CN220440708U - Radio frequency module, radio frequency front-end circuit and electronic equipment - Google Patents

Abstract

The application discloses a radio frequency module, a radio frequency front-end circuit and electronic equipment, and belongs to the technical field of electronic circuits. Wherein, the radio frequency module includes: the first radio frequency access terminal, the second radio frequency access terminal, the third radio frequency access terminal, the fourth radio frequency access terminal and the first switch, wherein: the fourth radio frequency access end is connected with the first antenna, the third radio frequency access end is connected with the second antenna, and the third radio frequency access end is grounded through the first switch; in the first transmitting state, the first radio frequency access end is conducted with the fourth radio frequency access end, the first switch is in a conducting state, and the second radio frequency access end is coupled with transmitting signals on corresponding channels of the first radio frequency access end and the fourth radio frequency access end; in the first receiving state, the first radio frequency access end is conducted with the fourth radio frequency access end, the second radio frequency access end is conducted with the third radio frequency access end, and the first switch is in an off state; in the switch state, the first switch is in the off state.

Description

Radio frequency module, radio frequency front-end circuit and electronic equipment

Technical Field

The application belongs to the technical field of electronic circuits, and particularly relates to a radio frequency module, a radio frequency front-end circuit and electronic equipment.

Background

With the development of science and technology and economy, smart phones have been increasingly used.

The smart phone adopts a cascade structure of a coupler and a DPDT as shown in fig. 1 when transmitting and receiving signals. Specific:

the smart phone turns on RF1-RF4 when transmitting signals using the RF1-RF4 path. The transmission signal outputted from the radio frequency transceiver TRX is transmitted through the antenna 1 via the coupler and the RF1-RF4 paths. Meanwhile, the coupler couples the transmission signal to provide a basis for power detection of the transmission signal. Correspondingly, when the smart phone receives signals, RF1-RF4 and RF2-RF3 are conducted, the main set received signals received by the antenna 1 reach the TRX end through the RF1-RF4 path and the coupler, and the diversity received signals received by the antenna 2 reach the DRX end through the RF2-RF 3.

From the above, when coupling the transmission signal and selecting the signal path are implemented, two separate devices, i.e., DPDT and coupler, are required, which results in problems of large material cost and layout area.

Disclosure of Invention

The embodiment of the application aims to provide a novel radio frequency module, which can solve the problems of large material cost and large layout area caused by two independent devices, namely a DPDT and a coupler, when coupling of a transmitting signal and selection of a signal path are realized.

In a first aspect, an embodiment of the present application provides a radio frequency module, including: the first radio frequency access terminal, the second radio frequency access terminal, the third radio frequency access terminal, the fourth radio frequency access terminal and the first switch, wherein:

the fourth radio frequency access end is connected with the first antenna, the third radio frequency access end is connected with the second antenna, and the third radio frequency access end is grounded through a first switch;

in a first transmitting state, the first radio frequency access end is conducted with the fourth radio frequency access end, the first switch is in a conducting state, and the second radio frequency access end is coupled with transmitting signals on corresponding channels of the first radio frequency access end and the fourth radio frequency access end;

in a first receiving state, the first radio frequency access end is conducted with the fourth radio frequency access end, the second radio frequency access end is conducted with the third radio frequency access end, and the first switch is in an off state;

in the switch state, the first switch is in an off state.

In a second aspect, an embodiment of the present application provides a radio frequency front-end circuit, where the radio frequency front-end circuit includes a radio frequency module, a first antenna, and a second antenna as described in the first aspect, where:

and a third radio frequency access end in the radio frequency front-end circuit is connected with the first antenna, and a fourth radio frequency access end in the radio frequency front-end circuit is connected with the second antenna.

In a third aspect, an embodiment of the present application provides an electronic device, including the radio frequency front-end circuit of the second aspect.

In an embodiment of the present application, a radio frequency module is provided, including: the first radio frequency access terminal, the second radio frequency access terminal, the third radio frequency access terminal, the fourth radio frequency access terminal and the first switch, wherein: the fourth radio frequency access end is connected with the first antenna, the third radio frequency access end is connected with the second antenna, and the third radio frequency access end is grounded through the first switch; in the first transmitting state, the first radio frequency access end is conducted with the fourth radio frequency access end, the first switch is in a conducting state, and the second radio frequency access end is coupled with transmitting signals on corresponding channels of the first radio frequency access end and the fourth radio frequency access end; in the first receiving state, the first radio frequency access end is conducted with the fourth radio frequency access end, the second radio frequency access end is conducted with the third radio frequency access end, and the first switch is in an off state; in the switch state, the first switch is in the off state. In this embodiment of the present application, by adding the first switch to the conventional switch module to form the radio frequency module, the radio frequency module may implement a function that can be implemented by a conventional DPDT and coupler cascade structure. I.e. one device may replace the two separate devices DPDT and coupler. Therefore, the material cost and the layout area can be reduced, and the problem of large material cost and layout area is solved.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

fig. 1 is a schematic diagram of a cascade structure of a coupler and DPDT in the conventional art;

fig. 2 is a schematic structural diagram of a radio frequency module according to an embodiment of the present application;

fig. 3a is an equivalent schematic diagram of a radio frequency module according to an embodiment of the present application;

fig. 3b is an equivalent schematic diagram of a radio frequency module according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of a radio frequency module according to a second embodiment of the present disclosure;

fig. 5a is an equivalent schematic diagram III of a radio frequency module according to an embodiment of the present application;

fig. 5b is an equivalent schematic diagram of a radio frequency module according to an embodiment of the present application;

fig. 6 is a schematic structural diagram III of a radio frequency module according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of a radio frequency module according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of a radio frequency module according to an embodiment of the present application;

fig. 9a is a schematic diagram of an rf module and an insertion loss corresponding to a conventional coupler according to an embodiment of the present disclosure;

fig. 9b is a schematic diagram of a coupling coefficient corresponding to a radio frequency module and a conventional coupler according to an embodiment of the present application;

fig. 9c is a schematic diagram of isolation between a radio frequency module and a conventional coupler according to an embodiment of the present application.

Reference numerals:

101-a first radio frequency access terminal; 102-a second radio frequency access terminal; 103-a third radio frequency access terminal;

104 a fourth radio frequency access terminal; 105-a first switch; 106-a second switch; 107-a first resistor;

108-a second resistor; 109-a fifth radio frequency access terminal; 110-a third switch; 111-a sixth radio frequency access terminal;

112-fourth switch; 113-a seventh radio access terminal; 114-a fifth switch; 115-eighth radio frequency access terminal;

116-sixth switch; 117-seventh switch; 118-eighth switch; 119-ninth switches;

120-tenth switch; 121-eleventh switch; 122-twelfth switch; 123-thirteenth switch;

124-fourteenth switch.

Detailed Description

Technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application are within the scope of the protection of the present application.

The terms first, second and the like in the description and in the claims, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in sequences other than those illustrated or otherwise described herein, and that the objects identified by "first," "second," etc. are generally of a type and do not limit the number of objects, for example, the first object may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.

For radio frequency high frequencies, there is a power coupling in non-ideal situations even if the switch is open. Taking the DPDT configuration shown in fig. 1 as an example, the RF1 port-RF 4 port is turned on, and both the RF2 port and the RF3 port couple signals on the RF1 port-RF 4 port paths, which can provide a basis for power detection of the signals on the paths. In the actual use process of DPDT, DPDT is often in an undesirable condition. Accordingly, the functions of the coupler can be realized by using the DPDT. On the basis, by improving the DPDT, one DPDT can realize the functions of coupling the transmitting signals and selecting signal paths, which are realized by the cascade structure shown in fig. 1. Thus, the material cost and the layout area can be reduced.

The radio frequency module, the radio frequency front-end circuit and the electronic device provided in the embodiments of the present application are described in detail below with reference to the accompanying drawings by means of specific embodiments and application scenarios thereof.

The embodiment of the present application provides a radio frequency module 100, as shown in fig. 1, including: a first rf access terminal 101, a second rf access terminal 102, a third rf access terminal 103, a fourth rf access terminal 104, and a first switch 105, wherein:

the fourth rf access terminal 104 is connected to the first antenna 201, the third rf access terminal 103 is connected to the second antenna 202, and the third rf access terminal 103 is grounded through the first switch 105;

in the first transmitting state, the first rf access terminal 101 is turned on with the fourth rf access terminal 104, and the first switch 105 is in a turned-on state, and the second rf access terminal 102 is coupled to a transmitting signal on a corresponding path between the first rf access terminal 101 and the fourth rf access terminal 104;

in the first receiving state, the first rf access terminal 101 is turned on with the fourth rf access terminal 104, the second rf access terminal 102 is turned on with the third rf access terminal 103, and the first switch 105 is in an off state;

in the switch state, the first switch 105 is in the off state.

In the embodiment of the present application, the rf module 100 provided in the embodiment of the present application is applied to an rf front-end circuit, and is applicable to a TDD system. The first radio frequency access terminal 101 and the second radio frequency access terminal 102 are typically connected to a radio frequency transceiver.

And, the rf module 100 has two operating states, i.e. a switch state and an rf transmit-receive state. The radio frequency transceiving state at least comprises a first transmitting state and a first receiving state as follows.

In the case that the rf module 100 is in the on-off state, the first switch 105 is turned off. The first radio frequency access terminal 101 corresponds to an RF1 port of the DPDT, the second radio frequency access terminal 102 corresponds to an RF2 port of the DPDT, the third radio frequency access terminal 103 corresponds to an RF3 port of the DPDT, and the fourth radio frequency access terminal 104 corresponds to an RF4 port of the DPDT.

Illustratively, the first RF access terminal 101 is in communication with the fourth RF access terminal 104, the second RF access terminal 102 is in communication with the third RF access terminal 103, and RF1 and RF4 port pass-through, and RF2 and RF3 port pass-through can be realized. Alternatively, the first RF access terminal 101 is turned on with the third RF access terminal 103, and the second RF access terminal 102 is turned on with the fourth RF access terminal 104, so that RF1 and RF3 ports are directly connected, and RF2 and RF4 ports are directly connected. That is, the first rf access terminal 101, the second rf access terminal 102, the third rf access terminal 103, and the fourth rf access terminal 104 in the rf module 100 form a conventional DPDT.

In this embodiment of the present application, the first switch 105 is added on the basis of the first radio frequency access terminal 101, the second radio frequency access terminal 102, the third radio frequency access terminal 103 and the fourth radio frequency access terminal 104, that is, the first switch 105 is added on the conventional DPDT structure, so as to implement coupling of the transmitting signal in the first transmitting state, and further provide a function of detecting the power of the transmitting signal. Specific:

in the case that the rf module 100 is in the first transmitting state of the rf transceiving states, the equivalent structure of the rf module 100 is schematically shown in fig. 3 a. Specifically, the first rf access terminal 101 is turned on with the fourth rf access terminal 104, and the first switch 105 is in a turned-on state. The first RF access terminal 101 corresponds to the RF1 port and is used as a radio frequency transceiver, i.e. a TRX terminal. The transmission signal is transmitted from the first antenna 201 via the corresponding paths of the first rf access terminal 101 and the fourth rf access terminal 104.

And, the second rf access terminal 102 is not conducted with the third rf access terminal 103, and the third rf access terminal 103 is grounded through the conduction of the first switch 105, at this time, the external interference signal received by the second antenna 202 is grounded, which does not cause interference to other devices in the rf front-end circuit, and it can be ensured that the signal coupled by the second rf access terminal 102 is only derived from the paths corresponding to the first rf access terminal 101 and the fourth rf access terminal 104.

Further, due to the non-ideal characteristics of the rf module 100, the second rf access terminal 102 couples signals of the corresponding paths of the first rf access terminal 101 and the fourth rf access terminal 104. Based on this, the rf module 100 can implement the function of a coupler. Further, in the case that the RF2 port corresponding to the second RF access terminal 102 is connected to the receiving port of the RF transceiver, the RF transceiver can complete the detection of the transmitting power of the transmitting signal.

In the case that the rf module 100 is in the first receiving state in the rf transceiving state, the equivalent structure of the rf module 100 is schematically shown in fig. 3 b. Specifically, the first rf access terminal 101 is connected to the fourth rf access terminal 104, the second rf access terminal 102 is connected to the third rf access terminal 103, and the first switch 105 is turned off. At this time, the first RF access terminal 101 corresponds to the RF1 port as a radio frequency transceiver, i.e. a TRX terminal. The RF2 port corresponding to the second RF access terminal 102 is specifically a radio frequency receiving terminal, i.e. a DRX terminal. The main set of receiving signals received by the first antenna 201 are input to the rf transceiver connected to the rf module 100 through the paths corresponding to the fourth rf access terminal 104 and the first rf access terminal 101. And, the diversity reception signal received by the second antenna 202 is input to the radio frequency transceiver through the paths corresponding to the third radio frequency access terminal 103 and the second radio frequency access terminal 102.

Based on the foregoing, it can be known that the radio frequency module provided in the embodiment of the present application can implement the functions implemented by the structure of cascading DPDT and the coupler shown in fig. 1.

In an embodiment of the present application, a radio frequency module is provided, including: the first radio frequency access terminal, the second radio frequency access terminal, the third radio frequency access terminal, the fourth radio frequency access terminal and the first switch, wherein: the fourth radio frequency access end is connected with the first antenna, the third radio frequency access end is connected with the second antenna, and the third radio frequency access end is grounded through the first switch; in the first transmitting state, the first radio frequency access end is conducted with the fourth radio frequency access end, the first switch is in a conducting state, and the second radio frequency access end is coupled with transmitting signals on corresponding channels of the first radio frequency access end and the fourth radio frequency access end; in the first receiving state, the first radio frequency access end is conducted with the fourth radio frequency access end, the second radio frequency access end is conducted with the third radio frequency access end, and the first switch is in an off state; in the switch state, the first switch is in the off state. In this embodiment of the present application, by adding the first switch to the conventional switch module to form the radio frequency module, the radio frequency module may implement a function that can be implemented by a conventional DPDT and coupler cascade structure. I.e. one device may replace the two separate devices DPDT and coupler. Therefore, the material cost and the layout area can be reduced, and the problem of large material cost and layout area is solved.

In one embodiment of the present application, as shown in fig. 4, the rf module 100 further includes: a second switch 106, wherein:

the fourth rf access terminal 104 is grounded through the second switch 106;

in the second transmitting state, the first rf access terminal 101 is turned on with the third rf access terminal 103, the first switch 105 is turned off, the second switch 106 is turned on, and the second rf access terminal 102 couples the transmitting signals on the corresponding paths of the first rf access terminal 101 and the third rf access terminal 103;

in the second receiving state, the first rf access terminal 101 is turned on with the third rf access terminal 103, the second rf access terminal 102 is turned on with the fourth rf access terminal 104, and the first switch 105 and the second switch 106 are both in an off state;

in the switch state, both the first switch 105 and the second switch 106 are in the off state.

In this embodiment of the present application, the radio frequency transceiver state of the radio frequency module 100 further includes a second transmitting state and a second receiving state as follows.

In the case that the rf module 100 is in the on-off state, both the first switch 105 and the second switch 106 are turned off. The first radio frequency access terminal 101 corresponds to an RF1 port of the DPDT, the second radio frequency access terminal 102 corresponds to an RF2 port of the DPDT, the third radio frequency access terminal 103 corresponds to an RF3 port of the DPDT, and the fourth radio frequency access terminal 104 corresponds to an RF4 port of the DPDT.

Illustratively, the first RF access terminal 101 is connected to the second RF access terminal 102, and the fourth RF access terminal 104 is connected to the third RF access terminal 103, so that RF1 and RF2 port pass-through, and RF4 and RF3 port pass-through can be realized. That is, the first rf access terminal 101, the second rf access terminal 102, the third rf access terminal 103, and the fourth rf access terminal 104 in the rf module 100 form a conventional DPDT.

In this embodiment of the present application, the second switch 106 is added on the basis of the first radio frequency access terminal 101, the second radio frequency access terminal 102, the third radio frequency access terminal 103, the fourth radio frequency access terminal 104 and the first switch 105, that is, the second switch 106 is continuously added on the conventional DPDT structure, so as to implement coupling of the transmitting signal in the second transmitting state, and further provide a function of detecting the power of the transmitting signal. Specific:

in the case that the rf module 100 is in the second transmitting state of the rf transceiving states, the equivalent structure of the rf module 100 is schematically shown in fig. 5 a. Specifically, the first rf access terminal 101 is turned on with the third rf access terminal 103, the second switch 106 is turned on, and the first switch 105 is turned off. The first RF access terminal 101 corresponds to the RF1 port and is used as a radio frequency transceiver, i.e. a TRX terminal. The transmission signal is transmitted from the second antenna 202 via the corresponding paths of the first rf access terminal 101 and the third rf access terminal 103.

And, the second rf access terminal 102 is not conducted with the fourth rf access terminal 104, and the fourth rf access terminal 104 is grounded through the conduction of the first switch 105, so that the external interference signal received by the first antenna 201 is grounded, which does not cause interference to other devices in the rf front-end circuit, and ensures that the signal coupled by the second rf access terminal 102 is only derived from the corresponding paths of the first rf access terminal 101 and the third rf access terminal 103.

Further, due to the non-ideal characteristics of the rf module 100, the second rf access terminal 102 couples signals of corresponding paths of the first rf access terminal 101 and the third rf access terminal 103. Based on this, the rf module 100 can implement the function of a coupler. Furthermore, under the condition that the RF2 port corresponding to the second radio frequency access terminal is connected to the receiving port of the radio frequency transceiver, the radio frequency transceiver can complete the detection of the transmitting power of the transmitting signal.

In the case that the rf module 100 is in the second receiving state in the rf transceiving state, the equivalent structure of the rf module 100 is schematically shown in fig. 5 b. Specifically, the first rf access terminal 101 is turned on with the third rf access terminal 103, the second rf access terminal 102 is turned on with the fourth rf access terminal 104, and the first switch 105 and the second switch 106 are both turned off. At this time, the first RF access terminal 101 corresponds to the RF1 port as a radio frequency transceiver, i.e. a TRX terminal. The RF2 port corresponding to the second RF access terminal 102 is specifically a radio frequency receiving terminal, i.e. a DRX terminal. The main set of receiving signals received by the second antenna 202 are input to the rf transceiver connected to the rf module 100 through the paths corresponding to the third rf access terminal 103 and the first rf access terminal 101. And, the diversity reception signal received by the first antenna 201 is input to the radio frequency transceiver through the paths corresponding to the fourth radio frequency access terminal 104 and the second radio frequency access terminal 102.

Based on the above, in the second transmitting state, the rf module 100 provided in the embodiment of the present application may still implement the functions implemented by the structure of the DPDT and the coupler cascade shown in fig. 1.

In an embodiment of the present application, as shown in fig. 6, the radio frequency module 100 provided in the embodiment of the present application further includes a first resistor 107, where:

the first switch 105 is grounded through a first resistor 107.

As shown in fig. 1, a resistor is connected to one port of the conventional coupler. Based on this, in the embodiment of the present application, the first switch 105 is grounded through the first resistor 107, so that the conventional coupler can be better simulated. In addition, the impedance matching of the path corresponding to the rf module 100 can be realized through the first resistor 107.

In one example, the first resistor 107 has a resistance of 50 ohms. Wherein 50 ohms is the impedance of the conventional rf path matched to the impedance. Therefore, the first resistor 107 can better match the impedance of the path corresponding to the rf module 100.

In an embodiment of the present application, as shown in fig. 6, the radio frequency module 100 provided in the embodiment of the present application further includes a second resistor 108, where:

the second switch 106 is grounded through a second resistor 108.

As shown in fig. 1, a resistor is connected to one port of the conventional coupler. Based on this, in the embodiment of the present application, the second switch 106 is grounded through the second resistor 108, so that the conventional coupler can be better simulated. In addition, the impedance matching of the path corresponding to the rf module 100 can be achieved through the second resistor 108.

In one example, the second resistor 108 has a resistance of 50 ohms. Wherein 50 ohms is the impedance of the conventional rf path matched to the impedance. Therefore, the second resistor 108 can better match the impedance of the path corresponding to the rf module 100.

In combination with the above two embodiments, in one embodiment of the present application, the radio frequency module 110 provided in the embodiment of the present application includes: a first resistor 107 and a second resistor 108, wherein:

the first switch 105 is grounded through a first resistor 107;

the second switch 106 is grounded through a second resistor 108.

And, in one embodiment of the present application, the resistance values of the first resistor 107 and the second resistor 108 are both 50 ohms.

In an embodiment of the present application, the rf module 100 as provided in the embodiment of fig. 7 further includes a fifth rf access terminal 109, a third switch 110, a sixth rf access terminal 111, and a fourth switch 112, where:

the fifth rf access terminal 109 is disposed between the first rf access terminal 101 and the third rf access terminal 102, and the fifth rf access terminal 109 is grounded through the third switch 110;

the sixth rf access terminal 111 is disposed between the second rf access terminal 102 and the fourth rf access terminal 104, and the sixth rf access terminal 111 is grounded through the fourth switch 112;

in the first transmitting state, the coupling coefficient is the first coupling coefficient, the first rf access terminal 101 is turned on with the fourth rf access terminal 104, and the first switch 105, the third switch 110 and the fourth switch 112 are in a turned-on state;

under the first transmitting state and the coupling coefficient being the second coupling coefficient, the first rf access terminal 101 is turned on with the fourth rf access terminal 104, the first switch 105 is in an on state, and the third switch 110 and the fourth switch 112 are in an off state;

in the first receiving state, the first rf access terminal 101 is turned on with the fourth rf access terminal 104, the second rf access terminal 102 is turned on with the third rf access terminal 103, and the first switch 105, the third switch 110, and the fourth switch 112 are all in an off state;

in the switch state, the first switch 105, the third switch 110, and the fourth switch 112 are all in the off state;

wherein the first coupling coefficient is greater than the second coupling coefficient.

In the embodiment of the application, when the rf module 100 further includes the second switch 106, the second switch 106 is turned off in the first transmitting state and the coupling coefficient is the first coupling coefficient, in the first transmitting state and the coupling coefficient is the second coupling coefficient, in the switching state and in the first receiving state.

In this embodiment, on the basis of the rf module shown in fig. 2, a fifth rf access terminal 109, a third switch 110, a sixth rf access terminal 111, and a fourth switch 112 are added to implement adjustment of a coupling coefficient when the second rf access terminal 102 couples signals of corresponding paths of the first rf access terminal 101 and the fourth rf access terminal 104. Specific:

in the first transmitting state, the third switch 110 and the fourth switch 112 are turned on based on the conduction of the first rf access terminal 101 and the fourth rf access terminal 104 and the conduction of the first switch 105. At this time, the fifth rf access terminal 109 disposed between the first rf access terminal 101 and the third rf access terminal 103 is grounded, and the sixth rf access terminal 110 disposed between the fourth rf access terminal 104 and the second rf access terminal 102 is grounded. In this way, a grounding pin is added between the second rf access terminal 102 and the corresponding paths of the first rf access terminal 101 and the fourth rf access terminal 104, and a part of signals coupled to the second rf access terminal 102 are led to the ground, so that the coupling coefficient is increased. In the embodiment of the present application, when the third switch 110 and the fourth switch 112 are turned on, the coupling coefficient corresponding to the rf module 100 is denoted as the first coupling coefficient.

Conversely, on the basis that the third switch 110 and the fourth switch 112 are turned off, the fifth rf access terminal 109 disposed between the first rf access terminal 101 and the third rf access terminal 103 is suspended, and the sixth rf access terminal 112 disposed between the fourth rf access terminal 104 and the second rf access terminal 102 is suspended. At this time, the coupling coefficient of the rf module 100 becomes smaller. In the embodiment of the present application, when the third switch 110 and the fourth switch 112 are turned off, the coupling coefficient corresponding to the rf module 100 is denoted as the second coupling coefficient.

In an embodiment of the present application, in order to enable the coupling coefficient of the rf module 100 to be adjustable in the second transmitting state, as shown in fig. 8, the rf module 100 provided in the embodiment of the present application further includes: a seventh rf access terminal 113, a fifth switch 114, an eighth rf access terminal 115, and a sixth switch 116, wherein:

the seventh rf access terminal 113 is disposed between the first rf access terminal 101 and the fourth rf access terminal 104, and the seventh rf access terminal 113 is grounded through the fifth switch 115;

the eighth rf access terminal 115 is disposed between the second rf access terminal 102 and the third rf access terminal 103, and the eighth rf access terminal 115 is grounded through the sixth switch 116;

under the second transmitting state and the coupling coefficient being the third coupling coefficient, the first rf access terminal 101 and the third rf access terminal 103 are turned on, and the second switch 106, the fifth switch 114 and the sixth switch 116 are all in an on state, and the first switch 105 is in an off state;

under the second transmitting state and the coupling coefficient being the fourth coupling coefficient, the first rf access terminal 101 is turned on to the third rf access terminal 103, the second switch 106 is in a turned-on state, and the first switch 105, the fifth switch 114 and the sixth switch 116 are all in a turned-off state;

in the second receiving state, the first rf access terminal 101 is turned on with the third rf access terminal 103, the second rf access terminal 102 is turned on with the fourth rf access terminal 104, and the first switch 105, the second switch 106, the fifth switch 114 and the sixth switch 116 are all in an off state;

in the switch state, the first switch 105, the second switch 106, the fifth switch 114, and the sixth switch 116 are all in the off state;

wherein the third coupling coefficient is greater than the fourth coupling coefficient.

In this embodiment, in the second transmitting state, the first rf access terminal 101 is turned on with the third rf access terminal 103, the second switch 106 is turned on, and the fifth switch 114 and the sixth switch 116 are turned on based on the first switch 105 being turned off. At this time, the seventh rf access terminal 113 disposed between the first rf access terminal 101 and the fourth rf access terminal 104 is grounded, and the eighth rf access terminal 115 disposed between the second rf access terminal 102 and the third rf access terminal 103 is grounded. In this way, a grounding pin is added between the second rf access terminal 102 and the corresponding paths of the first rf access terminal 101 and the third rf access terminal 103, and a part of signals coupled to the second rf access terminal 102 are led to the ground, so that the coupling coefficient is increased. In the embodiment of the present application, when the fifth switch 114 and the sixth switch 116 are turned on, the coupling coefficient corresponding to the rf module 100 is denoted as a third coupling coefficient.

Conversely, on the basis that the fifth switch 114 and the sixth switch 116 are turned off, the seventh rf access terminal 113 disposed between the first rf access terminal 101 and the fourth rf access terminal 104 is suspended, and the eighth rf access terminal 115 disposed between the second rf access terminal 102 and the third rf access terminal 103 is suspended. At this time, the coupling coefficient of the rf module 100 becomes smaller. In the embodiment of the present application, when the fifth switch 114 and the sixth switch 116 are turned off, the coupling coefficient corresponding to the rf module 100 is denoted as a fourth coupling coefficient.

In one embodiment of the present application, as shown in fig. 8, the radio frequency module 100 provided in the embodiment of the present application further includes: a seventh switch 117, an eighth switch 118, a ninth switch 119, and a tenth switch 120, wherein:

the fourth rf access terminal 104, the seventh switch 117, the sixth rf access terminal 111, the eighth switch 118, and the second rf access terminal 102 are sequentially connected;

the first rf access terminal 101, the ninth switch 119, the fifth rf access terminal 109, the tenth switch 120, and the third rf access terminal 103 are sequentially connected;

in the first transmitting state or the first receiving state, at least one of the seventh switch 117 and the eighth switch 118 is in an off state, and at least one of the ninth switch 119 and the tenth switch 120 is in an off state.

In one embodiment of the present application, as shown in fig. 8, the radio frequency module 100 provided in the embodiment of the present application further includes: eleventh switch 121, twelfth switch 122, thirteenth switch 123, and fourteenth switch 124, wherein:

the fourth rf access terminal 104, the eleventh switch 121, the seventh rf access terminal 113, the twelfth switch 122, and the first rf access terminal 101 are sequentially connected;

the second rf access terminal 102, the thirteenth switch 123, the eighth rf access terminal 115, the fourteenth switch 124, and the third rf access terminal 103 are sequentially connected;

in the second transmitting state or the second receiving state, at least one of the eleventh switch 121 and the twelfth switch 122 is in an off state, and at least one of the thirteenth switch 123 and the fourteenth switch 124 is in an off state.

Based on this, on the basis of the configuration shown in fig. 8, the on-off conditions corresponding to the switch in the first emission state and the second emission state are shown in table 1 below. And, in the first receiving state and the second receiving state, the on-off condition corresponding to the switch is as shown in the following table 2.

TABLE 1

TABLE 2

Note that, in table 2, the switch, which is not mentioned, may be turned on or off.

Specifically, for example, in the first emission state, the fourth switch 112, the sixth switch 116, and the third switch 110 may be turned on or off. The interaction between the rf access terminals can also be reduced when the third switch 110, the sixth switch 116 and the fourth switch 112 are in the on state.

In the second transmitting state, the sixth switch 116, the fourth switch 112, and the fifth switch 114 may be on or off. The interaction between the rf access terminals can also be reduced when the sixth switch 116, the fourth switch 112 and the fifth switch 114 are in the on state.

In the first receiving state, the fourth switch 112 and the third switch 110 may be turned on or off. In the case where the fourth switch 112 and the third switch 110 are turned on, the interaction between the two paths can be reduced.

And in the second receiving state, the fifth switch 114 and the sixth switch 116 may be turned on or off. In the case where the fifth switch 114 and the sixth switch 116 are on, the interaction between the two paths is reduced.

In this application, the rf module and the conventional coupler provided in the embodiments of the present application are tested, and the schematic diagram of the insertion loss corresponding to the rf module and the conventional coupler is shown in fig. 9 a. The coupling coefficients of the rf module and the conventional coupler are shown in fig. 9 b. The isolation between the rf module and the conventional coupler is shown in fig. 9 c.

As can be seen from fig. 9a, 9b and 9c, compared with the conventional coupler stage, the rf module provided in the embodiment of the present application can still meet the performance requirements required by normal operation, although there is a certain performance loss in terms of the insertion loss, the coupling coefficient and the isolation.

The embodiment of the application also provides a radio frequency front-end circuit, which comprises the radio frequency module, the first antenna and the second antenna, wherein the radio frequency module, the first antenna and the second antenna are provided by any embodiment, and the radio frequency front-end circuit comprises:

and a third radio frequency access end in the radio frequency front-end circuit is connected with the first antenna, and a fourth radio frequency access end in the radio frequency front-end circuit is connected with the second antenna.

The embodiment of the application also provides electronic equipment, which comprises the radio frequency front-end circuit provided by the embodiment.

The embodiments of the present application have been described above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those of ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are also within the protection of the present application.

Claims (10)

1. A radio frequency module, comprising: the first radio frequency access terminal, the second radio frequency access terminal, the third radio frequency access terminal, the fourth radio frequency access terminal and the first switch, wherein:

the fourth radio frequency access end is connected with the first antenna, the third radio frequency access end is connected with the second antenna, and the third radio frequency access end is grounded through a first switch;

in a first transmitting state, the first radio frequency access end is conducted with the fourth radio frequency access end, the first switch is in a conducting state, and the second radio frequency access end is coupled with transmitting signals on corresponding channels of the first radio frequency access end and the fourth radio frequency access end;

in a first receiving state, the first radio frequency access end is conducted with the fourth radio frequency access end, the second radio frequency access end is conducted with the third radio frequency access end, and the first switch is in an off state;

in the switch state, the first switch is in an off state.

2. The radio frequency module of claim 1, further comprising: a second switch, wherein:

the fourth radio frequency access terminal is grounded through the second switch;

in a second transmitting state, the first radio frequency access end is conducted with the third radio frequency access end, the first switch is in an off state, the second switch is in an on state, and the second radio frequency access end is coupled with transmitting signals on corresponding channels of the first radio frequency access end and the third radio frequency access end;

in a second receiving state, the first radio frequency access end is conducted with the third radio frequency access end, the second radio frequency access end is conducted with the fourth radio frequency access end, and the first switch and the second switch are in an off state;

in the switch state, the first switch and the second switch are both in an off state.

3. The radio frequency module of claim 2, further comprising: a first resistor and a second resistor, wherein:

the first switch is grounded through the first resistor;

the second switch is grounded through the second resistor.

4. The radio frequency module of claim 3, wherein the first resistor and the second resistor each have a resistance of 50 ohms.

5. The radio frequency module of claim 1, further comprising: fifth radio frequency access terminal, third switch, sixth radio frequency access terminal and fourth switch, wherein:

the fifth radio frequency access end is arranged between the first radio frequency access end and the third radio frequency access end, and is grounded through the third switch;

the sixth radio frequency access end is arranged between the second radio frequency access end and the fourth radio frequency access end, and the sixth radio frequency access end is grounded through the fourth switch;

under a first transmitting state and a coupling coefficient being a first coupling coefficient, the first radio frequency access end and the fourth radio frequency access end are conducted, and the first switch, the third switch and the fourth switch are in a conducting state;

under a first transmitting state and a coupling coefficient being a second coupling coefficient, the first radio frequency access end and the fourth radio frequency access end are conducted, the first switch is in a conducting state, and the third switch and the fourth switch are in a disconnecting state;

in a first receiving state, the first radio frequency access end is conducted with the fourth radio frequency access end, the second radio frequency access end is conducted with the third radio frequency access end, and the first switch, the third switch and the fourth switch are all in an off state;

in a switch state, the first switch, the third switch and the fourth switch are all in an off state;

wherein the first coupling coefficient is greater than the second coupling coefficient.

6. The radio frequency module of claim 2, further comprising: seventh radio frequency access terminal, fifth switch, eighth radio frequency access terminal and sixth switch, wherein:

the seventh radio frequency access end is arranged between the first radio frequency access end and the fourth radio frequency access end, and the seventh radio frequency access end is grounded through the fifth switch;

the eighth radio frequency access end is arranged between the second radio frequency access end and the third radio frequency access end, and is grounded through the sixth switch;

under the second transmitting state and the coupling coefficient being a third coupling coefficient, the first radio frequency access end and the third radio frequency access end are conducted, the second switch, the fifth switch and the sixth switch are all in a conducting state, and the first switch is in a disconnecting state;

under a second transmitting state and a fourth coupling coefficient, the first radio frequency access end is conducted with the third radio frequency access end, the second switch is in a conducting state, and the first switch, the fifth switch and the sixth switch are all in a disconnecting state;

in a second receiving state, the first radio frequency access end is conducted with the third radio frequency access end, the second radio frequency access end is conducted with the fourth radio frequency access end, and the first switch, the second switch, the fifth switch and the sixth switch are all in an off state;

in a switch state, the first switch, the second switch, the fifth switch and the sixth switch are all in an off state;

wherein the third coupling coefficient is greater than the fourth coupling coefficient.

7. The radio frequency module of claim 5, further comprising: seventh switch, eighth switch, ninth switch and tenth switch, wherein:

the fourth radio frequency access terminal, the seventh switch, the sixth radio frequency access terminal, the eighth switch and the second radio frequency access terminal are sequentially connected;

the first radio frequency access terminal, the ninth switch, the fifth radio frequency access terminal, the tenth switch and the third radio frequency access terminal are sequentially connected;

in a first transmitting state or a first receiving state, at least one of the seventh switch and the eighth switch is in an off state, and at least one of the ninth switch and the tenth switch is in an off state.

8. The radio frequency module of claim 6, further comprising: eleventh, twelfth, thirteenth, and fourteenth switches, wherein:

the fourth radio frequency access terminal, the eleventh switch, the seventh radio frequency access terminal, the twelfth switch and the first radio frequency access terminal are connected in sequence;

the second radio frequency access terminal, the thirteenth switch, the eighth radio frequency access terminal, the fourteenth switch and the third radio frequency access terminal are sequentially connected;

in a second transmitting state or a second receiving state, at least one of the eleventh switch and the twelfth switch is in an off state, and at least one of the thirteenth switch and the fourteenth switch is in an off state.

9. A radio frequency front-end circuit comprising the radio frequency module of any of claims 1-8, a first antenna, and a second antenna, wherein:

and a third radio frequency access end in the radio frequency front-end circuit is connected with the first antenna, and a fourth radio frequency access end in the radio frequency front-end circuit is connected with the second antenna.

10. An electronic device comprising the radio frequency front-end circuit of claim 9.