CN106953173B - Dual-polarized antenna isolation device and method - Google Patents
Dual-polarized antenna isolation device and method Download PDFInfo
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- CN106953173B CN106953173B CN201710099341.2A CN201710099341A CN106953173B CN 106953173 B CN106953173 B CN 106953173B CN 201710099341 A CN201710099341 A CN 201710099341A CN 106953173 B CN106953173 B CN 106953173B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
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- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
- H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
- H01Q1/525—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas between emitting and receiving antennas
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Abstract
The embodiment of the application discloses a dual-polarized antenna isolation device and a dual-polarized antenna isolation method, which achieve the purpose that a transmitting and receiving end can simultaneously use a dual-polarized antenna to receive and transmit signals on the premise of ensuring that full-duplex transmitting and receiving ends positioned at the same wireless access point are isolated. The device comprises a first signal transmitting end, a first signal receiving end and an isolation unit; the first signal transmitting end and the first signal receiving end are positioned in the same wireless access point and both adopt dual-polarized antennas; the isolation unit is positioned on an energy coupling path between the first signal transmitting end and the first signal receiving end and used for blocking the electromagnetic energy generated by the first signal transmitting end from flowing to the first signal receiving end; the energy coupling path is a path through which electromagnetic energy generated by the first signal transmitting end flows to the first signal receiving end when the first signal transmitting end and the first signal receiving end both work in two polarization directions of respective dual-polarized antennas.
Description
Technical Field
The present application relates to the field of communications, and in particular, to a dual-polarized antenna isolation apparatus and method.
Background
A Co-frequency simultaneous Full Duplex (CCFD) system is a two-way communication system that uses the same frequency and transmits and receives simultaneously. CCFD transceiver systems generally consist of a receiver and a transmitter. For a CCFD transceiving system, the isolation of transceiving is an important indicator of the system operation. If the receiving and transmitting isolation of the system is poor, the receiver is interfered when the transmitter transmits, and even the self-oscillation of the receiver can be caused to fail to work normally. Especially in high power conditions, even damage to the receiver front-end amplifier can result.
The prior art uses different polarizations to isolate the transmitter and receiver of a CCFD transceiver system. The disadvantage is also apparent that the transceivers each can use antennas of only one polarization at a time, so that the transmission efficiency of the information is low.
Disclosure of Invention
In order to solve the technical problems in the prior art, the application provides a dual-polarized antenna isolation method and device, which achieve the purpose that the receiving and transmitting ends can simultaneously use the dual-polarized antenna to receive and transmit signals on the premise of ensuring that the full-duplex receiving and transmitting ends located in the same wireless access point are isolated.
The application provides a dual-polarized antenna isolation device, which comprises a first signal transmitting end, a first signal receiving end and an isolation unit;
the first signal transmitting end and the first signal receiving end are positioned in the same wireless access point and both adopt dual-polarized antennas, the first signal transmitting end is used for transmitting signals in a full-duplex mode, and the first signal receiving end is used for receiving signals in the full-duplex mode;
the isolation unit is located on an energy coupling path between the first signal transmitting end and the first signal receiving end and used for blocking electromagnetic energy generated by the first signal transmitting end from flowing to the first signal receiving end; the energy coupling path is a path through which electromagnetic energy generated by the first signal transmitting terminal flows to the first signal receiving terminal when the first signal transmitting terminal and the first signal receiving terminal both work in two polarization directions of respective dual-polarized antennas at the same time.
Optionally, the isolation unit is specifically located in a region where the radiation edge of the first signal transmitting end and the radiation edge of the first signal receiving end intersect.
Optionally, the isolation unit is specifically located in an area where the electromagnetic energy meets a preset energy condition on an energy coupling path between the first signal transmitting end and the first signal receiving end.
Optionally, the 3dB beam width of the antenna pattern of the first signal transmitting end and the 3dB beam width of the antenna pattern of the first signal receiving end partially or completely coincide with each other in a coverage area of the ground.
Optionally, the isolation unit includes:
an electromagnetic field bandgap cell, a frequency selective surface and/or an electromagnetic absorption cell.
Optionally, the electromagnetic energy isolation capability of the isolation unit is determined according to the signal transmitting power of the first signal transmitting terminal in the preset frequency range, the actual signal receiving power of the first signal receiving terminal without adding the isolation unit, and the target signal receiving power of the first signal receiving terminal with adding the isolation unit.
Optionally, the apparatus further comprises:
the wireless access point comprises a second signal transmitting end and a second signal receiving end, wherein the second signal transmitting end is used for transmitting signals in a half-duplex mode, the second signal receiving end is used for receiving signals in the half-duplex mode, and the second signal transmitting section and the second signal receiving end are located in the wireless access point.
The application also provides a dual-polarized antenna isolation method, which comprises the following steps:
acquiring an energy coupling path between a first signal transmitting end and a first signal receiving end when the first signal transmitting end transmits signals in a full duplex mode and the first signal receiving end receives signals in the full duplex mode; the first signal transmitting end and the first signal receiving end are located in the same wireless access point and both adopt dual-polarized antennas, and the energy coupling path refers to a path through which electromagnetic energy generated by the first signal transmitting end flows to the first signal receiving end when the first signal transmitting end and the first signal receiving end both adopt two polarization directions of the respective dual-polarized antennas to work simultaneously;
and arranging an isolation unit on the energy coupling path so that the isolation unit blocks the electromagnetic energy generated by the first signal transmitting end from flowing to the first signal receiving end.
Optionally, the method further includes:
determining a radiation edge of the first signal transmitting end and a radiation edge of the first signal receiving end;
the disposing of the isolation unit on the energy coupling path includes:
and arranging the isolation unit in an area where the radiation edge of the first signal transmitting end and the radiation edge of the first signal receiving end are intersected.
Optionally, the method further includes:
determining an area where electromagnetic energy meets a preset energy condition on an energy coupling path between the first signal transmitting end and the first signal receiving end;
the disposing of the isolation unit on the energy coupling path includes:
the isolation unit is disposed in the region.
Optionally, the 3dB beam width of the antenna pattern of the first signal transmitting end and the 3dB beam width of the antenna pattern of the first signal receiving end partially or completely coincide with each other in a coverage area of the ground.
Optionally, the isolation unit includes:
an electromagnetic field bandgap cell, a frequency selective surface and/or an electromagnetic absorption cell.
Optionally, the electromagnetic energy isolation capability of the isolation unit is determined according to the signal transmitting power of the first signal transmitting terminal in the preset frequency range, the actual signal receiving power of the first signal receiving terminal without adding the isolation unit, and the target signal receiving power of the first signal receiving terminal with adding the isolation unit.
The application also provides a dual polarized antenna isolation device, the device includes: the device comprises an energy coupling path acquisition unit and an isolation unit setting unit;
the energy coupling path acquiring unit is used for acquiring an energy coupling path between a first signal transmitting end and a first signal receiving end when the first signal transmitting end transmits signals in a full duplex mode and the first signal receiving end receives signals in the full duplex mode; the first signal transmitting end and the first signal receiving end are located in the same wireless access point and both adopt dual-polarized antennas, and the energy coupling path refers to a path through which electromagnetic energy generated by the first signal transmitting end flows to the first signal receiving end when the first signal transmitting end and the first signal receiving end both adopt two polarization directions of the respective dual-polarized antennas to work simultaneously;
the isolation unit setting unit is configured to set an isolation unit on the energy coupling path, so that the isolation unit blocks the electromagnetic energy generated by the first signal transmitting end from flowing to the first signal receiving end.
The following summarizes the beneficial effects of the embodiments of the present application:
in this embodiment, the isolation unit for blocking electromagnetic energy is disposed on the energy coupling path through which the electromagnetic energy generated by the first signal transmitting terminal, which adopts the dual-polarized antenna and works in the full-duplex mode, flows to the first signal receiving terminal, so that the purpose that the receiving and transmitting terminals can simultaneously use the dual-polarized antenna to receive and transmit signals is achieved on the premise that the full-duplex receiving and transmitting terminals of the same wireless access point are isolated.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of a dual-polarized antenna isolation device according to an embodiment of the present application;
fig. 2 is a schematic diagram of electromagnetic energy obtained by simulating the first signal transmitting terminal 101 and the first signal receiving terminal 102 according to a first embodiment of the present disclosure;
FIG. 3 is a schematic diagram of electromagnetic energy added to the EBG structure of FIG. 2 in accordance with one embodiment of the present invention;
FIG. 4 is a graph of frequency-isolation contrast in one embodiment of the present application;
fig. 5 is a schematic diagram of a main energy coupling path formed when a port of the first signal transmitting terminal 101 in the +45 ° direction transmits a signal in the first embodiment of the present application;
fig. 6(a) is a diagram illustrating an actual effect of two 2.6G transceiving dual-polarized antennas mounted on a chassis in a first embodiment of the present application;
fig. 6(b) is a diagram illustrating an actual effect of adding an EBG structure on a backplane according to a first embodiment of the present application;
fig. 7 is a schematic diagram of adding two antennas operating in a half-duplex mode to the remaining space of the backplane according to an embodiment of the present application;
fig. 8 is a flowchart of a dual-polarized antenna isolation method according to a second embodiment of the present application;
fig. 9 is a block diagram of a dual-polarized antenna isolation device according to a third embodiment of the present application.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.
The first embodiment is as follows:
referring to fig. 1, this figure is a schematic structural diagram of a dual-polarized antenna isolation device according to an embodiment of the present application.
The dual-polarized antenna isolation device provided by the embodiment comprises: a first signal transmitting terminal 101, a first signal receiving terminal 102 and an isolation unit 103.
The first signal transmitting terminal 101 and the first signal receiving terminal 102 are located in the same wireless access point. The wireless access point is a bridge for accessing a wireless core network or an Ethernet by a user and comprises a macro station, a small station and the like. The first signal transmitting terminal 101 and the first signal receiving terminal 102 may both be antennas.
The first signal transmitting terminal 101 is configured to transmit a signal using a dual-polarized antenna in a full-duplex mode, and the first signal receiving terminal 102 is configured to receive a signal using a dual-polarized antenna in the full-duplex mode. As described above, the full duplex mode is that the frequency of the signal transmitted by the first signal transmitting terminal 101 is the same as the frequency of the signal received by the first signal receiving terminal 102, and the time when the first signal transmitting terminal 101 transmits the signal is the same as the time when the first signal receiving terminal 102 receives the signal.
When the first signal transmitting terminal 101 transmits a signal, an electromagnetic wave radiated outwards is generated, wherein a part of energy of the electromagnetic wave flows to the first signal receiving terminal 102. The signal transmission method is characterized in that the signal transmission method is represented in a directional diagram, namely the 3dB beam width of the antenna directional diagram of the first signal transmission end and the 3dB beam width of the antenna directional diagram of the first signal receiving end are partially or completely overlapped in the coverage range of the ground. The antenna directional patterns (radiation patterns), also called radiation directional patterns, far-field directional patterns, etc., refer to patterns in which the relative field strength of a radiation field changes with direction at a certain distance from an antenna, and are usually represented by two mutually perpendicular plane directional patterns passing through the maximum radiation direction of the antenna, one plane directional pattern being in the horizontal direction and the other plane directional pattern being in the vertical direction. The 3dB beamwidth of the antenna pattern, also called beamwidth, refers to the main lobe width. The lobe width, as the name implies, is the angle at which the fan formed by the radio wave radiation opens. The radiation intensity in different directions of a radio wave emitted from the same antenna is different, so that the angle between two directions defined as 3dB reduction in power from the maximum radiation direction is the lobe width. There is one lobe width in each of the horizontal and vertical planes. The lobe in the direction of maximum energy density in the antenna pattern is called the main lobe, and the width of the main lobe is called the main lobe width. The lobe width of the antenna is related to the coverage range of the antenna on the ground, and the larger the lobe width is, the wider the radiation range is; the smaller the lobe width, the smaller the radiation range.
When the 3dB beam width of the antenna pattern of the first signal transmitting end and the 3dB beam width of the antenna pattern of the first signal receiving end are completely or partially overlapped in the coverage area of the ground, since the signal transmitted by the first signal transmitting end 101 and the signal received by the first signal receiving end 102 are the same and the same frequency, if the electromagnetic wave radiated outward by the first signal transmitting end 101 is received by the first signal receiving end 102, the interference to the first signal receiving end 102 for receiving the signal from the opposite-end wireless access point is caused.
In this embodiment, when the first signal transmitting end 101 and the first signal receiving end 102 both simultaneously adopt two polarization directions of their respective dual-polarized antennas to operate, a path of electromagnetic energy generated by the first signal transmitting end 101 flowing to the first signal receiving end 102 is referred to as an energy coupling path. The electromagnetic energy is the energy of electromagnetic waves.
In order to reduce the interference caused by the electromagnetic energy radiated from the first signal receiving terminal 102 by the first signal transmitting terminal 101, the present embodiment arranges an isolation unit 103 on the energy coupling path. The isolation unit 103 may be located at any position on the energy coupling path, and is configured to block electromagnetic energy generated by the first signal transmitting terminal 101 from flowing to the first signal receiving terminal 102. Taking fig. 1 as an example, in the figure, the first signal transmitting terminal 101 transmits signals by using a dual-polarized antenna in a-45 ° direction, and the first signal receiving terminal 102 receives signals by using a dual-polarized antenna in a +45 ° direction. The dashed line represents one of the energy coupling paths and the dashed arrow represents the direction of electromagnetic energy flow. The isolation unit 103 is disposed on an energy coupling path to block electromagnetic energy flowing from the first signal transmitting terminal 101 to the first signal receiving terminal 102, so that an interference signal received by the first signal receiving terminal 102 is reduced or even eliminated.
Since the first signal transmitting terminal 101 radiates electromagnetic waves in all directions, the energy coupling path may be many. Theoretically, in order to reduce the interference caused by the electromagnetic wave to the first signal receiving end 102 to the maximum, the isolation unit 103 may be used to block all energy coupling paths, but in this case, the area of the isolation unit 103 is large, and the cost is high. Because the energy on each energy coupling path is not the same, some energy coupling paths flow more electromagnetic energy, and some energy coupling paths flow less electromagnetic energy. In order to save materials and cost of the isolation unit 103, the isolation unit 103 may be disposed only on an energy coupling path along which more electromagnetic energy flows, for example, an energy coupling path along which electromagnetic energy flows to the first signal receiving terminal 102 along the radiation side of the first signal transmitting terminal 101 and the radiation side of the first signal receiving terminal 102. The radiating edge refers to the edge where the electromagnetic energy of the antenna escapes from the antenna and propagates away. The direction of the radiation edge of the first signal transmitting terminal 101 is the direction of the strongest transmitted electromagnetic energy, and the direction of the radiation edge of the first signal receiving terminal 102 is the direction of the strongest received electromagnetic energy.
Referring to fig. 2, the electromagnetic energy diagram obtained by simulating the first signal transmitting terminal 101 and the first signal receiving terminal 102 is shown, where a 3-port is a port of the first signal transmitting terminal 101 in a-45 ° direction, and a 2-port is a port of the first signal receiving terminal 102 in a +45 ° direction. The direction that 3 port radiation limit points to is the southeast direction, the direction that 2 port radiation limit points to is the northeast direction. In fig. 2, the lighter the color indicates the energy density of the electromagnetic energy, the lighter the color indicates the higher the energy density, and the darker the color indicates the lower the energy density, and it can be seen from the figure that, in the vicinity of the 3 ports, the direction in which the radiation edge points is lighter in color and higher in energy density, and the other directions are darker in color and lower in energy density; near the 2-port, the direction pointed by the radiating edge is lighter in color and higher in energy density, and the other directions are darker in color and lower in energy density. As can be seen from fig. 2, a part of electromagnetic energy radiated from the 3-port radiation side flows to the 2-port along the 2-port radiation side, forming an energy coupling path. In order to block the energy coupling path, an isolation cell EBG (Electromagnetic Band Gap) structure may be placed on the energy coupling path. The specific position of the EBG structure may be only on the OA segment, only on the OB segment, or may span both the OA segment and the OB segment, where point O is an intersection of the 3-port radiation edge and the 2-port radiation edge, point a is a starting point of the 3-port radiation edge, and point B is an end point of the 2-port radiation edge.
Referring to fig. 3, there is shown a schematic representation of electromagnetic energy added to the EBG structure of fig. 2, spanning both the OA and OB segments, i.e., the area where the EBG structure intersects the 3-port and 2-port radiating edges. Furthermore, as can be seen from fig. 3, the EBG structure blocks the energy coupling path of the electromagnetic energy flowing from the 3-port to the 2-port, and the electromagnetic energy near the 2-port, especially in the direction of the radiating edge, is greatly reduced (from light color to dark color).
Referring to fig. 4, which is a frequency-isolation contrast diagram, the x-axis of the graph represents the frequency of the 3-port transmit signal and the frequency of the 2-port receive signal; the y-axis represents isolation in dB, calculated as 10 × log (V2/V3), V3 is the voltage at 3 ports and V2 is the voltage at 2 ports.
The dotted line in fig. 4 represents the isolation corresponding to the frequency of the 3-port transmission signal or the frequency of the 2-port reception signal before the EBG structure is added in fig. 2; the solid line represents the isolation corresponding to the frequency of the 3-port transmission signal or the frequency of the 2-port reception signal after the EBG structure is added in fig. 3. As can be seen from the dotted line and the solid line, in the frequency interval (2.480GHz, 2.644GHz), the isolation is significantly reduced after the EBG structure is added, and reaches-47.50 db at the lowest, demonstrating that the degree of interference of the 2-port by the electromagnetic waves generated by the 3-port is effectively reduced after the EBG structure is added.
In fig. 2 and 3, the first signal transmitting terminal 101 transmits a signal at a port in the-45 ° direction (i.e., 3 ports), and the first signal receiving terminal 102 receives a signal at a port in the +45 ° direction (i.e., 2 ports). Since the first signal transmitting end 101 and the first signal receiving end 102 adopt dual-polarized antennas, that is, the first signal transmitting end 101 also transmits signals at a port in the +45 ° direction, and the first signal receiving end 102 receives signals at a port in the-45 ° direction, in this case, the electromagnetic energy distribution in fig. 2 and 3 is symmetrical about an axis of a connecting line between the first signal transmitting end 101 and the first signal receiving end 102, and the energy coupling path is also symmetrical about the axis. Referring to fig. 5, if fig. 1 is a simplified version of fig. 3, fig. 5 shows a main energy coupling path formed when the port of the first signal transmitting terminal 101 transmits a signal in the +45 ° direction, that is, a direction in which electromagnetic energy is directed from the radiating edge of the first signal transmitting terminal 101 in the +45 ° direction to the direction in which the radiating edge of the first signal receiving terminal 102 in the-45 ° direction is directed. The radiation unit 103 is disposed in a region where a radiation edge of the first signal transmitting end 101 in the +45 ° direction and a radiation edge of the first signal receiving end 102 in the-45 ° direction intersect.
Referring to fig. 6(a), the figure is a diagram showing an actual effect that two 2.6G transceiving dual-polarized antennas are installed on a bottom plate; referring to fig. 6(b), the figure shows the actual effect after the isolation unit is added on the bottom plate, and the isolation structure in the figure is referred to as an EBG structure.
In addition, the EBG structure mentioned above is one implementation of the isolation cell 103. The EBG, previously called Photonic Band Gap (pbbg), means that electromagnetic waves having a specific frequency Band composed of a periodic structure generate a stop Band characteristic, and in this embodiment, serve as blocking or intercepting of electromagnetic waves.
The isolation unit 103 may also be a Frequency Selective Surface (FSS), where the Frequency Selective Surface is a single-screen or multi-screen periodic array structure composed of a large number of passive resonance units, is composed of periodically arranged metal patch units or periodically arranged aperture units on a metal screen, and has a function of reflecting electromagnetic waves.
The isolation unit 103 may also be an electromagnetic absorption unit, i.e. composed of an electromagnetic absorption material, which can absorb the electromagnetic wave energy projected to its surface. According to the wave-absorbing principle, the wave-absorbing material can be divided into an absorption type and an interference type, the absorption type material per se absorbs and loses electromagnetic waves, and the basic types of the wave-absorbing material comprise an absorber with the complex permeability basically equal to the complex dielectric constant, a wide-screen absorber with gradually changed impedance and a thin-layer absorber for attenuating surface current; the interference mode is to cancel the electromagnetic wave on the surface of the wave-absorbing layer and the reflected wave with equal amplitude and opposite phase on the bottom layer.
It is understood that the three types of isolation units 103 mentioned above do not limit the present application, and those skilled in the art can select other types of isolation units according to the specific situation.
The electromagnetic energy isolation capability of the isolation unit 103 is determined according to the signal transmitting power of the first signal transmitting terminal in the preset frequency range, the actual signal receiving power of the first signal receiving terminal under the condition that the isolation unit is not added, and the target signal receiving power of the first signal receiving terminal under the condition that the isolation unit is added. The skilled person in the art can select different types of isolation units according to the requirements of different isolation capabilities, and if the same isolation unit is selected, different isolation capabilities can be realized according to different positions where the isolation unit is placed, the size and the structure of the isolation unit. As shown in fig. 3, the small squares of the EBG represent metal patches, and the metal patches and the backplane can be connected together by using metal short-circuit holes, and the more the small squares are, the stronger the isolation capability is; the fewer the small squares, the weaker the isolation capability. Furthermore, in fig. 3, the EBG is located across both OA and OB segments, and has a weaker isolation than it is on OA segment only and higher than it is on OB segment only because the intensity of electromagnetic energy on OA segment is higher than that on OB segment. Thus, the specific location where the isolation unit 103 is placed in the energy coupling path is determined according to the isolation capability, i.e. in the area where the electromagnetic energy meets the preset energy condition, which may be, for example, that the average electromagnetic energy value of the area is within a preset range, which matches the isolation capability. Taking the EBG structure as an example, the parameters such as the size of the metal patches, the gaps between the metal patches and the like of the EBG structure are designed according to the isolation capability of the EBG structure, and the specific methods include a plane wave expansion method (PWE), a finite difference time domain method (FDTD), a transmission line matrix method, an integral equation method, a finite element method and the like.
In addition, in this embodiment, the dual-polarized antenna isolation apparatus may further include a second signal transmitting end and a second signal receiving end, where the second signal transmitting end is configured to transmit a signal in a half-duplex mode, the second signal receiving end is configured to receive a signal in the half-duplex mode, and the second signal transmitting section and the second signal receiving end are located in the wireless access point. The so-called half-duplex mode is that only one of the second signal transmitting terminal and the second signal receiving terminal works at a time point, that is, if the second signal transmitting terminal transmits signals to an opposite terminal, the second signal receiving terminal suspends receiving signals; and if the second signal receiving end receives the signal from the opposite end, the second signal transmitting end stops transmitting the signal.
Referring to fig. 7, on the basis of fig. 6, by utilizing the advantage of the smaller area of the isolation unit 103, a 3.5GHz antenna and a 5.8GHz antenna are added to the remaining space of the backplane, and one of the two antennas may serve as a second signal transmitting end, and the other may serve as a second signal receiving end. That is, the dual-polarized antenna isolation device can simultaneously operate in full-duplex mode of 2.6GHz and half-duplex mode of 3.5GHz (future TDD band) and 5.8GHz (WIFI band). The function diversification of the device is realized.
The following summarizes the beneficial effects of the present embodiment:
1. in this embodiment, the isolation unit 103 for blocking electromagnetic energy is disposed on an energy coupling path through which electromagnetic energy generated by the first signal transmitting terminal 101 and operating in a full-duplex mode flows to the first signal receiving terminal 102, so that the purpose that the transmitting and receiving terminals can simultaneously use the dual-polarized antenna to receive and transmit signals is achieved on the premise that the full-duplex transmitting and receiving terminals of the same wireless access point are isolated.
2. In this embodiment, the isolation unit 103 may be disposed by selecting an energy coupling path with higher electromagnetic energy intensity, so as to achieve the purpose of reducing the area of the isolation unit 103, and thus the dual-polarized antenna isolation device is miniaturized.
3. In the embodiment, the second signal receiving terminal and the second signal transmitting terminal which work in the half-duplex mode are added, so that the function diversification of the device is realized.
Example two
Referring to fig. 8, this figure is a flowchart of a dual-polarized antenna isolation method according to a second embodiment of the present application.
The dual-polarized antenna isolation method provided by the embodiment comprises the following steps:
step S101: the method comprises the steps of obtaining an energy coupling path between a first signal transmitting end and a first signal receiving end when the first signal transmitting end transmits signals in a full duplex mode and the first signal receiving end receives signals in the full duplex mode.
The first signal transmitting end and the first signal receiving end are located in the same wireless access point and both adopt dual-polarized antennas.
The energy coupling path is a path through which electromagnetic energy generated by the first signal transmitting terminal flows to the first signal receiving terminal when the first signal transmitting terminal and the first signal receiving terminal both work in two polarization directions of respective dual-polarized antennas at the same time.
The energy coupling path can be used for performing simulation on the first signal transmitting end and the first signal receiving end through simulation software, acquiring the energy distribution of electromagnetic waves generated by the first signal transmitting end when transmitting signals, and then confirming the energy coupling path through the energy distribution. The simulation principle of the simulation software may be a quality method, a finite element method, etc., and this embodiment is not particularly limited.
As described in the first embodiment, the energy coupling path may be determined according to a radiation edge of the first signal transmitting end and a radiation edge of the first signal receiving end, the radiation edges of the first signal transmitting end and the first signal receiving end may be determined according to respective feeding points, and an edge near the feeding point is a radiation edge; for a complex model, the calculation can be performed by a full-wave analysis method.
Step S102: and arranging an isolation unit on the energy coupling path so that the isolation unit blocks the electromagnetic energy generated by the first signal transmitting end from flowing to the first signal receiving end.
In this embodiment, by obtaining the energy coupling path between the first signal transmitting end and the first signal receiving end when the first signal transmitting end transmits a signal in the full duplex mode and the first signal receiving end receives a signal in the full duplex mode, and then setting the isolation unit on the energy coupling path, the isolation unit blocks the electromagnetic energy generated by the first signal transmitting end from flowing to the first signal receiving end, so that the receiving and transmitting ends can both use the dual-polarized antenna to receive and transmit signals simultaneously on the premise of ensuring that the same full duplex receiving and transmitting end is isolated.
Optionally, the method further includes:
determining a radiation edge of the first signal transmitting end and a radiation edge of the first signal receiving end;
the disposing of the isolation unit on the energy coupling path includes:
and arranging the isolation unit in an area where the radiation edge of the first signal transmitting end and the radiation edge of the first signal receiving end are intersected.
Optionally, the method further includes:
determining an area where electromagnetic energy meets a preset energy condition on an energy coupling path between the first signal transmitting end and the first signal receiving end;
the disposing of the isolation unit on the energy coupling path includes:
the isolation unit is disposed in the region.
Optionally, the 3dB beam width of the antenna pattern of the first signal transmitting end and the 3dB beam width of the antenna pattern of the first signal receiving end partially or completely coincide with each other in a coverage area of the ground.
Optionally, the isolation unit includes:
an electromagnetic field bandgap cell, a frequency selective surface and/or an electromagnetic absorption cell.
Optionally, the electromagnetic energy isolation capability of the isolation unit is determined according to the signal transmitting power of the first signal transmitting terminal in the preset frequency range, the actual signal receiving power of the first signal receiving terminal without adding the isolation unit, and the target signal receiving power of the first signal receiving terminal with adding the isolation unit.
EXAMPLE III
Referring to fig. 9, this figure is a block diagram of a dual-polarized antenna isolation device according to a third embodiment of the present application.
The dual-polarized antenna isolation device provided by the embodiment comprises: an energy coupling path acquisition unit 201 and an isolation unit setting unit 202;
the energy coupling path obtaining unit 201 is configured to obtain an energy coupling path between a first signal transmitting end and a first signal receiving end when the first signal transmitting end transmits a signal in a full duplex mode and the first signal receiving end receives a signal in the full duplex mode; the first signal transmitting end and the first signal receiving end are located in the same wireless access point and both adopt dual-polarized antennas, and the energy coupling path refers to a path through which electromagnetic energy generated by the first signal transmitting end flows to the first signal receiving end when the first signal transmitting end and the first signal receiving end both adopt two polarization directions of the respective dual-polarized antennas to work simultaneously;
the isolation unit setting unit 202 is configured to set an isolation unit on the energy coupling path, so that the isolation unit blocks the electromagnetic energy generated by the first signal transmitting end from flowing to the first signal receiving end.
When introducing elements of various embodiments of the present application, the articles "a," "an," "the," and "said" are intended to mean that there are one or more of the elements. The terms "comprising," "including," and "having" are intended to be inclusive and mean that there may be additional elements other than the listed elements.
It should be noted that, as one of ordinary skill in the art would understand, all or part of the processes of the above method embodiments may be implemented by a computer program to instruct related hardware, where the computer program may be stored in a computer readable storage medium, and when executed, the computer program may include the processes of the above method embodiments. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, the method embodiments are substantially similar to the apparatus embodiments and therefore are described in a relatively simple manner, and reference may be made to some of the description of the apparatus embodiments for relevant points. The above-described apparatus embodiments are merely illustrative, and the units and modules described as separate components may or may not be physically separate. In addition, some or all of the units and modules may be selected according to actual needs to achieve the purpose of the solution of the embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
The foregoing is directed to embodiments of the present application and it is noted that numerous modifications and adaptations may be made by those skilled in the art without departing from the principles of the present application and are intended to be within the scope of the present application.
Claims (8)
1. A dual-polarized antenna isolation device is characterized by comprising a first signal transmitting end, a first signal receiving end and an isolation unit;
the first signal transmitting end and the first signal receiving end are positioned in the same wireless access point and both adopt dual-polarized antennas, the first signal transmitting end is used for transmitting signals in a full-duplex mode, and the first signal receiving end is used for receiving signals in the full-duplex mode;
the isolation unit is located on an energy coupling path between the first signal transmitting end and the first signal receiving end and used for blocking electromagnetic energy generated by the first signal transmitting end from flowing to the first signal receiving end; the energy coupling path is a path through which electromagnetic energy generated by the first signal transmitting end flows to the first signal receiving end when the first signal transmitting end and the first signal receiving end both work in two polarization directions of respective dual-polarized antennas, the energy coupling path is determined by simulating the electromagnetic energy transmitted by the first signal transmitting end and the electromagnetic energy received by the first signal receiving end, and the isolation unit is specifically located in an area where the energy coupling path between the first signal transmitting end and the first signal receiving end meets a preset energy condition and the electromagnetic energy meets a preset energy condition; the electromagnetic energy isolation capability of the isolation unit is determined according to the signal transmitting power of the first signal transmitting terminal in the preset frequency range, the actual signal receiving power of the first signal receiving terminal under the condition that the isolation unit is not added, and the target signal receiving power of the first signal receiving terminal under the condition that the isolation unit is added.
2. The apparatus of claim 1, wherein the 3dB beamwidth of the antenna pattern of the first signal transmitting end and the 3dB beamwidth of the antenna pattern of the first signal receiving end partially or completely coincide with each other in a ground coverage area.
3. The apparatus of claim 1, wherein the isolation unit comprises:
an electromagnetic field bandgap cell, a frequency selective surface and/or an electromagnetic absorption cell.
4. The apparatus of claim 1, further comprising:
the wireless access point comprises a second signal transmitting end and a second signal receiving end, wherein the second signal transmitting end is used for transmitting signals in a half-duplex mode, the second signal receiving end is used for receiving signals in the half-duplex mode, and the second signal transmitting section and the second signal receiving end are located in the wireless access point.
5. A dual-polarized antenna isolation method, the method comprising:
acquiring an energy coupling path between a first signal transmitting end and a first signal receiving end when the first signal transmitting end transmits signals in a full-duplex mode and the first signal receiving end receives signals in the full-duplex mode through simulation; the first signal transmitting end and the first signal receiving end are located in the same wireless access point and both adopt dual-polarized antennas, and the energy coupling path refers to a path through which electromagnetic energy generated by the first signal transmitting end flows to the first signal receiving end when the first signal transmitting end and the first signal receiving end both adopt two polarization directions of the respective dual-polarized antennas to work simultaneously;
determining an area where electromagnetic energy meets a preset energy condition on an energy coupling path between the first signal transmitting end and the first signal receiving end;
arranging the isolation unit in the area so that the isolation unit blocks the electromagnetic energy generated by the first signal transmitting end from flowing to the first signal receiving end; the electromagnetic energy isolation capability of the isolation unit is determined according to the signal transmitting power of the first signal transmitting terminal in the preset frequency range, the actual signal receiving power of the first signal receiving terminal under the condition that the isolation unit is not added, and the target signal receiving power of the first signal receiving terminal under the condition that the isolation unit is added.
6. The method of claim 5, wherein the 3dB beam width of the antenna pattern at the first signal transmitting end and the 3dB beam width of the antenna pattern at the first signal receiving end partially or completely coincide with each other in a ground coverage area.
7. The method of claim 5, wherein the isolation unit comprises:
an electromagnetic field bandgap cell, a frequency selective surface and/or an electromagnetic absorption cell.
8. A dual polarized antenna isolation device, said device comprising: the device comprises an energy coupling path acquisition unit and an isolation unit setting unit;
the energy coupling path acquiring unit is used for acquiring an energy coupling path between a first signal transmitting end and a first signal receiving end when the first signal transmitting end transmits signals in a full-duplex mode and the first signal receiving end receives signals in the full-duplex mode through simulation; the first signal transmitting end and the first signal receiving end are located in the same wireless access point and both adopt dual-polarized antennas, and the energy coupling path refers to a path through which electromagnetic energy generated by the first signal transmitting end flows to the first signal receiving end when the first signal transmitting end and the first signal receiving end both adopt two polarization directions of the respective dual-polarized antennas to work simultaneously;
the isolation unit setting unit is configured to determine an area where electromagnetic energy meets a preset energy condition on an energy coupling path between the first signal transmitting end and the first signal receiving end, and set the isolation unit in the area, so that the isolation unit blocks the electromagnetic energy generated by the first signal transmitting end from flowing to the first signal receiving end; the electromagnetic energy isolation capability of the isolation unit is determined according to the signal transmitting power of the first signal transmitting terminal in the preset frequency range, the actual signal receiving power of the first signal receiving terminal under the condition that the isolation unit is not added, and the target signal receiving power of the first signal receiving terminal under the condition that the isolation unit is added.
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| CN201710099341.2A CN106953173B (en) | 2017-02-23 | 2017-02-23 | Dual-polarized antenna isolation device and method |
| PCT/CN2017/112270 WO2018153129A1 (en) | 2017-02-23 | 2017-11-22 | Dual-polarized antenna isolation apparatus and method |
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| CN110208609B (en) * | 2019-05-31 | 2021-08-17 | Oppo广东移动通信有限公司 | Detection device and detection method thereof |
| CN113162251B (en) * | 2021-04-09 | 2024-05-17 | 华为数字能源技术有限公司 | Transmitting terminal, method and system for wireless charging |
| CN113076675B (en) * | 2021-04-12 | 2022-11-08 | 中国电子科技集团公司第三十三研究所 | Electromagnetic environment effect simulation design method for air cushion landing boat |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1567652A (en) * | 1999-01-27 | 2005-01-19 | 半导体射频系统公司 | Isolation improvement circuit for a dual-polarization antenna |
| US8686920B2 (en) * | 2010-05-28 | 2014-04-01 | The Regents Of The University Of Michigan | Miniaturized radio repeater |
| CN104054215A (en) * | 2011-12-08 | 2014-09-17 | 电气兴业株式会社 | Transmission/reception-separated polarization-shared antenna |
| CN106329151A (en) * | 2015-06-30 | 2017-01-11 | 华为技术有限公司 | Antenna array and network equipment |
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| EP1148583A1 (en) * | 2000-04-18 | 2001-10-24 | Era Patents Limited | Planar array antenna |
| JP2007166115A (en) * | 2005-12-12 | 2007-06-28 | Matsushita Electric Ind Co Ltd | Antenna device |
| CN106953173B (en) * | 2017-02-23 | 2020-04-28 | 上海华为技术有限公司 | Dual-polarized antenna isolation device and method |
-
2017
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1567652A (en) * | 1999-01-27 | 2005-01-19 | 半导体射频系统公司 | Isolation improvement circuit for a dual-polarization antenna |
| US8686920B2 (en) * | 2010-05-28 | 2014-04-01 | The Regents Of The University Of Michigan | Miniaturized radio repeater |
| CN104054215A (en) * | 2011-12-08 | 2014-09-17 | 电气兴业株式会社 | Transmission/reception-separated polarization-shared antenna |
| CN106329151A (en) * | 2015-06-30 | 2017-01-11 | 华为技术有限公司 | Antenna array and network equipment |
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