Gain antenna and communication equipment

Abstract

The invention discloses a gain antenna and communication equipment. The gain antenna comprises a feed source, the feed source comprises a first radiation unit and a second radiation unit, and the first radiation unit and the second radiation unit are arranged in a crossed manner; a reflecting plate; the dielectric director comprises a cylindrical structure, the feed source and the reflecting plate are arranged in the cylindrical structure, and the axis direction of the cylindrical structure coincides with the intersecting line of the feed source; and the metal director comprises a plurality of metal units, and the plurality of metal units are arranged on the inner surface of the cylindrical structure and annularly arranged around the axis of the cylindrical structure.

Description

Technical Field

[0001] This application relates to the field of wireless communication, and particularly to a gain antenna and a communication device. Background Art

[0002] With the continuous development of wireless communication products, wireless signals are becoming increasingly complex. As the signal transceiver module of wireless devices, the performance of the antenna determines the quality of the device. Improving the antenna gain and the device coverage distance within a limited volume is a valuable research direction.

[0003] The increase in antenna gain can reduce the number of products in the coverage area, achieving the value of energy conservation and efficiency improvement. The current solutions for realizing high-gain antennas mainly include the following: (1) Simply relying on the stacking of antenna radiation elements. In theory, as the number of antenna elements doubles, the gain can be greatly improved. However, as the number of elements increases, the size of the antenna will also increase proportionally, and the feeding network will become more complex. Whether it is series feeding or parallel feeding, it will increase the link loss to a certain extent and affect the antenna efficiency. (2) Adding a parabolic metal reflector under the antenna radiation element to reflect the emitted electromagnetic waves through the parabola, forming a highly directional beam and obtaining a high gain. Although typical horn antennas or parabolic antennas can obtain a high gain, their large volume is very limited in many application scenarios. (3) Utilizing the wave-particle duality of electromagnetic waves, adding some materials with different dielectric constants at appropriate positions of the element. By using the gradual change of the dielectric constant of the material, the electromagnetic waves are refracted in the materials with different dielectric constants, forming an electromagnetic wave with a narrow beam and high gain. Due to the limitations of process processing and the stability of material forming, it is difficult to achieve a relatively economical industrialization effect based on the existing processes and materials, resulting in the antenna not meeting the conditions for large-scale mass production, and the antenna has a large volume and high cost. Summary of the Invention

[0004] This application discloses a gain antenna and a communication device. By adding a metal director and a dielectric director, the radiation impedance of the antenna is improved, the antenna gain is increased, and the problems that the antenna radiation unit has a large volume, large weight, high cost, is not conducive to integration with the device, and is complex to install in engineering applications due to the need to improve performance are solved.

[0005] To achieve the above object, this application provides the following technical solutions:

[0006] A gain antenna, comprising:

[0007] A feed source, including a first radiation unit and a second radiation unit, the first radiation unit and the second radiation unit being cross-set;

[0008] A reflector;

[0009] A medium director, the medium director comprises 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 of the feed source;

[0010] The metal director comprises a plurality of metal units, wherein the plurality of metal units are arranged on the inner surface of the cylindrical structure and are arranged in a ring shape around the axis of the cylindrical structure.

[0011] The above-mentioned gain antenna adds a metal director on the basis of the feed source and the reflector, and embeds 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 directivity, 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 has low cost, is easy to integrate, and is convenient to process. It is easy to combine with products to improve the product coverage distance.

[0012] 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, and the connecting plate is perpendicular to the intersection line of the first radiation unit and the second radiation unit. The reflector is used to reflect the electromagnetic waves emitted by the antenna to form a beam with strong directivity and improve the antenna gain.

[0013] In some embodiments, each of the metal units includes a plurality of metal plates, and the plurality of metal plates are arranged in parallel along the axis direction of the cylindrical structure. The uniform arrangement of the plurality of metal plates is conducive to refracting electromagnetic waves in all directions and improving the antenna gain.

[0014] In some embodiments, the first radiation unit and the second radiation unit form an angle, the angle includes a first angle, and the first angle is 85° to 95°. The angle between the first radiation unit and the second radiation unit can be adjusted according to actual application conditions to achieve a better gain effect.

[0015] In some embodiments, the size of the connecting plate is 2.6 cm*2.6 cm;

[0016] and / or, the dimension of the first plate along the axial direction of the medium director is 0.5 cm to 1 cm;

[0017] And / or, the size of the second plate along the axis direction of the medium director is 0.5 cm to 1 cm. The size of the reflector plate can be adjusted according to actual conditions to meet application requirements.

[0018] 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. By using a metal director and a dielectric director with fixed dielectric constants, the processing technology is simple and the material forming stability is good.

[0019] In some embodiments, along the direction perpendicular to the axis of 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;

[0020] and / or, the thickness of the dielectric director is 0.29λ to 0.3λ, where λ = 1 / f and f is the frequency of the gain antenna;

[0021] and / or, 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;

[0022] and / or, the height of the dielectric director along the axis direction is greater than the height of the feed source along the axis direction. The position parameters and respective size parameters of the feed source and the dielectric director can be adjusted according to the actual situation to maximize the gain effect.

[0023] In some embodiments, the cross-sectional shape of the dielectric director is a square.

[0024] In some embodiments, a plurality of split ring resonator structures are provided on the outer surface of the dielectric director.

[0025] In some embodiments, the spacing between any two adjacent split ring resonator structures is equal. The dielectric director with a periodic structure can achieve the conversion of electromagnetic waves at a smaller distance, improve the antenna gain, have a low design cost, and a wide application range.

[0026] In some embodiments, the cross-sectional shape of the dielectric director is a circle.

[0027] In some embodiments, a plurality of microstrip structures with different sizes are provided on the outer surface of the dielectric director. The microstrip structures with different sizes can achieve different phase changes for electromagnetic waves and improve the gain through phase compensation.

[0028] In some embodiments, the dielectric director and the metal director form a director assembly, and the gain antenna includes a plurality of the director assemblies. The plurality of director assemblies are arranged at intervals along the direction perpendicular to the axis of the dielectric director. Using the director assembly as an independent expansion unit for superposition can further improve the antenna gain.

[0029] In some embodiments, along the direction perpendicular to the axis of the dielectric director, the spacing between any two adjacent director components is equal. By controlling the spacing between the director components, an increase in antenna gain can be achieved.

[0030] The present application also provides a communication device including the gain antenna. The communication device includes all the beneficial effects of the gain antenna, which will not be elaborated herein. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic structural diagram of a gain antenna provided by the present application;

[0032] Figure 2 is a top-view structural diagram of a gain antenna provided by the present application;

[0033] Figure 3 is a front-view structural diagram of a gain antenna provided by the present application;

[0034] Figure 4 is a partial structural diagram of a gain antenna provided by the present application;

[0035] Figure 5 is a schematic structural diagram of another gain antenna provided by the present application;

[0036] Figure 6 is a schematic structural diagram of another gain antenna provided by the present application;

[0037] Figure 7 is a schematic structural diagram of a gain antenna provided by the present application;

[0038] Figure 8 is a top-view structural diagram of a gain antenna provided by the present application;

[0039] Figure 9 is a schematic structural diagram of a single feed provided by the present application;

[0040] Figure 10 is a data comparison diagram of a gain antenna provided by the present application;

[0041] Figure 11 is a data comparison diagram of a gain antenna provided by the present application;

[0042] Figure 12 is a data comparison diagram of a gain antenna provided by the present application;

[0043] Figure 13 is a data comparison diagram of a gain antenna provided by the present application.

[0044] Icons: 1. Feed; 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. Split ring resonator structure; 32. Microstrip structure; 41. Metal unit; 411. Metal plate. Detailed implementation manners

[0045] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application. Among them, in the description of the embodiments of the present application, unless otherwise specified, " / " means "or", for example, A / B may mean A or B; "and / or" in the text is only a description of the relationship between associated objects, indicating that there can be three relationships, for example, A and / or B may mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of the present application, "a plurality of" means two or more than two.

[0046] Hereinafter, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as implying or suggesting relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more than two.

[0047] As Figures 1 to 9 shown, in a first aspect, an embodiment of the present application provides a gain antenna, including:

[0048] A feed 1, including a first radiation unit 11 and a second radiation unit 12, and the first radiation unit 11 and the second radiation unit 12 are arranged crosswise;

[0049] A reflector 2;

[0050] A dielectric director 3, the dielectric director 3 includes a cylindrical structure, the feed 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 1;

[0051] A metal director 4, including a plurality of metal units 41, and the plurality of metal units 41 are arranged on the inner surface of the cylindrical structure and are arranged annularly around the axis of the cylindrical structure.

[0052] The above-mentioned gain antenna adds a metal director 4 on the basis of the feed source 1 and the reflector 2, and embeds a dielectric director 3 on this basis. Specifically, the electromagnetic wave emitted by the antenna is reflected by the reflector 2 to form a beam with strong directivity, which initially improves the antenna gain, and then refracts through the metal director 4 and the dielectric director 3 to further form a high-gain electromagnetic wave, achieving the goal of improving the antenna impedance and increasing the antenna gain. The dielectric director 3 of this solution is low in cost, easy to integrate, convenient to process, and easy to combine with the product to improve the product coverage distance.

[0053] In one possible implementation, refer to Figures 1 - 4 The first radiation unit 11 and the second radiation unit 12 of the feed source 1 are arranged in a cross shape, and the first radiation unit 11 and the second radiation unit 12 form a cross line. The cylindrical dielectric director 3 has a receiving cavity, and the feed source 1 and the reflector 2 are both accommodated in the receiving cavity, so that the reflected electromagnetic wave reaches the dielectric director 3 to form refraction, further improving the antenna gain. The metal director 4 is arranged in an annular shape on the inner surface of the dielectric director 3 to improve the impedance of the antenna.

[0054] 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 .

[0055] In one possible implementation, refer to Figures 1 - 4 The connecting plate 23 of the reflector 2 is arranged perpendicular to the cross line 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 strong directivity, thereby improving the antenna gain.

[0056] 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 axial direction of the cylindrical structure.

[0057] In one possible implementation, refer to Figure 1 and Figure 4 The metal plate 411 is a long strip structure. Figure 1 In the shown orientation, multiple metal plates 411 in each metal unit 41 are arranged from top to bottom on the inner surface of the dielectric director 3. The uniform arrangement of multiple metal plates 411 is conducive to refracting electromagnetic waves in all directions and improving antenna gain.

[0058] In some embodiments, the first radiation unit 11 and the second radiation unit 12 form an angle, and the angle includes a first angle, and the first angle is 85° to 95°.

[0059] In one possible implementation, refer to Figure 1, the first radiation unit 11 and the second radiation unit 12 form four angles, and the angles of two opposite angles in the four angles are equal, that is, they include two first angles and two second angles, and the angle of the first angle is 85° to 95°. For example, it can be 85°, 86°, 87°, 88°, 89°, 90°, 91°, 92°, 93°, 94°, 95°. The corresponding second angle can be 95°, 94°, 93°, 92°, 91°, 90°, 89°, 88°, 87°, 86°, 85°. As a special example, the four angles are all 90°. The angle between the first radiation unit and the second radiation unit can be adjusted according to the actual application to achieve a better gain effect.

[0060] In some embodiments, the size of the connecting plate 23 is 2.6 cm*2.6 cm;

[0061] and / or, the dimension of the first plate along the axial direction of the medium director is 0.5 cm to 1 cm;

[0062] And / or, a dimension of the second plate along the axial direction of the medium director is 0.5 cm to 1 cm.

[0063] In one possible implementation, refer to Figure 1 The connecting plate 23 is square in shape. Figure 1 In the orientation shown, the height of the first plate 21 is 0.5 cm to 1 cm, and 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 can be 0.5 cm, 0.6 cm, 0.7 cm, 0.8 cm, 0.9 cm, or 1 cm. The size of the reflective plate can be adjusted according to actual conditions to meet application requirements.

[0064] 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.

[0065] In one possible implementation, the metal director 4 is a metal material with a single conductivity, and the dielectric director 3 has a fixed dielectric constant. Exemplarily, the dielectric director 3 is made of polytetrafluoroethylene with a dielectric constant of 1.6, which has the advantages of low loss, fixed dielectric constant, low cost, good stability and easy processing. The dielectric director 3 of the embodiment of the present application has a simple processing technology and stable material molding.

[0066] In some embodiments, along the axis direction 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;

[0067] And / or, the thickness of the dielectric director 3 is 0.29λ to 0.3λ, where λ = 1 / f and f is the frequency of the gain antenna;

[0068] And / or, the distance between the geometric center of the feed 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;

[0069] And / or, the height of the dielectric director 3 in the axial direction is greater than the height of the feed 1 in the axial direction.

[0070] In a possible implementation manner, referring to Figure 1 , the inner diameter of the dielectric director 3 is 0.2λ to 2.8λ. Exemplarily, it can be 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, 2.8λ. The thickness of the dielectric director 3 is 0.29λ to 0.3λ. Exemplarily, it can be 0.292λ, 0.294λ, 0.296λ, 0.298λ, 0.3λ. The outer diameter of the dielectric director 3 is 0.49λ to 3.1λ. Exemplarily, 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, 3.1λ. The height of the dielectric director 3 is 0.5λ to 2.9λ. Exemplarily, 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, 2.9λ. Where λ = 1 / f, f is the frequency of the gain antenna, and λ is the wavelength of the gain antenna. Through simulation and demonstration, the present application optimizes the specifications and distribution parameters of each component, and can achieve an increase in antenna gain and an improvement in antenna impedance.

[0071] In some embodiments, the cross-sectional shape of the dielectric director 3 is a square.

[0072] In a possible implementation manner, referring to Figure 5 , the cross-section of the dielectric director 3 can be a square.

[0073] In some embodiments, a plurality of split ring resonator structures 31 are provided on the outer surface of the dielectric director 3, and the distance between any two adjacent split ring resonator structures 31 is equal.

[0074] In a possible implementation manner, referring to Figure 5 , the embodiment of the present application provides a dielectric director 3 with a periodic structure having a square cross-section, and the director assembly 5 is single. As Figure 5As shown, on the outer surface of the dielectric director 3, split-ring resonator structures 31 are cross-placed to form a periodic structure of the dielectric director 3. The period of the split-ring resonator structure 31 is 0.3λ, the size of the dielectric director 3 is 2.1λ * 2.1λ * 2.1λ, and the perpendicular distance from the geometric center of the feed source 1 to the inner surface of the dielectric director 3 is 0.8λ to 0.9λ. Exemplarily, it can be 0.82λ, 0.84λ, 0.86λ, 0.88λ, 0.9λ.

[0075] The equivalent relative permittivity of the dielectric director 3 within the bandwidth is close to 0, so its refractive index is also close to 0. According to Snell's law of refraction, the spherical wave emitted by the feed source 1 becomes a plane wave after refraction on the surface of the dielectric director 3, that is, the conversion from spherical wave to plane wave can be achieved at a smaller distance, thereby improving the gain of the antenna. The dielectric director 3 designed in this way is applicable to various forms of feed source 1, saving the cost of repeated design. At the same time, compared with the Luneburg lens, its electromagnetic wave conversion effect can be achieved by using the printed circuit board (Printed Circuit Board, abbreviated as PCB) surface treatment process, and materials with a relative permittivity of 2.2 to 3.5 can be selected. Exemplarily, it can be 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, 3.5, etc. The dielectric director 3 has the advantages of simple processing and low cost. This solution can be used as a complete antenna unit and can be used in household wireless devices such as routers.

[0076] In some embodiments, the cross-sectional shape of the dielectric director 3 is circular.

[0077] In a possible implementation, referring to Figure 1 , the cross-section of the dielectric director 3 can be circular. In this case, the inner diameter of the dielectric director 3 is 0.2λ to 0.25λ. Exemplarily, it can be 0.2λ, 0.21λ, 0.22λ, 0.23λ, 0.24λ, 0.25λ. The outer diameter of the dielectric director 3 is 0.49λ to 0.55λ. Exemplarily, it can be 0.49λ, 0.50λ, 0.51λ, 0.52λ, 0.53λ, 0.54λ, 0.55λ. The thickness of the dielectric director 3 is 0.29λ to 0.3λ. Exemplarily, it can be 0.292λ, 0.294λ, 0.296λ, 0.298λ, 0.3λ. The height of the dielectric director 3 is 0.5λ to 0.75λ. Exemplarily, it can be 0.5λ, 0.55λ, 0.6λ, 0.65λ, 0.7λ, 0.75λ. Wherein, λ = 1 / f, f is the frequency of the gain antenna, and λ is the wavelength of the gain antenna.

[0078] In some embodiments, the outer surface of the dielectric director 3 is provided with a plurality of microstrip structures 32 of different sizes.

[0079] In a possible implementation, referring to Figure 6 , an embodiment of the present application provides a dielectric director 3 with a circular cross-section, and the director assembly 5 is single. Specifically, as Figure 3 shown, the outer surface of the dielectric director 3 is provided with a plurality of microstrip structures 32 of different sizes and different shapes, thereby forming a dielectric director 3 with an aperiodic structure. The distance between two adjacent microstrip structures 32 is 0.26λ, the radius of the dielectric director 3 is 2.8λ, the height of the dielectric director 3 is 2.9λ, and the perpendicular distance between the geometric center of the feed source 1 and the inner surface of the dielectric director 3 is 2.8λ.

[0080] The microstrip structures 32 of different sizes can achieve different phase changes for electromagnetic waves. According to the phase difference generated by different paths reaching the dielectric director 3, the phase compensation formula can be calculated to determine the size of the microstrip structure 32 at each position. When each path of electromagnetic wave achieves the same phase through phase compensation, the spherical wave emitted by the feed source 1 is converted into a plane wave, and the gain is increased.

[0081] This solution mainly realizes the improvement of gain through phase compensation. The first radiation unit 11 and the second radiation unit 12 of the feed source 1 are cross-set, dividing the space between the feed source 1 and the dielectric director 3 into 4 regions. In this way, the dielectric director 3 with an aperiodic structure is also divided into 4 regions, and the beam can be regulated in 4 directions. The above 4 regions are superimposed at an angle of 360°, forming a circular surface. The internal space of the dielectric director 3 is also a circular surface, and the two adopt a conformal design, which can reduce its volume and improve the design freedom. Materials with a dielectric constant of 2.2 to 3.5 can be selected. Exemplarily, they can be 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 29, 3.0, 3.1, 3.2, 3.3, 3.4, 3.5, etc. The dielectric director 3 can also achieve the effect of improving the antenna gain by using the printed circuit board (Printcd Cicuils Board, abbreviated as PCB) surface treatment process, with the advantages of simple processing and low cost. This solution can be used as a complete antenna unit and can be used in household wireless devices such as routers.

[0082] In some embodiments, the dielectric director 3 and the metal director 4 form a director assembly 5, and the gain antenna includes a plurality of director assemblies 5, which are arranged at intervals along the axis direction perpendicular to the dielectric director 3;

[0083] Along the axis direction perpendicular to the dielectric director 3, the distance between any two adjacent director assemblies 5 is equal.

[0084] In a possible implementation, with reference 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 the figure, the number of director assemblies 5 is two, and the height of the second director assembly 5 is greater than that of the first director assembly 5, which can reflect the beam passing through the first director assembly 5 and the beam not reflected by the first director assembly 5. When there is no constraint on the antenna outer dimension, in principle, the director assembly 5 can be placed at equal-spacing positions, 0.15λ apart, without limitation. That is to say, the director assembly 5 can be designed and used modularly and can be used as a separate expansion unit to meet the antenna size requirements. As the number of director assemblies 5 increases, the antenna gain can be further improved.

[0085] In a second aspect, the present application also provides a communication device including the gain antenna of the first aspect. Since the communication device includes all the technical features of the gain antenna, therefore, the communication device also includes all the beneficial effects of the gain antenna, which will not be elaborated herein.

[0086] To further illustrate the present application, the following provides a detailed description of a gain antenna provided by the present application in conjunction with specific embodiments.

[0087] Figure 1 A gain antenna with a single director assembly 5 is provided. As shown in Figure 1 , compared with the separate feed 1 (with reference to Figure 9 ), in Embodiment 1, the antenna gain can be effectively improved. For data comparison, refer to Figure 10 :

[0088] Taking the 5G frequency band as an example, when using the separate feed 1, the gain at m2 is 0.6 dBi. After adding a single director assembly 5 (including the metal director 4 and the dielectric director 3), the gain at m4 is 1.7 dBi, and the gain is increased by 2.3 dBi. This solution can be used as a complete antenna unit and can be used in household wireless devices such as routers.

[0089] Figure 7 A gain antenna with two director assemblies 5 is provided. As shown in Figure 7 , compared with Embodiment 1, in Embodiment 2, by adding two director assemblies 5, the antenna gain can be further improved. For data comparison, refer to Figure 11 :

[0090] Taking the 5G frequency band as an example, after adding a single director assembly 5, the gain at m4 is 1.7 dBi. After adding two director assemblies 5, the gain at m2 is 3.89 dBi, and the gain is increased by 2.19 dBi.

[0091] Figure 5A dielectric director 3 with a periodic structure having a square cross-section is provided. As shown in Figure 5 , the director assembly 5 is single. The data comparison before and after adding the dielectric director 3 with a periodic structure is referred to Figure 12 :

[0092] Taking the 5G frequency band as an example, before adding the dielectric director 3 with a periodic structure, the gain at m1 is 1.9 dBi. After adding the dielectric director 3 with a periodic structure, the gain at m2 is 6.96 dBi, and the gain is increased by 5.06 dBi.

[0093] Figure 6 A dielectric director 3 with an aperiodic structure having a circular cross-section is provided. As shown in Figure 6 , the director assembly 5 is single. The data comparison before and after adding the dielectric director 3 with an aperiodic structure is referred to Figure 13 :

[0094] Taking the 5G frequency band as an example, before adding the dielectric director 3 with an aperiodic structure, the gain at m3 is 1.99 dBi. After adding the dielectric director 3 with an aperiodic structure, the gain at m4 is 6.07 dBi, and the gain is increased by 4.08 dBi.

[0095] In summary, on the basis of the single feed 1, adding the metal director 4 and the dielectric director 3 can effectively improve the antenna impedance and increase the antenna gain. By designing the periodic structure or aperiodic structure of the dielectric director 3, the effect of further increasing the antenna gain can be achieved.

[0096] Obviously, those skilled in the art can 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 equivalent technologies, this application also intends to include these changes and modifications.

Claims

1. A gain antenna, characterized in that, Comprising: A feed source, including a first radiation unit and a second radiation unit, the first radiation unit and the second radiation unit being arranged crosswise; A reflector; A dielectric director, the dielectric director including a cylindrical structure, the feed source and the reflector being disposed inside the cylindrical structure, and the axial direction of the cylindrical structure coinciding with the intersection line of the feed source; A metal director, including a plurality of metal units, the plurality of metal units being provided on the inner surface of the cylindrical structure and arranged annularly around the axis of the cylindrical structure.

2. The gain antenna according to claim 1, characterized in that, Each of the metal units includes a plurality of metal plates, the plurality of metal plates being arranged in parallel along the axial direction of the cylindrical structure.

3. The gain antenna according to claim 1, characterized in that, The first radiation unit and the second radiation unit form an angle, the angle including a first angle, the first angle being 85° to 95°.

4. The gain antenna according to claim 1, characterized in that, 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.

5. The gain antenna according to claim 1, characterized in that, Along the direction perpendicular to the axis of 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; And / or, the thickness of the dielectric director is 0.29λ to 0.3λ, where λ = 1 / f and f is the frequency of the gain antenna; And / or, 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; And / or, the height of the dielectric director along the axial direction is greater than the height of the feed source along the axial direction.

6. The gain antenna according to any one of claims 1-5, characterized in that, The cross-sectional shape of the dielectric director is square.

7. The gain antenna according to claim 6, characterized in that, The outer surface of the dielectric director is provided with a plurality of split ring resonator structures.

8. The gain antenna according to claim 7, characterized in that, The spacing between any two adjacent split ring resonator structures is equal.

9. The gain antenna according to any one of claims 1-5, characterized in that, The cross-sectional shape of the dielectric director is circular.

10. The gain antenna according to claim 9, characterized in that, The outer surface of the dielectric director is provided with a plurality of microstrip structures of different sizes.

11. The gain antenna according to any one of claims 1-5, characterized in that, The dielectric director and the metal director form a director assembly, the gain antenna including a plurality of the director assemblies, and the plurality of director assemblies being arranged at intervals along the direction perpendicular to the axis of the dielectric director.

12. The gain antenna according to claim 11, characterized in that, Along the direction perpendicular to the axis of the dielectric director, the spacing between any two adjacent director assemblies is equal.

13. A communication device, characterized in that, Including the gain antenna according to any one of claims 1-11.

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