Antenna system

Abstract

The invention discloses an antenna system. The antenna system comprises a first radiation source, a second radiation source, a reflection device and a first transmission device. The direction of the emission port of the first radiation source and the direction of the emission port of the second radiation source are arranged oppositely along the same axis, and the reflection surface of the reflection device is arranged opposite to the first transmission device. Wherein the first radiation source is used for transmitting a first signal to the reflecting surface of the reflecting device; the reflecting device is used for reflecting the first signal to the annular transmission area of the first transmission device through the reflecting surface; the first transmission device is used for radiating the first signal reflected by the reflecting surface out of the antenna system through the annular transmission area; the second radiation source is used for emitting a second signal, and the second signal is radiated out of the antenna system through a region formed by the inner diameter of the annular transmission region. The common-caliber radiation of signals of different transmitting ports is realized, the radiation paths are mutually independent, and the radiation efficiency of the antenna system is improved.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of communications, and in particular, to an antenna system. Background Art

[0002] With the rapid development of wireless communication technology, the traffic pressure on the access network side is increasing day by day. The wireless transmission channel between the access network and the aggregation network needs to be further expanded to meet the continuous growth of data services. The large bandwidth advantage of the high frequency band is becoming more and more obvious, making the high frequency band represented by millimeter waves gradually become the main frequency band for microwave backhaul. However, although millimeter waves have the advantage of large bandwidth, they also face the problem of higher atmospheric attenuation, which may directly affect the communication distance of the backhaul link. Therefore, researchers use dual-transmit port antennas to transmit different signals to improve communication efficiency or capacity, thereby improving the communication performance of long-distance wireless backhaul.

[0003] However, the signals emitted by the two transmitting ports of the dual transmitting port antenna in the conventional technology may be coupled, and the isolation is not high, which may affect the radiation efficiency of the signals generated by the transmitting ports, and further may affect the radiation efficiency of the antenna system. Summary of the invention

[0004] The present application provides an antenna system for realizing co-aperture radiation of signals from different transmitting ports and independent radiation paths, thereby improving the radiation efficiency of the antenna system.

[0005] In the first aspect, the present application provides an antenna system, which includes a first radiation source, a second radiation source, a reflection device, and a first transmission device. The direction of the emission port of the first radiation source and the direction of the emission port of the second radiation source are arranged opposite to each other along the same axis, the reflection surface of the reflection device is arranged opposite to the first transmission device, the emission port of the first radiation source points to the reflection surface of the reflection device, and the first transmission device has an annular transmission area. When in use, the first radiation source is used to transmit a first signal to the reflection surface of the reflection device; the reflection device is used to reflect the first signal to the annular transmission area of ​​the first transmission device through the reflection surface; the first transmission device is used to radiate the first signal reflected by the reflection surface out of the antenna system through the annular transmission area; the second radiation source is used to transmit a second signal, and the second signal is radiated out of the antenna system through the area formed by the inner diameter of the annular transmission area.

[0006] In the present application, the direction of the emission port of the first radiation source and the direction of the emission port of the second radiation source are arranged opposite to each other along the same axis, and the two radiation sources emit in directions away from each other along the same axis. Among them, the first signal emitted by the first radiation source is reflected by the reflection device and then transmitted out of the antenna system through the annular transmission area of ​​the first transmission device, and at the same time, the second radiation source emits the second signal in the direction opposite to the emission port of the first radiation source, and radiates out of the antenna system through the area formed by the inner diameter of the annular transmission area. Therefore, the first signal and the second signal radiated from the antenna system finally have the same aperture and the radiation paths are independent of each other, which is conducive to avoiding strong coupling of signals (i.e., the first signal and the second signal) emitted from different radiation ports, and has high isolation, which is conducive to improving the radiation efficiency of signals (i.e., the first signal and the second signal) generated by different radiation sources.

[0007] Optionally, the first signal and the second signal have different wavelengths, which can also be understood as the first signal and the second signal belonging to different frequency bands. When the wavelengths of the first signal and the second signal are different or the first signal and the second signal belong to different frequency bands, the aforementioned antenna system realizes the common aperture radiation of signals of different frequency bands and the radiation paths are independent of each other, which not only has the advantage of saving antenna aperture, but also helps to avoid strong coupling of signals of different frequency bands generated by different radiation sources, has high isolation, and is conducive to improving the radiation efficiency of signals of different frequency bands generated by different radiation sources.

[0008] In a possible implementation, the first radiation source is a microwave radiation source, and the first signal is microwaves; the second radiation source is a wireless light radiation source, and the second signal is wireless light.

[0009] In this embodiment, since wireless light and microwaves have opposite channel characteristics, that is, wireless light has a stronger advantage in resisting rain attenuation, while microwaves have lower fog attenuation and snow attenuation levels, hybrid networking of microwaves and wireless light can achieve the benefits of channel complementarity and improve the communication performance of long-distance wireless backhaul. In addition, since the microwave radiation source and the wireless light radiation source have the same aperture and the radiation paths are independent of each other, the communication performance of long-distance wireless backhaul can be further improved while retaining the benefits of channel complementarity.

[0010] In another possible implementation, the first radiation source and the second radiation source are both microwave radiation sources, and the first signal and the second signal are both microwaves.

[0011] In this embodiment, the above antenna system is used to realize that microwaves emitted from different transmission ports have the same aperture and independent radiation paths. When the wavelength of the first signal is different from the wavelength of the second signal, the capacity of the communication system can be increased. When the wavelength of the first signal is the same as the wavelength of the second signal, not only the capacity of the communication system can be increased, but also the spectrum efficiency can be improved to achieve full-duplex communication.

[0012] Optionally, the wavelength of the first signal emitted by the first radiation source is greater than the wavelength of the second signal emitted by the second radiation source.

[0013] In this embodiment, in order to meet the mirror reflection condition, the roughness of the reflective surface is generally required to be 1 / 10 of the wavelength. In order to reduce the manufacturing difficulty of the reflective device, the first signal with a longer wavelength is configured to be reflected by the reflective device instead of the second signal with a shorter wavelength, which is conducive to reducing the manufacturing difficulty of the reflective surface of the reflective device.

[0014] In a possible implementation, the reflection surface is a surface of a rotating body formed by rotating the first curve with the axis as the rotation center, and the emission port of the first radiation source is located at the focus of the first curve.

[0015] In this embodiment, the first signal emitted by the first radiation source along the axis to the reflection surface diverges outward along the axis and is centrally symmetrical about the axis, and the transmission path of the first signal after being reflected by the reflection surface is also centrally symmetrical about the axis. Therefore, it is beneficial for the reflected first signal to be able to be transmitted to the annular transmission area of ​​the first transmission device, and then the reflected first signal can be smoothly radiated out of the antenna system through the annular transmission area.

[0016] In a possible implementation, the first curve is a part of an elliptic curve.

[0017] In a possible implementation, the emission port of the first radiation source is located at a first focus of the elliptic curve, and the first signal emitted by the first radiation source passes through a second focus of the elliptic curve after being reflected by the reflection surface.

[0018] In this embodiment, since the sum of the distances from any point on the elliptic curve to the two foci of the elliptic curve is a fixed value, the optical paths of the beams emitted from one of the foci of the elliptic curve in various directions are the same after being reflected on the elliptic curve and passing through the other focus. Therefore, it is beneficial to control the wavefronts radiated from the antenna system to be the same.

[0019] In a possible implementation, the first transmission device is used to project the first signal reflected by the reflection surface into a collimated signal, and the focus of the first transmission device coincides with the second focus of the elliptic curve.

[0020] In this implementation, the first signal passing through the second focus is facilitated to perform secondary radiation similar to a point source, so as to be collimatedly radiated out of the antenna system, thereby facilitating increasing the propagation distance of the first signal after being radiated out of the antenna system.

[0021] In a possible implementation, the antenna system further includes a second transmission device, the second transmission device is located within the area formed by the inner diameter of the first transmission device, the emission port of the second radiation source is located at the focus of the second transmission device, and the second transmission device is used to project the second signal emitted by the second radiation source into a collimated signal.

[0022] In this implementation, the second signal can be radiated out of the antenna system in a collimated manner, thereby facilitating increasing the propagation distance of the second signal after being radiated out of the antenna system.

[0023] In a possible embodiment, the antenna system also includes a first supporting device, which is used to support the reflecting device and the first transmitting device respectively through two oppositely arranged end faces, the reflecting device is located at the first end face of the two oppositely arranged end faces, and the first transmitting device is located at the second end face of the two oppositely arranged end faces; the periphery of the first transmitting device is connected to the periphery of the second end face.

[0024] In this embodiment, the reflection device and the first transmission device are fixed by the first supporting device, which is beneficial to maintaining the structural stability of the antenna system and avoiding changes in the radiation path that affect the radiation efficiency of the first signal and the second signal.

[0025] In a possible implementation, the antenna system further includes a second supporting device, and the second supporting device is used to support the first radiation source and the second radiation source coaxially.

[0026] In this embodiment, the first radiation source and the second radiation source are kept coaxial by the second supporting device, so as to prevent the reflected first signal from overflowing the annular transmission area of ​​the first transmission device, and to prevent the second signal emitted by the second radiation source from overflowing the area formed by the inner diameter of the annular transmission area, thereby facilitating the improvement of the isolation between the first signal and the second signal, and thus improving the radiation efficiency of the antenna system.

[0027] In a possible implementation, the first supporting device is a cylindrical shell, a bowl-shaped shell or a dish-shaped shell.

[0028] In this embodiment, the first supporting device is configured as a shell shape such as a cylindrical shell, a bowl-shaped shell or a dish-shaped shell, which is beneficial for protecting the first radiation source and the second radiation source in the antenna system and preventing external factors such as wind and rain from interfering with the radiation source.

[0029] In a possible implementation, the first transmission device includes any one of a dielectric lens, a plane lens, and a metamaterial lens.

[0030] In a possible implementation, the second transmission device includes any one of a plano-convex lens, a Cassegrain lens, and a Gregorian lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1A A schematic diagram of an embodiment of the antenna system provided in the present application;

[0032] Figure 1B A schematic diagram of another embodiment of the antenna system provided in the present application;

[0033] Figure 2A An example diagram of a reflection device provided for this application;

[0034] Figure 2B Another example diagram of the reflection device provided for the present application;

[0035] Figure 3 A schematic diagram of another embodiment of the antenna system provided in the present application;

[0036] Figure 4 A schematic diagram of an embodiment of the support device provided in the present application;

[0037] Figure 5 A schematic diagram of another embodiment of the antenna system provided in the present application;

[0038] Fig. 6A An example diagram of the simulation results of the antenna system provided in this application;

[0039] Figure 6B Another example diagram of the simulation results of the antenna system provided in this application;

[0040] Fig. 7A An example diagram of a communication module provided for this application;

[0041] Figure 7B Another example diagram of the communication module provided in this application. DETAILED DESCRIPTION

[0042] The technical solutions 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 only part of the embodiments of the present application, rather than all the embodiments.

[0043] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable where appropriate, so that the embodiments described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0044] It should be understood that the term "and / or" in this article is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0045] The present application provides an antenna system for realizing co-aperture radiation of signals from different transmitting ports and independent radiation paths, thereby improving the radiation efficiency of the antenna system.

[0046] like Figure 1A FIG. 1 is a schematic diagram of an embodiment of the antenna system 00 provided in the present application.

[0047] like Figure 1A As shown in the cross-sectional view of the antenna system 00 on the left, the antenna system 00 mainly includes a first radiation source 01 , a second radiation source 02 , a reflection device 03 and a first transmission device 04 .

[0048] The first radiation source 01 and the second radiation source 02 are used to transmit communication signals respectively. The direction of the transmission port of the first radiation source 01 and the direction of the transmission port of the second radiation source 02 are arranged opposite to each other along the same axis, that is, the direction of the transmission port of the first radiation source 01 and the direction of the transmission port of the second radiation source 02 are placed in opposite directions along the same axis and the transmitted signals are far away from each other. For example, Figure 1A The emission port of the first radiation source 01 is placed to the left along the axis. Figure 1A The emission port of the second radiation source 02 is placed to the right along the axis. When the first radiation source 01 and the second radiation source 02 are working, the signal emitted by the first radiation source 01 (hereinafter referred to as the first signal) radiates to the left, that is, it is emitted in a direction away from the second radiation source 02 along the axis; the signal emitted by the second radiation source (hereinafter referred to as the second signal) radiates to the right, that is, it is emitted in a direction away from the first radiation source 01 along the axis.

[0049] In addition, the reflection surface of the reflection device 03 is arranged opposite to the first transmission device 04, wherein the reflection device 03 is located at the emission port side of the first radiation source 01, and the first transmission device 04 is located at the emission port side of the second radiation source 02. The emission port of the first radiation source 01 points to the reflection surface of the reflection device 03, so that the first signal emitted by the first radiation source 01 can be radiated in the direction of the first transmission device 04 after being reflected by the reflection device 03. Optionally, the reflection device 03, the first radiation source 01, the second radiation source 02 and the first transmission device 04 are coaxial.

[0050] In addition, if Figure 1A As shown in the side view of the first transmission device 04 on the right, the first transmission device 04 has an annular transmission area (i.e., an area extending from the inner diameter to the outer diameter). The annular transmission area is made of a transparent medium. The annular transmission area can pass the first signal, that is, the first signal reflected by the reflective surface of the reflective device 03 can radiate out of the antenna through the annular transmission area after reaching the annular transmission area. In addition, the area formed by the inner diameter of the annular transmission area can pass the second signal, and the first signal does not pass through the area formed by the inner diameter of the first transmission structure 04. The area formed by the inner diameter can be made of a transparent medium or can be hollow. Exemplarily, if the area formed by the inner diameter is hollow, the first transmission device 04 is an annular lens; if the area formed by the inner diameter is made of a transparent medium, the first transmission device 04 is a multi-structure lens. Exemplarily, the first transmission device 04 can be implemented in any manner such as a dielectric lens, a plane lens, or a metamaterial lens.

[0051] Exemplarily, when the antenna system 00 is working, the first radiation source 01 transmits a first signal to the reflecting surface of the reflecting device 03; the reflecting device 03 reflects the first signal to the annular transmission area of ​​the first transmission device 04 through the reflecting surface; the first transmission device 04 radiates the first signal reflected by the reflecting surface out of the antenna system 00 through the annular transmission area; at the same time, the second radiation source 02 transmits a second signal, and the second signal is radiated out of the antenna system 00 through the area formed by the inner diameter of the annular transmission area.

[0052] In this embodiment, the direction of the emission port of the first radiation source 01 and the direction of the emission port of the second radiation source 02 are arranged opposite to each other along the same axis, and the two radiation sources emit in directions away from each other along the same axis. Among them, the first signal emitted by the first radiation source 01 is reflected by the reflection device 03 and then transmitted out of the antenna system 00 through the annular transmission area of ​​the first transmission device 04, and at the same time, the second radiation source 02 emits the second signal in the opposite direction to the emission port of the first radiation source 01, and radiates out of the antenna system 00 through the area formed by the inner diameter of the annular transmission area. Therefore, the first signal and the second signal radiated from the antenna system 00 finally have the same aperture and independent radiation paths, which is conducive to avoiding strong coupling of signals (i.e., the first signal and the second signal) emitted from different radiation ports, and has high isolation, which is conducive to improving the radiation efficiency of signals (i.e., the first signal and the second signal) generated by different radiation sources.

[0053] Optionally, the first signal and the second signal have different wavelengths, which can also be understood as the first signal and the second signal belonging to different frequency bands. When the wavelengths of the first signal and the second signal are different or the first signal and the second signal belong to different frequency bands, the antenna system 00 achieves the common aperture radiation of signals of different frequency bands and the radiation paths are independent of each other, which not only has the advantage of saving antenna aperture, but also helps to avoid strong coupling of signals of different frequency bands generated by different radiation sources, has high isolation, and is conducive to improving the radiation efficiency of signals of different frequency bands generated by different radiation sources.

[0054] It should be noted that after the first signal and the second signal are radiated out of the antenna system 00, the radiation direction of the second signal may be the same as or different from the radiation direction of the first signal, and the present application does not limit this.

[0055] Optional, such as Figure 1B As shown, the antenna system 00 further includes a second transmission device 05, which is located in the area formed by the inner diameter of the annular transmission area of ​​the first transmission device 04, that is, the diameter of the second transmission device 05 is less than or equal to the inner diameter of the annular transmission area of ​​the first transmission device 04. Optionally, the first transmission device 04 is coaxial with the second transmission device 05. Optionally, the first transmission device 04 is coplanar with the second transmission device 05. Optionally, the emission port of the second radiation source 04 is located at the focus of the second transmission device 05, and the second transmission device 05 is used to project the second signal emitted by the second radiation source 02 into a collimated signal. Optionally, the second transmission device 05 is also used to perform beam expansion processing on the second signal emitted by the second radiation source 02. Exemplarily, the second transmission device 05 can be implemented in any manner such as a plano-convex lens, a Cassegrain lens, a Gregorian lens, etc.

[0056] It should be noted that the first transmission device 04 and the second transmission device 05 can be implemented in an integrated form, that is, the function of the first transmission device 04 and the transmission function of the second transmission device 05 are integrated on a multi-structure lens. For example, the area formed by the inner diameter of the first transmission device 04 is not hollow, the annular transmission area of ​​the first transmission device 04 is made of a transparent medium, the area formed by the inner diameter of the annular transmission area is also made of a transparent medium, and the focal length of the annular transmission area is different from the focal length of the area formed by the inner diameter of the annular transmission area. For example, the focal length of the annular transmission area is configured to enable the first signal reflected by the reflection surface to be collimated and radiated out of the antenna system 00, and the focal length of the area formed by the inner diameter of the annular transmission area is configured to enable the second signal emitted by the second radiation source 02 to be collimated and radiated out of the antenna system 00.

[0057] Furthermore, the specific structure of the reflection device 03 is introduced below:

[0058] In the present application, the reflection surface is the surface of a rotating body formed by the first curve rotating with the axis as the rotation center. The emission port of the first radiation source 01 is located at the focus of the first curve, and the first signal emitted by the first radiation source 01 along the axis to the reflection surface diverges outward along the axis and is centrally symmetrical with the axis. The transmission path of the first signal after being reflected by the reflection surface is also centrally symmetrical with the axis.

[0059] In a possible implementation, Figure 2A or Figure 2B As shown, the first curve is a part of the elliptic curve. The transmitting port of the first radiation source 01 is located at the first focus (i.e., f1) of the elliptic curve, and the first signal emitted by the first radiation source 01 passes through the second focus (i.e., f2) of the elliptic curve after being reflected by the reflecting surface. Since the sum of the distances from any point on the elliptic curve to the two foci of the elliptic curve is a fixed value, the optical paths of the beams emitted in various directions from one of the foci of the elliptic curve are the same after being reflected on the elliptic curve and passing through the other focus. Therefore, it is beneficial to control the wavefronts radiated from the antenna system to be the same.

[0060] Since the first signal emitted by the first radiation source 01 is a cone-shaped beam signal, the reflection surface is the surface of a rotating body formed by the first curve rotating with the axis as the rotation center, and the first signal passes through the second focus (i.e., f2) of the elliptical curve after being reflected by the reflection surface, the first signal reflected by the reflection surface forms a circle in the first plane perpendicular to the axis (i.e., the plane passing through the second focus and perpendicular to the axis). The first signal reflected by the reflection surface will continue to radiate in the direction of the first transmission device 04 after passing through the first plane. In addition, if Figure 2A or Figure 2BAs shown, the focus of the first transmission device 04 coincides with the second focus of the elliptic curve, so the first signal reaching the first transmission device 04 will be collimated and radiated out of the antenna system 00. It can also be understood that the reflection device 03 transforms the spherical wave of the point radiation of the first radiation source 01 into countless point sources through the reflection effect of the reflection surface, and the countless point sources are arranged in a ring, and then the countless point sources equivalent to the ring pass through the ring-shaped transmission area of ​​the first transmission device 04 for secondary radiation, so as to be radiated from the aperture of the antenna system 00.

[0061] In one example, by adjusting the parameters of the elliptic curve (e.g., the major axis and the minor axis), the angle between the major axis of the elliptic curve and the axis (i.e., the axis of the antenna system 00), and the distance between the geometric center of the first transmission device 04 and the transmission port of the first radiation source 01, the first signal emitted by the first radiation source 01 can be reflected by the reflection surface and all reach the annular transmission area of ​​the first transmission device 04. For example, Figure 2A As shown, the first curve is a curve segment ab, the endpoint b of the first curve intersects with the axis, and the reflecting surface is a regular curved surface with a concave surrounding the middle protrusion. The first signal emitted by the first radiation source 01 is a conical beam signal. The beam with the smallest angle with the axis in the first signal points to the endpoint b (that is, the beam propagating along the axis in the first signal), and the beam pointing to the endpoint b is reflected after reaching the endpoint b, and reaches the edge of the annular transmission area of ​​the first transmission device 04 close to the outer diameter after passing through the focus f2. The beam with the largest angle with the axis in the first signal points to the endpoint a, and the reflection path of the beam pointing to the endpoint a after reaching the endpoint a is parallel to the axis, and reaches the edge of the annular transmission area of ​​the first transmission device 04 close to the inner diameter after passing through the focus f2. In this example, the entire reflecting surface formed by the curve segment ab can receive the beam of the first signal and reflect the beam of the first signal.

[0062] In this example, by configuring appropriate parameters of the elliptic curve (e.g., the major axis and the minor axis), the angle between the major axis of the elliptic curve and the axis (i.e., the axis of the antenna system 00), and the distance between the geometric center of the first transmission device 04 and the transmitting port of the first radiation source 01, the first signal emitted by the first radiation source 01 is reflected by the reflecting surface and reaches the annular transmission area of ​​the first transmission device 04 without overflowing outside the outer diameter of the annular transmission area or overflowing inside the inner diameter of the annular transmission area. This is conducive to improving the radiation efficiency of the first signal emitted by the first radiation source 01.

[0063] In another example, in addition to adjusting the parameters of the elliptic curve (e.g., the major axis and the minor axis), the angle between the major axis of the elliptic curve and the axis (i.e., the axis of the antenna system 00), and the distance between the geometric center of the first transmission device 04 and the transmission port of the first radiation source 01, the shape of the first signal emitted by the first radiation source 01 can also be adjusted, that is, the first signal is configured as a hollow conical divergent beam, so that the first signal emitted by the first radiation source 01 is reflected by the reflection surface and reaches the annular transmission area of ​​the first transmission device 04. For example, Figure 2B As shown, the first curve is a curve segment cde, the endpoint e of the first curve intersects with the axis, and the reflecting surface is a regular curved surface with a concave surrounding the middle protrusion. The first signal emitted by the first radiation source 01 along the axis is a hollow conical divergent beam, and the area of ​​the beam on the cross section perpendicular to the axis is a circular ring. There is no beam propagating along the axis in the first signal. The beam with the smallest angle with the axis in the first signal points to the endpoint d, and the beam after reaching the endpoint d passes through the focus f2 and reaches the edge of the annular transmission area of ​​the first transmission device 04 close to the outer diameter. The beam with the largest angle with the axis in the first signal points to the endpoint c, and the reflection path of the beam pointing to the endpoint c after reaching the endpoint c is parallel to the axis, and reaches the edge of the annular transmission area of ​​the first transmission device 04 close to the inner diameter after passing through the focus f2. In this example, in the curve segment cde, only the annular area corresponding to the curve segment cd (i.e., area 1 of the reflecting surface) can receive the beam of the first signal and reflect the beam of the first signal.

[0064] In this example, by adjusting the beam shape of the first signal, the first signal emitted by the first radiation source 01 is reflected by the reflection surface and reaches the annular transmission area of ​​the first transmission device 04 without overflowing outside the outer diameter of the annular transmission area or overflowing inside the inner diameter of the annular transmission area. This is conducive to the flexible adaptation of the first radiation source 01 and the antenna system 00, and further conducive to improving the radiation efficiency of the first signal emitted by the first radiation source 01.

[0065] Furthermore, the following is combined Figure 3 The supporting device involved in the antenna system 00 is introduced as follows:

[0066] like Figure 3As shown, the antenna system 00 further includes a first supporting device 06, and the first supporting device 60 is used to support the reflecting device 03 and the first transmitting device 04 respectively through two oppositely arranged end surfaces. Among them, the reflecting device 03 is located at the first end surface of the two oppositely arranged end surfaces (i.e., the end surface close to the first radiation source 01), and the first transmitting device 04 is located at the second end surface of the two oppositely arranged end surfaces (i.e., the end surface close to the second radiation source 02). Optionally, the diameter of the reflecting surface of the reflecting device 03 is less than or equal to the diameter of the first end surface; the outer diameter of the first transmitting device is less than or equal to the diameter of the second end surface. Exemplarily, the outer periphery of the first transmitting device 04 is connected to the outer periphery of the second end surface.

[0067] Optionally, the first support device 06 is a cylindrical shell, a bowl-shaped shell or a dish-shaped shell, and can be a support structure of other shapes, which is not limited here. Exemplarily, the cylindrical shell can be a cylinder or a polygonal cylinder (for example, a 12-sided cylinder, a 16-sided cylinder, etc.).

[0068] like Figure 4 As shown, taking the first supporting device 06 as a cylinder as an example, the cylinder has two oppositely arranged first end faces and second end faces, and the first end faces and the second end faces are both perpendicular to the axis of the cylinder. The first end face of the cylinder (i.e., the end face close to the first radiation source 01) is used to configure the reflection device 03, and the second end face of the cylinder (i.e., the end face close to the second radiation source 02) is used to configure the first transmission device 04. The circle determined by the outer diameter of the first transmission device 04 is connected to the circle determined by the diameter of the second end face.

[0069] In this embodiment, the reflection device and the first transmission device are fixed by the first supporting device, which is conducive to maintaining the structural stability of the antenna system and avoiding the radiation path change and affecting the radiation efficiency of the first signal and the second signal. In addition, the first supporting device is configured as a shell shape such as a cylindrical shell, a bowl-shaped shell or a dish-shaped shell, which is conducive to protecting the first radiation source and the second radiation source in the antenna system and avoiding interference to the radiation source caused by external factors such as wind and rain.

[0070] Optional, such as Figure 3 As shown, the antenna system 00 also includes a second supporting device 07, and the second supporting device 07 is used to support the first radiation source 01 and the second radiation source 02 coaxially. Optionally, the end surface of the second supporting device 07 close to the second radiation source 02 is used to support the second transmission device 05. Optionally, the second supporting device 07 can be a cylindrical shell, or a supporting structure of other shapes, which is not limited here. Exemplarily, the cylindrical shell can be a circular cylinder, or a polygonal cylinder (for example, a 12-sided cylinder, a 16-sided cylinder, etc.). Figure 3As shown, the second supporting device 07 is a cylinder, which is coaxial with the axis. The cylinder is used to accommodate the first radiation source 01 and the second radiation source 02, and the end surface close to the second radiation source 02 is used to support the second transmission device 05. The generatrix length of the cylinder is greater than the focal length of the second transmission device 05.

[0071] In this embodiment, the first radiation source and the second radiation source are kept coaxial by the second supporting device, so as to prevent the reflected first signal from overflowing the annular transmission area of ​​the first transmission device, and to prevent the second signal emitted by the second radiation source from overflowing the area formed by the inner diameter of the annular transmission area, thereby facilitating the improvement of the isolation between the first signal and the second signal, and thus improving the radiation efficiency of the antenna system.

[0072] Furthermore, the first radiation source 01 and the second radiation source 02 may be implemented in a variety of specific ways, which are described below respectively:

[0073] In a possible implementation, the first radiation source 01 is a microwave radiation source, the second radiation source 02 is a free space optical (FSO) radiation source, the first signal is a microwave, and the second signal is a wireless light. For example, the microwave can be a millimeter wave, a centimeter wave, a terahertz (THz) wave, etc., which are not limited here. For example, the wireless light can be an infrared laser or visible light, etc.

[0074] In this embodiment, since wireless light and microwaves have opposite channel characteristics, that is, wireless light has a stronger advantage in resisting rain attenuation, while microwaves have lower fog attenuation and snow attenuation levels, hybrid networking of microwaves and wireless light can achieve the benefits of channel complementarity and improve the communication performance of long-distance wireless backhaul. In addition, since the microwave radiation source and the wireless light radiation source have the same aperture and the radiation paths are independent of each other, the communication performance of long-distance wireless backhaul can be further improved while retaining the benefits of channel complementarity.

[0075] In another possible implementation, the first radiation source 01 and the second radiation source 02 are both microwave radiation sources. The first signal and the second signal are both microwaves.

[0076] In this embodiment, the aforementioned antenna system 00 is used to realize that microwaves emitted from different transmitting ports have the same aperture and independent radiation paths. When the wavelength of the first signal is different from the wavelength of the second signal, the capacity of the communication system can be increased. When the wavelength of the first signal is the same as the wavelength of the second signal, not only the capacity of the communication system can be increased, but also the spectrum efficiency can be improved to achieve full-duplex communication.

[0077] Optionally, the wavelength of the first signal emitted by the first radiation source 01 is greater than the wavelength of the second signal emitted by the second radiation source 02 .

[0078] In this embodiment, in order to meet the mirror reflection condition, the roughness of the reflection surface is generally required to be 1 / 10 of the wavelength. In order to reduce the manufacturing difficulty of the reflection device 03, the first signal with a longer wavelength is configured to be reflected by the reflection device 03, rather than the second signal with a shorter wavelength is configured to be reflected by the reflection device 03, which is conducive to reducing the manufacturing difficulty of the reflection surface of the reflection device 03.

[0079] For ease of understanding, Figure 5 As shown, the first radiation source 01 is a millimeter wave feed source, and the second radiation source 02 is a wireless optical radiation source. Figure 5 In the example shown, the millimeter wave feed source transmits millimeter waves to the millimeter wave reflection structure (i.e., an example of the reflection surface of the reflection device 03 described above) deployed at the rear end. After being reflected by the millimeter wave reflection structure, the millimeter wave reaches the annular millimeter wave lens (i.e., an example of the first transmission device 04 described above) deployed at the front end, and radiates out of the antenna system through the annular millimeter wave lens. At the same time, the wireless light radiation source transmits wireless light to the optical fiber beam expander (i.e., an example of the second transmission device 05 described above) located in the center of the millimeter wave lens, and the wireless light is radiated out of the antenna system after being collimated and expanded by the optical fiber beam expander.

[0080] like Fig. 6A and Figure 6B As shown, Figure 5 The schematic diagram of the simulation results of the antenna system shown in the figure. From the simulation results, it can be seen that since the millimeter wave feed source and the wireless optical radiation source have the same aperture and the radiation paths are independent of each other, that is, the energy radiated by the millimeter wave feed source and the wireless light emitted by the wireless optical radiation source are not blocked and lost, the millimeter waves and wireless light emitted by the antenna system can all be radiated out of the antenna system, so it has a higher aperture efficiency, can obtain a larger antenna gain and good directional performance.

[0081] It should be noted that under the condition of meeting certain structural size constraints, that is, without blocking the millimeter wave radiation path, Figure 5 The millimeter-wave feed source and wireless optical radiation source in the example shown can be integrated into a communication module, which is convenient for installation and removal from the central hollow of the millimeter-wave lens antenna.

[0082] In one example, Figure 5 The communication module integrating the millimeter wave feed source and the wireless optical radiation source in the example shown is as follows Fig. 7AAs shown. The communication module includes a radio frequency feeder (RF feeder) (i.e., a millimeter wave feeder), a transceiver (TRX), an analog digital converter and digital analog converter (DA / AD), a digital intermediate frequency (DIF) signal module, an intelligent switching module (intelligent switch), a semiconductor optical amplifier (semiconductor optical amplifier, SOA) and an optical fiber (optical fiber) port. The intelligent switching module is connected to a baseband module (e.g., an indoor baseband processing unit (building base band unit, BBU), etc.) via a common public radio interface (CPRI).

[0083] In another example, Figure 5 The communication module shown is as follows Figure 7B As shown. The communication module includes an RF feeder (i.e., a millimeter wave feeder), a radio frequency amplifier (PA), a photoelectric detector (PD), an intelligent switch module (intelligent switch), a semiconductor optical amplifier (SOA), and an optical fiber port. The intelligent switch module is connected to a baseband module (e.g., BBU, etc.) via a radio-over-fiber (RoF) interface.

[0084] In this embodiment, the millimeter wave feed source and the wireless optical radiation source have modular characteristics. When the antenna system is upgraded in function, the millimeter wave feed source and the wireless optical radiation source can be directly replaced, which is convenient for function upgrades or module updates.

[0085] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

Claims

1. An antenna system, characterized in that: include: A first radiation source, a second radiation source, a reflecting device and a first transmitting device, wherein the direction of the emission port of the first radiation source and the direction of the emission port of the second radiation source are arranged opposite to each other along the same axis, the reflecting surface of the reflecting device is arranged opposite to the first transmitting device, the emission port of the first radiation source points to the reflecting surface of the reflecting device, and the first transmitting device has an annular transmitting area; The first radiation source is used to transmit a first signal to a reflecting surface of the reflecting device; The reflecting device is used to reflect the first signal to the annular transmission area of ​​the first transmission device through the reflecting surface; The first transmission device is used to radiate the first signal reflected by the reflection surface out of the antenna system through the annular transmission area; The second radiation source is used to transmit a second signal, and the second signal is radiated out of the antenna system through the area formed by the inner diameter of the annular transmission area.

2. The antenna system according to claim 1, characterized in that The first radiation source is a microwave radiation source, and the first signal is microwave; the second radiation source is a wireless light radiation source, and the second signal is wireless light.

3. The antenna system according to claim 1 or 2, characterized in that: The reflecting surface is the surface of a rotating body formed by rotating the first curve with the axis as the rotation center, and the emission port of the first radiation source is located at the focus of the first curve.

4. The antenna system according to claim 3, characterized in that The first curve is a part of an elliptic curve.

5. The antenna system according to claim 4, characterized in that: The emission port of the first radiation source is located at the first focus of the elliptic curve, and the first signal emitted by the first radiation source passes through the second focus of the elliptic curve after being reflected by the reflection surface.

6. The antenna system according to claim 5, characterized in that: The first transmission device is used to project the first signal reflected by the reflection surface into a collimated signal, and the focus of the first transmission device coincides with the second focus of the elliptic curve.

7. The antenna system according to any one of claims 1 to 6, characterized in that: The antenna system also includes a second transmission device, which is located in the area formed by the inner diameter of the first transmission device. The emission port of the second radiation source is located at the focus of the second transmission device. The second transmission device is used to project the second signal emitted by the second radiation source into a collimated signal.

8. The antenna system according to any one of claims 1 to 7, characterized in that: The antenna system also includes a first supporting device, which is used to support the reflecting device and the first transmitting device respectively through two oppositely arranged end surfaces, the reflecting device is located at the first end surface of the two oppositely arranged end surfaces, and the first transmitting device is located at the second end surface of the two oppositely arranged end surfaces; the periphery of the first transmitting device is connected to the periphery of the second end surface.

9. The antenna system according to claim 8, characterized in that: The antenna system further comprises a second supporting device, wherein the second supporting device is used to support the first radiation source and the second radiation source coaxially.

10. The antenna system according to claim 8 or 9, characterized in that: The first supporting device is a cylindrical shell, a bowl-shaped shell or a dish-shaped shell.

11. The antenna system according to any one of claims 1 to 10, characterized in that: The first transmission device includes any one of a dielectric lens, a plane lens, and a metamaterial lens.

12. The antenna system according to claim 7, characterized in that The second transmission device includes any one of a plano-convex lens, a Cassegrain lens, and a Gregorian lens.

13. The antenna system according to any one of claims 1, 3 to 12, characterized in that: The first radiation source and the second radiation source are both microwave radiation sources, and the first signal and the second signal are both microwaves.

14. The antenna system according to claim 13, characterized in that The first signal and the second signal have different wavelengths.

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