bottom view of the radiation structure in the antenna device provided by the embodiment of the present application is shown in the figure.

[0043] Figure 9 Another top view of the radiating structure in the antenna device provided by the embodiment of the present application;

[0044] Figure 10 A perspective view of the radiating structure in the antenna device provided by the embodiment of the present application;

[0045] Figure 11 Another top view of the radiating structure in the antenna device provided by the embodiment of the present application;

[0046] Figure 12 A perspective view of the feeding structure in the antenna device provided by the embodiment of the present application;

[0047] Figure 13 A perspective view of one of the feeding components in the feeding structure provided by the embodiment of the present application;

[0048] Figure 14 A perspective view of another feeding component in the feeding structure provided by the embodiment of the present application;

[0049] Figure 15 A perspective view of the metal reflecting plate in the antenna device provided by the embodiment of the present application;

[0050] Figure 16 A working impedance bandwidth diagram of the antenna in the antenna device provided by the embodiment of the present application;

[0051] Figure 17 An antenna pattern diagram of the antenna in the antenna device provided by the embodiment of the present application at a frequency point of 3.5 GHz;

[0052] Figure 18 A horizontal plane half-power beamwidth diagram of the antenna in the antenna device provided by the embodiment of the present application at a frequency point of 3.5 GHz.

[0053] Explanation of reference signs:

[0054] 100 - antenna device;

[0055] 110 - radiating structure;

[0056] 111 - horizontal dielectric substrate;

[0057] 1111 - first surface;

[0058] 1112 - second surface;

[0059] 112 - vertical dielectric substrate;

[0060] 113 - first radiator;

[0061] 1131 - microstrip line;

[0062] 114 - periodic toothed radiating element;

[0063] 1141 - second radiating body;

[0064] 115 - third radiating body;

[0065] 1151 - first part;

[0066] 1152 - second part;

[0067] 1153 - opening;

[0068] 120 - metal reflector plate;

[0069] 121 - slot;

[0070] 130 - feed structure;

[0071] 131 - feed assembly;

[0072] 1311 - microstrip feed line;

[0073] 1311a - first end of the microstrip feed line;

[0074] 1311b - second end of the microstrip feed line;

[0075] 1312 - metal sheet. DETAILED DESCRIPTION

[0076] With the continuous development of the communication industry, the situation of multiple wireless communication systems coexisting has emerged. A broadband antenna can cover multiple communication frequency bands, which can effectively reduce the number of base stations and thus reduce the construction cost of the base stations. In addition, for a base station communication system, a compact antenna has significant advantages in improving the efficiency of the antenna array and reducing wind resistance.

[0077] At present, in order to reduce the aperture of the antenna, the related technology mainly adopts a radiating body bending scheme or a high dielectric constant medium loading scheme, but the impedance bandwidth of the antenna is limited. In order to widen the impedance bandwidth of the antenna, a parasitic resonator is usually loaded directly above the main excitation radiating body of the antenna, but the profile height and material cost of the antenna are bound to increase. Therefore, a compact broadband antenna has important practical value and market value in communication equipment.

[0078] To solve the above problems, the embodiment of the present application provides a new antenna device and a communication device with the antenna device. The antenna device provided by the embodiment of the present application at least comprises a radiation structure, the radiation structure comprises a horizontal dielectric substrate, a vertical dielectric substrate and at least one first radiator, the horizontal dielectric substrate has opposite first and second surfaces, the vertical dielectric substrate is a ring-shaped dielectric substrate, one end of the vertical dielectric substrate is connected to the first surface of the horizontal dielectric substrate, so that the vertical dielectric substrate and the horizontal dielectric substrate are connected as a whole, and the at least one first radiator is located on the first surface of the horizontal dielectric substrate, further comprising a plurality of second radiators, the plurality of second radiators are located on the inner ring wall of the vertical dielectric substrate, the plurality of second radiators form at least one periodic tooth-shaped radiation unit, and each periodic tooth-shaped radiation unit is connected to the first radiator at one end of the horizontal dielectric substrate. Based on the slow wave effect of the periodic structure, the electrical size of the antenna is increased, the cutoff frequency at low frequency is lowered, and the purpose of antenna miniaturization is achieved.

[0079] In order to make the above-mentioned purposes, features and advantages of the embodiments of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all.

[0080] Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0081] Figure 1 A perspective structural schematic diagram of the antenna device provided by the embodiment of the present application is provided. Figure 2 A perspective structural schematic diagram of the radiation structure and the feeding structure in the antenna device provided by the embodiment of the present application is provided.

[0082] Referring to Figure 1 and Figure 2 , the embodiment of the present application provides an antenna device 100, which is specifically a compact broadband antenna. The antenna device 100 at least comprises a radiation structure 110, a metal reflector 120 and a feeding structure 130. One end of the feeding structure 130 is connected to the metal reflector 120, and the other end of the feeding structure 130 is connected to the radiation structure 110.

[0083] Figure 3 A perspective structural schematic diagram of the radiation structure 110 in the antenna device 100 provided by the embodiment of the present application is provided. Figure 4 A top view of the radiation structure 110 in the antenna device 100 provided by the embodiment of the present application is provided. Figure 5Another perspective view of the radiation structure 110 in the antenna device 100 provided by the embodiment of the present application is shown.

[0084] Figure 6 Another perspective view of the radiation structure 110 in the antenna device 100 provided by the embodiment of the present application is shown. Figure 7 A bottom view of the radiation structure 110 in the antenna device 100 provided by the embodiment of the present application is shown. Figure 8 Another bottom view of the radiation structure 110 in the antenna device 100 provided by the embodiment of the present application is shown. Figure 9 Another top view of the radiation structure 110 in the antenna device 100 provided by the embodiment of the present application is shown. Figure 10 A perspective view of the radiation structure 110 in the antenna device 100 provided by the embodiment of the present application is shown. Figure 11 Another top view of the radiation structure 110 in the antenna device 100 provided by the embodiment of the present application is shown.

[0085] Specifically, referring to Figures 3 to 7 As shown, the radiation structure 110 can include a horizontal dielectric substrate 111, a vertical dielectric substrate 112 and at least one first radiator 113 (see Figure 6 As shown, the horizontal dielectric substrate 111 has opposite first and second surfaces 1111 and 1112, and the vertical dielectric substrate 112 can be a ring-shaped dielectric substrate.

[0086] One end of the vertical dielectric substrate 112 can be connected to the first surface 1111 of the horizontal dielectric substrate 111, so that the vertical dielectric substrate 112 and the horizontal dielectric substrate 111 are integrated as a whole, and the at least one first radiator 113 can be located on the first surface 1111 of the horizontal dielectric substrate 111. For example, the first radiator 113 can be printed on the first surface 1111 of the horizontal dielectric substrate 111.

[0087] It should be noted that from the perspective of process, when the vertical dielectric substrate 112 and the horizontal dielectric substrate 111 are integrated as a whole, the integrated design can reduce the process cost, without the need for secondary assembly, and can reduce the number of structural parts. The integrated design can also increase the overall strength.

[0088] Specifically, one end of the feeding structure 130 is connected to the metal reflecting plate 120, and the other end of the feeding structure 130 is connected to each first radiator 113.

[0089] As Figure 5 and Figure 6As shown, the antenna device 100 may further include a plurality of second radiators 1141, wherein the plurality of second radiators 1141 are located on the inner ring wall of the vertical dielectric substrate 112. Exemplarily, the plurality of second radiators 1141 may be printed on the inner ring wall of the vertical dielectric substrate 112, such that the plurality of second radiators 1141 form at least one periodic toothed radiating element 114, and each periodic toothed radiating element 114 is connected to the first radiator 113 at one end facing the horizontal dielectric substrate 111.

[0090] It should be noted that, in the embodiments of this application, periodicity refers to a plurality of regularly and repeatedly distributed second radiators 1141. Therefore, each periodic toothed radiating unit 114 includes a plurality of second radiators 1141, and the plurality of second radiators 1141 are repeatedly distributed according to a certain pattern.

[0091] For example, in the periodic toothed radiation unit 114, the second radiators 1141 may be distributed at equal distances. Alternatively, multiple second radiators 1141 may form a radiation subarray, with the distance between the second radiators 1141 within each radiation subarray being a first spacing, and the distance between adjacent second radiators 1141 between each radiation subarray being a second spacing.

[0092] Specifically, Figure 6 In the periodic toothed radiation unit 114, twelve second radiators 1141 form a periodic toothed radiation unit 114, and in the periodic toothed radiation unit 114, the second radiators 1141 are distributed at equal distances between adjacent pairs of second radiators 1141.

[0093] In this embodiment, the first radiator 113 can be a square ring, and the portion of each first radiator 113 near the vertical dielectric substrate 112 is connected to the second radiator 1141.

[0094] It should be noted that, in the embodiments of this application, the first radiator 113 can also be any shape other than a square ring, and is not limited to a single shape.

[0095] like Figure 3 and Figure 4 As shown in the embodiments of this application, the radiation structure 110 may further include: at least one third radiator 115, wherein at least one third radiator 115 may be located on the second surface 1112 of the horizontal dielectric substrate 111. Exemplarily, the third radiator 115 may be printed on the second surface 1112 of the horizontal dielectric substrate 111, and each third radiator 115 corresponds to a first radiator 113.

[0096] In a possible implementation, the projection area of each third radiator 115 on the horizontal dielectric substrate 111 can be located within the projection area of the first radiator 113 on the horizontal dielectric substrate 111.

[0097] It can be understood that, as shown in Figure 6 and Figure 7 , an inner ring wall of each first radiator 113 extends to form a microstrip line 1131, and the projection area of the microstrip line 1131 on the horizontal dielectric substrate 111 at least partially overlaps the projection area of the third radiator 115 on the horizontal dielectric substrate 111.

[0098] By extending the microstrip line 1131 on the radiating arm of each first radiator 113 and loading the third radiator 115 above the microstrip line 1131, electromagnetic energy is coupled to the third radiator 115 through the microstrip line 1131 to generate a new resonant mode at a high frequency, thereby enabling the impedance bandwidth of the antenna device 100 to be widened.

[0099] In addition, it should be noted that, by designing the projection area of the microstrip line 1131 on the horizontal dielectric substrate 111 to at least partially overlap the projection area of the third radiator 115 on the horizontal dielectric substrate 111, the coupling capability of the microstrip line 1131 when exciting the third radiator 115 can be ensured, the resonant mode can be excited, and the working bandwidth can be widened. If the projection areas do not overlap, the coupling capability is weak, and the resonant mode may not be excited.

[0100] In this way, the embodiment of the present application can solve the problem of simultaneously miniaturizing the antenna aperture and widening the impedance bandwidth, thereby achieving the purposes of reducing the cost of communication equipment and improving the electrical performance of products.

[0101] Specifically, as shown in Figure 4 , each third radiator 115 can include a first part 1151 and a second part 1152, wherein the second part 1152 is connected to the first part 1151, and the projection area of the first part 1151 on the horizontal dielectric substrate 111 at least partially overlaps the projection area of the microstrip line 1131 on the horizontal dielectric substrate 111.

[0102] In the embodiment of the present application, the third radiator 115 can be a rectangular ring, for example, the third radiator 115 can be a rectangular ring (see Figure 9 ), or the third radiator 115 can be a square ring (see Figure 11 ).

[0103] It can be understood that, in a possible implementation, the loop width of the first portion 1151 can be smaller than the loop width of the second portion 1152. In this way, the third radiator 115 forms a stepped rectangular loop structure, and by adjusting the line width ratio of the stepped rectangular loop structure, the high-frequency resonant mode can be controlled, the size of the third radiator 115 is reduced, and thus the third radiator 115 shields the radiation arm of the first radiator 113, causing interference or influence to the first radiator 113.

[0104] In addition, in the embodiment of the present application, the third radiator 115 can have central rotational symmetry. The loaded third radiator 115 has central rotational symmetry, which can enable the directional beam radiated by the antenna to be stable in the normal direction.

[0105] It should be noted that, in some embodiments, the side of the second portion 1152 away from the first portion 1151 can have an opening 1153 (see Figure 4 , that is, the third radiator 115 is an open rectangular loop.

[0106] Alternatively, in some other embodiments, the side of the second portion 1152 away from the first portion 1151 can have no opening 1153 (see Figure 9 , that is, the third radiator 115 is a closed rectangular loop.

[0107] In the embodiment of the present application, the structure of the microstrip line 1131 can include, but is not limited to, the following possible implementations:

[0108] One possible implementation is that, as shown in Figure 7 , the microstrip line 1131 can be a Y-shaped microstrip line 1131.

[0109] Another possible implementation is that, as shown in Figure 8 , the microstrip line 1131 can be a T-shaped microstrip line 1131.

[0110] It should be noted that, in the embodiment of the present application, the shape of the microstrip line 1131 can also be any shape other than Y-shaped and T-shaped, and is not uniquely limited, which is only an example here.

[0111] As shown in Figure 10 , the projection area of each third radiator 115 on the horizontal dielectric substrate 111 can be located within the projection area of the first radiator 113 on the horizontal dielectric substrate 111, and the projection area of the microstrip line 1131 on the horizontal dielectric substrate 111 at least partially overlaps the projection area of the first portion 1151 of the third radiator 115 on the horizontal dielectric substrate 111.

[0112] Figure 12A perspective view of the feeding structure 130 in the antenna device 100 provided in the embodiment of the present application is shown in FIG. 2. Figure 13 A perspective view of one of the feeding components in the feeding structure 130 provided in the embodiment of the present application is shown in FIG. 3. Figure 14 A perspective view of another feeding component in the feeding structure 130 provided in the embodiment of the present application is shown in FIG. 4. Figure 15 A perspective view of the metal reflecting plate 120 in the antenna device 100 provided in the embodiment of the present application is shown in FIG. 5.

[0113] Referring to Figure 12 In the embodiment of the present application, the feeding structure 130 can include two feeding components 131, and the two feeding components 131 are placed orthogonally to each other.

[0114] Referring to Figure 13 and Figure 14 Each feeding component 131 can include a microstrip feed line 1311 and two metal sheets 1312, and specifically, the two metal sheets 1312 are spaced apart, one end (i.e., the first end 1311a of the microstrip feed line) of the microstrip feed line 1311 is located in one of the metal sheets 1312, and the other end (i.e., the second end 1311b of the microstrip feed line) of the microstrip feed line 1311 is located in the other metal sheet 1312.

[0115] In addition, it should be noted that in the embodiment of the present application, one end of each metal sheet 1312 is connected to the metal reflecting plate 120, and the other end of each metal sheet 1312 is connected to the first radiator 113.

[0116] Specifically, as Figure 15 shown, the metal reflecting plate 120 is provided with a slot 121, and one end of each metal sheet 1312 is located in the slot 121 to realize the connection between the metal sheet 1312 and the metal reflecting plate 120.

[0117] Figure 16 A working impedance bandwidth diagram of the antenna in the antenna device provided in the embodiment of the present application is shown in FIG. 6. Figure 17 An antenna directional diagram of the antenna in the antenna device provided in the embodiment of the present application at a frequency point of 3.5 GHz is shown in FIG. 7. Figure 18 A horizontal plane half-power lobe width diagram of the antenna in the antenna device provided in the embodiment of the present application at a frequency point of 3.5 GHz is shown in FIG. 8.

[0118] The antenna performance of the antenna device 100 provided in the embodiment of the present application is described below. Figure 16 In FIG. 9, the abscissa is the frequency (Ghz), and the ordinate is the voltage standing wave ratio (VSWR), and according to Figure 16It can be seen that the antenna works in the frequency range of 3.05GHz-4.91GHz when the voltage standing wave ratio (VSWR) is less than 1.5. Figure 7 It can be seen that the gain of the antenna at the frequency point of 3.5GHz is 9.36dBi. Figure 8 It can be seen that the horizontal half-power beamwidth of the antenna at the frequency point of 3.5GHz is 62°. Finally, in the antenna device 100, the antenna aperture can be 0.36λ*0.36λ, where λ is the wavelength corresponding to the center frequency of the antenna.

[0119] In addition, it should be noted that the antenna device 100 provided by the embodiments of the present application has a non-unique working frequency range, and can also work in other frequency ranges. The specific working frequency range can be determined according to the actual application scenario, and the embodiments of the present application do not limit the working frequency range.

[0120] In the antenna device 100 provided by the embodiments of the present application, the antenna device 100 can at least include a radiation structure 110, wherein the vertical dielectric substrate 112 is a ring-shaped dielectric substrate, one end of the vertical dielectric substrate 112 is connected to the first surface 1111 of the horizontal dielectric substrate 111, so that the vertical dielectric substrate 112 and the horizontal dielectric substrate 111 are connected as a whole, at least one first radiation body 113 is located on the first surface 1111 of the horizontal dielectric substrate 111, a plurality of second radiation bodies 1141 are located on the inner ring wall of the vertical dielectric substrate 112, the plurality of second radiation bodies 1141 form at least one periodic tooth-shaped radiation unit 114, and each periodic tooth-shaped radiation unit 114 is connected to the first radiation body 113 at one end of the horizontal dielectric substrate 111. By loading the periodic tooth-shaped radiation unit 114 on each first radiation body 113, since the periodic tooth-shaped radiation unit 114 is a periodic tooth-shaped structure formed by a plurality of second radiation bodies 1141, based on the slow wave effect, the low frequency resonance point can be lowered, and the purpose of miniaturizing the antenna aperture can be achieved.

[0121] In addition, the embodiments also provide a communication device, which can be a transmitting and receiving device of a wireless communication system, and can include any of the above antenna devices 100 (i.e., compact broadband antennas).

[0122] The communication device provided by the embodiment of the application comprises at least an antenna device 100, and the antenna device 100 comprises at least a radiation structure 110, wherein the vertical dielectric substrate 112 is a ring-shaped dielectric substrate, one end of the vertical dielectric substrate 112 is connected with the first surface 1111 of the horizontal dielectric substrate 111, so that the vertical dielectric substrate 112 and the horizontal dielectric substrate 111 are integrated as a whole, at least one first radiator 113 is located on the first surface 1111 of the horizontal dielectric substrate 111, a plurality of second radiators 1141 are located on the inner ring wall of the vertical dielectric substrate 112, the plurality of second radiators 1141 form at least one periodic tooth-shaped radiation unit 114, and each periodic tooth-shaped radiation unit 114 is connected with the first radiator 113 at one end of the horizontal dielectric substrate 111. By loading the periodic tooth-shaped radiation unit 114 on each first radiator 113, due to the periodic tooth-shaped radiation unit 114 being the periodic tooth-shaped structure formed by the plurality of second radiators 1141, the low-frequency resonance point can be lowered based on the slow wave effect, and the purpose of antenna aperture miniaturization can be achieved.

[0123] In the description of the present specification, each embodiment or implementation is described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts between each embodiment can be referred to each other.

[0124] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0125] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features, and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An antenna device, characterized in that, At least including: Radial structure; The radiating structure includes: a horizontal dielectric substrate, a vertical dielectric substrate, and at least one first radiator; the horizontal dielectric substrate has opposing first and second surfaces, and the vertical dielectric substrate is an annular dielectric substrate. One end of the vertical dielectric substrate is connected to the first surface of the horizontal dielectric substrate, so that the vertical dielectric substrate and the horizontal dielectric substrate are connected as a whole, and the at least one first radiator is located on the first surface of the horizontal dielectric substrate. It also includes: a plurality of second radiators; the plurality of second radiators are located on the inner ring wall of the vertical dielectric substrate, the plurality of second radiators form at least one periodic tooth-shaped radiating unit, and each of the at least one periodic tooth-shaped radiating unit is connected to the first radiator at one end facing the horizontal dielectric substrate.

2. The antenna device according to claim 1, characterized in that, Each of the at least one first radiator is a square ring; the portion of each first radiator near the vertical dielectric substrate is connected to the second radiator.

3. The antenna device according to claim 2, characterized in that, The radiation structure further includes: at least one third radiator; The at least one third radiator is located on the second surface of the horizontal dielectric substrate; Each of the third radiators corresponds to one of the first radiators, and the projection area of ​​each of the third radiators on the horizontal dielectric substrate is located within the projection area of ​​the first radiator on the horizontal dielectric substrate. A microstrip line extends from the inner ring wall of each of the first radiators, and the projection area of ​​the microstrip line on the horizontal dielectric substrate at least partially overlaps with the projection area of ​​the third radiator on the horizontal dielectric substrate.

4. The antenna device according to claim 3, characterized in that, The third radiator is a rectangular ring; each third radiator includes: a first part and a second part connected to the first part; The projection area of ​​the first portion on the horizontal dielectric substrate at least partially overlaps with the projection area of ​​the microstrip line on the horizontal dielectric substrate; Furthermore, the ring width of the first part is smaller than the ring width of the second part.

5. The antenna device according to claim 4, characterized in that, The third radiator has central rotational symmetry.

6. The antenna device according to claim 4, characterized in that, The second part has an opening on the side opposite to the first part.

7. The antenna device according to claim 3, characterized in that, The microstrip line is a Y-type microstrip line; or, the microstrip line is a T-type microstrip line.

8. The antenna device according to any one of claims 1-7, characterized in that, Also includes: Metal reflector and power supply structure; One end of the power feeding structure is connected to the metal reflector, and the other end of the power feeding structure is connected to each of the first radiators.

9. The antenna device according to claim 8, characterized in that, The power supply structure includes two mutually orthogonal power supply components; Each of the power supply components includes: a microstrip feed line and two spaced-apart metal sheets, one end of the microstrip feed line being located in one of the metal sheets and the other end of the microstrip feed line being located in the other metal sheet; One end of each metal sheet is connected to the metal reflector, and the other end of each metal sheet is connected to the first radiator.

10. A communication device, characterized in that, It includes at least the antenna device as described in any one of claims 1-9 above.

Images