Reflect array antenna and base station

Abstract

The present application relates to the field of antenna technology, and in particular to a reflective array antenna and a base station. The reflective array antenna comprises: a substrate and a plurality of reflective antenna units; the substrate has a first surface and a second surface arranged opposite to each other, the first surface has at least one mounting area, and each mounting area is provided with a plurality of reflective antenna units distributed in an array; each of the reflective antenna units comprises a diode, a phase shift delay line and a radiation patch group, one end of the diode is connected to the radiation patch group, the other end of the diode is connected to the phase shift delay line, and the phase shift delay line is used for grounding; the radiation patch group comprises at least two radiation patches arranged in the direction of the column. The reflective array antenna in the present application can meet the requirements of covering the blind area range, and can also reduce the use of active devices, thereby reducing the cost of the reflective array antenna.

Description

Technical Field

[0001] The present application relates to the field of antenna technology, and in particular to a reflective array antenna and a base station. Background Art

[0002] With the rapid development of the communications industry, the capacity of the communication system continues to increase, and the operating frequency band is getting higher and higher. In order to ensure the quality of communication, more base stations need to be added to increase the signal coverage range.

[0003] In the process of signal coverage of communication network, in order to reduce the number and cost of deployed base stations, reflective array antennas can be added to cover blind areas. However, when active reflective array is used for coverage, the active devices in the active reflective array will increase the cost.

[0004] Therefore, an antenna is urgently needed to solve the above problems. Summary of the invention

[0005] The present application provides a reflective array antenna that can meet the requirements of covering a blind area range and can also reduce the use of active devices, thereby reducing the cost of the reflective array antenna.

[0006] In the first aspect, the present application provides a reflective array antenna, comprising a substrate and a plurality of reflective antenna units, the substrate having a first surface and a second surface arranged relative to each other, wherein the relative arrangement of the first surface and the second surface can be understood as the first surface and the second surface being parallel to the extension direction of the substrate, and the projection of the first surface on the second surface coincides with the second surface; at least one mounting area is provided on the first surface, and a plurality of reflective antenna units distributed in an array are provided in each mounting area, wherein the direction of the rows of the reflective antenna units distributed in the array is the horizontal direction, and the direction of the columns of the reflective antenna units distributed in the array is the vertical direction; each reflective antenna unit may include a diode, a phase shift delay line and a radiation patch group, one end of the diode is connected to the radiation patch group, and the other end of the diode is connected to the phase shift delay line, and the phase shift delay line is used for grounding; the radiation patch group includes at least two radiation patches arranged along the column direction.

[0007] Since at least two radiation patches along the column direction are connected to one diode, the number of diodes used in the installation area of ​​equal area is reduced, thereby reducing the complexity and cost of the reflective array antenna. In addition, when the diode is in the on state, in the row direction (horizontal direction), each reflective antenna unit corresponds to one diode, thereby ensuring the coverage angle of the reflective array antenna in the row dimension (horizontal dimension), so that the reflective array antenna can cover the blind area.

[0008] The setting of the phase-shift delay line can change the length of the reflection antenna unit when the diode is in a closed state, thereby changing the reflection phase of the reflection antenna unit.

[0009] In some possible embodiments, the reflective array antenna also includes a DC bias line, which is disposed on the second surface of the substrate and connected to the radiation patch group. The DC bias line provides current input for the reflective antenna unit, so that current is introduced into the radiation patch group.

[0010] In some possible embodiments, in order to ensure that the current flowing into the radiation patch group is direct current, the reflective array antenna also includes a plurality of AC isolation units, and the AC isolation units are arranged one-to-one with the reflective antenna units. In a pair of reflective antenna units and AC isolation units, an AC isolation unit connects the DC bias line to the radiation patch of the corresponding reflective antenna unit. Due to the arrangement of the AC isolation unit, the AC resistor can be isolated to ensure that the current flowing into the radiation patch group is direct current, and in this manner, each column of reflective antenna units can correspond to a DC bias line, and a plurality of AC isolation units can be connected to a DC bias line, or each row of reflective antenna units can correspond to a DC bias line, and a plurality of AC isolation units can be connected to a DC bias line. Multiple DC bias lines are respectively connected to a power supply.

[0011] It should be noted that the AC isolation unit may specifically be a fan-shaped branch, or branches of other shapes, which are not listed here, as long as they can isolate the AC resistor.

[0012] In some possible embodiments, since the radiation patch is arranged on the first surface of the substrate and the DC bias line is located on the second surface of the substrate, when the AC isolation unit connects the DC bias line with the radiation patch, it needs to pass through the substrate. Therefore, in order to enable the AC isolation unit to be conveniently connected to the radiation patch, a plurality of metallized vias are formed on the substrate.

[0013] It should be noted that the number of the metallized vias is the same as the number of the reflective antenna units, and the metallized vias can be formed by etching.

[0014] In some possible embodiments, the substrate may specifically include a first dielectric layer substrate, a first floor panel and a second dielectric layer substrate, the first floor panel is arranged between the first dielectric layer substrate and the second dielectric layer substrate, and an end of the phase shift delay line away from the diode is connected to the first floor panel so that the reflective array antenna forms a loop.

[0015] In the process of forming metallized vias on the substrate, a plurality of first vias, a second via and a third via may be respectively provided on the first dielectric layer substrate, the second dielectric layer substrate and the first floor, and the plurality of first vias, the second vias and the third vias correspond to each other one by one to form metallized vias. In order to insulate the AC isolation unit from the first floor when passing through the metallized vias, an insulating material may be coated in the third via to prevent the AC isolation unit from contacting the first floor. The phase shift delay line needs to be connected to the first floor, therefore, a fourth via may be further provided on the first dielectric layer substrate to facilitate the phase shift delay line to pass through the fourth via to connect to the first floor.

[0016] Alternatively, when a plurality of first vias, second vias and third vias are specifically set, the aperture of the second via is set to be smaller than the aperture of the third via. In this way, when the AC isolation unit connects the DC bias line to the radiation patch group, the AC isolation unit needs to pass through the second via, the third via and the first via to connect to the radiation patch. Since the aperture of the second via is smaller than the aperture of the third via, in order to ensure that the AC isolation unit can pass through the second via, it is necessary to set the size of the portion of the AC isolation unit passing through the second via to be smaller than or equal to the aperture of the second via, and the aperture of the second via is smaller than that of the third via. In this way, when the portion of the AC isolation unit passing through the second via passes through the third via, it will not contact the third via (that is, it will not contact the first floor), thereby preventing the AC isolation unit from being connected to the first floor.

[0017] It should be noted that the first dielectric substrate, the first floor panel and the second dielectric layer substrate may be pressed together into a whole.

[0018] In some possible embodiments, the radiation patch group may include two radiation patches, the two radiation patches may be connected in series, one of the two radiation patches is connected to the AC isolation unit, the other of the two radiation patches is connected to one end of a diode, and the other end of the diode is grounded (connected to the first ground in the substrate) through a phase shift delay line so that each reflection antenna unit forms a loop.

[0019] It should be noted that the radiation patch group may include three or four radiation patches, and the number of radiation patches can satisfy that when the diode is disconnected or turned on, the reflection amplitude and reflection phase are within the set range, and horizontal scanning of plus or minus 60° and vertical scanning of plus or minus 10° can be performed.

[0020] In addition, the two radiation patches included in the radiation patch group may also be arranged in parallel.

[0021] In some possible embodiments, when the radiation patch is specifically set on the substrate, as long as the radiation patch can meet the coverage angle of the reflective array antenna in the horizontal dimension, so that the reflective array antenna can cover the blind area. Specifically, the angle between the radiation patch and the first surface of the substrate can be between 0°-180°. When setting, the radiation patch can be set parallel to the first surface of the substrate; or, the radiation patch can also be set perpendicular to the first surface of the substrate; or the radiation patch can also be set at 44°-46° to the first surface of the substrate. In the process of setting, the actual angle between the radiation patch and the first surface of the substrate may have a certain error with the set angle, and the error range may be between plus or minus 1-3°. For example, when the set angle between the radiation patch and the first surface of the substrate is 45°, the angle between the radiation patch and the first surface of the substrate can be any one of 42°, 43°, 44°, 45°, 46°, 47° or 48°.

[0022] Specifically, the radiation patch may be arranged at an angle of 45° with the substrate, or the radiation patch may be arranged on the first surface of the substrate in any form.

[0023] It should be noted that the radiation patch is made of metal; the radiation patch can be in a variety of shapes, for example: the radiation patch is rectangular, circular, diamond or elliptical, etc.

[0024] In some possible embodiments, there are multiple mounting areas disposed on the first surface of the substrate, and the multiple mounting areas may be arranged in a row direction, and along the row direction, the interval between two adjacent mounting areas is greater than the interval between two columns of reflective antenna units. The number of reflective antenna units on the first surface of the substrate is reduced, thereby reducing the number of active devices.

[0025] In a second aspect, the present application further provides a base station, which includes the reflective array antenna in any of the above technical solutions. In the reflective array, each reflective antenna unit includes at least two radiating patches arranged along the column direction, and at least two radiating patches arranged along the column direction are connected to a diode, so that the number of diodes used in the reflective array antenna is small, thereby reducing the cost of the reflective array antenna. Since the base station includes the reflective array antenna, the cost of the base station is also reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of a passive reflect array applied to a base station;

[0027] Figure 2 A schematic diagram of the structure of a reflect array antenna provided in this embodiment;

[0028] Figure 3 A schematic diagram of the structure of a radiation patch group in a reflect array antenna provided in an embodiment of the present invention;

[0029] Figure 4 A schematic diagram of another structure of the reflect array antenna provided in the present embodiment;

[0030] Figure 5 A schematic diagram of the structure of a DC bias line in a reflect array antenna provided in the present embodiment;

[0031] Figure 6 A schematic diagram of the structure of a substrate in a reflect array antenna provided in an embodiment of the present invention;

[0032] Figure 7 A simulation diagram of the reflection amplitude in the reflectarray antenna provided in the present embodiment;

[0033] Figure 8 A simulation diagram of the reflection phase in the reflectarray antenna provided in the present embodiment;

[0034] Fig. 9 Simulation of horizontal scanning of the reflect array antenna provided in this embodiment Figure 1 ;

[0035] Fig.10 Simulation of horizontal scanning of the reflect array antenna provided in this embodiment Figure 2 ;

[0036] Fig.11 Simulation of horizontal scanning of the reflect array antenna provided in this embodiment Figure 3 ;

[0037] Fig.12 A simulation diagram of vertical scanning of the reflectarray antenna provided in the present embodiment.

[0038] Reference numerals:

[0039] 10-substrate; 11-first dielectric substrate; 12-first floor; 13-second dielectric layer substrate; 20-reflection antenna unit; 21-radiation patch group; 210-radiation patch; 22-diode; 23-phase shift delay line; 30-DC bias line; 40-AC isolation unit. DETAILED DESCRIPTION

[0040] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings.

[0041] Currently, refer to Figure 1In order to improve the quality of communication and the range of signal coverage, more base stations need to be built. The more base stations are built, the more costs are required. In order to reduce the number of base stations and reduce costs, passive reflector array antennas can be added to cover blind spots. Specifically, a passive reflector array antenna is set at a set distance from the base station antenna, and the angle between the line connecting the passive reflector array antenna and the base station antenna and the horizontal plane is 20°. The passive reflector array antenna can reflect the signal of the base station antenna to the receiving device within the set distance and angle (40°), so that the receiving device can receive the signal.

[0042] However, the passive reflector array antenna in the above manner cannot achieve beam scanning and cannot meet the changing environmental requirements.

[0043] To this end, the present application provides a reflective array antenna that can meet the requirements of covering blind areas and can also perform beam scanning to adapt to changing environmental requirements.

[0044] The terms used in the following embodiments are only for the purpose of describing specific embodiments and are not intended to be limiting of the present application. As used in the specification and appended claims of the present application, the singular expressions "a", "an", "said", "above", "the" and "this" are intended to also include expressions such as "one or more", unless there is a clear contrary indication in the context.

[0045] References to "one embodiment" or "some embodiments" etc. described in this specification mean that a particular feature, structure or characteristic described in conjunction with the embodiment is included in one or more embodiments of the present application. Thus, the phrases "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear at different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0046] Reference Figure 2 and Figure 3The reflective array antenna provided in the embodiment of the present application includes a substrate 10 and a plurality of reflective antenna units 20. The substrate 10 has a first surface and a second surface arranged opposite to each other. A plurality of mounting areas are arranged on the first surface, and a plurality of reflective antenna units 20 distributed in an array are arranged in each mounting area. Each reflective antenna unit 20 includes a radiation patch group 21, a phase shift delay line 23 and a diode 22. One end of the diode 22 is connected to the radiation patch group 21, and the other end of the diode 22 is connected to the phase shift delay line 23. The phase shift delay line 23 is used for grounding. Specifically, referring to Figure 2 , the direction of the rows of the multiple reflective antenna units 20 distributed in an array is the horizontal direction, and the direction of the columns of the multiple reflective antenna units 20 in the array part is the vertical direction. The radiation patch group 21 can include at least two radiation patches 210 arranged along the column direction (vertical direction). When the diode 22 is in the on state, along the column direction, one diode can drive at least two radiation patches 210. Therefore, in the installation area of ​​equal area, the number of diodes 22 used can be reduced, thereby reducing the complexity and cost of the reflective array antenna. In addition, in the row direction (horizontal direction), each transmitting antenna unit 20 includes a diode. When the diode 22 is in the closed state, the signal also needs to pass through the distance of the phase shift delay line 23. Therefore, the reflective array antenna can be scanned at a predetermined angle in the horizontal direction to ensure that the reflective array antenna can cover a sufficient range.

[0047] It should be noted that the configuration of the phase shift delay line 23 can change the length of the reflection antenna unit 20 when the diode 22 is in a closed state, and further change the reflection phase of the reflection antenna unit 20, so that the reflection array antenna can reach a preset reflection phase.

[0048] Continue to refer to Figure 3 In some possible embodiments, the number of radiation patches 210 included in each radiation patch group 21 may be two, and the two radiation patches 210 may be connected in series. Among the two radiation patches 210 connected in series, one radiation patch 210 is connected to the diode 22, and the other radiation patch is used to access the current. When the number of radiation patches 210 in the radiation patch group 21 is two, and the two radiation patches 210 are connected in series, since the two radiation patches 210 are arranged in the column direction (vertical direction), in the row direction (horizontal direction), the two radiation patches 210 are in a row, therefore, in the row direction, the number of diodes is not reduced, so that the reflective array antenna can scan at a predetermined angle in the horizontal direction, so that the signal of the reflective array antenna covers the blind area.

[0049] It should be noted that there may be three or four radiating patches in the radiating patch group, as long as they can reflect the reflection phase and reflection amplitude of the array antenna in the working frequency band and can perform horizontal and vertical scanning at a preset angle.

[0050] Reference Figure 4 and Figure 5 In some possible embodiments, the reflective array antenna further includes a DC bias line 30, which is located on the second surface of the substrate, and is used to connect to the radiation patch group. Specifically, the DC bias line 30 can be arranged in the row direction or the column direction. When the DC bias line 30 is connected to a radiation patch 210 in the radiation patch group, a radiation patch group in each reflective antenna unit corresponds to an AC isolation unit 40, one end of the AC isolation unit 40 passes through the substrate and is connected to the radiation patch group located on the first surface of the substrate, and the other end of the AC isolation unit 40 is connected to the DC bias line 30, so that the current in the DC bias line 30 flows into the radiation patch group after passing through the AC isolation unit 40; because the reflective antenna unit requires DC power when working, an AC isolation unit 40 is provided between the DC bias line 30 and the radiation patch group to ensure that the current entering the radiation patch group is DC power. At this time, the diode 22 is closed, and the current entering the radiation patch group can pass through the diode 22 and the phase shift delay line 23 to the ground end to form a closed loop.

[0051] It should be noted that the AC isolation unit 40 may specifically be a fan-shaped branch (not limited to a fan-shaped one).

[0052] In the above embodiment, in order to facilitate the AC isolation unit to pass through the substrate and connect to the radiating patch group, a plurality of metallized vias are provided on the substrate, and the plurality of metallized vias are distributed in an array on the substrate, and each metallized via corresponds to a patch in the radiating patch group. When the DC bias line is connected to the radiating patch, one end of the AC isolation unit can be directly connected to the radiating patch in the radiating patch group by passing through the metallized via, thereby reducing the difficulty of installing the antenna.

[0053] Reference Figure 6In some possible embodiments, the substrate may specifically include a first dielectric layer substrate 11, a first floor 12, and a second dielectric layer substrate 13, wherein the first floor 12 is disposed between the first dielectric layer substrate 11 and the second dielectric layer substrate 13, and the first dielectric layer substrate 11, the first floor 12, and the second dielectric layer substrate 13 may be prepared by pressing. When a metallized via is formed on the substrate, since the first floor 12 is connected to the phase shift delay line, the first floor 12 serves as a ground terminal, and when the current is transmitted to the radiation patch group, the AC isolation unit needs to pass through the metallized via to connect to the radiation patch group. In order to prevent the current in the DC bias line from short-circuiting during the transmission process, the metallized via can be insulated from the first floor to prevent the AC isolation unit from contacting the first floor 12 when passing through the metallized via.

[0054] It should be noted that in the process of forming the metallized vias on the substrate, a plurality of first vias, a second via and a third via are respectively provided on the first dielectric layer substrate 11, the second dielectric layer substrate 13 and the first floor 12, and the plurality of first vias, the second vias and the plurality of third vias correspond to each other one by one to form the metallized vias. In order to insulate the AC isolation unit from the first floor 12 when passing through the metallized vias, an insulating material may be coated in the third via to prevent the AC isolation unit from contacting the first floor 12; or, the aperture of the second via is set to be smaller than the aperture of the third via, so that the AC isolation unit is insulated from the first floor 12 when passing through the metallized vias. When the line is connected to the radiation patch group, the AC isolation unit needs to pass through the second via, the third via and the first via to connect with the radiation patch. Since the aperture of the second via is smaller than the aperture of the third via, in order to ensure that the AC isolation unit can pass through the second via, the size of the part of the AC isolation unit passing through the second via needs to be smaller than or equal to the aperture of the second via, and the aperture of the second via is smaller than that of the third via. When the part of the AC isolation unit passing through the second via passes through the third via, it will not contact the third via (that is, it will not contact the first floor) to prevent the AC isolation unit from being connected to the first floor 12.

[0055] In addition, in order to connect the phase shift delay line with the first floor 12, and the phase shift delay line is located on the first surface side of the substrate, a plurality of fourth via holes can be provided on the first dielectric layer substrate 11, and the provision of the fourth via holes can facilitate the connection of the phase shift delay with the first floor 12.

[0056] In the above embodiments, when the radiation patch is specifically arranged on the first surface of the substrate, the radiation patch is arranged vertically on the first surface of the substrate, the radiation patch can also be arranged parallel to the first surface of the substrate, or the radiation patch can also be arranged at 45 degrees to the first surface of the substrate. As long as the reflective antenna array with the radiation patch can perform horizontal scanning, the signal coverage blind area coverage signal can be covered.

[0057] In addition, the radiation patch can be rectangular, diamond-shaped, circular, elliptical, etc., which are not listed here.

[0058] In order to better illustrate that the reflective antenna array in this scheme can reduce the diode (active device) while still meeting the coverage range, Figure 7 This is a reflection phase simulation diagram for example, where the number of radiation patches in the radiation patch group is two, the two radiation patches are connected in series, and the operating frequency band is 3.6 GHz-3.8 GHz. Figure 7 A simulation diagram of the reflection phase is taken as an example, in which the number of the radiation patches in the radiation patch group is two, the two radiation patches are connected in series, and the working frequency band is 3.6 GHz-3.8 GHz; and according to Figure 7 and Figure 8 It can be seen that the two series-connected radiation patches meet 180±20° in the working frequency band of 3.6GHz-3.8GHz, and the reflection loss in the working frequency band is less than 1dB.

[0059] Figure 9-11 This is a simulation diagram of horizontal ±60° scanning of the reflective antenna array. Fig.12 This is a simulation diagram of vertical ±10° scanning of the reflective antenna array. Figure 9-12 It can be seen that the horizontal beam of the reflectarray antenna can achieve 0°, ±10°, ±20°, ±30°, ±40°, ±50°, ±60° scanning; the vertical beam of the reflectarray antenna can achieve 0°, ±10° scanning. This shows that when the radiation patch group includes two radiation patches connected in series, the beam scanning of the formed reflectarray antenna in the horizontal and vertical directions can be scanned within a preset range, ensuring that the reflectarray antenna can meet the requirements of covering the blind area while reducing the use of active devices, thereby reducing the cost of the reflectarray antenna.

[0060] In some possible embodiments, the specific number of the mounting areas can be multiple, and the multiple mounting areas can be distributed at intervals along the row direction, wherein the intervals between two adjacent columns of reflective antenna units in each mounting area are the same, and along the row direction, the spacing between two adjacent mounting areas is greater than the spacing between two columns of reflective antenna units. In this way, setting multiple mounting areas on the first surface of the substrate can reduce at least one column of reflective antenna units, thereby reducing the number of active devices used.

[0061] In the specific implementation process, the number of radiation patches included in each radiation patch group can be two, and the two radiation patches can also be connected in parallel. In the two radiation patches connected in parallel, one end of each radiation patch is connected to a diode, and the other end of each radiation patch is used to access current. When the number of radiation patches in the radiation patch group is two, and the two radiation patches are connected in parallel, since the two radiation patches are arranged in the column direction (vertical direction), in the row direction (horizontal direction), the two radiation patches are in a row, therefore, in the row direction, the number of diodes is not reduced, so that the reflective array antenna can scan at a predetermined angle in the horizontal direction, so that the signal of the reflective array antenna covers the blind area.

[0062] In a second aspect, the present application further provides a base station, which includes the reflective array antenna in any of the above technical solutions. In the reflective array, each reflective antenna unit includes at least two radiating patches arranged along the column direction, and at least two radiating patches arranged along the column direction are connected to a diode, so that the number of diodes used in the reflective array antenna is small, thereby reducing the cost of the reflective array antenna. Since the base station includes the reflective array antenna, the cost of the base station is also reduced.

[0063] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A reflect array antenna, characterized in that: include: a substrate and a plurality of reflective antenna units; The substrate has a first surface and a second surface that are arranged opposite to each other, the first surface has at least one mounting area, and each mounting area is provided with a plurality of reflective antenna units distributed in an array; Each of the reflective antenna units includes a diode, a phase-shift delay line and a radiation patch group, one end of the diode is connected to the radiation patch group, the other end of the diode is connected to the phase-shift delay line, and the phase-shift delay line is used for grounding; Wherein, the radiation patch group includes at least two radiation patches arranged along the direction of the column; There are two radiation patches, which are connected in series, and one end of the diode is connected to the radiation patch at one end.

2. The reflectarray antenna according to claim 1, characterized in that: It also includes a DC bias line, which is arranged on the second surface of the substrate and is used to connect to the radiation patch located at the other end.

3. The reflectarray antenna according to claim 2, characterized in that: It also includes an AC isolation unit arranged in a one-to-one correspondence with the reflective antenna unit. In each pair of the reflective antenna unit and the AC isolation unit, each AC isolation unit connects the DC bias line to the radiation patch of the corresponding reflective antenna unit.

4. The reflectarray antenna according to claim 3, characterized in that: The substrate is provided with a plurality of metallized vias, and the AC isolation unit is connected to the radiation patch through the metallized vias.

5. The reflectarray antenna according to claim 4, characterized in that: The substrate comprises a first dielectric layer substrate, a first floor panel and a second dielectric layer substrate; The first floor panel is disposed between the first dielectric layer substrate and the second dielectric layer substrate.

6. The reflectarray antenna according to claim 5, characterized in that: The metallized via is insulated from the first ground floor.

7. The reflectarray antenna according to any one of claims 3 to 6, characterized in that: There are two radiation patches, one of which is connected to the diode, and the other is connected to the AC isolation unit.

8. The reflectarray antenna according to any one of claims 3 to 6, characterized in that: The AC isolation unit is a fan-shaped branch.

9. The reflectarray antenna according to any one of claims 1 to 6, characterized in that: The radiation patch is arranged parallel to the substrate; or, The radiation patch is arranged vertically to the substrate; or, The included angle between the radiation patch and the substrate is 44°-46°.

10. The reflectarray antenna according to any one of claims 1 to 6, characterized in that: The radiation patch is rectangular, circular or diamond-shaped.

11. The reflectarray antenna according to any one of claims 1 to 6, characterized in that: The first surface of the substrate has a plurality of mounting areas, and the plurality of mounting areas are arranged along a first direction. Along the first direction, a distance between each two adjacent mounting areas is greater than a distance between each two adjacent reflective antenna units.

12. A base station, characterized in that: The reflect array antenna comprises the reflect array antenna described in any one of claims 1 to 11.

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