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 and an open-circuit branch knot, the microstrip feeder line is connected with the radiation body, and the open-circuit branch knot is connected with the microstrip feeder line; the microstrip feeder line is provided with a first gap; the radiator is provided with two second gaps, and the two second gaps are symmetrical about the center line of the microstrip 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. Through the above mode, the antenna provided by the embodiment of the utility model can have in-band double 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, which can maintain stable performance within a relatively wide frequency range. Due to 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 to fields such as radar systems and detection imaging.

[0003] In the process of implementing the present utility model, the inventors of the present utility model found that: currently, the existing planar broadband antennas do not have in-band dual notches 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 a communication device that can have in-band notches 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, and an open stub, the microstrip feeder is connected to the radiator, and the open stub is connected to the microstrip feeder; the microstrip feeder is provided with a first slot; the radiator is provided with two second slots, and the two second slots are symmetric about the center line in the length direction of the microstrip feeder; a radio frequency ground layer; a dielectric layer, including a first surface and a second surface arranged opposite to each other, the radiation layer is arranged on the first surface, and the radio frequency ground layer is arranged on the second surface.

[0006] Optionally, the included angle between one of the second slots and the center line in the length direction of the microstrip feeder is 45°.

[0007] Optionally, the included angle between the other second slot and the center line in the length direction of the microstrip feeder is 315°.

[0008] Optionally, the shape of the first slot is L-shaped.

[0009] Optionally, the microstrip feeder is provided with a first side line; the first slot includes a first vertical slot and a first horizontal slot. One end of the first vertical slot communicates with the first side line, the other end of the first vertical slot is connected to the first horizontal slot, the first vertical slot is perpendicular to the center line in the length direction of the microstrip feeder, and the first horizontal slot is parallel to the center line in the length direction of the microstrip feeder.

[0010] Optionally, the shape of the open stub is L-shaped.

[0011] Optionally, the microstrip feeder is provided with a second side line; the open stub includes a first vertical stub and a first horizontal stub. One end of the first vertical stub is connected to the second side line, the other end of the first vertical stub is connected to the first horizontal stub, the first vertical stub is perpendicular to the center line in the length direction of the microstrip feeder, and the first horizontal stub is parallel to the center line in the length direction of the microstrip feeder.

[0012] Optionally, the projection of the radiator on the dielectric layer is an octagon.

[0013] Optionally, the characteristic impedance of the microstrip feeder is 50 ohms.

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

[0015] 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 in the housing.

[0016] The beneficial effects of the embodiments of the present utility model are: Different from the prior art, the embodiments of the present utility model provide an antenna and a communication device, including: a radiation layer, an RF ground plane, and a dielectric layer, which are stacked in sequence. Among them, the radiation layer is provided with a radiator, a microstrip feeder, and an open stub. The microstrip feeder is connected to the radiator, and the open stub is connected to the microstrip feeder; the microstrip feeder is provided with a first slot; the radiator is provided with two second slots, and the two second slots are symmetric about the center line in the length direction of the microstrip feeder; the dielectric layer includes a first surface and a second surface arranged oppositely, the radiation layer is disposed on the first surface, and the RF ground plane is disposed on the second surface. Through the above structure, the present utility model can enable the antenna to form dual notch bands in the band, thereby effectively suppressing the in-band interference. Description of the Drawings

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to the drawings.

[0018] Figure 1 It is an exploded structural schematic diagram of the antenna provided by the embodiment of the present invention;

[0019] Figure 2 It is an assembled structural schematic diagram of the antenna provided by the embodiment of the present invention;

[0020] Figure 3 It is a schematic diagram of the antenna from a top view perspective provided by the embodiment of the present invention;

[0021] Figure 4 is Figure 3 a partial enlarged view of part C in;

[0022] Figure 5 It is a schematic diagram of the broadband antenna from a bottom view perspective provided by the embodiment of the present invention;

[0023] Figure 6 It is a schematic diagram of the broadband antenna from a top view perspective provided by the embodiment of the present invention;

[0024] Figure 7 It is a marked diagram of the broadband antenna from a bottom view perspective provided by the embodiment of the present invention;

[0025] Figure 8 It is a marked diagram of the broadband antenna from a top view perspective provided by the embodiment of the present invention;

[0026] Figure 9 It is a simulation diagram of the reflection coefficient of the broadband antenna provided by the embodiment of the present invention under preferred parameters;

[0027] Figure 10 It is a simulation result diagram of the maximum gain of the broadband antenna provided by the embodiment of the present invention under preferred parameters;

[0028] Figure 11 It is a simulation result diagram of the radiation efficiency of the broadband antenna provided by the embodiment of the present invention under preferred parameters;

[0029] Figure 12 It is a radiation pattern of the broadband antenna provided by the embodiment of the present invention at 4.0 GHz;

[0030] Figure 13 It is a radiation pattern of the broadband antenna provided by the embodiment of the present invention at 8.0 GHz;

[0031] Figure 14 It is the radiation pattern of the broadband antenna provided by the embodiment of the present utility model at 12.0 GHz. Detailed implementation manners

[0032] To facilitate the understanding of the present utility model, the present utility model will be described in more detail below with reference to the attached 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.

[0033] 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 intended 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.

[0034] Please refer to Figures 1-4, the antenna 1000 includes a radiation layer 3, a dielectric layer 2, and a radio frequency ground layer 1. Among them, the radiation layer 3, the dielectric layer 2, and the radio frequency ground layer 1 are stacked in sequence. The radiation layer 3 is responsible for radiating and receiving electromagnetic waves in the antenna 1000. Specifically, the radiation layer 3 has two working modes depending on its unique structure, namely the radiation mode and the receiving mode. In the radiation mode, the radiation layer 3 can convert the received electrical energy into electromagnetic wave energy and radiate the electromagnetic waves into the surrounding space, thereby ensuring that the antenna 1000 realizes the function of information transmission; in the receiving mode, the radiation layer 3 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 3 and the arrangement of each component in the radiation layer 3 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 3 and the radio frequency ground layer 1 of the antenna 1000, avoiding short circuits caused by direct contact between the radiation layer 3 and the radio frequency ground layer 1, 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 3 and the radio frequency ground layer 1, ensures that the radiation layer 3 can maintain its shape and position, thereby stably radiating and receiving electromagnetic waves, and further ensuring the overall structural strength of the antenna 1000, so that the working stability and reliability of the antenna 1000 are guaranteed. The radio frequency ground layer 1 is also called a ground conductor layer or a ground plane in some other embodiments. The radio frequency ground layer 1 is used to provide a reference potential and provide a stable working environment for the antenna 1000; it is used to reflect electromagnetic waves originating from below the radiation layer 3, reduce the radiation loss of the radiation layer 3 downward, enhance the radiation ability of the antenna 1000, and reduce radiation interference.

[0035] It can be understood that the radiation layer 3, the dielectric layer 2, and the radio frequency ground layer 1 together constitute a microstrip structure. The structural layout of the radiation layer 3 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 3 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 operating frequency, impedance bandwidth, and radiation performance of the antenna 1000.

[0036] For the above-mentioned radiation layer 3, please refer to Figure 1 , the radiation layer 3 is provided with a radiator 31, a microstrip feeder 33, and an open stub 32. The microstrip feeder 33 is connected to the radiator 31, and the open stub 32 is connected to the microstrip feeder 33. The microstrip feeder 33 is provided with a first slit 311; the radiator 31 is provided with two second slits 331, and the two second slits 331 are symmetric about the center line in the length direction of the microstrip feeder 33.

[0037] It can be understood that the perpendicular bisector of the microstrip feeder 33 coincides with the perpendicular bisector of the radiator 31, so that the microstrip feeder 33 and the radiator 31 as a whole present a symmetric structure.

[0038] It should be noted that the shape of the radiator 31 affects the radiation pattern of the antenna 1000. By adjusting the side lengths, angles of the radiator 31 with different shapes, and the relative positions with other components, the directivity of the antenna 1000 can be optimized, so that the antenna 1000 has stronger radiation ability in a specific direction and weaker radiation in other directions. In this embodiment, preferably, the projection of the radiator 31 on the dielectric layer 2 is an octagon, and the octagonal radiator 31 is a symmetric shape, so as to optimize the radiation path of the electromagnetic wave of the antenna 1000, reduce the loss of energy during transmission, and improve the radiation efficiency of the antenna 1000. Further, in order to simplify the processing method of the octagonal radiator 31, the octagonal radiator 31 can be composed of a rectangular radiation patch and two trapezoidal radiation patches. The long bottom side of the trapezoidal radiation patch is equal to the long side length of the rectangular radiation patch, and the long bottom side of the trapezoidal radiation patch is connected to the long side of the rectangular radiation patch. The two trapezoidal radiation patches are symmetrically arranged with respect to the rectangular radiation patch.

[0039] In some embodiments, the included angle between one of the second slits 331 and the center line in the length direction of the microstrip feeder 33 is 45°, and / or the included angle between the other second slit 331 and the center line in the length direction of the microstrip feeder 33 is 315°.

[0040] It should be noted that, in order to unify the measurement standard of the included angle, the length direction of the microstrip feeder 33 is specified as the X direction, and the counterclockwise direction is specified as the measurement standard direction of the included angle. As Figure 3 shown, the included angle A is 45°, and the included angle B is 315°.

[0041] In some embodiments, please refer to Figures 1-4, the first slot 311 provided on the microstrip feeder 33 is L-shaped, thereby increasing the coupling effect between the microstrip feeder 33 and the radiator 31 of the antenna 1000, helping to achieve better impedance matching, reducing the reflection of signals during transmission, improving the overall efficiency of the antenna 1000. Moreover, the L-shaped first slot 311 can excite multiple resonance modes, thereby broadening the impedance bandwidth of the antenna 1000. Further, the microstrip feeder 33 is provided with a first side line 332; the first slot 311 includes a first vertical slot 3311 and a first horizontal slot 3312. One end of the first vertical slot 3311 communicates with the first side line 332, the other end of the first vertical slot 3311 is connected to the first horizontal slot 3312, the first vertical slot 3311 is perpendicular to the center line in the length direction of the microstrip feeder 33, and the first horizontal slot 3312 is parallel to the center line in the length direction of the microstrip feeder 33.

[0042] In some embodiments, please refer to Figures 1-4 , the shape of the open stub 32 is L-shaped, thereby improving the circuit performance of the antenna 1000, enhancing the transmission efficiency of the antenna 1000, expanding the bandwidth to maintain stable performance, and achieving circular polarization to improve the anti-interference ability of the antenna 1000. Further, the microstrip feeder 33 is provided with a second side line 333; the open stub 32 includes a first vertical stub 321 and a first horizontal stub 322. One end of the first vertical stub 321 is connected to the second side line 333, the other end of the first vertical stub 321 is connected to the first horizontal stub 322, the first vertical stub 321 is perpendicular to the center line in the length direction of the microstrip feeder 33, and the first horizontal stub 322 is parallel to the center line in the length direction of the microstrip feeder 33.

[0043] It should be noted that the first side line 332 is parallel to the second side line 333, and the first vertical slot 3311 is parallel to the first vertical stub 321, and the first horizontal slot 3312 is parallel to the first horizontal stub 322.

[0044] In some embodiments, the projections of the first slot 311 and the open stub 32 on the RF ground layer 1 are all completely located on the RF ground layer 1. Through the shielding effect of the RF ground layer 1, the stray radiation of the microstrip feeder 33 is reduced, the overall performance of the antenna is improved, and the first slot 311 is also coupled with the radiator 31 to improve the radiation efficiency and radiation performance of the antenna 1000. Further, such a position layout makes the overall structure of the antenna 1000 more compact, thereby improving the integration of the antenna 1000.

[0045] The characteristic impedance of the microstrip feeder 33 is a crucial parameter, which 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 the transmission line, and 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 33 is 50 ohms.

[0046] 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 arranged opposite to each other, the radiation layer 3 is disposed on the first surface 21, and the RF ground layer 1 is disposed on the second surface 22.

[0047] In some embodiments, the perpendicular bisectors of the microstrip feeder 33, the radiator 31, and the RF ground layer 1 all coincide with the perpendicular bisector of the dielectric layer 2 to ensure that the radiation layer 3 is entirely located at the central position of the dielectric layer 2. Moreover, the microstrip feeder 33 includes a first alignment edge (not labeled) perpendicular to the X direction, and the dielectric layer 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.

[0048] It can be understood that the perpendicular bisectors of the microstrip feeder 33, the radiator 31, the RF ground layer 1, and the dielectric layer 2 are all parallel to the X direction.

[0049] It should be noted that the radiation performance of the antenna 1000 is determined by the size parameters of the radiator 31. The bandwidth and reflection coefficient of the antenna 1000 are jointly determined by the size parameters of the RF ground layer 1 and the radiator 31. The center frequency of the notch and the isolation degree at the notch center frequency are jointly determined by the size parameters of the L-shaped open stub 32 and the size parameters of the L-shaped first slot 331 on the 50-ohm microstrip feeder 33.

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

[0051] In the embodiment of the present utility model, the antenna 1000 includes a radiation layer 3, a dielectric layer 2, and a radio frequency ground layer 1. The radiation layer 3, the dielectric layer 2, and the radio frequency ground layer 1 are stacked in sequence. Among them, the radiation layer 3 is provided with a radiator 31, a microstrip feeder 33, and an open stub 32. The microstrip feeder 33 is connected to the radiator 31, and the open stub 32 is connected to the microstrip feeder 33. The microstrip feeder 33 is provided with a first slit 311; the radiator 31 is provided with two second slits 331, and the two second slits 331 are symmetric about the center line in the length direction of the microstrip feeder 33; the dielectric layer 2 includes a first surface 21 and a second surface 22 arranged oppositely. The radiation layer 3 is disposed on the first surface 21, and the radio frequency ground layer 1 is disposed on the second surface 22. Through the above structure, the antenna 1000 forms an in-band notch relying on the open stub 32 and the first slit 311, thereby effectively suppressing the in-band interference of the antenna 1000, and thus expanding the application of the antenna 1000 under different requirements of communication devices.

[0052] For the convenience of readers to better understand the concept of the present utility model, 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 5-8 , 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 0.762 mm; both the radiation layer 3 and the radio frequency ground layer 1 are made of copper plating material, and the thickness is 0.035 mm.

[0053] Please refer to Figure 7 and Figure 8 , it is specified that L P is the length of the dielectric layer 2, W P is the width of the dielectric layer 2 or the width of the radio frequency ground layer 1, L G is the length of the radio frequency ground layer 1, H R is the height of the rectangular radiation patch that constitutes the octagonal radiator 31, H T is the height of the trapezoidal radiation patch that constitutes the octagonal radiator 31, L R is the length of the rectangular radiation patch that constitutes the octagonal radiator 31 or the length of the long bottom side of the trapezoidal radiation patch that constitutes the octagonal radiator 31, L T is the length of the short bottom side of the trapezoidal radiation patch that constitutes the octagonal radiator 31, L S1 is the length of the second slit 331 located on the radiator 31, W S1 is the width of the second slit 331 located on the radiator 31, L S2 is the length of the first vertical slit 3311 that constitutes the L-shaped first slit 311, L S3 is the length of the first horizontal slit 3312 that constitutes the L-shaped first slit 311, W S2The width of the first horizontal slot 3312 of the first slot 311 forming an L shape, L1 is the length of the first vertical branch 321 of the open-circuit stub 32 forming an L shape, L2 is the length of the first horizontal branch 322 of the open-circuit stub 32 forming an L shape, W1 is the width of the first horizontal branch 322 of the open-circuit stub 32 forming an L shape, L F is the length of the microstrip feeder 33, W F is the width of the microstrip feeder 33.

[0054] Among them, the notch center frequencies f N1 、f N2 The relationship with the dimensional parameters of the open-circuit stub 32 in the L shape and the first slot 311 in the L shape is:

[0055]

[0056] Among them, ε r is the dielectric constant of the medium, and c is the speed of light in a vacuum.

[0057] Corresponding to the above structure, by optimizing the above design parameters, a design example can be obtained: L P = 30.0mm, W P = 30.0mm, W G = 9.8mm, H R = 12.0mm, H T = 8.0mm, L R = 19.0mm, L T = 3.0mm, L S1 = 8.0mm, W S1 = 0.4mm, L S2 = 0.2mm, L S3 = 5.8mm, W S1 = 0.1mm, L1 = 0.3mm, L2 = 8.9mm, W1 = 0.1mm, L F = 10.0mm, W F = 1.8mm wideband antenna 2000.

[0058] For the wideband antenna 2000 after parameter optimization, its reflection coefficient is as Figure 9 shown. From Figure 9It can be seen that the bandwidth range with a reflection coefficient less than -10 is from 3.6 GHz to 13.2 GHz, the center frequency is 8.4 GHz, the absolute bandwidth is 9.6 GHz, and the relative bandwidth is 114.3%, showing ultra-wideband characteristics; within the passband, there are also four transmission poles, located at 4.3 GHz, 7.6 GHz, 9.5 GHz, and 12.3 GHz respectively, ensuring the flatness of the maximum gain and radiation efficiency within the passband; there are also two transmission zeros at the notches, located at 5.7 GHz and 8.8 GHz, which can effectively suppress the in-band interference at this frequency.

[0059] The simulation result diagram of the maximum gain of the broadband antenna 2000 is as Figure 10 shown. From Figure 10 it can be seen that within the passband, its average maximum gain is 3.97 dBi, showing the advantage of high maximum gain; there is a notch at 5.7 GHz and 8.8 GHz respectively, and the gain at the center frequency of the notch is only -5.3 dBi and -7.72 dBi, showing the characteristics of high isolation.

[0060] The simulation result diagram of the maximum gain of the broadband antenna 2000 is as Figure 11 shown. From Figure 11 it can be seen that within the passband, its average radiation efficiency is 92.9%, showing the advantage of high radiation efficiency; there is a notch at 5.7 GHz and 8.8 GHz respectively, and the radiation efficiency at the center frequency of the notch is only 34.3% and 19.7%, showing the characteristics of high isolation.

[0061] The radiation patterns of the broadband antenna 2000 at 4.0 GHz, 8.0 GHz, and 12.0 GHz are as Figure 12 , Figure 13 and Figure 14 shown. From Figure 12 , Figure 13 and Figure 14 it can be seen that the broadband antenna 2000 is an omnidirectional broadband antenna 2000.

[0062] 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 embodiments, and details will not be repeated here. The antenna 1000 is disposed in the housing.

[0063] In some embodiments, the housing is provided with a receiving groove, and the antenna is received in the receiving groove to reduce the contact distance between the antenna 1000 and the external environment, thereby reducing the influence of the housing on the working state of the antenna 1000, and the receiving groove forms an effective limit for the antenna 1000, avoiding unexpected shaking of the antenna when the communication device is subjected to an external force.

[0064] In some embodiments, by integrating the housing and the antenna, for example, fixing the antenna within the insulating region of the housing, such a structure can achieve seamless integration of the antenna and the housing, improving the overall aesthetics and structural strength.

[0065] It should be noted that the description and drawings of the present utility model have given 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, and an open stub, wherein the microstrip feeder is connected to the radiator, and the open stub is connected to the microstrip feeder; The microstrip feeder is provided with a first slot; The radiator is provided with two second slots, and the two second slots are symmetric about the center line in the length direction of the microstrip feeder; A radio frequency ground plane; A dielectric layer includes a first surface and a second surface disposed 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.

2. The antenna according to claim 1, wherein The included angle between one of the second slots and the center line in the length direction of the microstrip feeder is 45°, and / or the included angle between the other second slot and the center line in the length direction of the microstrip feeder is 315°.

3. The antenna according to claim 1, wherein The shape of the first slot is L-shaped.

4. The antenna according to claim 3, wherein The microstrip feeder is provided with a first side line; The first slot includes a first vertical slot and a first horizontal slot. One end of the first vertical slot communicates with the first side line, the other end of the first vertical slot is connected to the first horizontal slot, the first vertical slot is perpendicular to the center line in the length direction of the microstrip feeder, and the first horizontal slot is parallel to the center line in the length direction of the microstrip feeder.

5. The antenna according to claim 1, wherein The shape of the open stub is L-shaped.

6. The antenna according to claim 5, wherein The microstrip feeder is provided with a second side line; The open stub includes a first vertical stub and a first horizontal stub. One end of the first vertical stub is connected to the second side line, the other end of the first vertical stub is connected to the first horizontal stub, the first vertical stub is perpendicular to the center line in the length direction of the microstrip feeder, and the first horizontal stub is parallel to the center line in the length direction of the microstrip feeder.

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 The characteristic impedance of the microstrip feeder is 50 ohms.

9. The antenna according to any one of claims 1-8, wherein The perpendicular bisector of the microstrip feeder, the perpendicular bisector of the radiator, and the perpendicular bisector of the radio frequency ground plane all coincide with the perpendicular bisector of the dielectric layer.

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

Images