Radio frequency device, radio frequency system and communication equipment

Abstract

The invention relates to a radio frequency device, a radio frequency system and communication equipment. The radio frequency device is provided with a first transmitting port, a second transmitting port, a tuning control port, a first antenna port used for being connected with a first antenna, and a second antenna port used for being connected with a second antenna. In the radio frequency device, a first transmitting circuit and a second transmitting circuit amplify a radio frequency signal to be transmitted, and a gating-based tuning circuit is correspondingly connected with the output end of the first transmitting circuit, the output end of the second transmitting circuit, a tuning control port, a first antenna port and a second antenna port. And the gating tuning circuit selects to transmit the radio frequency signal output by the first transmitting circuit or the second transmitting circuit through a target antenna connected with the target antenna port, and changes the tuning parameter of the gating tuning circuit according to the received tuning signal, so as to adjust the impedance position of the target antenna connected with the target antenna port. Miniaturization design and energy consumption control are considered, and the overall communication performance is improved.

Description

Technical Field

[0001] The present invention relates to the field of radio frequency technology, and in particular to a radio frequency device, a radio frequency system and a communication device. Background Art

[0002] With the development of communication networks, the requirements for data transmission efficiency during communication of electronic devices are getting higher and higher. To meet this demand, it is often achieved by adding a radio frequency module to the radio frequency front end, which poses new challenges to the miniaturization design of electronic devices. Summary of the invention

[0003] The embodiments of the present application provide a radio frequency device, a radio frequency system and a communication device, which can achieve both communication reliability and miniaturization design.

[0004] In a first aspect, a radio frequency device is provided, wherein the radio frequency device is configured with a first transmitting port, a second transmitting port, and a tuning control port, a first antenna port for connecting to a first antenna, and a second antenna port for connecting to a second antenna, the radio frequency device comprising:

[0005] A first transmitting circuit, wherein an input end of the first transmitting circuit is connected to the first transmitting port, and is used to support amplification processing of a target radio frequency signal from the first transmitting port;

[0006] A second transmitting circuit, wherein an input end of the second transmitting circuit is connected to the second transmitting port, and is used to support amplification processing of a target radio frequency signal from the second transmitting port;

[0007] The gating tuning circuit is respectively connected to the output end of the first transmitting circuit, the output end of the second transmitting circuit, the tuning control port, the first antenna port and the second antenna port. The gating tuning circuit is used to select the radio frequency signal output by the first transmitting circuit or the second transmitting circuit to be transmitted through the target antenna connected to the target antenna port, and to change the tuning parameters of the gating tuning circuit according to the received tuning signal so as to adjust the impedance position of the target antenna connected to the target antenna port; wherein the tuning signal is related to the power of the radio frequency signal output by the first transmitting circuit or the second transmitting circuit, and the target antenna port is one of the first antenna port and the second antenna port.

[0008] In a second aspect, a radio frequency system is provided, the radio frequency system comprising:

[0009] The above-mentioned radio frequency devices;

[0010] The processing circuit is respectively connected to the first transmitting port, the second transmitting port, and the tuning control port. The processing circuit is configured to generate and output a tuning signal to the tuning control port according to a received power test signal, wherein the power test signal is used to reflect the power of the radio frequency signal output by the first transmitting circuit or the second transmitting circuit.

[0011] In a third aspect, a communication device is provided, comprising the radio frequency system as described above.

[0012] The above-mentioned RF device, RF system and communication equipment form a first transmitting circuit connected to the first transmitting port and a second transmitting circuit connected to the second transmitting port on the RF device, and are provided with a gating tuning circuit connected to the first antenna port and the second antenna port. The gating tuning circuit builds a connection path between the first transmitting circuit and the second transmitting circuit and the first antenna and the second antenna. Based on its gating function, the gating tuning circuit can support dual transmission of the target RF signal, improve communication performance, and is conducive to miniaturized design. In addition, the gating tuning circuit can change its tuning parameters under the action of the tuning signal to adjust the impedance position of the target antenna used to transmit the RF signal. The RF device supports adaptive tuning in various operating scenarios and optimizes its own operating state, thereby ensuring the overall performance of the communication equipment and taking into account low energy consumption and product miniaturization design. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0014] Figure 1 This is one of the structural schematic diagrams of a radio frequency device according to an embodiment;

[0015] Figure 2 A schematic diagram of the structure of a gating tuning circuit in a radio frequency device according to an embodiment;

[0016] Figure 3 This is a second structural schematic diagram of a radio frequency device according to an embodiment;

[0017] Figure 4 This is a third structural diagram of a radio frequency device according to an embodiment;

[0018] Figure 5 This is a fourth structural diagram of a radio frequency device according to an embodiment;

[0019] Figure 6 This is a fifth structural diagram of a radio frequency system according to an embodiment;

[0020] Figure 7 This is a sixth structural diagram of a radio frequency system according to an embodiment;

[0021] Figure 8 The seventh structural diagram of the radio frequency system of an embodiment;

[0022] Fig. 9 This is an eighth structural diagram of a radio frequency system according to an embodiment;

[0023] Fig.10 A ninth structural diagram of a radio frequency system according to an embodiment;

[0024] Fig.11 This is one of the structural schematic diagrams of a radio frequency system according to an embodiment;

[0025] Fig.12 A schematic diagram of a flow chart of steps executed under a processing circuit configuration of an embodiment;

[0026] Fig.13 is a schematic diagram of a Smith chart according to an embodiment;

[0027] Fig.14 A schematic diagram of the circuit structure of a test model of an embodiment;

[0028] Fig.15 A simulation waveform diagram obtained based on a test model in one embodiment;

[0029] Fig.16 This is a second structural diagram of a radio frequency system according to an embodiment;

[0030] Fig.17 This is a third structural diagram of a radio frequency system according to an embodiment;

[0031] Fig.18 This is a fourth structural diagram of a radio frequency system according to an embodiment;

[0032] Fig.19 This is one of the structural schematic diagrams of a radio frequency receiving device in a radio frequency system of an embodiment;

[0033] Fig. 20 This is a second structural schematic diagram of a radio frequency receiving device according to an embodiment;

[0034] Fig.21 This is a third structural diagram of a radio frequency receiving device according to an embodiment;

[0035] Fig. 22 This is a fifth structural diagram of a radio frequency system according to an embodiment;

[0036] Fig.23 This is a sixth structural diagram of a radio frequency system according to an embodiment;

[0037] Fig.24 A schematic diagram of the structure of a communication device according to an embodiment;

[0038] Fig.25 A schematic diagram of a communication device according to an embodiment. DETAILED DESCRIPTION

[0039] In order to facilitate the understanding of the present application, in order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application, and the preferred embodiments of the present application are given in the accompanying drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thoroughly understood. The present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0040] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0041] The radio frequency system involved in the embodiment of the present application can be applied to a communication device with a wireless communication function, and the communication device can be a handheld device, a vehicle-mounted device, a wearable device, a computing device, or other processing devices connected to a wireless modem, as well as various forms of user equipment (UE) (e.g., a mobile phone), a mobile station (MS), etc. For the convenience of description, the above-mentioned devices are collectively referred to as communication devices.

[0042] like Figure 1 As shown, the present application provides a radio frequency device 10, which is configured with a first transmitting port RFIN1, a second transmitting port RF IN2, and a tuning control port CTR, which is used to connect a first antenna port A0 of a first antenna, and a first antenna port A1 of a second antenna. The radio frequency device 10 includes a first transmitting circuit 12, a second transmitting circuit 14, and a gating tuning circuit 16.

[0043] The input end of the first transmitting circuit 12 is connected to the first transmitting port RF IN1, and is used to support amplification of the target RF signal from the first transmitting port RF IN1. The input end of the second transmitting circuit 14 is connected to the second transmitting port RF IN2, and is used to support amplification of the target RF signal from the second transmitting port RF IN2.

[0044] The first transmitting circuit 12 and the second transmitting circuit 14 refer to circuits that can power amplify radio frequency signals and transmit the amplified signals. The first transmitting circuit 12 and the second transmitting circuit 14 can respectively receive radio frequency signals generated by the processing circuit from the first transmitting port RFIN1 and the second transmitting port RF IN2, and power amplify the received radio frequency signals to transmit the power-amplified radio frequency signals to the selection tuning circuit and then to the ANT0 or ANT1 antenna, and transmit them through the antenna. Among them, the radio frequency signal can be a signal of a network standard such as GSM (Global System for Mobile Communications), UMTS (Universal Mobile Telecommunications System), LTE (Long Term Evolution) and 5GNR (New Radio), and each network standard may include multiple frequency bands. Optionally, taking the 5GNR network standard as an example, the 5GNR signal includes a low frequency signal, an intermediate frequency signal, a high frequency signal and an ultra-high frequency signal, and the frequency band division of the low frequency signal, the intermediate frequency signal, the high frequency signal and the ultra-high frequency signal can refer to the following table.

[0045]

[0046] The gating tuning circuit 16 is respectively connected to the output end of the first transmitting circuit 12, the output end of the second transmitting circuit 14, the tuning control port CTR, the first antenna port A0 and the first antenna port A1. That is, the gating tuning circuit 16 is arranged on the transmission path between the first transmitting circuit 12, the second transmitting circuit 14 and the first antenna and the second antenna respectively, and the gating tuning circuit 16 is used to select the radio frequency signal output by the first transmitting circuit 12 or the second transmitting circuit 14 to be transmitted through the target antenna connected to the target antenna port. The target antenna port is one of the first antenna port A0 and the first antenna port A1.

[0047] The gating tuning circuit 16 is used to change the tuning parameters of the gating tuning circuit 16 according to the tuning signal output by the received tuning control port, so as to adjust the impedance position of the target antenna connected to the target antenna port. The impedance of the gating tuning circuit 16 can be adjusted by adjusting the tuning parameters of the gating tuning circuit 16, and then the impedance of the transmission path can be adjusted to improve the transmission performance of the antenna. Among them, the tuning signal is related to the power of the radio frequency signal output by the first transmitting circuit 12 or the second transmitting circuit 14. For example, the tuning signal can be determined by the processing circuit according to the power test signal collected by the built-in or external power detection circuit of the radio frequency device 10. Among them, the power test signal can reflect the power of the radio frequency signal output by the first transmitting circuit 12 or the second transmitting circuit 14. The processing circuit can input the tuning signal to the port CTR through the port D1.

[0048] The RF device 10 provided in the embodiment of the present application forms a first transmitting circuit 12 connected to the first transmitting port RFIN1 and a second transmitting circuit 14 connected to the second transmitting port RF IN2 on the RF device 10, and is provided with a gating tuning circuit 16 connected to the first antenna port A0 and the first antenna port A1. The gating tuning circuit 16 builds a connection path between the first transmitting circuit 12 and the second transmitting circuit 14 and the first antenna and the second antenna. The gating tuning circuit 16 can support the dual transmission of the target RF signal based on its gating function, improve the communication performance, and integrate the first transmitting circuit 12 and the second transmitting circuit 14 inside the device, which can reduce the insertion loss and area of ​​the external plug-in and reduce the cost. In addition, the gating tuning circuit 16 can change its tuning parameters under the action of the tuning signal, adjust the impedance position of the target antenna used to transmit the RF signal, and the RF device 10 supports adaptive tuning in various operating scenarios, optimizes its own operating state, thereby ensuring the overall performance of the communication equipment, taking into account low energy consumption and product miniaturization design.

[0049] The frequency bands of the target RF signal transmitted by the first transmitting circuit 12 and the target RF signal transmitted by the second transmitting circuit 14 may be at least partially the same or different. When the frequency bands of the target RF signals on the two transmission paths overlap at least partially, the RF device 10 supports MIMO (Multiple-Input Multiple-Output) dual transmission of the RF signals in the overlapping frequency bands.

[0050] In one embodiment, if Figure 2 As shown, the gate tuning circuit 16 has a plurality of first terminals (eg, Figure 2 1-11) and a plurality of second terminals (eg, Figure 2The multiple first ends of the strobe tuning circuit 16 are respectively connected to the output end of the first transmitting circuit 12, and the multiple second ends of the strobe tuning circuit 16 are respectively connected to the first antenna port A0 and the second antenna port A1.

[0051] The gate tuning circuit 16 includes a closed-loop tuning circuit 162 and a gate switch 164, wherein multiple first ends of the gate switch 164 serve as multiple first ends of the gate tuning circuit 16, and multiple second ends of the gate switch 164 serve as multiple second ends of the gate tuning circuit 16. Multiple first ends of the closed-loop tuning circuit 162 are respectively connected to multiple first ends of the selection switch 164, and multiple second ends of the closed-loop tuning circuit 162 are respectively connected to multiple second ends of the gate switch 164.

[0052] The closed-loop tuning circuit 162 has multiple tuning states, and the impedance of the closed-loop tuning circuit 162 in each tuning state is different. The closed-loop tuning circuit 162 is used to be in different tuning states under the action of the tuning signal.

[0053] The gating switch 164 is used to select and conduct the path between one of the output terminals of the first transmitting circuit 12 and the first antenna port A0, and the path between the other output terminal of the first transmitting circuit 12 and the second antenna port A1, so as to support the dual-path transmission of the output signal of the first transmitting circuit 12. Based on the connection relationship between the gating switch 164 and the closed-loop tuning circuit 162, the closed-loop tuning circuit 162 tunes the radio frequency signals transmitted by the first transmitting circuit 12 to the first antenna port A0 and the second antenna port A1, respectively, to achieve impedance adjustment of the transmitting path.

[0054] The closed-loop tuning circuit 162 can be composed of many switches (such as SW1, SW12, SW2, SW21, SW3., SW4., etc. in the figure. It should be understood that the figure only shows some switches and is not limited to the number and connection method of the switches in the figure) and capacitors and inductors connected to the external RF port to form different combinations, that is, different tuning states. The impedance of the closed-loop tuning circuit 162 in each tuning state is different. Therefore, the tuning state of the closed-loop tuning circuit 162 can be adjusted according to the real-time impedance position and the target impedance position to achieve impedance adjustment of the transmission path, and then adjust the impedance position of the load, thereby optimizing the operating state of the RF device 10.

[0055] The closed-loop tuning circuit 162 may include a plurality of first terminals and a plurality of second terminals, wherein the plurality of first terminals (eg, Figure 2 The contact a1 and the contact a2 in the embodiment may be connected to a plurality of first terminals (eg, Figure 2 Any two of the contacts 1 to 11 in the closed-loop tuning circuit 162, multiple second terminals (for example, Figure 2The contact b1 and the contact b2 in the embodiment may be connected to a plurality of second terminals (eg, Figure 2 The contact 12 and the contact 13 in the circuit), the gating function of the transmitting path can be realized based on the gating switch 164, and the tuning of the transmitting path can be realized based on the closed-loop tuning circuit 162.

[0056] When the load impedance of the communication device used by the RF device 10 changes, such as when the antenna of the communication device is touched by the human body or other metal objects in scenarios such as horizontal screen games, hand-held, and USB charging, the passive position of the antenna will be affected. At this time, the power consumption and performance of the communication device are seriously affected, resulting in performance degradation or increased power consumption. By setting a closed-loop tuning circuit with controllable tuning parameters between the first transmitting circuit 12, the second transmitting circuit 14 and the first antenna port A0 and the second antenna port A1, when transmitting a radio frequency signal through the first antenna port A0 or the second antenna port A1, the selection tuning circuit 16 can adjust the tuning parameters according to the tuning signal, thereby adjusting the VSWR (Voltage Standing Wave Ratio) and phase of the load, so that it is optimized in the direction of better current, optimizing antenna performance and power consumption, and improving battery life.

[0057] It should be noted that Figure 2 The figure only shows a structure of the gating and tuning circuit 16, but the number of the first end and the second end is not limited by the figure. In practical application, the number of the second end of the gating and tuning circuit 16 can be determined according to the number of antennas connected to it, and the number of the first end of the gating and tuning circuit 16 can be determined according to the number of output ends of the first transmitting circuit 12 and the number of output ends of the second transmitting circuit 14 corresponding to it. The contact point examples such as the contact point a1 and the contact point a2 given in the above embodiment are also intended to help those skilled in the art understand the implementation of the gating function and the tuning function of the gating and tuning circuit 16, and do not limit the number of contacts.

[0058] In one embodiment, if Figure 3 As shown, the RF device 10 is further configured with a power feedback port CPL OUT, and the RF device also includes a power detection circuit 18 .

[0059] The power detection circuit 18 is connected to the power feedback port, and is used to couple the radio frequency signal transmitted through the first antenna port (A0 port) or the second antenna port (A1 port), and output the forward coupling signal and the reverse coupling signal to the processing circuit (which can be input to the processing circuit through the D2 port shown in the figure), so that the processing circuit 20 generates and outputs the tuning signal to the tuning control port CTR according to the forward coupling signal and the reverse coupling signal. The tuning control port acts on the strobe tuning circuit 16.

[0060] Among them, the power detection circuit 18 can be implemented by a coupler, and two couplings can be set to respectively detect the power of the radio frequency signal transmitted through the first antenna port and the radio frequency signal transmitted through the second antenna port. The coupling of each path can be achieved by setting a coupler in the forward feedback channel to feed back the forward coupling signal, and setting a coupler in the reverse feedback channel to feed back the reverse coupling signal; the forward feedback channel and the reverse feedback channel can also share a coupler, that is, a bidirectional coupler is used to feed back the forward coupling signal and the reverse coupling signal. The forward coupling signal can be a part of the transmitted signal, and can have the same frequency and phase as the transmitted signal; the reverse coupling signal is a signal that is reflected by the antenna but not transmitted. Based on the forward coupling signal and the reverse coupling signal, the reflection characteristic parameters, such as the voltage standing wave ratio, can be calculated.

[0061] By integrating the power detection circuit 18 inside the RF device 10, the insertion loss of the external plug-in can be reduced and the area can be reduced, which is conducive to reducing costs. After integration, the RF device 10 provided in the embodiment of the present application can also achieve matching between various parts inside the RF device, reduce port mismatch, and thus improve antenna performance.

[0062] In one embodiment, if Figure 3 As shown, the power detection circuit 18 includes a two-way bidirectional coupler.

[0063] The dual-way bidirectional coupler is coupled to the selection tuning circuit 16, the first antenna port A0, and the second antenna port A1 respectively, and is used to couple the RF signal transmitted by the first antenna ANT0 or the second antenna ANT1 to output a forward coupling signal and a reverse coupling signal.

[0064] The dual-path bidirectional coupler can couple with the signals on the two transmission paths to detect the power on the two transmission paths, thereby providing data basis for tuning the selection tuning circuit 16 .

[0065] In one embodiment, if Figure 4 As shown, the two-way bidirectional coupler has a first coupling end and a second coupling end coupled to the selection tuning circuit 16, a third coupling end coupled to the first antenna port A0, a fourth coupling end coupled to the second antenna port A1, and an output end. The two-way bidirectional coupler includes: a first bidirectional coupler 182, a second bidirectional coupler 184, and a first switching circuit 186.

[0066] Among them, the first bidirectional coupler 182 is coupled and connected to the first coupling end and the third coupling end respectively, and the first bidirectional coupler 182 is used to couple the radio frequency signal transmitted by the first antenna ANT0 to output a forward coupling signal and a reverse coupling signal. The second bidirectional coupler 184 is coupled and connected to the second coupling end and the fourth coupling end respectively, and the second bidirectional coupler 184 is used to couple the radio frequency signal transmitted by the second antenna ANT1 to output a forward coupling signal and a reverse coupling signal. The multiple first ends of the first switch circuit 186 are respectively connected to the two coupling output ends of the first bidirectional coupler 182 and the two coupling output ends of the second bidirectional coupler 184, and the second end of the first switch circuit 186 is connected to the power feedback port CPLOUT. The number of connection ends of the first switch circuit 186 is determined according to the access requirements of its input and output signals, and is not limited here.

[0067] In one embodiment, if Figure 5 As shown, the first transmitting circuit 12 includes: a first transmitting unit 122 and a first filtering unit 124 .

[0068] The input end of the first transmitting unit 122 is connected to the first transmitting port to support amplification of the RF signal from the first transmitting port. The first transmitting unit 122 can support power amplification of target RF signals of one or more frequency bands. For example, the first transmitting unit 122 can support power amplification of RF signals of at least two frequency bands among a low frequency band, a medium frequency band, a high frequency band, or an ultra-high frequency band.

[0069] One end of the first filtering unit 124 is connected to the output end of the first transmitting unit 122 and the other end is connected to the selection tuning circuit 16. The first filtering unit 124 is used to filter the RF signal output by the first transmitting unit 122 and select the target RF signal to be output to the selection tuning circuit 16.

[0070] The first filtering unit 124 is used to support filtering of a target RF signal of at least one frequency band, allowing the target RF signal to pass through and transmit it to the gating tuning circuit 16, and output from the first antenna port A0 or the second antenna port A1 through the gating tuning circuit 16.

[0071] In one embodiment, the first filtering unit 124 can support the transmission of target RF signals in multiple frequency bands, for example, Figure 6 As shown, the first filtering unit 124 can support the transmission of RF signals of at least frequency bands including B8, B12, B20, B26, B28, etc. It should be understood that since the frequency band range of 4G LTE and 5G NR is the same, the first filtering unit 124 can also support the transmission of RF signals of frequency bands such as N8 and N28.

[0072] In one embodiment, if Figure 6-Figure 8 As shown, the second transmitting circuit 14 includes: a second transmitting unit 142 and a second filtering unit 144 .

[0073] The input end of the second transmitting unit 142 is connected to the second transmitting port (eg, Figure 6 The second filter unit 144 is connected to the output end of the second transmitting unit 142 at one end, and connected to the gate tuning circuit 16 at the other end. The second filter unit 144 is used to filter the RF signal output by the second transmitting unit 142 and output the target RF signal to the gate tuning circuit 16.

[0074] The function of the second transmitting unit 142 can be understood by referring to the function of the first transmitting unit 122 in the above embodiment. The second filtering unit 144 can filter the target RF signal of at least one frequency band and transmit the filtered signal to the gate tuning circuit 16. For example, Figure 8 As shown, the second transmitting unit 142 can amplify the target RF signal in the B28 frequency band and transmit the amplified signal to the second filtering unit 144 for filtering. After the filtered target RF signal in the B28 frequency band is connected to the contact 10 of the selection tuning circuit, it is emitted outward from the first antenna port LB ANT0 or the second antenna port LB ANT1.

[0075] In one embodiment, if Figure 8 As shown, the second filtering unit 144 includes: a first filter (for example, Figure 8 The filter connected to B28 TX1 in the figure).

[0076] The first end of the first filter is connected to the output end of the second transmitting unit 142, and the second end of the first filter is connected to the gate tuning circuit 16. The first filter is used to filter the RF signal transmitted by the second transmitting unit 142 to support the output of the target RF signal. Figure 8 In the embodiment, the first filter supports the transmission of the target RF signal in the B28 frequency band. Of course, the first filter can also support the transmission of the RF signal in the N28 frequency band. The first filter can be one or more, and the specific number depends on the number of frequency bands of the target RF signal that the second transmitting circuit 14 needs to support. For example, when the second transmitting circuit 14 needs to support the transmission of RF signals in the N8 and N28 frequency bands, two first filters can be set, one of which supports the transmission of RF signals in the N8 frequency band, and the other first filter supports the transmission of RF signals in the N28 frequency band.

[0077] In one embodiment, Fig. 9As shown, there may be multiple first filters, and different first filters have different bandpass filtering ranges. The second filtering unit also includes a first selection switch (for example, Fig. 9 The first end of the first selection switch is connected to the output end of the second transmitting unit 142, and the plurality of second ends of the first selection switch (such as Fig. 9 B8 TX1 and B28 TX1) shown in the figure are respectively connected to the first ends of the plurality of first filters.

[0078] By setting the first selection switch, filtering and transmission of target radio frequency signals of multiple frequency bands can be realized while sharing the second transmitting unit. Fig. 9 As shown, when there are two first filters, it can support filtering of RF signals in the two frequency bands of B8 and B28, and transmit the filtered target RF signals to the gating tuning circuit. Under this setting, filtering and transmission of RF signals in the two frequency bands of N8 and N28 can also be supported. Among them, the frequency bands supported by multiple first filters can be partially the same as the frequency bands supported by the first transmitting circuit. For example, the first transmitting circuit 12 and the second transmitting circuit 14 both support the transmission of target RF signals in the N8 and N28 frequency bands, and are compatible with N8 / N28 dual transmission.

[0079] In one embodiment, Figure 6 , Figure 8 and Fig. 9 As shown, the first filtering unit 124 includes: a second filter 1242 and a second selection switch 1244 .

[0080] The first end of the second filter 1242 is connected to the gate tuning circuit 16. The number of the second filter 1242 is at least one. When there are multiple second filters 1242, different second filters 1242 have different passband ranges. The passband of the second filter 1242 can be at least partially the same as the passband supported by the first filter. In this case, dual transmission of the target RF signal in the same frequency band can be supported.

[0081] Multiple first ends of the second selection switch 1244 can be respectively connected to the output end of the first transmitting unit 122, and multiple second ends of the second selection switch 1244 can be respectively connected to the second ends of multiple second filters 1242. The second selection switch 1244 is used to select and conduct the first transmitting unit 122 and one of the second filters 1242.

[0082] When there are multiple second filters 1242, the first transmitting circuit 12 can support the transmission of target RF signals in multiple frequency bands. Fig. 9As shown, the second selection switch 1244 (for example, it can be an SP8T switch as shown in the figure) accesses the RF signal from the first transmitting unit 12 (4G LB PA), and through gating, the RF signal output by the first transmitting unit 12 can be selected to be transmitted to one of the second ends, for example, it is selected to be output from contact 8 to the second filter 1242 supporting the B28 frequency band. After filtering by the second filter 1242, the target RF signal of the B28 frequency band is accessed through the contact 8 of the gating tuning circuit 16, and after gating and tuning thereof, it is output from the first antenna port LB ANT0 or the second antenna port LB ANT1. Based on the gating function of the second selection switch 1244, the transmission of RF signals of multiple different frequency bands can be realized.

[0083] It should be noted that the naming of the device ports in the embodiments and drawings of the present application is merely an identification and is not used to limit the functions of the ports, that is, it is not used to limit the scope of protection of the present application. For example, the first transmission port in the drawings is named 4G LB RFIN, but it does not mean that the first transmission port can only be used for transmission in the 4G LB frequency band, and can also be applied to the 5G LB frequency band, etc.

[0084] In one embodiment, if Figure 6 , Figure 8 , Fig. 9 , Fig.10 As shown, the RF device 10 is also configured with a first receiving port (eg, as Fig.10 RF OUT1 in ), a second receiving port (e.g., Fig.10 RF OUT2 in the RF device 10; the RF device 10 also includes: a first receiving circuit 19.

[0085] The first receiving circuit 19 is respectively connected to the selection tuning circuit 16, the first receiving port and the second receiving port. The first receiving circuit 19 is used to perform low-noise amplification processing on the RF signal received by the first antenna ANT0 or the second antenna ANT1, and output it to the processing circuit.

[0086] By integrating the first receiving circuit 19 on the RF device, it can not only support dual transmission of the target RF signal, but also support the main set reception of the RF signal. Moreover, both transmission and reception can share the antenna through the selection tuning circuit 16, thereby improving the degree of integration, enhancing the port matching capability, and reducing the cost.

[0087] A filter may be provided between the first receiving circuit 19 and the gate tuning circuit 16 to filter the received RF signal so as to receive the target RF signal. The frequency bands of the target RF signals supported by the first receiving circuit 19 and the first transmitting circuit 12 and the second transmitting circuit 14 may be at least partially the same or different, depending on the communication requirements.

[0088] The circuit connection between the first receiving circuit 19 and the gate tuning circuit can also be realized by the first transmitting circuit 12 and the second transmitting circuit 14. Fig. 9 As shown, the first filter and the second filter may adopt duplex filters, in which case the first receiving circuit 19 may be connected to the second filter in the first transmitting circuit. The first receiving circuit 19 may also be connected to the first filter in the second transmitting circuit 14. For example, the first receiving circuit 19 receives target RF signals in the B8 and B28 frequency bands from multiple first filters. The first receiving circuit 19 may also receive target RF signals in the B8, B12 / 17, B20, and B28 frequency bands from multiple second filters. Among them, the first receiving circuit 19 may support MIMO reception of target RF signals in at least one frequency band, for example, Fig. 9 In the MIMO reception of the target RF signal in the B28 frequency band, it supports.

[0089] In one embodiment, Fig. 9 As shown, the first receiving circuit 19 includes: a first amplifying unit 192 , a second amplifying unit 194 , and a first switching unit 196 .

[0090] Among them, multiple input ends of the first amplifying unit 192 are correspondingly connected to the first transmitting circuit 12, and are used to perform low-noise amplification processing on the RF signal received by the first antenna ANT0 or the second antenna ANT1. Multiple input ends of the second amplifying unit 194 are correspondingly connected to the second transmitting circuit 14, and are used to perform low-noise amplification processing on the RF signal received by the first antenna ANT0 or the second antenna ANT1. Multiple first ends of the first switching unit 196 are respectively correspondingly connected to the output end of the first amplifying unit 192 and the output end of the second amplifying unit 194, and multiple second ends of the first switching unit 196 are respectively correspondingly connected to the first receiving port and the second receiving port of the RF device 10. The first switching unit 196 is used to select and transmit the signal output by the first amplifying unit 192 or the signal output by the second amplifying unit 194 to the first receiving port or the second receiving port.

[0091] In one embodiment, the first amplifying unit 192 includes: a first low noise amplifier, and a third selection switch.

[0092] Among them, Fig. 9As shown, the output end of the first low noise amplifier LNA1 is connected to the first end of the first switch unit, and is used to perform low noise amplification processing on the received RF signal and output it to the first end of the first switch unit. The first end of the third selection switch SP4T#1 is connected to the input end of the first low noise amplifier LNA1, and the multiple second ends of the third selection switch SP4T#1 are correspondingly connected to the selection tuning circuit to select the output of the RF signal received by the first antenna port LBANT0 or the second antenna port LBANT1 to the first receiving port LNAOUT1 and the second receiving port LNAOUT2. It should be noted that this is intended to explain the connection relationship and signal transmission relationship between the first low noise amplifier and the third selection switch, but it does not limit the third selection switch to be an SP4T switch, and the selection of the switch is not limited.

[0093] In one embodiment, the second amplifying unit includes: a second low noise amplifier and a fourth selection switch.

[0094] Among them, Fig. 9 As shown, the output end of the second low noise amplifier LNA2 is connected to the first end of the first switch unit, and is used to perform low noise amplification processing on the received RF signal and output it to the first end of the first switch unit. The first end of the fourth selection switch SP4T#2 is connected to the input end of the second low noise amplifier LNA2, and the multiple second ends of the fourth selection switch SP4T#2 are correspondingly connected to the selection tuning circuit to select the output of the RF signal received by the first antenna port LBANT0 or the second antenna port LBANT1 to the first receiving port LNAOUT1 and the second receiving port LNAOUT2. It should be noted that this is intended to explain the connection relationship and signal transmission relationship between the second low noise amplifier and the fourth selection switch, but it does not limit the third selection switch to be an SP4T switch, and the selection of the switch is not limited.

[0095] In one embodiment, the frequency band of the target RF signal supported by the first transmitting circuit 12 is at least partially the same as the frequency band of the target RF signal supported by the second transmitting circuit, so as to support a dual-transmission function of RF signals in at least one frequency band.

[0096] In one embodiment, the target radio frequency signal includes a low frequency band radio frequency signal. For example, it can support the transmission of radio frequency signals in any one of the 4G low frequency band and the 5G low frequency band. Optionally, the radio frequency device provided in the embodiment of the present application can support ENDC (E-UTRA and New radio Dual Connectivity, dual connection of 4G wireless access network and 5G NR) function.

[0097] In one of the embodiments, the target radio frequency signal includes at least one of a radio frequency signal in the N8 frequency band and a radio frequency signal in the N28 frequency band.

[0098] In one embodiment, the RF device 10 is configured with at least one third transmitting port, and the RF device 10 includes at least one third transmitting circuit (eg, Fig. 9 The first end of the third transmitting circuit is connected to the third transmitting port, and the second end of the third transmitting circuit is connected to the gating tuning circuit 16, so as to share the gating tuning circuit and the first antenna ANT0 and the second antenna ANT1 with the first transmitting circuit 12 and the second transmitting circuit 14. Based on the adaptive tuning capability of the gating tuning circuit 16, when the third transmitting circuit transmits a radio frequency signal, the impedance matching adjustment of the third transmitting circuit can be realized, so as to reduce energy consumption and improve communication performance.

[0099] In one embodiment, there are multiple third transmitting circuits, and different third transmitting circuits support transmitting target radio frequency signals in different frequency bands. For example, multiple third transmitting circuits can support signal transmission in LB and HB frequency bands.

[0100] In one embodiment, the third transmitting circuit may support different network standards from the first transmitting circuit and the second transmitting circuit. For example, the first transmitting circuit and the second transmitting circuit support signal transmission of the 4G / 5G network standard, and the third transmitting circuit supports RF signal transmission of at least one of the 2G / 3G / GPS / Wi-Fi / Bluetooth standards.

[0101] In one embodiment, Figure 3 , Figure 5 , Figure 7 , Fig.11 As shown, an embodiment of the present application further provides a radio frequency system, which includes: a radio frequency device 10 of the terminal in the above embodiment, and a processing circuit 20.

[0102] Among them, the relevant structure, nouns and functional explanations of the radio frequency device 10 can refer to the description in the above embodiment, and will not be repeated here.

[0103] like Fig.10 As shown, the processing circuit 20 is respectively connected to the first transmitting port RF IN1, the second transmitting port RF IN2, and the tuning control port CTR. The processing circuit 20 is configured to generate and output a tuning signal to the tuning control port CTR according to the received power test signal, and the tuning signal acts on the gate tuning circuit 16 through the tuning control port CTR, and adjusts the antenna impedance position of the transmitting signal based on the adaptive tuning capability of the gate tuning circuit 16. The power test signal is used to reflect the power of the RF signal output by the first transmitting circuit 12 or the second transmitting circuit 14.

[0104] Among them, the processing circuit 20 may include an RF transceiver, and the RF transceiver is configured with a transmitting port and a feedback port D2. The RF transceiver outputs an RF signal to the first transmitting circuit 12 and the second transmitting circuit 14 through the transmitting port. The RF transceiver can also be configured with a control port D1, which is connected to the tuning control port CTR of the RF device through the control port D1 to send a tuning signal to the gate tuning circuit 16. For example, the RF transceiver can be configured with one of a mipi (Mobile Industry Processor Interface) port and a GPIO (General Purpose Input Output) port, and the control circuit can be connected to the tuning control port through the mipi port or the GPIO port to send a tuning signal to the gate tuning circuit 16, adjust the tuning parameters of the gate tuning circuit 16, improve communication performance, and reduce energy consumption. The feedback port D2 of the RF transceiver is used to receive the signal output by the power feedback port of the RF device 10, so as to generate a tuning signal according to the power detection signal output by the power detection circuit 18.

[0105] The RF system equipped with the RF device 10 can generate and output a tuning signal to the tuning control port CTR according to the transmission power of the first transmitting circuit 12 and the second transmitting circuit 14 based on the processing capability of the processing circuit 20, adjust the tuning parameters of the gated tuning circuit 16, and adjust the impedance position of the antenna transmitting the signal. The antenna transmitting the signal can be at least one of the first antenna ANT0 and the second antenna ANT1, and it can be understood that the antenna in the state of transmitting the signal is the target antenna.

[0106] In one embodiment, the power test signal includes a forward coupling signal and a reverse coupling signal, and the radio frequency system further includes: a power detection circuit 18. The power detection circuit 18 is used to couple the radio frequency signal transmitted through the first antenna port or the second antenna port, and output the forward coupling signal and the reverse coupling signal to the processing circuit. For the power detection circuit 18, please refer to the description in the above embodiment, which will not be repeated here. Based on the power detection capability of the power detection circuit 18, the forward coupling signal and the reverse coupling signal can be output to the processing circuit 20, so that the processing circuit 20 can understand the power conditions of the first transmitting circuit 12 and the second transmitting circuit 14, and generate a tuning signal to the tuning control port CTR to adjust the tuning parameters of the selection tuning circuit 16.

[0107] In one embodiment, if Fig.12 As shown, the processing circuit 20 is configured to perform the following steps:

[0108] S1202, determining a reflection characteristic parameter of a transmission path according to the forward coupling signal and the reverse coupling signal;

[0109] S1204, determining a real-time impedance position according to the reflection characteristic parameter and the initial impedance position of the load on the Smith chart; wherein the initial impedance position is related to the frequency band of the target radio frequency signal;

[0110] S1206, adjusting the tuning parameters of the gate tuning circuit according to the real-time impedance position and the target impedance position, so that the distance between the real-time impedance position and the target impedance position after adjustment is smaller than the distance between the real-time impedance position and the target impedance position before adjustment. Then, the operation state of the RF system is optimized, so that the RF system can perform adaptive adjustment in various operation scenarios, optimize its own operation state, and thus ensure the overall performance of the communication device.

[0111] in, Fig.13 For a schematic diagram of a Smith chart according to an embodiment of the present application, please refer to Fig.13 The initial impedance position of the load on the Smith chart is the impedance position of the communication device set in free space. Taking a mobile phone as an example, the initial impedance position can be the impedance position of the entire device when it is not held in the hand or in other special scenarios. The initial impedance position is related to the frequency band of the RF signal. The initial impedance position corresponding to different frequency bands of the RF signal may be different. The reflection characteristic parameters of the transmission path are determined based on the forward coupling signal and the reverse coupling signal. The reflection characteristic parameters can reflect the working performance of the transmission path. The reflection characteristic parameters and the initial impedance position are substituted into the pre-stored impedance relationship to determine the real-time impedance position. Among them, taking the reflection characteristic parameter as the voltage standing wave ratio as an example, the calculation formula of the impedance relationship can be:

[0112]

[0113]

[0114] Where VSWR is the standing wave ratio, ρ is the reflection coefficient, and Z L is the real-time impedance, and Z0 is the initial impedance.

[0115] After determining the real-time impedance position, since adjusting the tuning parameters of the gating tuning circuit 16 can change the impedance of the transmission path (including the transmission path corresponding to the first transmission circuit 12, the transmission path corresponding to the second transmission circuit 14, and the transmission path corresponding to the third transmission circuit in the above embodiment), therefore, adjusting the tuning parameters of the gating tuning circuit 16 according to the real-time impedance position and the target impedance position can make the distance between the adjusted real-time impedance position and the target impedance position smaller than the distance between the real-time impedance position and the target impedance position before the adjustment. It should be noted that the target impedance position can be a preset default impedance position, and the default target impedance position can be an impedance position with the lowest power consumption of the RF system.

[0116] In one embodiment, the processing circuit 20 can be further configured to adjust the tuning parameters of the gate tuning circuit 16 according to the real-time impedance position and the target impedance position so that the distance between the adjusted real-time impedance position and the target impedance position is minimized. Thus, the real-time impedance position is closest to the target impedance position, and the RF system is closest to the target state. Taking the target impedance position as an example, the impedance position with the lowest power consumption of the RF system is minimized, so that the power consumption of the RF system is maximized within the adjustable range. Among them, the minimum distance between the real-time impedance position and the target impedance position can be 0, even if the adjusted real-time impedance position is at the distance of the target impedance position.

[0117] As described in the above embodiments, the inventors have discovered through creative work that in related technologies, when the mobile phone antenna is touched by the human body or other metal objects during horizontal screen gaming, hand-held, USB charging, etc., the passive position of the antenna is affected, and at this time the power consumption and performance of the entire device are severely affected.

[0118] like Fig.13 As shown, all active power amplifiers PA have a passive Loadpull diagram, which corresponds to the relationship curve between position and current on the Smith diagram. The position of its passive load on the Smith diagram determines its current size. When the position is closer to the lower left (third quadrant), its current is larger, and when it is closer to the upper left (first quadrant), its current is smaller. This is its inherent characteristic.

[0119] Ideally, its passive position is at the center of the Smith diagram, and VSWR = 1:1 at this time. However, due to differences in load and impedance, it is difficult to achieve the ideal state. Therefore, a set of simulations are performed below to verify the changes in power consumption under different VSWRs and phases.

[0120] Fig.14 To test the model circuit diagram, including the PA (the power amplifier included in the transmitting unit in the above embodiment) and the load, the simulation conditions are set to the following two:

[0121] 1- Keep Z0 = 50Ω, the VSWR (standing wave ratio) at this time is 1:1, and the power consumption is simulated at an output power of 29dbm; 2- Keep VSWR = 3:1, the output power is 29dbm, the phase is 0~360°, and the power consumption is simulated.

[0122] Fig.15 is a simulation waveform diagram obtained based on the test model. Fig.15As shown in the figure, it can be found that when VSWR = 1:1, the current remains unchanged when the phase changes from 0 to 360 degrees, and the current value is 553mA; when VSWR = 3:1, the current fluctuation value is up to 134mA when the phase changes from 0 to 360 degrees, and when VSWR = 6:1, the current fluctuation value is up to 134mA when the phase changes from 0 to 360 degrees. Fig.14 It can be seen that the current fluctuation value is larger, which shows that the larger the VSWR, the larger the current fluctuation value at different phases; Fig.14 The vertical axis represents the current, and the horizontal axis represents different phases. It can be found that the larger the VSWR, the greater the current fluctuation value at different phases.

[0123] It can be seen from this that in the relevant technical solutions, the VSWR of the whole machine will change in scenarios such as hand-held, horizontal screen, and USB plugged in, and the phase will also change, resulting in a significant impact on the current of the whole machine, and a very bad experience on the temperature rise and battery life of the whole machine.

[0124] Therefore, VSWR can reflect the impedance of the load, and the processing circuit determines the real-time impedance position according to the VSWR and the initial impedance position, and then adjusts the tuning parameters of the selection tuning circuit according to the real-time impedance position and the target impedance position, so that the distance between the real-time impedance position and the target impedance position after adjustment can be made smaller than the distance between the real-time impedance position and the target impedance position before adjustment, which is beneficial to optimize the operating state of the communication equipment.

[0125] The above-mentioned radio frequency system, by setting the power detection circuit 18 on the transmission path between the gate tuning circuit 16 and the antenna, enables the power detection circuit 18 to couple the transmitted radio frequency signal and output the forward coupling signal and the reverse coupling signal to the processing circuit, and the processing circuit 20 can determine the reflection characteristic parameters of the transmission path according to the forward coupling signal and the reverse coupling signal, and then determine the real-time impedance position according to the reflection characteristic parameters and the initial impedance position of the load on the Smith chart, and control the tuning parameters of the gate tuning circuit 16 according to the real-time impedance position and the target impedance position, so that the distance between the real-time impedance position and the target impedance position after adjustment is smaller than the distance between the real-time impedance position and the target impedance position before adjustment, thereby optimizing the operating state of the radio frequency system, so that the radio frequency system can be adaptively adjusted in various operating scenarios to optimize its own operating state, thereby ensuring the overall performance of the communication equipment.

[0126] In one embodiment, if Fig.16 As shown, the radio frequency system further includes: a temperature detection module 30 .

[0127] The temperature detection module 30 is connected to the processing circuit 20 and is used to collect temperature information of the RF system. The temperature detection module 30 may include a temperature sensor, which collects temperature information of the RF system and feeds it back to the processing circuit 20. The processing circuit 20 is also configured to update the target impedance position according to the temperature information.

[0128] In the application, the radio frequency system can be set on the main board, and the temperature sensor can collect the temperature information of the main board and use the temperature information of the main board as the temperature information of the radio frequency system.

[0129] It can be understood that the temperature information of the RF system is related to the operating state of the communication equipment. When the temperature of the RF system is too high, the operating state of the communication equipment will be negatively affected and may even cause damage to some electronic components. Therefore, the target impedance position is updated according to the temperature information, so that the processing circuit 20 adjusts the tuning parameters of the selection tuning circuit according to the real-time impedance position and the target impedance position, thereby adjusting the operating state of the communication equipment to adapt to the temperature of the communication equipment, and balancing the safety and communication performance of the communication equipment.

[0130] In one embodiment, the processing circuit 20 is further configured to: obtain the target temperature interval in which the temperature information is located; and update the target impedance position according to the control strategy corresponding to the target temperature interval. The target temperature interval is one of the preset temperature intervals, and the control strategies corresponding to the temperature intervals are different. The performance parameters characterized by the target impedance positions obtained based on the updates of the control strategies are different.

[0131] It should be noted that the performance parameters represented by the target impedance position may include power consumption, antenna efficiency, error vector amplitude position and one of RF power amplifier efficiency. The optimal impedance position corresponding to the power consumption, antenna efficiency, error vector amplitude position and RF power amplifier efficiency may be preset as the target impedance position corresponding to each temperature range.

[0132] In this embodiment, the processing circuit 20 compares the temperature information with each temperature interval to determine the target temperature interval in which the temperature signal is located, and then updates the target impedance position according to the control strategy corresponding to the target temperature interval to determine the target impedance position that is consistent with the temperature information, and then controls the tuning parameters of the selection tuning circuit 16 according to the real-time impedance position and the target impedance position, thereby adjusting the operating state of the communication device to adapt to the temperature of the communication device and balancing the safety and communication performance of the communication device.

[0133] In one embodiment, the processing circuit 20 is further configured to: when the temperature information is greater than a preset first temperature threshold, update the target impedance position to one of a target power consumption position and a target equilibrium position. The target power consumption position is an impedance position with the lowest power consumption of the RF system, the target equilibrium position is a midpoint position between the target power consumption position and the target efficiency position, and the target efficiency position is an impedance position with the highest antenna efficiency.

[0134] Among them, when the temperature information is greater than the preset first temperature threshold, the temperature of the communication device is also high. Continuing to maintain the current operating state may cause further temperature rise, and then cause damage to the electronic components in the communication device. Therefore, it is necessary to adjust the operating state of the RF system to reduce the temperature of the RF system.

[0135] It can be understood that the temperature of the RF system is related to the heat generated by the operation of the RF system, and in theory, the power consumption of the RF system is positively correlated with the heat generated by the operation of the RF system, that is, the higher the power consumption of the RF system, the more heat the RF operation generates. Therefore, if the processing circuit is configured to update the target impedance position to the target power consumption position when the temperature information is greater than the preset first temperature threshold, then the tuning parameters of the gating tuning circuit 16 are adjusted according to the real-time impedance position and the target impedance position, which can reduce the power consumption of the RF system, thereby helping to reduce the temperature of the RF system. If the processing circuit 20 is configured to update the target impedance position to the target equilibrium position when the temperature information is greater than the preset first temperature threshold, then the tuning parameters of the gating tuning circuit 16 are adjusted according to the real-time impedance position and the target impedance position, which can reduce the power consumption of the RF system while ensuring the efficiency of the transmitting antenna, thereby balancing the security and communication performance of the communication device.

[0136] In one test example, the RF system of this application was used to test the current comparison of three frequency bands LTE B1\B3\B41 on four antennas in free space (no hand holding) and horizontal screen holding. Through comparison, it was found that the current in the horizontal screen holding case and the current in the no hand holding case are mostly better or the increment is very low, and the data improvement is very large. Taking the ANT3 antenna as an example, the power consumption is basically the same under different power levels such as maximum power and minimum power. And updating the target impedance position to the balanced position will also greatly improve the current data.

[0137] In the application, optionally, the processing circuit 20 can be further configured to: when the temperature information is greater than a preset first temperature threshold and less than a preset second temperature threshold, update the target impedance position to a target equilibrium position; when the temperature information is greater than a preset second temperature threshold, update the target impedance position to a target power consumption position. The second temperature threshold is greater than the first temperature threshold. By configuring the processing circuit as described above, the RF system can be cooled down as quickly as possible when the temperature is too high; and when the temperature is relatively low, the cooling rate of the RF system and the efficiency of the transmitting antenna are balanced, so that the RF system can have better communication performance even in a state of low power consumption.

[0138] In one embodiment, the processing circuit 20 is further configured to: when the temperature information is less than a preset first temperature threshold, update the target impedance position to one of a target error vector magnitude position and a target RF power amplifier efficiency position. The target error vector magnitude position is an impedance position where the target error vector magnitude of the RF system is the lowest, and the target RF power amplifier efficiency position is an impedance position where the RF power amplifier efficiency of the RF system is the highest.

[0139] Among them, the error vector amplitude refers to the difference between the theoretical waveform and the actual waveform received, which is the RMS value of the ratio of the average error vector signal power to the average reference signal power. The size of the error vector amplitude can effectively reflect the performance of the RF system. The RF power amplifier efficiency is the efficiency of the RF power amplifier included in the RF system, which is obviously also directly related to the performance of the RF system.

[0140] It can be understood that when the temperature information is less than the preset first temperature threshold, the temperature of the RF system is low at this time, and more attention can be paid to the working performance of the RF system. Therefore, the target impedance position can be updated to one of the target error vector amplitude position and the target RF power amplifier efficiency position, so that the processing circuit adjusts the tuning parameters of the selection tuning circuit according to the real-time impedance position and the target impedance position, and the working performance of the RF system can be optimized.

[0141] In one embodiment, if Fig.17 As shown, the RF system further includes an RF receiving device 40. The RF receiving device 40 is configured with a first receiving port for connecting to the processing circuit 20, a second receiving port, a third antenna port for connecting to a third antenna, and a fourth antenna port for connecting to a fourth antenna; the RF receiving device 40 includes a second receiving circuit.

[0142] Among them, multiple input ends of the second receiving circuit are respectively connected to the third antenna port and the fourth antenna port, and multiple output ends of the second receiving circuit are respectively connected to the first receiving port and the second receiving port of the RF receiving device 40. By integrating the second receiving circuit on the device, the external devices such as filters required for reception can be reduced, the insertion loss can be reduced, the port matching performance can be improved, and the communication performance can be improved.

[0143] The second receiving circuit can support diversity reception of the target RF signal. The RF system equipped with the RF device 10 and the RF receiving device 40 can support main set reception and diversity reception of the target RF signal, thereby improving communication performance.

[0144] In one embodiment, if Fig.18 As shown, the second receiving circuit includes: a third filtering unit 42 , a fourth filtering unit 44 and a receiving unit 46 .

[0145] The first end of the third filtering unit 42 is connected to the third antenna port, and the third filtering unit 42 is used to filter the radio frequency signal received by the third antenna and output a target radio frequency signal.

[0146] A first end of the fourth filtering unit 44 is connected to the fourth antenna port, and the fourth filtering unit 44 is used to filter the radio frequency signal received by the fourth antenna and output a target radio frequency signal.

[0147] Multiple first ends of the receiving unit 46 are respectively connected to the second end of the third filtering unit 42 and the second end of the fourth filtering unit 44 , and multiple second ends of the receiving unit 46 are respectively connected to the first receiving port and the second receiving port of the RF receiving device 40 .

[0148] In one embodiment, the frequency band of the target RF signal supported by the third filtering unit 42 is at least partially the same as the frequency band of the target RF signal supported by the fourth filtering unit 44 to support diversity MIMO reception of the target RF signal of at least one frequency band.

[0149] In one embodiment, the fourth filtering unit 44 includes a bandpass filter. The first end of the bandpass filter is connected to the first ends of the receiving unit 46, and the second end of the bandpass filter is connected to the first end of the receiving unit 46. The bandpass filter can be one or more, for example, Fig.19 As shown, a bandpass filter supports the transmission of radio frequency signals in the B28 frequency band. The bandpass filter may be a SAW (surface acoustic wave) filter.

[0150] In one embodiment, Figure 20-21As shown, there may be multiple band-pass filters, and different band-pass filters have different band-pass filtering ranges.

[0151] In one embodiment, Fig.21 As shown, in the case where there are multiple bandpass filters, the fourth filtering unit 44 further includes: a second switching circuit.

[0152] Among them, the first end of the second switch circuit is connected to the fourth antenna port, and the multiple second ends of the second switch circuit are respectively connected to the second ends of the multiple bandpass filters. The second switch circuit is used to select and transmit the RF signal connected to the fourth antenna port to one of the bandpass filters to support the reception of target RF signals in different frequency bands. Based on the setting of the second switch circuit, multiple bandpass filters can share the fourth antenna, improve the antenna utilization rate, and facilitate the miniaturization design of communication equipment. Among them, the second switch circuit can use a single-pole double-throw switch. The specific selection of the second switch circuit can be determined according to the number of fourth antennas and the number of bandpass filters connected to it.

[0153] In one embodiment, the third filtering unit 42 includes at least one bandpass filter, which is connected in series between the third antenna port and the receiving unit 46. When there are multiple bandpass filters, target RF signals of multiple different frequency bands can be supported. Fig.21 As shown, the third filtering unit 42 may include a bandpass filter supporting at least one frequency band of B6, B8, B12 / 13, B20, and B28.

[0154] When the third filter includes multiple bandpass filters, the third filtering unit 42 may also include a third switching circuit, the first end of the third switching circuit is connected to the third antenna port, and the multiple second ends of the third switching circuit are correspondingly connected to the multiple bandpass filters in the third filtering unit 42, so as to transmit the received RF signal to the receiving unit 46 through the bandpass filter.

[0155] In one embodiment, if Fig.19 As shown, the receiving unit 46 includes: a third amplifying unit (for example, Fig.19 SP4T#4 and LNA6 as shown), a fourth amplification unit (e.g., Fig.19 AP4T#5 and LNA7 shown), and a second switch unit (DPDT).

[0156] Among them, multiple input ends of the third amplifying unit are correspondingly connected to the third filtering unit 42, which is used to perform low-noise amplification processing on the RF signal received by the third antenna. Multiple input ends of the fourth amplifying unit are correspondingly connected to the fourth filtering unit 44, which is used to perform low-noise amplification processing on the RF signal received by the fourth antenna. Multiple first ends of the second switch unit are respectively correspondingly connected to the output end of the third amplifying unit and the output end of the fourth amplifying unit, and multiple second ends of the second switch unit are respectively correspondingly connected to the first receiving port and the second receiving port of the RF receiving device 40. The first switch unit is used to select and transmit the signal output by the third amplifying unit or the signal output by the fourth amplifying unit to the first receiving port or the second receiving port.

[0157] In one embodiment, if Fig.19 As shown, the third amplifying unit includes: a third low noise amplifier (LNA6), and a fifth selection switch (SP4T#4).

[0158] Among them, Fig. 9 As shown, the output end of the third low noise amplifier LNA6 is connected to the first end of the second switch unit, and is used to perform low noise amplification processing on the received RF signal and output it to the first end of the second switch unit. The first end of the fifth selection switch SP4T#4 is connected to the input end of the third low noise amplifier LNA6, and the multiple second ends of the fifth selection switch SP4T#4 are correspondingly connected to the third filter unit 42 to select the target RF signal received by the third antenna port LB ANT to be output to the RF transceiver via the first receiving port LB OUT0 or the second receiving port LB OUT1 of the RF receiving device 40. It should be noted that the purpose here is to explain the connection relationship and signal transmission relationship between the third low noise amplifier and the fifth selection switch, but it does not limit the fifth selection switch to be an SP4T switch, and the selection of the switch is not limited.

[0159] In one embodiment, the fourth amplifying unit includes: a fourth low noise amplifier and a sixth selection switch.

[0160] Among them, Fig.19As shown, the output end of the fourth low noise amplifier LNA7 is connected to the first end of the second switch unit, for performing low noise amplification processing on the received RF signal and outputting it to the first end of the second switch unit. The first end of the sixth selection switch SP4T#5 is connected to the input end of the fourth low noise amplifier LNA7, and the second ends of the sixth selection switch SP4T#5 are correspondingly connected to the fourth filter unit 44, so as to transmit the RF signal received by the fourth antenna port (AUX LB1) to the fourth low noise amplifier LNA7, and after low noise amplification processing, it is transmitted to the first receiving port LB OUT0 or the second receiving port LB OUT1 of the RF receiving device 40 through the second switch unit DPDT for output. It should be noted that the purpose here is to explain the connection relationship and signal transmission relationship between the fourth low noise amplifier and the sixth selection switch, but it does not limit the sixth selection switch to be a SP4T switch, and the selection of the switch is not limited.

[0161] Each filter in the embodiment of the present application may be a bandpass filter, a low-pass filter, etc. It should be noted that in the embodiment of the present application, the type of each filter is not further limited, and a suitable filter can be selected according to the frequency band of the low-frequency signal to be filtered.

[0162] In order to better illustrate the functional implementation of the radio frequency system provided in the embodiment of the present application, Fig. 22 The system architecture shown is used for explanation, but it should be understood that the examples given here do not limit the actual protection scope of the present application.

[0163] like Fig. 22 As shown in , taking the target RF signal including the N28 frequency band signal as an example, the working process is introduced as follows.

[0164] TX0 link: The transmission signal (target RF signal) is output from the TX0 LB0 port of the RF transceiver, and passes through the RF line to the first transmission port (5GLB0 RFIN port) of the RF device. After the signal is amplified by the first transmitting unit (5GLB PA), it reaches the contact 9 of the second selection switch (SP8T switch), and the RF transceiver switches to contact 8. After passing through the second filter (B28 duplexer), it reaches the contact 8 of the selection tuning circuit (DP10T switch). After the contact 8 and contact 11 of the selection tuning circuit are connected, it passes through the coupler to the first antenna port (LB ANT0 port) for output. Then, after routing, it is output to the first antenna ANT0 for transmission.

[0165] TX1 link: The transmit signal is output from the TX1 LB1 port of the RF transceiver, through the RF line, to the second transmit port (5GLB1 RFIN port) of the RF device, and then amplified by the second transmit unit (5GLB1 PA), through the B28 TX1 link to the B28 TX1 contact of the second filter unit (B28 duplexer). The output signal of the second filter unit is transmitted via routing to the second antenna port (LB ANT1 port) for output. The signal of the second antenna port is output to the second antenna ANT1 for transmission after routing.

[0166] PRX link: The received signal enters from the first antenna ANT0 and reaches the first antenna port (LB ANT0 port) of the RF device. It passes through the internal coupler to the selection tuning circuit (DP10T switch), and the selection tuning circuit switches to contact 8. It passes through the second filter (B28 duplexer) to the contact 3 (B28 RX pin) of the third selection switch (ST4T#1 switch). After the third selection switch connects contact 3 and contact 5, it is amplified by the first low noise amplifier (LNA1) and reaches the first switch unit (DPDT switch). When the first switch unit switches to the state where contact 3 and contact 1 are connected, the received signal is transmitted to the first receiving port (LNAOUT1 port) of the RF device for output, and the received signal enters the RF transceiver through the SDR PRX port of the RF transceiver.

[0167] DRX link: The received signal is connected from the third antenna ANT2, and is routed to the third antenna port (LB ANT port) of the RF receiving device through the B28 DRX line. In the third filter unit, it passes through the contact 9 of the third switch circuit (SP8T switch) and is connected to its contact 5, so as to be transmitted to the bandpass filter (B28 band filter connected to the B28 RX pin) connected to contact 5. After passing through the B28 band bandpass filter in the third filter unit, it is transmitted to contact 2 of the fifth selection switch (SP4T#4 switch). After contact 2 is connected to contact 5, the signal is amplified by the third low noise amplifier (LNA6) and then to contact 3 of the second switch unit (DPDT switch). The second switch unit switches to the state where contact 3 and contact 1 are connected. The signal is output through the second switch unit to the first receiving port (LB_OUT0 port) of the RF receiving device. The received signal enters the RF transceiver through the SDRDRX port of the RF transceiver.

[0168] PRX MIMO link: The receiving signal enters from the second antenna ANT1, reaches the second antenna port (LBANT1 port) of the RF device, passes through the internal coupler to the second filter unit, passes through the B28 duplexer of the second filter unit, and is transmitted to contact 4 of the fourth selection switch (SP4T#2) through the B28 RX1 pin. After contact 4 is connected to contact 5, it is amplified by the second low noise amplifier (LNA2) and reaches contact 4 of the first switch unit (DPDT switch). The first switch unit switches to connect contact 4 and contact 2, and the signal is output through the second receiving port (LNA OUT2 port) of the RF device. The receiving signal enters the RF transceiver through the SDRPRX MIMO port of the RF transceiver.

[0169] DRXMIMO link: The received signal enters from the fourth antenna ANT3, passes through the N28 DRX MIMO path, and reaches the fourth antenna port (AUX_LB1 port) of the RF receiving device. It passes through the fourth filter unit (B28 SAW) inside the device, and reaches the contact 4 of the sixth selection switch (SP4T#5 switch) and then connects to contact 5. It is transmitted to the fourth low noise amplifier (LNA7) through contact 5. After being amplified by the fourth low noise amplifier, it reaches contact 4 of the second switch unit (DPDT switch). The second switch unit switches to contact 2, and the signal reaches the second receiving port (LB OUT1 port) of the RF receiving device. The received signal enters the RF transceiver through the SDR DRX MIMO port.

[0170] The radio frequency system provided in this embodiment realizes FDD UL-MIMO (Frequency Division Duplex uplink multiple input multiple output to support multiple signal transmission), and compared with the traditional radio frequency front-end solution, it can save 1 transmitting unit, 2 duplexers, 2 filters and PCB traces, 1 coupler in terms of area, and can save 40mm 2 The layout space can be reduced. The BOM cost can be saved by 4 to 5 yuan compared with the traditional technical solution. In addition, the RF system provided in this embodiment supports 4-way reception of N28, and the sensitivity will be improved by 0.3 to 0.6 dBm accordingly.

[0171] like Fig.23 As shown, in another embodiment, taking the target RF signal transmission in the N8 frequency band as an example, the working principle of the RF system and the flow of each link are as follows (the working principle and the flow of each link in the N28 are similar and will not be repeated).

[0172] TX0 link: The transmit signal is output from the TX0 LB0 port of the RF transceiver; through the RF line, it reaches the first transmit port (5G LB0 RFIN port) of the RF device; after the signal is amplified by the first transmitting unit (5G LB PA), it reaches contact 9 of the second selection switch (SP8T switch); the second selection switch is switched to contact 5, and after passing through the second filter (B8 duplexer) connected to the B8 TX pin, it reaches contact 5 of the selection tuning circuit (DP11T); after contact 5 and contact 12 of the selection tuning circuit are connected, it is output through the coupler to the first antenna port (LB ANT0 port) of the RF device; after routing, it is output to the first antenna ANT0 for transmission.

[0173] TX1 link: The transmit signal is output from the TX1 LB1 port of the RF transceiver; through the RF line, it reaches the second transmit port (5G LB1 RFIN port) of the RF device; after the signal is amplified by the second transmit unit (5G LB1 PA), it reaches contact 3 of the first selection switch (SP2T#1 switch), the first selection switch is connected to contact 1 of the switch, and reaches contact 10 of the selection tuning circuit (DP11T) through the first filter (B8 duplexer) connected to the B8 TX1 pin; after the selection tuning circuit (DP11T) is connected to contact 13, it reaches the second antenna port (LB ANT1 port) of the RF device through the coupler; after routing, it is output to the second antenna ANT1 for transmission.

[0174] PRX link: The received signal enters from the first antenna ANT0 and reaches the first antenna port (LB ANT0 port) of the RF device; passes through the internal coupler to contact 12 of the selection tuning circuit (DP11T), the selection tuning circuit (DP11T) switches to contact 5, passes through the first filter (B8 duplexer) to contact 2 of the third selection switch (ST4T#1 switch); after the third selection switch (ST4T#1 switch) is connected to contact 5, it is amplified by the first low noise amplifier (LNA1) and reaches the first switch unit (DPDT switch); the first switch unit switches to contact 3 and contact 1 to be connected, and output to the first receiving port (LNA OUT1 port) of the RF device; the received signal enters the RF transceiver through the SDR PRX port.

[0175] DRX link: The received signal enters from the third antenna ANT2, passes through the N28 DRX routing to the third antenna port (LB ANT port) of the RF receiving device; passes through contact 9 of the internal third switch circuit (SP8T switch) and is connected to the bandpass filter (B8 band band bandpass filter) connected to contact 1; then goes to contact 3 of the internal fifth selection switch (SP4T#4 switch), after contact 3 is connected to contact 5, the received signal is amplified by the third low noise amplifier (LNA6) and then goes to the second switch unit (DPDT switch); the second switch unit switches to contact 1, to the first receiving port (LB_OUT0 port output) of the RF receiving device; the received signal enters the RF transceiver through the SDR DRX port.

[0176] PRX MIMO link: The receiving signal enters from the second antenna ANT1 and reaches the second antenna port (LBANT1 port) of the RF device; passes through the internal coupler to contact 13 of the selection tuning circuit (DP11T switch), and after contact 13 is connected to contact 10, it passes through the B8 duplexer of the second filter unit and reaches contact 3 (LNAAUX2 pin) of the fourth selection switch (SP4T#2 switch); after the fourth selection switch (SP4T#2 switch) is connected to contact 5, it is amplified by the second low noise amplifier (LNA2) and reaches contact 4 of the first switch unit (DPDT switch); the first switch unit switches to contact 2, and the receiving signal is transmitted to the second receiving port (LNAOUT2 port) of the RF device for output; the receiving signal enters the RF transceiver through the SDR PRX MIMO port.

[0177] DRX MIMO link: The receiving signal enters from the fourth antenna ANT3, passes through the N28 DRX MIMO path, and reaches the fourth antenna port (AUX_LB1 port) of the RF receiving device; after passing through contact 3 of the internal second switch circuit (SP2T#3 switch), contact 3 is connected to contact 2, and the receiving signal passes through the B8 band band pass filter (B8 SAW) and reaches the contact 3 position of the sixth selection switch (SP4T#5 switch); after contact 3 is connected to contact 5, the receiving signal is amplified by the fourth low noise amplifier (LNA7) and reaches contact 4 of the second switch unit (DPDT switch); the second switch unit (DPDT switch) switches to contact 2, and the receiving signal is transmitted to the second receiving port (LB OUT1 port) of the RF receiving device; the receiving signal enters the RF transceiver through the SDR DRX MIMO port.

[0178] like Fig.24 As shown, an embodiment of the present application further provides a communication device 100, on which the radio frequency system in any of the above embodiments is disposed.

[0179] By setting up the RF system on the communication device 100, the throughput of the RF system for the target RF signal is improved, and the device has a high degree of integration, which reduces the area of ​​the substrate occupied by each device in the RF system. At the same time, it can also simplify the power supply, logic control and PCB layout and wiring of each device, saving costs. In addition, during use, through adaptive tuning, the device can maintain low power consumption in various scenarios and improve battery life.

[0180] In one embodiment, the communication device 100 provided in the embodiment of the present application includes a processing circuit. Based on the coordination and control capability of the processing circuit, the communication device 100 can support CA (Carrier Aggregation, carrier aggregation, multi-band simultaneous operation), EN-DC (LTE NR Double Connect, dual connection of 4G wireless access network and 5G-NR), and NR (New radio, new access network).

[0181] like Fig.25 As shown, further, the communication device 100 is taken as a mobile phone 11 as an example for explanation, specifically, as Fig.25 As shown, the mobile phone 11 may include a memory 21 (which may optionally include one or more computer-readable storage media), a processing circuit 20, a peripheral device interface 23, a radio frequency system 24, and an input / output (I / O) subsystem 26. These components may communicate via one or more communication buses or signal lines 29. Those skilled in the art will appreciate that Fig.25 The illustrated mobile phone 11 does not constitute a limitation of the mobile phone, and may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently. Fig.25 The various components shown in the EMBODIMENTS 2000 are implemented in hardware, software, or a combination of hardware and software, including one or more signal processing and / or application specific integrated circuits.

[0182] The memory 21 optionally includes a high-speed random access memory, and optionally also includes a non-volatile memory, such as one or more disk storage devices, flash memory devices, or other non-volatile solid-state memory devices. Exemplarily, the software components stored in the memory 21 include an operating system 211, a communication module (or an instruction set) 212, a global positioning system (GPS) module (or an instruction set) 213, etc.

[0183] The processing circuit 20 and other control circuits (such as the control circuit in the radio frequency system 24) can be used to control the operation of the mobile phone 11. The processing circuit 20 may include one or more microprocessors, microcontrollers, digital signal processors, baseband processors, power management units, audio codec chips, application-specific integrated circuits, etc.

[0184] The processing circuit 20 may be configured to implement a control algorithm for controlling the use of an antenna in the mobile phone 11. The processing circuit 20 may also issue control commands for controlling switches and matching units in the radio frequency system 24, etc.

[0185] The I / O subsystem 26 couples input / output peripherals on the mobile phone 11, such as a keypad and other input control devices, to the peripheral device interface 23. The I / O subsystem 26 optionally includes a touch screen, buttons, tone generators, accelerometers (motion sensors), ambient light sensors and other sensors, light emitting diodes and other status indicators, data ports, etc. Exemplarily, a user can control the operation of the mobile phone 11 by supplying commands via the I / O subsystem 26, and can use the output resources of the I / O subsystem 26 to receive status information and other output from the mobile phone 11. For example, a user can press button 261 to turn the mobile phone on or off.

[0186] The radio frequency system 24 may include the radio frequency device in any of the aforementioned embodiments.

[0187] In the description of this specification, the description with reference to the terms "one of the embodiments", "some embodiments", "exemplary", etc. means that the specific features, structures or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic description of the above terms does not necessarily refer to the same embodiment or example.

[0188] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0189] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A radio frequency device, characterized in that: The radio frequency device is configured with a first transmitting port, a second transmitting port and a tuning control port, a first antenna port for connecting to a first antenna, and a second antenna port for connecting to a second antenna, and the radio frequency device includes: a first transmitting circuit, wherein an input end of the first transmitting circuit is connected to the first transmitting port, and is used to support amplification processing of a target radio frequency signal from the first transmitting port; a second transmitting circuit, wherein an input end of the second transmitting circuit is connected to the second transmitting port, and is used to support amplification processing of the target radio frequency signal from the second transmitting port; A gating tuning circuit is respectively connected to the output end of the first transmitting circuit, the output end of the second transmitting circuit, the tuning control port, the first antenna port and the second antenna port. The gating tuning circuit is used to select the radio frequency signal output by the first transmitting circuit or the second transmitting circuit to be transmitted via the target antenna connected to the target antenna port, and to change the tuning parameters of the gating tuning circuit according to the received tuning signal so as to adjust the impedance position of the target antenna connected to the target antenna port; wherein the tuning signal is related to the power of the radio frequency signal output by the first transmitting circuit or the second transmitting circuit, and the target antenna port is one of the first antenna port and the second antenna port.

2. The radio frequency device according to claim 1, characterized in that: The gating tuning circuit has a plurality of first ends and a plurality of second ends, the plurality of first ends of the gating tuning circuit are respectively connected to the output end of the first transmitting circuit, and the plurality of second ends of the gating tuning circuit are respectively connected to the first antenna port and the second antenna port; The gate tuning circuit comprises a closed-loop tuning circuit and a gate switch, wherein a plurality of first ends of the gate switch serve as a plurality of first ends of the gate tuning circuit, and a plurality of second ends of the gate switch serve as a plurality of second ends of the gate tuning circuit, wherein the plurality of first ends of the closed-loop tuning circuit are respectively connected to a plurality of first ends of the gate switch; and the plurality of second ends of the closed-loop tuning circuit are respectively connected to a plurality of second ends of the gate switch; The closed-loop tuning circuit has multiple tuning states, the impedance of the closed-loop tuning circuit is different in each tuning state, and the closed-loop tuning circuit is used to be in different tuning states under the action of the tuning signal; The gating switch is used to select and conduct a path between one of the output terminals of the first transmitting circuit and the first antenna port, and a path between the other output terminal of the first transmitting circuit and the second antenna port.

3. The radio frequency device according to claim 1, characterized in that: The radio frequency device is also configured with a power feedback port, and the radio frequency device further comprises: A power detection circuit is connected to the power feedback port, and the power detection circuit is used to couple the radio frequency signal transmitted through the first antenna port or the second antenna port, and output a forward coupling signal and a reverse coupling signal to the processing circuit, so that the processing circuit generates and outputs the tuning signal to the tuning control port according to the forward coupling signal and the reverse coupling signal.

4. The radio frequency device according to claim 3, characterized in that: The power detection circuit comprises: A dual-path bidirectional coupler is coupled and connected to the selection tuning circuit, the first antenna port, and the second antenna port, respectively, and is used to couple the radio frequency signal transmitted through the first antenna or the second antenna to output the forward coupling signal and the reverse coupling signal.

5. The radio frequency device according to claim 4, characterized in that: The two-way bidirectional coupler has a first coupling end and a second coupling end coupled to the gate tuning circuit, a third coupling end coupled to the first antenna port, a fourth coupling end coupled to the second antenna port, and an output end, and the two-way bidirectional coupler includes: a first bidirectional coupler, coupled to the first coupling end and the third coupling end respectively, and configured to couple the radio frequency signal transmitted by the first antenna to output the forward coupling signal and the reverse coupling signal; a second bidirectional coupler, coupled and connected to the second coupling end and the fourth coupling end respectively, and the second bidirectional coupler is used to couple the radio frequency signal transmitted by the second antenna to output the forward coupling signal and the reverse coupling signal; A first switch circuit, wherein a plurality of first ends of the first switch circuit are respectively connected to two coupled output ends of the first bidirectional coupler and two coupled output ends of the second bidirectional coupler, and a second end of the first switch circuit is connected to the power feedback port.

6. The radio frequency device according to claim 1, characterized in that: The first transmitting circuit comprises: A first transmitting unit, wherein an input end of the first transmitting unit is connected to the first transmitting port, and is used to support amplification processing of a target radio frequency signal from the first transmitting port; A first filtering unit, one end of the first filtering unit is connected to the output end of the first transmitting unit, and the other end is connected to the selection tuning circuit, the first filtering unit is used to filter the RF signal output by the first transmitting unit and select to output the target RF signal to the selection tuning circuit.

7. The radio frequency device according to claim 1, characterized in that: The second transmitting circuit comprises: A second transmitting unit, wherein an input end of the second transmitting unit is connected to the second transmitting port, and is used to support amplification processing of a target radio frequency signal from the second transmitting port; A second filtering unit, one end of the second filtering unit is connected to the output end of the second transmitting unit, and the other end is connected to the selection tuning circuit, and the second filtering unit is used to filter the RF signal output by the second transmitting unit and output the target RF signal to the selection tuning circuit.

8. The radio frequency device according to claim 7, characterized in that: The second filtering unit comprises: A first filter, wherein a first end of the first filter is connected to an output end of the second transmitting unit, a second end of the first filter is connected to the selection tuning circuit, and the first filter is used to filter the RF signal transmitted by the second transmitting unit to support output of the target RF signal.

9. The radio frequency device according to claim 8, characterized in that: There are multiple first filters, and different first filters have different bandpass filtering ranges. The second filtering unit further includes: A first selection switch, wherein a first end of the first selection switch is connected to an output end of the second transmitting unit, and a plurality of second ends of the first selection switch are respectively connected to a plurality of first ends of the first filters.

10. The radio frequency device according to any one of claims 1 to 9, characterized in that: The radio frequency device is also configured with a first receiving port and a second receiving port for connecting to the processing circuit; the radio frequency device also includes: The first receiving circuit is respectively connected to the selection tuning circuit, the first receiving port and the second receiving port. The first receiving circuit is used to perform low-noise amplification processing on the radio frequency signal received by the first antenna or the second antenna, and output it to the processing circuit.

11. The radio frequency device according to any one of claims 1 to 9, characterized in that: A frequency band of a target radio frequency signal supported by the first transmitting circuit is at least partially the same as a frequency band of a target radio frequency signal supported by the second transmitting circuit.

12. The radio frequency device according to any one of claims 1 to 9, characterized in that: The target radio frequency signal includes at least one of a radio frequency signal in the N8 frequency band and a radio frequency signal in the N28 frequency band.

13. A radio frequency system, characterized in that: The radio frequency system comprises: The radio frequency device according to any one of claims 1 to 12; A processing circuit, wherein the processing circuit is respectively connected to the first transmitting port, the second transmitting port, and the tuning control port, and the processing circuit is configured to generate and output the tuning signal to the tuning control port according to a received power test signal, wherein the power test signal is used to reflect the power of the radio frequency signal output by the first transmitting circuit or the second transmitting circuit.

14. The radio frequency system according to claim 13, characterized in that: The power test signal includes a forward coupling signal and a reverse coupling signal, and the radio frequency system further includes: A power detection circuit, wherein the power detection circuit is connected to the processing circuit, and the power detection circuit is used to couple the radio frequency signal transmitted through the first antenna port or the second antenna port, and output a forward coupling signal and a reverse coupling signal to the processing circuit.

15. The radio frequency system according to claim 14, characterized in that: The processing circuit is configured to determine a reflection characteristic parameter of a transmission path according to the forward coupling signal and the reverse coupling signal; Determining the real-time impedance position according to the reflection characteristic parameter and the initial impedance position of the load on the Smith chart; wherein the initial impedance position is related to the frequency band of the target radio frequency signal; The tuning parameters of the tuning circuit are adjusted according to the real-time impedance position and the target impedance position so that the distance between the real-time impedance position and the target impedance position after adjustment is smaller than the distance between the real-time impedance position and the target impedance position before adjustment.

16. The radio frequency system according to claim 13, characterized in that: The radio frequency system further includes a radio frequency receiving device, the radio frequency receiving device being configured with a first receiving port for connecting to the processing circuit, a second receiving port, a third antenna port for connecting to a third antenna, and a fourth antenna port for connecting to a fourth antenna; The radio frequency receiving device comprises: A second receiving circuit, wherein the multiple input terminals of the second receiving circuit are respectively connected to the third antenna port and the fourth antenna port, and the multiple output terminals of the second receiving circuit are respectively connected to the first receiving port and the second receiving port of the RF receiving device.

17. The radio frequency system according to claim 16, characterized in that: The second receiving circuit comprises: a third filtering unit, wherein a first end of the third filtering unit is connected to the third antenna port, and the third filtering unit is used to filter the radio frequency signal received by the third antenna and output the target radio frequency signal; a fourth filtering unit, wherein a first end of the fourth filtering unit is connected to the fourth antenna port, and the fourth filtering unit is used to filter the radio frequency signal received by the fourth antenna and output the target radio frequency signal; A receiving unit, wherein the multiple first ends of the receiving unit are respectively connected to the second end of the third filtering unit and the second end of the fourth filtering unit, and the multiple second ends of the receiving unit are respectively connected to the first receiving port and the second receiving port of the RF receiving device.

18. The radio frequency system according to claim 17, characterized in that: The fourth filtering unit comprises: At least one bandpass filter, wherein the first end of the bandpass filter is respectively connected to the multiple first ends of the receiving unit, and the second end of the bandpass filter is connected to the first end of the receiving unit.

19. The radio frequency system according to claim 18, characterized in that: There are multiple bandpass filters, and different bandpass filters have different bandpass filtering ranges, and the fourth filtering unit further includes: A second switching circuit, wherein the first end of the second switching circuit is connected to the fourth antenna port, and the multiple second ends of the second switching circuit are respectively connected to the second ends of the multiple bandpass filters, and the second switching circuit is used to select and transmit the RF signal connected to the fourth antenna port to one of the bandpass filters to support the reception of the target RF signals in different frequency bands.

20. A communication device, characterized in that: Comprising a radio frequency system as claimed in any one of claims 13 to 19.

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