Gain antenna and communication device

Abstract

Disclosed in the present application are a gain antenna and a communication device. The gain antenna comprises a feed, a reflector, a dielectric director, and a metal director, wherein the feed comprises a first radiation unit and a second radiation unit which are arranged crossing each other; the dielectric director comprises a cavity structure in which the feed and the reflector are arranged, the axial direction of the cavity structure coinciding with a cross line of the feed, which cross line is formed by means of the first radiation unit and the second radiation unit being arranged crossing each other; and the metal director comprises a plurality of metal units, which are arranged on an inner surface of the cavity structure and are arranged circumferentially around the axis of the cavity structure.

Description

Gain antenna and communication equipment

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the China Patent Office on December 19, 2023, with application number 202311755880.9 and invention name “A Gain Antenna and Communication Device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the field of wireless communications, and in particular to a gain antenna and communication equipment. Background Art

[0004] With the continuous development of wireless communication products, wireless signals are becoming more and more complex. Antennas, as the signal transceiver module of wireless devices, their performance determines the quality of the equipment. Improving antenna gain and increasing device coverage distance within a limited volume is a valuable research direction.

[0005] Summary of the Invention

[0006] The embodiments of the present application disclose a gain antenna and a communication device, which improve the antenna radiation impedance and increase the antenna gain by adding a metal director and a dielectric director.

[0007] The embodiments of this application provide the following technical solutions:

[0008] A gain antenna, comprising: a feed source, a reflector, a dielectric director and a metal director;

[0009] A feed source includes a first radiation unit and a second radiation unit, wherein the first radiation unit and the second radiation unit are arranged crosswise;

[0010] The dielectric director includes a cavity structure, the feed source and the reflector are arranged inside the cavity structure, and the axial direction of the cavity structure coincides with the intersection line of the feed source; the intersection line of the feed source is the intersection line formed by the intersection of the first radiating unit and the second radiating unit; and

[0011] The metal director includes a plurality of metal units, which are arranged on the inner surface of the cavity structure and around the axis of the cavity structure. In some embodiments, the medium director is a cylindrical structure, the feed source and the reflector are arranged inside the cylindrical structure, and the axis direction of the cylindrical structure coincides with the intersection line;

[0012] The plurality of metal units of the metal guide are arranged on the inner surface of the cylindrical structure and around the axis of the cylindrical structure.

[0013] The above-mentioned gain antenna adds a metal director on the basis of the feed source and reflector, and nests a dielectric director on this basis. Specifically, the electromagnetic waves emitted by the antenna are reflected by the reflector to form a beam with strong directionality, which initially improves the antenna gain. Then, they are refracted by the metal director and the dielectric director to further form electromagnetic waves with high gain, achieving the goal of improving antenna impedance and increasing antenna gain. The dielectric director of this solution is low-cost, easy to integrate, and easy to process. It is easy to combine with products to improve product coverage distance. It solves the problems of large antenna volume and weight, high cost, and difficulty in integration with equipment and complex installation in engineering applications caused by the need to improve the performance of the antenna radiation unit.

[0014] In some embodiments, the reflector includes a first plate, a second plate, and a connecting plate. The first plate and the second plate are arranged in parallel and connected by the connecting plate. The connecting plate is perpendicular to the intersection line of the first radiating element and the second radiating element. The reflector is used to reflect electromagnetic waves emitted by the antenna to form a highly directional beam, thereby improving antenna gain.

[0015] In some embodiments, each of the metal units includes a plurality of metal plates arranged in parallel along the axis of the cylindrical structure. The uniform arrangement of the metal plates facilitates refraction of electromagnetic waves in all directions, thereby improving antenna gain.

[0016] In some embodiments, the metal plate is a long strip structure.

[0017] In some embodiments, the first radiating element and the second radiating element intersect to form an angle, wherein the angle includes a first angle, and the first angle is 85° to 95°. The angle between the first radiating element and the second radiating element can be adjusted according to actual application conditions to achieve a better gain effect.

[0018] In some embodiments, the size of the connecting plate is 2.6 cm*2.6 cm;

[0019] and / or, the dimension of the first plate along the axial direction of the medium director is 0.5 cm to 1 cm;

[0020] And / or, the size of the second plate along the axis of the medium director is 0.5 cm to 1 cm. The size of the reflective plate can be adjusted according to actual conditions to meet application requirements.

[0021] In some embodiments, the dielectric constant of the metal director is a first fixed value, and the dielectric constant of the dielectric director is a second fixed value. Using metal directors and dielectric directors with fixed dielectric constants simplifies the processing and has good material forming stability.

[0022] In some embodiments, along the axis perpendicular to the cylindrical structure, the distance between the geometric center of the feed source and the inner surface of the dielectric director is 0.2λ to 2.8λ, where λ = 1 / f, and f is the frequency of the gain antenna;

[0023] And / or, the thickness of the dielectric director is 0.29λ to 0.3λ, wherein λ=1 / f, and f is the frequency of the gain antenna.

[0024] In some embodiments, along the axis perpendicular to the cylindrical structure, the distance between the geometric center of the feed source and the outer surface of the dielectric director is 0.49λ to 3.1λ, where λ = 1 / f, and f is the frequency of the gain antenna.

[0025] In some embodiments, the cross-sectional shape of the medium director is circular.

[0026] In some embodiments, the outer surface of the medium director is provided with a plurality of microstrip structures of different sizes.

[0027] In some embodiments, the height of the medium director along the axis is greater than the height of the feed along the axis. The position parameters and respective dimensions of the feed and medium director can be adjusted according to actual conditions to maximize the gain effect. In some embodiments, the cross-sectional shape of the medium director is square, and the cavity structure of the medium director is a cube structure.

[0028] In some embodiments, a plurality of split resonant ring structures are provided on the outer surface of the dielectric director.

[0029] In some embodiments, the spacing between two adjacent open resonant ring structures is equal. The dielectric director with a periodic structure can achieve electromagnetic wave conversion at a relatively short distance, thereby improving antenna gain, having low design cost and wide application range.

[0030] In some embodiments, the cross-sectional shape of the medium director is circular.

[0031] In some embodiments, the outer surface of the dielectric director is provided with a plurality of microstrip structures of different sizes. The microstrip structures of different sizes can achieve different phase changes for the electromagnetic waves and improve the gain through phase compensation.

[0032] In some embodiments, the media director and the metal director form a director assembly.

[0033] In some embodiments, the boost antenna includes a plurality of director assemblies, which are spaced apart along an axis perpendicular to the dielectric director. The director assemblies are stacked as independent expansion units to further increase antenna gain.

[0034] In some embodiments, along the direction perpendicular to the axis of the medium director, the distance between two adjacent director assemblies is equal. Antenna gain can be improved by controlling the distance between the director assemblies.

[0035] The embodiment of the present application further provides a communication device including the booster antenna. All the beneficial effects of the communication device including the booster antenna are not described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the conventional technology, the following briefly introduces the drawings required for use in the embodiments or the conventional technology descriptions. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, they can also obtain drawings of other embodiments based on these drawings without paying any creative work.

[0037] FIG1 is a schematic structural diagram of a booster antenna provided in an embodiment of the present application;

[0038] FIG2 is a schematic diagram of a top view of a booster antenna according to an embodiment of the present application;

[0039] FIG3 is a schematic front view of the structure of a booster antenna provided in an embodiment of the present application;

[0040] FIG4 is a schematic diagram of a partial structure of a booster antenna provided in an embodiment of the present application;

[0041] FIG5 is a schematic structural diagram of another booster antenna provided in an embodiment of the present application;

[0042] FIG6 is a schematic structural diagram of another booster antenna provided in an embodiment of the present application;

[0043] FIG7 is a schematic structural diagram of a booster antenna provided in an embodiment of the present application;

[0044] FIG8 is a schematic diagram of a top view of a booster antenna according to an embodiment of the present application;

[0045] FIG9 is a schematic structural diagram of a separate feed source provided in an embodiment of the present application;

[0046] FIG10 is a data comparison diagram of a gain antenna provided in an embodiment of the present application;

[0047] FIG11 is a data comparison diagram of a gain antenna provided in an embodiment of the present application;

[0048] FIG12 is a data comparison diagram of a gain antenna provided in an embodiment of the present application;

[0049] FIG13 is a data comparison diagram of a gain antenna provided in an embodiment of the present application.

[0050] Icons: 1. Feed source; 2. Reflector; 3. Dielectric director; 4. Metal director; 5. Director assembly; 11. First radiation unit; 12. Second radiation unit; 21. First plate; 22. Second plate; 23. Connecting plate; 31. Open resonant ring structure; 32. Microstrip structure; 41. Metal unit; 411. Metal plate. DETAILED DESCRIPTION

[0051] The following will clearly and completely describe the technical solutions in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. Among them, in the description of the embodiments of the present application, unless otherwise specified, " / " means or, for example, A / B can mean A or B; "and / or" in the text is only a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, "multiple" refers to two or more than two.

[0052] In the following, the terms "first" and "second" are used for descriptive purposes only and should not be understood to imply or suggest relative importance or implicitly indicate the number of the technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of this application, unless otherwise specified, "plurality" means two or more.

[0053] If the antenna gain is increased and the same signal coverage effect is achieved, the number of products required in the coverage area can be reduced, achieving the value of energy saving and efficiency improvement. At present, the main solutions for achieving high-gain antennas are as follows: (1) Simply relying on the stacking of antenna radiating elements. In theory, as the number of antenna radiating elements doubles, the gain can be greatly improved. However, as the number of antenna radiating elements increases, the size of the antenna will also increase, and the feeding network will become more complex. Whether it is series feeding or parallel feeding, the link loss will increase to a certain extent, affecting the antenna efficiency. (2) Adding a parabolic metal reflector under the antenna radiating element so that the electromagnetic waves emitted by the antenna radiating element are reflected by the parabolic metal reflector to form a highly directional beam and obtain higher gain. Typical examples include horn antennas or parabolic antennas. Although this type of antenna can achieve higher gain, it is large in size and is very limited in many application scenarios. (3) Utilizing the wave-particle duality of electromagnetic waves, materials with different dielectric constants are added to appropriate locations of the antenna's radiating element. By utilizing the gradual change in dielectric constant, electromagnetic waves are refracted in the materials with different dielectric constants, forming a narrow beam with high gain. However, this solution is limited by the processing technology and material forming stability. Based on the existing technology and materials, it is difficult to achieve a relatively economical industrial effect. Therefore, this type of antenna has not yet reached the conditions for large-scale mass production, and the antenna is large and expensive.

[0054] As shown in FIG1 to FIG9 , an embodiment of the present application provides a boost antenna, including:

[0055] The feed source 1 includes a first radiation unit 11 and a second radiation unit 12, wherein the first radiation unit 11 and the second radiation unit 12 are arranged crosswise;

[0056] Reflector 2;

[0057] The dielectric director 3 includes a cavity structure, the feed source 1 and the reflector 2 are placed inside the cavity structure, and the axial direction of the cavity structure coincides with the intersection line of the feed source 1; the intersection line of the feed source 1 refers to the intersection line formed by the intersection of the first radiating element 11 and the second radiating element 12;

[0058] The metal director 4 includes a plurality of metal units 41 . The plurality of metal units 41 are arranged on the inner surface of the cavity structure and around the axis of the cavity structure.

[0059] In one possible implementation, referring to FIG1 , the medium director 3 includes a cylindrical structure, the feed source 1 and the reflector 2 are placed inside the cylindrical structure, and the axial direction of the cylindrical structure coincides with the intersection line of the feed source 1;

[0060] The metal guide 4 includes a plurality of metal units 41 , which are arranged on the inner surface of the cylindrical structure and around the axis of the cylindrical structure.

[0061] The above-described gain antenna is based on a feed source 1 and a reflector 2, with a metal director 4 and a nested dielectric director 3. Specifically, the electromagnetic waves emitted by the antenna are reflected by the reflector 2 to form a highly directional beam, initially increasing the antenna gain. The beam is then refracted by the metal director 4 and the dielectric director 3, further forming a high-gain electromagnetic wave, thereby improving both antenna impedance and gain. In this embodiment, the dielectric director 3 is low-cost, easy to integrate, and convenient to manufacture, making it easy to integrate with the product and improving its coverage distance.

[0062] In one possible implementation, referring to Figures 1-4 , the first and second radiating elements 11, 12 of the feed source 1 are arranged in a cross pattern, forming a cross line. The cylindrical dielectric director 3 has a housing cavity, which houses both the feed source 1 and the reflector 2. This allows the reflected electromagnetic waves to reach the dielectric director 3 and refract, further improving the antenna gain. A metal director 4 is annularly disposed on the inner surface of the dielectric director 3 to improve the antenna's impedance.

[0063] In some embodiments, the reflector 2 includes a first plate 21 , a second plate 22 and a connecting plate 23 . The first plate 21 and the second plate 22 are arranged in parallel and connected by the connecting plate 23 . The connecting plate 23 is perpendicular to the intersection line of the first radiation unit 11 and the second radiation unit 12 .

[0064] In one possible implementation, referring to Figures 1 to 4, the connecting plate 23 of the reflector 2 is perpendicular to the cross line and is arranged below the feed source 1, so that the electromagnetic waves emitted by the feed source 1 reach the reflector 2, and are reflected to form a beam with stronger directionality, thereby improving the antenna gain.

[0065] In some embodiments, each metal unit 41 includes a plurality of metal plates 411 , and the plurality of metal plates 411 are arranged in parallel along the axis direction of the cylindrical structure.

[0066] In one possible implementation, referring to Figures 1 and 4 , the metal plates 411 are elongated (e.g., rectangular) in shape. Multiple metal plates 411 within each metal unit 41 are arranged from top to bottom on the inner surface of the dielectric director 3 in the orientation shown in Figure 1 . The uniform arrangement of the multiple metal plates 411 facilitates refraction of electromagnetic waves in all directions, thereby improving antenna gain.

[0067] In some possible embodiments, the shapes of the multiple metal plates 411 included in the metal unit 41 can be the same or different; for example, a long strip structure can be composed of multiple squares spliced ​​together, etc., and the embodiments of the present application do not limit this.

[0068] In some embodiments, the first radiation unit 11 and the second radiation unit 12 form an included angle, and the included angle includes a first included angle, and the angle of the first included angle is in the range of 85° to 95°.

[0069] In one possible implementation, referring to Figure 1 , the first radiating element 11 and the second radiating element 12 form four angles, with two opposing angles of equal magnitude, namely, two first angles and two second angles. The first angles are within the range of 85° to 95°. For example, they may be 85°, 86°, 87°, 88°, 89°, 90°, 91°, 92°, 93°, 94°, or 95°. The corresponding second angles may be 95°, 94°, 93°, 92°, 91°, 90°, 89°, 88°, 87°, 86°, or 85°. As a specific example, all four angles are 90°. The angles between the first and second radiating elements can be adjusted based on actual application to achieve optimal gain.

[0070] In some embodiments, the size of the connecting plate 23 is 2.6 cm*2.6 cm;

[0071] and / or, the dimension of the first plate 21 along the axis of the medium guide is 0.5 cm to 1 cm;

[0072] And / or, the dimension of the second plate 22 along the axial direction of the medium guide is 0.5 cm to 1 cm.

[0073] In one possible implementation, referring to FIG1 , the connecting plate 23 is square. In the orientation shown in FIG1 , the height of the first plate 21 is 0.5 cm to 1 cm, and illustratively, it can be 0.5 cm, 0.6 cm, 0.7 cm, 0.8 cm, 0.9 cm, or 1 cm. The height of the second plate 22 is 0.5 cm to 1 cm, and illustratively, it can be 0.5 cm, 0.6 cm, 0.7 cm, 0.8 cm, 0.9 cm, or 1 cm. The dimensions of the reflective plate 2 can be adjusted to meet application requirements.

[0074] In some embodiments, the dielectric constant of the metal director 4 is a first fixed value, and the dielectric constant of the dielectric director 3 is a second fixed value.

[0075] In one possible implementation, the metal director 4 is made of a metal material with a single conductivity, while the dielectric director 3 has a fixed dielectric constant. For example, the dielectric director 3 is made of polytetrafluoroethylene (PTFE), which has a dielectric constant of 1.6. This material offers advantages such as low loss, a fixed dielectric constant, low cost, good stability, and ease of processing. The dielectric director 3 in this embodiment of the present application is simple to process and features stable material formation.

[0076] In some embodiments, along the axis perpendicular to the cylindrical structure, the distance between the geometric center of the feed source 1 and the inner surface of the dielectric director 3 is 0.2λ to 2.8λ, where λ = 1 / f, and f is the frequency of the gain antenna;

[0077] and / or, the thickness of the dielectric director 3 is 0.29λ to 0.3λ, wherein λ=1 / f, and f is the frequency of the gain antenna;

[0078] and / or, the distance between the geometric center of the feed source 1 and the outer surface of the dielectric director 3 is 0.49λ to 3.1λ, where λ=1 / f, and f is the frequency of the gain antenna;

[0079] And / or, the height of the medium director 3 along the axial direction is greater than the height of the feed source 1 along the axial direction.

[0080] In one possible implementation, referring to FIG1 , the inner diameter of the medium director 3 is 0.2λ to 2.8λ, and can be, for example, 0.2λ, 0.4λ, 0.6λ, 0.8λ, 1.0λ, 1.2λ, 1.4λ, 1.6λ, 1.8λ, 2.0λ, 2.2λ, 2.4λ, 2.6λ, or 2.8λ. The thickness of the medium director 3 is 0.29λ to 0.3λ, and can be, for example, 0.292λ, 0.294λ, 0.296λ, 0.298λ, or 0.3λ. The outer diameter of the dielectric director 3 is 0.49λ to 3.1λ. For example, it can be 0.49λ, 0.6λ, 0.8λ, 1.0λ, 1.2λ, 1.4λ, 1.6λ, 1.8λ, 2.0λ, 2.2λ, 2.4λ, 2.6λ, 2.8λ, or 3.1λ. The height of the dielectric director 3 is 0.5λ to 2.9λ. For example, it can be 0.5λ, 0.7λ, 0.9λ, 1.1λ, 1.3λ, 1.5λ, 1.7λ, 1.9λ, 2.1λ, 2.3λ, 2.5λ, 2.7λ, or 2.9λ. Here, λ = 1 / f, where f is the frequency of the gain antenna and λ is the wavelength of the gain antenna. This application demonstrates through simulation that by optimizing the specifications and distribution parameters of each component, it can achieve improved antenna gain and antenna impedance.

[0081] In some embodiments, the cross-sectional shape of the medium director 3 is square.

[0082] In one possible implementation, referring to FIG. 5 , the cross section of the medium guide 3 may be a square, and the shape of the medium guide 3 may be a cube.

[0083] In some embodiments, a plurality of split resonant ring structures 31 are provided on the outer surface of the dielectric director 3 , and the distance between any two adjacent split resonant ring structures 31 is equal.

[0084] In one possible implementation, referring to FIG5 , an embodiment of the present application provides a dielectric director 3 having a periodic structure with a square cross-section, wherein the director assembly 5 is a single element. As shown in FIG5 , split resonant ring structures 31 are placed crosswise on the outer surface of the dielectric director 3 to form a periodic dielectric director 3. As shown in FIG5 , the split resonant rings 31 are arranged in rows and columns, and the distance between the geometric centers of two adjacent split resonant ring structures 31 in the same row in the same plane can be 0.3λ, that is, the period of the split resonant ring is 0.3λ. The size of the dielectric director 3 is 2.1λ*2.1λ*2.1λ, and the vertical distance between the geometric center of the feed source 1 and the inner surface of the dielectric director 3 is 0.8λ to 0.9λ, and can be 0.82λ, 0.84λ, 0.86λ, 0.88λ, or 0.9λ, for example.

[0085] The dielectric director 3 has an equivalent relative dielectric constant close to zero within its bandwidth, and therefore its refractive index is also close to zero. According to Snell's law of refraction, spherical waves emitted by the feed source 1 are converted into plane waves after refraction by the surface of the dielectric director 3. This allows for spherical-to-plane wave conversion at relatively short distances, thereby increasing the antenna gain. This design of the dielectric director 3 is compatible with a variety of feed source types, saving the cost of repeated design iterations. Furthermore, compared to a Luneburg lens, it achieves electromagnetic wave conversion using a printed circuit board (PCB) surface treatment process. Materials with dielectric constants of 2.2 to 3.5 can be selected, with examples ranging from 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3.0, 3.1, 3.2, 3.3, 3.4, and 3.5. This dielectric director 3 offers the advantages of simple processing and low cost. This solution can be used as a complete antenna unit and can be used on home wireless devices such as routers.

[0086] In some embodiments, the cross-sectional shape of the medium director 3 is circular.

[0087] In one possible implementation, referring to FIG1 , the cross-section of the medium guide 3 can be circular. In this case, the inner diameter of the medium guide 3 is 0.2λ to 0.25λ, and can be, for example, 0.2λ, 0.21λ, 0.22λ, 0.23λ, 0.24λ, or 0.25λ. The outer diameter of the medium guide 3 is 0.49λ to 0.55λ, and can be, for example, 0.49λ, 0.50λ, 0.51λ, 0.52λ, 0.53λ, 0.54λ, or 0.55λ. The thickness of the medium guide 3 is 0.29λ to 0.3λ, and can be, for example, 0.292λ, 0.294λ, 0.296λ, 0.298λ, or 0.3λ. The height of the dielectric director 3 is 0.5λ to 0.75λ, and can be 0.5λ, 0.55λ, 0.6λ, 0.65λ, 0.7λ, or 0.75λ, where λ=1 / f, f is the frequency of the booster antenna, and λ is the wavelength of the booster antenna.

[0088] In some embodiments, the outer surface of the dielectric director 3 is provided with multiple microstrip structures 32 of different sizes. In one possible implementation, referring to FIG6 , an embodiment of the present application provides a dielectric director 3 having a circular cross-section, and the director assembly 5 is a single element. Specifically, as shown in FIG3 , the outer surface of the dielectric director 3 is provided with multiple microstrip structures 32 of different sizes and shapes, thereby forming a dielectric director 3 with a non-periodic structure. The spacing between two adjacent microstrip structures 32 can be 0.26λ, the radius of the dielectric director 3 is 2.8λ, the height of the dielectric director 3 is 2.9λ, and the vertical distance between the geometric center of the feed source 1 and the inner surface of the dielectric director 3 is 2.8λ.

[0089] Microstrip structures 32 of varying sizes can achieve different phase shifts for electromagnetic waves. Based on the phase differences generated by different paths reaching the dielectric director 3, a phase compensation formula can be calculated to determine the dimensions of the microstrip structure 32 at each location. When phase compensation is used to achieve the same phase for each electromagnetic wave, the spherical wave emitted by the feed source 1 is converted into a plane wave, resulting in increased gain.

[0090] This solution primarily achieves gain improvement through phase compensation. The first radiating element 11 and the second radiating element 12 of the feed source 1 are arranged crosswise, dividing the space between the feed source 1 and the dielectric director 3 into four regions. This also divides the aperiodic dielectric director 3 into four regions, enabling beam control in four directions. The four regions overlap to form a 360° circular surface, and the interior of the dielectric director 3 is also a circular surface. Both utilize a conformal design, which reduces their size and increases design freedom. Materials with dielectric constants of 2.2 to 3.5 can be selected, with examples including 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3.0, 3.1, 3.2, 3.3, 3.4, and 3.5. The dielectric director 3 also utilizes a printed circuit board (PCB) surface treatment process to achieve antenna gain improvement, offering the advantages of simple processing and low cost. This solution can be used as a complete antenna unit and can be used on home wireless devices such as routers.

[0091] In some embodiments, the dielectric director 3 and the metal director 4 form a director assembly 5, and the booster antenna includes a plurality of director assemblies 5, which are spaced apart along an axis perpendicular to the dielectric director 3;

[0092] Along the axial direction perpendicular to the medium director 3 , the distance between any two adjacent director assemblies 5 is equal.

[0093] In one possible implementation, referring to Figures 7-8, the dielectric director 3 and the metal director 4 are combined into a partial whole to form a director assembly 5. In Figure 7, there are two director assemblies 5, and the height of the second director assembly 5 is greater than the height of the first director assembly 5, which can reflect the beam that passes through the first director assembly 5 and the beam that is not reflected by the first director assembly 5. When the antenna size is unconstrained, in principle, multiple director assemblies 5 can be placed at equidistant positions with a spacing distance of 0.15λ according to actual needs. It can also be arranged at unequal spacings, which is not limited in the embodiments of the present application. In other words, the director assembly 5 can be used in a modular design and can be used as a separate expansion unit to meet the requirements of antenna size. As the number of director assemblies 5 increases, the antenna gain can be further improved.

[0094] The embodiment of the present application further provides a communication device including the booster antenna described above. Since the communication device includes all the technical features of the booster antenna, the communication device also includes all the beneficial effects of the booster antenna, which will not be described in detail here.

[0095] In order to further illustrate the present application, a gain antenna provided by the present application is described in detail below in combination with specific embodiments.

[0096] FIG1 provides a gain antenna with a single director assembly 5. As shown in FIG1 , this embodiment can effectively improve the antenna gain compared with the single feed source 1 shown in FIG9 . For data comparison, refer to FIG10 :

[0097] Taking the 5G frequency band as an example, when using feed source 1 alone, the gain at m2 is 0.6dBi. With the addition of a single director assembly 5 (including metal director 4 and dielectric director 3), the gain at m4 is 1.7dBi, a gain improvement of 2.3dBi. This solution can be used as a complete antenna unit and can be used in home wireless devices such as routers.

[0098] FIG7 provides a gain antenna with two director assemblies 5. Compared with the embodiment shown in FIG1 , the embodiment shown in FIG7 has two director assemblies 5, which can further improve the antenna gain. For data comparison, refer to FIG11 :

[0099] Taking the 5G frequency band as an example, after adding a single director component 5, the gain at m4 is 1.7dBi. After adding two director components 5, the gain at m2 is 3.89dBi, and the gain is increased by 2.19dBi.

[0100] FIG5 provides a medium director 3 with a periodic structure having a square cross section. As shown in FIG5 , the director assembly 5 is single. The data comparison before and after adding the medium director 3 with a periodic structure is shown in FIG12 :

[0101] Taking the 5G frequency band as an example, before adding the periodic structure dielectric director 3, the gain at m1 is 1.9dBi. After adding the periodic structure dielectric director 3, the gain at m2 is 6.96dBi, and the gain is increased by 5.06dBi.

[0102] FIG6 provides a medium director 3 with a non-periodic structure having a circular cross section. As shown in FIG6 , the director assembly 5 is single. The data comparison before and after adding the medium director 3 with a non-periodic structure is shown in FIG13 :

[0103] Taking the 5G frequency band as an example, before adding the non-periodic dielectric director 3, the gain at m3 is 1.99dBi. After adding the non-periodic dielectric director 3, the gain at m4 is 6.07dBi, and the gain is increased by 4.08dBi.

[0104] In summary, on the basis of a single feed source 1, adding a metal director 4 and a dielectric director 3 can effectively improve the antenna impedance and increase the antenna gain; by designing a periodic structure or a non-periodic structure of the dielectric director 3, the antenna gain can be further improved.

[0105] Obviously, those skilled in the art may make various changes and modifications to this application without departing from the spirit and scope of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalents, this application is intended to include these modifications and variations.

Claims

1. A boost antenna, comprising: Feed source, reflector, dielectric director and metal director; The feed source comprises a first radiation unit and a second radiation unit, wherein the first radiation unit and the second radiation unit are arranged crosswise; The medium director comprises a cavity structure, the feed source and the reflector are arranged inside the cavity structure, and the axial direction of the cavity structure coincides with the intersection line of the feed source; the intersection line of the feed source is the intersection line formed by the intersection of the first radiation unit and the second radiation unit; as well as The metal director includes a plurality of metal units, which are arranged on the inner surface of the cavity structure and around the axis of the cavity structure.

2. The booster antenna according to claim 1, wherein: The cavity structure of the medium director is a cylindrical structure, the feed source and the reflector are arranged inside the cylindrical structure, and the axial direction of the cylindrical structure coincides with the intersection line; as well as The plurality of metal units of the metal director are arranged on the inner surface of the cylindrical structure and around the axis of the cylindrical structure.

3. The booster antenna according to claim 2, wherein: Each of the metal units includes a plurality of metal plates, and the plurality of metal plates are arranged in parallel along the axial direction of the cylindrical structure.

4. The booster antenna according to claim 3, wherein: The metal plate is a long strip structure.

5. The booster antenna according to claim 2, wherein: The first radiation unit and the second radiation unit intersect to form an angle, where the angle includes a first angle, and the first angle is 85° to 95°.

6. The booster antenna according to claim 1 or 2, wherein: The dielectric constant of the metal director is a first fixed value, and the dielectric constant of the dielectric director is a second fixed value.

7. The booster antenna according to claim 2, wherein: The thickness of the medium director along the axial direction perpendicular to the cylindrical structure is 0.29λ to 0.3λ, wherein λ=1 / f, and f is the frequency of the gain antenna.

8. The booster antenna according to claim 7, wherein: Along the axial direction perpendicular to the cylindrical structure, the distance between the geometric center of the feed source and the inner surface of the dielectric director is 0.2λ to 2.8λ, wherein λ=1 / f, and f is the frequency of the gain antenna.

9. The method according to claim 7, wherein: Along the axial direction perpendicular to the cylindrical structure, the distance between the geometric center of the feed source and the outer surface of the dielectric director is 0.49λ~3.1λ, where λ=1 / f, and f is the frequency of the gain antenna.

10. The booster antenna according to claim 1 or 2, characterized in that: The cross-sectional shape of the medium director is circular.

11. The booster antenna according to claim 1 or 2, characterized in that: The outer surface of the medium director is provided with a plurality of microstrip structures of different sizes.

12. The booster antenna according to claim 1, wherein: The cross-sectional shape of the medium director is a square, and the cavity structure of the medium director is a cube structure.

13. The booster antenna according to claim 12, wherein: The outer surface of the dielectric director is provided with a plurality of open resonant ring structures.

14. The booster antenna according to claim 13, wherein: The distances between two adjacent split resonant ring structures are equal.

15. The booster antenna according to any one of claims 1 to 14, wherein: The height of the medium guide along the axis direction is greater than the height of the feed source along the axis direction.

16. The booster antenna according to any one of claims 1 to 14, wherein: The medium director and the metal director form a director assembly.

17. The booster antenna according to claim 16, wherein: The booster antenna includes a plurality of the director assemblies, and the plurality of director assemblies are arranged at intervals along an axial direction perpendicular to the dielectric director.

18. The booster antenna according to claim 16, wherein: Along the axial direction perpendicular to the medium director, the distances between two adjacent director assemblies are equal.

19. A communication device, wherein: Comprising the gain antenna as described in any one of claims 1-18.

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