Antenna structure and wireless communication device

Abstract

The invention provides an antenna structure and a wireless communication device, the antenna structure comprises a dielectric substrate, a radiation unit, a feed unit and two grounding units, the radiation unit is arranged on the dielectric substrate, the radiation unit is provided with two F-shaped slots, and the two F-shaped slots are symmetrically arranged; the feed unit is arranged on the dielectric substrate, is vertically connected to one side of the radiation unit and is used for feeding an electric signal into the antenna structure; the two grounding units are arranged on the dielectric substrate, the two grounding units are symmetrically arranged on the two sides of the feed unit at a preset distance, the two grounding units and the radiation unit are arranged at intervals, and the grounding units are used for providing grounding for the antenna structure. According to the antenna structure, the symmetrical F-shaped slotted holes are formed in the radiation unit, so that different current paths are generated to excite different working frequency bands when an electric signal is fed in, and therefore, the antenna structure disclosed by the embodiment of the invention is simple and compact in structure, the size of the antenna structure can be reduced, and signals of different working frequency bands can be covered.

Description

Technical Field

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

[0002] Wireless communication technology plays an increasingly important role in people's daily life and work. With the increasing application of miniaturized and multi-frequency wireless communication devices, people have a huge demand for portable wireless communication devices. Antennas, as one of the indispensable components in the field of radio communications, will have the most direct impact on the performance of radio application systems. In order to improve the communication performance of portable devices, researchers and developers of related technologies have begun to consider integrating low-orbit satellite communication technology, 5G communication technology, near-end transmission technology and other communication technologies, so that portable devices can achieve seamless connection and coverage in any situation. In order to make portable devices have a lightweight appearance and support multiple wireless communication protocol standards such as wireless local area network (WLAN), Worldwide Microwave Interoperability Access Technology (WiMAX) and X-band satellite communication frequency bands, it is necessary to design an antenna that meets sufficient bandwidth, simple structure, compact size and stable performance. Summary of the invention

[0003] In view of the above problems, it is necessary to provide an antenna structure and a wireless communication device.

[0004] In a first aspect, the present application provides an antenna structure, which includes: a dielectric substrate; a radiating unit, which is arranged on the dielectric substrate, and has two F-shaped slots, and the two F-shaped slots are symmetrically arranged; a feeding unit, which is arranged on the dielectric substrate, and the feeding unit is vertically connected to one side of the radiating unit, and is used to feed an electrical signal to the antenna structure; two grounding units, which are arranged on the dielectric substrate, and are symmetrically arranged on both sides of the feeding unit at a preset distance, and are both spaced apart from the radiating unit, and the grounding unit is used to provide grounding for the antenna structure.

[0005] In one embodiment of the first aspect, the radiation unit includes a first side, a second side, a third side and a fourth side, the first side is arranged parallel to the third side, the second side is arranged parallel to the fourth side, and the first side is arranged perpendicular to the second side and the fourth side; the two F-shaped slots include a first F-shaped slot and a second F-shaped slot, the first F-shaped slot includes a first slot, a second slot and a third slot, the first slot is opened on the second side and extends in a direction parallel to the first side and close to the fourth side, the second slot is perpendicularly connected to a side of the first slot away from the first side, and extends in a direction parallel to the second side and close to the third side, the third slot is perpendicularly connected to a side of the second slot, and extends in a direction parallel to the first slot and close to the second side, so as to form the F-shaped slot with the first slot and the second slot; the second F-shaped slot and the first F-shaped slot are symmetrically arranged relative to the midline of the radiation unit.

[0006] In one embodiment of the first aspect, the radiation unit is formed with a first radiation section and a second radiation section through the F-shaped slot, the first radiation section is formed on the first side; the second radiation section is vertically connected to the middle of the first radiation section and extends in a direction close to the third side; the first F-shaped slot and the second F-shaped slot are symmetrically arranged relative to the midline of the second radiation section.

[0007] In one embodiment of the first aspect, the radiation unit is further provided with a fourth slot, a fifth slot 25 and two L-shaped slots, the fourth slot is opened at the second side of the radiation unit and extends in a direction parallel to the first side and close to the fourth side, the fourth slot is arranged between the third slot and the third side, and the fourth slot and the fifth slot 25 are symmetrically arranged along the center line of the radiation unit; the two L-shaped slots are symmetrically arranged along the center line of the radiation unit, and are respectively opened at the connection between the second side and the third side and at the connection between the fourth side and the third side.

[0008] In one embodiment of the first aspect, the two L-shaped grooves include a first L-shaped groove and a second L-shaped groove, the first L-shaped groove includes a sixth groove and a seventh groove, the sixth groove is opened at the connection between the third side and the second side, and extends along the third side in a direction close to the fourth side; the seventh groove is vertically connected to a side of the sixth groove close to the second side, and extends along the second side in a direction close to the first side; the second L-shaped groove includes an eighth groove and a ninth groove, the eighth groove is opened at the connection between the third side and the fourth side, and extends along the third side in a direction close to the second side; the ninth groove is vertically connected to a side of the eighth groove close to the fourth side, and extends along the fourth side in a direction close to the first side.

[0009] In one embodiment of the first aspect, the antenna structure is divided into a first radiation area, a second radiation area and a third radiation area by the F-shaped slot, the fourth slot, the fifth slot and the L-shaped slot; the first radiation area includes the area from the first edge to the first slot, the second radiation area includes the area from the first slot to the fourth slot and the fifth slot, and the first radiation area and the second radiation area are used to jointly radiate signals of the first working frequency band; the third radiation area includes the area from the fourth slot to the third edge, and is used to radiate signals of the second working frequency band.

[0010] In one embodiment of the first aspect, a circular groove is formed in the grounding unit, and a semicircular groove is formed on a side of the grounding unit close to the radiation unit.

[0011] In one embodiment of the first aspect, the antenna structure is further used to radiate signals in a third working frequency band and a fourth working frequency band.

[0012] In one embodiment of the first aspect, the center frequencies of the first working frequency band include 2.44 GHz and 3.68 GHz, the signal with a frequency of 2.44 GHz is radiated by the first radiation area, and the signal with a frequency of 3.68 GHz is radiated by the second radiation area; the center frequencies of the second working frequency band include 7.13 GHz and 11.49 GHz, and the signals with frequencies of 7.13 GHz and 11.49 GHz are radiated by the third radiation area.

[0013] A second aspect of the present application provides a wireless communication device, which includes the antenna structure as described above.

[0014] The antenna structure provided by the present application has a radiation unit disposed on a dielectric substrate, and two F-shaped slots are provided on the radiation unit, and the two F-shaped slots are symmetrically arranged; a feeding unit is disposed on the dielectric substrate, and the feeding unit is vertically connected to one side of the radiation unit, and is used to feed an electrical signal to the antenna structure; two grounding units are disposed on the dielectric substrate, and the two grounding units are symmetrically arranged on both sides of the feeding unit at a preset distance, and are both spaced apart from the radiation unit, and the grounding unit is used to provide grounding for the antenna structure. Since symmetrical F-shaped slots are formed on the radiation unit, different current paths are generated when the electrical signal is fed in to excite different working frequency bands, and there is no need to add a structure to make the antenna structure excite different working frequency bands. Therefore, the antenna structure of the embodiment of the present application has a simple and compact structure, can reduce the size of the antenna structure, and can cover signals of different working frequency bands. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of the antenna structure of an embodiment of the present application.

[0016] Figure 2 This is a schematic diagram of the size numbers of the antenna structure of an embodiment of the present application.

[0017] Figure 3 It is a schematic diagram of the standing wave ratio-frequency simulation of the antenna structure of an embodiment of the present application.

[0018] Figure 4 It is a reflection coefficient-frequency simulation diagram of the antenna structure of an embodiment of the present application.

[0019] Figure 5 Schematic diagram of gain-frequency simulation of the antenna structure according to an embodiment of the present application.

[0020] Figure 6 It is a schematic diagram of the radiation efficiency-frequency simulation of the antenna structure of an embodiment of the present application.

[0021] Main component symbols

[0022] Antenna structure 100

[0023] Dielectric substrate 10

[0024] Radiating unit 20

[0025] First side 201

[0026] Second side 202

[0027] The third side 203

[0028] The fourth side 204

[0029] F-shaped slots 21a, 21b

[0030] First slot 210

[0031] The second slot 211

[0032] The third slot 212

[0033] First radiant section 22

[0034] Second radiant section 23

[0035] Fourth slot 24

[0036] Fifth slot 25

[0037] L-shaped slots 26a, 26b

[0038] Sixth slot 260a

[0039] Seventh slot 261a

[0040] Eighth slot 260b

[0041] Ninth slot 261b

[0042] The first radiation area P1

[0043] The second radiation area P2

[0044] The third radiation area P3

[0045] Feed unit 30

[0046] Grounding unit 40

[0047] Ring groove 41

[0048] Semicircular groove 42

[0049] The following specific implementation methods will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0050] 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.

[0051] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0052] In conjunction with the accompanying drawings, some embodiments of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0053] See also Figure 1 and Figure 2 The embodiment of the present application provides an antenna structure 100, which can be set in a wireless communication device to transmit and receive radio electromagnetic waves to transmit and exchange wireless signals, thereby realizing communication between the wireless communication device and other electronic devices. It can be understood that the wireless communication device includes but is not limited to electronic devices such as mobile phones, tablet computers, laptops, smart wearable devices, etc., wherein the smart wearable devices are such as AR / VR glasses, smart watches, etc.

[0054] Please continue reading Figure 1 and Figure 2 The antenna structure 100 includes a dielectric substrate 10 , a radiation unit 20 , a feeding unit 30 and two grounding units 40 , wherein the radiation unit 20 , the feeding unit 30 and the grounding unit 40 are all disposed on the dielectric substrate 10 .

[0055] The radiation unit 20 is provided with two F-shaped slots ( 21 a and 21 b ), and the two F-shaped slots ( 21 a and 21 b ) are symmetrically arranged.

[0056] The feeding unit 30 is vertically connected to one side of the radiation unit 20 and is used to feed an electrical signal into the antenna structure 100 .

[0057] Two grounding units 40 are symmetrically arranged at a preset distance on both sides of the feeding unit 30, and the two grounding units 40 are arranged at a distance from the radiation unit 20, and the grounding units 40 are used to provide grounding for the antenna structure 100. It can be understood that the size of the preset distance can be set according to actual needs.

[0058] In the antenna structure 100 of the embodiment of the present application, when an electrical signal is fed from the feed unit 30, due to the symmetrical F-shaped slots (21a and 21b) formed on the radiation unit 20, different current paths can be generated on the radiation unit 20, so that the radiation unit 20 can excite different working frequency bands. Since symmetrical F-shaped slots (21a and 21b) are provided on the radiation unit 20, different current paths are generated when the electrical signal is fed to excite different working frequency bands, and there is no need to add a structure to make the antenna structure 100 excite different working frequency bands. Therefore, the structure of the antenna structure 100 of the embodiment of the present application is simple and compact, and the size of the antenna structure 100 can be reduced, and signals of different working frequency bands can be covered.

[0059] like Figure 1 and Figure 2 As shown, in some embodiments, the feed unit 30 can be a microstrip feeder, so that the feed unit 30 and the two grounding units 40 together form a coplanar waveguide structure, realizing coplanar waveguide feeding of the antenna structure 100, which can reduce the dielectric loss of the antenna structure 100, realize low-loss transmission of electromagnetic wave signals, and improve the quality of signal transmission. Moreover, the coplanar waveguide structure is convenient for connecting with passive devices and active devices, has a high degree of integration, is conducive to the integration and miniaturization of the antenna structure 100, and, because the coplanar waveguide structure has a low manufacturing cost and a simple process, it can effectively reduce the cost of the antenna structure 100.

[0060] In some specific examples, the feeding unit 30 may be connected to a feeding source (not shown) via an SMA connector (not shown) to receive an electrical signal provided by the feeding source.

[0061] Please continue reading Figure 1 and Figure 2 In some embodiments, the radiation unit 20 includes a first edge 201, a second edge 202, a third edge 203 and a fourth edge 204, the first edge 201 is arranged parallel to the third edge 203, the second edge 202 is arranged parallel to the fourth edge 204, and the first edge 201 is arranged perpendicular to the second edge 202 and the fourth edge 204.

[0062] The two F-shaped slots (21a and 21b) include a first F-shaped slot 21a and a second F-shaped slot 21b. The first F-shaped slot 21a includes a first slot 210, a second slot 211 and a third slot 212. The first slot 210 is opened on the second side 202 and extends in a direction parallel to the first side 201 and close to the fourth side 204. The second slot 211 is perpendicularly connected to a side of the first slot 210 away from the first side 201 and extends in a direction parallel to the second side 202 and close to the third side 203. The third slot 212 is perpendicularly connected to a side of the second slot 211 and extends in a direction parallel to the first slot 210 and close to the second side 202, so as to form an F-shaped slot with the first slot 210 and the second slot 211.

[0063] The second F-shaped slot 21b is symmetrically arranged with respect to the center line of the radiation unit 20 with respect to the first F-shaped slot 21a. Therefore, the second F-shaped slot 21b is provided with three slots like the first F-shaped slot 21a, and is symmetrically arranged with respect to the center line of the radiation unit 20 with respect to the first slot 210, the second slot 211 and the third slot 212 of the first F-shaped slot 21a. The specific structural form of the second F-shaped slot 21b is not described separately here.

[0064] Furthermore, if Figure 1 As shown, the radiation unit 20 is formed with a first radiation section 22 and a second radiation section 23 through F-shaped slots (21a and 21b). The first radiation section 22 is formed at the first side 201. The second radiation section 23 is vertically connected to the middle of the first radiation section 22 and extends in a direction close to the third side 203. The first F-shaped slot 21a and the second F-shaped slot 21b are symmetrically arranged relative to the midline of the second radiation section 23. The first radiation section 22 and the second radiation section 23 form a T-shaped structure, and the first radiation section 22 is aligned with the first side 201 of the radiation unit 20, and the side of the first radiation section 22 away from the first side 201 is the first slot 210 of the F-shaped slot.

[0065] In some embodiments, a fourth slot 24, a fifth slot 25 and two L-shaped slots (26a, 26b) are symmetrically provided on both sides of the radiation unit 20. The fourth slot 24 is provided at the second side 202 of the radiation unit 20 and extends in a direction parallel to the first side 201 and close to the fourth side 204. The fourth slot 24 is provided between the third slot 212 and the third side 203. The fourth slot 24 and the fifth slot 25 are symmetrically provided along the center line of the radiation unit 20. The two L-shaped slots are symmetrically provided along the center line of the radiation unit 20 and are respectively provided at the connection between the second side 202 and the third side 203 and at the connection between the fourth side 204 and the third side 203.

[0066] The fourth slot 24, the fifth slot 25 and the two L-shaped slots 26a and 26b are used to increase the bandwidth of the working frequency band excited by the radiation unit 20, so that the antenna structure 100 has a wider frequency bandwidth and the antenna structure 100 has the advantage of wide frequency band.

[0067] Further, the two L-shaped slots (26a, 26b) include a first L-shaped slot 26a and a second L-shaped slot 26b, the first L-shaped slot 26a includes a sixth slot 260a and a seventh slot 261a, the sixth slot 260a is opened at the connection between the third side 203 and the second side 202, and extends along the third side 203 toward the direction close to the fourth side 204. The seventh slot 261a is perpendicularly connected to a side of the sixth slot 260a close to the second side 202, and extends along the second side 202 toward the direction close to the first side 201. The second L-shaped slot 26b includes an eighth slot 260b and a ninth slot 261b. The eighth slot 260b is opened at the connection between the third side 203 and the fourth side 204, and extends along the third side 203 toward the direction close to the second side 202; the ninth slot 261b is vertically connected to one side of the eighth slot 260b close to the fourth side 204, and extends along the fourth side 204 toward the direction close to the first side 201.

[0068] like Figure 2 As shown, the antenna structure is divided into a first radiation area P1, a second radiation area P2 and a third radiation area P3 by an F-shaped slot (21a, 21b), a fourth slot 24, a fifth slot 25 and an L-shaped slot (26a, 26b). The first radiation area P1 includes the area between the first side 201 and the first slot 210, and the second radiation area P2 includes the area between the first slot 210 and the fourth slot 24 and the fifth slot 25. The first radiation area P1 and the second radiation area P2 are used to jointly radiate signals of the first working frequency band. The third radiation area P3 includes the area between the fourth slot 24 and the third side 203, and is used to radiate signals of the second working frequency band.

[0069] In some embodiments, a circular groove 41 may be provided in the grounding unit 40, and a semicircular groove 42 may be provided on one side of the grounding unit 40 close to the radiation unit 20. The circular groove 41 and the semicircular groove 42 in the two grounding units 40 cooperate with the F-shaped slots (21a, 21b) to enable the antenna structure 100 to excite other working frequency bands different from the first working frequency band and the second working frequency band. The circular groove 41 and the semicircular groove 42 are provided on the grounding unit 40. When an electrical signal is fed into the feeding unit 30, the current path on the grounding unit 40 is changed, thereby changing the direction of the electric field between the feeding unit 30 and the grounding unit 40, and further changing the direction of the current generated on the radiation unit 20, thereby enabling the antenna structure 100 to excite other working frequency bands different from the first working frequency band and the second working frequency band.

[0070] Furthermore, the antenna structure can also be used to radiate signals in the third working frequency band and the fourth working frequency band, which are different from the first working frequency band and the second working frequency band, that is, the annular groove 41 and the semicircular groove 42 cooperate with the F-shaped slot (21a, 21b) to enable the antenna structure 100 to excite other working frequency bands different from the first working frequency band and the second working frequency band, which are the third working frequency band and the fourth working frequency band.

[0071] Specifically, the first working frequency band includes the S band, the second working frequency band includes the X band, the third working frequency band includes the Ku band, and the fourth working frequency band includes the K band. Among them, the frequency range of the S band is 2.0-4.0 GHz, the frequency range of the X band is 8.0-12.0 GHz, the frequency range of the Ku band is 12.0-18.0 GHz, and the frequency range of the K band is 18.0-27.0 GHz. The antenna structure 100 of this embodiment can cover the above four working frequency bands. The S band is suitable for low-orbit satellite communication technology, and the X band is suitable for maritime communication technology. The frequency band range that can be applied to WiMax (World Interoperability for Microwave Access) communication technology includes 10.0-66 GHz. Therefore, the antenna structure 100 of this embodiment can also be applied to WiMax communication technology. Therefore, the antenna structure 100 of the embodiment of the present application can use a variety of communication technologies to achieve communication (such as low-orbit satellite communication technology, navigation communication technology, WiMax communication technology, etc.), and can use appropriate communication technologies to communicate in the corresponding frequency band in various situations.

[0072] Among them, the center frequencies of the first working frequency band include 2.44 GHz and 3.68 GHz, the signal with a frequency of 2.44 GHz is mainly radiated by the first radiation area P1, and the signal with a frequency of 3.68 GHz is mainly radiated by the second radiation area P2; the center frequencies of the second working frequency band include 7.13 GHz and 11.49 GHz, and the signals with frequencies of 7.13 GHz and 11.49 GHz are mainly radiated by the third radiation area P3.

[0073] In some embodiments, the dielectric substrate 10 is rectangular, the first side 201 of the radiation unit 20 is aligned with a side of the dielectric substrate 10, and the center line of the dielectric substrate 10 coincides with the center line of the radiation unit 20. The feeding unit 30 is straight, and one end of the feeding unit 30 away from the radiation unit 20 is aligned with a side of the dielectric substrate 10 parallel to the first side 201 of the radiation unit 20. The grounding unit 40 is rectangular, and one side of the grounding unit 40 away from the radiation unit 20 is colinear with one end of the feeding unit 30 away from the radiation unit 20, and the two sides of the two grounding units 40 away from the feeding unit 30 are respectively aligned with two sides of the dielectric substrate 10 parallel to the second side 202 and the fourth side 204 of the radiation unit 20.

[0074] In the embodiment of the present application, the dielectric substrate 10 can be made of a material with low dielectric constant and low loss factor. For example, the dielectric substrate 10 can be a Rogers RT5880 substrate, or other substrates that can be applied to high frequency bands. Such board technology is mature and stable, and can be made of traditional FR-4 boards. The antenna structure 100 can be made of a metal sheet or by laser direct structuring (LDS), and can also be formed on the dielectric substrate 10 by etching technology.

[0075] In some specific examples, the overall size of the antenna structure 100 is as follows: Figure 2 and Table 1 below:

[0076] <![CDATA[S W ]]> <![CDATA[P W ]]> <![CDATA[F w1 ]]> <![CDATA[F w2 ]]> <![CDATA[F w3 ]]> <![CDATA[W1]]> <![CDATA[W2]]> <![CDATA[W3]]> 22 12 4 2.3 0.5 2.5 3.5 0.8 <![CDATA[S l ]]> <![CDATA[P l ]]> <![CDATA[F l1 ]]> <![CDATA[F l2 ]]> <![CDATA[F l3 ]]> <![CDATA[L1]]> <![CDATA[L2]]> <![CDATA[L3]]> 33.3 24.5 1.5 0.6 19 1.5 1 2 <![CDATA[W f ]]> <![CDATA[W g ]]> <![CDATA[L g ]]> <![CDATA[f g ]]> <![CDATA[f l ]]> <![CDATA[G p ]]> <![CDATA[M1]]> <![CDATA[r1]]> 2.3 9.4 8.3 0.45 8.8 0.5 0.4 1.5

[0077] The units of each dimension are: mm, combined with Figure 2 As shown in Table 1, in the antenna structure 100, the width S of the dielectric substrate 10 is W is 22 mm, and the length S of the dielectric substrate 10 l is 33.3 mm, and the thickness of the dielectric substrate 10 is 0.8 mm (not shown in the figure and not marked in Table 1). l The overall width P of the radiation unit 20 is 24.5 mm. W The width F of the first slot 210 is 12 mm. w1 is 4 mm, and the length F of the first slot 210 is l1 The width F of the second slot 211 is 1.5 mm. w3 is 0.5 mm, and the length of the second slot 211 is equal to the length F of the second radiation section 23 l3 The width F of the third slot 212 is 19 mm. w2 is 2.3 mm, and the length F of the third slot 212 is l2 The length of the first radiation section 22 is equal to the overall width P of the radiation unit 20.W The length F of the second radiation section 23 is the same as 12 mm. l3 The width of the second radiation section 23 is 19 mm, and the width of the second radiation section 23 is 3 mm.

[0078] (Not shown in the figure, not marked in Table 1). The width W1 of the fourth slot 24 and the fifth slot 25 is 2.5 mm, and the length L1 of the fourth slot 24 and the fifth slot 25 is 1.5 mm. The width W2 of the sixth slot 260a and the eighth slot 260b is 3.5 mm, and the length L2 of the sixth slot 260a and the eighth slot 260b is 1 mm. The width W3 of the seventh slot 261b and the ninth slot 261b is 0.8 mm, and the length L3 of the seventh slot 261a and the ninth slot 261b is 2 mm.

[0079] The width W of the feed unit 30 f is 2.3 mm, and the length f of the feed unit 30 is l The spacing distance G between the ground unit 40 and the radiation unit 20 is 8.8 mm. p is 0.5 mm, and the width W of the ground unit 40 is g is 9.4 mm, and the length L of the ground unit 40 is g is 8.3 mm, and the preset distance f between the ground unit 40 and the feeding unit 30 is g The width M1 of the annular groove 41 is 0.45 mm, the radius r1 of the semicircular groove 42 is 1.5 mm.

[0080] See also Figure 3 , Figure 3 The VSWR-frequency simulation diagram of the antenna structure 100 in this example is shown, which reflects the matching degree of the antenna structure 100. The closer the VSWR is to 1, the higher the matching degree of the antenna structure 100, the smaller the reflected power, and the higher the transmission efficiency. Figure 3 As shown, the frequency points where the standing wave ratio is approximately 1 are 3.68GHz and 11.49GHz; the standing wave ratio of the frequency point of 2.44GHz is between 1.5 and 2, and the standing wave ratio of the frequency point of 7.13GHz is between 1 and 1.5, and there are multiple frequency points between 2 and 24GHZ with a standing wave ratio lower than 2, and there are also multiple frequency points with a standing wave ratio between 1 and 1.5. It can be seen that the antenna structure 100 of the present application can at least cover the frequency band of 2 to 24GHz, so that the antenna structure 100 can communicate using a variety of communication technologies applied in different frequency bands. Among them, the first working frequency band (S band) includes two center frequency points, which are 2.44GHz and 3.68GHz respectively; the second working frequency band (X) band includes two center frequency points, which are 7.13GHz and 11.49GHz respectively.

[0081] See also Figure 4 , Figure 4 A reflection coefficient-frequency simulation diagram of the antenna structure 100 of this example is shown, wherein the reflection coefficients of the center frequency points of 2.44 GHz, 3.68 GHz, 7.13 GHz, and 11.49 GHz of the antenna structure 100 are all less than -10 dB, and the reflection coefficients of the frequency band from 12 GHz to 24 GHz are also less than -10 dB, which shows that the antenna structure 100 has a wider frequency band bandwidth.

[0082] See also Figure 5 , Figure 5 The gain-frequency simulation diagram of the antenna structure 100 of this example is shown. Figure 5 It can be seen that the gains of the center frequency points 2.44 GHz, 3.68 GHz, 7.13 GHz, and 11.49 GHz of the antenna structure 100 are 1.2 dB, 1.92 dB, 3.17 dB, and 5.13 dB, respectively, indicating that the antenna structure 100 radiates stronger radiation at the frequency points 2.44 GHz, 3.68 GHz, 7.13 GHz, and 11.49 GHz. Figure 5 It can also be seen that the gain of the antenna structure 100 in the range of 4 GHz to 24 GHz is greater than 2 dB, indicating that the antenna structure 100 has good radiation capability in the range of 4 GHz to 24 GHz.

[0083] See also Figure 6 , Figure 6 The radiation efficiency-frequency simulation diagram of the antenna structure 100 of this example is shown. Figure 6 It can be seen that the radiation frequency of the antenna structure 100 in the range of 4 GHz to 24 GHz is higher than 80%. The antenna structure 100 can cover the S band, X band, Ku band, K band and the frequency band where WiMax can be applied, and has good radiation performance, which can meet the design requirements of the antenna structure 100.

[0084] From the above, the antenna structure 100 of the embodiment of the present application has a simple, compact structure, a small size, and has the characteristics of wide bandwidth, high gain, and high radiation efficiency, thereby achieving a small size and being able to cover multiple operating frequency bands, so that the antenna structure 100 can adopt a variety of communication technologies to achieve communication, and in various situations, suitable communication technologies can be used to communicate in the corresponding frequency band.

[0085] The embodiment of the present application also provides a wireless communication device (not shown), which includes the aforementioned antenna structure 100, so that the wireless communication device can cover multiple working frequency bands and can adopt multiple communication technologies to achieve communication. In various situations, suitable communication technologies can be used to communicate in the corresponding frequency band.

[0086] The above embodiments are only used to illustrate the technical solution of the present application and are not intended to limit it. Although the present application is described in detail with reference to the above preferred embodiments, those skilled in the art should understand that the technical solution of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present application. Those skilled in the art can also make other changes within the spirit of the present application and use them in the design of the present application, as long as they do not deviate from the technical effects of the present application. These changes made in accordance with the spirit of the present application should be included in the scope of protection claimed in the present application.

Claims

1. An antenna structure, characterized in that: The antenna structure comprises: dielectric substrate; A radiation unit is arranged on the dielectric substrate, and two F-shaped slots are provided on the radiation unit, and the two F-shaped slots are symmetrically arranged; A feeding unit, arranged on the dielectric substrate, the feeding unit being vertically connected to one side of the radiating unit and used for feeding an electrical signal into the antenna structure; Two grounding units, the two grounding units are arranged on the dielectric substrate, the two grounding units are symmetrically arranged on both sides of the feeding unit at a preset distance, and are both spaced apart from the radiation unit, and the grounding units are used to provide grounding for the antenna structure.

2. The antenna structure according to claim 1, characterized in that: The radiation unit comprises a first side, a second side, a third side and a fourth side, the first side is arranged in parallel with the third side, the second side is arranged in parallel with the fourth side, and the first side is arranged perpendicular to the second side and the fourth side; The two F-shaped slots include a first F-shaped slot and a second F-shaped slot, the first F-shaped slot includes a first slot, a second slot and a third slot, the first slot is opened on the second side and extends in a direction parallel to the first side and close to the fourth side, the second slot is vertically connected to a side of the first slot away from the first side and extends in a direction parallel to the second side and close to the third side, the third slot is vertically connected to a side of the second slot and extends in a direction parallel to the first slot and close to the second side, so as to form the F-shaped slot with the first slot and the second slot; The second F-shaped slot and the first F-shaped slot are symmetrically arranged relative to the center line of the radiation unit.

3. The antenna structure according to claim 2, characterized in that: The radiation unit is formed with a first radiation section and a second radiation section through the F-shaped slot, wherein the first radiation section is formed on the first side; the second radiation section is vertically connected to the middle of the first radiation section and extends in a direction close to the third side; the first F-shaped slot and the second F-shaped slot are symmetrically arranged relative to the midline of the second radiation section.

4. The antenna structure according to claim 2 or 3, characterized in that: The radiation unit is further provided with a fourth slot, a fifth slot and two L-shaped slots, the fourth slot is provided on the second side of the radiation unit and extends in a direction parallel to the first side and close to the fourth side, the fourth slot is provided between the third slot and the third side, and the fourth slot and the fifth slot are symmetrically provided along the midline of the radiation unit; The two L-shaped slots are symmetrically arranged along the midline of the radiation unit, and are respectively opened at the connection between the second side and the third side and at the connection between the fourth side and the third side.

5. The antenna structure according to claim 4, characterized in that: The two L-shaped slots include a first L-shaped slot and a second L-shaped slot, the first L-shaped slot includes a sixth slot and a seventh slot, the sixth slot is opened at the connection between the third side and the second side, and extends along the third side in a direction close to the fourth side; the seventh slot is vertically connected to a side of the sixth slot close to the second side, and extends along the second side in a direction close to the first side; the second L-shaped slot includes an eighth slot and a ninth slot, the eighth slot is opened at the connection between the third side and the fourth side, and extends along the third side in a direction close to the second side; the ninth slot is vertically connected to a side of the eighth slot close to the fourth side, and extends along the fourth side in a direction close to the first side.

6. The antenna structure according to claim 4, characterized in that: The antenna structure is divided into a first radiation area, a second radiation area and a third radiation area by the F-shaped slot, the fourth slot, the fifth slot and the L-shaped slot; the first radiation area includes the area from the first edge to the first slot, the second radiation area includes the area from the first slot to the fourth slot and the fifth slot, and the first radiation area and the second radiation area are used to jointly radiate signals of the first working frequency band; the third radiation area includes the area from the fourth slot to the third edge, and is used to radiate signals of the second working frequency band.

7. The antenna structure according to claim 6, characterized in that: A circular groove is formed in the grounding unit, and a semicircular groove is formed on a side of the grounding unit close to the radiation unit.

8. The antenna structure according to claim 7, characterized in that: The antenna structure is also used to radiate signals in the third working frequency band and the fourth working frequency band.

9. The antenna structure according to claim 7, characterized in that: The center frequencies of the first working frequency band include 2.44 GHz and 3.68 GHz, the signal with a frequency of 2.44 GHz is radiated by the first radiation area, and the signal with a frequency of 3.68 GHz is radiated by the second radiation area; the center frequencies of the second working frequency band include 7.13 GHz and 11.49 GHz, and the signals with frequencies of 7.13 GHz and 11.49 GHz are radiated by the third radiation area.

10. A wireless communication device, characterized in that: The wireless communication device comprises the antenna structure according to any one of claims 1 to 9.

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