Dual-frequency signal enhancer

Abstract

The invention provides a dual-frequency signal enhancer, and relates to the technical field of antennas. The dual-frequency signal enhancer comprises a dielectric plate, a first reflector and a second reflector, the dielectric plate is provided with a placement area for placing an antenna, the first reflector and the second reflector are both arranged on the dielectric plate and located on the same side of the placement area, the first reflector is used for enhancing signals of a first preset frequency band, and the second reflector is used for enhancing signals of a second preset frequency band. The first reflector and the second reflector are used for jointly enhancing signals of a second preset frequency band, any frequency value in the first preset frequency band is smaller than any frequency value in the second preset frequency band, and a feed source of the antenna is located in the center of the placement area. The dual-frequency signal enhancer can effectively enhance the low-frequency band and the high-frequency band of the antenna while simplifying the structure.

Description

Technical Field

[0001] The present application relates to the field of antenna technology, and in particular to a dual-frequency signal enhancer. Background Art

[0002] The drone remote control antenna is generally based on a dual-frequency dipole, which works in two frequency bands, one for uplink transmission of control signals and the other for downlink transmission of observation signals such as video. In order to increase the remote control distance and signal transmission quality of the drone, a signal booster is usually used to improve the directivity and gain of the drone remote control.

[0003] Signal enhancers are usually implemented using reflective antennas and metal rod-directed antennas. The reflective antenna has a relatively complex structure and is relatively large in size, while the metal rod-directed antenna has only one reflector and cannot simultaneously provide a good reflection enhancement effect on both the low-frequency and high-frequency bands of the drone remote control antenna. Summary of the invention

[0004] The purpose of the present application includes, for example, providing a dual-frequency signal enhancer that can effectively enhance the low-frequency band and high-frequency band of the antenna while simplifying the structure.

[0005] The embodiments of the present application can be implemented as follows:

[0006] An embodiment of the present application provides a dual-band signal enhancer, which includes a dielectric plate, a first reflector and a second reflector, wherein the dielectric plate is provided with a placement area for placing an antenna, the first reflector and the second reflector are both arranged on the dielectric plate and located on the same side of the placement area, the first reflector is used to enhance the signal of a first preset frequency band, and the first reflector and the second reflector are used to jointly enhance the signal of a second preset frequency band, wherein any frequency value in the first preset frequency band is less than any frequency value in the second preset frequency band, and the feed source of the antenna is located at the center of the placement area.

[0007] Optionally, the first reflector includes a first reflective segment and two bent segments connected to two ends of the first reflective segment, the first reflective segment extends along a first direction, and the bent segment extends along a second direction, wherein the first direction is perpendicular to the second direction.

[0008] Optionally, the second reflector includes a second reflective segment, the second reflective segment extends along the first direction, and the distance between the second reflective segment and the center of the placement area is smaller than the distance between the first reflective segment and the center of the placement area.

[0009] Optionally, the length of the second reflective segment is smaller than the length of the first reflective segment.

[0010] Optionally, the dual-band signal enhancer further includes a director for enhancing signals in the first preset frequency band and the second preset frequency band, wherein the director is disposed on the dielectric plate and is located on both sides of the placement area together with the first reflector or the second reflector.

[0011] Optionally, the director includes a first director and a second director, and a distance between the first director and the center of the placement area is smaller than a distance between the second director and the center of the placement area.

[0012] Optionally, the director is in the shape of a rectangle or a diamond.

[0013] Optionally, the first reflector, the second reflector and the director are all metal structures.

[0014] Optionally, the dielectric plate is a rectangular parallelepiped structure, the length of the dielectric plate is 60-64 mm, the width of the dielectric plate is 40-47 mm, and the height of the dielectric plate is 0.5-1.5 mm.

[0015] Optionally, the medium plate is made of glass fiber epoxy resin material.

[0016] The beneficial effects of the dual-frequency signal enhancer provided by the embodiment of the present application include, for example: in order to effectively enhance the low frequency band and high frequency band of the antenna while simplifying the structure, a dual-frequency signal enhancer is designed, the dual-frequency signal enhancer includes a dielectric plate, a first reflector and a second reflector, a placement area for placing the antenna is provided on the dielectric plate, the first reflector and the second reflector are both arranged on the dielectric plate and located on the same side of the placement area, the first reflector is used to enhance the signal of the first preset frequency band, and the first reflector and the second reflector are used together to enhance the signal of the second preset frequency band, wherein any frequency value in the first preset frequency band is less than any frequency value in the second preset frequency band, and the feed source of the antenna is located at the center of the placement area. By integrating the first reflector and the second reflector on the same dielectric plate, the structure of the signal enhancer is simplified so as to reduce the volume, and when the antenna is placed in the placement area, the first reflector can enhance the signal of the first preset frequency band of the antenna, and the first reflector and the second reflector can jointly enhance the signal of the second preset frequency band of the antenna, thereby effectively enhancing the low frequency band and the high frequency band of the antenna. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is a schematic diagram of a dual-band signal enhancer from a first perspective in an embodiment of the present application;

[0019] Figure 2 This is a schematic diagram of a second viewing angle of a dual-band signal enhancer in an embodiment of the present application;

[0020] Figure 3 This is a schematic diagram of a first-viewing angle of a Yagi antenna in an embodiment of the present application;

[0021] Figure 4 A schematic diagram of a second viewing angle of a Yagi antenna in an embodiment of the present application;

[0022] Figure 5 This is a schematic diagram for showing the antenna operating frequency in an embodiment of the present application;

[0023] Figure 6 It is used to show the gain pattern of the antenna at the 2.4 GHz frequency in the embodiment of the present application;

[0024] Figure 7 It is used to show the gain pattern of the antenna at the 5.8 GHz frequency in the embodiment of the present application.

[0025] Icons: 1- dielectric plate; 11- placement area; 2- first reflector; 21- first reflection section; 22- bending section; 3- second reflector; 4- first director; 5- second director; 6- antenna; 61- feed source; 62- high frequency branch section; 63- low frequency branch section. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0028] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0029] In the description of the present application, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, it is based on the orientation or position relationship shown in the drawings, or is the orientation or position relationship in which the product of the invention is usually placed when used. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0030] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0031] It should be noted that, in the absence of conflict, the features in the embodiments of the present application may be combined with each other.

[0032] As disclosed in the background technology section, there are generally three types of signal enhancers for drone remote control antennas. The first type is based on a reflector antenna structure, the second type is based on a directional antenna structure, and the third type is a combination of a reflector antenna structure and a directional antenna structure. Among them, the first and third types of signal enhancers are relatively complex in structure and large in size, resulting in high costs and inconvenience in storage, while the second type of signal enhancer uses a traditional metal rod directional antenna structure with only one reflector, which cannot simultaneously play a good reflection enhancement role for the low-frequency band and the high-frequency band of the drone remote control antenna. The embodiments of the present application provide a dual-frequency signal enhancer that can effectively enhance the low-frequency band and the high-frequency band of the antenna while simplifying the structure of the signal enhancer.

[0033] Please refer to Figure 1 , Figure 2 The dual-band signal enhancer provided in an embodiment of the present application includes a dielectric plate 1, a first reflector 2 and a second reflector 3. The dielectric plate 1 is provided with a placement area 11 for placing the antenna 6. The first reflector 2 and the second reflector 3 are both arranged on the dielectric plate 1 and are located on the same side of the placement area 11. The first reflector 2 is used to enhance the signal of the first preset frequency band, and the first reflector 2 and the second reflector 3 are used to jointly enhance the signal of the second preset frequency band, wherein any frequency value in the first preset frequency band is less than any frequency value in the second preset frequency band, and the feed source 61 of the antenna 6 is located at the center of the placement area 11.

[0034] The placement area 11 is close to the middle of the dielectric plate 1. This embodiment is explained by taking the placement of a dipole antenna in the placement area 11 as an example. The dipole antenna is combined with a dual-frequency signal enhancer to form a Yagi antenna. The first preset frequency band and the second preset frequency band are two working frequency bands of the Yagi antenna. The first preset frequency band can be selected as 2.08-2.6GHz, which belongs to the low frequency band, and the second preset frequency band can be selected as 5.52-6.8GHz, which belongs to the high frequency band.

[0035] By integrating the first reflector 2 and the second reflector 3 on the same dielectric plate 1, the structure of the signal enhancer is simplified to reduce the volume. At the same time, when the antenna 6 is placed in the placement area 11, the first reflector 2 can enhance the signal of the first preset frequency band of the antenna 6, and the first reflector 2 and the second reflector 3 can jointly enhance the signal of the second preset frequency band of the antenna 6, thereby effectively enhancing the low frequency band and the high frequency band of the antenna 6.

[0036] In some embodiments, the first reflector 2 includes a first reflective segment 21 and two bent segments 22 connected to both ends of the first reflective segment 21, the first reflective segment 21 extends along a first direction, and the bent segment 22 extends along a second direction, wherein the first direction is perpendicular to the second direction.

[0037] The first reflection section 21 and the bending section 22 are both in the shape of rectangular strips. The dielectric plate 1 is a rectangular parallelepiped structure. The first reflection section 21 is close to one of the short side edges of the dielectric plate 1 and is parallel to the short side of the dielectric plate 1. The two bending sections 22 are respectively close to the two long side edges of the dielectric plate 1 and both extend toward the placement area 11. The two bending sections 22 are both bent 90° relative to the first reflection section 21.

[0038] In some other embodiments, the first reflector 2 may further include a plurality of continuous reflective segments, and two adjacent reflective segments are relatively bent, as long as the total length of the first reflector 2 is kept unchanged.

[0039] In some embodiments, the second reflector 3 includes a second reflective segment extending along the first direction, and a distance between the second reflective segment and the center of the placement area 11 is smaller than a distance between the first reflective segment 21 and the center of the placement area 11 .

[0040] The second reflective segment is also in a rectangular strip shape. The second reflective segment is parallel to the first reflective segment 21 . The second reflective segment is closer to the center of the placement area 11 than the first reflective segment 21 . The length of the second reflective segment is less than that of the first reflective segment 21 .

[0041] The sum of the lengths of the first reflection segment 21 and the two bending segments 22 is greater than the length of the second reflection segment. On the one hand, the first reflector 2 including the first reflection segment 21 and the two bending segments 22 can enhance the signal of the first preset frequency band. On the other hand, the first reflection segment 21, the two bending segments 22 and the second reflection segment can cooperate to enhance the signal of the second preset frequency band, thereby effectively enhancing the low frequency band and the high frequency band of the antenna 6.

[0042] In some embodiments, the dual-band signal enhancer also includes a director for enhancing the signals of the first preset frequency band and the second preset frequency band. The director is arranged on the dielectric plate 1 and is located on both sides of the placement area 11 with the first reflector 2 or the second reflector 3 .

[0043] In the second direction, the first reflector 2 and the second reflector 3 are located on one side of the placement area 11, and the director is located on the other side of the placement area 11. The director can further enhance the signals of the first preset frequency band and the second preset frequency band on the basis of enhancing the signals of the first preset frequency band and the signals of the second preset frequency band played by the first reflector 2 and the second reflector 3.

[0044] In some embodiments, the director includes a first director 4 and a second director 5 , and the distance between the first director 4 and the center of the placement area 11 is smaller than the distance between the second director 5 and the center of the placement area 11 .

[0045] In the second direction, the first director 4 and the second director 5 are arranged in sequence, and the first director 4 is closer to the center of the placement area 11 than the second director 5. The first director 4 and the second director 5 can further enhance the signals of the first preset frequency band and the second preset frequency band on the basis of the first reflector 2 and the second reflector 3 enhancing the signals of the first preset frequency band and the second preset frequency band.

[0046] In some other embodiments, the number of directors is more than three. It can be understood that the number of directors can be determined according to actual working conditions. As long as the directors can play the role of enhancing the working frequency band signal as required, there is no limitation on this.

[0047] Optionally, the shape of the director is rectangular. It is understandable that in other embodiments, the shape of the director can also be rhombus or other polygons, which is not limited to this.

[0048] In some embodiments, the first reflector 2, the second reflector 3 and the director are all metal structures.

[0049] It should be noted that the first reflector 2, the second reflector 3 and the director can all be formed by etching corresponding metal patch structures on one side surface of the dielectric plate 1 using printed circuit board technology. When the first reflector 2, the second reflector 3 and the director are all metal patches, the structure of the dual-frequency signal enhancer can be simplified and the size can be reduced.

[0050] In some other embodiments, the first reflector 2, the second reflector 3 and the director may also be metal rod structures or metal structures of other shapes, which is not limited to this.

[0051] In some embodiments, the length of the dielectric plate 1 is 60-64 mm, the width of the dielectric plate 1 is 40-47 mm, and the height of the dielectric plate 1 is 0.5-1.5 mm.

[0052] When the length, width and height of the dielectric plate 1 are within the above ranges, the volume of the entire dual-frequency signal enhancer is small and convenient for storage; the height of the dielectric plate 1 is small, so that the dual-frequency signal enhancer is in the shape of a thin sheet as a whole, which is conducive to conformity with the carrier surface.

[0053] Exemplarily, the length of the dielectric plate 1 is 60 mm, 62 mm or 64 mm, the width of the dielectric plate 1 is 40 mm, 43.5 mm or 47 mm, and the height of the dielectric plate 1 is 0.5 mm, 1 mm or 1.5 mm.

[0054] In some embodiments, the dielectric plate 1 is made of glass fiber epoxy resin material.

[0055] Glass fiber epoxy resin is a composite material with glass fiber as a reinforcing material and epoxy resin as a matrix. For example, the dielectric plate 1 can be made of glass fiber epoxy resin material with a dielectric constant of 3.4. The dielectric plate 1 can be processed by molds or machine tool milling methods.

[0056] It can be understood that in some other embodiments, the glass fiber epoxy resin can also be replaced by other fiber materials or resin-based materials, as long as they can be processed and used as the medium board 1.

[0057] Please refer to Figure 3 , Figure 4 The embodiment of the present application takes the drone remote control antenna as a sample, which can be selected as a WLAN dual-band dipole antenna. The dipole antenna includes two groups of high-frequency branches 62 and low-frequency branches 63. The two groups of high-frequency branches 62 and low-frequency branches 63 are centrally symmetrically distributed about the center of the dipole antenna.

[0058] The plane where the dipole antenna is located is the same plane as the plane where the reflector and the director are located, and this plane is the xoy plane; or, the plane where the dipole antenna is located is perpendicular to the plane where the reflector and the director are located, and in this case, the plane where the dipole antenna is located is the yoz plane.

[0059] Taking the dipole antenna plane and the reflector and director plane as the same plane as an example, D0 is the width of the connection between the two sets of high-frequency branches 62 and the low-frequency branches 63, H0 and W0 are the length and width of the connection between the high-frequency branches 62 and the low-frequency branches 63, respectively, L 11 and W1 are the length and width of the high-frequency branch 62, respectively. 21 and W2 are the length and width of the first section of the low-frequency branch 63, L 22 W3 and W4 are respectively the length and width of the second section of the low-frequency branch 63, W3 and W2 are respectively the length and width of the connection between the first section and the second section of the low-frequency branch 63, L r is the length of the first reflection section 21, W r1 is the length of the bending section 22, W r2 is the width of the first reflection segment 21, S r is the distance between the first reflection section 21 and the second reflection section, W r3 is the width of the second reflection segment, L r1 is the length of the second reflection segment, S r1 is the shortest distance between the second reflector segment and the dipole antenna, S1 and S2 are the distances between the center of the first director 4 and the second director 5 and the center of the dipole antenna, respectively, and L d1 and L d2 are the lengths of the first director 4 and the second director 5, respectively, d1 and W d2 are the widths of the first director 4 and the second director 5 respectively, and H is the height of the dielectric plate 1.

[0060] In order to achieve good adaptation between the first reflector 2, the second reflector 3, the first director 4 and the second director 5 and the dipole antenna, the specific values ​​of the above parameters can be selected as follows: L 11 =5.2mm, L 21 =11mm, L 22 =5.5mm, D0=2mm, H0=8mm, W0=2.5mm, W1=3.5mm, W2=2.5mm, W3=5mm, L r =43.5mm, W r1 =12mm, W r2 =2mm, S r =20mm, W r3 =2mm, L r1 =25mm, S r1 =10mm, Ld1 =13.2mm, L d2 =13.2mm, S1=18mm, S2=16mm, W d1 =3.4mm, W d2 =3.4mm.

[0061] It should be noted that in actual application of the dipole antenna, the sizes of various parts of the dual-frequency signal enhancer can be adjusted according to the working frequency of antenna 6, so that after the dual-frequency signal enhancer is loaded onto the dipole antenna, the directional gain of antenna 6 at the original working frequency is enhanced.

[0062] like Figure 5 As shown, when the reflection coefficient S11 is less than -10dB, the antenna 6 includes a first preset frequency band with a frequency range of 2.08-2.6GHz and a second preset frequency band with a frequency range of 5.52-6.8GHz, and the absolute bandwidths of the first preset frequency band and the second preset frequency band are 0.52GHz and 1.28GHz respectively, and the relative bandwidths are 21.7% and 22.1% respectively.

[0063] Figure 6 and Figure 7 The gain radiation patterns of the electric field plane (E plane) and the magnetic field plane (H plane) of antenna 6 at 2.4 GHz and 5.8 GHz are shown respectively, which have obvious directivity. The maximum radiation gains at 2.4 GHz and 5.8 GHz are 4.39 dB and 5.88 dB respectively, and the radiation gain is maximum in the direction of phi=90° (positive y-axis).

[0064] In summary, the embodiment of the present application provides a dual-band signal enhancer. By integrating the first reflector 2 and the second reflector 3 in the form of metal patches on the same dielectric plate 1, the structure of the signal enhancer is simplified to reduce the volume. At the same time, when the antenna 6 is placed in the placement area 11, the first reflector 2 can enhance the signal of the first preset frequency band of the antenna 6, and the first reflector 2 and the second reflector 3 can jointly enhance the signal of the second preset frequency band of the antenna 6. The first director 4 and the second director 5 can further enhance the signals of the first preset frequency band and the second preset frequency band of the antenna 6 on the basis of the reflectors playing the role of enhancing the signals of the frequency bands, thereby effectively enhancing the low frequency band and the high frequency band of the antenna 6.

[0065] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A dual-frequency signal enhancer, characterized in that: It includes a dielectric plate, a first reflector and a second reflector, wherein the dielectric plate is provided with a placement area for placing an antenna, the first reflector and the second reflector are both arranged on the dielectric plate and located on the same side of the placement area, the first reflector is used to enhance the signal of a first preset frequency band, and the first reflector and the second reflector are used to jointly enhance the signal of a second preset frequency band, wherein any frequency value in the first preset frequency band is less than any frequency value in the second preset frequency band, and the feed source of the antenna is located at the center of the placement area.

2. The dual-frequency signal enhancer according to claim 1, characterized in that: The first reflector includes a first reflective segment and two bent segments connected to two ends of the first reflective segment, the first reflective segment extends along a first direction, and the bent segments extend along a second direction, wherein the first direction is perpendicular to the second direction.

3. The dual-frequency signal enhancer according to claim 2, characterized in that: The second reflector includes a second reflective segment extending along a first direction, and a distance between the second reflective segment and the center of the placement area is smaller than a distance between the first reflective segment and the center of the placement area.

4. The dual-frequency signal enhancer according to claim 3, characterized in that: The length of the second reflection segment is shorter than the length of the first reflection segment.

5. The dual-frequency signal enhancer according to claim 1, characterized in that: The dual-frequency signal enhancer also includes a director for enhancing signals of the first preset frequency band and the second preset frequency band. The director is arranged on the dielectric plate and is located on both sides of the placement area together with the first reflector or the second reflector.

6. The dual-frequency signal enhancer according to claim 5, characterized in that: The director includes a first director and a second director, and a distance between the first director and the center of the placement area is smaller than a distance between the second director and the center of the placement area.

7. The dual-frequency signal enhancer according to claim 5, characterized in that: The director is in the shape of a rectangle or a rhombus.

8. The dual-frequency signal enhancer according to claim 5, characterized in that: The first reflector, the second reflector and the director are all metal structures.

9. The dual-frequency signal enhancer according to claim 1, characterized in that: The dielectric plate is a rectangular parallelepiped structure, the length of the dielectric plate is 60-64 mm, the width of the dielectric plate is 40-47 mm, and the height of the dielectric plate is 0.5-1.5 mm.

10. The dual-frequency signal enhancer according to claim 1, characterized in that: The medium plate is made of glass fiber epoxy resin material.

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