Antenna device, electronic equipment and radio frequency communication method

Abstract

The invention discloses an antenna device, electronic equipment and a radio frequency communication method. The antenna device provided by the invention comprises a radio frequency module, a coupling module, an antenna module and an impedance adjustment module, the radio frequency module is connected with an input port of the coupling module, a first output port of the coupling module is connected with the antenna module, and a second output port of the coupling module is connected with the impedance adjusting module; the coupling module has a first state and a second state, and the amplitude difference between the first reflection signal and the second reflection signal in the second state is smaller than the amplitude difference between the first reflection signal and the second reflection signal in the first state; the first reflection signal is obtained based on a transmission signal output by the radio frequency module to the antenna module; the second reflection signal is obtained based on a transmission signal output by the radio frequency module to the impedance adjustment module.

Description

Technical Field

[0001] This application belongs to the field of electronic technology, and particularly relates to an antenna device, an electronic device, and a radio frequency communication method. Background Art

[0002] With the rapid development of mobile communication, in order to support a better user experience, the radio frequency conduction power has been increasing and is approaching the upper limit of the reliability of radio frequency devices. To truly achieve an extreme user experience and make the transmitted signal at the radio frequency end fully act on the antenna without voltage and current reflection, it is necessary to satisfy the impedance matching between the radio frequency end (source impedance) and the antenna end (load impedance). However, usually, in the scenario where users use resistive devices, since the human hand and head are media with relatively strong absorption, when the user approaches the mobile phone, the impedance of the antenna located at the mobile phone frame changes drastically, resulting in a radio frequency antenna mismatch phenomenon.

[0003] Currently, related technologies (such as patent document CN117559132A) generally use a two-path reflected wave phase cancellation scheme of two antennas to reduce the degree of radio frequency antenna mismatch. However, there is a problem that the effect of reducing the degree of radio frequency antenna mismatch in the two-path reflected wave phase cancellation scheme in related technologies is insufficient. For example, since this method cannot control the amplitude sizes of the two-path reflected waves corresponding to the two antennas and cannot ensure the cancellation degree of the two-path reflected waves, it can only reduce the degree of radio frequency antenna mismatch to a certain extent. Summary of the Invention

[0004] This application provides an antenna device, an electronic device, and a radio frequency communication method, which at least solve the problem that the effect of reducing the degree of radio frequency antenna mismatch in the reflected wave phase cancellation scheme in related technologies is insufficient.

[0005] In a first aspect, this application provides an antenna device, including: A radio frequency module, a coupling module, an antenna module, and an impedance adjustment module; the coupling module has an input port, a first output port, and a second output port; the radio frequency module is connected to the input port of the coupling module, the first output port of the coupling module is connected to the antenna module, and the second output port of the coupling module is connected to the impedance adjustment module; Wherein, the coupling module has a first state and a second state, and the amplitude difference between the first reflected signal and the second reflected signal in the second state is less than the amplitude difference between the first reflected signal and the second reflected signal in the first state; the first reflected signal is obtained based on the transmission signal output from the radio frequency module to the antenna module; the second reflected signal is obtained based on the transmission signal output from the radio frequency module to the impedance adjustment module.

[0006] In a second aspect, this application provides an electronic device, including the antenna device provided in the first aspect.

[0007] In a third aspect, the present application provides a radio frequency communication method, which is applied to the antenna device provided in the first aspect. The method includes: When the impedance of the antenna module is the first impedance, the switching unit in the impedance adjustment module is conducted with the second matching unit; By adjusting the power distribution ratio of the coupling module, the amplitude difference between the first reflected signal and the second reflected signal is reduced; Wherein, the first impedance does not match the impedance of the radio frequency module.

[0008] In an embodiment of the present application, the antenna device includes a radio frequency module, a coupling module, an antenna module, and an impedance adjustment module; the coupling module has an input port, a first output port, and a second output port; the radio frequency module is connected to the input port of the coupling module, the first output port of the coupling module is connected to the antenna module, and the second output port of the coupling module is connected to the impedance adjustment module; wherein, the coupling module has a first state and a second state, and the amplitude difference between the first reflected signal and the second reflected signal in the second state is less than the amplitude difference between the first reflected signal and the second reflected signal in the first state; the first reflected signal is obtained based on the transmission signal output by the radio frequency module to the antenna module; the second reflected signal is obtained based on the transmission signal output by the radio frequency module to the impedance adjustment module. In this way, in the process of coupling the two reflected signals of the antenna module and the impedance adjustment module by using the coupling module, the amplitude difference between the two reflected signals is adjusted by using different working states of the coupling module. Compared with the first state of the coupling module, the coupling module reduces the amplitude difference between the two reflected signals in the second state, so that the impedance mismatch phenomenon between the radio frequency end and the antenna end can be minimized. Description of the Drawings

[0009] The above and / or additional aspects and advantages of the present application will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, where: Figure 1 A schematic diagram of a radio frequency antenna structure provided by the prior art; Figure 2 A schematic diagram of an antenna device provided by an embodiment of the present application; Figure 3 A schematic diagram of another antenna device provided by an embodiment of the present application; Figure 4 A schematic diagram of a reflected signal passing through a coupling module provided by an embodiment of the present application; Figure 5 A schematic diagram of another reflected signal passing through a coupling module provided by an embodiment of the present application; Figure 6 A schematic flowchart of a radio frequency communication method provided by an embodiment of the present application; Figure 7 It is a schematic flowchart of another radio frequency communication method provided by an embodiment of the present application; Figure 8 It is a schematic diagram of an electronic device provided by an embodiment of the present application.

[0010] Description of the reference numerals in the drawings: 10 - Antenna device; 100 - Radio frequency module; 200 - Coupling module; 210 - First coupler; 220 - First phase shifter; 230 - Second phase shifter; 240 - Second coupler; 300 - Antenna module; 400 - Impedance adjustment module; 410 - Switching unit; 420 - First matching unit; 430 - Second matching unit; 700 - Electronic device; A - Input port of the coupling module, B - First output port of the coupling module; C - Second output port; D - Isolation port of the coupling module; P1 - Input port of the first coupler; P2’ - Through port of the first coupler; P3’ - Coupling port of the first coupler; P4 - Isolation port of the first coupler; P1’ - Input port of the second coupler; P2 - Through port of the second coupler; P3 - Coupling port of the second coupler; P4’ - Isolation port of the second coupler; Com - Fixed end of the switching unit; RF_1 - First moving end of the switching unit; RF_2 - Second moving end of the switching unit; ANT0 - First antenna; ANT1 - Second antenna; R1 - Load element; NET1 - First matching network; R2 - First load unit; NET2 - Second matching network; R3 - Second load unit; Control signal - Control signal of the switching unit; DAC1 - Control signal of the first phase shifter; DAC2 - Control signal of the second phase shifter; V ANT0 - First reflected signal; V match - Second reflected signal. Detailed implementation manners

[0011] Hereinafter, embodiments of the present application will be described in detail. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present application and should not be construed as a limitation to the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts fall within the scope of protection of the present application.

[0012] The terms "first", "second" in the description and claims of this application may explicitly or implicitly include one or more of such features. In the description of this application, unless otherwise specified, the meaning of "a plurality" is two or more. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / ", generally represents an "or" relationship between the associated objects before and after.

[0013] In the description of this application, it should be understood that the orientation or positional relationship indicated by terms such as "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to this application.

[0014] In the description of this application, it should be noted that unless otherwise clearly specified and limited, the terms "connected", "connected to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0015] With the rapid development of mobile communication, in order to support a better user experience, the radio frequency conduction power is getting higher and higher, and it has approached the upper limit of the reliability of radio frequency devices. To truly achieve an ultimate user experience, simply improving radio frequency conduction is not enough. The radio frequency antenna also needs to play a role because the power radiated from the mobile phone end, TRP (Total Radiated Power), = radio frequency conduction + antenna efficiency. And from the knowledge of transmission lines, to make the radio frequency conduction power fully act on the antenna without voltage and current reflection, it is necessary to satisfy the conjugate of the radio frequency impedance (source impedance) and the antenna impedance (load impedance), that is, conjugate matching. However, usually, in the current design, only conjugate matching between the radio frequency impedance and the antenna impedance can be achieved in the free space scenario (the free space scenario means the mobile phone is placed in an open space without any medium interfering with the antenna performance), and special scenarios such as the human hand scenario (the human hand scenario means a human's hands touch the mobile phone) and the head-hand scenario (the head-hand scenario means a human's head touches the mobile phone) cannot be taken into account.

[0016] In the human hand scenario and the head - hand scenario, since the human hand and head are media with relatively strong absorption, when approaching the mobile phone, the antenna impedance at the mobile phone frame will change violently, thus deviating from the original impedance region. Even in the free - space scenario, although the radio - frequency impedance and the antenna impedance are conjugate - matched, in the human hand scenario and the head - hand scenario, due to the change in the antenna impedance, a mismatch phenomenon will occur. Mismatch means that the radio - frequency impedance and the antenna impedance are not conjugate - matched, voltage and current are reflected, and the radio - frequency power cannot be fully transmitted to the antenna.

[0017] The existing - technology patent solutions use the phase - cancellation scheme between the two reflected waves corresponding to two antennas, which can only reduce the degree of radio - frequency antenna mismatch and cannot completely achieve no reflection, so the radio - frequency power cannot fully enter the antenna. For example, this method cannot control the amplitude of the two reflected waves corresponding to the two antennas, cannot ensure the degree of cancellation of the two reflected waves, and can only reduce the degree of radio - frequency antenna mismatch to a certain extent. In addition, this method requires more than two antennas to solve the mismatch. Only when both antennas are mismatched can the reflected waves be cancelled. When only the impedance of one antenna changes, resulting in mismatch, the reflection - wave cancellation effect is almost zero. Moreover, in this method, the transmission signal is output from a radio - frequency module, and after passing through the coupler, it passes through two antennas simultaneously to transmit the same signal. Therefore, during the signal - transmission process, one antenna is very likely to interfere with the other antenna, affecting data transmission and user experience.

[0018] For example, the core logic of the existing technology (such as CN117559132A) for dealing with radio - frequency antenna mismatch is as Figure 1 shown. The 90° directional coupler has an input port, a through port, a coupled port, and an isolation port. The radio - frequency module inputs the transmission signal to the input port of the 90° directional coupler. After passing through the 90° directional coupler, the through port is connected to the first antenna ANT0, the coupled port is connected to the second antenna ANT1, and the isolation port is connected to the load device to the ground. Assume that due to the change in the external environment, the impedance of the first antenna ANT0 / second antenna ANT1 changes, resulting in standing waves. Denote the voltage wave reflected from the first antenna ANT0, and the voltage wave reflected from ANT1. and have a natural 90° phase difference due to the action of the 90° directional coupler. The reflected voltage wave reverses through the 90° directional coupler, and the voltage wave arriving at the input port, the reflected voltage wave reverses through the 90° directional coupler, and the voltage wave arriving at the input port. Therefore, the final reflected signal arriving at the input port.

[0019] Among them, since and part of the voltages cancel each other out, thereby weakening the reflected wave reaching the input port, and thus reducing the mismatch degree of the RF antenna. However, since this method cannot control and in magnitude, it is impossible to ensure , so the mismatch degree of the RF antenna can only be reduced to a certain extent. And this method requires more than two antennas to solve the mismatch. Only when both antennas are mismatched can the reflected waves be canceled. When only the impedance of one antenna changes, resulting in mismatch, there is almost no reflected wave cancellation effect. Therefore, the application scenario of this technology is relatively narrow.

[0020] Based on this, in the embodiments of the present application, according to the change of the antenna load impedance, the coupling coefficient of the coupling module is dynamically adjusted, and then the power distribution ratio of the two output ports of the coupling module is changed, and the amplitude of the reflected signals at the two output ports of the coupling module is changed. Before and after the power distribution ratio is adjusted, the amplitude difference between the reflected signals at the two output ports of the coupling module is reduced. Ideally, the amplitude difference between the reflected signals at the two output ports of the coupling module can be approximated to 0, so that the RF impedance and the antenna impedance are conjugate matched in real time, achieving no mismatch and no reflection. And, compared with the related technology, there is no need for at least two antennas to implement the reflected wave cancellation scheme. When the impedance of any one antenna changes, resulting in RF antenna mismatch, the reflected wave generated in the impedance adjustment module can also be used for cancellation, expanding the application scope of the technology.

[0021] Next, the antenna device, electronic device, and RF communication method provided by the embodiments of the present application will be described in detail with reference to the accompanying drawings.

[0022] Figure 2 It is a schematic diagram of an antenna device provided by an embodiment of the present application.

[0023] As Figure 2 shown, an embodiment of the present application provides an antenna device 10, which may include: a radio frequency module 100, a coupling module 200, an antenna module 300, and an impedance adjustment module 400; the coupling module 200 has an input port A, a first output port B, and a second output port C; the radio frequency module 100 is connected to the input port A of the coupling module, the first output port B of the coupling module is connected to the antenna module 300, and the second output port C of the coupling module is connected to the impedance adjustment module 400; Among them, the coupling module 200 has a first state and a second state. In the second state, the amplitude difference between the first reflected signal and the second reflected signal is smaller than that in the first state. The first reflected signal is obtained based on the transmission signal output by the radio frequency module 100 to the antenna module 300. The second reflected signal is obtained based on the transmission signal output by the radio frequency module 100 to the impedance adjustment module 400.

[0024] Among them, the coupling module 200 further has an isolation port D, and the isolation port D of the coupling module 200 is grounded through a load element R1.

[0025] In the embodiment of the present application, since the first reflected signal is obtained based on the transmission signal output by the radio frequency module 100 to the antenna module 300, the amplitude of the first reflected signal is associated with the output power of the first output port B of the coupling module 200. Since the second reflected signal is obtained based on the transmission signal output by the radio frequency module 100 to the impedance adjustment module 400, the amplitude of the second reflected signal is associated with the output power of the second output port C of the coupling module 200.

[0026] In the embodiment of the present application, the power distribution ratio of the coupling module 200 is the ratio of the output power of the first output port B of the coupling module 200 to the output power of the second output port C of the coupling module 200. By adjusting the power distribution ratio of the coupling module 200, the output power of the first output port B of the coupling module 200 and the output power of the second output port C of the coupling module 200 can be adjusted, and further the amplitude of the first reflected signal and the amplitude of the second reflected signal can be changed, so that the amplitude difference between the first reflected signal and the second reflected signal becomes smaller.

[0027] In the embodiment of the present application, compared with before adjusting the power distribution ratio of the coupling module 200, after adjusting the power distribution ratio of the coupling module 200, the amplitude difference between the first reflected signal and the second reflected signal can be reduced, so that the impedance mismatch phenomenon between the radio frequency end and the antenna end can be minimized.

[0028] The antenna device provided by the embodiment of the present application includes a radio frequency module, a coupling module, an antenna module, and an impedance adjustment module; the coupling module has an input port, a first output port, and a second output port; the radio frequency module is connected to the input port of the coupling module, the first output port of the coupling module is connected to the antenna module, and the second output port of the coupling module is connected to the impedance adjustment module; wherein, the coupling module has a first state and a second state, and the amplitude difference between the first reflection signal and the second reflection signal in the second state is less than the amplitude difference between the first reflection signal and the second reflection signal in the first state; the first reflection signal is obtained based on the transmission signal output by the radio frequency module to the antenna module; the second reflection signal is obtained based on the transmission signal output by the radio frequency module to the impedance adjustment module. In this way, in the process of coupling the two-way reflection signals of the antenna module and the impedance adjustment module by using the coupling module, the amplitude difference between the two-way reflection signals is adjusted by using different working states of the coupling module. Compared with the first state of the coupling module, the coupling module reduces the amplitude difference between the two-way reflection signals in the second state, so as to be able to minimize the impedance mismatch phenomenon between the radio frequency end and the antenna end.

[0029] In a specific embodiment, the power distribution ratio of the coupling module 200 can be adjusted. The first state is the state of the coupling module 200 before the power distribution ratio is adjusted, and the second state is the state of the coupling module 200 after the power distribution ratio is adjusted; wherein, the power distribution ratio is the ratio of the output power of the first output port B of the coupling module 200 to the output power of the second output port C of the coupling module 200; wherein, in the second state, the power distribution ratio of the coupling module 200 can be accurately adjusted in this embodiment so that the amplitude difference between the first reflection signal and the second reflection signal is 0. For example, in an ideal situation, by adjusting the power distribution ratio of the coupling module 200 to a target value, the amplitudes of the first reflection signal and the second reflection signal are made the same, so that the amplitude difference between the first reflection signal and the second reflection signal is 0. The radio frequency impedance and the antenna impedance are conjugate matched in real time. In this way, in an ideal situation, there can be no mismatch and no reflection, and the impedance mismatch phenomenon between the radio frequency end and the antenna end can be minimized.

[0030] In order to realize the adjustable power distribution ratio of the coupling module 200, the embodiment of the present application can use a phase shifter to adjust the output power ratio of the coupler. For example, as Figure 3 shown, in the antenna device provided by the embodiment of the present application, the coupling module 200 may include: a first coupler 210, a first phase shifter 220, a second phase shifter 230, and a second coupler 240; wherein, the first coupler 210 has an input port P1, a through port P2', and a coupling port P3'; Among them, the second coupler has an input port P1', a through port P2, a coupling port P3, and an isolation port P4'. Among them, the radio frequency module 100 is connected to the input port P1 of the first coupler, and the through port P2' of the first coupler is connected to the input port P1' of the second coupler through the first phase shifter 220; the coupling port P3' of the first coupler is connected to the isolation port P4' of the second coupler through the second phase shifter 230. Among them, the through port P2 of the second coupler 240 is connected to the antenna module 300; the coupling port P3 of the second coupler 240 is connected to the impedance adjustment module 400.

[0031] Among them, the first coupler 210 also has an isolation port P4, and the isolation port P4 of the first coupler 210 is grounded through the load element R1.

[0032] In the embodiment of the present application, the first coupler 210, the first phase shifter 220, the second phase shifter 230, and the second coupler 240 can be regarded as a whole as an equivalent coupler, and the power distribution ratio of the equivalent coupler can be adjusted.

[0033] In the embodiment of the present application, the power distribution ratio of the coupling module 200 is associated with the phase of the first phase shifter 220 and the phase of the second phase shifter 230; the phase of the first phase shifter 220 and the phase of the second phase shifter 230 can be adjusted so that the power distribution ratio of the coupling module 200 can be adjusted.

[0034] In the embodiment of the present application, the power distribution ratio of the coupling module can be determined by the phase of the first phase shifter 220 and the phase of the second phase shifter 230. Therefore, by adjusting the phase of the first phase shifter 220 and the phase of the second phase shifter 230, the power distribution ratio of the coupling module can be changed.

[0035] For example, the phase of the first phase shifter 220 is adjusted by the voltage intensity indicated by the control signal DAC1 of the first phase shifter 220 ; the phase of the second phase shifter 230 is adjusted by the voltage intensity indicated by the control signal DAC2 of the second phase shifter 230 , thereby changing the power distribution ratio of the coupling module.

[0036] In this way, the embodiment of the present application can adjust the power distribution ratio of the coupling module by adjusting the phase of the first phase shifter 220 and the phase of the second phase shifter 230, thereby reducing the amplitude difference between the two reflected signals.

[0037] In a specific embodiment, in order to fully cancel the first reflected signal and the second reflected signal, the second coupler 240 may be a 90-degree quadrature coupler.

[0038] For example, referring to Figure 3 , the transmission signal output by the radio frequency module is input through the input port P1 of the first coupler 210. After passing through the first coupler 210, a part of the transmission signal passes from the through port P2' of the first coupler 210, passes through the first phase shifter 220, and enters the second coupler 240 through the input port P1' of the second coupler 240; another part of the transmission signal passes from the coupled port P3' of the first coupler 210, passes through the second phase shifter 230, and enters the second coupler 240 through the isolation port P4' of the second coupler 240.

[0039] Referring to Figure 4 , for a part of the transmission signal entering the second coupler 240 from the through port P2' of the first coupler 210, assuming that the impedance of the first antenna ANT0 changes due to the change of the external environment, a standing wave (i.e., a reflected voltage wave) is generated; Among them, denote the voltage wave reflected from the first antenna ANT0 ; Among them, denote the voltage wave reflected from the impedance adjustment module 400 end ; And Due to the function of the second coupler 240 being a 90° directional coupler, there is a natural 90° phase difference; Among them, the reflected voltage wave Reverses through the 90° directional coupler, and the voltage wave reaching the input port P1' of the second coupler 240 ; Among them, the reflected voltage wave Reverses through the 90° directional coupler, and the voltage wave reaching the input port P1' of the second coupler 240 ; Among them, the reflected signal finally reaching the input port P1' of the second coupler 240 ; In After passing through the first phase shifter 220 and the first coupler 210 and reaching the input port P1 of the first coupler 210, its reflected signal ; Among them, Is the voltage change amount of the reflected wave from the input port P1' of the second coupler 240 to the through port P2' of the first coupler 210.

[0040] In the case of impedance mismatch between the first antenna ANT0 and the RF module 100, the present application can adjust the phase of the first phase shifter 220 / second phase shifter 230 by adjusting the signal strength of the control signals DAC1 / DAC2 of the first phase shifter 220 / second phase shifter 230, so as to adjust the coupling coefficient of the equivalent coupler (the equivalent coupler is an integral composed of the first coupler, the second coupler, the first phase shifter, and the second phase shifter), thereby adjusting the power distribution ratio of ports P2 and P3, and further adjusting and the magnitude of, so that is approximately 0.

[0041] It can be understood that according to the knowledge of transmission lines, the voltage at any point on the transmission line = where , reflected wave, is the incident wave, so , so changing the magnitude of the incident wave can change the magnitude of the reflected wave, thereby adjusting the power distribution ratio of ports P2 and P3, and can change the magnitude of the transmitted signals at ports P2 and P3, thereby adjusting the amplitude of the reflected signal and the magnitude of.

[0042] Similarly, referring to Figure 5 , for another part of the transmitted signal entering the second coupler 240 from the coupling port P3' of the first coupler 210, assuming that the impedance of the first antenna ANT0 changes due to the change of the external environment, a standing wave is generated; Among them, the voltage wave reflected from the first antenna ANT0 is denoted as ; Among them, the voltage wave reflected from the impedance adjustment module 400 is denoted as ; Among them, and Due to the function of the 90° directional coupler, there is a natural 90° phase difference; Among them, the reflected voltage wave reverses through the 90° directional coupler and reaches the voltage wave at the isolation port P4' of the second coupler 240; Among them, the reflected voltage wave reverses through the 90° directional coupler and reaches the voltage wave at the isolation port P4' of the second coupler 240; Among them, the reflected signal finally reaching the isolation port P4' of the second coupler 240 is ; At After passing through the second phase shifter 230 and the first coupler 210 and reaching the input port P1 of the first coupler 210, its reflected signal .

[0043] Among them, is the voltage change amount of the reflected wave from the isolation port P4' of the second coupler 240 to the coupling port P3' of the first coupler 210.

[0044] In the case of impedance mismatch between the first antenna ANT0 and the RF module 100, the present application can adjust the signal strength of the control signals DAC1 / DAC2 of the first phase shifter 220 / second phase shifter 230, adjust the phase magnitude of the first phase shifter 220 / second phase shifter 230, so as to adjust the coupling coefficient of the equivalent coupler (the equivalent coupler is an overall composed of the first coupler, the second coupler, the first phase shifter, and the second phase shifter), thereby adjusting the power distribution ratio of the P2 port and the P3 port, and further adjusting and the magnitude of, so that is approximately 0.

[0045] In this way, by setting the second coupler 240 as a 90-degree quadrature coupler, after the first reflected signal and the second reflected signal pass through the second coupler 240 in the reverse direction, the phase difference between the first reflected signal and the second reflected signal is 180 degrees, so that the first reflected signal and the second reflected signal are fully cancelled out.

[0046] In addition, in a specific embodiment, in order to reduce the phase adjustment requirements of the first phase shifter 220 / second phase shifter 230, the output power of the through port P2' of the first coupler 210 is greater than the output power of the coupling port P3' of the first coupler 210.

[0047] Among them, the power distribution ratio of the first coupler is the ratio of the output power of the through port P2' of the first coupler 210 to the output power of the coupling port P3' of the first coupler 210.

[0048] The embodiment of the present application can set the first coupler 210 as a conventional coupler with a relatively large power distribution ratio (there is no requirement for whether it is 90° quadrature), that is, the output power of the through port P2' of the first coupler 210 is much greater than the power of the coupling port P3' of the first coupler 210.

[0049] In this case, the phase magnitudes of the first phase shifter 220 / second phase shifter 230 can be adjusted in any combination, and it is not required that the phases of the first phase shifter 220 and the second phase shifter 230 are the same.

[0050] In other words, the phases of the first phase shifter 220 and the second phase shifter 230 can be the same or different, and the present application does not make specific limitations.

[0051] For example, when the phase of the first phase shifter 220 is adjusted to 0°, the phase of the second phase shifter 230 can be any phase value between 0° and 360°; when the phase of the first phase shifter 220 is adjusted to 10°, the phase of the second phase shifter 230 can be any phase value between 0° and 360°, and so on. The phases of the first phase shifter 220 / second phase shifter 230 can be any phase combination.

[0052] It should be noted that since the output power of the through port P2' of the first coupler 210 is much greater than the power of the coupled port P3' of the first coupler 210, even if there is a standing wave reflected from the coupled port P3' of the first coupler 210 to the input port P1 of the first coupler 210 , due to this standing wave relative to the standing wave is very small and can be ignored.

[0053] In this way, in the application scenario where the first coupler 210 is a conventional coupler with a relatively large power distribution, the standing wave can be ignored. Referring to Figure 4 , by arbitrarily adjusting the signal strength of the control signals DAC1 / DAC2 of the first phase shifter 220 / second phase shifter 230, the power distribution ratio of the P2 port and the P3 port is adjusted, and then and are adjusted to make approximate to 0, so as to cancel the first reflection signal and the second reflection signal with each other.

[0054] Moreover, the phase magnitudes of the first phase shifter 220 / second phase shifter 230 can be adjusted in any combination, reducing the phase adjustment requirements for the first phase shifter 220 / second phase shifter 230.

[0055] In addition, in order to make the amplitude difference between the first reflection signal and the second reflection signal approximate to 0, the first coupler can be set in this application.

[0056] For example, in another specific embodiment, in order to further cancel the first reflection signal and the second reflection signal with each other, the first coupler 210 can be a 90-degree quadrature coupler, and the phases of the first phase shifter 220 and the second phase shifter 230 are the same.

[0057] Among them, when adjusting the phase of the first phase shifter 220 and the phase of the second phase shifter 230, it is ensured that the phases of the first phase shifter 220 and the second phase shifter 230 are the same. Refer to Table 1 below:

[0058] Table 1 For example, when the phase of the first phase shifter 220 is adjusted to 0°, the phase of the second phase shifter 230 can be adjusted to 0°; when the phase of the first phase shifter 220 is adjusted to 10°, the phase of the second phase shifter 230 can also be adjusted to 10°, and so on.

[0059] Among them, referring to Figure 4 and Figure 5 , by adjusting the signal strength of the control signals DAC1 / DAC2 of the first phase shifter 220 / second phase shifter 230, the phase of the first phase shifter 220 / second phase shifter 230 is adjusted, so as to adjust the power distribution ratio of ports P2 and P3, and then adjust and , and and ), so that + is approximately 0, and the first reflected signal and the second reflected signal are cancelled out with each other.

[0060] Specifically, according to the superposition theorem, the reflected signal .

[0061] It should be noted that since the first coupler 210 is a 90° quadrature coupler, and the phases of the first phase shifter 220 and the second phase shifter 230 are the same, then and have a 180° phase difference, then: .

[0062] In this way, since the power distribution ratio of the coupling module 200 is adjusted, , has been adjusted to be approximately 0, then has been approximately 0. Assuming that , has not been set to 0 yet and there is still a small part of voltage. Since and have a 180° phase difference, then finally is and subtracted in amplitude, and its amplitude will be even smaller, approximately 0.

[0063] In this way, compared with the previous method, by setting the first coupler 210 with a large power distribution ratio, the output power of the through port P2' of the first coupler 210 is much greater than the power of the coupling port P3' of the first coupler 210, so as to Compared with being negligible, the first coupler 210 can be set as a 90-degree orthogonal coupler, and the phases of the first phase shifter 220 and the second phase shifter 230 are the same, so that the reflected signal can be cancelled out in two stages. On the basis of cancelling out the reflected signals through the second coupler, the and amplitudes of are cancelled out with each other, further reducing the magnitude of the reflected wave.

[0064] In practical applications, the antenna module 300 can include a first antenna ANT0, and the impedance of the impedance adjustment module 400 can be adjusted. For example, in one example, the impedance adjustment module 400 can include a second antenna ANT1 (not shown in the figure). Or, in other examples, the impedance adjustment module 400 may not include an antenna, but is composed of matching units, and the impedance of the matching network and the load in the matching unit can have different values, which can simulate the impedance change process of the second antenna ANT1.

[0065] To expand the scope of technical applications, the impedance adjustment module 400 may not include an antenna, but is composed of matching units. For example, as Figure 3 shown, the impedance adjustment module 400 can include: a switching unit 410, a first matching unit 420, and a second matching unit 430; The second output port C of the coupling module is connected to the switching unit 410; the switching unit 410 is respectively connected to the first matching unit 420 and the second matching unit 430; Among them, the impedance of the first matching unit 420 matches the impedance of the RF module 100; the impedance of the second matching unit 430 does not match the impedance of the RF module 100.

[0066] Among them, as Figure 3 shown, the switching unit 410 can include a common terminal Com, a first moving terminal RF_1, and a second moving terminal RF_2; the second output port C of the coupling module 200 is connected to the common terminal Com of the switching unit 410; the first moving terminal RF_1 of the switching unit 410 is connected to the first matching unit 420; the second moving terminal RF_2 of the switching unit 410 is connected to the second matching unit 430.

[0067] Among them, when the impedance of the RF module 100 matches the impedance of the antenna module 300, no reflected signal is generated in the antenna module 300. At this time, by conducting the switching unit 410 and the first matching unit 420, no reflected signal is generated in the first matching unit 420.

[0068] Wherein, when the impedance of the RF module 100 does not match the impedance of the antenna module 300, a first reflection signal is generated within the antenna module 300. At this time, by conducting the switching unit 410 and the second matching unit 430, a second reflection signal is generated within the second matching unit 430, which is used to cancel the first reflection signal generated within the antenna module 300.

[0069] For example, as Figure 3 shown, the first matching unit 420 may include a first matching network NET1 and a first load unit R2; the first matching network NET1 is grounded through the first load unit R2.

[0070] Wherein, the first matching network NET1 and the first load unit R2 are in a completely matched state, and no standing wave is generated within the first matching unit 420.

[0071] Wherein, when the impedance of the RF module 100 matches the impedance of the antenna module 300, through the control signal of the switching unit 410, the switch is switched to the RF_1 terminal to conduct the switching unit 410 and the first matching unit 420. At this time, no standing wave is generated within the impedance adjustment module 400, avoiding interference to the antenna module 300 caused by the impedance adjustment module 400.

[0072] Again, for example, as Figure 3 shown, the second matching unit 430 may include a second matching network NET2 and a second load unit R3; the second matching network NET2 is grounded through the second load unit R3.

[0073] Wherein, the second matching network NET2 and the second load unit R3 are in a mismatched state, and standing waves are generated within the second matching unit 430.

[0074] Wherein, when the impedance of the RF module 100 does not match the impedance of the antenna module 300, through the control signal of the switching unit 410, the switch is switched to the RF_2 terminal to conduct the switching unit 410 and the second matching unit 430. At this time, a second reflection signal is generated within the impedance adjustment module 400 to cancel the first transmission signal generated within the antenna module 300.

[0075] In this way, by setting the impedance adjustment module 400 as the switching unit 410, the first matching unit 420, and the second matching unit 430, the impedance change of the impedance adjustment module 400 is realized. When any one of the antennas in the antenna device (for example, the first antenna ANT0) is mismatched with the RF module, a second reflection signal for canceling the first reflection signal is generated within the impedance adjustment module 400. Compared with the related art, there is no need for at least two antennas to perform the reflection wave cancellation scheme, which expands the scope of technical application and avoids the signal interference between at least two antennas.

[0076] Based on the same concept as the antenna device provided in any of the above embodiments, an embodiment of the present application further provides a radio frequency communication method, which is applied to the antenna device provided in the above embodiments.

[0077] For example, as Figure 6 shown, an embodiment of the present application provides a radio frequency communication method, which is applied to the antenna device as shown in Figure 3. The radio frequency communication method may include: Step 610: When the impedance of the antenna module is the first impedance, conduct the switching unit in the impedance adjustment module with the second matching unit; Step 620: By adjusting the power distribution ratio of the coupling module, reduce the amplitude difference between the first reflection signal and the second reflection signal; Wherein, the first impedance is mismatched with the impedance of the RF module.

[0078] Wherein, when the antenna device is in the first service scenario (for example, an antenna impedance change scenario such as a human hand scenario, a head-hand scenario, a SAR Sensor trigger, etc.; the human hand scenario and the head-hand scenario can be triggered and sensed through games, phone calls, etc.), the switching unit switches to the RF_2 port, so that the switching unit is conducted with the second matching unit. At this time, the second matching unit end is in a mismatched state, and the second reflection signal . In this case, through DAC1 and DAC2, start dynamically adjusting the power distribution ratio of the coupling module, and then adjust and the magnitudes of, reduce the amplitude difference between the first reflection signal and the second reflection signal. Ideally, can be approximated to 0, the reflection is minimized, and the influence of the mismatch is minimized.

[0079] In this way, for the radio frequency communication method provided by the embodiments of the present application, when the impedance of the antenna module is the first impedance, the switching unit in the impedance adjustment module is conducted with the second matching unit; by adjusting the power distribution ratio of the coupling module, the amplitude difference between the first reflected signal and the second reflected signal is reduced. In this way, in the process of coupling the two reflected signals of the antenna module and the impedance adjustment module by using the coupling module, the adjustment of the amplitude difference between the two reflected signals is realized by using the power distribution ratio adjustment technology of the coupling module. Before and after adjusting the power distribution ratio, the amplitude difference between the two reflected signals is reduced, so that the impedance mismatch phenomenon between the radio frequency end and the antenna end can be minimized.

[0080] In a specific embodiment, in order to adjust the power distribution ratio of the coupling module, in the above step 620, by adjusting the power distribution ratio of the coupling module to reduce the amplitude difference between the first reflected signal and the second reflected signal, it may specifically include: When the coupling module includes a first phase shifter and a second phase shifter, by adjusting the phases of the first phase shifter and the second phase shifter to a target phase value to adjust the power distribution ratio of the coupling module; wherein, the target phase value is obtained based on the RSRP (Reference Signal Received Power) detected by the base station side.

[0081] In the embodiments of the present application, the power distribution ratio of the coupling module can be determined by the phase of the first phase shifter and the phase of the second phase shifter Therefore, by adjusting the phase of the first phase shifter and the phase of the second phase shifter, the power distribution ratio of the coupling module can be changed.

[0082] For example, by the voltage intensity indicated by the control signal DAC1 of the first phase shifter, the phase of the first phase shifter is adjusted ; by the voltage intensity indicated by the control signal DAC2 of the second phase shifter, the phase of the second phase shifter is adjusted , thereby changing the power distribution ratio of the coupling module.

[0083] In this way, the embodiments of the present application can adjust the power distribution ratio of the coupling module by adjusting the phase of the first phase shifter and the phase of the second phase shifter, thereby reducing the amplitude difference between the two reflected signals.

[0084] In addition, when the antenna module is matched with the radio frequency module, in order to avoid the influence of the reflected signal generated by the impedance adjustment module on the antenna signal, the radio frequency communication method provided by the embodiments of the present application may further include: Step 630: When the impedance of the antenna module is the second impedance, turn on the switching unit in the impedance adjustment module to conduct with the first matching unit; Wherein, the second impedance is matched with the impedance of the RF module.

[0085] Wherein, the above step 630 may be executed before step 610, or after step 620, and the present application does not limit this.

[0086] In this way, in a free space scenario, the impedance of the antenna module is the second impedance, and the antenna module is conjugate-matched with the RF module. At this time, turn on the switching unit in the impedance adjustment module to conduct with the first matching unit, and no reflected signal is generated in the impedance adjustment module, which can avoid the influence of the reflected signal generated by the impedance adjustment module on the antenna signal.

[0087] In practical applications, taking the case where the antenna device is set on mobile electronic devices such as mobile phones and tablet computers as an example for illustration, as Figure 7 shown, an embodiment of the present application provides a radio frequency communication method, which may include the following steps: Step 701: Detect the initial state; Step 702: Determine whether the initial state is conjugate-matched; wherein, if the RF module and the antenna module are not matched in the initial state, then execute step 703 until the RF module and the antenna module are conjugate-matched in the initial state; otherwise, execute step 704; Step 703: Match the initial state and record the initial values of DAC1 / DAC2 in the initial state; Step 704: Determine whether the first service scenario is triggered; wherein, if not triggered, then execute step 705, otherwise execute step 706; Step 705: Keep the DAC1 / DAC2 value unchanged and switch the switching unit to RF_1; Step 706: Switch the switching unit to RF_2, and the phases of the first phase shifter / second phase shifter are linearly adjusted following DAC1 / DAC2; Step 707: The base station side records the RSRP values before and after the adjustment of the DAC1 / DAC2 values; Step 708: Traverse Table 1, and the base station transmits the set of DAC1 / DAC2 values with the maximum RSRP value to the mobile phone; Step 709: Adjust the phases of the first phase shifter / second phase shifter according to this set of DAC1 / DAC2 values; Step 710: Determine whether the first service scenario ends; if it ends, then execute step 711, otherwise execute step 706; Step 711: Restore DAC1 / DAC2 to the initial values.

[0088] Among them, the matching and debugging process described in steps 701 to 703 can be the debugging work before the mobile phone leaves the factory. After the mobile phone leaves the factory, the initial values of DAC1 and DAC2 are no longer adjusted.

[0089] Among them, the mismatch debugging process described in steps 701 to 704 can be the application scenarios at the user end after the mobile phone leaves the factory.

[0090] Among them, in step 705, in a free space scenario, the switching unit switches to the RF_1 port. At this time, the impedance adjustment module 400 end is in a matching state, and the reflected wave , DAC1 and DAC2 are fixed values. This state is the initial state of the ANT0 antenna. At this time, the radio frequency impedance is conjugate-matched with the ANT0 antenna impedance, and there is no reflection.

[0091] Among them, in steps 706 to 709, when the mobile phone is in the first service scenario (for example, antenna impedance change scenarios such as the human hand scenario, the head-hand scenario, and the SAR Sensor trigger; the human hand scenario and the head-hand scenario can be triggered by games, phone calls, etc.), the switching unit switches to the RF_2 port. At this time, the impedance adjustment module 400 end is in a mismatched state, and the reflected wave , DAC1 and DAC2 start to dynamically adjust the power distribution ratio of the equivalent coupler, and then adjust and the magnitude of, so that is approximately 0, the reflection is minimized, and the impact of the mismatch is minimized.

[0092] In this way, in the case of the minimum radio frequency antenna mismatch, the radio frequency power is radiated from the antenna to the greatest extent, so the antenna TRP is also the largest, and thus the base station-side RSRP is also the largest. Dynamic adjustment can be made based on this point.

[0093] The radio frequency communication method provided by the embodiments of the present application can dynamically adjust the mobile phone parameters according to changes in the external environment, so that the radio frequency and the antenna continuously maintain conjugate matching and transmit with the maximum power, improving the user experience.

[0094] Moreover, it can also reduce the power consumption of the mobile phone. During the actual communication process of the mobile phone, the transmission power of the PA (power amplifier) is dynamically regulated by the base station side. When the base station side detects a poor signal, in order to maintain the communication experience, it requires the PA to output a high power. When the base station side detects a good signal, it only requires the PA to output a low power. Since the radio frequency antenna mismatch is eliminated in the radio frequency communication method provided by the embodiments of the present application, compared with the conventional method, the output power can be reduced, and thus the power consumption of the mobile phone can be reduced.

[0095] For example, under poor signal conditions, the base station requires the output power from the port of the mobile phone RF test socket to the antenna end to be 27 dbm to meet the communication requirements. In the conventional method, due to the mismatch between the RF antenna and the PA, the output power of the PA may reach 30 dbm. In this embodiment, since the degree of RF antenna mismatch is reduced, the output of the PA output port is 29 dbm to meet the requirements. 29 dbm < 30 dbm. On the premise of meeting the requirements of the base station side, the output power of the PA side is reduced, thereby reducing the power consumption of the mobile phone and increasing the standby time.

[0096] Based on the same concept as the antenna device provided in any of the above embodiments, the embodiment of the present application further provides an electronic device. As Figure 8 shown, the embodiment of the present application provides an electronic device 800, including the antenna device 10 provided in any of the above embodiments.

[0097] It should be noted that the electronic device provided in the embodiment of the present application includes the antenna device provided in any of the above embodiments, and can implement all the functions of the antenna device. To avoid repetition, it will not be described in detail here.

[0098] In the embodiment of the present application, the electronic device may be a terminal or other devices other than the terminal. Exemplarily, the electronic device may be a smart watch, a mobile phone, a tablet computer, a notebook computer, a handheld computer, a vehicle-mounted electronic device, a Mobile Internet Device (MID), an augmented reality (AR) / virtual reality (VR) device, a robot, a wearable device, an ultra-mobile personal computer (UMPC), a netbook, or a personal digital assistant (PDA), etc., or may also be a server, a Network Attached Storage (NAS), a personal computer (PC), etc. The embodiment of the present application does not make a specific limitation.

[0099] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

[0100] Although embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present application. The scope of the present application is defined by the claims and their equivalents.

Claims

1. An antenna device, characterized in that: include: RF module, coupling module, antenna module and impedance adjustment module; The coupling module has an input port, a first output port, and a second output port; The radio frequency module is connected to the input port of the coupling module, the first output port of the coupling module is connected to the antenna module, and the second output port of the coupling module is connected to the impedance adjustment module; In which, the coupling module has a first state and a second state, and the amplitude difference between the first reflected signal and the second reflected signal in the second state is smaller than the amplitude difference between the first reflected signal and the second reflected signal in the first state; the first reflected signal is obtained based on the transmitted signal output by the RF module to the antenna module; and the second reflected signal is obtained based on the transmitted signal output by the RF module to the impedance adjustment module.

2. The antenna device according to claim 1, characterized in that The first state is the state of the coupling module before the power allocation ratio is adjusted, and the second state is the state of the coupling module after the power allocation ratio is adjusted; wherein the power allocation ratio is the ratio of the output power of the first output port of the coupling module to the output power of the second output port of the coupling module; wherein, in the second state, the amplitude difference between the first reflected signal and the second reflected signal is 0.

3. The antenna device according to claim 2, characterized in that The coupling module includes a first coupler, a first phase shifter, a second phase shifter and a second coupler; the first coupler has an input port, a through port and a coupling port; the second coupler has an input port, a through port, a coupling port and an isolation port; the RF module is connected to the input port of the first coupler, and the through port of the first coupler is connected to the input port of the second coupler through the first phase shifter; the coupling port of the first coupler is connected to the isolation port of the second coupler through the second phase shifter; the through port of the second coupler is connected to the antenna module; and the coupling port of the second coupler is connected to the impedance adjustment module.

4. The antenna device according to claim 3, characterized in that: The power allocation ratio of the coupling module is associated with the phase of the first phase shifter and the phase of the second phase shifter; the phase of the first phase shifter and the phase of the second phase shifter are adjustable, so that the power allocation ratio of the coupling module is adjustable.

5. The antenna device according to claim 3, characterized in that: The second coupler is a 90-degree orthogonal coupler.

6. The antenna device according to any one of claims 3 to 5, characterized in that: The output power of the through port of the first coupler is greater than the output power of the coupled port of the first coupler.

7. The antenna device according to any one of claims 3 to 5, characterized in that: The first coupler is a 90-degree orthogonal coupler, and the first phase shifter and the second phase shifter have the same phase.

8. The antenna device according to any one of claims 1 to 5, characterized in that: The impedance adjustment module includes a switching unit, a first matching unit and a second matching unit; The second output port of the coupling module is connected to the switching unit; the switching unit is connected to the first matching unit and the second matching unit respectively; The impedance of the first matching unit matches the impedance of the RF module; the impedance of the second matching unit does not match the impedance of the RF module.

9. The antenna device according to claim 8, characterized in that: The first matching unit includes a first matching network and a first load unit; the first matching network is grounded through the first load unit.

10. The antenna device according to claim 8, characterized in that: The second matching unit includes a second matching network and a second load unit; the second matching network is grounded through the second load unit.

11. An electronic device, characterized in that: Comprising the antenna device according to any one of claims 1-9.

12. A radio frequency communication method, applied to the antenna device according to claim 8, characterized in that: The method comprises: When the impedance of the antenna module is the first impedance, connecting the switching unit and the second matching unit in the impedance adjustment module; Reducing the amplitude difference between the first reflected signal and the second reflected signal by adjusting the power allocation ratio of the coupling module; The first impedance does not match the impedance of the RF module.

13. The method according to claim 12, characterized in that The reducing the amplitude difference between the first reflected signal and the second reflected signal by adjusting the power allocation ratio of the coupling module comprises: In a case where the coupling module includes a first phase shifter and a second phase shifter, adjusting the power allocation ratio of the coupling module by adjusting the phase of the first phase shifter and the phase of the second phase shifter to a target phase value; The target phase value is obtained based on the reference signal received power RSRP detected at the base station side.

14. The method according to claim 12, characterized in that The method further comprises: When the impedance of the antenna module is the second impedance, connecting the switching unit in the impedance adjustment module to the first matching unit; The second impedance matches the impedance of the RF module.

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