Radiator with metasurface superstrate (MSS) for multi-band antenna device

Abstract

The present disclosure provides a multi-band antenna device (100), the multi-band antenna device (100) comprising a first dipole radiating element (104), a second radiating element (106) and a metasurface superstrate (MSS) structure (108). The first dipole radiating element is used to operate in a first frequency band and is arranged on an upper plane of a support structure (112) at a first distance from a reflector (110). The second radiating element is used to operate in a second frequency band and is arranged on a lower plane of the support structure at a second distance from the reflector. The second distance is smaller than the first distance. The second frequency band is higher than the first frequency band. The MSS structure is arranged in a region within an arm of the first dipole radiating element and enhances the performance of the second radiating element to increase the directivity and gain of the multi-band antenna device.

Description

Technical Field

[0001] The present disclosure relates to communication technology, and more particularly, to a multi-band antenna device having a radiator to achieve higher directivity and gain, the radiator having a metasurface superstrate (MSS). In addition, the present disclosure also relates to a method for manufacturing the multi-band antenna device. Background Art

[0002] Modern mobile communication networks usually use frequency bands licensed by network providers for data communication. Mobile communication networks include several base station (BTS) antennas. The BTS antenna includes an antenna body and a radome, which is the top cover of the BTS antenna. The radome protects the BTS antenna from adverse weather conditions. The antenna body includes an antenna radiator, which is used to radiate sufficient power at a higher elevation angle for data transmission. Various key performance indicators (KPIs) of the antenna body (i.e., directivity, gain, front-to-back (FBR) ratio, effective isotropic radiated power (EIRP), etc.) play a major role in evaluating the performance of the BTS antenna. The design of the antenna radiator also plays an important role in improving the KPI of the antenna body.

[0003] Existing methods focus on developing antenna radiators with improved shapes, designs, dimensions, etc. However, each material used to design antenna radiators has its natural and scientific limitations. Ultimately, the antenna radiators developed by existing methods attempt to achieve the maximum KPI. In order to achieve the maximum KPI, existing methods mainly focus on the design of the antenna radiator.

[0004] Increasing BTS antenna directivity and gain becomes very important when designing antenna radiators. It depends on many parameters, including the size of the antenna aperture and the area illuminated by the antenna radiator. Since the size of BTS antennas is standard and limited, the aperture size cannot be increased by traditional methods. The idea of ​​placing directors and overlays perpendicular to the antenna radiator can also increase the directivity of the antenna radiator. However, historically, adding overlays has increased the dielectric board layer, which greatly increases the weight of the BTS antenna. Another problem with overlays is its effectiveness in a multi-band environment, because the overlay helps one band but degrades the performance of another band. In existing systems, the main antenna radiator and the metasurface are perpendicular to each other, forming a cavity. In addition, the metasurface includes a dielectric board layer. Therefore, the BTS antenna structure becomes bulky due to the arrangement of the main antenna radiator, the metasurface and its multiple layers. In addition, the BTS antenna structure is limited to a narrow frequency band. And the existing antenna radiator uses a surface wave through a guided medium to generate a narrow Gaussian beam through a planar lens. Although the design of the existing system improves the KPI of the antenna, it is still not suitable for base station antennas due to reasons such as the complexity, size and frequency band limitation of the antenna.

[0005] Therefore, there is a need to solve the above technical deficiencies in the prior art for producing antennas. Summary of the invention

[0006] An object of the present disclosure is to provide a method of increasing the directivity and gain of a multi-band antenna device, which method is cost-effective and easy to implement.

[0007] This object is achieved by the features of the independent claim. Further implementations are apparent from the dependent claims, the description and the drawings.

[0008] The present disclosure provides a multi-band antenna device and a method for manufacturing the multi-band antenna device to achieve higher directivity and gain.

[0009] According to a first aspect, a multi-band antenna device is provided. The multi-band antenna device includes a first dipole radiating element, a second radiating element and a metasurface superstrate (MSS) structure. The first dipole radiating element is used to operate in a first frequency band and is arranged on an upper plane of a support structure at a first distance from a reflector. The second radiating element is used to operate in a second frequency band and is arranged on a lower plane of the support structure at a second distance from the reflector. The second distance is less than the first distance. The second frequency band is higher than the first frequency band. The MSS structure is arranged in a region within an arm of the first dipole radiating element. The MSS structure is used to enhance the performance of the second radiating element.

[0010] The MSS structure arranged in the region within the arm of the first dipole radiating element increases the directivity of the second radiating element without reducing the performance parameters of the first dipole radiating element, such as gain, radiation pattern, bandwidth, etc. In addition, the multi-band antenna device effectively utilizes the area between the first dipole radiating element and the second radiating element. In addition, since the MSS structure is arranged in the region within the arm of the first dipole radiating element, the performance parameters of the first dipole radiating element are not reduced. The MSS structure may include one or more tunable unit cells, thereby increasing the directivity and gain of the multi-band antenna device and enabling the multi-band antenna device to operate over a wide frequency band. The design parameters of the multi-band antenna device, such as inter-band isolation, sidelobe level, return loss, and intra-column coupling, are improved by tuning the length, width, height, and gap between one or more unit cells of the MSS structure. The impedance of the surface of the MSS structure is also optimized by tuning the length, width, height, and gap between the unit cells of the MSS structure. The multi-band antenna device having the MSS structure has advantages due to its compact size. In addition, the multi-band antenna device according to the first aspect is cost-effective.

[0011] In a first possible implementation of the multi-band antenna device of the first aspect, the MSS structure is arranged on the upper plane of the support structure. The arrangement of the MSS structure on the upper plane of the support structure utilizes the area available in the arm of the first dipole radiating element. In addition, the multi-band antenna device effectively utilizes the area between the first dipole radiating element and the second radiating element to improve the performance of the multi-band antenna device.

[0012] In the first aspect itself or in a second possible implementation manner according to the first implementation manner of the first aspect, the MSS structure includes a square metal patch.

[0013] In the first aspect itself or in a third possible implementation of any one of the above implementations of the first aspect, the MSS structure includes a cross-shaped metal patch. The shape of the metal patch can be changed to achieve enhanced performance of the multi-band antenna device. The shape of the metal patch is optimized to be a square or a cross. The optimized metal patch is arranged in the region of the arm of the first dipole radiating element to improve the performance of the multi-band antenna device.

[0014] In the first aspect itself or in a fourth possible implementation of any one of the implementations of the first aspect, the MSS structure includes multiple layers. The multiple layers of the MSS structure support a multi-band environment so that the multi-band antenna device can operate in a wide frequency band range.

[0015] In a fifth possible implementation of the fourth implementation of the first aspect, the MSS structure includes a layer arranged on an upper surface of the upper plane of the support structure.

[0016] In the fourth implementation of the first aspect or a sixth possible implementation of the fifth implementation of the first aspect, the MSS structure includes a layer arranged on a lower surface of the upper plane of the support structure. The multiple layers of the MSS structure do not affect the weight or structure of the multi-band antenna device. Therefore, the size of the multi-band antenna device is compact and remains the same even when the MSS structure has the multiple layers.

[0017] In a seventh possible implementation of the first aspect itself or any one of the implementations of the first aspect, the multi-band antenna device further includes a third radiating element. The third radiating element is used to operate in a third frequency band and is arranged at a third distance from the reflector. The third distance is less than the second distance. The third frequency band is higher than the second frequency band. The MSS structure is also used to enhance the performance of the third radiating element.

[0018] The third radiating element at a third distance from the reflector and the second radiating element at a second distance from the reflector respectively optimize the shape of the MSS structure in the two frequency bands. The arrangement of the third radiating element together with the first dipole radiating element and the second radiating element forms a three-band antenna device. The shape of the optimized MSS structure provides a multi-band environment for the multi-band antenna device so that the multi-band antenna device can operate within a wide frequency band range. In addition, the third radiating element arranged under the first dipole radiating element serves as a resonant cavity. As a result, the phase of the reflection coefficient of the third radiating element is at a zero-degree phase relative to the first dipole radiating element, which enables the MSS structure to radiate in phase through the region of the arm of the first dipole radiating element. Due to the in-phase radiation from the MSS structure, the third radiating element or the second radiating element produces a narrower beam. Therefore, the directivity and gain of the multi-band antenna device are enhanced by the narrower beam.

[0019] In an eighth possible implementation of the seventh implementation of the first aspect, the MSS structure includes patches of different sizes in different regions within the arms of the first dipole radiating element.

[0020] Patches of different sizes are optimized to increase the gain and directivity of a multi-band antenna device in a wide frequency range of 2.4 gigahertz (GHz) to 70 GHz by arranging the MSS structure in different areas, including: (i) an area within an arm of a first dipole radiating element, and (ii) an area between a third radiating element, the first dipole radiating element, and the second radiating element.

[0021] According to a second aspect, a method for manufacturing a multi-band antenna device is provided. The method includes arranging a metasurface superstrate (MSS) structure in a region within an arm of a first dipole radiating element above a second radiating element. The first dipole radiating element is used to operate in a first frequency band and is arranged on an upper plane of a support structure at a first distance from a reflector. The second radiating element is used to operate in a second frequency band and is arranged on a lower plane of the support structure at a second distance from the reflector. The second distance is less than the first distance, and the second frequency band is higher than the first frequency band.

[0022] The method for manufacturing a multi-band antenna device increases the directivity and gain of the second radiating element without reducing the performance parameters such as the gain, radiation pattern, bandwidth, etc. of the first dipole radiating element. The multi-band antenna device effectively utilizes the area between the first dipole radiating element and the second radiating element. In addition, since the MSS structure is arranged in the area within the arm of the first dipole radiating element, the performance parameters of the first dipole radiating element are not reduced. The MSS structure can be arranged on the top and bottom sides of the multi-band antenna device in a multi-layer form without affecting the weight or structure of the multi-band antenna device. The MSS structure increases the directivity and gain of the multi-band antenna device and enables the multi-band antenna device to work in multiple frequency bands. The design parameters of the multi-band antenna device, such as inter-band isolation, sidelobe level, return loss, and intra-column coupling, are improved by tuning the length, width, height, and gap between the unit cells of the MSS structure. The impedance of the surface of the MSS structure is also optimized by tuning the length, width, height, and gap between the unit cells of the MSS structure. The multi-band antenna device having the MSS structure has advantages due to its compact size. The multi-band antenna device is cost-effective.

[0023] The technical problem in the prior art is solved, wherein the technical problem relates to increasing the directivity and gain of a multi-band antenna device without degrading the performance of the first dipole radiating element.

[0024] Therefore, unlike the prior art, according to the multi-band antenna device and the method for manufacturing the multi-band antenna device provided in the present disclosure, the MSS structure is arranged in the area within the arm of the first dipole radiating element, thereby increasing the directivity of the second radiating element without reducing the performance parameters such as gain, radiation pattern, bandwidth, etc. of the first dipole radiating element. The performance parameters of the first dipole radiating element are not reduced due to the placement of the MSS structure. The multi-band antenna device increases the directivity and gain of the multi-band antenna device and enables the multi-band antenna device to operate within a wide frequency band range. The multi-band antenna device is cost-effective and easy to implement.

[0025] These and other aspects of the disclosure will be apparent from one or more of the embodiments described below. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Embodiments of the present disclosure will now be described by way of example only with reference to the following drawings, in which:

[0027] Figure 1 is a schematic diagram of a multi-band antenna device according to an embodiment of the present disclosure;

[0028] Figure 2 According to the embodiment of the present disclosure Figure 1 A schematic diagram of a first dipole radiating element of a multi-band antenna device;

[0029] Figure 3 is a schematic diagram of a multi-band environment of a multi-band antenna device according to an embodiment of the present disclosure;

[0030] Figure 4A The embodiment according to the present disclosure is shown Figure 1 An exemplary polar curve of s-parameters of a multi-band antenna device;

[0031] Figure 4B According to the embodiment of the present disclosure Figure 1 An exemplary rectangular coordinate diagram of s-parameters of a multi-band antenna device;

[0032] Figure 4C According to the embodiment of the present disclosure Figure 1 A graphical illustration of an exemplary gain plot of a multi-band antenna arrangement;

[0033] Figure 4D According to the embodiment of the present disclosure Figure 1 A graphical illustration of exemplary radiation patterns at different frequencies for a multi-band antenna device;

[0034] Figure 5 is a flow chart of a method for manufacturing a multi-band antenna device according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0035] Embodiments of the present disclosure provide a multi-band antenna device and a method for manufacturing the multi-band antenna device to achieve high directivity and high gain.

[0036] In order to make the solutions of the present disclosure more easily understood by those skilled in the art, the following embodiments of the present disclosure are described in conjunction with the accompanying drawings.

[0037] The terms "first", "second", "third" and "fourth" (if any) in the specification, claims and the above-mentioned drawings of the present disclosure are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or order. It should be understood that the terms used in this way are interchangeable where appropriate, so that the embodiments of the present disclosure described herein can, for example, be implemented in sequences other than the sequences shown or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to the steps or units explicitly listed, but may include other steps or units that are not explicitly listed or inherent to such a process, method, product or device.

[0038] Figure 1 1 is a schematic diagram of a multi-band antenna device 100 according to an embodiment of the present disclosure. The multi-band antenna device 100 includes a first dipole radiating element 104, a second radiating element 106, a metasurface superstrate (MSS) structure 108, a reflector 110, a support structure 112, and a third radiating element 114. The first dipole radiating element 104 is used to operate in a first frequency band and is arranged on an upper plane of the support structure 112 at a first distance from the reflector 110. For example, the first distance may be a quarter wavelength (e.g., about 80 mm) of the center frequency of the first frequency band. The second radiating element 106 is used to operate in a second frequency band. The second radiating element 106 is arranged on a lower plane of the support structure 112 at a second distance from the reflector 110. For example, the second distance may be a quarter wavelength (e.g., about 40 mm) of the center frequency of the second frequency band. The second distance is less than the first distance, and the second frequency band is higher than the first frequency band. For example, the first frequency band corresponds to a low frequency band (e.g., 618 MHz to 960 MHz), and the second frequency band corresponds to a high frequency band (e.g., 2.3 GHz to 2.69 GHz). The MSS structure 108 is arranged in a region within the arm of the first dipole radiating element 104. The MSS structure 108 is used to enhance the performance of the second radiating element 106.

[0039] The multi-band antenna device 100 may include a radome 102 that protects the multi-band antenna device 100 from adverse weather conditions. The MSS structure 108 increases the directivity and gain of the multi-band antenna device 100 without reducing the performance parameters of the first dipole radiating element 104, such as gain, radiation pattern, bandwidth, etc.

[0040] Directivity is a measure of the density of the radiation pattern of the multi-band antenna device 100 in a specific direction. The gain of the multi-band antenna device 100 indicates the strength of the signal that the multi-band antenna device 100 can send or receive in a specified direction. The multi-band antenna device 100 has a bandwidth indicating the frequency range in which the multi-band antenna device 100 operates efficiently. The multi-band antenna device 100 has a radiation pattern indicating the reception and transmission characteristics of the multi-band antenna device 100 in different directions. The multi-band antenna device 100 has a compact design and is highly cost-effective. The MSS structure 108 arranged in the area within the arm of the first dipole radiating element 104 increases the directivity of the second radiating element 106 without reducing the performance parameters (i.e., gain, radiation pattern, bandwidth, etc.) of the first dipole radiating element 104. In addition, the multi-band antenna device 100 effectively utilizes the area between the first dipole radiating element 104 and the second radiating element 106. The first dipole radiating element 104 may be a low-band radiator. The first dipole radiating element 104 may operate in a lower frequency band (e.g., 618 MHz to 960 MHz). The second radiating element 106 may be a high frequency band radiator. The second radiating element 106 may operate in a higher frequency band (e.g., 2.3 GHz to 2.69 GHz).

[0041] According to the first embodiment, the MSS structure 108 is arranged on the upper plane of the support structure 112. The arrangement of the MSS structure 108 on the upper plane utilizes the area of ​​the arm of the first dipole radiating element 104 and the area between the first dipole radiating element 104 and the second radiating element 106 to improve the performance of the multi-band antenna device 100.

[0042] According to the second embodiment, the MSS structure 108 includes a square metal patch. The MSS structure 108 may optionally include a cross-shaped metal patch. The shape of the metal patch may be changed to achieve enhanced performance of the multi-band antenna device 100. The metal patch of the MSS structure 108 is arranged in the region of the arm of the first dipole radiating element 104 to improve the performance of the multi-band antenna device 100.

[0043] According to the third embodiment, the MSS structure 108 includes a plurality of layers. The MSS structure 108 optionally includes a layer disposed on an upper surface of an upper plane of the support structure 112. The MSS structure 108 optionally includes a layer disposed on a lower surface of a lower plane of the support structure 112.

[0044] According to the fourth embodiment, the MSS structure 108 includes patches of different sizes in different regions within the arm of the first dipole radiating element 104. The optimization of the patches of different sizes of the MSS structure 108 can provide a multi-band environment for the multi-band antenna device 100. The patches of different sizes are optimized by arranging the MSS structure 108 in (i) the region within the arm of the first dipole radiating element 104 and (ii) the region between the third radiating element 114, the first dipole radiating element 104, and the second radiating element 106 to increase the gain and directivity of the multi-band antenna device 100 in a wide frequency band range from low frequency to high frequency (i.e., from 2.4 gigahertz (GHz) to 70 GHz).

[0045] Figure 2 According to the embodiment of the present disclosure Figure 1 Schematic diagram of a first dipole radiating element 104 of a multi-band antenna device 100; the multi-band antenna device 100 includes a metasurface superstrate (MSS) structure 108 arranged in a region within an arm of the first dipole radiating element 104. The MSS structure 108 includes one or more unit cells 202A to 202N. Each unit cell is adjustable in terms of length 204, width 206, and gap 208 between each unit cell. In one embodiment, design parameters of the multi-band antenna device 100, such as inter-band isolation, sidelobe level, return loss, and intra-column coupling, are improved by adjusting the length 204, width 206, and gap 208 between each unit cell of the MSS structure 108. In one embodiment, the impedance of the surface of the MSS structure 108 is optimized by adjusting the length 204, width 206, and gap 208 between each unit cell of the MSS structure 108. In one embodiment, the directivity and gain of the multi-band antenna device 100 are increased by adjusting the number of rows and columns of one or more unit cells 202A to 202N in the MSS structure 108. Each of the one or more unit cells 202A to 202N may include multiple layers. The one or more unit cells 202A to 202N may be arranged in an area within the arm of the first dipole radiating element 104. With this arrangement, the area in the first dipole radiating element 104 is effectively utilized to increase the directivity of the multi-band antenna device 100. In one embodiment, the one or more unit cells 202A to 202N are customized based on the operating frequency of the multi-band antenna device 100.

[0046] The sidelobe level is a parameter used to describe the level of sidelobe suppression. Sidelobes represent radiation outside the main beam sector. Return loss is defined as a number indicating the proportion of rejected radio waves to accepted radio waves arriving at the input of the multi-band antenna device 100 (as a ratio).

[0047] Figure 3 is a schematic diagram of a multi-band environment of a multi-band antenna device 300 according to an embodiment of the present disclosure. The multi-band antenna device 300 includes a second radiating element 302 and a third radiating element 304, a first MSS structure 306 and a second MSS structure 308. By arranging the first MSS structure 306 and the second MSS structure 308 in an area within the arm of the first dipole radiating element, the shape of the first MSS structure 306 and the shape of the second MSS structure 308 are optionally optimized. In one embodiment, the size of the first MSS structure 306 is different from the size of the third radiating element 304. In another embodiment, the metal patches of the first MSS structure 306 and the second MSS structure 308 are non-uniform. The first MSS structure 306 is optionally arranged in the area of ​​the arm of the first dipole radiating element, or optionally arranged in the area between the third radiating element 304, the first dipole radiating element and the second radiating element 302. In one embodiment, the second MSS structure 308 is arranged in a region in an arm of the first dipole radiating element, or in a region between the third radiating element 304, the first dipole radiating element, and the second radiating element 302. By arranging the second radiating element 302 on one side of the first dipole radiating element and the third radiating element 304 on the other side of the first dipole radiating element, the arrangement of the second radiating element 302 and the third radiating element 304 is optionally optimized. Optimizing (i) the size of the first MSS structure 306 and the second MSS structure 308, (ii) the shape of the first MSS structure 306 and the shape of the second MSS structure 308, and (iii) the arrangement of the second radiating element 302 and the third radiating element 304 provides a multi-band environment for the multi-band antenna device 300, so that the multi-band antenna device 300 can operate in a wide frequency band range.

[0048] According to one embodiment, the third radiating element 304 is used to operate in a third frequency band and is arranged at a third distance from the reflector. For example, the third distance may be a quarter wavelength (e.g., about 25 mm) of the center frequency of the third frequency band. The third distance may be less than the second distance, and the third frequency band may be higher than the second frequency band. For example, the second frequency band corresponds to a high frequency band (e.g., 2.3 GHz to 2.69 GHz), and the third frequency band corresponds to a citizen band (C band) (e.g., 3.3 GHz to 4.99 GHz). The third radiating element 304 may be a C band radiator. In one embodiment, the third radiating element 304 arranged under the first dipole radiating element is used as a resonant cavity. As a result, the phase of the reflection coefficient of the third radiating element 304 is at a zero-degree phase relative to the first dipole radiating element, which enables the first MSS structure 306 and the second MSS structure 308 to radiate in phase through the region of the arm of the first dipole radiating element. Due to the in-phase radiation from the first MSS structure 306 and the second MSS structure 308, the second radiating element or the third radiating element 304 produces a narrower beam. Therefore, the directivity and gain of the multi-band antenna device 300 are enhanced by a narrower beam. The reflection coefficient of any radiating element is defined as the ratio of the amplitude of the reflected wave to the amplitude of the incident wave. In one embodiment, the second radiating element 302 is used to operate in a second frequency band. The second radiating element 302 can be a high frequency band radiator.

[0049] Figure 4A The embodiment according to the present disclosure is shown Figure 1 The exemplary polar coordinate curves describe the input port S of the multi-band antenna device 100 at the first curve 402 and the second curve 404, respectively. 11 and S 21 ( Figure 4A Input port S in an exemplary polar plot 11 and S 21 The return loss is within the acceptable range of 0.1 dB to 0.2 dB, which indicates that when the MSS structure 108 is introduced in the region of the arm of the first dipole radiating element 104, there is a match between the MSS structure 108 and the first dipole radiating element 104. Therefore, no adjustment is required after the MSS structure 108 is introduced.

[0050] Figure 4B According to the embodiment of the present disclosure Figure 1 The exemplary rectangular coordinate graph depicts the input port S parameters of the multi-band antenna device 100 at the first curve 406, the second curve 408, and the third curve 410 of the third radiating element 114. 11 , S12 , S 22 ( Figure 4B The rectangular coordinate graph of the S-parameters describes the power transmitted between the two ports of the third radiating element 114 of the multi-band antenna device 100 on the Y-axis and the frequency on the X-axis. In an exemplary embodiment, the frequency range of the multi-band antenna device 100 is 3 GigaHertz (GHz) to 4 GigaHertz (GHz). Figure 4A An exemplary polar coordinate curve of Figure 4B The exemplary rectangular coordinate diagrams of the s-parameters are consistent with each other. The rectangular coordinate diagram of the s-parameters describes that the polarization matching of the multi-band antenna device 100 is less than 15 decibels (dB), so the input port S in the exemplary rectangular coordinate diagram 11 , S 12 , S 22 Therefore, when the MSS structure 108 is introduced into the region of the arm of the first dipole radiating element 104 , there is a match between the MSS structure 108 and the first dipole radiating element 104 .

[0051] Figure 4C According to the embodiment of the present disclosure Figure 1 414. The graphical illustration of an exemplary gain graph for a multi-band antenna device 100 is shown in FIG. 415. The graphical illustration of the exemplary gain graph depicts the gain of the multi-band antenna device 100 on the Y-axis versus the frequency on the X-axis. The graphical illustration of the exemplary gain graph depicts that if the first dipole radiating element 104 includes the MSS structure 108, as shown in the gain graph 412, the third radiating element 114 has a high gain. The graphical illustration of the exemplary gain graph depicts that if the first dipole radiating element 104 does not include the MSS structure 108, as shown in the gain graph 414, the third radiating element 114 has a low gain. The MSS structure 108 in the first dipole radiating element 104 reduces the beamwidth of the third radiating element 114, thereby increasing the gain of the third radiating element 114.

[0052] Figure 4D According to the embodiment of the present disclosure Figure 1 1 is a graphical illustration of an exemplary radiation pattern of a multi-band antenna device at different frequencies of the multi-band antenna device 100. In the multi-band antenna device 100, a radiation pattern for each operating frequency is obtained. For example, when Phi is -45 degrees, the operating frequency is 3.3 gigahertz (GHz), and the gain is 64.47 decibels (dB), a first radiation pattern 416 is output, such as Figure 4DAs shown. Phi is -45 degrees, the operating frequency is 3.4GHz, the gain is 72.49dB, and the second radiation pattern 418 is output. Phi is -45 degrees, the operating frequency is 3.5GHz, the gain is 88.92dB, and the third radiation pattern 420 is output. Phi is -45 degrees, the operating frequency is 3.6GHz, the gain is 98.99dB, and the fourth radiation pattern 422 is output. Phi is -45 degrees, the operating frequency is 3.7GHz, the gain is 69.23dB, and the fifth radiation pattern 424 is output. Phi is -45 degrees, the operating frequency is 3.8GHz, the gain is 69.23dB, and the sixth radiation pattern 426 is output. Phi is -45 degrees, the operating frequency is 3.9GHz, the gain is 55.58dB, and the seventh radiation pattern 428 is output. Phi is -45 degrees, the operating frequency is 4.0 GHz, the gain is 42.62 dB, and the output is the eighth radiation pattern 430. Phi is -45 degrees, the operating frequency is 4.1 GHz, the gain is 42.62 dB, and the output is the ninth radiation pattern 432. Phi is -45 degrees, the operating frequency is 4.2 GHz, the gain is 40.76 dB, and the output is the tenth radiation pattern 434.

[0053] Figure 5 It is a flow chart of a method for manufacturing a multi-band antenna device according to an embodiment of the present disclosure. In step 502, a multi-band antenna device is manufactured by arranging a metasurface superstrate (MSS) structure in a region within an arm of a first dipole radiating element on top of a second radiating element, the first dipole radiating element is used to operate in a first frequency band and is arranged on an upper plane of a support structure at a first distance from a reflector, and the second radiating element is used to operate in a second frequency band and is arranged on a lower plane of the support structure at a second distance from the reflector. The second distance is less than the first distance, and the second frequency band is higher than the first frequency band.

[0054] Although the present disclosure and its advantages have been described in detail, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the disclosure as defined by the appended claims.

Claims

1. A multi-band antenna device (100, 300), characterized in that: include: A first dipole radiating element (104) is configured to operate in a first frequency band and is arranged on an upper plane of the support structure (112) at a first distance from the reflector plate (110); a second radiation element (106, 302), configured to operate in a second frequency band, and arranged on a lower plane of the support structure (112) at a second distance from the reflection plate (110), the second distance being smaller than the first distance, and the second frequency band being higher than the first frequency band; a metasurface superstrate MSS structure (108) disposed in a region within an arm of the first dipole radiating element (104), the MSS structure (108) being used to enhance the performance of the second radiating element (106, 302); wherein the MSS structure (108) comprises patches of different sizes in different regions within the arms of the first dipole radiating element (104); The multi-band antenna device (100, 300) further comprises: a third radiation element (114, 304), which is used to operate in a third frequency band and is arranged at a third distance from the reflection plate (110), wherein the third distance is smaller than the second distance, and the third frequency band is higher than the second frequency band, wherein the MSS structure (108) is further used to enhance the performance of the third radiation element (114, 304); wherein the MSS structure (108) comprises a first MSS structure (306) and a second MSS structure (308); The third radiation element (304) is arranged below the first dipole radiation element (104) to form a resonant cavity, and the phase of the reflection coefficient of the third radiation element (304) is at a zero-degree phase relative to the first dipole radiation element (104), so that the first MSS structure (306) and the second MSS structure (308) radiate in phase through the region of the arm of the first dipole radiation element (104).

2. The multi-band antenna device (100, 300) according to claim 1, characterized in that: The MSS structure (108) is arranged on the upper plane of the support structure (112).

3. The multi-band antenna device (100, 300) according to claim 1 or 2, characterized in that: The MSS structure (108) includes square-shaped metal patches.

4. The multi-band antenna device (100, 300) according to claim 1 or 2, characterized in that: The MSS structure (108) includes a cross-shaped metal patch.

5. The multi-band antenna device (100, 300) according to any one of claims 1 to 4, characterized in that: The MSS structure (108) includes a plurality of layers.

6. The multi-band antenna device (100, 300) according to claim 5, characterized in that: The MSS structure (108) includes a layer disposed on an upper surface of the upper plane of the support structure (112).

7. The multi-band antenna device (100, 300) according to claim 5, characterized in that: The MSS structure (108) includes a layer disposed on a lower surface of the upper plane of the support structure (112).

8. A method for manufacturing a multi-band antenna device (100, 300), characterized in that: include: A metasurface cover plate MSS structure (108) is arranged above a second radiating element (106, 302) in a region within an arm of a first dipole radiating element (104), wherein the first dipole radiating element (104) is used to operate in a first frequency band and is arranged on an upper plane of a support structure (112) at a first distance from a reflector (110); the second radiating element (106, 302) is used to operate in a second frequency band and is arranged on a lower plane of the support structure (112) at a second distance from the reflector (110), the second distance being less than the first distance, and the second frequency band being higher than the first frequency band; wherein the MSS structure (108) comprises patches of different sizes in different regions within the arms of the first dipole radiating element (104); The multi-band antenna device (100, 300) further comprises: a third radiation element (114, 304), which is used to operate in a third frequency band and is arranged at a third distance from the reflection plate (110), wherein the third distance is smaller than the second distance, and the third frequency band is higher than the second frequency band, wherein the MSS structure (108) is further used to enhance the performance of the third radiation element (114, 304); wherein the MSS structure (108) comprises a first MSS structure (306) and a second MSS structure (308); The third radiation element (304) is arranged below the first dipole radiation element (104) to form a resonant cavity, and the phase of the reflection coefficient of the third radiation element (304) is at a zero-degree phase relative to the first dipole radiation element (104), so that the first MSS structure (306) and the second MSS structure (308) radiate in phase through the region of the arm of the first dipole radiation element (104).

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