Antenna

Abstract

The utility model discloses an antenna. The antenna comprises an antenna radiator assembly, an antenna ground assembly and a short-circuit microstrip line assembly. The antenna radiator assembly and the short-circuit microstrip line assembly are connected with the antenna ground assembly. The short-circuit microstrip line assembly is configured to short-circuit an electrostatic signal in an environment where the antenna is located to the antenna ground assembly. According to the antenna provided by the embodiment of the invention, the short-circuit microstrip line assembly is arranged to perform ground short circuit on interference signals in the environment where the antenna is located, so that the interference degree of the interference signals with relatively low strength on the signal receiving and transmitting process of the antenna is reduced, and irreparable negative effects such as breakdown of strong interference signals such as thunder and lightning on the performance of the antenna are prevented; therefore, the anti-interference capability of the antenna is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of communication, in particular to an antenna. BACKGROUND

[0002] The current wireless communication device has increasingly high requirements for the characteristics of the antenna, especially the anti-interference ability, but the resistance of the conventional antenna in the related technology to the external electromagnetic wave or current interference cannot meet the requirements. CONTENT OF THE INVENTION

[0003] The present application provides an antenna.

[0004] The antenna provided by the present application includes an antenna radiator assembly, an antenna ground assembly and a short-circuit microstrip line assembly, wherein the antenna radiator assembly and the short-circuit microstrip line assembly are connected with the antenna ground assembly.

[0005] The short-circuit microstrip line assembly is configured to short the electrostatic signal in the environment of the antenna to the antenna ground assembly.

[0006] In this way, the antenna in the present application short-circuits the interference signal in the environment of the antenna to the ground through the short-circuit microstrip line assembly, reduces the interference degree of the interference signal with low intensity on the process of receiving and transmitting signals of the antenna, prevents the strong interference signal such as lightning from causing irreversible negative effects on the performance of the antenna, and improves the anti-interference ability of the antenna.

[0007] In some embodiments, the antenna further includes a substrate, the antenna radiator assembly is arranged on a first surface of the substrate, and the short-circuit microstrip line assembly is arranged on a second surface of the substrate, wherein the second surface is opposite to the first surface.

[0008] In this way, the antenna in the present application can further strengthen the protection of the antenna radiator assembly by arranging the antenna radiator assembly and the short-circuit microstrip line assembly on the two surfaces of the substrate and grounding them at the same time.

[0009] In some embodiments, the substrate is provided with a through hole, the antenna ground assembly is arranged on a first surface of the substrate, and the antenna ground assembly and the short-circuit microstrip line assembly are connected through the through hole.

[0010] In this way, the antenna in the present application can maintain the connection between the antenna ground assembly and the short-circuit microstrip line assembly while ensuring that the antenna radiator assembly and the short-circuit microstrip line assembly are arranged on the two surfaces of the substrate.

[0011] In some embodiments, the antenna radiator assembly includes a first sub-radiator disposed at a first end of the substrate, the first sub-radiator configured to increase a radiation area of in-phase current.

[0012] Thus, the antenna in the embodiments of the present application increases the radiation area of in-phase current by disposing the first sub-radiator.

[0013] In some embodiments, the first sub-radiator is provided with a metal sheet, an area of the metal sheet being positively correlated with a length of the first sub-radiator.

[0014] Thus, the antenna in the embodiments of the present application adjusts the resonance and bandwidth of the antenna in the low-frequency signal range by disposing the metal sheet on the first sub-radiator.

[0015] In some embodiments, the antenna radiator assembly includes a second sub-radiator, a first end of the second sub-radiator being connected with the first sub-radiator.

[0016] The second sub-radiator includes a plurality of radiation conductors arranged in a folded manner.

[0017] Thus, the antenna in the embodiments of the present application adjusts the current phase of the antenna in the low-frequency signal range by disposing a second sub-radiator arranged in a folded manner, so as to improve the gain of the antenna in the low-frequency signal range.

[0018] In some embodiments, the antenna radiator assembly includes a third sub-radiator, a first end of the third sub-radiator being connected with a second end of the second sub-radiator, the third sub-radiator configured to adjust a resonance bandwidth of the antenna.

[0019] Thus, the antenna in the embodiments of the present application adjusts the resonance bandwidth of the antenna by disposing the third sub-radiator, so as to further improve the working performance of the antenna in the low-frequency signal range.

[0020] In some embodiments, the antenna radiator assembly further includes a fourth sub-radiator, the fourth sub-radiator connected with a second end of the third sub-radiator, the fourth sub-radiator connected with the antenna ground assembly.

[0021] Thus, the antenna in the embodiments of the present application further realizes the connection between the antenna radiator assembly and the antenna ground assembly by disposing the fourth sub-radiator.

[0022] In some embodiments, the fourth sub-radiator is provided with a first microstrip line and a second microstrip line, a gap being disposed between the first microstrip line and the second microstrip line.

[0023] Therefore, the antenna in the embodiment of the present application improves the impedance matching effect and widens the bandwidth of the low-frequency signal range by arranging two groups of microstrip lines on the fourth sub-radiating element and using the slot coupling technology to load capacitance, and improves the working performance of the antenna.

[0024] In some embodiments, the antenna ground assembly comprises a plurality of parallel and equally spaced ground conductors, and lengths of adjacent ground conductors are different.

[0025] Therefore, the antenna in the embodiment of the present application widens the working frequency band of the antenna in the high-frequency signal range by using the slot coupling technology to expand the antenna in the high-frequency signal range through the antenna ground assembly designed in the dual-frequency structure.

[0026] In some embodiments, the ground conductors are arranged symmetrically according to the length axis.

[0027] Therefore, the antenna in the embodiment of the present application realizes the function similar to the staggered tuning in the circuit by arranging the stepped ground in a concave symmetrical structure, and effectively widens the impedance bandwidth.

[0028] Additional aspects and advantages of the embodiments of the present application will be in part apparent and in part pointed out hereinafter in the description of the embodiments of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0029] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings in which:

[0030] Figure 1 FIG. 1 is a structural schematic diagram of a first surface of an antenna in an embodiment of the present application;

[0031] Figure 2 FIG. 2 is a structural schematic diagram of a second surface of the antenna in the embodiment of the present application;

[0032] Figure 3 FIG. 3 is a size schematic diagram of a second sub-radiating element in the embodiment of the present application.

[0033] In the drawings: 10, antenna; 11, substrate; 12, antenna radiating element assembly; 121, first sub-radiating element; 122, second sub-radiating element; 123, third sub-radiating element; 124, fourth sub-radiating element; 13, antenna ground assembly; 14, short-circuit microstrip line assembly; A, through hole; B, first microstrip line; C, second microstrip line. DETAILED DESCRIPTION

[0034] Embodiments of the present application are described below in detail, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary only, and are used only for explaining the embodiments of the present application, and cannot be understood as limiting the embodiments of the present application.

[0035] Referring to Figure 1 and Figure 2 The antenna 10 in the embodiments of the present application includes an antenna radiator assembly 12, an antenna ground assembly 13, and a short-circuit microstrip line assembly 14, and the antenna radiator assembly 12, the antenna ground assembly 13, and the short-circuit microstrip line assembly 14 are connected in pairs.

[0036] The short-circuit microstrip line assembly 14 is configured to short the electrostatic signal in the environment where the antenna 10 is located to the antenna ground assembly 13.

[0037] Specifically, the antenna 10 in the embodiments of the present application includes the antenna radiator assembly 12, the antenna ground assembly 13, and the short-circuit microstrip line assembly 14, wherein the antenna radiator assembly 12 and the antenna ground assembly 13 are connected, and the short-circuit microstrip line assembly 14 and the antenna ground assembly 13 are also connected. The antenna radiator assembly 12 serves as the radiator of the antenna 10 to realize the transmission and reception of electromagnetic signals. The antenna ground assembly 13 serves as the ground terminal of the antenna 10, and protects the antenna radiator assembly 12 through the connection between the antenna radiator assembly 12 and the antenna ground assembly 13.

[0038] In particular, the short-circuit microstrip line assembly 14 is provided and connected with the antenna ground assembly 13, so that the short-circuit microstrip line assembly 14 can directly short the interference signals such as electrostatic signals and lightning in the environment where the antenna 10 is located to the antenna ground assembly 13, thereby removing the interference signal factors in the environment where the antenna 10 is located within a certain range to improve the anti-interference ability of the antenna 10 as a whole. In this way, when the intensity of the interference signal factor is low, the provision of the short-circuit microstrip line assembly 14 can reduce the degree of interference of the antenna 10 in signal transmission and reception, and in the case of lightning and other high-intensity interference signal factors, the provision of the short-circuit microstrip line assembly 14 can short the interference signal factors to the antenna ground assembly 13 through the connection with the antenna ground assembly 13, thereby protecting the antenna radiator assembly 12 to protect the antenna 10 within a certain range and avoid the antenna 10 being punctured by lightning and other strong interference factors.

[0039] Therefore, the antenna in the embodiments of the present application can short the interference signal in the environment to the ground through the short-circuit microstrip line assembly, reduce the interference degree of the antenna receiving and transmitting signal process caused by the interference signal with low intensity, prevent the strong interference signal such as lightning from causing irreparable negative impact on the performance of the antenna, and improve the anti-interference ability of the antenna.

[0040] Referring to Figure 1 and Figure 2 In some embodiments, the antenna 10 further comprises a substrate 11, the antenna radiator assembly 12 is arranged on a first surface of the substrate 11, and the short-circuit microstrip line assembly 14 is arranged on a second surface of the substrate 10, wherein the second surface is opposite to the first surface.

[0041] Specifically, on the basis of the above-mentioned embodiments, the antenna 10 is further provided with a substrate 11 to carry the above-mentioned antenna radiator assembly 12, antenna ground assembly 13 and short-circuit microstrip line assembly 14. The above-mentioned substrate 11 generally selects FR-4 grade resin material as the base material, which has good insulation performance, stable dielectric constant and long service life. Among them, the antenna radiator assembly 12 is arranged on the front surface of the substrate 11 (corresponding to the above-mentioned first surface), and the short-circuit microstrip line assembly 14 is arranged on the back surface of the substrate 11 (corresponding to the above-mentioned second surface). Since the purpose of arranging the short-circuit microstrip line assembly 14 is to short the interference signal to the antenna ground assembly 13 to protect the antenna radiator assembly 12, and the substrate 11 has good insulation performance, arranging the antenna radiator assembly 12 and the short-circuit microstrip line assembly 14 on both surfaces of the substrate 11 can make the protection of the antenna radiator assembly 12 more sufficient.

[0042] As for which surface of the substrate 11 the antenna ground assembly 13 is arranged on, it can be adjusted according to the actual situation. For example, the antenna ground assembly 13 and the antenna radiator assembly 12 can be arranged on the front surface of the substrate 11 to facilitate the arrangement of the connection relationship between them, or the antenna ground assembly 13 can be arranged on the back surface of the substrate 11 to facilitate the arrangement of the connection relationship between the short-circuit microstrip line assembly 14 and the antenna ground assembly 13.

[0043] Therefore, the antenna in the embodiments of the present application can further strengthen the protection of the antenna radiator assembly by arranging the antenna radiator assembly and the short-circuit microstrip line assembly on both surfaces of the substrate and grounding them at the same time.

[0044] Referring to Figure 1 and Figure 2 In some embodiments, the substrate 11 is provided with a through hole, the antenna ground assembly 13 is arranged on the first surface of the substrate 11, and the antenna ground assembly 13 and the short-circuit microstrip line assembly 14 are connected through the through hole.

[0045] Specifically, based on the above-mentioned embodiments, exemplarily, the antenna ground assembly 13 and the antenna radiator assembly 12 are arranged on the front surface of the substrate 11. In addition, a through hole A is further arranged on the substrate 11, and the antenna ground assembly 13 and the short-circuit microstrip line assembly 14 are connected through the through hole A. In this way, the connection between the antenna ground assembly 13 and the antenna radiator assembly 12 can be more conveniently arranged, and the connection between the antenna ground assembly 13 and the short-circuit microstrip line assembly 14 can be arranged while ensuring that the antenna radiator assembly 12 and the short-circuit microstrip line assembly 14 are arranged on the two surfaces of the substrate 11, so as to realize the protection of the antenna radiator assembly 12.

[0046] Thus, the antenna in the embodiments of the present application can keep the connection between the antenna ground assembly and the short-circuit microstrip line assembly while ensuring that the antenna radiator assembly and the short-circuit microstrip line assembly are arranged on the two surfaces of the substrate.

[0047] Please refer to Figure 1 In some embodiments, the antenna radiator assembly 12 comprises a first sub-radiator 121, and the first sub-radiator 121 is arranged on the first end of the substrate 11, and the first sub-radiator 121 is configured to increase the radiation area of the in-phase current.

[0048] In some embodiments, the first sub-radiator 121 is provided with a metal sheet, and the area of the metal sheet is positively correlated with the length of the first sub-radiator 121.

[0049] Specifically, based on the above-mentioned embodiments, exemplarily, the antenna radiator assembly 12 comprises a plurality of sub-radiators, and each sub-radiator has different effects on the performance of the antenna 10. First, please refer to Figure 1 The antenna radiator assembly 12 comprises a first sub-radiator 121, and the first sub-radiator 121 is arranged on one end of the front surface of the substrate 11, and in use, the end where the first sub-radiator 121 is arranged can be directly arranged in the external environment. The length of the first sub-radiator 121 is generally the longest in the antenna radiator assembly 12, and its main function is to tune the low-frequency signal and increase the radiation area of the in-phase current, thereby improving the overall signal gain of the antenna 10.

[0050] Further, in some examples, a metal sheet (not shown in the figure) can be further arranged on the first sub-radiator 121 to assist the first sub-radiator 121 in adjusting the low-frequency resonance and low-frequency signal bandwidth of the antenna 10. The arrangement position of the metal sheet on the first sub-radiator 121 can be adjusted according to actual conditions, which is not limited in the present application. The area of the metal sheet is positively correlated with the length of the first sub-radiator 121, and the longer the length of the first sub-radiator 121, the larger the area of the metal sheet, so as to meet the functional needs of adjusting the low-frequency resonance and low-frequency signal bandwidth of the antenna 10.

[0051] Thus, the antenna in the embodiments of the present application increases the radiation area of the in-phase current by the arrangement of the first sub-radiator, and further adjusts the resonance and bandwidth of the antenna in the low-frequency signal range by arranging the metal sheet on the first sub-radiator.

[0052] Further referring to Figure 1 , the antenna-radiator assembly 12 further comprises a second sub-radiator 122, one end of the second sub-radiator 122 is connected to the first sub-radiator 121.

[0053] The second sub-radiator 122 comprises a plurality of radiating conductors arranged in a folded manner.

[0054] Specifically, based on the above-mentioned embodiments, the antenna-radiator assembly 12 further comprises a second sub-radiator 122, one end of the second sub-radiator 122 is connected to the first sub-radiator 121. Referring to Figure 1 , the second sub-radiator 122 comprises a plurality of radiating conductors serving as radiators, and the radiating conductors are arranged in a folded manner, so that the second sub-radiator 122 as a whole presents a folded linear shape. Such a shape can lengthen the total length of the second sub-radiator 122, so as to adjust the current phase of the low-frequency signal and improve the gain of the antenna 10 in the low-frequency signal range.

[0055] Thus, the antenna in the embodiments of the present application adjusts the current phase of the antenna in the low-frequency signal range by arranging a second sub-radiator in a folded manner, so as to improve the gain of the antenna in the low-frequency signal range.

[0056] In some embodiments, the antenna-radiator assembly 12 further comprises a third sub-radiator 123, one end of the third sub-radiator 123 is connected to the second end of the second sub-radiator 122, and the third sub-radiator 123 is configured to adjust the resonance bandwidth of the antenna 10.

[0057] Specifically, based on the above-mentioned embodiments, the antenna-radiator assembly 12 further comprises a third sub-radiator 123, the first sub-radiator 121 and the third sub-radiator 123 are respectively connected to the two ends of the second sub-radiator 122 in the above-mentioned embodiments. As a part of the antenna-radiator assembly 12, the main function of the third sub-radiator 123 is to adjust the resonance bandwidth of the antenna 10 as a whole, so as to improve the working performance of the antenna 10 in the low-frequency signal range.

[0058] Thus, the antenna in the embodiments of the present application adjusts the resonance bandwidth of the antenna by arranging a third sub-radiator, so as to further improve the working performance of the antenna in the low-frequency signal range.

[0059] In some embodiments, the antenna radiator assembly 12 further comprises a fourth sub-radiator 124 connected to the second end of the third sub-radiator 123, and the fourth sub-radiator 124 is connected to the antenna ground assembly 13.

[0060] In some embodiments, the fourth sub-radiator 124 is provided with a first microstrip line B and a second microstrip line C, and a gap is arranged between the first microstrip line B and the second microstrip line C.

[0061] Further, the antenna radiator assembly 12 further comprises a fourth sub-radiator 124, the third sub-radiator 123 is connected to the fourth sub-radiator 124, and the third sub-radiator 123 and the fourth sub-radiator 124 can be integrally arranged, and the fourth sub-radiator 124 is directly connected to the antenna ground assembly 13 by arranging a trace on the substrate 11. The fourth sub-radiator 124 is used to distribute the loading capacitance, thereby providing a positive effect in terms of impedance matching, and at the same time, the bandwidth in the low-frequency signal range is expanded by using the meander coupling through the gap coupling, and the phenomenon of high-frequency resonance being too high is suppressed, thereby improving the overall performance of the antenna 10. In order to adapt to the above functions, the fourth sub-radiator 124 comprises a first microstrip line B and a second microstrip line C, please refer to Figure 1 , the first microstrip line B and the second microstrip line C are arranged on the two sides of the fourth sub-radiator 124, respectively, and form a "concave" shape with the main body of the fourth sub-radiator 124, so that a gap is formed between the first microstrip line B and the second microstrip line C, thereby forming a gap coupling relationship. In addition, the above-mentioned gap coupling relationship is beneficial to impedance matching and widening the bandwidth of the low-frequency signal range, and to a certain extent, it is also beneficial to reducing the overall height of the antenna 10. For example, the height of the antenna using the antenna radiator assembly 12 in the above-mentioned embodiment can be controlled to about 460 mm, which can be adapted to most outdoor small base stations in the related art.

[0062] Therefore, the antenna in the embodiments of the present application further realizes the connection between the antenna radiator assembly and the antenna ground assembly by arranging the fourth sub-radiator, and by arranging two groups of microstrip lines on the fourth sub-radiator, the gap coupling technology is used to distribute the loading capacitance, thereby improving the impedance matching effect and widening the bandwidth of the low-frequency signal range, and improving the working performance of the antenna.

[0063] It should be noted that the electromagnetic signal in the low-frequency signal range in the above-mentioned embodiments refers to an electromagnetic signal with a frequency in the range of 900 MHz to 960 MHz.

[0064] For the size of the second sub-radiator 122, please refer to Figure 3For example, the width of the radiating conductor connected with the first sub-radiator 121 and the width of the radiating conductor connected with the third sub-radiator 123 are both 2mm, and the width of the other radiating conductors is 1.5mm. In addition, the length of each radiating conductor in the direction parallel to the length of the substrate is 7.5mm, the length of each radiating conductor in the direction parallel to the width of the substrate is 12.8mm, the width of the substrate is 15mm, and the length of the second sub-radiator 122 is 83.5mm. The above-mentioned lengths are the lengths of the line segments with the connection points of the first sub-radiator 121 and the third sub-radiator 123 as the endpoints. It should be noted that the above-mentioned dimensions are only exemplary, and the specific dimensions can be adjusted according to the actual situation, which is not limited in the present application.

[0065] In some embodiments, the antenna ground assembly 13 comprises a plurality of parallel and equally spaced ground conductors, and the lengths of adjacent ground conductors are different.

[0066] In some embodiments, the ground conductors are arranged symmetrically according to the length axis.

[0067] Specifically, on the basis of the above-mentioned embodiments, please further refer to Figure 1 The antenna ground assembly 13 comprises a plurality of parallel and equally spaced ground conductors, and the lengths of adjacent ground conductors are different. For example, please refer to the case shown in Figure 1 The plurality of ground conductors are arranged in parallel and equally spaced to form a stepped antenna ground assembly 13. Such a dual-frequency structure design can expand the working frequency band of the antenna 10 in the high-frequency signal range by using the slot coupling technology. The above-mentioned high-frequency signal range refers to the frequency range of 2400MHz-2500MHz.

[0068] Further, the stepped antenna ground assembly 13 can be arranged symmetrically according to the length, please refer to the antenna ground assembly 13 in Figure 1 , Figure 1 The antenna ground assembly 13 comprises five groups of ground conductors arranged symmetrically with the middle line of the width of the substrate 11 as the axis of symmetry. The ground conductors on the two sides are the shortest, the ground conductors coinciding with the middle line of the width of the substrate 11 are the second shortest, and the ground conductors arranged between the ground conductors on the two sides and the ground conductors coinciding with the middle line of the width of the substrate 11 are the longest. Such an arrangement can form a symmetrically arranged "concave" shaped stepped ground. The above-mentioned symmetrically arranged "concave" shaped stepped ground can make the antenna ground assembly 13 play a role similar to the uneven tuning in the circuit, thereby effectively widening the impedance bandwidth.

[0069] Therefore, the antenna in the embodiments of the present application expands the working frequency band of the antenna in the high frequency signal range by using the slot coupling technology and effectively widens the impedance bandwidth by arranging the antenna ground assembly in a step-shaped concave symmetrical structure to realize the function of the uneven tuning in the circuit.

[0070] On the basis of the above-mentioned embodiments, the antenna 10 using the antenna radiator assembly 12, the antenna ground assembly 13 and the short-circuit microstrip line assembly 14 in the above-mentioned embodiments is exemplarily taken as an example, and the following performance parameters or performance effect examples can be obtained through experimental verification:

[0071] ①The voltage standing wave ratio (VSWR) is less than 2 in the frequency range of 900MHz-960MHz and the frequency range of 2400MHz-2500MHz.

[0072] ②The maximum signal gain is greater than 4.5dBi in the frequency range of 900MHz-960MHz, and the maximum signal gain is greater than 5dBi in the frequency range of 2400MHz-2500MHz.

[0073] ③The antenna 10 efficiency is greater than 60% in the frequency range of 900MHz-960MHz, and the antenna 10 efficiency is greater than 65% in the frequency range of 2400MHz-2500MHz.

[0074] ④The height is 460mm, the overall size is 460mmx15mmx1.034mm, the substrate 11 is 15mm wide, and the overall thickness of the antenna 10 is 1.034mm.

[0075] ⑤The direct current ground (DC Ground) short-circuit design is realized by the short-circuit microstrip line assembly 14.

[0076] ⑥The antenna radiator assembly can be protected within a certain range, so that the antenna is protected from breakdown caused by lightning.

[0077] In the description of the present specification, the description of the terms "certain embodiments", "in one example", "exemplarily", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above-mentioned terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction.

[0078] Any procedural or methodological descriptions in flow charts or otherwise described herein can be understood to represent modules, segments or portions of code that include executable instructions for implementing the specified logical function or process(es), and the scope of preferred embodiments of the present application includes additional implementations that can not perform the functions in the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, as will be understood by those skilled in the art to which embodiments of the present application pertain.

[0079] Although the embodiments of the present application have been shown and described above, it is to be understood that the above-described embodiments are exemplary only, and are not to be construed as limiting the present application, and that variations, modifications, substitutions and changes can be made to the above-described embodiments by one of ordinary skill in the art without departing from the scope of the present application.

Claims

1. An antenna, characterized by The antenna comprises an antenna radiator assembly, an antenna ground assembly and a short-circuit microstrip line assembly, the antenna radiator assembly and the short-circuit microstrip line assembly are connected with the antenna ground assembly. The short-circuit microstrip line assembly is configured to short the electrostatic signal in the environment where the antenna is located to the antenna ground assembly.

2. The antenna according to claim 1, characterized in that, The antenna further comprises a substrate, the antenna radiator assembly is arranged on a first surface of the substrate, and the short-circuit microstrip line assembly is arranged on a second surface of the substrate, wherein the second surface is opposite to the first surface.

3. The antenna according to claim 2, characterized in that, The substrate is provided with a through hole, the antenna ground assembly is arranged on the first surface of the substrate, and the antenna ground assembly is connected with the short-circuit microstrip line assembly through the through hole.

4. The antenna according to claim 2 or 3, characterized in that The antenna radiator assembly comprises a first sub-radiator, the first sub-radiator is arranged at a first end of the substrate, and the first sub-radiator is configured to increase the radiation area of the in-phase current.

5. The antenna according to claim 4, characterized in that, The first sub-radiator is provided with a metal sheet, and the area of the metal sheet is positively correlated with the length of the first sub-radiator.

6. The antenna according to claim 4, wherein, The antenna radiator assembly comprises a second sub-radiator, a first end of the second sub-radiator is connected with the first sub-radiator. The second sub-radiator comprises a plurality of radiation conductors arranged in a folding manner.

7. The antenna according to claim 6, characterized in that, The antenna radiator assembly comprises a third sub-radiator, a first end of the third sub-radiator is connected with a second end of the second sub-radiator, and the third sub-radiator is configured to adjust the resonant bandwidth of the antenna.

8. The antenna according to claim 7, characterized in that, The antenna radiator assembly further comprises a fourth sub-radiator, the fourth sub-radiator is connected with a second end of the third sub-radiator, and the fourth sub-radiator is connected with the antenna ground assembly.

9. The antenna according to claim 8, characterized in that, The fourth sub-radiator is provided with a first microstrip line and a second microstrip line, and a gap is arranged between the first microstrip line and the second microstrip line.

10. The antenna according to claim 1, wherein, The antenna ground assembly comprises a plurality of ground conductors arranged in parallel and at equal intervals, and lengths of adjacent ground conductors are different.

11. The antenna according to claim 10, characterized in that, The ground conductors are arranged in axial symmetry according to the length.

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