WO2022160290A1 - Appareil de communication et procédé de communication - Google Patents

Appareil de communication et procédé de communication Download PDF

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Publication number
WO2022160290A1
WO2022160290A1 PCT/CN2021/074498 CN2021074498W WO2022160290A1 WO 2022160290 A1 WO2022160290 A1 WO 2022160290A1 CN 2021074498 W CN2021074498 W CN 2021074498W WO 2022160290 A1 WO2022160290 A1 WO 2022160290A1
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WIPO (PCT)
Prior art keywords
signal
unit
communication device
port
orthogonal
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PCT/CN2021/074498
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English (en)
Chinese (zh)
Inventor
顾爱军
陈泽峰
陈勇
郑德裔
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华为技术有限公司
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Priority to EP21921892.2A priority Critical patent/EP4258557A4/fr
Priority to PCT/CN2021/074498 priority patent/WO2022160290A1/fr
Publication of WO2022160290A1 publication Critical patent/WO2022160290A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/16—Auxiliary devices for mode selection, e.g. mode suppression or mode promotion; for mode conversion
    • H01P1/161—Auxiliary devices for mode selection, e.g. mode suppression or mode promotion; for mode conversion sustaining two independent orthogonal modes, e.g. orthomode transducer
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/06—Movable joints, e.g. rotating joints
    • H01P1/062—Movable joints, e.g. rotating joints the relative movement being a rotation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P5/00—Coupling devices of the waveguide type
    • H01P5/04—Coupling devices of the waveguide type with variable factor of coupling
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P5/00—Coupling devices of the waveguide type
    • H01P5/12—Coupling devices having more than two ports
    • H01P5/16—Conjugate devices, i.e. devices having at least one port decoupled from one other port
    • H01P5/18—Conjugate devices, i.e. devices having at least one port decoupled from one other port consisting of two coupled guides, e.g. directional couplers
    • H01P5/181—Conjugate devices, i.e. devices having at least one port decoupled from one other port consisting of two coupled guides, e.g. directional couplers the guides being hollow waveguides

Definitions

  • the present application relates to the field of communication, and, more particularly, to a communication device and a communication method.
  • a directional coupler is a four-port device that is widely used in microwave transmission systems. As shown in Figure 1, the four ports of the directional coupler include a common end, a main circuit end, a secondary circuit end and an isolation end, where the isolation end is inside the product and is not reflected externally.
  • the directional coupler can be divided into two types: balanced and unbalanced according to the energy ratio of the signal from the main circuit end and the secondary circuit end to the common end respectively. The proportion of energy to the common end is equal, and the energy proportion of the signal from the main circuit end and the auxiliary circuit end to the common end in an unbalanced directional coupler is not equal.
  • Commonly used coupling structures of existing directional couplers include broadside coupling structure, narrowside coupling structure and magic T structure.
  • the coupling amount of the directional coupler of the broad-side coupling structure and the narrow-side coupling structure is usually fixed. If the coupling amount needs to be adjusted, it is necessary to change the number, size, and distance of the coupling window to adjust the coupling amount. It is complicated and difficult to realize; while the coupling amount of the directional coupler with the magic T structure cannot be adjusted, and there is only one specification for the coupling amount of 3dB.
  • the coupling amount of the existing directional coupler is related to the frequency, and the operating frequency range is narrow, and the coupling amount will fluctuate to a certain extent within the frequency range, which is not stable enough.
  • the present application provides a communication device and a communication method, which can be used for power distribution or power synthesis of signals.
  • the coupling amount of the communication device can be adjusted, and the adjustment method is simple and easy to implement, and realizes the material normalization of balanced and unbalanced specifications.
  • the adjustment of the coupling amount of the communication device has nothing to do with the coupling window, and is not affected by the frequency change, which improves the flatness of the coupling amount of the communication device in the passband.
  • a communication device comprising: a first orthogonal unit, a second orthogonal unit and a rotating unit, a first end of the rotating unit is connected to the first orthogonal unit, the rotating unit The second end of the is connected to the second quadrature unit; the first quadrature unit is used to process the input first and second signals into quadrature third and fourth signals; the second The quadrature unit is configured to process the third signal and the fourth signal into a fifth signal and a sixth signal in quadrature; the rotation unit is configured to make the first quadrature unit and/or the first quadrature unit The two orthogonal units are rotated around the first direction to adjust the first angle between the third signal and the fifth signal in the first plane or the fourth signal and the sixth signal in the first plane , the first direction is the transmission direction of the third signal and the fourth signal from the first end of the rotating unit to the second end of the rotating unit, the first plane perpendicular to the first direction.
  • the rotation unit can control the rotation of the first orthogonal unit around the first direction, and/or control the rotation of the second orthogonal unit around the first direction, so as to adjust the The size of the first included angle, the size of the coupling amount of the communication device can be controlled by adjusting the size of the first included angle, that is, the fifth signal and the sixth signal can be adjusted by adjusting the size of the first included angle.
  • the energy proportional relationship between the third signal and the fourth signal, the communication device not only has a simple adjustment method of the coupling quantity, but also realizes the material normalization of the communication device of balanced specification and unbalanced specification.
  • unit is only an example, and may also be called a structure, a module, a device, etc., as long as the same or similar functions can be achieved, which is not limited in this application.
  • the first orthogonal unit and the second orthogonal unit are orthogonal mode couplers (orth-mode transducer, OMT), and the orthogonal mode coupler OMT functions
  • OMT orthogonal mode coupler
  • the orthogonal signals at the two branch ports of the orthogonal mode coupler are isolated from each other and transmitted to the common
  • the terminals are still orthogonal to each other and do not affect each other.
  • the realization form of the orthogonal mode coupler OMT in this application can be a conventional OMT, a broadband OMT, or an ultra-wideband OMT. In this application, the realization form of the orthogonal mode coupler OMT Do not make any restrictions.
  • the first quadrature unit includes: a first port for inputting the first signal; a second port for inputting the second signal signal; a third port for outputting the third signal and the fourth signal to the first end of the rotation unit; the second quadrature unit, comprising: a fourth port for outputting from the rotation unit The second end of the unit inputs the third signal and the fourth signal; the fifth port is used for outputting the fifth signal, and the fifth signal is based on the third signal, the fourth signal and the The first included angle is determined; the first included angle is the direction of the electric field of the signal transmitted through the first port and the third port at the third port and the direction of the electric field at the third port through the fifth port and the fourth port. The included angle of the electric field direction of the fourth port of the signal transmitted by the port.
  • the second quadrature unit further includes: a sixth port, where the sixth port is used to output the sixth signal, the sixth signal is based on The third signal, the fourth signal and the first included angle are determined.
  • the communication device in the present application is a directional coupler
  • the first port is the main circuit end of the directional coupler in the present application
  • the second port is the directional coupler in the present application
  • the third port is the common terminal #1 of the orthogonal unit docked inside the directional coupler of the application
  • the fourth port is the common terminal #2 of the orthogonal unit docked inside the directional coupler of the application
  • the first The fifth port is the common terminal #3 of the directional coupler of the application
  • the sixth port is the isolation terminal of the directional coupler of the application, wherein the isolation terminal is connected to the matching load to cancel the output signal of the sixth port.
  • the fifth signal includes a first component and a third component, and the first component is the third signal in the first included angle direction , the third component is the projection of the fourth signal in the direction of the first included angle;
  • the sixth signal includes a second component and a fourth component, and the second component is the third The projection of the signal in the second included angle direction, the fourth component is the projection of the fourth signal in the second included angle direction, the second included angle and the first included angle are complementary.
  • the conversion relationship between the first included angle ⁇ and the coupling amount Y of the communication device satisfies the following conditions:
  • Y 1 is the coupling amount of the first component to the third signal or the coupling amount of the fourth component to the fourth signal
  • sin ⁇ is the energy ratio of the second component to the third signal or the energy ratio of the third component to the fourth signal
  • Y 2 is the coupling amount of the second component to the third signal or the coupling of the third component to the fourth signal quantity.
  • the rotating unit can adjust the size of the energy ratio, that is, the size of the coupling amount, by adjusting the size of the first included angle ⁇ .
  • the adjustment method of the coupling amount is independent of the frequency, and the coupling amount is within the passband. Less fluctuation and high flatness within the passband.
  • the communication device in the present application includes a rotation angle scale that can rotate the first orthogonal unit and the second orthogonal unit, that is, the rotation angle scale corresponding to the first included angle, which is rotated to the corresponding angle in the current network.
  • the scale can be adjusted to the required coupling amount; or, the communication device in this application includes scales with different coupling amounts, and each coupling amount has a corresponding rotation angle inside the communication device, and the rotation angle is the same as the above-mentioned first clamp.
  • Angle correspondence directly adjust the communication device to the required coupling amount scale in the existing network.
  • the coupling amount adjustment method of the communication device in this application may be adjusted by the user according to actual needs, or automatically adjusted by the communication device according to a preset coupling amount, or may be preset in advance when leaving the factory.
  • the present application does not make any limitation on the specific adjustment mode of the coupling amount.
  • angles generated by rotating the first orthogonal unit and/or the second orthogonal unit can also be used for description, for example, the actual rotation of the first orthogonal unit and the second orthogonal unit respectively.
  • the first angle After the determination the above other included angles can also be uniquely determined according to the first included angle, which is not limited in the present application, and the calculation method of the other included angles is similar to the calculation method of the first included angle.
  • the first included angle ⁇ corresponding to a communication device with a coupling amount of 3dB is 45deg
  • the first included angle corresponding to a communication device with a coupling amount of 6dB ⁇ is 30deg.
  • the communication device by adjusting the size of the first included angle, the conversion between the balanced type and the unbalanced type can be realized, that is, the communication device of the balanced type and the unbalanced type can realize the material normalization.
  • the first quadrature unit includes an quadrature mode coupler OMT, and/or the second quadrature unit includes an quadrature mode coupler OMT.
  • the communication device provided by the present application compared with the conventional coupler, the communication device provided by the present application can extend the operating frequency range, and can realize wideband or even ultra-wideband.
  • a communication device comprising a first orthogonal unit, a second orthogonal unit and a rotating unit, a first end of the rotating unit is connected to the first orthogonal unit, and a first end of the rotating unit is connected to the first orthogonal unit.
  • the second end is connected to the second quadrature unit; the second quadrature unit is used to process the input seventh signal into an eighth signal, the eighth signal is perpendicular to the first direction, and the first direction is the transmission direction of the eighth signal transmitted from the second end of the rotating unit to the first end of the rotating unit; the first quadrature unit is used to process the eighth signal into an orthogonal first The ninth signal and the tenth signal; the rotation unit is used to rotate the first quadrature unit and/or the second quadrature unit around a first direction to adjust the eighth signal and the ninth signal At a first included angle within a first plane, the first plane is perpendicular to the first direction.
  • the rotation unit can control the rotation of the first orthogonal unit around the first direction, and/or control the rotation of the second orthogonal unit around the first direction, so as to adjust the
  • the size of the first included angle the size of the coupling amount of the communication device can be controlled by adjusting the size of the first included angle, that is, the ninth signal and the tenth signal can be adjusted by adjusting the size of the first included angle.
  • the energy ratio of the eight signals, the communication device not only has a simple adjustment method of the coupling amount, but also realizes the material normalization of the communication device of balanced specification and unbalanced specification.
  • unit is only an example, and may also be called a structure, a module, a device, etc., as long as the same or similar functions can be achieved, which is not limited in this application.
  • the first orthogonal unit and the second orthogonal unit are orthogonal mode couplers OMT
  • the function of the orthogonal mode coupler OMT is to separate a signal into two two orthogonally polarized signals or combine two orthogonally polarized signals into one signal
  • the orthogonal signals at the two branch ports of the orthogonal mode coupler are isolated from each other, and are still orthogonal to each other after being transmitted to the common terminal.
  • the implementation form of the orthogonal mode coupler OMT in this application can be a conventional orthogonal mode coupler OMT, a broadband orthogonal mode coupler OMT, or an ultra-wideband orthogonal mode coupler OMT.
  • the implementation form of the alternating-mode coupler OMT is not limited.
  • the second quadrature unit includes: a fifth port for inputting the seventh signal; a fourth port for sending the rotation unit to the The second end of the rotation unit outputs the eighth signal;
  • the first quadrature unit includes: a third port for inputting the eighth signal to the first end of the rotation unit; a second port for outputting the ninth signal, the ninth signal is determined according to the eighth signal and the first angle; the first port is used to output the tenth signal, and the ninth signal is determined according to the eighth signal and the first included angle is determined.
  • the communication device in the present application is a directional coupler
  • the first port is the main circuit end of the directional coupler in the present application
  • the second port is the directional coupler in the present application
  • the third port is the common terminal #1 of the orthogonal unit docked inside the directional coupler of the application
  • the fourth port is the common terminal #2 of the orthogonal unit docked inside the directional coupler of the application
  • the first The five port is the common terminal #3 of the directional coupler of the present application.
  • the conversion relationship between the first included angle ⁇ and the coupling amount Y of the communication device is:
  • cos ⁇ is the energy ratio of the tenth signal to the eighth signal
  • Y 1 is the coupling amount of the tenth signal to the eighth signal
  • sin ⁇ is the ninth signal to the eighth signal
  • Y 2 is the coupling amount of the ninth signal to the eighth signal.
  • the rotating unit can adjust the size of the energy ratio, that is, the size of the coupling amount by adjusting the size of the first included angle.
  • the adjustment method of the coupling amount is independent of the frequency, and the coupling amount fluctuates in the passband Smaller, with higher flatness within the passband.
  • the communication device in the present application includes a rotation angle scale that can rotate the first orthogonal unit and the second orthogonal unit, that is, the rotation angle scale corresponding to the first included angle, which is rotated to the corresponding angle in the current network.
  • the scale can be adjusted to the required coupling amount; or, the communication device in this application includes scales with different coupling amounts, and each coupling amount has a corresponding rotation angle inside the communication device, and the rotation angle is the same as the above-mentioned first clamp.
  • Angle correspondence directly adjust the communication device to the required coupling amount scale in the existing network.
  • the coupling amount adjustment method of the communication device in this application may be adjusted by the user according to actual needs, or automatically adjusted by the communication device according to a preset coupling amount, or may be preset in advance when leaving the factory.
  • the present application does not make any limitation on the specific adjustment mode of the coupling amount.
  • angles generated by rotating the first orthogonal unit and/or the second orthogonal unit can also be used for description, for example, the actual rotation of the first orthogonal unit and the second orthogonal unit respectively.
  • the first angle After the determination the above other included angles can also be uniquely determined according to the first included angle, which is not limited in the present application, and the calculation method of the other included angles is similar to the calculation method of the first included angle.
  • the first included angle ⁇ corresponding to a communication device with a coupling amount of 3dB is 45deg
  • the first included angle corresponding to a communication device with a coupling amount of 6dB ⁇ is 30deg.
  • the communication device by adjusting the size of the first included angle, the conversion between the balanced type and the unbalanced type can be realized, that is, the communication device of the balanced type and the unbalanced type can realize the material normalization.
  • the first quadrature unit includes an quadrature mode coupler OMT, and/or the second quadrature unit includes an quadrature mode coupler OMT.
  • the communication device provided by the present application compared with the conventional coupler, the communication device provided by the present application can greatly expand the working frequency range, and can realize wideband or even ultra-wideband.
  • a communication method comprising: determining an energy ratio according to a preset coupling amount, where the energy ratio includes a difference between an input signal of a first port of a first orthogonal unit and a fifth port of the second orthogonal unit The energy ratio of the output signal, or the energy ratio of the input signal of the second port of the first quadrature body and the output signal of the fifth port of the second quadrature body; the energy ratio is determined according to the energy ratio.
  • the corresponding relationship between the target coupling amount Y, the energy ratio X, and the target rotation angle ⁇ satisfies the following conditions:
  • Y 1 is the coupling amount of the input signal of the first port of the first quadrature unit to the output signal of the fifth port of the second quadrature unit, and cos ⁇ corresponds to the first quadrature unit.
  • the energy ratio X 1 , Y 2 of the input signal of the first port of the quadrature unit to the output signal of the fifth port of the second quadrature unit is the second port of the first quadrature unit.
  • the input signal accounts for the coupling amount of the output signal of the fifth port of the second quadrature unit, sin ⁇ corresponds to the input signal of the second port of the first quadrature unit and the second quadrature
  • the energy ratio X 2 of the output signal of the fifth port of the unit is the coupling amount of the input signal of the first port of the first quadrature unit to the output signal of the fifth port of the second quadrature unit.
  • a communication system comprising: the communication device in the first aspect and/or the second aspect, the communication device is used for processing a signal; and a first outdoor unit is used for receiving the The first outdoor unit is connected to the first port of the first quadrature unit of the communication device or the second outdoor unit is used for receiving the signal before processing or sending the processed signal.
  • the second outdoor unit is connected to the second port of the first orthogonal unit of the communication device; the antenna is used for receiving the signal before processing or sending the signal after processing, so The antenna is connected to the fifth port of the second orthogonal unit of the communication device.
  • a network device comprising a transceiver for receiving a signal or transmitting a signal, the transceiver comprising the communication device of the first aspect and/or the second aspect, the communication device being configured to Perform power synthesis on the signal to be sent before the signal is sent, or perform power distribution on the received signal after receiving the signal; the processor is configured to perform signal processing on the signal.
  • Figure 1 is a schematic diagram of the structure of a directional coupler.
  • FIG. 2 is a schematic diagram of an application scenario of the communication device of the present application.
  • FIG. 3 is a schematic diagram of the electrical properties of a conventional directional coupler.
  • FIG. 4 is a schematic diagram of a coupling manner of a conventional directional coupler.
  • FIG. 5 is a schematic diagram of an example of the communication device of the present application.
  • FIG. 6 is a schematic diagram of still another example of the communication device of the present application.
  • FIG. 7 is a schematic diagram of the corresponding electric field decomposition of the communication device of the present application.
  • FIG. 8 is a numerical simulation data analysis diagram of the communication device of the present application.
  • FIG. 9 is a schematic diagram of an example of the configuration of the communication device of the present application.
  • FIG. 10 is a schematic diagram of the wireless communication system of the present application.
  • FIG. 11 is a schematic diagram of a network device of the present application.
  • a directional coupler is a passive microwave device that can be used for power distribution or power combining of signals.
  • the four ports of the directional coupler include a common terminal, a main circuit terminal, a secondary circuit terminal and an isolated terminal.
  • the common end of the directional coupler 202 is connected to the antenna 201, the main end is connected to the first outdoor unit (ODU) 203, and the secondary end is connected to the second outdoor unit
  • the unit 204 is connected, and the internal isolation terminal is connected with the matched load.
  • the radio frequency signal of the first ODU 203 and the radio frequency signal of the second ODU 204 are combined by the directional coupler 202 to a common terminal for output, and then the antenna 201 converts the radio frequency signal output from the common terminal into electromagnetic waves, which are radiated into the air.
  • the electromagnetic wave is received by the antenna 201 and converted into a radio frequency signal, and the radio frequency signal is input through the common terminal of the directional coupler 202, and then branched to the main circuit terminal and the auxiliary circuit terminal, and the branched radio frequency signals are respectively output to The first ODU 203 and the second ODU 204.
  • the directional coupler can be divided into two types: balanced and unbalanced according to the energy ratio of the signal from the main circuit end and the secondary circuit end to the common end respectively.
  • the energy ratio X from the terminal to the common terminal is equal, and the energy ratio X of the signal from the main circuit terminal and the secondary circuit terminal to the common terminal in an unbalanced directional coupler is not equal.
  • the conversion relationship between the energy ratio X and the coupling amount Y (unit is dB) is as follows:
  • the energy ratio of the signal from the main terminal and the auxiliary terminal to the common terminal is equal, that is, the energy ratio of the signal from the main terminal and the auxiliary terminal to the common terminal is 1/2.
  • the energy of the corresponding signal from the secondary end to the common end is -3dB, and the energy of the corresponding signal from the main end to the common end is also -3dB.
  • the above-mentioned balanced coupler is usually used in a scenario where two ODUs work at different frequencies at the same time, also known as a "2+0" scenario, which can double the system capacity compared to using only one ODU;
  • the energy ratio of the signal from the main circuit terminal and the secondary circuit terminal to the common terminal is not equal.
  • the energy ratio of the signal from the secondary circuit terminal to the common terminal is 1/4.
  • the corresponding signal The energy from the secondary end to the common end is -6dB
  • the energy ratio of the signal from the main end to the common end is 3/4
  • the corresponding signal energy from the main end to the common end is -1.3dB.
  • the above-mentioned unbalanced couplers are usually used in a scenario where one ODU works and the other ODU is used as a backup, also known as a "1+1" hot standby (HSB) scenario. In this scenario, if the working ODU In case of failure, it can be switched to the backup ODU to ensure the normal operation of the system.
  • HSA hot standby
  • the commonly used coupling structures of directional couplers include broadside coupling structure, narrowside coupling structure and magic T structure.
  • the wide-side coupling structure and the narrow-side coupling structure mainly adjust the coupling amount by adjusting the number, size and distance of the coupling windows.
  • each coupling window will couple a part of the energy of the common end to the secondary end and the isolated end.
  • the porous coupling theory by adjusting the distance between the coupling windows, the energy of each coupling window is superimposed at the secondary end, Cancellation at the isolation end, wherein part of the energy is coupled to the output of the secondary circuit end, and part of the uncoupled energy is output from the main circuit end.
  • the coupling amount of the wide-side coupling structure and the narrow-side coupling structure coupler can be adjusted theoretically, the coupling amount of the directional coupler of the structure can be adjusted by adjusting the number, size and distance of the coupling window in practical operation. is more complex and difficult to implement.
  • the coupling amount of the coupler with the magic T structure is fixed and not adjustable, and can only achieve 3dB balanced coupling, but cannot realize unbalanced coupling.
  • the coupling amount corresponding to the broad-side coupling structure and the narrow-side coupling structure is related to the frequency, so the coupling amount will fluctuate to a certain extent in the working frequency range, which is not stable enough.
  • the operating frequency ranges of the broad-side coupling structure and the narrow-side coupling structure are also narrow.
  • an embodiment of the present application proposes a communication device, which can be used for power distribution or power combination of signals.
  • the coupling amount of the communication device can be adjusted, and the adjustment of the coupling amount does not involve the coupling window. , so it is not affected by the frequency change, the coupling quantity of the communication device is more flat in the passband, and the working frequency range of the communication device can reach wideband or even ultra-wideband.
  • the present application mainly solves the problems that the current directional coupler has a narrow bandwidth, there is a certain fluctuation in the band, and the balanced coupler and the unbalanced coupler cannot be normalized.
  • FIG. 5 shows a communication device 500 for coupling and adjustable coupling amount proposed in this application.
  • the communication device 500 mainly includes: a first orthogonal unit 510 , a rotation unit 520 and a second orthogonal unit 530 .
  • the first end 521 of the rotation unit is connected to the first quadrature unit 510, and the second end 522 of the rotation unit is connected to the second quadrature unit 530;
  • the first quadrature unit 510 is used to convert the input first signal and the second signal are processed into a third signal and a fourth signal in quadrature;
  • the second quadrature unit 530 is used for processing the third signal and the fourth signal into a fifth signal and a sixth signal in quadrature;
  • the rotation unit 520 is configured to rotate the first orthogonal unit 510 and/or the second orthogonal unit 530 around a first direction to adjust a first angle between the third signal and the fifth signal in the first plane Or the first angle between the fourth signal and the sixth signal in the first plane, the first direction
  • orthogonal unit and the rotation unit is only an example, and may also be referred to as an orthogonal structure, an orthogonal module, an orthogonal device, a rotating structure, a rotating module, a rotating device, etc., as long as the same or Similar capabilities are sufficient, and the application does not limit the specific names here.
  • the shape of the rotating unit may be a cylinder.
  • the communication device in the present application includes a rotation angle scale that can rotate the first orthogonal unit and the second orthogonal unit, that is, the rotation angle scale corresponding to the first included angle, which is rotated to the corresponding angle in the current network.
  • the scale can be adjusted to the required coupling amount; or, the communication device in this application includes scales with different coupling amounts, and each coupling amount has a corresponding rotation angle inside the communication device, and the rotation angle is the same as the above-mentioned first clamp.
  • Angle correspondence directly adjust the communication device to the required coupling amount scale in the existing network.
  • a communication device 600 for coupling and adjustable coupling amount proposed by an embodiment of the present application mainly includes: a first orthogonal unit 610 , a second orthogonal unit 620 and a rotation unit 630 .
  • the quadrature unit 610 includes a first port 611, a second port 612, a first body 613, and a third port 614
  • the second orthogonal unit 620 includes a fourth port 621, a second body 622, a fifth port 623, and the first
  • the main body 613 is connected to the first port 611 , the second port 612 and the third port 614
  • the second main body 622 is connected to the fourth port 621 , the fifth port 623 and the sixth port 624
  • the third port 614 is connected to the fourth port 621 is docked
  • the first orthogonal unit 610 and/or the second orthogonal unit 620 can rotate along the axis on which the third port 614 and the fourth port 621 are docked.
  • the communication device 600 further includes a six-port 624 .
  • the third port may correspond to the first end of the rotating unit, and the fourth port may correspond to the second end of the rotating unit.
  • the first orthogonal unit is OMT1
  • the second orthogonal unit is OMT2
  • the rotating unit is a circular waveguide
  • the first port is the main channel end of the communication device of the present application
  • the second port is the present application
  • the secondary terminal of the communication device is the common terminal #1 of the OMT1 internally connected to the communication device of the application
  • the fourth port is the public terminal #2 of the OMT internally connected to the communication device of the application
  • the fifth port is the communication terminal of the application
  • the sixth port is the isolation terminal of the communication device of the application, the isolation terminal is connected with the matching load, and the common terminal #1 and the common terminal #2 are located inside the communication device
  • the above-mentioned first quadrature unit 610 includes: a first port 611 for inputting a first signal; a second port 612 for inputting a second signal; and a first main body 613 for performing the first signal and the second signal.
  • the first processing obtains a third signal and a fourth signal respectively, and the third signal is orthogonal to the fourth signal; the third port 614 is used for outputting the third signal and the fourth signal;
  • the above-mentioned second quadrature unit 620 includes: a fourth port 621 for inputting the third signal and the fourth signal; a second main body 622 for performing second processing on the third signal to generate the first component and the fourth signal two components, and for performing third processing on the fourth signal to generate a third component and a fourth component, the first component and the second component are orthogonal, the third component and the fourth component are orthogonal, The first component has the same direction as the third component, the second component has the same direction as the fourth component; the fifth port 623 is used to output a fifth signal, the fifth signal includes the first component and the third component ;
  • the above-mentioned rotating unit 630 is used to rotate the first orthogonal unit 610 and/or the second orthogonal unit 620 around a first direction to adjust the first direction of the third signal and the fifth signal in the first plane
  • the included angle or the first included angle between the fourth signal and the sixth signal in the first plane, the first direction is the third signal and the fourth signal from the first end of the rotating unit (ie the third port 614)
  • the transmission direction of the transmission to the second end (ie, the fourth port 621) of the rotating unit, the first plane is perpendicular to the first direction.
  • the first component and the second component are components of the third signal in the first plane, the first component is the projection of the third signal on the first included angle direction, and the second component is the first component
  • the projection of the three signals in the direction of the second included angle, the second included angle is complementary to the first included angle;
  • the third component and the fourth component are the components of the fourth signal in the first plane, the first included angle
  • the three components are the projection of the fourth signal in the first included angle direction, and the fourth component is the projection of the fourth signal in the second included angle direction.
  • the communication apparatus 600 further includes a six port 624, and the sixth port 624 is used for outputting a sixth signal, and the sixth signal includes the second component and the fourth component.
  • the planes on which the orthogonal signals after the first processing, the second processing, and the third processing are located are perpendicular to the signal transmission direction (ie, the first direction) between the two orthogonal units, and the initial state below, the first included angle is 0deg, and the direction of the quadrature signal after the first processing by the first quadrature unit and the second or third processing by the second quadrature unit at this time are the same.
  • the above-mentioned second quadrature unit 620 includes: a fifth port 623 for inputting a seventh signal; a second main body 622 for performing fourth processing on the seventh signal to obtain an eighth signal, and the eighth signal after the fourth processing
  • the signal is perpendicular to the first direction, and the first direction is the propagation direction of the seventh signal from the fourth port to the third port; the fourth port 621 is used to output the eighth signal after the fourth processing;
  • the above-mentioned first quadrature unit 610 includes: a third port 614 for inputting the eighth signal after the fourth processing; a first main body 613 for performing the fifth processing on the eighth signal to obtain the ninth signal and the tenth signal, the ninth signal is orthogonal to the tenth signal; the second port 612 is used for outputting the ninth signal; the first port is used for outputting the tenth signal;
  • the above-mentioned rotating unit 630 is used to rotate the first orthogonal unit 610 and/or the second orthogonal unit 620 around a first direction, so as to adjust the first direction of the ninth signal and the eighth signal in the first plane
  • the included angle, the first direction is the eighth transmission direction from the second end (ie the fourth port 621 ) of the rotating unit to the first end (ie the third port 614 ) of the rotating unit, the first plane perpendicular to the first direction.
  • the ninth signal and the tenth signal are components of the eighth signal in the first plane, the ninth signal is the projection of the eighth signal in the first included angle direction, and the tenth signal is the first The projection of the eight signals in the direction of the second included angle, the second included angle is complementary to the first included angle.
  • the first signal and the second signal may be radio frequency signals input from the first ODU and the second ODU, respectively, and the fourth signal may be a radio frequency input by converting electromagnetic waves from an antenna connected to the fifth port. Signal.
  • the sixth port is connected to a matching load for processing the sixth signal, so that no signal is output from the sixth port.
  • first coupling body and the first port, the second port, and the third port may adopt other connection methods, for example, the first port and the second port may be installed on other surfaces of the first coupling body.
  • the second coupling body and the fourth port, the fifth port, and the sixth port can also be connected in other ways.
  • the fifth port and the sixth port can be installed on other surfaces of the second coupling body.
  • Different ports in this application The adjustment principle of the coupling amount corresponding to the installation method is similar, which is not limited in this application.
  • the naming of the components in the communication device in this application are only used as examples.
  • the first body can also be called the first coupling body, the first orthogonal mode coupling body, the first orthogonal mode coupling core, etc., as long as the same or similar functions can be achieved, this The application is not limited here.
  • the planes where the quadrature signals after the fourth and fifth processing above are located are perpendicular to the signal transmission direction (ie, the first direction) between the two quadrature units.
  • the first clamp The angle is 0deg.
  • the direction of the quadrature signal after the fourth processing by the second quadrature unit and the fifth processing by the first quadrature unit is the same.
  • the first orthogonal unit is an orthogonal mode coupler (orth-mode transducer, OMT), and/or the second orthogonal unit is an orthogonal mode coupler OMT, and the orthogonal mode
  • the function of the coupler OMT is to separate a signal into two orthogonally polarized signals or to combine two orthogonally polarized signals into one signal, and the orthogonal signals at the two branch ports of the orthogonal mode coupler are isolated from each other. , after being transmitted to the common terminal, they are still orthogonal to each other and do not affect each other.
  • the implementation form of the orthogonal mode coupler OMT in this application can be a conventional OMT, a wideband OMT, or an ultra-wideband OMT. In this application, the orthogonal mode coupler OMT The implementation form of the OMT is not limited in any way.
  • the orthogonal mode coupler OMT may include narrowband OMT, wideband OMT and ultra-wideband OMT according to the operating frequency range.
  • the relative bandwidth of narrowband OMT is usually less than 10%
  • the relative bandwidth of wideband OMT is usually greater than 20%
  • the relative bandwidth of ultra-wideband OMT is usually greater than 35%, which is the ratio of signal bandwidth to center frequency.
  • the communication device in the present application realizes the adjustment of different coupling amounts by internally docking two orthogonal units and adjusting the relative angle between the two orthogonal units, that is, the first angle.
  • the adjustment method of the coupling amount of the communication device of the present application in the scenario of power combination will be introduced in detail, that is, the contents of the above-mentioned first processing, second processing and third processing will be further introduced.
  • FIG. 7 shows a possible coupling amount adjustment method of the communication device in the present application.
  • the signal input from the first port into the first coupling body is the first signal
  • the signal from the second port is assumed to be the first signal.
  • the signal input by the port into the first coupling body is the second signal.
  • the third port outputs the first signal after the first processing, that is, the signal A (that is, the third signal), and the output
  • the second signal after the first processing, that is, the signal B (that is, the fourth signal) are input to the second main body through the fourth port, and the second processing is performed on the signal A to obtain the first component Asin ⁇ and the second component Acos ⁇ , and perform third processing on the signal B to obtain the third component Bcos ⁇ and the fourth component Bsin ⁇ .
  • the angle between the electric field directions between the first port and the fifth port in FIG. 7 can be controlled, that is, the first angle ⁇ .
  • the electric field directions of the port and the sixth port are decomposed, the signal parallel to the electric field of the fifth port enters the fifth port, and the signal entering the fifth port is Acos ⁇ ; the signal parallel to the electric field of the sixth port enters the isolation end and enters the The signal at the sixth port is Asin ⁇ .
  • the signal B input from the fourth port is decomposed according to the electric field directions of the fifth port and the sixth port.
  • the signal parallel to the electric field of the fifth port enters the fifth port, and the signal entering the fifth port is Bsin ⁇ ; parallel The signal of the electric field at the sixth port enters the sixth port, and the signal entering the sixth port is Bcos ⁇ .
  • the signals entering the common port #3 port from the main circuit end and the secondary circuit end are Acos ⁇ and Bsin ⁇
  • the signals entering the isolation end are Asin ⁇ and Bcos ⁇ .
  • the ratio of the final output signal from the channel end and the secondary channel end to the common terminal #3 is only related to the first angle ⁇ , and has nothing to do with the frequency, that is, the coupling amount of the signal from the main channel end and the secondary channel end to the common terminal #3 is only related to the frequency.
  • the first included angle ⁇ is related, independent of frequency. That is to say, it is only necessary to adjust the size of the first included angle ⁇ to adjust the coupling amount of the signal from the main circuit end and the secondary circuit end to the common terminal #3 respectively.
  • the size of the first included angle ⁇ can be adjusted by rotating the unit, so as to adjust the size of the energy ratio, that is, the size of the coupling amount.
  • the corresponding relationship between the included angle ⁇ , the energy ratio, and the coupling amount is as follows:
  • the communication device of the present application can realize the conversion between the balanced type and the unbalanced type by adjusting the size of the included angle ⁇ , that is, the communication device of the balanced type and the unbalanced type can realize the normalization.
  • the adjustment method of the coupling amount of the communication device of the present application in the scenario of power distribution is similar to the adjustment method of the coupling amount of the communication device of the present application in the scenario of power combination, and the above description can be referred to, that is, the content of the fourth processing and the fifth processing can be Please refer to the content description of the first processing, the second processing and the third processing above, which will not be repeated here.
  • the third signal, the fourth signal, the fifth signal, the sixth signal, the eighth signal, the ninth signal, and the tenth signal are all located on a first plane, and the first plane is perpendicular to the first direction
  • the plane, the first direction is the direction in which the signal is transmitted between the first orthogonal unit and the second orthogonal unit, that is, the direction in which the signal is transmitted in the rotating unit.
  • the above-mentioned first orthogonal unit and second orthogonal unit are OMTs.
  • the influence of the docking angle between the auxiliary terminal, the isolation terminal and the common terminal #3 and other devices for example, if the rotation angle is adjusted from ⁇ 1 to ⁇ 2 , considering the docking misalignment between the common terminal #3 and the antenna terminal, the maximum transmission rate can be guaranteed.
  • the energy ratio is cos(( ⁇ 2 - ⁇ 1 )/2), and the adjustment range of the rotation angle can be determined according to the specific acceptable energy attenuation in the current network.
  • the actual modeling and simulation calculation results are shown in Figure 8, where the abscissa represents the operating frequency of the communication device, and the ordinate represents the coupling amount of the communication device.
  • the coupling amount proposed in this application can be In the working frequency range of the tuned communication device, the value of the coupling amount corresponding to each first included angle is relatively stable, the fluctuation of the coupling amount is small, and the coupling amount of the communication device has a high flatness in the passband.
  • the structure of the communication device 900 in this application is shown in FIG. 9 , the electrical performance part of the coupler is composed of two OMTs, the OMT1 adopts the front and rear outlets, and the front outlet is the main circuit end of the coupler , the rear outlet is the secondary end of the coupler, which is connected to the ODU.
  • the two shunt ends of OMT2 are the right outlet and the front outlet.
  • the right outlet is the common end of the coupler, which is separated and connected to the antenna through the flexible waveguide.
  • the front outlet is the isolation end, which is connected to the matching load.
  • the OMT2 can rotate at a certain angle.
  • the angle between the short side of common terminal #3 (that is, the side parallel to the electric field) and the short side of the main circuit end can be adjusted to 45deg. It is a balanced coupling device; in the same way, by rotating OMT2 to the short side of the common terminal #3, the angle between the short side of the main circuit end and the short side of the main circuit end is 30deg. At this time, the main circuit end has -1.3dB energy to the common port, and the secondary circuit end has - 6dB energy to the common port, it is an unbalanced coupling device.
  • the rotation of the OMT1 and/or OMT2 can be controlled by setting a rotary joint on the circular waveguide where the common terminal #1 and the common terminal #2 are butted, or a clip can be set on the communication device of the present application
  • the angular rotation controller is used to control the rotation of OMT1 and/or OMT2, and the above-mentioned rotation angle can be continuously adjusted or node-type adjusted.
  • the present application controls the relative rotation angle between OMT1 and OMT2 (that is, the first
  • the specific implementation manner of the included angle) is not limited, as long as the solution that can adjust the relative rotation angle between the OMT1 and the OMT2 is within the protection scope of the present application.
  • the communication device in this application can also be fixed by OMT2, OMT1 can be rotated by a certain angle, or both OMT1 and OMT2 can be rotated, as long as the relative angle between OMT1 and OMT2 can be adjusted. This is not limited.
  • the common end of the OMT2 and the antenna may also adopt other installation and docking methods, such as integrated installation, etc., which is not limited in this application.
  • OMT1 and OMT2 can also use other outlet forms, that is, the main circuit end and the auxiliary circuit end can also be installed on other surfaces of the OMT1 core, and the coupling end and the third common terminal can also be installed on the OMT2 core.
  • this application does not make any limitation here.
  • This application designs a communication device with an adjustable coupling amount.
  • the coupling amount is only related to the relative angle (ie, the first angle) between the first orthogonal unit and the second orthogonal unit, and has nothing to do with the frequency, which can solve the problem of conventional Coupler problems are as follows:
  • the coupling amount of conventional windowed couplers is related to frequency, and there is a certain fluctuation with frequency in the passband.
  • the coupling amount of the communication device in this application has nothing to do with frequency, High flatness within the passband.
  • the bandwidth of the communication device proposed in the present application depends on the bandwidth of the OMT, because the OMT can realize wideband or even ultra-wideband. If the first orthogonal unit and the second orthogonal unit are OMTs, compared with the conventional coupler, the The communication device can greatly expand the operating frequency range of the directional coupler.
  • the conventional window coupler needs to change the coupling amount, the corresponding coupling structure needs to be adjusted, such as the number, size, distance, etc. of the window opening. It is difficult to realize the normalization of directional couplers with different coupling amounts; the magic T cannot change the coupling amount ;
  • the coupling amount of the communication device in this application is only related to the first included angle, and the required coupling amount can be achieved by rotating to a specific included angle.
  • the adjustment method is simple and easy to implement, and couplers with different coupling amounts can be unified into one device.
  • the communication device in this application further includes a rotation angle scale of the first orthogonal unit and the second orthogonal unit that can be rotated, and different angle scales correspond to different coupling amounts, or, the communication in this application
  • the device also includes scales for different coupling amounts. As an example and not a limitation, it is a 6dB coupler when it is turned to a 30deg position, and a 3dB coupler when it is turned to a 45deg position.
  • the communication device may also include scales corresponding to other coupling amounts or other angles. Rotate to the corresponding coupling amount scale or the corresponding included angle scale in the current network to adjust to the required coupling amount.
  • the coupling amount adjustment method of the communication device in this application may be adjusted by the user according to actual needs, or may be adjusted automatically by the communication device, or may be preset in advance when leaving the factory, etc.
  • the specific adjustment mode of the coupling amount is not limited in any way.
  • a possible adjustment method is as follows: first, the communication device determines an energy ratio according to a preset coupling amount, and the energy ratio includes the first quadrature The energy ratio of the input signal of the first port of the unit to the output signal of the fifth port of the second quadrature unit, or the input signal of the second port of the first quadrature body and the fifth port of the second quadrature body The energy ratio of the output signal of the port; then, the communication device determines, according to the energy ratio, a first included angle at which the first orthogonal unit and/or the second orthogonal unit rotates around a first direction, where the first direction is the signal the direction of transmission between the first orthogonal unit and the second orthogonal unit; finally, the communication device rotates the first orthogonal unit and/or the second orthogonal unit around the first direction, so that the first orthogonal unit The relative rotation angle between the unit and the second orthogonal unit is the first included angle, and
  • the above-mentioned corresponding relationship between the preset coupling amount Y, the energy ratio X, and the first included angle ⁇ satisfies the following conditions:
  • Y 1 is the coupling amount of the input signal of the first port of the first quadrature unit to the output signal of the fifth port of the second quadrature unit, and cos ⁇ corresponds to the first quadrature unit of the first quadrature unit.
  • the energy ratios X 1 and Y 2 of the input signal of one port and the output signal of the fifth port of the second quadrature unit are the ratio of the input signal of the second port of the first quadrature unit to the second quadrature unit.
  • the coupling amount of the output signal of the fifth port, sin ⁇ corresponds to the energy ratio X 2 of the input signal of the second port of the first quadrature unit and the output signal of the fifth port of the second quadrature unit.
  • the coupling amount of the communication device in the embodiment of the present application can be adjusted correspondingly in the existing network according to the specific situation.
  • the above embodiment is only an example of the power combination scenario of the communication device in the present application, and should not limit the communication device in the present application.
  • the application scenario of the communication device in the present application is not limited. Limited to this, it is also applicable to the scenario of power allocation.
  • the working method of the communication device is similar to that of power combination, which will not be repeated here.
  • first angle can be described in various ways, for example, the relative rotation angle between the first orthogonal unit and the second orthogonal unit, the relative angle between the two orthogonal units, the common end The angle between the short side of #3 and the short side of the main circuit end, the angle between the electric field direction of the common terminal #3 entering the second orthogonal unit and the electric field direction of the main circuit end entering the first orthogonal unit, the angle between the third signal and the fifth The first included angle of the signal in the first plane, the first included angle of the fourth signal and the sixth signal in the first plane, and the signal transmitted from the first port to the third port in the third The included angle between the electric field direction of the port and the electric field direction of the signal transmitted from the fifth port to the fourth port at the fourth port, and the first included angle between the eighth signal and the ninth signal in the first plane Etc., it should be understood in terms of the specific meaning of the description, and the above descriptions all correspond to the same included angle, that is, the first included angle.
  • the short side of the port in the communication device of the present application refers to the side parallel to the electric field.
  • the relative rotation angle between the first orthogonal unit and the second orthogonal unit is used as an example for illustration, and it is also possible to use other methods by rotating the first orthogonal unit and/or the second orthogonal unit.
  • the resulting included angle is described, for example, calculated by the actual rotation angle of the first orthogonal unit and the second orthogonal unit, or by the direction of the electric field at the isolated end entering the second orthogonal unit and the direction of the electric field at the secondary end entering the second orthogonal unit.
  • the included angle of the electric field direction of an orthogonal unit is calculated, which is not limited in this application, and the calculation methods of other included angles are similar to the above-mentioned embodiments, and are not repeated here.
  • FIG. 10 shows a structural diagram of a wireless communication system 1000 of the present application.
  • the communication system includes an antenna 1001 , a communication device 1002 in the present application, and an outdoor unit 1003 and an outdoor unit 1004 .
  • the antenna receives the electromagnetic wave, converts the electromagnetic wave into a radio frequency signal and inputs it to the communication device, and the communication device performs power distribution processing on the radio frequency signal, and sends the radio frequency signal to the outdoor unit 1003 and the outdoor unit 1004 after processing in a certain proportion.
  • the radio frequency signal transmitted from the two outdoor units is input into the communication device, the radio frequency signal is subjected to power synthesis processing by the communication device, and the processed radio frequency signal is coupled in a certain proportion and sent to the antenna, and the antenna will It is converted into electromagnetic waves and radiated into the air.
  • FIG. 10 shows a simplified schematic structural diagram of a network device 1000 .
  • the network device takes a base station as an example.
  • the base station includes a processor 1010 and a transceiver 1020 .
  • the processor part is mainly used for baseband processing, controlling the base station and so on.
  • the transceiver 1020 may generally be referred to as a transceiver unit, a transceiver, a transceiver circuit, or the like.
  • the processor 1010 is usually the control center of the base station, and can usually be referred to as a processing unit; the transceiver 1020 is mainly used for transmitting and receiving radio frequency signals and converting radio frequency signals to baseband signals.
  • the processor 1110 may include one or more boards 1111 , and each board 1111 may include one or more processors 1113 and one or more memories 1112 .
  • the processor 1113 is used to read and execute the programs in the memory to realize the baseband processing function and control the base station. If there are multiple boards, each board can be interconnected to enhance the processing capability.
  • one or more processors may be shared by multiple boards, or one or more memories may be shared by multiple boards, or one or more processors may be shared by multiple boards at the same time. device.
  • the transceiver 1120 includes an antenna 1121 and a radio frequency circuit 1122, wherein the radio frequency circuit 1122 is mainly used for radio frequency processing.
  • a device for implementing a receiving function in the transceiver 1120 may be regarded as a receiving unit, and a device for implementing a transmitting function may be regarded as a transmitting unit, that is, the transceiver includes a receiving unit and a transmitting unit.
  • the receiving unit may also be referred to as a receiver, a receiver, or a receiving circuit, and the like, and the transmitting unit may be referred to as a transmitter, a transmitter, or a transmitting circuit, and the like.
  • the transceiver 1120 may include one or more communication devices in the present application.
  • the disclosed systems and apparatuses may be implemented in other manners.
  • the apparatus embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented.
  • the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and components shown as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.

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Abstract

La présente demande concerne un appareil de communication et un procédé de communication, qui sont appliqués à un système de transmission par micro-ondes. L'appareil de communication comprend une première unité orthogonale, une seconde unité orthogonale et une unité de rotation, une première extrémité de l'unité de rotation étant connectée à la première unité orthogonale ; une seconde extrémité de l'unité de rotation étant connectée à la seconde unité orthogonale ; l'unité de rotation étant utilisée pour faire tourner la première unité orthogonale et/ou la seconde unité orthogonale dans une première direction ; et la première direction étant une direction d'émission de signaux entre la première extrémité et la seconde extrémité de l'unité de rotation. Un degré de couplage de l'appareil de communication peut être ajusté au moyen de l'unité de rotation commandant l'angle inclus de rotation relative entre la première unité orthogonale et la seconde unité orthogonale, le moyen d'ajustement est simple et facile à actionner, des matériaux de spécifications de type équilibré et des spécifications de type déséquilibré dans l'appareil de communication sont normalisés, et le degré de couplage de l'appareil de communication est indépendant de la fréquence, de telle sorte que la planéité du degré de couplage de l'appareil de communication dans un canal est considérablement améliorée.
PCT/CN2021/074498 2021-01-29 2021-01-29 Appareil de communication et procédé de communication WO2022160290A1 (fr)

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EP21921892.2A EP4258557A4 (fr) 2021-01-29 2021-01-29 Appareil de communication et procédé de communication
PCT/CN2021/074498 WO2022160290A1 (fr) 2021-01-29 2021-01-29 Appareil de communication et procédé de communication

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WO2016171907A1 (fr) * 2015-04-24 2016-10-27 At&T Intellectual Property I, Lp Dispositif de couplage directionnel et procédés destinés à être utilisés avec ce dernier
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