Antenna and communication equipment

Abstract

The embodiment of the utility model relates to the technical field of antennas, and particularly discloses an antenna and communication equipment, and the antenna comprises a dielectric layer, a radiation layer, a feed layer and a radio frequency ground layer. The dielectric layer comprises a first surface and a second surface which are oppositely arranged; the radiation layer is arranged on the first surface, the radiation layer is provided with a first gap and a second gap, and the first gap and the second gap are oppositely arranged; the feed layer is arranged on the first surface, provided with a third gap and connected with the radiation layer; the radio frequency ground layer is arranged on the second surface, is provided with a gap, and is coupled with the radiation layer and the feed layer. Through the first slot, the second slot, the third slot and the notch in the mode, the embodiment of the utility model can introduce two trapped waves in a specific frequency, so that the antenna has the characteristic of in-band double trapped waves, the in-band interference of the antenna in the frequency band is effectively inhibited, the signal quality is improved, the signal coverage range is expanded, and the compatibility is improved.

Description

Technical Field

[0001] The embodiments of the present utility model relate to the technical field of antennas, and in particular to an antenna and a communication device. Background Art

[0002] A planar ultra-wideband antenna is an antenna that can operate within an extremely wide frequency range. The planar ultra-wideband antenna is generally designed as a planar structure, which is convenient for integration into different devices. The planar ultra-wideband antenna has the characteristics of high transmission rate, low cost, light weight, simple structure, and easy integration, and is widely used in wireless communication devices.

[0003] In the process of implementing this application, the inventors found that: currently, the planar ultra-wideband antenna does not have the characteristic of dual-notch in the band, and cannot effectively suppress the interference in the band, which easily leads to a decrease in signal quality, a reduction in signal coverage, and a decrease in compatibility, restricting its use in wireless communication devices. Summary of the Utility Model

[0004] The main technical problem to be solved by the embodiments of the present utility model is to provide an antenna and a communication device that can overcome or at least partially solve the above problems.

[0005] To solve the above technical problem, one technical solution adopted by the embodiments of the present utility model is: to provide an antenna, including a dielectric layer, a radiation layer, a feeding layer, and a radio frequency ground layer; the dielectric layer includes a first surface and a second surface arranged oppositely; the radiation layer is arranged on the first surface, the radiation layer is provided with a first slot and a second slot, and the first slot and the second slot are arranged oppositely; the feeding layer is arranged on the first surface, the feeding layer is provided with a third slot, and the feeding layer is connected to the radiation layer; the radio frequency ground layer is arranged on the second surface, the radio frequency ground layer is provided with a notch, and the radio frequency ground layer is coupled to the radiation layer and the feeding layer respectively.

[0006] In some embodiments, the radiation layer has a first edge, a second edge, and a third edge connected in sequence, the second edge is connected to the feeding layer, the first slot extends obliquely from the first edge, and the first slot forms a first opening at the first edge, the second slot extends obliquely from the third edge, and the second slot forms a second opening at the third edge, and the first slot and the second slot are symmetrically arranged with respect to the feeding layer.

[0007] In some embodiments, the feeding layer has a fourth edge and a fifth edge arranged oppositely, both the fourth edge and the fifth edge are perpendicular to the second edge, the third slot forms a third opening at the fourth edge, the third slot includes a first section and a second section connected in sequence, the first section extends vertically from the fourth edge towards the second edge, and the first section communicates with the third opening, the second section extends vertically from the first section towards the second edge, and the first section and the second section are arranged in an L shape.

[0008] In some embodiments, along a first direction, one side of the feeding layer is aligned with one side of the dielectric layer, the other side of the feeding layer is connected to the radiation layer, and one side of the radiation layer away from the feeding layer is spaced from the opposite side of the dielectric layer; along the first direction, one side of the RF ground layer is aligned with one side of the dielectric layer, the opposite side of the RF ground layer is spaced from the opposite side of the dielectric layer, and the notch is located at the opposite side of the RF ground layer; the first direction is the direction from the feeding layer towards the radiation layer.

[0009] In some embodiments, along a second direction, the feeding layer and the radiation layer are symmetrically arranged with respect to the center line of the first surface; along the second direction, the RF ground layer is symmetrically arranged with respect to the center line of the second surface; the second direction is perpendicular to the first direction.

[0010] In some embodiments, the first slot and the second slot are arranged in a rectangular shape, and the notch is arranged in a rectangular shape.

[0011] In some embodiments, along the second direction, the radiation layer includes a first radiation patch, a second radiation patch, and a third radiation patch connected in sequence, the first radiation patch and the third radiation patch are symmetrically arranged with respect to the second radiation patch, the second radiation patch is symmetrically arranged with respect to the feeding layer, the first edge is located on the first radiation patch, the second edge is located on the second radiation patch, the third edge is located on the third radiation patch, the second direction is perpendicular to the first direction, the first slot extends from the first radiation patch to the second radiation patch, and the second slot extends from the third radiation patch to the second radiation patch.

[0012] In some embodiments, both the first radiation patch and the third radiation patch are arranged in a trapezoidal shape, and the second radiation patch is arranged in a rectangular shape.

[0013] In some embodiments, the antenna has a dual-notch center frequency, and the relationship between the dual-notch center frequency, the first slot, and the third slot is:

[0014]

[0015] Among them, f N is the center frequency of one of the double notches, and f N is the other center frequency of the double notches. C is the propagation speed of light in a vacuum, and ε r is the dielectric constant of the medium. L S is the length of the first slit, and L S is the length of the short side of the L shape of the third slit, and L S is the length of the long side of the L shape of the third slit.

[0016] To solve the above technical problems, another technical solution adopted in the embodiments of the present invention is: to provide a communication device including the above antenna.

[0017] The beneficial effects of the embodiments of the present invention are: Different from the prior art, the embodiments of the present invention provide an antenna, including a dielectric layer, a radiation layer, a feeding layer, and a radio frequency ground layer; the dielectric layer includes a first surface and a second surface arranged opposite to each other; the radiation layer is arranged on the first surface, and the radiation layer is provided with a first slit and a second slit, and the first slit and the second slit are arranged opposite to each other; the feeding layer is arranged on the first surface, the feeding layer is provided with a third slit, and the feeding layer is connected to the radiation layer; the radio frequency ground layer is arranged on the second surface, the radio frequency ground layer is provided with a notch, and the radio frequency ground layer is coupled to the radiation layer and the feeding layer respectively. Through the first slit, the second slit, the third slit, and the notch in the above manner, the embodiments of the present invention can introduce two notches within a specific frequency, making it have the characteristics of double notches in the band, effectively suppressing the in-band interference within this frequency band, improving the signal quality, expanding the signal coverage range, and improving the compatibility. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the specific embodiments of the present invention or the prior art, the following will briefly introduce the drawings required to be used in the description of the specific embodiments or the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts do not necessarily draw according to the actual ratio.

[0019] Figure 1 is the overall structural schematic diagram of the antenna provided by the embodiments of the present invention Figure 1 ;

[0020] Figure 2 is the overall structural schematic diagram of the antenna provided by the embodiments of the present invention Figure 2 ;

[0021] Figure 3 is the overall structural schematic diagram of the antenna provided by the embodiments of the present invention Figure 3 ;

[0022] Figure 4Yes Figure 1 Partial enlarged view at position A in

[0023] Figure 5 Parameter schematic of the simulation example of the antenna provided by the embodiment of the present utility model Figure 1 ;

[0024] Figure 6 Parameter schematic of the simulation example of the antenna provided by the embodiment of the present utility model Figure 2 ;

[0025] Figure 7 Relationship diagram of the standing wave ratio of the simulation example of the antenna provided by the embodiment of the present utility model varying with different L S1 ;

[0026] Figure 8 Relationship diagram of the standing wave ratio of the simulation example of the antenna provided by the embodiment of the present utility model varying with different L S2 ;

[0027] Figure 9 Relationship diagram of the standing wave ratio of the simulation example of the antenna provided by the embodiment of the present utility model varying with different L S3 ;

[0028] Figure 10 Relationship diagram of the standing wave ratio of the simulation example of the antenna provided by the embodiment of the present utility model varying with different L S4 ;

[0029] Figure 11 Relationship diagram of the standing wave ratio of the simulation example of the antenna provided by the embodiment of the present utility model varying with different W S2 ;

[0030] Figure 12 Relationship diagram of the standing wave ratio of the simulation example of the antenna provided by the embodiment of the present utility model varying with different W S3 ;

[0031] Figure 13 Standing wave ratio simulation result diagram of the preferred simulation example of the antenna provided by the embodiment of the present utility model

[0032] Figure 14 Maximum gain and radiation efficiency simulation result diagram of the preferred simulation example of the antenna provided by the embodiment of the present utility model

[0033] Figure 15 Radiation pattern of the preferred simulation example of the antenna provided by the embodiment of the present utility model at 4 GHz

[0034] Figure 16 Radiation pattern of the preferred simulation example of the antenna provided by the embodiment of the present utility model at 9 GHz

[0035] Figure 17 It is the radiation pattern of the preferred simulation example of the antenna provided by the embodiment of the present utility model at 12 GHz.

[0036] Explanation of reference numerals:

[0037] 1 dielectric layer, 11 first surface, 12 second surface;

[0038] 2 radiation layer, 21 first slot, 211 first opening, 22 second slot, 221 second opening, 23 first edge, 24 second edge, 25 third edge, 26 first radiation patch, 27 second radiation patch, 28 third radiation patch;

[0039] 3 feeding layer, 31 third slot, 311 third opening, 312 first section, 313 second section, 32 fourth edge, 33 fifth edge;

[0040] 4 RF ground layer, 41 notch;

[0041] X first direction, Y second direction. Detailed implementation manners

[0042] For the convenience of understanding the present utility model, the present utility model will be described in more detail below with reference to the drawings and specific embodiments. It should be noted that when an element is expressed as "fixed to" another element, it can be directly on the other element, or there can be one or more intermediate elements therebetween. When an element is expressed as "connected to" another element, it can be directly connected to the other element, or there can be one or more intermediate elements therebetween. The terms "upper", "lower", "inner", "outer", "vertical", "horizontal", etc. used in this specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0043] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in this specification in the description of the present utility model are only for the purpose of describing specific embodiments and are not used to limit the present utility model. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0044] A planar ultra-wideband antenna is an antenna that can operate within an extremely wide frequency range. Planar ultra-wideband antennas are generally designed as planar structures, which are convenient for integration into different devices. Planar ultra-wideband antennas have the characteristics of high transmission rate, low cost, light weight, simple structure, and easy integration, and are widely used in wireless communication devices.

[0045] In the process of implementing this application, the inventors found that: currently, planar ultra-wideband antennas do not have the characteristic of dual notches in the band, and cannot effectively suppress in-band interference, which easily leads to a decrease in signal quality, a reduction in signal coverage, and a decrease in compatibility, restricting their use in wireless communication devices.

[0046] In view of this, the present utility model provides an embodiment of an antenna that can have the characteristic of dual notches in the band, effectively suppress in-band interference within this frequency band, improve signal quality, expand signal coverage, and improve compatibility.

[0047] For the above-mentioned antenna, please refer to Figures 1 to 3 , the antenna includes a dielectric layer 1, a radiation layer 2, a feeding layer 3, and a radio frequency ground layer 4; the dielectric layer 1 includes a first surface 11 and a second surface 12 arranged opposite to each other; the radiation layer 2 is disposed on the first surface 11, and the radiation layer 2 is provided with a first slot 21 and a second slot 22, and the first slot 21 and the second slot 22 are arranged opposite to each other; the feeding layer 3 is disposed on the first surface 11, the feeding layer 3 is provided with a third slot 31, and the feeding layer 3 is connected to the radiation layer 2; the radio frequency ground layer 4 is disposed on the second surface 12, the radio frequency ground layer 4 is provided with a notch 41, and the radio frequency ground layer 4 is coupled to the radiation layer 2 and the feeding layer 3 respectively. Through the settings of the above-mentioned first slot 21, second slot 22, third slot 31, and notch 41, two resonances can be formed at specific frequencies of the antenna, and then two notches can be introduced within the specific frequencies of the antenna, so that the antenna has the characteristic of dual notches in the band.

[0048] Specifically, along the first direction X, one side of the feeding layer 3 is aligned with one side of the dielectric layer 1, the other side of the feeding layer 3 is connected to the radiation layer 2, and the side of the radiation layer 2 away from the feeding layer 3 is spaced from the opposite side of the dielectric layer 1; along the first direction X, one side of the RF ground layer 4 is aligned with one side of the dielectric layer 1, the opposite side of the RF ground layer 4 is spaced from the opposite side of the dielectric layer 1, and the notch 41 is located on the opposite side of the RF ground layer 4; the first direction X is the direction from the feeding layer 3 to the radiation layer 2; along the second direction Y, the feeding layer 3 and the radiation layer 2 are symmetrically arranged with respect to the center line of the first surface 11; along the second direction Y, the RF ground layer 4 is symmetrically arranged with respect to the center line of the second surface 12; the second direction Y is perpendicular to the first direction X. Among them, by limiting the position of the notch 41 in the above manner, it can play an auxiliary and optimization role in the dual-notch characteristics of the above antenna. Specifically, by limiting the position of the notch 41, the resonant frequency, current distribution, and impedance matching of the antenna are adjusted, thereby adjusting the center frequency and notch depth of the dual-notch.

[0049] It should be noted that the radiation performance of the above antenna is determined by the size parameters of the radiation layer 2, the bandwidth and reflection coefficient of the above antenna are jointly determined by the size parameters of the RF ground layer 4 and the size parameters of the radiation layer 2, and the center frequency of the in-band notch and the isolation degree at the center frequency of the in-band notch are jointly determined by the size parameters of the first slot 21, the second slot 22, the third slot 31, and the length of the notch 41.

[0050] Please refer to Figures 1 to 3 , the radiation layer 2 has a first edge 23, a second edge 24, and a third edge 25 connected in sequence, the second edge 24 is connected to the feeding layer 3, the first slot 21 extends obliquely from the first edge 23, and the first slot 21 has a first opening 211 at the first edge 23, the second slot 22 extends obliquely from the third edge 25, and the second slot 22 has a second opening 221 at the third edge 25, and the first slot 21 and the second slot 22 are symmetrically arranged with respect to the feeding layer 3.

[0051] Please refer to Figure 4 , the feeding layer 3 has a fourth edge 32 and a fifth edge 33 arranged oppositely, both the fourth edge 32 and the fifth edge 33 are perpendicular to the second edge 24, the third slot 31 has a third opening 311 at the fourth edge 32, the third slot 31 includes a first section 312 and a second section 313 connected in sequence, the first section 312 extends vertically from the fourth edge 32 towards the second edge 24, and the first section 312 communicates with the third opening 311, the second section 313 extends vertically from the first section 312 towards the second edge 24, and the first section 312 and the second section 313 are arranged in an L shape.

[0052] Among them, through the settings of the first slot 21 and the second slot 22, a resonant point is added, thereby providing a notch center frequency. And through the setting of the third slot 31, another resonant point is added, providing another notch center, so that the above antenna can form the characteristic of dual notches. In addition, through the symmetric settings of the first slot 21 and the second slot 22, it helps to introduce resonances at two different frequency points through symmetry and length differences to form the dual-notch characteristic. And the symmetry ensures the uniformity of the resonant distribution and the depth of the notch. At the same time, through the L-shaped setting of the third slot 31, it helps to change the current path and length of the slot through a complex structure, adjust the resonant effects at two different frequency points, and make the dual-notch characteristic more prominent.

[0053] In some embodiments, referring to Figures 1 to 3 , the first slot 21 and the second slot 22 are arranged in a rectangular shape, and the notch 41 is arranged in a rectangular shape. In this way, the rectangular slot can not only provide a stable electromagnetic field distribution, help to form a stable resonant frequency, but also can more effectively suppress in-band interference and enhance the notch depth. In addition, the coupling effect between the rectangular slot and the rectangular notch 41 enhances the resonant effect, promotes the formation of the dual-resonant mode, and helps the formation of the dual-notch characteristic.

[0054] In some embodiments, referring to Figures 1 to 3 , along the first direction X, the first slot 21 has a first inclination angle of 135°, and the second slot 22 has a second inclination angle of 45°. In this way, it helps to form a more prominent dual-notch characteristic.

[0055] In some embodiments, referring to Figures 1 to 3 , along the second direction Y, the radiation layer 2 includes a first radiation patch 26, a second radiation patch 27, and a third radiation patch 28 connected in sequence. The first radiation patch 26 and the third radiation patch 28 are symmetrically arranged with respect to the second radiation patch 27, and the second radiation patch 27 is symmetrically arranged with respect to the feeding layer 3. The first edge 23 is located on the first radiation patch 26, the second edge 24 is located on the second radiation patch 27, and the third edge 25 is located on the third radiation patch 28. The second direction Y is perpendicular to the first direction X. The first slot 21 extends from the first radiation patch 26 to the second radiation patch 27, and the second slot 22 extends from the third radiation patch 28 to the second radiation patch 27. Through the above symmetric radiation patch structure and the coupling between different radiation patches and different slots, it helps the antenna to generate a dual-resonant mode in two different frequency bands, thereby realizing the dual-notch characteristic.

[0056] In some embodiments, referring to Figures 1 to 3, both the first radiation patch 26 and the third radiation patch 28 are trapezoidally arranged, and the second radiation patch is rectangularly arranged. By the above method, the design of different geometric shapes allows the antenna to form independent resonances in two different frequency bands, thereby achieving a dual-notch effect.

[0057] For the above antenna, the antenna has dual-notch center frequencies, and the relationship between the dual-notch center frequencies, the first slot 21 / second slot 22, and the third slot 31 is:

[0058]

[0059] where, f N is one center frequency of the dual-notch, f N is the other center frequency of the dual-notch, C is the propagation speed of light in a vacuum, ε r is the dielectric constant of the medium, L S2 is the length of the first slot 21 / second slot 22, L S3 is the length of the first section 312 of the third slot 31, L S4 is the length of the second section 313 of the third slot 31.

[0060] In order to verify the concept of the antenna in the embodiment of the present invention, the simulation example is as follows:

[0061] Please refer to Figure 5 and Figure 6 , which shows the layout size parameter description of the simulation example, where the dielectric constant of the dielectric layer 1 is 3.38, the dielectric loss is 0.0022, and the thickness is 0.762 mm; the RF ground layer 4 is copper-plated, and the thickness is 0.035 mm. In addition, L P is the length of the dielectric layer 1, W P is the width of the dielectric layer 1 or the RF ground layer 4, L G is the length of the RF ground, H R is the height of the rectangular radiation patch (i.e., the second radiation patch 27), H T is the height of the trapezoidal radiation patch (i.e., the first radiation patch 26 or the second radiation patch 27), L R is the length of the rectangular radiation patch (i.e., the second radiation patch 27) or the long side length of the trapezoidal radiation patch (i.e., the first radiation patch 26 or the second radiation patch 27), L T is the short side length of the trapezoidal radiation patch (i.e., the first radiation patch 26 or the second radiation patch 27), L S1 is the length of the notch 41, W S1 is the width of the notch 41, L S2 is the length of the narrow rectangular slot (i.e., the first slot 21 or the second slot 22), W S2is the width of the narrow rectangular slit (i.e., the first slit 21 or the second slit 22), L S3 is the length of the first section 312 of the third slit 31, L S4 is the length of the second section 313 of the dot slit, W S3 is the width of the first section 312 and the second section 313 of the third slit 31, L F is the length of the microstrip feeder with a characteristic impedance of 50 Ω (i.e., the feeding layer 3), W F is the width of the microstrip feeder with a characteristic impedance of 50 Ω (i.e., the feeding layer 3).

[0062] Please refer to Figures 7 to 12 , which shows the dimensional parameters of the first slit 21, the second slit 22 and the third slit 31, and the length of the notch 41 (L S1 , L S2 , L S3 , L S4 , W S2 , W S3 ) on the center frequencies of the in-band double notches and the isolation degree at the center frequencies of the in-band double notches. In addition, the figure shows that the above antenna has the characteristic of in-band double notches.

[0063] Specifically:[[]]

[0064] First, from Figure 7 it can be seen that as the parameter L S1 increases, in the passband less than the center frequency of the first notch, the standing wave ratio increases; in the frequency range greater than the center frequency of the first notch and less than the center frequency of the second notch, the standing wave ratio increases; in the passband greater than the center frequency of the second notch, the standing wave ratio first decreases and then increases; the passband bandwidth remains unchanged; the center frequencies of the first notch and the second notch are almost unchanged, the standing wave ratio at the center frequency of the first notch increases, and the standing wave ratio at the center frequency of the second notch remains unchanged.

[0065] Second, from Figure 8 it can be seen that as the parameter L S2 increases, in the passband less than the center frequency of the first notch, the standing wave ratio increases; in the frequency range greater than the center frequency of the first notch and less than the center frequency of the second notch, the standing wave ratio decreases; in the passband greater than the center frequency of the second notch, the standing wave ratio first decreases and then increases; the passband bandwidth slightly decreases; the center frequency of the first notch moves down, the center frequency of the second notch remains unchanged, the standing wave ratio at the center frequency of the first notch increases, and the standing wave ratio at the center frequency of the second notch remains unchanged.

[0066] Third, from Figure 9 it can be seen that as the parameter L S3As it increases, within the passband less than the first notch center frequency, the standing wave ratio remains unchanged; within the frequency range greater than the first notch center frequency and less than the second notch center frequency, the standing wave ratio increases; within the passband greater than the second notch center frequency, the standing wave ratio first increases and then remains unchanged; the passband bandwidth remains unchanged; the first notch center frequency remains unchanged, the second notch center frequency moves downward, the standing wave ratio at the first notch center frequency remains unchanged, and the standing wave ratio at the second notch center frequency increases.

[0067] Fourth, from Figure 10 it can be seen that as the parameter L S4 increases, within the passband less than the first notch center frequency, the standing wave ratio remains unchanged; within the frequency range greater than the first notch center frequency and less than the second notch center frequency, the standing wave ratio increases; within the passband greater than the second notch center frequency, the standing wave ratio first decreases and then remains unchanged; the passband bandwidth remains unchanged; the first notch center frequency remains unchanged, the second notch center frequency moves downward, the standing wave ratio at the first notch center frequency remains unchanged, and the standing wave ratio at the second notch center frequency slightly decreases.

[0068] Fifth, from Figure 11 it can be seen that as the parameter W S2 increases, within the passband less than the first notch center frequency, the standing wave ratio increases; within the frequency range greater than the first notch center frequency and less than the second notch center frequency, the standing wave ratio remains unchanged; within the passband greater than the second notch center frequency, the standing wave ratio slightly decreases; the passband bandwidth slightly increases; the first notch center frequency slightly moves downward, the second notch center frequency slightly moves downward, the standing wave ratio at the first notch center frequency increases, and the standing wave ratio at the second notch center frequency remains unchanged.

[0069] Sixth, from Figure 12 it can be seen that as the parameter W S3 increases, within the passband less than the first notch center frequency, the standing wave ratio remains unchanged; within the frequency range greater than the first notch center frequency and less than the second notch center frequency, the standing wave ratio increases; within the passband greater than the second notch center frequency, the standing wave ratio first increases and then remains unchanged; the passband bandwidth remains unchanged; the first notch center frequency remains unchanged, the second notch center frequency remains unchanged, the standing wave ratio at the first notch center frequency remains unchanged, and the standing wave ratio at the second notch center frequency increases.

[0070] In addition, from Figures 7 to 12 it can be seen that the center frequency of the first notch and the isolation degree at the first notch center frequency can be controlled separately, and the center frequency of the second notch and the isolation degree at the second notch center frequency can also be controlled separately.

[0071] According to the above Figures 7 to 12 shown size parameters of the first slot 21, the second slot 22 and the third slot 31 and the length of the notch 41 (L S1 、L S2 、LS3 , L S4 , W S2 , W S3 ) Influence on the center frequency of the in-band double-notch and the isolation at the center frequency of the in-band double-notch. By optimizing the antenna parameters, a preferred simulation example of the antenna can be obtained. The parameters are as follows: L P = 30.0 mm, W P = 30.0 mm, L G = 10 mm, H R = 12.0 mm, H T = 8.0 mm, L R = 19.0 mm, L T = 3.0 mm, L S1 = 0.2 mm, L S2 = 9.0 mm, L S3 = 0.3 mm, L S4 = 5.0 mm, W S1 = 20.0 mm, W S2 = 0.4 mm, W S3 = 0.1 mm, L F = 10.0 mm, W F = 1.8 mm.

[0072] Figure 13 shows the reflection coefficient of the preferred simulation example of the antenna. As can be seen from Figure 12 , the bandwidth range with a standing wave ratio less than 2 is from 3.2 to 13.3 GHz, the center frequency is 8.25 GHz, the absolute bandwidth is 10.1 GHz, and the relative bandwidth is 122.4%, showing ultra-wideband characteristics; within the passband, there are also three transmission poles, located at 3.7 GHz, 8.8 GHz, and 12.0 GHz respectively, ensuring the flatness of the maximum gain and radiation efficiency within the passband; at the notch, there are also two transmission zeros, located at 6.2 GHz and 9.9 GHz respectively, which can effectively suppress the in-band interference at this frequency.

[0073] Figure 14 shows the simulation result diagrams of the maximum gain and radiation efficiency of the preferred simulation example of the antenna. As can be seen from the figure, within the passband, its average maximum gain is 3.89 dBi, showing the advantage of high maximum gain; within the passband, its average radiation efficiency is 94.7%, showing the advantage of high radiation efficiency; there is a notch at 6.2 GHz, and the maximum gain at the center frequency of the notch is only -6.23 dB, and the radiation efficiency is 13.2%; there is a notch at 9.9 GHz, and the maximum gain at the center frequency of the notch is only -7.62 dB, and the radiation efficiency is 28.2%; it can be seen that it has the characteristic of high isolation.

[0074] Figure 15 , Figure 16and Figure 17 shows the radiation patterns of the preferred simulation examples of the antenna at 4 GHz, 9 GHz, and 12 GHz. It can be seen from Figure 15 , Figure 16 and Figure 17 that the preferred simulation example of the antenna is an omnidirectional antenna.

[0075] An embodiment of the present invention provides an antenna, which includes a dielectric layer 1, a radiation layer 2, a feeding layer 3, and a radio frequency ground layer 4; the dielectric layer 1 includes a first surface 11 and a second surface 12 arranged oppositely; the radiation layer 2 is arranged on the first surface 11, and the radiation layer 2 is provided with a first slot 21 and a second slot 22, and the first slot 21 and the second slot 22 are arranged oppositely; the feeding layer 3 is arranged on the first surface 11, the feeding layer 3 is provided with a third slot 31, and the feeding layer 3 is connected to the radiation layer 2; the radio frequency ground layer 4 is arranged on the second surface 12, the radio frequency ground layer 4 is provided with a notch 41, and the radio frequency ground layer 4 is coupled to the radiation layer 2 and the feeding layer 3 respectively. Through the first slot 21, the second slot 22, the third slot 31, and the notch 41 in the above manner, the embodiment of the present invention can introduce two notches within a specific frequency range, making it have the characteristics of dual in-band notches, effectively suppressing the in-band interference within this frequency band, improving the signal quality, expanding the signal coverage range, and improving the compatibility.

[0076] The present invention further provides an embodiment of a communication device. The communication device includes the above antenna. For the specific structure and function of the above antenna, reference can be made to the above embodiment, and details are not described herein one by one.

[0077] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. An antenna, characterized in that, Comprising: A dielectric layer including a first surface and a second surface disposed opposite to each other; A radiation layer disposed on the first surface, the radiation layer being provided with a first slot and a second slot, the first slot and the second slot being disposed opposite to each other; A feeding layer disposed on the first surface, the feeding layer being provided with a third slot, the feeding layer being connected to the radiation layer; A radio frequency ground layer disposed on the second surface, the radio frequency ground layer being provided with a notch, the radio frequency ground layer being coupled to the radiation layer and the feeding layer respectively.

2. The antenna according to claim 1, wherein: The radiation layer has a first edge, a second edge and a third edge connected in sequence, the second edge is connected to the feeding layer, the first slot extends obliquely from the first edge, and the first slot forms a first opening at the first edge, the second slot extends obliquely from the third edge, and the second slot forms a second opening at the third edge, the first slot and the second slot are symmetrically disposed with respect to the feeding layer.

3. The antenna according to claim 2, wherein: The feeding layer has a fourth edge and a fifth edge disposed opposite to each other, both the fourth edge and the fifth edge are perpendicular to the second edge, the third slot forms a third opening at the fourth edge, the third slot includes a first section and a second section connected in sequence, the first section extends perpendicularly from the fourth edge towards the fifth edge, and the first section communicates with the third opening, the second section extends perpendicularly from the first section towards the second edge, the first section and the second section are disposed in an L shape.

4. The antenna according to claim 3, wherein: Along a first direction, one side of the feeding layer is aligned with one side of the dielectric layer, the other side of the feeding layer is connected to the radiation layer, and the side of the radiation layer away from the feeding layer is spaced from the opposite side of the dielectric layer; Along the first direction, one side of the radio frequency ground layer is aligned with one side of the dielectric layer, the opposite side of the radio frequency ground layer is spaced from the opposite side of the dielectric layer, and the notch is located on the opposite side of the radio frequency ground layer; The first direction is the direction from the feeding layer towards the radiation layer.

5. The antenna according to claim 4, wherein: Along a second direction, the feeding layer and the radiation layer are symmetrically disposed with respect to the center line of the first surface; Along the second direction, the radio frequency ground layer is symmetrically disposed with respect to the center line of the second surface; The second direction is perpendicular to the first direction.

6. The antenna according to claim 4, wherein: The first slot and the second slot are rectangularly shaped, and the notch is rectangularly shaped.

7. The antenna according to claim 5, wherein: Along the second direction, the radiation layer includes a first radiation patch, a second radiation patch, and a third radiation patch that are sequentially connected. The first radiation patch and the third radiation patch are symmetrically arranged with respect to the second radiation patch. The second radiation patch is symmetrically arranged with respect to the feeding layer. The first edge is located on the first radiation patch, the second edge is located on the second radiation patch, and the third edge is located on the third radiation patch. The second direction is perpendicular to the first direction. The first slot extends from the first radiation patch to the second radiation patch, and the second slot extends from the third radiation patch to the second radiation patch.

8. The antenna according to claim 7, wherein both the first radiation patch and the third radiation patch are trapezoidally arranged, and the second radiation patch is rectangularly arranged.

9. The antenna according to claim 8, wherein the antenna has dual notch center frequencies, and the relationship between the dual notch center frequencies, the first slot, and the third slot is: where, f N1 is the center frequency of one of the double notches, f N2 is the center frequency of the other double notch, C is the speed of light in vacuum, ε r is the permittivity of the medium, L S2 is the length of the first slit, L S3 is the length of the L-shaped short side of the third slit, L S4 is the length of the L-shaped long side of the third slit.

10. A communication device, characterized in that, including the antenna according to any one of claims 1-9.

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