Antenna device and communication equipment

Abstract

The embodiment of the invention provides an antenna device and communication equipment. 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 is provided with a first surface and a second surface which are opposite to each other, and the vertical dielectric substrate is an annular 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 into a whole, and the at least one first radiator is located on the first surface of the horizontal dielectric substrate; the antenna also comprises 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 one end, facing the horizontal dielectric substrate, of each periodic tooth-shaped radiation unit is connected with the first radiator. According to the antenna device provided by the embodiment of the invention, the purpose of antenna aperture miniaturization can be achieved.

Description

Technical Field

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

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

[0003] At present, in the related technology, in order to reduce the antenna diameter, the radiator bending solution or the high dielectric constant medium loading solution is generally adopted. However, this will result in a limited antenna impedance bandwidth. Summary of the invention

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

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

[0006] In order to achieve the above objectives, the present application provides the following technical solutions:

[0007] A first aspect of an embodiment of the present application provides an antenna device, the antenna device at least comprising: 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 a first surface and a second surface opposite to each other, and the vertical dielectric substrate is an annular 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] 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 toothed radiation unit, and each of the at least one periodic toothed radiation unit is connected to the first radiator at one end facing the horizontal dielectric substrate.

[0011] Based on the slow-wave effect unique to the periodic structure, the electrical size of the antenna becomes larger while the physical aperture of the antenna remains unchanged, and the cutoff frequency at the low frequency moves downward, thereby achieving the purpose of miniaturization of the antenna aperture.

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

[0013] In an optional embodiment, the radiation structure further includes: 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 radiator on the horizontal dielectric substrate;

[0016] A microstrip line is extended on the inner ring wall of each of the first radiators, and a projection area of ​​the microstrip line on the horizontal dielectric substrate at least partially overlaps with a projection area of ​​the third radiator on the horizontal dielectric substrate.

[0017] A microstrip line is extended from the radiating arm of each first radiator, and a third radiator is loaded 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 and the projection area of ​​the third radiator on the horizontal dielectric substrate to at least partially overlap, it can be ensured that the microstrip line has strong coupling ability when exciting the third radiator, thereby exciting the resonant mode and expanding the working bandwidth. If there is no overlap, the coupling ability is weak and the resonant mode may not be excited.

[0019] In an optional embodiment, the third radiator is a rectangular ring; each of the third radiators includes: a first part and a second part connected to the first part;

[0020] The projection area of ​​the first part 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 part is smaller than the ring width of the second part.

[0022] In this way, the third radiator forms a stepped rectangular ring structure. By adjusting the line width ratio of the stepped rectangular ring structure, the high-frequency resonance mode can be controlled and the size of the third radiator can be reduced, thereby reducing the third radiator from blocking the radiation arm of the first radiator and causing interference or influence on the first radiator.

[0023] In an optional embodiment, the third radiator has central rotational symmetry. The loaded third radiator has central rotational symmetry, which can stabilize the directional beam radiated by the antenna in the normal direction.

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

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

[0026] In an optional embodiment, it further includes: a metal reflector and a feeding structure;

[0027] One end of the feeding structure is connected to the metal reflection plate, and the other end of the feeding structure is connected to each of the first radiators.

[0028] In an optional embodiment, the feeding structure includes: two mutually orthogonal feeding components;

[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 radiator.

[0031] A second aspect of an embodiment of the present application further provides a communication device, which at least includes: an antenna device as described in any one of the above.

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

[0033] In the communication device provided by the embodiment of the present application, the antenna device at least includes a radiation structure, wherein 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, at least one first radiator is located on the first surface of the horizontal dielectric substrate, a 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 toothed radiation unit, and each periodic toothed radiation unit is connected to the first radiator toward one end of the horizontal dielectric substrate. By loading a periodic toothed radiation unit on each first radiator, since the periodic toothed radiation unit is a periodic toothed structure formed by a plurality of second radiators, based on the slow wave effect, the low-frequency resonance point can be moved downward, thereby achieving the purpose of miniaturizing the antenna aperture. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0035] Figure 1 A schematic diagram of the three-dimensional structure of an antenna device provided in an embodiment of the present application;

[0036] Figure 2 A schematic diagram of a three-dimensional structure of a radiation structure and a feeding structure in an antenna device provided in an embodiment of the present application;

[0037] Figure 3 A schematic diagram of a three-dimensional structure of a radiation structure in an antenna device provided in an embodiment of the present application;

[0038] Figure 4 A top view of a radiation structure in an antenna device provided in an embodiment of the present application;

[0039] Figure 5 Another schematic diagram of the three-dimensional structure of the radiation structure and the feeding structure in the antenna device provided in an embodiment of the present application;

[0040] Figure 6 Another schematic diagram of a three-dimensional structure of a radiation structure in an antenna device provided in an embodiment of the present application;

[0041] Figure 7 A bottom view of a radiation structure in an antenna device provided in an embodiment of the present application;

[0042] Figure 8 Another bottom view of the radiation structure in the antenna device provided in the embodiment of the present application;

[0043] Fig. 9 Another top view of the radiation structure in the antenna device provided in an embodiment of the present application;

[0044] Fig.10 A perspective view of a radiation structure in an antenna device provided in an embodiment of the present application;

[0045] Fig.11 A further top view of the radiation structure in the antenna device provided in an embodiment of the present application;

[0046] Fig.12 A schematic diagram of the three-dimensional structure of a feeding structure in an antenna device provided in an embodiment of the present application;

[0047] Fig.13 A schematic diagram of the three-dimensional structure of one of the feeding components in the feeding structure provided in an embodiment of the present application;

[0048] Fig.14 A schematic diagram of the three-dimensional structure of another feeding component in the feeding structure provided in an embodiment of the present application;

[0049] Fig.15 A schematic diagram of the three-dimensional structure of a metal reflector in an antenna device provided in an embodiment of the present application;

[0050] Fig.16 A schematic diagram of the working impedance bandwidth of the antenna in the antenna device provided in an embodiment of the present application;

[0051] Fig.17 The antenna radiation pattern of the antenna in the antenna device provided in the embodiment of the present application at the 3.5 GHz frequency point;

[0052] Fig.18 A schematic diagram of the horizontal plane half-power lobe width of the antenna at a frequency of 3.5 GHz in the antenna device provided in an embodiment of the present application.

[0053] Description of reference numerals:

[0054] 100-antenna device;

[0055] 110-radiation 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 tooth-shaped radiation unit;

[0063] 1141-second radiator;

[0064] 115-third radiator;

[0065] 1151-Part I;

[0066] 1152-Part II;

[0067] 1153-opening;

[0068] 120-metal reflector;

[0069] 121-notch;

[0070] 130-feed structure;

[0071] 131-feeding assembly;

[0072] 1311-microstrip feeder;

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

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

[0075] 1312-Metal sheet. DETAILED DESCRIPTION

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

[0077] At present, in order to reduce the antenna diameter, the relevant technologies mainly adopt the radiator bending solution or the high dielectric constant medium loading solution, but the antenna impedance bandwidth is limited. In order to widen the antenna impedance bandwidth, a parasitic resonator is usually loaded directly above the main excitation radiator of the antenna, but the antenna profile height and material cost are bound to increase. Therefore, compact broadband antennas have important practical value and market value in communication equipment.

[0078] In order to solve the above problems, the embodiment of the present application provides a new antenna device and a communication device having the antenna device. In the antenna device provided by the embodiment of the present application, the antenna device at least includes: a radiation structure; the radiation structure includes: a horizontal dielectric substrate, a vertical dielectric substrate and at least one first radiator; the horizontal dielectric substrate has a first surface and a second surface relative to each other, 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 at least one first radiator is located on the first surface of the horizontal dielectric substrate; and further 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 radiation unit, and each periodic tooth-shaped radiation unit is connected to the first radiator toward one end of the horizontal dielectric substrate. Based on the slow wave effect unique to the periodic structure, the electrical size of the antenna becomes larger while the physical aperture of the antenna remains unchanged, and the cutoff frequency at the low frequency moves downward, thereby achieving the purpose of miniaturization of the antenna aperture.

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

[0080] Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of this application.

[0081] Figure 1 A schematic diagram of the three-dimensional structure of the antenna device provided in an embodiment of the present application. Figure 2 A three-dimensional structural schematic diagram of the radiation structure and the feeding structure in the antenna device provided in an embodiment of the present application.

[0082] Reference Figure 1 and Figure 2 As shown, an embodiment of the present application provides an antenna device 100, which is specifically a compact broadband antenna. The antenna device 100 may at least include: a radiation structure 110, a metal reflection plate 120 and a feeding structure 130, wherein one end of the feeding structure 130 is connected to the metal reflection plate 120, and the other end of the feeding structure 130 is connected to the radiation structure 110.

[0083] Figure 3 A schematic diagram of a three-dimensional structure of the radiation structure 110 in the antenna device 100 provided in an embodiment of the present application. Figure 4 A top view of the radiation structure 110 in the antenna device 100 provided in an embodiment of the present application. Figure 5Another schematic diagram of the three-dimensional structure of the radiation structure 110 and the feeding structure 130 in the antenna device 100 provided in an embodiment of the present application.

[0084] Figure 6 Another schematic diagram of the three-dimensional structure of the radiation structure 110 in the antenna device 100 provided in an embodiment of the present application. Figure 7 A bottom view of the radiation structure 110 in the antenna device 100 provided in an embodiment of the present application. Figure 8 Another bottom view of the radiation structure 110 in the antenna device 100 provided in an embodiment of the present application. Fig. 9 Another top view of the radiation structure 110 in the antenna device 100 provided in an embodiment of the present application. Fig.10 A perspective view of the radiation structure 110 in the antenna device 100 provided in an embodiment of the present application. Fig.11 This is another top view of the radiation structure 110 in the antenna device 100 provided in the embodiment of the present application.

[0085] Specifically, refer to Figures 3 to 7 As shown, the radiation structure 110 may include: a horizontal dielectric substrate 111, a vertical dielectric substrate 112 and at least one first radiator 113 (see Figure 6 As shown), wherein the horizontal dielectric substrate 111 has a first surface 1111 and a second surface 1112 opposite to each other, and the vertical dielectric substrate 112 can be an annular dielectric substrate.

[0086] One end of the vertical dielectric substrate 112 may 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 connected as a whole, and at least one first radiator 113 may be located on the first surface 1111 of the horizontal dielectric substrate 111. Exemplarily, the first radiator 113 may be printed on the first surface 1111 of the horizontal dielectric substrate 111.

[0087] It should be noted here that, from a process perspective, when the vertical dielectric substrate 112 and the horizontal dielectric substrate 111 are connected as a whole, the integrated design can reduce process costs, eliminate the need for secondary assembly, and reduce the number of structural parts. The integrated design can also increase overall strength.

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

[0089] like Figure 5 and Figure 6As shown, the antenna device 100 may also 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, so that the plurality of second radiators 1141 form at least one periodic toothed radiation unit 114, and each periodic toothed radiation unit 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 embodiment of the present application, periodicity refers to multiple regularly and repeatedly distributed second radiators 1141. Therefore, each periodic toothed radiation unit 114 includes multiple second radiators 1141, and the multiple second radiators 1141 are repeatedly distributed according to a certain pattern.

[0091] Exemplarily, in the periodic tooth-shaped radiation unit 114, each second radiator 1141 may be distributed at an equal distance. Alternatively, a radiation sub-array may be formed between multiple second radiators 1141, the distance between the second radiators 1141 in each radiation sub-array is the first spacing, and the distance between adjacent second radiators 1141 in each radiation sub-array is the second spacing.

[0092] Specifically, Figure 6 In the periodic tooth-shaped radiation unit 114 , twelve second radiators 1141 form one periodic tooth-shaped radiation unit 114 , and in the periodic tooth-shaped radiation unit 114 , two adjacent second radiators 1141 are equidistantly distributed.

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

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

[0095] like Figure 3 and Figure 4 As shown, in the embodiment of the present 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, and 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, a projection area of ​​each third radiator 115 on the horizontal dielectric substrate 111 may be located within a projection area of ​​the first radiator 113 on the horizontal dielectric substrate 111 .

[0097] It is understandable that if Figure 6 and Figure 7 As shown, a microstrip line 1131 is extended on the inner ring wall of each first radiator 113 , and the projection area of ​​the microstrip line 1131 on the horizontal dielectric substrate 111 at least partially overlaps with the projection area of ​​the third radiator 115 on the horizontal dielectric substrate 111 .

[0098] A microstrip line 1131 is extended from the radiating arm of each first radiator 113 , and a third radiator 115 is loaded above the microstrip line 1131 . Electromagnetic energy is coupled to the third radiator 115 via the microstrip line 1131 , so that a new resonant mode is generated at a high frequency, thereby widening the impedance bandwidth of the antenna device 100 .

[0099] In addition, it should be noted that by designing the projection area of ​​the microstrip line 1131 on the horizontal dielectric substrate 111 and the projection area of ​​the third radiator 115 on the horizontal dielectric substrate 111 to at least partially overlap, it can be ensured that the microstrip line 1131 has strong coupling ability when exciting the third radiator 115, thereby exciting the resonant mode and expanding the working bandwidth. If there is no overlap, the coupling ability is weak and the resonant mode may not be excited.

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

[0101] Specifically, Figure 4 As shown, each third radiator 115 may 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 with 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 may be a rectangular ring. For example, the third radiator 115 may be a rectangular ring (see Fig. 9 Alternatively, the third radiator 115 may be a square ring (see Fig.11 shown).

[0103] It is understandable that, in a possible implementation, the ring width of the first portion 1151 may be smaller than the ring width of the second portion 1152. In this way, the third radiator 115 forms a stepped rectangular ring structure, and the high-frequency resonance mode can be controlled by adjusting the line width ratio of the stepped rectangular ring structure, and the size of the third radiator 115 can be reduced, thereby reducing the third radiator 115 from blocking the radiation arm of the first radiator 113, thereby reducing interference or influence on the first radiator 113.

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

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

[0106] Alternatively, in some other embodiments, the side of the second portion 1152 facing away from the first portion 1151 may not have the opening 1153 (see Fig. 9 That is, the third radiator 115 is a closed rectangular ring.

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

[0108] One possible implementation is: See Figure 7 As shown, the microstrip line 1131 may be a Y-shaped microstrip line 1131 .

[0109] Another possible implementation is: See Figure 8 As shown, the microstrip line 1131 may 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 may also be any shape other than Y-shape and T-shape, and is not limited to a single shape. This is just an example.

[0111] like Fig.10 As shown, 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 with the projection area of ​​the first part 1151 of the third radiator 115 on the horizontal dielectric substrate 111.

[0112] Fig.12It is a schematic diagram of the three-dimensional structure of the feeding structure 130 in the antenna device 100 provided in an embodiment of the present application. Fig.13 A schematic diagram of the three-dimensional structure of one of the feeding components in the feeding structure 130 provided in an embodiment of the present application. Fig.14 A schematic diagram of the three-dimensional structure of another feeding component in the feeding structure 130 provided in an embodiment of the present application. Fig.15 This is a schematic diagram of the three-dimensional structure of the metal reflector 120 in the antenna device 100 provided in an embodiment of the present application.

[0113] See also Fig.12 As shown, in the embodiment of the present application, the feeding structure 130 may include: two feeding components 131, wherein the two feeding components 131 are placed orthogonally to each other.

[0114] See also Fig.13 and Fig.14 As shown, each feeding component 131 may include: a microstrip feed line 1311 and two metal sheets 1312. Specifically, the two metal sheets 1312 are arranged at intervals, one end of the microstrip feed line 1311 (i.e., the first end 1311a of the microstrip feed line) is located in one of the metal sheets 1312, and the other end of the microstrip feed line 1311 (i.e., the second end 1311b of the microstrip feed line) 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 reflector 120 , and the other end of each metal sheet 1312 is connected to the first radiator 113 .

[0116] Specifically, Fig.15 As shown, a notch 121 is provided on the metal reflective plate 120 , and one end of each metal sheet 1312 is located in the notch 121 to achieve connection between the metal sheet 1312 and the metal reflective plate 120 .

[0117] Fig.16 A schematic diagram of the working impedance bandwidth of the antenna in the antenna device provided in an embodiment of the present application. Fig.17 The antenna radiation pattern of the antenna in the antenna device provided in the embodiment of the present application at the 3.5 GHz frequency point. Fig.18 A schematic diagram of the horizontal plane half-power lobe width of the antenna at a frequency of 3.5 GHz in the antenna device provided in an embodiment of the present application.

[0118] The antenna performance of the antenna device 100 provided in the embodiment of the present application is described below. Fig.16 In the figure, the horizontal axis is frequency (Ghz) ​​and the vertical axis is voltage standing wave ratio (VSWR). Fig.16It can be seen that when the voltage standing wave ratio VSWR of the antenna is less than 1.5, the operating frequency band covers 3.05GHz-4.91GHz. Figure 7 It can be seen that the gain of the antenna at the frequency of 3.5GHz is 9.36dBi. Figure 8 It can be seen that the horizontal half-power beam width of the antenna at the frequency of 3.5 GHz 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 working center frequency of the antenna.

[0119] In addition, it should be noted that in the antenna device 100 provided in the embodiment of the present application, the antenna operating frequency band is not unique, and can also operate in other frequency bands. The specific frequency band can be determined according to the actual application scenario, and the embodiment of the present application does not limit this.

[0120] In the antenna device 100 provided in the embodiment of the present application, the antenna device 100 may at least include a radiation structure 110, wherein the vertical dielectric substrate 112 is an annular 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 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 annular 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 to the first radiator 113 at one end facing the horizontal dielectric substrate 111. By loading the periodic tooth-shaped radiation unit 114 on each first radiator 113, since the periodic tooth-shaped radiation unit 114 is a periodic tooth-shaped structure formed by a plurality of second radiators 1141, based on the slow wave effect, the low-frequency resonance point can be moved downward, thereby achieving the purpose of miniaturization of the antenna aperture.

[0121] In addition, this embodiment further provides a communication device, which may be a transmitting and receiving device of a wireless communication system, and may include any of the above antenna devices 100 (ie, compact broadband antennas).

[0122] In the communication device provided in the embodiment of the present application, the communication device at least includes an antenna device 100. In the antenna device 100, the antenna device 100 may include at least a radiation structure 110, wherein the vertical dielectric substrate 112 is an annular dielectric substrate, and 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 radiator 113 is located on the first surface 1111 of the horizontal dielectric substrate 111, and multiple second radiators 1141 are located on the inner ring wall of the vertical dielectric substrate 112. The multiple second radiators 1141 form at least one periodic toothed radiation unit 114, and each periodic toothed radiation unit 114 is connected to the first radiator 113 at one end facing the horizontal dielectric substrate 111. By loading a periodic toothed radiation unit 114 on each first radiator 113, since the periodic toothed radiation unit 114 is a periodic toothed structure formed by multiple second radiators 1141, based on the slow wave effect, the low-frequency resonance point can be moved downward, thereby achieving the purpose of miniaturizing the antenna aperture.

[0123] The various embodiments or implementation methods in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referenced to each other.

[0124] In the description of this specification, the description of reference terms such as "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may 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, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents, and these modifications or replacements do not cause the essence of the corresponding technical solutions to 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: Radiating structure; The radiation structure comprises: a horizontal dielectric substrate, a vertical dielectric substrate and at least one first radiator; the horizontal dielectric substrate has a first surface and a second surface opposite to each other, 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 toothed radiation unit, and each of the at least one periodic toothed radiation 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; a portion of each first radiator close to 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 comprises: 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 a projection area of ​​each of the third radiators on the horizontal dielectric substrate is located within a projection area of ​​the first radiator on the horizontal dielectric substrate; A microstrip line is extended on the inner ring wall of each of the first radiators, and a projection area of ​​the microstrip line on the horizontal dielectric substrate at least partially overlaps with a 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 of the third radiators comprises: a first part and a second part connected to the first part; The projection area of ​​the first part on the horizontal dielectric substrate at least partially overlaps with the projection area of ​​the microstrip line on the horizontal dielectric substrate; And 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 a side facing away from the first part.

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

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

9. The antenna device according to claim 8, characterized in that: The feeding structure comprises: two feeding components which are orthogonal to each other; 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; 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 radiator.

10. A communication device, characterized in that: At least comprising the antenna device as described in any one of claims 1-9 above.

Images