Plane lens and high-gain array antenna

Abstract

The invention relates to a plane lens. Comprising two metal sheet groups, each metal sheet group comprises four metal sheets, the four metal sheets of each metal sheet group are coplanar, and the planes where the two metal sheet groups are located are parallel to each other and are arranged at intervals; the four metal sheets of each metal sheet group are distributed in a shape like a Chinese character'tian ', and the metal sheets of the metal sheet groups are opposite in a one-to-one correspondence mode. The plane lens has the advantages of being simple in structure, reasonable in design, capable of greatly improving the gain of an antenna in use so as to meet use requirements and the like. The invention also relates to a high-gain array antenna. Each oscillator of the high-gain array antenna is provided with a lens in the main radiation direction. The high-gain array antenna has the advantages that the gain can be increased by more than 1db on the premise that an oscillator does not need to be additionally arranged, a mounting plate with a large area does not need to be replaced, refitting is convenient, the windward side area of the antenna cannot be increased, potential safety hazards are small, and mounting is convenient.

Description

Technical Field

[0001] The present invention relates to the field of communication technologies, and particularly to a planar lens and a high-gain array antenna. Background Art

[0002] Currently, the way to increase the gain of a flat panel array antenna is achieved by adding a sufficient number of oscillators. Such a method makes the flat panel array antenna require a mounting plate with a large area. Such a structure is very difficult to retrofit for existing installed flat panel array antennas. Moreover, the windward side of the produced flat panel array antenna is large, making it very difficult to install, and there are also significant safety hazards after installation. Additionally, although installing a planar lens on a flat panel array antenna is also a method to increase the gain, the current planar lens structure is very complex, and generally, it can only increase the gain of the antenna by about 0.5 dB during use. The gain improvement effect is not good and cannot meet the usage requirements of the antenna. Summary of the Invention

[0003] The purpose of the present invention is to provide a planar lens, which has the advantages of simple structure, reasonable design, and can greatly increase the gain of an antenna during use to meet the usage requirements, etc.

[0004] The technical solution of this planar lens is realized as follows: a planar lens; in particular, it includes 2 groups of metal sheet groups, each group of metal sheet groups respectively includes 4 metal sheets, the 4 metal sheets of each metal sheet group are coplanar, and the planes where the 2 groups of metal sheet groups are located are parallel to each other and are spaced apart; the 4 metal sheets of each metal sheet group are distributed in a "field" shape, and the metal sheets between the metal sheet groups are in one-to-one correspondence and face each other.

[0005] In the production of this solution, while the area size of the metal sheets can be designed, the distance between the planes where different metal sheet groups are located is optimized, thereby determining the application frequency band and the corresponding refractive index of this planar lens. As a result, when the electromagnetic wave generated by the oscillator passes through this planar lens during application, the gain can be increased by more than 1 dB to meet the usage needs.

[0006] Furthermore, this planar lens further includes a connecting member and 2 housings; the 2 housings are respectively on both sides of the connecting member, and each housing is respectively connected to the connecting member, so that the 2 housings are assembled to form an installation space; the 2 groups of metal sheet groups are both located in the installation space.

[0007] Furthermore, the housing is a foamed material part, and the housing openings of each housing are respectively sleeved and connected to the connecting member; a metal sheet group is respectively fixed on the inner wall of each housing.

[0008] Furthermore, each metal sheet group is respectively arranged on a dielectric plate, and the dielectric plate is installed in the installation space.

[0009] Further, two installation surfaces are arranged in the installation space, the two installation surfaces are oppositely arranged, the two groups of metal sheet groups correspond to the two installation surfaces, the medium plate on which the metal sheet groups are arranged is installed on the installation surface, and a gusset plate is further arranged between the installation surface and the medium plate.

[0010] Further, the connecting piece is in a frame-shaped structure, and at least two connecting lugs are further arranged on the periphery of the connecting piece.

[0011] The plane lens has the advantages of simple structure, reasonable design, and greatly improved gain of the antenna during use, and meets the use requirements.

[0012] The application further provides a high-gain array antenna, which has the advantages of simple structure, reasonable design, greatly improved gain without adding oscillators, convenient modification without replacing a large-area installation plate, small windward area of the antenna, small safety hazard, and convenient installation.

[0013] The technical scheme of the high-gain array antenna is as follows: a high-gain array antenna, comprising an installation plate, wherein an oscillator array is installed on the installation plate, and the oscillator array comprises a plurality of oscillators; in particular, each oscillator is provided with a lens in the main radiation direction thereof; the lens is the plane lens in the previous scheme, and the plane on which each metal sheet group of the lens is arranged is perpendicular to the main radiation direction of the oscillator.

[0014] Further, the oscillator is a dual-polarized oscillator, and the four metal sheets of each metal sheet group of the lens and the four oscillator arms of the oscillator overlap one by one in orthographic projection on the installation plate.

[0015] Further, the working wavelength of the oscillator is λ, each metal sheet of the lens is in a square contour, and the side length of the metal sheet is in the range of 0.2λ to 0.24λ.

[0016] The oscillator of the scheme has the following three kinds, and the parameters in the lens are different due to different working frequencies of the oscillators, and the specific conditions are as follows:

[0017] One is that the oscillator is a single-frequency oscillator, the working frequency of the oscillator is in the range of 0.6GHz to 1GHz, the distance D1 between the planes on which different metal sheet groups in the lens are arranged is in the range of 60mm to 70mm, the distance D2 between adjacent metal sheets of the same metal sheet group is in the range of 6mm to 10mm, each metal sheet is in a square contour, and the side length L1 of the metal sheet is in the range of 75mm to 90mm.

[0018] The third is that the vibrator is a dual-frequency vibrator, the vibrator includes a low-frequency vibrator unit and a middle-frequency vibrator unit, the middle-frequency vibrator unit is nested in the low-frequency vibrator unit; the working frequency of the middle-frequency vibrator unit is in the range of 1.695GHz-2.69GHz; the lens is in the main radiation direction of the middle-frequency vibrator unit and is completely or partially in the low-frequency vibrator unit; the interval D3 between the planes where different metal sheet groups in the lens are located is in the range of 24mm-28mm; the interval D4 between adjacent metal sheets of the same metal sheet group is in the range of 2.5mm-4mm; each metal sheet is a square profile, and the side length L2 of the metal sheet is in the range of 30mm-36mm.

[0019] The third is that the vibrator is a dual-frequency vibrator, the vibrator includes a low-frequency vibrator unit and a middle-frequency vibrator unit, the middle-frequency vibrator unit is nested in the low-frequency vibrator unit; the working frequency of the middle-frequency vibrator unit is in the range of 1.695GHz-2.69GHz; the lens is in the main radiation direction of the middle-frequency vibrator unit and is completely or partially in the low-frequency vibrator unit; the interval D3 between the planes where different metal sheet groups in the lens are located is in the range of 24mm-28mm; the interval D4 between adjacent metal sheets of the same metal sheet group is in the range of 2.5mm-4mm; each metal sheet is a square profile, and the side length L2 of the metal sheet is in the range of 30mm-36mm.

[0020] The high-gain array antenna has the advantages that the high-gain array antenna has a gain increased by more than 1db without adding a vibrator, does not need to replace a large-area mounting plate, is convenient to modify, does not increase the windward area of the antenna, has small safety hazards, and is convenient to install. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a perspective structural schematic diagram of the embodiment 1.

[0022] Figure 2 It is a front view structural schematic diagram of the embodiment 1.

[0023] Figure 3 It is a front view structural schematic diagram of the lens. Figure 2 It is a sectional view structural schematic diagram in the A-A direction.

[0024] Figure 4 It is a disassembled structural schematic diagram of the embodiment 1.

[0025] Figure 5 It is a disassembled structural schematic diagram of the embodiment 2.

[0026] Figure 6 It is a perspective structural schematic diagram of the embodiment 3.

[0027] Figure 7 It is a disassembled structural schematic diagram of the embodiment 3.

[0028] Figure 8 It is a front view structural schematic diagram of the lens of the embodiment 3.

[0029] Figure 9 is Figure 8 The schematic cross-sectional structure diagram in the B-B direction in

[0030] Figure 10 is the transmission amplitude diagram of the lens in Example 3 during simulation.

[0031] Figure 11 is the refractive index diagram of the lens in Example 3 during simulation.

[0032] Figure 12 is the schematic structure diagram of Example 4.

[0033] Figure 13 is the schematic structure diagram after the lens of Example 4 is installed on the oscillator.

[0034] Figure 14 is the front view schematic structure diagram of the lens of Example 4.

[0035] Figure 15 is Figure 14 the schematic cross-sectional structure diagram in the C-C direction in

[0036] Explanation of reference numerals in the drawings: 1 - metal sheet group; 11 - metal sheet; 2 - connecting member; 21 - connecting ear; 3 - housing; 4 - installation space; 41 - installation surface; 5 - dielectric plate; 6 - mounting plate; 7 - lens; 8 - cylinder; 9 - end cover; 10 - oscillator; 101 - low-frequency oscillator unit; 102 - medium-frequency oscillator unit; 20 - plate member. Detailed implementation manners

[0037] Example 1

[0038] As Figure 1 , Figure 2 , Figure 3 , [[ID=四十九]] Figure 4 shown, this example is a planar lens, including 2 groups of metal sheet groups 1, each group of metal sheet groups 1 respectively includes 4 metal sheets 11, the 4 metal sheets 11 of each metal sheet group 1 are coplanar, the planes where the 2 groups of metal sheet groups 1 are located are parallel to each other and are spaced apart; the 4 metal sheets 11 of each metal sheet group 1 are distributed in a "field" shape, and the metal sheets 11 between the metal sheet groups 1 are in one-to-one correspondence and face each other. When manufacturing this planar lens, while the area size of the metal sheets 11 can be designed, the distance between the planes where different metal sheet groups 1 are located can also be optimized, so as to determine the application frequency band and the corresponding refractive index of this planar lens, so that the electromagnetic wave generated by the oscillator can increase the gain by more than 1 db after passing through this planar lens, to meet the usage requirements.

[0039] To make the structure of this planar lens more reasonable, as Figure 1 ,Figure 2 , Figure 3 , Figure 4 As shown, this planar lens also includes a connector 2 and two housings 3; the two housings 3 are located on both sides of the connector 2, and each housing 3 is connected to the connector 2, so that the two housings 3 are assembled to form an installation space 4; the two sets of metal sheet groups 1 are both located in the installation space 4.

[0040] To make the assembly of connector 2 and housing 3 easier, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the shell 3 is made of foam material. The shell opening of each shell 3 is respectively connected to the connector 2. Specifically, the shell opening of each shell 3 is connected to the connector 2 by interference fit. This structure does not require fasteners and is very convenient and quick to assemble. Each shell 3 has a metal sheet group 1 fixed to its inner wall. The metal sheet 11 of the metal sheet group 1 is specifically set on the inner bottom surface of the shell 3 by copper plating.

[0041] To make the installation of this planar lens more convenient during use, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the connector 2 is a frame-shaped structure, and at least two connecting ears 21 are provided around the connector 2. When in use, the connecting ears 21 of the connector 2 are mounted on the antenna mounting plate by means of a column.

[0042] Example 2

[0043] The difference between this embodiment and Embodiment 1 is that: Figure 5 As shown, each metal sheet group 1 is respectively disposed on a dielectric substrate 5, which is installed in the mounting space. This structure makes the metal sheet 11 easier to manufacture and helps to improve production efficiency; in addition, to further improve production efficiency, the metal sheet 11 can be disposed on the dielectric substrate 5 by copper plating.

[0044] Furthermore, such as Figure 5As shown, two mounting surfaces 41 are arranged in the mounting space, the inner bottom surface of each shell 3 is one of the mounting surfaces 41, the two mounting surfaces 41 are oppositely arranged, the two groups of metal sheet groups 1 correspond to the two mounting surfaces 41, the medium plate 5 on which the metal sheet group 1 is arranged is mounted on the mounting surface 41, and a backing plate (not shown in the drawings) is further arranged between the mounting surface 41 and the medium plate 5. Such a structure can produce backing plates of various specifications and different thicknesses during production, so that the shell 3 and the connecting piece 2 become universal parts, and only the appropriate backing plate needs to be placed between the inner bottom surface of the shell 3 and the medium plate 5 inside it during production to adjust the distance between the planes on which the different metal sheet groups 1 of the planar lens are arranged, and further adjust the refractive index of the planar lens.

[0045] Embodiment 3

[0046] As shown in Figure 6 , Figure 7 , the embodiment is a high-gain array antenna, which comprises a mounting plate 6 on which a dipole array is mounted, the dipole array comprises a plurality of dipoles (not shown in the drawings); each dipole is respectively provided with a lens 7 in the main radiation direction thereof; the lens 7 is the planar lens described in Embodiment 1, and the planes on which the metal sheet groups of the lens 7 are arranged are perpendicular to the main radiation direction of the dipole.

[0047] In order to make the structure of the high-gain array antenna more reasonable, the dipole is a dual-polarized dipole, and the four metal sheets 11 of each metal sheet group of the lens 7 correspond to and overlap the four dipole arms of the dipole in the orthographic projection on the mounting plate 6.

[0048] The dipole of the high-gain array antenna is a low-frequency dipole, the working frequency of the dipole is in the range of 0.6GHz-1GHz, and the main wavelength is 0.8GHz; in order to make the lens 7 suitable for the use requirement of the working frequency of 0.8GHz, as shown in Figure 8 , Figure 9 , the distance D1 between the planes on which the different metal sheet groups of the lens 7 are arranged is 65mm; the distance D2 between the adjacent metal sheets 11 of the same metal sheet group is 8mm; each metal sheet 11 is square in profile, and the side length L1 of the metal sheet 11 is 82mm. As shown in Figure 10 , Figure 11 , during simulation testing, when the electromagnetic wave of 0-0.96GHz passes through the lens 7, the S21 transmission amplitude satisfies better than -3db, and when the electromagnetic wave is 0.8GHz, the corresponding refractive index is 2.47, the refractive index is relatively high, the refraction of the electromagnetic wave of the corresponding frequency after passing through is relatively strong, and further the electromagnetic wave emitted by the dipole of the high-gain array antenna can greatly improve the gain after passing through the lens 7.

[0049] In order to prevent dust and moisture, as shown in Figure 6 ,Figure 7 As shown, this high-gain array antenna also includes a cylindrical body 8 and two end caps 9; the mounting plate 6, the vibrator and the lens 7 are all installed inside the cylindrical body 8; the two end caps 9 are respectively placed and fixed on the two openings of the cylindrical body 8.

[0050] Example 4

[0051] The difference between this embodiment and embodiment 3 is that: Figure 12 , Figure 13 As shown, the oscillator 10 in this embodiment includes a low-frequency oscillator unit 101 and an intermediate-frequency oscillator unit 102, with the intermediate-frequency oscillator unit 102 nested within the low-frequency oscillator unit 101. The operating frequency of the intermediate-frequency oscillator unit 102 is in the range of 1.695 GHz to 2.69 GHz, and the main wavelength is 2.2 GHz. The lens 7 is located in the main radiation direction of the intermediate-frequency oscillator unit 102 and is partially located within the low-frequency oscillator unit 101. Since the lens 7 is partially located within the low-frequency oscillator unit 101, the lens 7 of this high-gain array antenna also differs structurally from the lens in Embodiment 1. The lens 7 in this high-gain array antenna does not have a connecting lug; the lens 7 is mounted on the mounting plate 6 via a plate 20. To make the lens 7 suitable for use at the 2.2 GHz operating frequency, such as... Figure 14 , Figure 15 As shown, the distance D3 between the planes of different metal sheet groups in lens 7 is 26mm; the distance D4 between adjacent metal sheets 11 in the same metal sheet group is 3mm; each metal sheet 11 has a square outline and the side length L2 of the metal sheet 11 is 33mm; with this structure, the electromagnetic waves emitted by the intermediate frequency dipole unit 102 of this high-gain array antenna can be significantly improved after passing through lens 7 during use. To meet the usage requirements, the dipoles 10 in this embodiment are arranged to form a 6-row, 2-column dipole array. In each column, there is also an intermediate dipole between each pair of adjacent dipoles 10. This intermediate dipole is the same as the intermediate frequency dipole unit 102, and a lens 7 is also provided in the main radiation direction of the intermediate dipole.

Claims

1. A planar lens; characterized by: It includes two groups of metal sheet groups. Each group of metal sheet groups includes four metal sheets. The four metal sheets of each group of metal sheet groups are coplanar. The planes where the two groups of metal sheet groups are located are parallel to each other and are spaced apart. The four metal sheets of each group of metal sheet groups are distributed in a "field" shape, and the metal sheets between the groups of metal sheet groups are in one-to-one correspondence and face each other.

2. A planar lens according to claim 1, wherein: It further includes a connecting member and two housings. The two housings are respectively on both sides of the connecting member. Each housing is connected to the connecting member, so that the two housings are assembled to form an installation space. The two groups of metal sheet groups are both in the installation space.

3. A planar lens according to claim 2, wherein: The housing is a foamed material part. The openings of each housing are respectively sleeved and connected to the connecting member. A metal sheet group is fixed to the inner wall of each housing.

4. A planar lens according to claim 2 or 3, characterised in that: Each group of metal sheet groups is respectively arranged on a dielectric plate, and the dielectric plate is installed in the installation space.

5. A planar lens according to claim 4, wherein: There are two installation surfaces in the installation space. The two installation surfaces are arranged opposite to each other. The two groups of metal sheet groups correspond to the two installation surfaces. The dielectric plate where the metal sheet group is located is installed on the installation surface, and there is also a backing plate between the installation surface and the dielectric plate.

6. A planar lens according to claim 3, wherein: The connecting member is a frame-shaped structure, and at least two connecting ears are further provided on the periphery of the connecting member.

7. A high-gain array antenna comprising a mounting plate on which is mounted a dipole array comprising a plurality of dipoles; characterized by: Each oscillator is provided with a lens in its main radiation direction. The lens is the planar lens described in claim 1. The plane where each group of metal sheets of the lens is located is perpendicular to the main radiation direction of the oscillator.

8. A high-gain array antenna according to claim 7, characterized in that: The oscillator is a dual-polarized oscillator. The four metal sheets of each group of metal sheets of the lens overlap with the four oscillator arms of the oscillator in the orthographic projection on the mounting plate one-to-one.

9. A high-gain array antenna according to claim 7, characterized in that: The working wavelength of the oscillator is λ. Each metal sheet of the lens has a square contour, and the side length of the metal sheet is in the range of 0.2λ to 0.24λ.

10. A high-gain array antenna according to claim 7 or 9, characterized in that: The working frequency of the oscillator is in the range of 0.6 GHz to 1 GHz. The distance D1 between the planes where different groups of metal sheets of the lens are located is in the range of 60 mm to 70 mm. The distance D2 between adjacent metal sheets of the same group of metal sheets is in the range of 6 mm to 10 mm. Each metal sheet has a square contour, and the side length L1 of the metal sheet is in the range of 75 mm to 90 mm.

11. A high-gain array antenna according to claim 7 or 9, characterized in that: The working frequency of the oscillator is in the range of 1.695 GHz to 2.69 GHz. The distance between the planes where different groups of metal sheets of the lens are located is in the range of 24 mm to 28 mm. The distance between adjacent metal sheets of the same group of metal sheets is in the range of 2.5 mm to 4 mm. Each metal sheet has a square contour, and the side length of the metal sheet is in the range of 30 mm to 36 mm.

12. A high-gain array antenna according to claim 7 or 9, characterized in that: The oscillator includes a low-frequency oscillator unit and a medium-frequency oscillator unit. The medium-frequency oscillator unit is nested inside the low-frequency oscillator unit. The working frequency of the medium-frequency oscillator unit is in the range of 1.695 GHz to 2.69 GHz. The lens is in the main radiation direction of the medium-frequency oscillator unit and is completely or partially inside the low-frequency oscillator unit. The distance D3 between the planes where different groups of metal sheets of the lens are located is in the range of 24 mm to 28 mm. The distance D4 between adjacent metal sheets of the same group of metal sheets is in the range of 2.5 mm to 4 mm. Each metal sheet has a square contour, and the side length L2 of the metal sheet is in the range of 30 mm to 36 mm.

Images