Antenna and communication equipment

Abstract

The embodiment of the utility model relates to the technical field of antennas, in particular to an antenna and communication equipment, which comprises a radiation layer provided with a radiation body, a microstrip feeder line, a first slot, a first microstrip line and a second microstrip line, the radiation body is connected with the microstrip feeder line, the first slot is partially positioned in the radiation body, and the other part of the first slot is positioned in the microstrip feeder line. The first micro-strip line and the second micro-strip line are symmetrically arranged relative to the center line of the micro-strip feeder line in the length direction; a radio frequency formation; the dielectric layer comprises a first surface and a second surface which are oppositely arranged, the radiation layer is arranged on the first surface, and the radio frequency ground layer is arranged on the second surface; the first via hole penetrates through the first microstrip line, the dielectric layer and the radio frequency ground layer; and the second via hole penetrates through the second microstrip line, the dielectric layer and the radio frequency ground layer. Through the above mode, the antenna provided by the embodiment of the utility model can have in-band single trapped waves, thereby forming effective suppression on in-band interference.

Description

Technical Field

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

[0002] A planar broadband antenna is an antenna with broadband characteristics, and its structure is in a planar form. It can maintain stable performance within a relatively wide frequency range, and because of its advantages such as high transmission rate, low cost, light weight, simple design, low profile, high data transmission rate, and easy integration with other components, it has received extensive attention and in-depth research from practitioners and scholars in this field and is applied in fields such as radar systems and detection imaging.

[0003] During the implementation of the present utility model, the inventors found that currently, the existing planar broadband antennas do not have in-band single-notch filtering, and cannot effectively suppress in-band interference, which greatly limits the use of planar broadband antennas in modern wireless communication terminals. 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 an electronic device that can have in-band single-notch filtering and effectively suppress in-band interference.

[0005] To solve the above technical problem, a technical solution adopted by the present utility model is: to provide an antenna, including a radiation layer provided with a radiator, a microstrip feeder, a first slot, a first microstrip line, and a second microstrip line. The radiator is connected to the microstrip feeder. Part of the first slot is located in the radiator, and the other part of the first slot is located in the microstrip feeder. The first microstrip line and the second microstrip line are symmetrically arranged about the center line in the length direction of the microstrip feeder; a radio frequency ground plane; a dielectric layer including a first surface and a second surface arranged opposite to each other. The radiation layer is disposed on the first surface, and the radio frequency ground plane is disposed on the second surface; a first via hole penetrating through the first microstrip line, the dielectric layer, and the radio frequency ground plane; a second via hole penetrating through the second microstrip line, the dielectric layer, and the radio frequency ground plane.

[0006] Optionally, one end of the first microstrip line is short-circuited through the first via hole, and the other end of the first microstrip line is open.

[0007] Optionally, one end of the second microstrip line is short-circuited through the second via hole, and the other end of the second microstrip line is open.

[0008] Optionally, the shape of the first microstrip line is L-shaped, and / or the shape of the second microstrip line is L-shaped.

[0009] Optionally, the first microstrip line includes a first vertical line and a first horizontal line. One end of the first vertical line is connected to the first via, and the other end of the first vertical line is connected to the first horizontal line. The first vertical line is perpendicular to the center line of the length direction of the microstrip feeder, and the first horizontal line is parallel to the center line of the length direction of the microstrip feeder.

[0010] Optionally, the second microstrip line includes a second vertical line and a second horizontal line. One end of the second vertical line is connected to the second via, and the other end of the second vertical line is connected to the second horizontal line. The second vertical line is perpendicular to the center line of the length direction of the microstrip feeder, and the second horizontal line is parallel to the center line of the length direction of the microstrip feeder.

[0011] Optionally, the projections of the first microstrip line and the second microstrip line on the RF ground plane are completely located within the RF ground plane.

[0012] Optionally, the first slot includes a first vertical slot and a first horizontal slot that are connected and communicate with each other. The first horizontal slot communicates with the middle part of the first vertical slot, and the first horizontal slot is perpendicular to the first vertical slot. The first horizontal slot is parallel to the horizontal line in the length direction of the microstrip feeder, and the first vertical slot is perpendicular to the horizontal line in the length direction of the microstrip feeder; wherein, a part of the first horizontal slot is located on the microstrip feeder, and another part of the first horizontal slot is located on the radiator, and the first vertical slot is completely located on the radiator.

[0013] Optionally, the projection of the radiator on the dielectric layer is an octagon.

[0014] Optionally, along the length direction of the microstrip feeder, the perpendicular bisector of the radiator, the perpendicular bisector of the microstrip feeder, the perpendicular bisector of the RF ground plane, and the perpendicular bisector of the first slot all coincide with the perpendicular bisector of the dielectric layer.

[0015] Optionally, the characteristic impedance of the microstrip feeder is 50 ohms.

[0016] To solve the above technical problems, another technical solution adopted by the present utility model is: to provide a communication device, including a housing and the above antenna, and the antenna is disposed on the housing.

[0017] The beneficial effects of the embodiments of the present utility model are as follows: Different from the prior art, the embodiments of the present utility model provide an antenna, which includes a radiation layer, a radio frequency ground layer, a dielectric layer, a first via hole and a second via hole. The radiation layer, the dielectric layer and the radio frequency ground layer are stacked in sequence. The radiation layer is provided with a radiator, a microstrip feeder, a first slot, a first microstrip line and a second microstrip line. The radiator is connected to the microstrip feeder. A part of the first slot is located in the radiator, and the other part of the first slot is located in the microstrip feeder. The first microstrip line and the second microstrip line are symmetrically arranged with respect to the center line in the length direction of the microstrip feeder. The dielectric layer includes a first surface and a second surface which are oppositely arranged. The radiation layer is arranged on the first surface, and the radio frequency ground layer is arranged on the second surface. The first via hole penetrates through the first microstrip line, the dielectric layer and the radio frequency ground layer. The second via hole penetrates through the second microstrip line, the dielectric layer and the radio frequency ground layer. Through the above structure, the present utility model can enable the antenna to have in-band single notch, thereby effectively suppressing the in-band interference of the antenna. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required to be used in the embodiments of the present application. Obviously, the following described drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the drawings.

[0019] Figure 1 is an exploded structural schematic diagram of the antenna provided by the embodiments of the present utility model;

[0020] Figure 2 is an assembled structural schematic diagram of the antenna provided by the embodiments of the present utility model;

[0021] Figure 3 is a schematic diagram of the antenna provided by the embodiments of the present utility model from a top view perspective;

[0022] Figure 4 is Figure 3 an enlarged view of part A in

[0023] Figure 5 is a schematic diagram of the broadband antenna provided by the embodiments of the present utility model from a side view perspective;

[0024] Figure 6 is a schematic diagram of the broadband antenna provided by the embodiments of the present utility model from a top view perspective;

[0025] Figure 7 is a schematic diagram of the broadband antenna provided by the embodiments of the present utility model from a bottom view perspective;

[0026] Figure 8It is a schematic diagram of the broadband antenna provided by the embodiment of the present utility model from a top-down perspective;

[0027] Figure 9 It is a schematic diagram of the broadband antenna provided by the embodiment of the present utility model from a bottom-up perspective;

[0028] Figure 10 It is a schematic diagram of the simulation result of the reflection coefficient of the broadband antenna provided by the embodiment of the present utility model under the optimal parameters;

[0029] Figure 11 It is a schematic diagram of the simulation results of the maximum gain and radiation efficiency of the broadband antenna provided by the embodiment of the present utility model under the optimal parameters;

[0030] Figure 12 It is the radiation pattern of the broadband antenna provided by the embodiment of the present utility model at 11.0 GHz;

[0031] Figure 13 It is the radiation pattern of the broadband antenna provided by the embodiment of the present utility model at 22.0 GHz;

[0032] Figure 14 It is the radiation pattern of the broadband antenna provided by the embodiment of the present utility model at 33.0 GHz Detailed implementation manners

[0033] For the convenience of understanding the present utility model, the present utility model will be described in more detail below with reference to the accompanying 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 "vertical", "horizontal", "left", "right" and similar expressions used in this specification are only for the purpose of illustration.

[0034] 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.

[0035] Please refer to Figures 1 - 4, the antenna 1000 includes a radiation layer 1, a dielectric layer 2, a radio frequency ground layer 3, a first via 4, and a second via 5. Among them, the radiation layer 1, the dielectric layer 2, and the radio frequency ground layer 3 are stacked in sequence. The first via 4 sequentially penetrates the radiation layer 1, the dielectric layer 2, and the radio frequency ground layer 3, and the second via 5 sequentially penetrates the radiation layer 1, the dielectric layer 2, and the radio frequency ground layer 3. The radiation layer 1 is responsible for radiating and receiving electromagnetic waves in the antenna 1000. Specifically, the radiation layer 1 has two working modes depending on its unique structure, namely the radiation mode and the receiving mode. In the radiation mode, the radiation layer 1 can convert the received electrical energy into electromagnetic wave energy and radiate the electromagnetic waves into the surrounding space, so as to ensure that the antenna 1000 realizes the function of information transmission; in the receiving mode, the radiation layer 1 is responsible for capturing electromagnetic waves from space, converting them into electrical signals, and then transmitting them to the connected circuit for processing. It can be understood that the structure of the radiation layer 1 and the arrangement of each component in the radiation layer 1 determine the radiation pattern of the antenna 1000, that is, the ability of the antenna 1000 to radiate or receive electromagnetic waves in different directions. The dielectric layer 2 is used to isolate the radiation layer 1 and the radio frequency ground layer 3 of the antenna 1000, avoiding short circuits caused by direct contact between the radiation layer 1 and the radio frequency ground layer 3, effectively ensuring the normal operation of the antenna 1000, enhancing radiation and impedance matching; the dielectric layer 2, as a structure supporting the radiation layer 1 and the radio frequency ground layer 3, ensures that the radiation layer 1 can maintain its shape and position, so as to stably radiate and receive electromagnetic waves, and further ensures the overall structural strength of the antenna 1000, making the working stability and reliability of the antenna 1000 guaranteed. The radio frequency ground layer 3 is also called a ground conductor layer or a ground plane in some other embodiments. The radio frequency ground layer 3 is used to provide a reference potential and provide a stable working environment for the antenna 1000; it is used to reflect electromagnetic waves from below the radiation layer 1, reduce the radiation loss of the radiation layer 1 downward, enhance the radiation ability of the antenna 1000, and reduce radiation interference. The first via 4 and the second via 5 are used to realize the electrical connection between the radiation layer 1 and the radio frequency ground layer 3, ensuring the complete transmission of radio frequency signals. Further, the existence of the first via 4 and the second via 5 realizes the vertical transmission of signals.

[0036] It can be understood that the radiation layer 1, the dielectric layer 2, and the radio frequency ground layer 3 together constitute a microstrip structure. The structural layout of the radiation layer 1 affects the radiation efficiency and polarization purity of the antenna 1000, and different structural layouts have different effects on the antenna 1000; the size and shape of the radiation layer 1 determine the frequency response, radiation pattern, gain, etc. of the antenna 1000. The dielectric constant of the dielectric layer 2 affects the impedance matching, bandwidth, and radiation efficiency of the antenna 1000; the thickness affects the working frequency, impedance bandwidth, and radiation performance of the antenna 1000.

[0037] For the above-mentioned radiation layer 1, please refer to Figures 1 - 4, the radiation layer 1 is provided with a radiator 11, a microstrip feeder 12, a first slot 13, a first microstrip line 14 and a second microstrip line 15. The radiator 11 is connected to the microstrip feeder 12. A part of the first slot 13 is located on the radiator 11, and another part of the first slot 13 is located on the microstrip feeder 12. The first microstrip line 14 and the second microstrip line 15 are symmetrically arranged about the center line in the length direction of the microstrip feeder 12. Moreover, the center line of the radiator 11 coincides with the center line of the microstrip feeder 12 to ensure that the radiation layer 1 as a whole presents a symmetric structure.

[0038] To facilitate the understanding and description of the length direction of the microstrip feeder 12, in this embodiment, the length direction of the microstrip feeder 12 is specified as the X direction.

[0039] It can be understood that the radiator 11, as a component for receiving and / or transmitting electromagnetic waves, can efficiently radiate or receive electromagnetic waves within a specific frequency range through its specific shape, size, and material properties. The design of the radiator 11 has a decisive impact on the radiation characteristics of the antenna 1000, including characteristics such as radiation pattern, gain, polarization mode, bandwidth, etc. By adjusting the shape, size, material of the radiator 11, and its relative position with other components (such as the microstrip feeder 12, the first slot 13, etc.), the radiation performance of the antenna 1000 can be optimized to meet specific application requirements. In this embodiment, preferably, the projection of the radiator 11 on the dielectric layer 2 is an octagon, and the octagonal radiator 11 is a symmetric shape to optimize the radiation path of the antenna 1000, reduce the loss of energy during transmission, and improve the radiation efficiency of the antenna 1000. Further, to simplify the processing method of the octagonal radiator 11, the octagonal radiator 11 can be obtained by subtracting four right triangles with exactly the same size from the four corner positions of a rectangular radiation patch. It can be understood that the right triangle is at the four corners of the rectangular radiation patch.

[0040] It should be noted that the first slot 13 provided on the radiator 11 affects the radiation characteristics of the radiator 11. By changing the size, shape, and position of the first slot 13, key parameters such as the radiation pattern, gain, and bandwidth of the radiator 11 can be finely controlled. Moreover, the presence of the first slot 13 changes the current distribution on the surface of the radiator 11, affecting the radiation mode and intensity of the radiation wave.

[0041] In some embodiments, the shape of the first slot 13 is T-shaped. Specifically, the first slot 13 includes a first vertical slot 131 and a first horizontal slot 132 that are connected and communicate with each other. The first horizontal slot 132 communicates with the middle part of the first vertical slot 131, and the first horizontal slot 132 is perpendicular to the first vertical slot 131. The first horizontal slot 132 is parallel to the horizontal line in the length direction of the microstrip feeder 12, and the first vertical slot 131 is perpendicular to the horizontal line in the length direction of the microstrip feeder 12. Among them, a part of the first horizontal slot 132 is located in the microstrip feeder 12, and the other part of the first horizontal slot 132 is located in the radiator 11. The first vertical slot 131 is completely located in the radiator 11 to improve the radiation ability of the antenna 1000 and increase the gain of the antenna 1000.

[0042] As a key channel for signal transmission in the antenna 1000, the characteristic impedance of the microstrip feeder 12 is a crucial parameter. It directly affects the signal transmission efficiency, power distribution, and the overall performance of the antenna 1000. The characteristic impedance is a physical quantity that describes the relationship between voltage and current on a transmission line. It determines the impedance matching situation encountered by the signal of the antenna 1000 during transmission. In this embodiment, preferably, the characteristic impedance of the microstrip feeder 12 is 50 ohms.

[0043] In some embodiments, the projection of the microstrip feeder 12 on the RF ground layer 3 is at least partially located on the RF ground layer 3.

[0044] Both the first microstrip line 14 and the second microstrip line 15 are electromagnetically coupled to the microstrip feeder 12 to transmit the signal source received by the microstrip feeder 12. In some embodiments, one end of the first microstrip line 14 is short-circuited through the first via 4, that is, the first via 4 penetrates the first microstrip line 14, the dielectric layer 2, and the RF ground layer 3, and the other end of the first microstrip line 14 is open; and / or, one end of the second microstrip line 15 is short-circuited through the second via 5, that is, the second via 5 penetrates the second microstrip line 15, the dielectric layer 2, and the RF ground layer 3, and the other end of the second microstrip line 15 is open.

[0045] In some embodiments, the shape of the first microstrip line 14 is L-shaped, and / or the shape of the second microstrip line 15 is L-shaped.

[0046] In some embodiments, please refer to Figure 4, the first microstrip line 14 includes a first vertical line 141 and a first horizontal line 142. One end of the first vertical line 141 is connected to the first via 4, and the other end of the first vertical line 141 is connected to the first horizontal line 142. The first vertical line 141 is perpendicular to the center line in the length direction of the microstrip feeder 12, and the first horizontal line 142 is parallel to the center line in the length direction of the microstrip feeder 12; and / or, the second microstrip line 15 includes a second vertical line 151 and a second horizontal line 152. One end of the second vertical line 151 is connected to the second via 5, and the other end of the second vertical line 151 is connected to the second horizontal line 152. The second vertical line 151 is perpendicular to the center line in the length direction of the microstrip feeder 12, and the second horizontal line 152 is parallel to the center line in the length direction of the microstrip feeder 12.

[0047] It should be noted that the projections of the first microstrip line 14 and the second microstrip line 15 on the RF ground layer 3 are completely located within the RF ground layer 3, enhancing the coupling between the first microstrip line 14 and the RF ground layer 3 and between the second microstrip line 15 and the RF ground layer 3, thereby reducing electromagnetic interference to the surrounding environment. Moreover, the positional relationship between the first microstrip line 14 and the second microstrip line 15 and the RF ground layer 3 makes the overall structure of the antenna 1000 more compact and improves the integration degree of the antenna 1000.

[0048] For the above-mentioned dielectric layer 2, please refer to Figure 1 , the dielectric layer 2 includes a first surface 21 and a second surface 22 which are oppositely arranged. The radiation layer 1 is disposed on the first surface 21, and the RF ground layer 3 is disposed on the second surface 22.

[0049] In some embodiments, the center line of the microstrip feeder 12 in the length direction, the center line of the radiator 11 in the length direction coincide with the center line of the dielectric layer 2 to ensure that the radiation layer 1 is located at the central position of the dielectric layer 2. Moreover, the microstrip feeder 12 includes a first alignment edge (not labeled) perpendicular to the X direction, and the dielectric layer 2 includes a second alignment edge (not labeled) perpendicular to the X direction. The first alignment edge and the second alignment edge are flush in the stacked state.

[0050] For the above-mentioned RF ground layer 3, please refer to Figure 1 , the shape of the RF ground layer 3 is rectangular. The projection of the RF ground layer 3 on the dielectric layer 2 coincides with a partial area of the dielectric layer 2, and some side edges of the RF ground layer 3 completely coincide with some side edges of the dielectric layer 2.

[0051] Along the direction parallel to the X direction, the perpendicular bisectors of the radiator 11, the microstrip feeder 12, the RF ground layer 3, and the first slot 13 all coincide with the perpendicular bisector of the dielectric layer 2 to ensure the overall symmetric structure of the antenna 1000.

[0052] It should be noted that the radiation performance of the antenna 1000 is determined by the size parameters of the radiator 11, the bandwidth and reflection coefficient of the antenna 1000 are jointly determined by the size parameters of the RF ground layer 3 and the size parameters of the radiator 11, and the notch center frequency and the isolation at the notch center frequency are jointly determined by the size parameters and positions of the first microstrip line 14 in an L shape with one end open and the other end short-circuited and the second microstrip line 15 in an L shape.

[0053] In this embodiment, the antenna 1000 includes a radiation layer 1, a dielectric layer 2, an RF ground layer 3, a first via 4 and a second via 5. The radiation layer 1, the dielectric layer 2 and the RF ground layer 3 are stacked in sequence. The first via 4 sequentially penetrates through the radiation layer 1, the dielectric layer 2 and the RF ground layer 3. The second via 5 sequentially penetrates through the radiation layer 1, the dielectric layer 2 and the RF ground layer 3. The radiation layer 1 is provided with a radiator 11, a microstrip feeder 12, a first slot 13, a first microstrip line 14 and a second microstrip line 15. The radiator 11 is connected to the microstrip feeder 12. A part of the first slot 13 is located in the radiator 11, and another part of the first slot 13 is located in the microstrip feeder 12. The first microstrip line 14 and the second microstrip line 15 are symmetrically arranged about the center line in the length direction of the microstrip feeder 12. Among them, the first via 4 penetrates through the first microstrip line 14, the dielectric layer 2 and the RF ground layer 3, and the second via 5 penetrates through the second microstrip line 15, the dielectric layer 2 and the RF ground layer 3. The dielectric layer 2 includes a first surface 21 and a second surface 22 arranged oppositely. The radiation layer 1 is arranged on the first surface 21, and the RF ground layer 3 is arranged on the second surface 22. Through the above structure, the embodiment of the present invention can enable the antenna 1000 to have in-band notch, so as to effectively suppress the in-band interference of the antenna 1000.

[0054] To facilitate readers to better understand the concept of the present invention, the following embodiment of the broadband antenna 2000 based on the above structure is provided and a simulation experiment is carried out. Please refer to Figures 5 - 9 , it is specified that the relative permittivity of the dielectric layer 2 is 3.38, the dielectric loss is 0.0022, and the thickness is 0.2 mm; both the radiation layer 1 and the RF ground layer 3 are made of copper plating material and the thickness is 0.035 mm.

[0055] Please refer to Figure 8 and Figure 9 , it is specified that L A is the length of the dielectric layer 2, W A is the width of the dielectric layer 2 or the width of the RF ground layer 3, L G is the length of the RF ground layer 3, L P is the length of the rectangular radiation patch that constitutes the octagonal radiator 11, W P is the width of the rectangular radiation patch that constitutes the octagonal radiator 11, L T is the length of the triangular patch subtracted from the rectangular radiation patch that constitutes the octagonal radiator 11, W TThe width of the triangular patch subtracted from the rectangular radiation patch that constitutes the octagonal radiator 11, L S The shortest distance from one side of the first vertical slit 131 of the first slit 13 that constitutes the T shape to the first horizontal slit 132, W S The width of the first vertical slit 131 or the first horizontal slit 132 of the first slit 13 that constitutes the T shape, S S The distance between the first vertical slit 131 of the first slit 13 that constitutes the T shape and the microstrip feeder 12, L MV The length of the first horizontal line 142 that constitutes the first microstrip line 14 or the length of the second horizontal line 152 that constitutes the second microstrip line 15, L MH The length of the first vertical line 141 that constitutes the first microstrip line 14 or the length of the second vertical line 151 that constitutes the second microstrip line 15, S M The distance between the first horizontal line 142 that constitutes the first microstrip line 14 and the microstrip feeder 12, W M The width of the first microstrip line 14 or the width of the second microstrip line 15, L F The length of the 50-ohm microstrip feeder 12, W F The width of the 50-ohm microstrip feeder 12.

[0056] Corresponding to the above structure and optimizing the above design parameters, a design example can be obtained as follows: L A = 11.5 mm, W A = 11.0 mm, L G = 3.75 mm, L P = 9.0 mm, W P = 7.0 mm, L T = 2.3 mm, W T = 2.0 mm, L S = 2.2 mm, W S = 0.1 mm, S S = 1.2 mm, L MV = 2.6 mm, L MH = 0.4 mm, S M = 0.1 mm, L F = 4.0 mm, W F A broadband antenna 2000 with W = 0.4 mm.

[0057] For the broadband antenna 2000 after parameter optimization, its reflection coefficient is as Figure 10 shown. From Figure 10It is easy to know that the bandwidth range with a reflection coefficient less than -10 dB is from 9.25 GHz to 34.99 GHz, the center frequency is 22.12 GHz, the absolute bandwidth is 25.74 GHz, and the relative bandwidth is 116.4%, showing broadband characteristics; within the passband, there are also four transmission poles, located at 12.51 GHz, 17.49 GHz, 24.58 GHz, and 32.76 GHz respectively, ensuring the flatness of the maximum gain and radiation efficiency within the passband; there is also a notch within the passband, located at 15.72 GHz, which can effectively suppress the in-band notch.

[0058] The simulation result diagrams of the maximum gain and radiation efficiency of the broadband antenna 2000 are as Figure 11 shown. It can be Figure 11 seen that within the passband, its average maximum gain is 4.44 dBi, showing the advantage of high maximum gain; within the passband, its average radiation efficiency is 94.4%, showing the advantage of high radiation efficiency; at the center frequency of the notch, its maximum gain is only -9.68 dBi, and the radiation efficiency is 23.34%. Comparing with the average maximum gain and average radiation efficiency within the passband, it can be known that it has high isolation characteristics at the center frequency of the notch.

[0059] The radiation patterns of the broadband antenna 2000 at 11.0 GHz, 22.0 GHz, and 33.0 GHz are as Figure 12 , Figure 13 and Figure 14 shown. It can be Figure 12 , Figure 13 and Figure 14 seen that the antenna 1000 is an omnidirectional broadband antenna 2000.

[0060] The present utility model also provides an embodiment of a communication device. The communication device includes a housing and the above-mentioned antenna 1000. For the structure and function of the antenna 1000, please refer to the above-mentioned embodiment, which will not be elaborated here one by one. The antenna 1000 is disposed in the housing.

[0061] In some embodiments, the communication device includes a fixing plate. The fixing plate is provided with a locking frame, and the antenna is detachably fixed to the fixing plate through the locking frame. The fixing plate is fixed to the housing. Among them, the fixing method of the fixing plate to the housing includes but is not limited to: snap connection, screw connection, welding, etc. In this embodiment, the fixing plate is welded to the housing.

[0062] It should be noted that the description and drawings of the present utility model provide preferred embodiments of the present utility model. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described in this specification. These embodiments do not serve as additional limitations to the content of the present utility model. The purpose of providing these embodiments is to make the understanding of the disclosed content of the present utility model more thorough and comprehensive. Moreover, the above technical features continue to be combined with each other to form various embodiments not listed above, all of which are regarded as within the scope described in the description of the present utility model. Further, for those of ordinary skill in the art, improvements or transformations can be made according to the above description, and all such improvements and transformations should fall within the protection scope of the appended claims of the present utility model.

Claims

1. An antenna, characterized in that, Comprising: A radiation layer provided with a radiator, a microstrip feeder, a first slot, a first microstrip line, and a second microstrip line. The radiator is connected to the microstrip feeder. A part of the first slot is located on the radiator, and another part of the first slot is located on the microstrip feeder. The first microstrip line and the second microstrip line are symmetrically arranged with respect to the center line in the length direction of the microstrip feeder; A radio frequency ground plane; A dielectric layer including a first surface and a second surface arranged opposite to each other. The radiation layer is disposed on the first surface, and the radio frequency ground plane is disposed on the second surface; A first via hole penetrating the first microstrip line, the dielectric layer, and the radio frequency ground plane; A second via hole penetrating the second microstrip line, the dielectric layer, and the radio frequency ground plane.

2. The antenna according to claim 1, wherein One end of the first microstrip line is short-circuited through the first via hole, and the other end of the first microstrip line is open; and / or, One end of the second microstrip line is short-circuited through the second via hole, and the other end of the second microstrip line is open.

3. The antenna according to claim 2, wherein The shape of the first microstrip line is L-shaped, and / or, the shape of the second microstrip line is L-shaped.

4. The antenna according to claim 3, wherein The first microstrip line includes a first vertical line and a first horizontal line. One end of the first vertical line is connected to the first via hole, and the other end of the first vertical line is connected to the first horizontal line. The first vertical line is perpendicular to the center line in the length direction of the microstrip feeder, and the first horizontal line is parallel to the center line in the length direction of the microstrip feeder; and / or, The second microstrip line includes a second vertical line and a second horizontal line. One end of the second vertical line is connected to the second via hole, and the other end of the second vertical line is connected to the second horizontal line. The second vertical line is perpendicular to the center line in the length direction of the microstrip feeder, and the second horizontal line is parallel to the center line in the length direction of the microstrip feeder.

5. The antenna according to any one of claims 1-4, wherein The projections of the first microstrip line and the second microstrip line on the radio frequency ground plane are completely located on the radio frequency ground plane.

6. The antenna according to claim 1, wherein The first slot includes a first vertical slot and a first horizontal slot that are connected and communicate with each other. The first horizontal slot communicates with the middle part of the first vertical slot, and the first horizontal slot is perpendicular to the first vertical slot. The first horizontal slot is parallel to the horizontal line in the length direction of the microstrip feeder, and the first vertical slot is perpendicular to the horizontal line in the length direction of the microstrip feeder; Wherein, a part of the first horizontal slot is located on the microstrip feeder, and another part of the first horizontal slot is located on the radiator. The first vertical slot is completely located on the radiator.

7. The antenna according to claim 1, wherein The projection of the radiator on the dielectric layer is an octagon.

8. The antenna according to claim 1, wherein Along the length direction of the microstrip feeder, the perpendicular bisectors of the radiator, the microstrip feeder, the RF ground plane, and the first slot all coincide with the perpendicular bisector of the dielectric layer.

9. The antenna according to claim 1, wherein the characteristic impedance of the microstrip feeder is 50 ohms.

10. A communication device, characterized in that, Comprising a housing and an antenna according to any one of claims 1-9, the antenna being disposed in the housing.

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