A dual-band antenna and wireless communication device

Abstract

The application relates to a dual-frequency antenna and a wireless communication device, which comprises a dielectric plate, a feeding terminal, a first frequency band dipole antenna and a second frequency band dipole antenna, the feeding terminal being arranged on the dielectric plate; the first frequency band dipole antenna comprises two first oscillator arms arranged on the dielectric plate, the two first oscillator arms respectively extending in opposite directions from the positive pole and the negative pole of the feeding terminal as starting points; the second frequency band dipole antenna comprises two second oscillator arms arranged on the dielectric plate, the two second oscillator arms respectively extending in opposite directions from the positive pole and the negative pole of the feeding terminal as starting points, so that the first frequency band dipole antenna and the second frequency band dipole antenna are cross-distributed; a gap radiation matching branch is connected between the first oscillator arm with one of the positive pole and the negative pole as a starting point and the second oscillator arm with the other of the positive pole and the negative pole as a starting point. The application can improve the antenna impedance matching effect and the radiation efficiency.

Description

TECHNICAL FIELD

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

[0002] With the gradual application of wireless communication technologies such as 5G, WiFi6, WiFi7, the number of terminal antennas increases exponentially, resulting in smaller and smaller antenna spacing, higher and higher requirements for terminal antenna multi-band and miniaturization, and increasingly significant challenges to realizing terminal antenna miniaturization, multi-band, high isolation, and high radiation efficiency.

[0003] Conventional dual-frequency antennas have only one polarization. When the antenna is placed vertically and horizontally covered, the height is more than 30 mm, the size is high, and it does not meet the antenna height limit when the gateway is placed horizontally, which limits the structure layout.

[0004] The dual-frequency antenna commonly used at present basically adopts the design idea of adopting a dipole or an IFA form to realize dual-frequency or wide-frequency radiation by combining radiation arms of different lengths. The dual-frequency antenna of this form can only achieve about 1 / 2 to 1 / 3 of the low-frequency wavelength, and the size of the dual-frequency antenna working in the WiFi frequency band is about 40 mm x 15 mm, which is difficult to meet the requirements of miniaturization and horizontal plane coverage.

[0005] In addition, WiFi6 and WiFi7 have opened the high-frequency part of 5.9-7.1 GHz, and it is difficult to maintain antenna impedance matching and high radiation efficiency in the full frequency band (2.4-2.5 GHz, 5.1-7.1 GHz) of WiFi6 to WiFi7. SUMMARY

[0006] The embodiments of the present application provide a dual-frequency antenna and a wireless communication device, which can improve the antenna impedance matching effect and radiation efficiency.

[0007] In a first aspect, a dual-frequency antenna is provided, which includes:

[0008] a dielectric plate;

[0009] a feeding end provided on the dielectric plate;

[0010] a first frequency band dipole antenna including two first dipole arms provided on the dielectric plate, the two first dipole arms respectively extending in opposite directions from the positive and negative poles of the feeding end as starting points;

[0011] a second frequency band dipole antenna including two second dipole arms provided on the dielectric plate, the two second dipole arms respectively extending in opposite directions from the positive and negative poles of the feeding end as starting points, so that the first frequency band dipole antenna and the second frequency band dipole antenna are distributed in a cross manner.

[0012] and, between the first dipole arm with one of the positive and negative poles as the starting point and the second dipole arm with the other of the positive and negative poles as the starting point, a slot radiation matching branch is connected.

[0013] In some embodiments, the first and second dipole arms with the positive pole of the feeding end as the starting point are connected to the positive pole of the feeding end to form a positive pole structure;

[0014] the first and second dipole arms with the negative pole of the feeding end as the starting point are connected to the negative pole of the feeding end to form a negative pole structure;

[0015] the positive pole structure and the negative pole structure have a gap at the position of the feeding end;

[0016] the slot radiation matching branch is configured to make the perimeter of the slot formed by the first and second dipole arms connected by the slot radiation matching branch be between the half wavelength of the first frequency band dipole antenna and the half wavelength of the second frequency band dipole antenna.

[0017] In some embodiments, the frequency range of the slot radiation mode generated by the slot is 5.1GHz-7.1GHz;

[0018] Alternatively, the positive and negative poles of the feeding end are arranged left and right or up and down.

[0019] In some embodiments, the extension directions of the first and second dipole arms with the positive or negative pole as the starting point are perpendicular or not perpendicular.

[0020] In some embodiments, the two first dipole arms have the same structure and are centrally symmetric about the feeding end.

[0021] In some embodiments, the first dipole arm includes a first segment, a second segment and a third segment;

[0022] One end of the first segment is connected to the feeding end, and the other end extends towards the long side or the short side of the dielectric plate and is connected to one end of the second segment;

[0023] The other end of the second segment extends along the long side or the short side of the dielectric plate and is connected to one end of the third segment;

[0024] The other end of the third segment extends along the short side or the long side of the dielectric plate so that the third segment is perpendicular to the second segment;

[0025] The third segment and the first segment are arranged on the same side of the second segment.

[0026] In some embodiments, the third segment has a width greater than that of the second segment, so that the third segment has a square structure, a triangular structure or a trapezoidal structure.

[0027] Alternatively, the third segment has a bent structure.

[0028] Alternatively, the third segment has a bent structure.

[0029] In some embodiments, the two second-vibrator arms have the same structure and are centrally symmetric about the feed end.

[0030] In some embodiments, the first-frequency-band dipole antenna has a frequency band of 2.4-2.5 GHz.

[0031] The second-frequency-band dipole antenna has a frequency band of 5.1-7.1 GHz.

[0032] In a second aspect, a wireless communication device is provided, which includes the dual-frequency antenna according to any of the above.

[0033] The technical scheme provided by the present application has the following beneficial effects:

[0034] The dual-frequency antenna provided by the present application introduces cross-vibrator arms and a slot radiation matching stub in a conventional dual-frequency dipole antenna design. The cross-vibrator arm structure can realize polarization crossing of high-frequency-band and low-frequency-band signals, complementary horizontal plane patterns, and rich polarization characteristics, which can effectively improve terminal performance in complex scenarios. The slot radiation matching stub has a dual role. On the one hand, it can produce a new slot radiation mode in the slot formed between the high-frequency-band and low-frequency-band signal vibrator arms, thereby greatly improving the matching bandwidth of the high-frequency band. On the other hand, because the high-frequency-band vibrator arm is connected to the low-frequency-band vibrator arm, the excess capacitance generated thereby can cause the antenna impedance of the low-frequency band to be mismatched. The inductive characteristic of the slot radiation matching stub can offset this capacitance to achieve matching of the antenna impedance of the low-frequency band. Therefore, the present application can improve the antenna impedance matching effect and the radiation efficiency, thereby achieving the purposes of antenna miniaturization and high bandwidth. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort.

[0036] Figure 1 A schematic diagram of a dual-band antenna according to an embodiment of the present application;

[0037] Figure 2 A schematic diagram of a dual-band antenna according to another embodiment of the present application;

[0038] Figure 3 A schematic diagram of a dual-band antenna according to another embodiment of the present application;

[0039] Figure 4 A schematic diagram of a dual-band antenna according to another embodiment of the present application;

[0040] Figure 5 A schematic diagram of a slot radiation matching stub according to an embodiment of the present application, wherein a is a first slot radiation matching stub, b is a second slot radiation matching stub, c is a third slot radiation matching stub, and d is a fourth slot radiation matching stub;

[0041] Figure 6 A schematic diagram of S parameters according to an embodiment of the present application;

[0042] Figure 7 A 2.4 GHz 3D radiation pattern according to an embodiment of the present application;

[0043] Figure 8 A 5.8 GHz 3D radiation pattern according to an embodiment of the present application;

[0044] Figure 9 A 6.1 GHz electric field intensity distribution according to an embodiment of the present application;

[0045] Figure 10 A radiation efficiency according to an embodiment of the present application;

[0046] Figure 11 A schematic diagram of a dual-band antenna according to another embodiment of the present application;

[0047] Figure 12 A schematic diagram of a dual-band antenna according to another embodiment of the present application.

[0048] In the figure: 1, dielectric plate; 2, feed end; 3, first dipole arm; 30, first segment; 31, second segment; 32, third segment; 33, fourth segment; 4, second dipole arm; 5, slot radiation matching stub; 6, gap. DETAILED DESCRIPTION

[0049] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will be combined with the accompanying drawings for the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0050] Referring to Figure 1 , Figure 2 , Figure 3 and Figure 4 , the embodiments of the present application provide a dual-frequency antenna, which comprises a dielectric board 1, a feeding terminal 2, a first frequency band dipole antenna and a second frequency band dipole antenna.

[0051] It can be understood that the dielectric board 1 as a carrier of the dual-frequency antenna can be determined according to actual needs. For example, for the convenience of understanding, in the embodiments of the present application, the dielectric board 1 adopts a rectangular shape, and the long-side length extension direction is taken as the horizontal direction and the short-side length extension direction is taken as the vertical direction. Figure 1 In the formula, L1 represents the length of the dielectric board, and L2 represents the width of the dielectric board.

[0052] The feeding terminal 2 is arranged on the dielectric board 1 and is used to transmit the signal output by the radio frequency module to the first frequency band dipole antenna and the second frequency band dipole antenna, or receive the signal transmitted by the first frequency band dipole antenna and the second frequency band dipole antenna. In the embodiments of the present application, the feeding terminal 2 is arranged at the center position of the dielectric board 1.

[0053] It can be understood that the first frequency band and the second frequency band have different frequency ranges, so that one of them is relatively low frequency band and the other is relatively high frequency band. The first frequency band and the second frequency band can be WiFi dual frequency, GSM dual frequency or CDMA dual frequency, so as to meet the use requirements of the wireless communication device. As a preferred example, the dual-frequency antenna in the present application is a WiFi dual-frequency antenna, that is, the first frequency band in which the first frequency band dipole antenna works is 2.4-2.5 GHz, and the second frequency band in which the second frequency band dipole antenna works is 5.1-7.1 GHz.

[0054] The first frequency band dipole antenna comprises two first dipole arms 3 arranged on the dielectric plate 1, and the two first dipole arms 3 extend in opposite directions from the positive and negative poles of the feeding end 2 respectively, so as to improve the radiation efficiency of the antenna and reduce the mutual influence between the antennas; the second frequency band dipole antenna comprises two second dipole arms 4 arranged on the dielectric plate 1, and the two second dipole arms 4 extend in opposite directions from the positive and negative poles of the feeding end 2 respectively, so as to cross-distribute the first frequency band dipole antenna and the second frequency band dipole antenna, and the extension in opposite directions can improve the radiation efficiency of the antenna and reduce the mutual influence between the antennas.

[0055] It can be understood that, in order to prevent short circuit, the feeding end 2 has a positive pole and a negative pole, which makes a gap 6 exist at the position of the feeding end 2. It can also be understood that, as shown in Figure 1 the feeding end 2 shows two feeding points (i.e. the structure shown by taking a black square as an example in the figure), one of which is a positive pole and the other is a negative pole, and among the two feeding points, the larger one is a feeding outlet point. Between the first dipole arm 3 taking one of the positive pole and the negative pole as a starting point and the second dipole arm 4 taking the other of the positive pole and the negative pole as a starting point, a slot radiation matching branch 5 is connected.

[0056] The double-frequency antenna provided in the application introduces cross-dipole arms and slot radiation matching branches in the design of a conventional double-frequency dipole antenna. The cross-dipole arm structure can realize polarization crossing of high and low frequency band signals, complementary horizontal plane patterns, and rich polarization characteristics, which can effectively improve the terminal performance in a complex scene. The slot radiation matching branch has a dual role. On the one hand, a new slot radiation mode can be generated at the slot surrounded by the slot radiation matching branch and the dipole arms of the high and low frequency band signals, thereby greatly improving the matching bandwidth of the high frequency band. On the other hand, because the dipole arm of the high frequency band is connected to the dipole arm of the low frequency band, the excess capacitance generated thereby will cause the impedance of the low frequency band antenna to be mismatched. The inductive characteristic of the slot radiation matching branch can offset this capacitance to realize the matching of the impedance of the low frequency band antenna. Therefore, the application can improve the antenna impedance matching effect and the radiation efficiency, thereby realizing the purpose of antenna miniaturization and high bandwidth.

[0057] Referring to Figure 1As shown, the first vibrator arm 3 and the second vibrator arm 4 connected to the positive pole of the feeding end 2 are taken as the starting point of the positive pole structure, and the first vibrator arm 3 and the second vibrator arm 4 connected to the negative pole of the feeding end 2 are taken as the starting point of the negative pole structure; there is a gap 6 between the positive pole structure and the negative pole structure at the position of the feeding end 2, and the width of the gap 6 can be determined according to actual needs, mainly to prevent welding short circuit; the slot radiation matching branch 5 is configured to: the circumference of the slot formed by the first vibrator arm 3 and the second vibrator arm 4 connected by the slot radiation matching branch 5 is between the half wavelength of the first frequency band dipole antenna and the half wavelength of the second frequency band dipole antenna.

[0058] For ease of understanding, see Figure 1 As shown, the slot formed by the first vibrator arm 3 and the second vibrator arm 4 connected by the slot radiation matching branch 5 is Figure 1 The area marked by the diagonal line, and the outer contour of the area is the developed circumference of the slot.

[0059] In this application, a new slot radiation mode can be generated at the slot formed by the slot radiation matching branch 5 and the first vibrator arm 3 and the second vibrator arm 4, and the frequency range of the new slot radiation mode can be adjusted according to the developed circumference of the slot.

[0060] For example, a new slot radiation mode with a frequency range of 5.1GHz-7.1GHz can be generated at the formed slot.

[0061] Moreover, the position of the slot radiation matching branch and the first vibrator arm 3, as well as the length and thickness of the slot radiation matching branch, can be adjusted to finely adjust the inductance and offset the excess capacitance caused by the connection of the vibrator arm of the 5G frequency band to the vibrator arm of the 2.4G frequency band, so as to realize 2.4G impedance matching.

[0062] It can be understood that, since the slot radiation matching branch can be designed according to actual needs, the structure thereof can be variously changed, including length, thickness, and position connected to the first vibrator arm 3 and the second vibrator arm 4. Figure 5 As shown, this application provides four specific examples of slot radiation matching branches.

[0063] It is understandable that when the first-band dipole antenna and the second-band dipole antenna are interleaved, the angle of intersection does not need to be orthogonal. That is, the extension directions of the first dipole arm 3 and the second dipole arm 4, starting from the positive or negative pole, can be perpendicular or not perpendicular, i.e., the angle θ = 90° or θ ≠ 90°. This interleaved layout can improve the non-circularity of the horizontal radiation pattern of the dual-band antenna. For different aspect ratios of the dielectric substrate, the angle θ between the first dipole arm 3 and the second dipole arm 4 can be adjusted to improve the impedance matching of the 5G antenna. Generally, the smaller the aspect ratio of the dielectric substrate, the larger the angle θ.

[0064] It is understandable that the two first vibrating arms 3 have the same structure and are centrally symmetrical about the feed end 2. The rectangular dielectric substrate has the longest diagonal, and this arrangement can save the dielectric substrate area while achieving tilted antenna polarization characteristics and reducing the non-circularity of the horizontal plane radiation pattern.

[0065] It is understandable that, taking the operating frequency band of the first-band dipole antenna as a low-frequency band as an example, the first dipole arm 3 can be bent to increase its equivalent length under the size limitation of the dielectric substrate.

[0066] For example, see Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the first vibrator arm 3 includes a first segment 30, a second segment 31, and a third segment 32; one end of the first segment 30 is connected to the feed terminal 2, and the other end extends toward the long side edge (or short side edge) of the dielectric plate 1 and is connected to one end of the second segment 31; the other end of the second segment 31 extends along the long side edge (or short side edge) of the dielectric plate 1 and is connected to one end of the third segment 32; the other end of the third segment 32 extends along the short side edge (or long side edge) of the dielectric plate 1, so that the third segment 32 is perpendicular to the second segment 31; the third segment 32 and the first segment 30 are both located on the same side of the second segment 31.

[0067] It is understandable that the first segment 30 and the second segment 31 mentioned above can usually adopt a straight structure, and their length and width can be designed according to the equivalent length required in actual use.

[0068] There are also various structural forms that can be adopted for the third segment 32.

[0069] For example, see Figure 1 and Figure 4As shown, the width of the third segment 32 is greater than the width of the second segment 31, so that the third segment 32 has a square structure; for example, the width of the third segment 32 is greater than the width of the second segment 31, so that the third segment 32 has a triangular structure or a trapezoidal structure, and the like, and the length and width of the third segment 32 can be designed according to the actual equivalent length.

[0070] For example, as shown in Figure 2 As shown, the other end of the third segment 32 is also connected to a fourth segment 33, and the width of the fourth segment 33 is greater than the width of the third segment 32, so that the fourth segment 33 has a square structure, a triangular structure, or a trapezoidal structure. In the embodiment, the third segment 32 still has a straight line structure, and the length and width thereof can be designed according to the actual equivalent length, while the fourth segment 33 has a square structure, a triangular structure, or a trapezoidal structure, and the like. Similarly, the length and width of the fourth segment 33 can be designed according to the actual equivalent length.

[0071] For example, as shown in Figure 3 As shown, the third segment 32 has a bending structure, and the number of bending positions, the length, and the width of the third segment 32 can be designed according to the actual equivalent length.

[0072] It can be understood that the two second vibrator arms 4 have the same structure and are centrally symmetric about the feed end 2.

[0073] The second vibrator arm 4 can have a straight line structure, and the width thereof can be constant or gradually changed. The length and width of the second vibrator arm 4 can be designed according to the actual equivalent length.

[0074] The embodiments of the application also provide a wireless communication device comprising the dual-band antenna.

[0075] Embodiment one:

[0076] A dual-band antenna covering the full frequency band of WiFi 6 and WiFi 7, a rectangular medium plate, FR-4 substrate, thickness 1mm, length and width size L1=30mm, L2=20mm.

[0077] The first vibrator arm is a 2.4G vibrator arm, and the second vibrator arm is a 5G vibrator arm.

[0078] For example, as shown in Figure 1As shown, the upper end of the left 2.4G vibrator arm is connected to the lower end of the left 5G vibrator arm to form the positive pole of the feed end, the lower end of the 2.4G vibrator arm extends obliquely to the lower side of the dielectric plate to form a first section, then turns horizontally to form a second section, and the end is connected to a rectangular third section. The upper end of the 5G vibrator arm extends along the upper left side, and the included angle θ between the 2.4G vibrator arm and the 5G vibrator arm is greater than 90°.

[0079] The lower end of the right 2.4G vibrator arm is connected to the upper end of the right 5G vibrator arm to form the negative pole of the feed end, the upper end of the 2.4G vibrator arm extends obliquely to the upper side of the dielectric plate to form a first section, then turns horizontally to form a second section, and the end is connected to a rectangular third section. The lower end of the 5G vibrator arm extends along the lower right side and is parallel to the left 5G vibrator arm.

[0080] The slot radiation matching branch is connected between the left 2.4G vibrator arm and the right 5G vibrator arm, one end of the slot radiation matching branch is connected to the starting end of the left 2.4G vibrator arm, and the other end is connected to the starting end of the right 5G vibrator arm.

[0081] In order to generate a new 5.1-7.1 GHz frequency band slot radiation mode at the enclosed slot, the slot radiation matching branch needs to be folded to form two S-bends, so that the unfolded circumference of the slot is comparable to the wavelength of the slot radiation mode.

[0082] Example Two:

[0083] A dual-frequency antenna, which is different from example one, is as follows:

[0084] The width of the dielectric plate is narrowed, L1=30mm, L2=15mm.

[0085] Referring to Figure 2 As shown, the included angle θ between the left 2.4G vibrator arm and the left 5G vibrator arm is smaller.

[0086] The lower end of the left 2.4G vibrator arm extends obliquely to the lower side of the dielectric plate to form a first section, then turns horizontally to form a second section, continues to extend to the lower left corner of the dielectric plate, turns 90° to form a third section, and finally connects a rectangular fourth section at the end to increase the equivalent length of the 2.4G vibrator arm under the size limitation of the dielectric plate.

[0087] One end of the slot radiation matching branch is connected to the first section of the left 2.4G vibrator arm, so that the position where the slot radiation matching branch is connected to the 2.4G vibrator arm and the length of the slot radiation matching branch can offset the change in capacitive reactance caused by the size reduction of the dielectric plate, achieving 2.4G impedance matching.

[0088] The gap of the feed end is increased by bending, so that the positive pole and the negative pole are arranged in an up-down manner, achieving a vertical or small-angle inclined feed structure.

[0089] Example Three:

[0090] A dual-band antenna differs from Example One in that:

[0091] The length and width of the dielectric plate are both narrowed, L1 = 25 mm, L2 = 15 mm.

[0092] Referring to Figure 3 the left side of the 2.4G vibrator arm is inclined to extend to the upper side of the dielectric plate, forming a first segment, then turning horizontally to form a second segment, continuing to extend to the upper right corner of the dielectric plate, turning 90° and then continuing to bend back, forming a third segment, to increase the equivalent length under the size limit of the dielectric plate.

[0093] The gap radiation matching stub is connected to the turning point of the first segment and the second segment of the 2.4G vibrator arm. In this way, the position where the gap radiation matching stub is connected to the 2.4G vibrator arm, as well as the length of the gap radiation matching stub, can further offset the changes in capacitive reactance caused by the reduction in the size of the dielectric plate, achieving 2.4G impedance matching.

[0094] The gap of the feed end is bent, so that the positive and negative poles are arranged in an up-down manner, achieving a vertical or small-angle inclined feed structure.

[0095] Figure 6 The S-parameter diagram of Example Three is shown in Figure 7 the 2.4GHz 3D radiation pattern of Example Three is shown in Figure 8 the 5.8GHz 3D radiation pattern of Example Three is shown in, which illustrates that the inclined antenna polarization characteristics produce an inclined radiation pattern, reducing the horizontal pattern non-circularity and improving the horizontal coverage performance, Figure 9 the 6.1GHz electric field intensity distribution of Example Three is shown in Figure 10 the radiation efficiency diagram of Example Three is shown in.

[0096] The S-parameter diagram shows that the return loss is less than -10dB in the WiFi 6 to WiFi 7 full frequency band (2.4-2.5GHz, 5.1-7.1GHz).

[0097] The electric field intensity distribution diagram shows that a strong in-phase electric field radiation is generated between the gap radiation matching stub and the vibrator arm.

[0098] The radiation efficiency diagram shows that the radiation efficiency is greater than 80% in the WiFi 6 to WiFi 7 full frequency band (2.4-2.5GHz, 5.1-7.1GHz).

[0099] Example Four:

[0100] A dual-band antenna differs from Example One in that:

[0101] The width of the medium plate is narrowed, L1=30mm, L2=18.5mm.

[0102] Referring to Figure 4 As shown, the lower part of the slot radiation matching branch is away from the plate edge, the width is tapered, and the expansion length is basically unchanged, so that on the one hand, the 2.4G impedance matching can be realized, and on the other hand, the influence of the slot radiation matching branch on the 5G pattern can be reduced as much as possible.

[0103] Example five:

[0104] A dual-band antenna, which is different from example one in that:

[0105] Referring to Figure 11 As shown, the second segment is connected to the third segment in a right trapezoidal shape.

[0106] The feeding outlet point is close to the 2.4GHz vibrator arm and is not on the same side as the slot radiation matching branch.

[0107] Example six:

[0108] A dual-band antenna, which is different from example five in that:

[0109] Referring to Figure 12 As shown, the feeding outlet point is close to the 5GHz vibrator arm and is on the same side as the slot radiation matching branch.

[0110] In the description of the present application, it should be noted that the positions or position relationships indicated by the terms "upper", "lower" and the like are based on the positions or position relationships 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 devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, and it can be the communication between two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0111] It should be noted that, in the present application, the relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another, without necessarily requiring or implying any actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0112] The foregoing is merely illustrative of the principles of the application and various modifications can be made by those skilled in the art without departing from the spirit and scope of the application. The above embodiments are illustrative, and not restrictive, of the scope of the application.

Claims

1. A dual frequency antenna, characterized by It comprises: a dielectric plate (1); a feeding terminal (2) disposed on the dielectric plate (1); a first frequency band dipole antenna comprising two first dipole arms (3) disposed on the dielectric plate (1), the two first dipole arms (3) extending in opposite directions respectively from the positive and negative terminals of the feeding terminal (2); a second frequency band dipole antenna comprising two second dipole arms (4) disposed on the dielectric plate (1), the two second dipole arms (4) extending in opposite directions respectively from the positive and negative terminals of the feeding terminal (2), so that the first frequency band dipole antenna and the second frequency band dipole antenna are distributed in a cross manner; and, between the first dipole arm (3) starting from one of the positive and negative terminals and the second dipole arm (4) starting from the other of the positive and negative terminals, a slot radiation matching branch (5) is connected.

2. The dual-frequency antenna of claim 1, wherein: the first dipole arm (3) and the second dipole arm (4) starting from the positive terminal of the feeding terminal (2) are connected to the positive terminal of the feeding terminal (2) to form a positive terminal structure; the first dipole arm (3) and the second dipole arm (4) starting from the negative terminal of the feeding terminal (2) are connected to the negative terminal of the feeding terminal (2) to form a negative terminal structure; there is a gap (6) between the positive terminal structure and the negative terminal structure at the position of the feeding terminal (2); the slot radiation matching branch (5) is configured so that the perimeter of the slot formed by the slot radiation matching branch (5) connecting the first dipole arm (3) and the second dipole arm (4) is between the half-wavelength of the first frequency band dipole antenna and the half-wavelength of the second frequency band dipole antenna.

3. The dual-frequency antenna of claim 2, wherein: the frequency range of the slot radiation mode generated at the slot is 5.1 GHz-7.1 GHz; alternatively, the positive and negative terminals of the feeding terminal (2) are arranged side by side or one above the other.

4. The dual-frequency antenna of claim 1, wherein: the extension directions of the first dipole arm (3) and the second dipole arm (4) starting from the positive or negative terminal are perpendicular or not perpendicular.

5. The dual-frequency antenna of claim 1, wherein: the two first dipole arms (3) are structurally identical and are centrosymmetric about the feeding terminal (2).

6. The dual-frequency antenna of claim 5, wherein: the first dipole arm (3) comprises a first segment (30), a second segment (31), and a third segment (32); one end of the first segment (30) is connected to the feeding terminal (2), and the other end extends towards the long side or the short side of the dielectric plate (1) and is connected to one end of the second segment (31); the other end of the second segment (31) extends along the long side or the short side of the dielectric plate (1) and is connected to one end of the third segment (32). The other end of the third section (32) extends along the short side or the long side of the medium plate (1) so that the third section (32) is perpendicular to the second section (31); The third section (32) and the first section (30) are arranged on the same side of the second section (31).

7. The dual-band antenna of claim 6, wherein: The width of the third section (32) is greater than the width of the second section (31) so that the third section (32) is in a square structure, a triangular structure or a trapezoidal structure; Alternatively, the third section (32) is in a bent structure; Alternatively, the other end of the third section (32) is further connected with a fourth section (33), and the width of the fourth section (33) is greater than the width of the third section (32) so that the fourth section (33) is in a square structure, a triangular structure or a trapezoidal structure.

8. The dual-band antenna of claim 1, wherein: The two second dipole arms (4) are of the same structure and are centrally symmetric about the feed end (2).

9. The dual-band antenna of claim 1, wherein: The frequency band of the first frequency band dipole antenna is 2.4-2.5 GHz; The frequency band of the second frequency band dipole antenna is 5.1-7.1 GHz.

10. A wireless communication device, comprising: The dual-band antenna comprises any one of the dual-band antennas of claims 1-9.

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