Antenna structure and electronic equipment

Abstract

The utility model provides an antenna structure and electronic equipment, and relates to the technical field of wireless communication. The antenna structure comprises a dielectric substrate; the antenna comprises a dielectric substrate, an antenna unit or a plurality of orthogonally arranged antenna units located on the dielectric substrate, any one of the antenna units comprises a monopole antenna, a microstrip line and a grounding plate, and the monopole antenna comprises a circular monopole antenna and a rectangular monopole antenna which are arranged in a stacked mode in the direction perpendicular to the plane where the dielectric substrate is located. And the microstrip line is electrically connected with the monopole antenna. According to the technical scheme, the monopole antenna in the antenna structure is formed by overlapping the circular monopole antenna and the rectangular monopole antenna, it is guaranteed that the antenna structure is small in size and easy to machine, and then the antenna structure can be better integrated in electronic equipment; and meanwhile, the frequency band of the ultra wide band of the antenna structure is also improved, so that the antenna structure can be suitable for more types of electronic equipment.

Description

Technical Field

[0001] The present application relates to the field of wireless communication technology, and more specifically, to an antenna structure and an electronic device. Background Art

[0002] With the rapid development of modern wireless communication technology, the miniaturization, microstrip, planarization and integration of communication terminal design have become an inevitable trend, and have also become the core idea and development direction of modern circuit design. Therefore, for antenna design, it is required that the antenna continuously reduce the volume and profile while maintaining basic performance, and at the same time achieve overall optimization matching with the system. The planar monopole antenna is a typical antenna planar structure, and its main goal is to make the frequency band wider. The type of ultra-wideband printed monopole antenna structure also belongs to a planar structure. Therefore, when making such an antenna on a dielectric substrate, the monopole antenna, the feeding structure and the ground plate can be etched on the surface of the dielectric substrate through the process of printed circuit technology. The feeding structure of this type of antenna mostly adopts a coplanar waveguide or a microstrip line for feeding. Although the existing antenna structure including the planar monopole antenna has many advantages, its ultra-wideband frequency band still needs to be developed and improved to be applicable to more types of electronic devices. Utility Model Content

[0003] In view of the above problems, the present application provides an antenna structure and an electronic device, which improves the ultra-wideband frequency band of the antenna structure while ensuring that the antenna structure is more miniaturized, so that the antenna structure can be applied to more types of electronic devices and can be better integrated into electronic devices. The specific solution is as follows:

[0004] The present application provides an antenna structure, comprising:

[0005] dielectric substrate;

[0006] An antenna unit or a plurality of antenna units arranged orthogonally on the dielectric substrate, any one of the antenna units comprises: a monopole antenna, a microstrip line and a ground plane, the monopole antenna comprises a circular monopole antenna and a rectangular monopole antenna arranged in a superimposed manner in a direction perpendicular to the surface of the dielectric substrate, and the microstrip line is electrically connected to the monopole antenna.

[0007] Optionally, a notch slot is provided in the monopole antenna.

[0008] Optionally, the notch slot includes a first slot portion, a second slot portion and a connecting slot portion;

[0009] The connecting slotted gap portion is located at the overlapping area of ​​the circular monopole antenna and the rectangular monopole antenna, and the slotted extension direction of the connecting slotted gap portion is parallel to the extension direction of the long side of the rectangular monopole antenna;

[0010] The first slotted slot portion and the second slotted slot portion are respectively connected to the two end portions of the connecting slotted slot portion, and the slot extension directions of the first slotted slot portion and the second slotted slot portion are parallel to the short side extension direction of the rectangular monopole antenna, and the first slotted slot portion and the second slotted slot portion extend to the circular monopole antenna outside the overlapping area.

[0011] Optionally, the dielectric substrate includes a first surface and a second surface that are arranged opposite to each other;

[0012] The monopole antenna, the microstrip line and the ground plane are all located on the first surface of the dielectric substrate, wherein the ground plane comprises a first sub-ground plane and a second sub-ground plane respectively located on both sides of the microstrip line and isolated from the microstrip line;

[0013] Alternatively, the monopole antenna and the microstrip line are located on a first surface of the dielectric substrate, and the ground plane is located on a second surface of the dielectric substrate.

[0014] Optionally, the antenna structure further includes a parasitic unit that matches the multiple antenna units.

[0015] Optionally, the multiple antenna units include a first antenna unit to a fourth antenna unit arranged in sequence in a clockwise direction, the first antenna unit is arranged orthogonally to the second antenna unit, the second antenna unit is arranged orthogonally to the third antenna unit, the third antenna unit is arranged orthogonally to the fourth antenna unit, and the fourth antenna unit is arranged orthogonally to the first antenna unit;

[0016] The parasitic unit is located at the center of an area surrounded by the orthogonal arrangement of the first antenna unit to the fourth antenna unit.

[0017] Optionally, the parasitic unit includes first to fourth sub-parasitic units respectively matched with the first to fourth antenna units, and any one of the first to fourth sub-parasitic units includes:

[0018] A matching part and a connecting part, wherein the matching part is arranged corresponding to the monopole antenna of the corresponding antenna unit, one end of the connecting part is connected to the matching part, and the other end of the connecting part is connected to the other end of the remaining connecting parts.

[0019] Optionally, the dielectric substrate is a rectangular dielectric substrate, wherein the first antenna unit to the fourth antenna unit are respectively located at four corners of the rectangular dielectric substrate.

[0020] Based on the same inventive concept, the present application also provides an electronic device, which includes the above-mentioned antenna structure.

[0021] Optionally, the electronic device includes a mobile device.

[0022] Compared with the prior art, the technical solution provided by this application has at least the following advantages:

[0023] The present application provides an antenna structure and an electronic device, wherein the antenna structure comprises: a dielectric substrate; an antenna unit located on the dielectric substrate or a plurality of antenna units arranged orthogonally, wherein any one of the antenna units comprises: a monopole antenna, a microstrip line and a ground plane, wherein the monopole antenna comprises a circular monopole antenna and a rectangular monopole antenna which are arranged in a superimposed manner in a direction perpendicular to the surface of the dielectric substrate, and the microstrip line is electrically connected to the monopole antenna.

[0024] From the above content, it can be seen that the technical solution provided by the present application, the monopole antenna in the antenna structure is formed by superimposing a circular monopole antenna and a rectangular monopole antenna, which not only ensures that the antenna structure is small in size and easy to process, and can be better integrated into electronic devices; at the same time, it also improves the ultra-wideband frequency band of the antenna structure, so that the antenna structure can be applicable to more types of electronic devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. In conjunction with the drawings and with reference to the following specific implementations, the above and other features, advantages and aspects of the embodiments disclosed in the present application will become more apparent. Throughout the drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic, and the originals and elements are not necessarily drawn to scale.

[0026] Figure 1 A schematic diagram of an antenna structure provided in an embodiment of the present application;

[0027] Figure 2 A structural diagram of another antenna structure provided in an embodiment of the present application;

[0028] Figure 3 A structural diagram of another antenna structure provided in an embodiment of the present application;

[0029] Figure 4 A structural diagram of another antenna structure provided in an embodiment of the present application;

[0030] Figure 5 A structural diagram of another antenna structure provided in an embodiment of the present application;

[0031] Figure 6 A structural diagram of another antenna structure provided in an embodiment of the present application;

[0032] Figure 7 A structural diagram of another antenna structure provided in an embodiment of the present application;

[0033] Figures 8a to 8d It is a comparison diagram of four antenna structures;

[0034] Fig. 9 is a reflection coefficient curve diagram of the antenna structure;

[0035] Fig.10 An isolation curve diagram of the antenna structure provided in an embodiment of the present application;

[0036] Fig.11 A voltage standing wave ratio curve diagram of the antenna structure provided in an embodiment of the present application;

[0037] Fig.12 A reflection coefficient curve diagram of the antenna structure provided in an embodiment of the present application under conditions of different notch slot lengths.

[0038] Reference numerals:

[0039] 100-dielectric substrate; 101-first surface; 102-second surface; 200-antenna unit; 210-monopole antenna; 211-circular monopole antenna; 212-rectangular monopole antenna; 213-notch slot; 2131-first slot portion; 2132-second slot portion; 2133-connecting slot portion; 220-microstrip line; 230-ground plate; 231-first sub-ground plate; 232-second sub-ground plate; 201-first antenna unit; 202-second antenna unit; 203-third antenna unit; 204-fourth antenna unit; 300-parasitic unit; 301-first sub-parasitic unit; 302-second sub-parasitic unit; 303-third sub-parasitic unit; 304-fourth sub-parasitic unit; 310-matching part; 320-connecting part. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions 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. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0041] As described in the background technology, the planar monopole antenna is a typical antenna planar structure, and its main goal is to make the frequency band wider. The type of ultra-wideband printed monopole antenna structure also belongs to a planar structure. Therefore, when making such an antenna on a dielectric substrate, the monopole antenna, the feeding structure and the ground plane can be etched on the surface of the dielectric substrate through the process of printed circuit technology. The feeding structure of this type of antenna mostly adopts a coplanar waveguide or a microstrip line for feeding. Although the existing antenna structure including the planar monopole antenna has many advantages, its ultra-wideband frequency band still needs to be developed and improved to be applicable to more types of electronic devices.

[0042] In view of the above problems, the embodiments of the present application provide an antenna structure and an electronic device, which improves the ultra-wideband frequency band of the antenna structure while ensuring that the antenna structure is more miniaturized, so that the antenna structure can be applied to more types of electronic devices and can be better integrated into electronic devices.

[0043] In order to achieve the above objectives, Figures 1 to 12 The technical solution provided in the embodiments of the present application is described in detail.

[0044] refer to Figure 1 As shown, it is a structural schematic diagram of an antenna structure provided in an embodiment of the present application, wherein the antenna structure provided in an embodiment of the present application may be an antenna structure including a single antenna unit 200, wherein the antenna structure includes: a dielectric substrate 100; an antenna unit 200 located on the dielectric substrate 100, the antenna unit 200 includes: a monopole antenna 210, a microstrip line 220 and a ground plane 230, the monopole antenna 210 includes a circular monopole antenna 211 and a rectangular monopole antenna 212 which are stacked and arranged in a direction perpendicular to the surface of the dielectric substrate 100, the microstrip line 220 is electrically connected to the monopole antenna 210, and the extension direction of the microstrip line 220 is perpendicular to the extension direction of the long side of the rectangular monopole antenna 212. The circular monopole antenna 211 and the rectangular monopole antenna 212 are superimposed and in contact with each other, so the microstrip line 220 can be electrically connected to the circular monopole antenna 211 by contacting with the microstrip line 220 to achieve the purpose of electrical connection between the microstrip line 220 and the monopole antenna 210; or, the microstrip line 220 can also be electrically connected to the rectangular monopole antenna 212 by contacting with the microstrip line 220 to achieve the purpose of electrical connection between the microstrip line 220 and the monopole antenna 210; or, the microstrip line 220 can also be electrically connected to both the circular monopole antenna 211 and the rectangular monopole antenna 212 to achieve the purpose of electrical connection between the microstrip line 220 and the monopole antenna 210. In addition, the microstrip line 220 is connected to an external pin (not shown) at the edge of the dielectric substrate 100 to achieve electrical connection with an external circuit.

[0045] refer to Figure 2 As shown, it is a structural schematic diagram of another antenna structure provided by an embodiment of the present application, wherein the antenna structure provided by the embodiment of the present application may include an antenna structure of multiple antenna units 200, and the antenna structure may be a multiple-input multiple-output (MIMO) antenna structure. The antenna structure includes: a dielectric substrate 100; a plurality of antenna units 200 orthogonally arranged on the dielectric substrate 100, any one of the antenna units 200 includes: a monopole antenna 210, a microstrip line 220 and a ground plane 230, the monopole antenna 210 includes a circular monopole antenna 211 and a rectangular monopole antenna 212 superimposed and arranged in a direction perpendicular to the surface of the dielectric substrate 100, the microstrip line 220 is electrically connected to the monopole antenna 210, and the extension direction of the microstrip line 220 is perpendicular to the extension direction of the long side of the rectangular monopole antenna 212. The circular monopole antenna 211 and the rectangular monopole antenna 212 are superimposed and in contact with each other, so the microstrip line 220 can be electrically connected to the circular monopole antenna 211 by contacting with the microstrip line 220 to achieve the purpose of electrical connection between the microstrip line 220 and the monopole antenna 210; or, the microstrip line 220 can also be electrically connected to the rectangular monopole antenna 212 by contacting with the microstrip line 220 to achieve the purpose of electrical connection between the microstrip line 220 and the monopole antenna 210; or, the microstrip line 220 can also be electrically connected to both the circular monopole antenna 211 and the rectangular monopole antenna 212 to achieve the purpose of electrical connection between the microstrip line 220 and the monopole antenna 210. In addition, the microstrip line 220 is connected to an external pin (not shown) at the edge of the dielectric substrate 100 to achieve electrical connection with an external circuit.

[0046] It can be understood that the technical solution provided in the embodiment of the present application, the monopole antenna 210 in the antenna structure is formed by superimposing a circular monopole antenna 211 and a rectangular monopole antenna 212, which not only ensures that the antenna structure is small in size and easy to process, and can be better integrated into electronic devices; it also improves the ultra-wideband frequency band of the antenna structure, so that the antenna structure can be applicable to more types of electronic devices. In addition, the antenna structure provided in the embodiment of the present application can be a MIMO antenna including more antenna units 200, and the number of antenna units 200 is large, and the antenna channel capacity is doubled. At the same time, the antenna structure is miniaturized for better integration into electronic devices.

[0047] In one embodiment of the present application, the dielectric substrate 100 provided in the embodiment of the present application may be a FR-4 dielectric substrate with a dielectric constant of 4.4, and the present application does not impose any specific restrictions on this. Also, the circular monopole antenna 211 and the rectangular monopole antenna 212 provided in the embodiment of the present application may both be patch radiation elements, wherein the circular monopole antenna 211 may be located between the rectangular monopole antenna 212 and the dielectric substrate 100; that is, when preparing the antenna structure, the circular monopole antenna 211 may be first arranged on the dielectric substrate 100, and then the rectangular monopole antenna 212 may be superimposed on the circular monopole antenna 211, and the present application does not impose any specific restrictions on the superimposed relationship between the circular monopole antenna 211 and the rectangular monopole antenna 212. Optionally, the diameter of the circular monopole antenna 211 provided in the embodiment of the present application can be the same as the length of the long side of the rectangular monopole antenna 212 (wherein the extension direction of the long side of the rectangular monopole antenna 212 tends to be perpendicular or even perpendicular to the extension direction of the microstrip line 220, and the extension direction of the short side of the rectangular monopole antenna 212 tends to be parallel or even parallel to the extension direction of the microstrip line 220), and when the circular monopole antenna 211 and the rectangular monopole antenna 212 are superimposed, the side line of the circular monopole antenna 211 and the long side of the rectangular monopole antenna 212 are arranged tangent to each other.

[0048] The ground plane 230 provided in the embodiment of the present application can be located on the same side surface of the dielectric substrate 100 as the monopole antenna 210 and the microstrip line 220, or the ground plane 230 can also be located on the opposite side surface of the dielectric substrate 100 as the monopole antenna 210 and the microstrip line 220, thereby designing different ground planes 230. Figure 3 As shown, it is a structural schematic diagram of another antenna structure provided in an embodiment of the present application, wherein the structural schematic diagram of the antenna structure is a cross-sectional view at a microstrip line 220 and a ground plane 230, wherein the dielectric substrate 100 includes a first surface 101 and a second surface 102 arranged opposite to each other; the monopole antenna 210, the microstrip line 220 and the ground plane 230 are all located on the first surface 101 of the dielectric substrate 100, wherein the ground plane 230 includes a first sub-ground plane 231 and a second sub-ground plane 232 respectively located on both sides of the microstrip line 220 and isolated from the microstrip line 220, the first sub-ground plane 231 and the second sub-ground plane 232 are symmetrical about the microstrip line 220, wherein the first sub-ground plane 231 and the second sub-ground plane 232 form a rectangular shape when they are relatively moved and spliced.

[0049] Or refer to Figure 4As shown, it is a structural schematic diagram of another antenna structure provided in an embodiment of the present application, wherein the structural schematic diagram of the antenna structure is a cross-sectional diagram at a microstrip line 220 and a ground plane 230, wherein the dielectric substrate 100 includes a first surface 101 and a second surface 102 arranged opposite to each other; the monopole antenna 210 and the microstrip line 220 are located on the first surface 101 of the dielectric substrate 100, and the ground plane 230 is located on the second surface 102 of the dielectric substrate 100, and the ground plane 230 can be a whole rectangular shape.

[0050] In order to improve the performance of the antenna structure, the antenna structure can also be designed more optimally. It should be noted that the following description of the antenna structure is described by taking the MIMO antenna as an example, that is, the antenna structure includes a plurality of antenna units 200 arranged orthogonally. Figure 5 As shown, it is a structural schematic diagram of another antenna structure provided in an embodiment of the present application, wherein the monopole antenna 210 provided in the embodiment of the present application is provided with a notch slot 213, and the notch slot 213 is a closed slot, wherein the design of the notch slot 213 makes the antenna structure have a notch characteristic, thereby preventing some narrow bands from affecting the radiation performance of the antenna structure, and improving the performance of the antenna structure.

[0051] It can be understood that the wave trap slot 213 provided in the embodiment of the present application is a slot of a set shape formed by etching on the monopole antenna 210, which can block or change the current path to a certain extent to affect the current distribution on the antenna surface and achieve the purpose of trapping. The length of the wave trap slot 213 provided in the embodiment of the present application is half of the wavelength of the frequency to be filtered out, and the present application does not make any specific restrictions on this.

[0052] Continue to refer Figure 5As shown, the trap slotted slot 213 provided in the embodiment of the present application includes a first slotted slot portion 2131, a second slotted slot portion 2132 and a connecting slotted slot portion 2133; the connecting slotted slot portion 2133 is located at the overlapping area of ​​the circular monopole antenna 211 and the rectangular monopole antenna 212, and the slot extension direction of the connecting slotted slot portion 2133 is parallel to the long side extension direction of the rectangular monopole antenna 212; and, the first slotted slot portion 2131 and the second slotted slot portion 2132 are respectively connected to the two end portions of the connecting slotted slot portion 2133, and the slot extension direction of the first slotted slot portion 2131 and the second slotted slot portion 2132 is parallel to the short side extension direction of the rectangular monopole antenna 212, wherein the first slot The lengths of the slot portion 2131 and the second slotted slot portion 2132 in the direction of extension of the short side of the rectangular monopole antenna 212 may be the same, and the extension directions of the first slotted slot portion 2131 and the second slotted slot portion 2132 are oriented in the same direction, and the first slotted slot portion 2131 and the second slotted slot portion 2132 extend to the circular monopole antenna 211 outside the overlapping area. Specifically, the first slotted slot portion 2131 and the second slotted slot portion 2132 may extend to a partial area of ​​the circular monopole antenna 211 on the side of the rectangular monopole antenna 212 away from the microstrip line 220; that is, the whole of the wave trap slot 213 provided in the embodiment of the present application may be a concave-shaped structure, and the opening of the concave-shaped wave trap slot 213 is oriented toward the side away from the microstrip line 220. In other embodiments of the present application, the wave trap slot 213 provided in the present application may also be in other shapes, and the present application is not limited to this. Figure 3 The concave shape of the notch slot 213 shown needs to be specifically designed according to actual applications.

[0053] Furthermore, the antenna structure provided in the embodiment of the present application also includes a parasitic unit 300 that matches the multiple antenna units 200. The parasitic unit 300 is a new unit added on the basis of the antenna structure with multiple antenna units 200 provided in any embodiment of the present application. The parasitic unit is similar to a matching branch, but compared to the matching branch, the parasitic unit 300 is not directly connected to the antenna unit 200. Instead, the parasitic unit 300 is coupled with the antenna unit 200 to change the current on the surface of the antenna unit 200 to form a notch. After the parasitic unit 300 is introduced, since the current on the monopole antenna 210 and the current on the parasitic unit 300 flow in opposite directions, the reflection coefficient of the corresponding frequency band will increase, filtering the narrowband interference signal at the frequency band, so that the antenna structure has high isolation performance. For specific reference, Figure 6As shown, it is a structural schematic diagram of another antenna structure provided by an embodiment of the present application, wherein the multiple antenna units provided by the embodiment of the present application include a first antenna unit 201 to a fourth antenna unit 204 arranged in sequence along a clockwise direction, the first antenna unit 201 is arranged orthogonally to the second antenna unit 202, the second antenna unit 202 is arranged orthogonally to the third antenna unit 203, the third antenna unit 203 is arranged orthogonally to the fourth antenna unit 204, and the fourth antenna unit 204 is arranged orthogonally to the first antenna unit 201, so that the first antenna unit 201 to the fourth antenna unit 204 are distributed in a ring direction. The parasitic unit 300 is located at the center of the area surrounded by the orthogonal arrangement of the first antenna unit 201 to the fourth antenna unit 204.

[0054] Continue as Figure 6 As shown, on the basis that the antenna structure includes a parasitic unit 300, the monopole antenna 210 provided in the embodiment of the present application may also include a notch slot 213, which not only ensures that the antenna structure is small in size and easy to process, and can be better integrated into electronic devices; it also improves the ultra-wideband frequency band of the antenna structure, so that the antenna structure can be applied to more types of electronic devices; in addition, the antenna structure provided in the embodiment of the present application also has notch characteristics and high isolation performance.

[0055] Combine the following Figure 7 The specific structure of a parasitic unit 300 provided in an embodiment of the present application is described. Figure 7 A schematic diagram of the structure of another antenna structure provided in an embodiment of the present application, wherein the parasitic unit 300 provided in the embodiment of the present application includes a first sub-parasitic unit 301 to a fourth sub-parasitic unit 304 respectively matched with the first antenna unit 201 to the fourth antenna unit 204, and any one of the first sub-parasitic unit 301 to the fourth sub-parasitic unit 304 includes: a matching part 310 and a connecting part 320, the matching part 310 is arranged corresponding to the monopole antenna 210 of the corresponding antenna unit, one end of the connecting part 320 is connected to the matching part 310, and the other end of the connecting part 320 is connected to the other end of the remaining connecting parts 320. It should be noted that the parasitic unit 300 provided in the embodiment of the present application is not limited to Figure 7 The specific shape shown may also be other shapes in other embodiments of the present application, and the present application does not make any specific limitation on this.

[0056] Combination Figure 6 and Figure 7As shown in any of the accompanying drawings, the dielectric substrate 100 provided in the embodiment of the present application can be a rectangular dielectric substrate, wherein the first antenna unit 201 to the fourth antenna unit 204 are respectively located at the four corners of the rectangular dielectric substrate 100, thereby optimizing the component layout of the antenna structure and ensuring that the volume of the antenna structure is smaller. Optionally, the rectangular dielectric substrate 100 provided in the embodiment of the present application is a square dielectric substrate, which further reduces the volume of the antenna structure, wherein the side length of the square dielectric substrate can be 40 mm, and the thickness of the dielectric substrate can be 8 mm, which is not specifically limited in the present application.

[0057] The performance of the antenna structure provided by the embodiment of the present application is analyzed in more detail below in conjunction with the accompanying drawings. It should be noted that the performance analysis of the antenna structure below is based on the MIMO antenna as an example. Figure 8a to Figure 8b As shown, it is a schematic diagram of the comparison of four antenna structures, among which, Figure 8a The antenna unit 200 only includes an antenna structure 212 of a circular monopole antenna 211. Figure 8b The antenna unit 200 includes an antenna structure of a circular monopole antenna 211 and a rectangular monopole antenna 212. Figure 8c The antenna unit 200 includes a circular monopole antenna 211 and a rectangular monopole antenna 212, and the monopole antenna 210 includes an antenna structure in which a notch slot 213 is provided. Figure 8d The antenna unit 200 includes a circular monopole antenna 211 and a rectangular monopole antenna 212, the monopole antenna 210 includes a notch slot 213, and the antenna structure also includes a parasitic unit 300. Figures 8a to 8d In any of the accompanying drawings, the structural parameters of the multiple antenna units shown in each of the drawings are the same, such as Figure 8d As shown in FIG. , L=40mm, W=40mm, Lg=20mm, L1=8.5mm, L2=10mm, L3=8mm, L4=5mm, L5=3.8mm, and W1=1.2mm.

[0058] Combination Figures 8a to 9 As shown, Fig. 9 is the reflection coefficient curve of the antenna structure, where S11(a) represents Figure 8a Schematic diagram of the reflection coefficient of the antenna structure, S11(b) represents Figure 8b Schematic diagram of the reflection coefficient of the antenna structure, S11(c) represents Figure 8c Schematic diagram of the reflection coefficient of the antenna structure, S11(d) represents Figure 8d The reflection coefficient of the antenna structure is shown in Figure 2. Figure 8aIn the figure, four circular monopole antennas 211 are orthogonally arranged, and the working bandwidth of the antenna structure is 5GHz-7GHz and 10GHz-14GHz. In order to improve the impedance matching of the antenna structure in the intermediate frequency band, Figure 8b The antenna structure shown in the figure superimposes the circular monopole antenna 211 and the rectangular monopole antenna 212. At this time, the antenna structure can cover the working bandwidth of the frequency band of 5GHz-14GHz, and the impedance matching is good. In order to prevent some narrow bands from affecting the radiation performance of the antenna structure, the antenna structure needs to have a notch characteristic. Figure 8c The antenna structure shown includes a notch slot 213. At this time, the reflection coefficient of the antenna structure at 7.2GHz-8.6GHz is greater than -10dB, and has good frequency band suppression performance. In order to reduce the lowest resonant frequency of the antenna structure, Figure 8d The schematic diagram shows that a parasitic unit 300 is added to the antenna structure. At this time, the antenna structure operates in the 2 GHz-14 GHz frequency band, realizing a four-port ultra-wideband MIMO antenna design with X-band notch characteristics.

[0059] refer to Fig.10 As shown, Fig.10 The isolation curve of the antenna structure provided in the embodiment of the present application shows that the isolation between the antenna structures is higher than 20dB in the working frequency band according to the curves of the transmission coefficients S12, S13 and S14. The isolation of the antenna structure is good and meets the requirement of isolation higher than 15dB in actual engineering. Fig.11 As shown, Fig.11 The voltage standing wave ratio curve of the antenna structure provided in the embodiment of the present application shows that the antenna voltage standing wave ratio is less than 2 in all frequency bands except the X-band, indicating that the antenna structure has a good suppression effect in the X-band and meets the design expectations.

[0060] Further references Fig.12 As shown, Fig.12 The reflection coefficient curve of the antenna structure provided in the embodiment of the present application under different notch slot length conditions, wherein, by changing the length L5 of the first slot portion 2131 and the second slot portion 2132 of the notch slot 213, it can be seen that the suppression frequency band of the antenna structure changes with the length of L5. When L5 increases, the antenna suppression frequency band decreases. When L5 is 3.8mm, the antenna structure can achieve 7.2GHz-8.6GHz frequency band suppression, achieving X-band frequency band suppression. Thus, by Figures 9 to 11 The curve analysis shown in the figure shows that by orthogonally arranging four antenna units, a MIMO antenna with four antenna units can be obtained in a limited volume, so that the MIMO antenna has X-band notch characteristics and has an isolation performance higher than 20dB (up to 50dB).

[0061] Based on the same inventive concept, an embodiment of the present application further provides an electronic device, which includes the antenna structure provided by any one of the above embodiments.

[0062] In one embodiment of the present application, the electronic device provided in the embodiment of the present application may include a mobile device, and the present application does not make any specific limitation on this.

[0063] An embodiment of the present application provides an antenna structure and an electronic device, wherein the antenna structure includes: a dielectric substrate; an antenna unit located on the dielectric substrate or multiple antenna units arranged orthogonally, any one of the antenna units includes: a monopole antenna, a microstrip line and a ground plane, the monopole antenna includes a circular monopole antenna and a rectangular monopole antenna that are stacked and arranged in a direction perpendicular to the surface of the dielectric substrate, and the microstrip line is electrically connected to the monopole antenna.

[0064] From the above content, it can be seen that the technical solution provided in the embodiment of the present application, the monopole antenna in the antenna structure is formed by superimposing a circular monopole antenna and a rectangular monopole antenna, which not only ensures that the antenna structure is small in size and easy to process, and can be better integrated into electronic devices; at the same time, it also improves the ultra-wideband frequency band of the antenna structure, so that the antenna structure can be applicable to more types of electronic devices.

[0065] In the description of the present application, it should be understood that the orientation or position relationship indicated by terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0066] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0067] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0068] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0069] In this application, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc., mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do 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. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0070] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. An antenna structure, characterized in that: include: dielectric substrate; An antenna unit or a plurality of antenna units arranged orthogonally on the dielectric substrate, any one of the antenna units comprises: a monopole antenna, a microstrip line and a ground plane, the monopole antenna comprises a circular monopole antenna and a rectangular monopole antenna arranged in a superimposed manner in a direction perpendicular to the surface of the dielectric substrate, and the microstrip line is electrically connected to the monopole antenna.

2. The antenna structure according to claim 1, characterized in that: The monopole antenna is provided with a notch slot.

3. The antenna structure according to claim 2, characterized in that: The notch slot includes a first slot portion, a second slot portion and a connecting slot portion; The connecting slotted gap portion is located at the overlapping area of ​​the circular monopole antenna and the rectangular monopole antenna, and the slotted extension direction of the connecting slotted gap portion is parallel to the extension direction of the long side of the rectangular monopole antenna; The first slotted slot portion and the second slotted slot portion are respectively connected to the two end portions of the connecting slotted slot portion, and the slot extension directions of the first slotted slot portion and the second slotted slot portion are parallel to the short side extension direction of the rectangular monopole antenna, and the first slotted slot portion and the second slotted slot portion extend to the circular monopole antenna outside the overlapping area.

4. The antenna structure according to claim 1, characterized in that: The dielectric substrate comprises a first surface and a second surface which are arranged opposite to each other; The monopole antenna, the microstrip line and the ground plane are all located on the first surface of the dielectric substrate, wherein the ground plane comprises a first sub-ground plane and a second sub-ground plane respectively located on both sides of the microstrip line and isolated from the microstrip line; Alternatively, the monopole antenna and the microstrip line are located on a first surface of the dielectric substrate, and the ground plane is located on a second surface of the dielectric substrate.

5. The antenna structure according to any one of claims 1 to 4, characterized in that: The antenna structure further includes a parasitic unit matched with the plurality of antenna units.

6. The antenna structure according to claim 5, characterized in that: The multiple antenna units include a first antenna unit to a fourth antenna unit which are sequentially arranged in a clockwise direction, wherein the first antenna unit is arranged orthogonally to the second antenna unit, the second antenna unit is arranged orthogonally to the third antenna unit, the third antenna unit is arranged orthogonally to the fourth antenna unit, and the fourth antenna unit is arranged orthogonally to the first antenna unit; The parasitic unit is located at the center of an area surrounded by the orthogonal arrangement of the first antenna unit to the fourth antenna unit.

7. The antenna structure according to claim 6, characterized in that: The parasitic unit includes first to fourth sub-parasitic units respectively matched with the first to fourth antenna units, and any one of the first to fourth sub-parasitic units includes: A matching part and a connecting part, wherein the matching part is arranged corresponding to the monopole antenna of the corresponding antenna unit, one end of the connecting part is connected to the matching part, and the other end of the connecting part is connected to the other end of the remaining connecting parts.

8. The antenna structure according to claim 6, characterized in that: The dielectric substrate is a rectangular dielectric substrate, wherein the first antenna unit to the fourth antenna unit are respectively located at four corners of the rectangular dielectric substrate.

9. An electronic device, characterized in that: The electronic device comprises the antenna structure according to any one of claims 1 to 8.

10. The electronic device according to claim 9, characterized in that: The electronic device includes a mobile device.

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