Antenna structure and wireless communication device

Abstract

The invention provides an antenna structure and a wireless communication device, the antenna structure comprises a feed-in unit, a first radiation unit, a second radiation unit and a grounding unit, the first radiation unit is formed by connecting a first radiation section and a second radiation section; the second radiation unit is formed by connecting a third radiation section, a fourth radiation section, a fifth radiation section and a sixth radiation section, and the first radiation unit is connected with the second radiation unit through the second radiation section and the third radiation section, so that the antenna structure is compact, and the size of the antenna structure can be reduced. The first radiation unit is used for radiating a radiation signal of a first frequency band, and the second radiation unit is used for radiating a radiation signal of a second frequency band, so that the antenna structure can radiate radiation signals of two different frequency bands. According to the antenna structure provided by the invention, communication signals covering two frequency bands can be realized while the size of the antenna structure is reduced.

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] With the development of modern communication technology, mobile terminal equipment is developing towards miniaturization and integration, which also intensifies the development of related hardware and software products in mobile terminals. Among them, antennas occupy a pivotal position in mobile terminals. The miniaturization and integration of mobile terminals require antennas to have miniaturization, multi-band / ultra-wideband characteristics. The advantage of multi-band antennas is that they can cover multiple communication frequency bands at the same time, thereby reducing the number of antennas in mobile terminals, facilitating the reasonable layout of antennas on limited platforms, and reducing manufacturing costs. At present, multi-band antennas mostly use multi-layer substrates to introduce multiple resonant frequency bands, or load gaps into resonant cavities to achieve multi-band characteristics. However, this type of multi-band antenna has a narrow bandwidth. There are also some multi-band antennas that are realized by loading parasitic units. However, the frequency bands of this multi-band antenna are relatively close, and the larger the parasitic unit used, the larger the size of the antenna and the larger the space occupied. So, how to design a small volume in a limited space without affecting the performance of the antenna has become an urgent problem to be solved. 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] A first aspect of the present application provides an antenna structure, the antenna structure comprising:

[0005] A feeding unit, the feeding unit is used to feed a signal into the antenna structure;

[0006] A grounding unit, the grounding unit is connected to the feeding unit and is used to provide grounding for the antenna structure;

[0007] a first radiating unit, wherein the first radiating unit and the grounding unit are respectively arranged at two sides of the feeding unit, the first radiating unit comprises a first radiating section and a second radiating section, the first radiating section is connected to the feeding unit, and the second radiating section is connected to one side of the first radiating section; and

[0008] A second radiation unit, wherein the second radiation unit and the first radiation unit are arranged in the same plane, and the second radiation unit comprises a third radiation segment, a fourth radiation segment, a fifth radiation segment and a sixth radiation segment; one end of the third radiation segment is vertically connected to one end of the second radiation segment, and extends in a direction parallel to the first radiation segment and away from the grounding unit; the fourth radiation segment is vertically connected to the end of the third radiation segment, and extends in a direction parallel to the second radiation segment and away from the third radiation segment; the fifth radiation segment is vertically connected to one side of the fourth radiation segment, and extends in a direction parallel to the third radiation segment and away from the second radiation segment; the sixth radiation segment is vertically connected to the other side of the fourth radiation segment, and extends in a direction parallel to the third radiation segment and close to the second radiation segment;

[0009] The first radiation unit is used to radiate signals in a first frequency band, and the second radiation unit is used to radiate signals in a second frequency band, and the frequency of the second frequency band is lower than the frequency of the first frequency band.

[0010] In one embodiment of the first aspect, the first radiating segment is rectangular and has a first slot, a first side of the first radiating segment is connected to the feeding unit, the second radiating segment is straight-strip shaped, and the second radiating segment is vertically connected to a second side of the first radiating segment that is perpendicular to the first side to form an L-shaped structure with the first radiating segment; the third radiating segment is straight-strip shaped and has a second slot along the length direction of the third radiating segment; the first slot and the second slot are used to increase the resonant impedance bandwidth of the antenna structure.

[0011] In one embodiment of the first aspect, the fifth radiation segment and the sixth radiation segment are both in a straight strip shape and are collinearly disposed.

[0012] In one embodiment of the first aspect, the widths of the second radiation segment, the third radiation segment, the fourth radiation segment, the fifth radiation segment and the sixth radiation segment are the same; and the width of the first radiation segment is greater than the width of the second radiation segment.

[0013] In one embodiment of the first aspect, the grounding unit is arranged coplanar with the first radiation unit and the second radiation unit; or the plane where the grounding unit is located is arranged parallel to the plane where the first radiation unit and the second radiation unit are located.

[0014] In one embodiment of the first aspect, the grounding unit is coplanarly arranged with the first radiation unit, and the grounding unit includes a first grounding segment, a second grounding segment, a third grounding segment, a fourth grounding segment, and a fifth grounding segment;

[0015] The first grounding segment is connected to the feeding unit, and extends in a direction parallel to the first radiating segment and away from the feeding unit; the second grounding segment is connected to one side of the first grounding segment, and extends in a direction parallel to the second radiating segment and away from the feeding unit; one end of the third grounding segment is vertically connected to the end of the second grounding segment, and extends in a direction parallel to the first grounding segment and away from the feeding unit; the fourth grounding segment is vertically connected to the end of the third grounding segment, and extends in a direction parallel to the second grounding segment and close to the feeding unit; the fifth grounding segment is vertically connected to one side of the fourth grounding segment, and extends in a direction parallel to the third grounding segment and close to the feeding unit.

[0016] In one embodiment of the first aspect, the first grounding segment is in a straight strip shape and is disposed collinearly with the first radiating segment, and the fifth grounding segment is in a straight strip shape and is disposed collinearly with the fifth radiating segment and the sixth radiating segment.

[0017] In one embodiment of the first aspect, a width of the first grounding segment is the same as a width of the first radiation segment, and a width of the fifth grounding segment is the same as a width of the fifth radiation segment and the sixth radiation segment.

[0018] In one embodiment of the first aspect, the feeding unit is a coaxial cable, the first radiation unit is connected to an inner conductor of the coaxial cable, and the grounding unit is connected to an outer conductor of the coaxial cable.

[0019] A second aspect of the present application provides a wireless communication device, which includes a printed circuit substrate and the antenna structure as described above, wherein the antenna structure is arranged on the printed circuit substrate, and the printed circuit substrate is connected to the feeding unit to provide a feeding signal and grounding for the antenna structure.

[0020] The antenna structure provided by the present application comprises a first radiation unit formed by connecting a first radiation section and a second radiation section, a second radiation unit formed by connecting a third radiation section, a fourth radiation section, a fifth radiation section and a sixth radiation section, and the first radiation unit is connected to the second radiation unit through the second radiation section and the third radiation section, so that the structure of the antenna structure is compact and the size of the antenna structure can be reduced. The first radiation unit is used to radiate radiation signals of the first frequency band, and the second radiation unit is used to radiate radiation signals of the second frequency band, so that the antenna structure can radiate radiation signals of two different frequency bands, so that the antenna structure can cover communication signals of two frequency bands. Therefore, the present application can achieve coverage of communication signals of two frequency bands while reducing the size of the antenna structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of the antenna structure of an embodiment of the present application.

[0022] Figure 2 This is a schematic diagram of the size numbers of the antenna structure of an embodiment of the present application.

[0023] Figure 3 The return loss curve of the antenna structure according to the embodiment of the present application varies with the width of the first slot.

[0024] Figure 4 The return loss curve of the antenna structure according to the embodiment of the present application varies with the width of the second slot.

[0025] Figure 5 The return loss curve diagram of the antenna structure according to the embodiment of the present application changes with the length of the second radiation section.

[0026] Figure 6 It is a return loss curve diagram of the antenna structure according to the embodiment of the present application as the length of the fifth radiation segment changes.

[0027] Figure 7 It is a return loss curve diagram of the antenna structure of an embodiment of the present application.

[0028] Figure 8 This is a current distribution diagram of the antenna structure of an embodiment of the present application at a first resonant frequency point in a first frequency band.

[0029] Fig. 9 This is a current distribution diagram of the antenna structure according to an embodiment of the present application at the second resonant frequency point in the first frequency band.

[0030] Fig.10 This is a current distribution diagram of the antenna structure of an embodiment of the present application at the resonant frequency point in the second frequency band.

[0031] Fig.11 This is the radiation pattern of the antenna structure of an embodiment of the present application at the first resonant frequency point in the first frequency band.

[0032] Fig.12 This is the radiation pattern of the antenna structure of an embodiment of the present application at the second resonant frequency point in the first frequency band.

[0033] Fig.13 : This is the radiation pattern of the antenna structure of the embodiment of the present application at the resonant frequency point in the second frequency band.

[0034] Main component symbols

[0035] Antenna structure 100

[0036] Feeding unit 110

[0037] The first radiation unit 120

[0038] The first radiation section 121

[0039] First side A

[0040] Second side B

[0041] The second radiation section 122

[0042] The second radiation unit 130

[0043] The third radiation section 131

[0044] Fourth radiant section 132

[0045] Fifth radiant section 133

[0046] Sixth radiant section 134

[0047] First slot 135

[0048] Second slot 136

[0049] Grounding unit 140

[0050] The first grounding section 141

[0051] The second grounding section 142

[0052] The third grounding section 143

[0053] Fourth grounding section 144

[0054] Fifth ground section 145

[0055] Printed circuit board 200

[0056] The following specific implementation methods will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0057] 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.

[0058] It should be noted that when an element is referred to as being "electrically connected" to another element, it may be directly on the other component or there may be an intermediate element. When an element is considered to be "electrically connected" to another element, it may be a contact connection, for example, a wire connection, or a contactless connection, for example, a contactless coupling.

[0059] 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.

[0060] 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.

[0061] See also Figure 1 and Figure 2 , an embodiment of the present application provides an antenna structure 100, which can be arranged 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 smart wearable devices are such as AR / VR glasses, smart watches, etc. In the embodiment of the present application, the antenna structure 100 can be made of metal sheet or made by laser direct structuring (LDS), and can also be formed on a printed circuit board by etching technology.

[0062] Please continue reading Figure 1 and Figure 2 , the antenna structure 100 includes a feeding unit 110, a first radiating unit 120, a second radiating unit 130 and a grounding unit 140. Among them, the feeding unit 110, the first radiating unit 120, the second radiating unit 130 and the grounding unit 140 are all sheets. In the embodiment of the present application, the feeding unit 110 is used to feed a signal to the antenna structure 100. The grounding unit 140 is connected to the feeding unit 110 and is used to provide grounding for the antenna structure 100. The first radiating unit 120 and the grounding unit 140 are distributed on both sides of the feeding unit 110. The first radiating unit 120 includes a first radiating section 121 and a second radiating section 122, the first radiating section 121 is connected to the feeding unit 110, and the second radiating section 122 is connected to one side of the first radiating section 121.

[0063] The second radiation unit 130 and the first radiation unit 120 are arranged in the same plane. The second radiation unit 130 includes a third radiation section 131, a fourth radiation section 132, a fifth radiation section 133 and a sixth radiation section 134. One end of the third radiation section 131 is vertically connected to one end of the second radiation section 122, and the third radiation section 131 extends in a direction parallel to the first radiation section 121 and away from the ground unit 140. One end of the fourth radiation section 132 is vertically connected to the end of the third radiation section 131, and the fourth radiation section 132 extends in a direction parallel to the second radiation section 122 and away from the third radiation section 131. The fifth radiation section 133 is vertically connected to one side of the fourth radiation section 132, and extends in a direction parallel to the third radiation section 131 and away from the second radiation section 122. The sixth radiation section 134 is vertically connected to the other side of the fourth radiation section 132, and extends in a direction parallel to the third radiation section 131 and close to the second radiation section 122.

[0064] The first radiation unit 120 is used to radiate radiation signals of a first frequency band, and the second radiation unit 130 is used to radiate radiation signals of a second frequency band, and the frequency corresponding to the second frequency band is lower than the frequency corresponding to the first frequency band.

[0065] In the antenna structure 100 of the embodiment of the present application, the first radiation unit 120 is formed by connecting the first radiation section 121 and the second radiation section 122, and the second radiation unit 130 is formed by connecting the third radiation section 131, the fourth radiation section 132, the fifth radiation section 133 and the sixth radiation section 134. The first radiation unit 120 is connected with the second radiation unit 130 through the second radiation section 122 and the third radiation section 131, so that the structure of the antenna structure 100 is compact and the size of the antenna structure 100 can be reduced. The first radiation unit 120 is used to radiate the radiation signal of the first frequency band, and the second radiation unit 130 is used to radiate the radiation signal of the second frequency band, so that the antenna structure 100 can radiate the radiation signal of two different frequency bands, so that the antenna structure 100 can cover the communication signals of the two frequency bands. Therefore, the embodiment of the present application can achieve the coverage of the communication signals of the two frequency bands while reducing the size of the antenna structure 100.

[0066] In some embodiments, the first frequency band is 5.0-7.125 GHz, and the second frequency band is 2.33-2.51 GHz. The first frequency band may have two resonant frequency points, 5.5 GHz and 6.5 GHz, respectively. The resonant frequency point of the second frequency band may be 2.45 GHz.

[0067] In some embodiments, the first radiating section 121 is rectangular and has a first slot 135, and the first side A of the first radiating section 121 is connected to the feeding unit 110. The second radiating section 122 is straight, and the second radiating section 122 is vertically connected to the second side B of the first radiating section 121 that is perpendicular to the first side A, so as to form an L-shaped structure with the first radiating section 121. The third radiating section 131 is straight and has a second slot 136 along the length direction of the third radiating section 131. The first slot 135 and the second slot 136 are used to increase the resonant impedance bandwidth of the antenna structure 100, so that the antenna structure 100 has a wider impedance bandwidth, and the antenna structure 100 forms a slot antenna, so that the antenna structure 100 has the advantages of low profile and wide impedance bandwidth. In addition, the input impedance of the antenna structure 100 can be adjusted and the impedance bandwidth can be increased through the first slot 135 and the second slot 136, so that the size of the first slot 135 and the second slot 136 can be changed to make the antenna structure 100 meet the design requirements.

[0068] Please continue reading Figure 1 and Figure 2 In some embodiments, the fifth radiation segment 133 and the sixth radiation segment 134 are both in the shape of straight strips and are arranged in a collinear manner.

[0069] In some embodiments, the second radiation segment 122 , the third radiation segment 131 , the fourth radiation segment 132 , the fifth radiation segment 133 and the sixth radiation segment 134 have the same width, while the width of the first radiation segment 121 is greater than that of the second radiation segment 122 .

[0070] In some embodiments, the grounding unit 140 is disposed coplanarly with the first radiation unit 120 and the second radiation unit 130. Of course, in other specific examples, the grounding unit 140 and the first radiation unit 120 and the second radiation unit 130 may not be coplanar, for example, the plane where the grounding unit 140 is located is parallel to the plane where the first radiation unit 120 and the second radiation unit 130 are located.

[0071] Specifically, Figure 1 As shown, the grounding unit 140 is disposed coplanarly with the first radiation unit 120 , and the grounding unit 140 includes a first grounding segment 141 , a second grounding segment 142 , a third grounding segment 143 , a fourth grounding segment 144 and a fifth grounding segment 145 .

[0072] The first grounding segment 141 is connected to the feeding unit 110, and extends in a direction parallel to the first radiating segment 121 and away from the feeding unit 110. The second grounding segment 142 is connected to one side of the first grounding segment 141, and extends in a direction parallel to the second radiating segment 122 and away from the feeding unit 110. One end of the third grounding segment 143 is vertically connected to the end of the second grounding segment 142, and extends in a direction parallel to the first grounding segment 141 and away from the feeding unit 110. The fourth grounding segment 144 is vertically connected to the end of the third grounding segment 143, and extends in a direction parallel to the second grounding segment 142 and close to the feeding unit 110. One end of the fifth grounding segment 145 is vertically connected to the fourth grounding segment 144, and extends in a direction parallel to the third grounding segment 143 and close to the feeding unit 110. That is, the grounding unit 140 can form a structure similar to that formed by the first radiating unit 120 and the second radiating unit 130, so that the antenna structure 100 is more compact.

[0073] Furthermore, the first grounding segment 141 is in a straight strip shape and is disposed in a collinear relationship with the first radiating segment 121 , and the fifth grounding segment 145 is in a straight strip shape and is disposed in a collinear relationship with the fifth radiating segment 133 and the sixth radiating segment 134 .

[0074] In some embodiments, the width of the first grounding segment 141 is the same as the width of the first radiating segment 121 , and the width of the fifth grounding segment 145 is the same as the width of the fifth radiating segment 133 and the sixth radiating segment 134 .

[0075] In some embodiments, the feeding unit 110 is a coaxial cable, the first radiating unit 120 is connected to the inner conductor of the coaxial cable to receive the feeding signal, and the grounding unit 140 is connected to the outer conductor of the coaxial cable for grounding, so that the first radiating unit 120, the second radiating unit 130 and the grounding unit 140 of the antenna structure 100 form a loop, ensuring the impedance matching of the antenna structure 100, so that the antenna structure 100 radiates the signal with maximum efficiency. In the simulation design of the antenna structure 100 of the embodiment of the present application, the feeding unit 110 can be set as an excitation port, the end face of the excitation port can be set as a reference ground, and the excitation port can be fed by a lumped port to simulate the signal input.

[0076] In the embodiment of the present application, the second radiation segment 122, the third radiation segment 131, the fourth radiation segment 132, the fifth radiation segment 133, the sixth radiation segment 134, the first grounding segment 141, the second grounding segment 142, the third grounding segment 143, the fourth grounding segment 144 and the fifth grounding segment 145 are all roughly straight strip-shaped, and the first radiation segment 121 is roughly rectangular.

[0077] Since adding the first slot 135 to the first radiation section 121 and opening the second slot 136 in the third radiation section 131 will increase the impedance bandwidth of the antenna structure 100, and the sizes of the first slot 135 and the second slot 136 will obviously also affect the impedance bandwidth, when designing the antenna structure 100 of the embodiment of the present application, the width W1 of the first slot 135 and the width W2 of the second slot 136 can be adjusted, and the return loss diagram is obtained by simulation under different values ​​of the width W1 of the first slot 135 and the width W2 of the second slot 136, so as to obtain W1 and W2 when the antenna structure 100 has the best performance. Figure 3 and Figure 4 As shown, Figure 3 FIG. 4 shows a return loss curve of the antenna structure 100 as the width W1 of the first slot 135 changes. Figure 4 FIG. 1 shows a return loss curve of the antenna structure 100 as the width W2 of the second slot 136 changes. Figure 3 and Figure 4 It can be seen that as the width W1 of the first slot 135 and the width W2 of the second slot 136 increase, the first resonant frequency point and the second resonant frequency point of the first frequency band will become smaller. When W1=1.3mm and W2=0.5mm, the impedance bandwidth of the first frequency band is the widest and the performance of the antenna structure 100 is the best.

[0078] It is understandable that the size changes of other parts in the antenna structure 100 will also affect the performance of the antenna structure 100, for example, the length L1 of the first radiation section 121 and the length L2 of the fifth radiation section 133. Therefore, when designing the antenna structure 100 of the embodiment of the present application, the length L1 of the first radiation section 121 and the length L2 of the fifth radiation section 133 can be adjusted, and the return loss diagram is obtained by simulation under different values ​​of the length L1 of the first radiation section 121 and the length L2 of the fifth radiation section 133, so as to obtain L1 and L2 when the antenna structure 100 has the best performance. Figure 5 and Figure 6 As shown, Figure 5 FIG. 4 shows a return loss curve of the antenna structure 100 as the length L1 of the first radiation section 121 changes. Figure 6 FIG. 1 shows a return loss curve of the antenna structure 100 as the length L2 of the fifth radiation section 133 changes. Figure 5 It can be seen that as the length L1 of the first radiation segment 121 increases, the first resonant frequency point and the second resonant frequency point of the first frequency band will decrease, and the impact on the resonant frequency point of the second frequency band is relatively small. Figure 6It can be seen that as the length L2 of the fifth radiation segment 133 increases, the first resonant frequency point and the second resonant frequency point of the first frequency band will increase, and the resonant frequency point of the second frequency band will decrease. Therefore, by adjusting the length L1 of the first radiation segment 121 and the length L2 of the fifth radiation segment 133, the resonant frequency points of the first frequency band and the second frequency band can be changed, and the antenna structure 100 can meet the design requirements.

[0079] In some specific examples, such as Figure 2 As shown, the overall dimensions of the antenna structure 100 are as follows: the length L1 of the first radiation section 121 is 4.8 mm, the length L2 of the fifth radiation section 133 is 6.5 mm, the length L3 of the second radiation section 122 is 5.6 mm, the length L4 of the first slot 135 is 2.5 mm, the length of the second slot 136 is 10 mm (not marked in the figure), the length L5 of the third radiation section 131 is 12 mm, the length L6 of the sixth radiation section 134 is 9.5 mm, the interval H0 between the third radiation section 131 and the sixth radiation section 134 is 1 mm, the width W1 of the first slot 135 is 1.3 mm, the width W2 of the second slot 136 is 0.5 mm, the first radiation section 121, the third radiation section 131, the fourth radiation section 132, the fifth radiation section 133 and the sixth radiation section 134 are 1 mm, and the width W2 of the first slot 135 is 1.3 mm. The width W3 of the segment 134 is 2 mm, and the width W4 of the second radiation segment 122 is 3.7 mm; the length L7 of the first grounding segment 141 is 10 mm, the length L8 of the second grounding segment 142 is 5.5 mm, the length L9 of the third grounding segment 143 is 15 mm, the length L10 of the fourth grounding segment 144 is 5 mm, the length L11 of the fifth grounding segment 145 is 8 mm, the width W5 of the second grounding segment 142 is 3 mm, the width of the first grounding segment 141 is the same as the width W4 of the first radiation segment 121, which is 3.7 mm, the widths of the third grounding segment 143, the fourth grounding segment 144 and the fifth grounding segment 145 are all the same as the width W3 of the second radiation segment 122, which is 2 mm, and the interval H0 between the third grounding segment 143 and the fifth grounding segment 145 is 1 mm.

[0080] See also Figure 7 , Figure 7The return loss diagram of the antenna structure 100 in this example is shown. In this example, when the return loss S11<-10dB, the working frequency bands of the antenna structure 100 include 5.0~7.125GHz and 2.33~2.51GHz, that is, the first frequency band of the antenna structure 100 is 5.0~7.125GHz, the second frequency band is 2.33~2.51GHz, the first resonant frequency point and the second resonant frequency point corresponding to the first frequency band are 5.5GHz and 6.5GHz respectively, and the resonant frequency point corresponding to the second frequency band is 2.45GHz, so that the antenna structure 100 in this example can basically cover all frequency bands of WLAN (2.4G, 5G, 6G). The relative impedance bandwidth corresponding to the first frequency band is 35.1%, and the relative impedance bandwidth corresponding to the second frequency band is 7.4%. The impedance bandwidths of the first frequency band and the second frequency band can both meet the broadband requirements, and the relative impedance bandwidth of the first frequency band reaches 35.1%, so that the antenna structure 100 in this example has good radiation performance in the high frequency band.

[0081] Please also read Figures 8 to 10 , Figure 8 is a current distribution diagram of the antenna structure 100 of this example at a first resonant frequency point corresponding to a first frequency band, Fig. 9 is a current distribution diagram of the antenna structure 100 of this example at the second resonant frequency point corresponding to the first frequency band, Fig.10 is a current distribution diagram of the antenna structure 100 of this example at the resonant frequency point corresponding to the second frequency band. Figure 8 and Fig. 9 It can be seen that when in the first frequency band (5.0-7.125 GHz), the current on the antenna structure 100 is mainly distributed on the first radiation unit 120, indicating that the radiation signal of the first frequency band is mainly generated by the first radiation unit 120, that is, the first radiation unit 120 is mainly used to radiate the radiation signal of the high frequency band. Fig.10 It can be seen that when in the second frequency band (2.33~2.51GHz), the current on the antenna structure 100 is mainly distributed on the second radiation unit 130, indicating that the radiation signal of the second frequency band is mainly generated by the second radiation unit 130, that is, the second radiation unit 130 is mainly used to radiate the radiation signal of the low frequency band.

[0082] Please refer to Figures 11 to 13 , Fig.11 is the radiation pattern of the antenna structure 100 of this example at the first resonant frequency point in the first frequency band, Fig.12 is the radiation pattern of the antenna structure 100 of this example at the second resonant frequency point in the first frequency band, Fig.13: is the radiation pattern of the antenna structure 100 of this example at the resonant frequency point of the second frequency band, wherein the dotted line is the radiation pattern on the E plane (Phi=0deg), and the solid line is the radiation pattern on the H plane (Phi=90deg).

[0083] according to Fig.11 It can be seen that when the antenna structure 100 is at the first resonant frequency point (5.5GHz) in the first frequency band, the radiation pattern on the E plane (Phi=0deg) is an irregular "8" shape, with a maximum gain of 2.86dB, and the gain in some areas of the E plane is attenuated, but the overall radiation characteristics are still relatively good; while on the H plane (Phi=90deg), the radiation pattern is circular, with a maximum gain of 3.94dB, and has omnidirectional radiation characteristics on the H plane.

[0084] according to Fig.12 It can be seen that when the antenna structure 100 is at the second resonant frequency point (6.5GHz) in the first frequency band, the radiation pattern on the E-plane (Phi=0deg) is an irregular "butterfly" shape, with a maximum gain of 3.62dB, and the gain in some areas of the E-plane is attenuated, but the overall radiation characteristics are still relatively good; while on the H-plane (Phi=90deg), the radiation pattern is circular, with a maximum gain of 4.15dB, and has omnidirectional radiation characteristics on the H-plane.

[0085] according to Fig.13 It can be seen that when the antenna structure 100 is at the resonant frequency point (2.45GHz) of the second frequency band, the radiation pattern on the E-plane (Phi=0deg) is an irregular "8" shape, with a maximum gain of 2.1dB. The gain in some areas of the E-plane is attenuated, but the overall radiation characteristics are still relatively good; and the radiation pattern on the H-plane (Phi=90deg) is circular, with a maximum gain of 2.1dB, and has omnidirectional radiation characteristics on the H-plane.

[0086] The antenna structure 100 of this example has good radiation performance at three resonant frequency points, and can meet the design requirements of the antenna structure 100 .

[0087] As described above, the antenna structure 100 of the embodiment of the present application has a compact structure, a small volume, and has the characteristics of a low profile, a wide bandwidth, and a high radiation efficiency, thereby achieving a small volume without affecting the performance of the antenna structure 100.

[0088] The embodiment of the present application also provides a wireless communication device (not shown), which includes a printed circuit board and the aforementioned antenna structure 100. The antenna structure 100 is arranged on a printed circuit substrate 200. The printed circuit substrate 200 is connected to a feeding unit 110 to provide a feeding signal and grounding for the antenna structure 100.

[0089] In some embodiments, the antenna structure 100 can be formed by etching on the printed circuit substrate 200, thereby further reducing the space required for the antenna structure 100 in the wireless communication device, and can reduce the cost of the antenna structure 100 and reduce the difficulty of processing.

[0090] Furthermore, the printed circuit substrate 200 is made of a flexible material, has a thickness of 0.05 mm, a relative dielectric constant of 3.5, a length L of 44 mm, and a width W of 10.5 mm. Since the printed circuit substrate 200 is made of a flexible material and can be bent, the printed circuit substrate 200 etched with the antenna structure 100 can be flexibly installed in various narrow and tortuous spaces. The material of the printed circuit substrate 200 can be, but is not limited to, polyimide.

[0091] 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: A feeding unit, the feeding unit is used to feed a signal into the antenna structure; A grounding unit, the grounding unit is connected to the feeding unit and is used to provide grounding for the antenna structure; a first radiating unit, wherein the first radiating unit and the grounding unit are respectively arranged at two sides of the feeding unit, the first radiating unit comprises a first radiating section and a second radiating section, the first radiating section is connected to the feeding unit, and the second radiating section is connected to one side of the first radiating section; and A second radiation unit, wherein the second radiation unit and the first radiation unit are arranged in the same plane, and the second radiation unit comprises a third radiation segment, a fourth radiation segment, a fifth radiation segment and a sixth radiation segment; one end of the third radiation segment is vertically connected to one end of the second radiation segment, and extends in a direction parallel to the first radiation segment and away from the grounding unit; the fourth radiation segment is vertically connected to the end of the third radiation segment, and extends in a direction parallel to the second radiation segment and away from the third radiation segment; the fifth radiation segment is vertically connected to one side of the fourth radiation segment, and extends in a direction parallel to the third radiation segment and away from the second radiation segment; the sixth radiation segment is vertically connected to the other side of the fourth radiation segment, and extends in a direction parallel to the third radiation segment and close to the second radiation segment; The first radiation unit is used to radiate signals in a first frequency band, and the second radiation unit is used to radiate signals in a second frequency band, and the frequency of the second frequency band is lower than the frequency of the first frequency band.

2. The antenna structure according to claim 1, characterized in that: The first radiating section is rectangular and has a first slot, a first side of the first radiating section is connected to the feeding unit, the second radiating section is straight, and the second radiating section is vertically connected to a second side of the first radiating section that is perpendicular to the first side, so as to form an L-shaped structure with the first radiating section; The third radiation section is in a straight strip shape and has a second slot along the length direction of the third radiation section; The first slot and the second slot are used to increase the resonant impedance bandwidth of the antenna structure.

3. The antenna structure according to claim 1, characterized in that: The fifth radiation section and the sixth radiation section are both in a straight strip shape and are collinearly arranged.

4. The antenna structure according to any one of claims 1 to 3, characterized in that: The second radiation section, the third radiation section, the fourth radiation section, the fifth radiation section and the sixth radiation section have the same width; The width of the first radiation section is greater than the width of the second radiation section.

5. The antenna structure according to claim 1, characterized in that: The grounding unit is arranged coplanar with the first radiation unit and the second radiation unit; or The plane where the grounding unit is located is arranged in parallel with the plane where the first radiation unit and the second radiation unit are located.

6. The antenna structure according to claim 1, characterized in that: The grounding unit is arranged coplanar with the first radiation unit, and the grounding unit includes a first grounding segment, a second grounding segment, a third grounding segment, a fourth grounding segment and a fifth grounding segment; The first grounding segment is connected to the feeding unit, and extends in a direction parallel to the first radiating segment and away from the feeding unit; the second grounding segment is connected to one side of the first grounding segment, and extends in a direction parallel to the second radiating segment and away from the feeding unit; one end of the third grounding segment is vertically connected to the end of the second grounding segment, and extends in a direction parallel to the first grounding segment and away from the feeding unit; the fourth grounding segment is vertically connected to the end of the third grounding segment, and extends in a direction parallel to the second grounding segment and close to the feeding unit; the fifth grounding segment is vertically connected to one side of the fourth grounding segment, and extends in a direction parallel to the third grounding segment and close to the feeding unit.

7. The antenna structure according to claim 6, characterized in that: The first grounding segment is in a straight strip shape and is disposed in a collinear relationship with the first radiating segment. The fifth grounding segment is in a straight strip shape and is disposed in a collinear relationship with the fifth radiating segment and the sixth radiating segment.

8. The antenna structure according to claim 6, characterized in that: The width of the first grounding segment is the same as that of the first radiation segment, and the width of the fifth grounding segment is the same as that of the fifth radiation segment and the sixth radiation segment.

9. The antenna structure according to claim 1, characterized in that: The feeding unit is a coaxial cable, the first radiation unit is connected to an inner conductor of the coaxial cable, and the grounding unit is connected to an outer conductor of the coaxial cable.

10. A wireless communication device, characterized in that: The wireless communication device comprises a printed circuit substrate and an antenna structure as claimed in any one of claims 1 to 9, wherein the antenna structure is arranged on the printed circuit substrate, and the printed circuit substrate is connected to the feeding unit to provide a feeding signal and grounding for the antenna structure.

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