CN209748553U - Radio frequency circuit and terminal equipment - Google Patents

Abstract

the utility model provides a radio frequency circuit and terminal equipment, the radio frequency circuit includes control chip, first radio frequency transceiver, second radio frequency transceiver, first transceiver circuit, second transceiver circuit and switch unit; the control chip is electrically connected with the first radio frequency transceiver, the second radio frequency transceiver and the switch unit respectively; the transmitting end of the first radio frequency transceiver is electrically connected with the radio frequency signal input end of the first transceiver circuit or the radio frequency signal input end of the second transceiver circuit through the switch unit; the receiving end of the first radio frequency transceiver is electrically connected with the radio frequency signal output end of the first transceiver circuit; the transmitting end of the second radio frequency transceiver is electrically connected with the radio frequency signal input end of the first transceiver circuit or the radio frequency signal input end of the second transceiver circuit through the switch unit; the receiving end of the second radio frequency transceiver is electrically connected with the radio frequency signal output end of the second transceiver circuit. The embodiment of the utility model provides a solve and increased the higher problem of cost that sends the route and lead to terminal equipment.

Description

RF circuits and terminal equipment

technical field

The utility model relates to the technical field of communication equipment, in particular to a radio frequency circuit and terminal equipment.

Background technique

As we all know, in order to realize the Long Term Evolution (LET) and 5G New Radio (NR) Dual Connectivity (EN-DC) under the Non-Stand Alone (NSA) architecture, the existing terminal equipment Usually two transceiver circuits are provided. As shown in FIG. 1 , the radio frequency circuit of the terminal device includes a first transceiver circuit 101 and a second transceiver circuit 102 . The first transceiver circuit 101 is used to send and receive 5G signals; the second transceiver circuit 102 is used to send and receive LET signals.

With the development of communication technology, operators continue to increase the demand for high-power receiving terminals (High Power UE, HPUE), hoping to use HPUE to compensate for downlink (Down Link, DL) and uplink (Up Link, UL) Due to the imbalance between budgets, the terminal equipment required by the Stand Alone (SA) architecture must have the capability of uplink 2*2 Multiple-Input Multiple-Output (MIMO). These two methods can effectively improve Mobile network coverage improves user experience, but HPUE puts forward higher requirements on the performance of power amplifiers (Power Amplifier, PA) and filters. In order to achieve uplink 2*2 MIMO, it is usually necessary to increase the transmission TX channel, so that the terminal equipment Hardware costs are higher.

Utility model content

The embodiment of the utility model provides a radio frequency circuit and a terminal device to solve the problem of increasing the cost of the terminal device due to the increase of transmission paths.

In the first aspect, the embodiment of the utility model provides a radio frequency circuit, including a control chip, a first radio frequency transceiver, a second radio frequency transceiver, a first transceiver circuit, a second transceiver circuit and a switch unit;

The control chip is electrically connected to the first radio frequency transceiver, the second radio frequency transceiver and the switch unit;

The sending end of the first radio frequency transceiver is electrically connected to the radio frequency signal input end of the first transceiver circuit or the radio frequency signal input end of the second transceiver circuit through the switch unit; The receiving end is electrically connected to the radio frequency signal output end of the first transceiver circuit;

The sending end of the second radio frequency transceiver is electrically connected to the radio frequency signal input end of the first transceiver circuit or the radio frequency signal input end of the second transceiver circuit through the switch unit; The receiving end is electrically connected to the radio frequency signal output end of the second transceiver circuit.

In the second aspect, the embodiment of the present utility model also provides a terminal device, including a radio frequency circuit, and the radio frequency circuit includes a control chip, a first radio frequency transceiver, a second radio frequency transceiver, a first transceiver circuit, a second transceiver circuit and switch unit;

The control chip is electrically connected to the first radio frequency transceiver, the second radio frequency transceiver and the switch unit;

The sending end of the first radio frequency transceiver is electrically connected to the radio frequency signal input end of the first transceiver circuit or the radio frequency signal input end of the second transceiver circuit through the switch unit; The receiving end is electrically connected to the radio frequency signal output end of the first transceiver circuit;

The sending end of the second radio frequency transceiver is electrically connected to the radio frequency signal input end of the first transceiver circuit or the radio frequency signal input end of the second transceiver circuit through the switch unit; The receiving end is electrically connected to the radio frequency signal output end of the second transceiver circuit.

In the embodiment of the present invention, the switching unit is set to control the transmission end of the first radio frequency transceiver, the transmission end of the second radio frequency transceiver, the radio frequency signal input end of the first transceiver circuit, and the radio frequency signal input end of the second transceiver circuit. connected state, so that the multiplexing of radio frequency signal transmission in the first transceiver circuit and the second transceiver circuit can be realized, and the uplink 2*2 MIMO requirement can be met. Therefore, the embodiment of the utility model reduces the cost of the radio frequency circuit, thereby reducing the cost of the terminal equipment. In addition, only adding the switch unit can reduce the space occupied by the layout of the radio frequency circuit, which is beneficial to the miniaturization design of the terminal equipment.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments of the utility model. Obviously, the accompanying drawings in the following description are only some of the utility models. Embodiments, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without paying creative labor.

Fig. 1 is a structural diagram of a traditional radio frequency circuit;

Fig. 2 is a structural diagram of a radio frequency circuit provided by an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. . Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Unless otherwise defined, the technical terms or scientific terms used in the utility model shall have the usual meanings understood by those with ordinary skills in the field to which the utility model belongs. "First", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Likewise, words like "a" or "one" do not indicate a limitation of quantity, but mean that there is at least one. Words such as "connected" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "Down", "Left", "Right" and so on are only used to indicate the relative positional relationship. When the absolute position of the described object changes, the relative positional relationship also changes accordingly.

The rapid development of 4G network has greatly enriched our life. In order to pursue higher speed, lower delay and higher reliability, 5G communication technology has emerged as the times require. The arrival of 5G network will enable smart cities, AR/ VR, unmanned driving, etc. will soon become a reality. From the agreement, we can see that 5G communication is divided into FR1 and FR2 according to the frequency. The frequency range of FR1 is 450MHz-6000MHz, which is commonly known as sub 6GHz, and the frequency range of FR2 is 24250MHz-52600MHz. It is commonly known as the millimeter wave frequency band; the frequency division of part of the 5G NR frequency band is the same as that of the LTE frequency band, and this part of the frequency band is the so-called refarming frequency band.

There are two implementation methods of 5G NR network architecture, NSA and SA. The SA method needs to rebuild the core network, and the 5G control and data are all in the 5G network. The NSA method is based on the existing 4G network and deploys the 5G network. The 5G carrier of the architecture only carries user data, and the control signaling is still transmitted through the 4G network.

The NSA method does not require a new core network. In order to ensure the smooth transition and forward compatibility of the communication system, the current international and domestic mainstream operations adopt the NSA network architecture in the first stage, that is, terminal equipment needs to implement LTE and 5G NR dual connectivity (EN -DC), in order to realize this function, the terminal equipment must have two independent hardware channels of LTE and 5G NR. With the development of the 5G network, the SA architecture will be adopted in the second phase, and the corresponding terminal equipment requires 5G NR uplink to achieve two simultaneous transmissions to meet the uplink 2*2 MIMO requirements.

For this reason, the implementation of the utility model provides a radio frequency circuit. With reference to FIG. , the second transceiver circuit 25 and the switch unit 26;

The control chip 21 is electrically connected to the first radio frequency transceiver 22, the second radio frequency transceiver 23 and the switch unit 26, respectively;

The sending end of the first radio frequency transceiver 22 is electrically connected to the radio frequency signal input end of the first transceiver circuit 24 or the radio frequency signal input end of the second transceiver circuit 25 through the switch unit 26; The receiving end of the radio frequency transceiver 22 is electrically connected to the radio frequency signal output end of the first transceiver circuit 24;

The sending end of the second radio frequency transceiver 23 is electrically connected to the radio frequency signal input end of the first transceiver circuit 24 or the radio frequency signal input end of the second transceiver circuit 25 through the switch unit 26; The receiving end of the radio frequency transceiver 23 is electrically connected to the radio frequency signal output end of the second transceiver circuit 25 .

The structures of the above-mentioned first radio frequency transceiver 22 and the second radio frequency transceiver 23 can be set according to actual needs. In the embodiment of the present utility model, the above-mentioned first radio frequency transceiver 22 can be a 5G NR transceiver for receiving and sending 5G radio frequency signals; the above-mentioned second radio frequency transceiver 23 can be an LTE radio frequency transceiver for receiving and sending LTE radio frequency signal (such as 4G signal). Similarly, in other embodiments, if applied to an upgrade scenario from 5G to 6G, the first radio frequency transceiver 22 is a radio frequency transceiver for receiving and sending 6G radio frequency signals, and the second radio frequency transceiver 23 is RF transceivers for receiving and transmitting 5G radio frequency signals. In the following embodiments, the first radio frequency transceiver 22 is a 5G NR transceiver and the second radio frequency transceiver 23 is an LTE radio frequency transceiver as specific examples for illustration.

In the embodiment of the present invention, for different network scenarios, the connection states of the first radio frequency transceiver 22 , the second radio frequency transceiver 23 , the first transceiver circuit 24 and the second transceiver circuit 25 are different. This is explained in detail below:

Case 1: In the LTE and 5G NR dual connection scenario, the control chip 21 can control the electrical connection between the transmitting end of the first radio frequency transceiver 22 and the radio frequency signal input end of the first transceiver circuit 24 according to network requirements, and at the same time control the second radio frequency transceiver The transmitting end of the device 23 is electrically connected to the radio frequency signal input end of the second transceiver circuit 25.

At this time, when the first radio frequency transceiver 22 is transmitting an uplink signal, the 5G radio frequency signal is input to the first transceiver circuit 24 through the transmitting end, and is sent to the 5G base station through the first transceiver circuit 24 . During radio frequency signal reception, the wireless signal sent by the 5G base station will be received by the first transceiver circuit 24 and transmitted to the first radio frequency transceiver 22 through the radio frequency signal output terminal of the first transceiver circuit 24 . At the same time, when the second radio frequency transceiver 23 is sending uplink signals, the LTE radio frequency signal is input to the second transceiver circuit 25 through the sending end, and then sent to the LTE base station through the second transceiver circuit 25 . During radio frequency signal reception, the wireless signal sent by the LTE base station will be received by the second transceiver circuit 25 and transmitted to the second radio frequency transceiver 23 through the radio frequency signal output terminal of the second transceiver circuit 25 .

Case 2: In a single LTE network scenario. The terminal equipment using the above radio frequency circuit can shake hands with the base station and report the capability information of the terminal equipment. The capability information includes support for in-band discontinuous uplink carrier aggregation (Up LinkCarrier Aggregation, ULCA). When the demand for uplink services is relatively large and the base station can allocate corresponding resources, the control chip 21 can control the sending end of the second radio frequency transceiver 23 to communicate with the radio frequency signal input end of the first transceiver circuit 24 and the radio frequency signal input end of the second transceiver circuit 25 simultaneously. electrical connection.

At this time, when the second radio frequency transceiver 23 is transmitting an uplink signal, the LTE radio frequency signal is input to the first transceiver circuit 24 and the second transceiver circuit 25 through the transmitting end, and is transmitted to the first transceiver circuit 24 and the second transceiver circuit 25 through the first transceiver circuit 24 and the second transceiver circuit 25. LTE base station sends. When receiving radio frequency signals, the wireless signal sent by the 5G base station will be received by the first transceiver circuit 24 and transmitted to the first radio frequency transceiver 22 through the radio frequency signal output terminal of the first transceiver circuit 24 . At the same time, the wireless signal sent by the LTE base station will be received by the second transceiver circuit 25 and transmitted to the second radio frequency transceiver 23 through the radio frequency signal output end of the second transceiver circuit 25 .

Case 3: Compatible with the uplink 2*2MIMO capability of the terminal device required by the subsequent SA architecture. When the terminal device is registered to the 5G network and the terminal device has a 2TX channel requirement, the control chip 21 can control the transmitting end of the first radio frequency transceiver 22 at the same time It is electrically connected with the radio frequency signal input end of the first transceiver circuit 24 and the radio frequency signal input end of the second transceiver circuit 25 .

At this time, when the first radio frequency transceiver 22 is transmitting an uplink signal, the 5G radio frequency signal is input to the first transceiver circuit 24 and the second transceiver circuit 25 through the transmitting end, and is transmitted to the first transceiver circuit 24 and the second transceiver circuit 25 through the first transceiver circuit 24 and the second transceiver circuit 25 5G base station transmits. When receiving radio frequency signals, the wireless signal sent by the 5G base station will be received by the first transceiver circuit 24 and transmitted to the first radio frequency transceiver 22 through the radio frequency signal output terminal of the first transceiver circuit 24 . At the same time, the wireless signal sent by the LTE base station will be received by the second transceiver circuit 25 and transmitted to the second radio frequency transceiver 23 through the radio frequency signal output end of the second transceiver circuit 25 .

The embodiment of the utility model controls the transmitting end of the first radio frequency transceiver 22, the transmitting end of the second radio frequency transceiver 23, the radio frequency signal input end of the first transceiver circuit 24 and the radio frequency signal of the second transceiver circuit 25 by setting the switch unit 26 The connection state between the input terminals can realize the multiplexing of the radio frequency signal transmission in the first transceiver circuit 24 and the second transceiver circuit 25, and meet the requirement of uplink 2*2 MIMO. Therefore, the embodiment of the utility model reduces the cost of the radio frequency circuit, thereby reducing the cost of the terminal equipment. In addition, only adding the switch unit 26 can reduce the space occupied by the layout of the radio frequency circuit, which is beneficial to the miniaturization design of the terminal equipment.

It should be noted that the structure of the switch unit 26 can be set according to actual needs. For example, in an optional embodiment, the switch unit 26 includes a first electronic switch 261 and a second electronic switch 262. The first radio frequency The sending end of the transceiver 22 is electrically connected to the radio frequency signal input end of the first transceiver circuit 24 or the radio frequency signal input end of the second transceiver circuit 25 through the first electronic switch 261;

The sending end of the second radio frequency transceiver 23 is electrically connected to the radio frequency signal input end of the first transceiver circuit 24 or the radio frequency signal input end of the second transceiver circuit 25 through the second electronic switch 262 .

Optionally, at least one of the first electronic switch 261 and the second electronic switch 262 is a single pole double throw switch. As shown in Figure 2, in the embodiment of the present utility model, the above-mentioned first electronic switch 261 and the second electronic switch 262 are both single-pole double-throw switches. Of course, in other embodiments, other structures can also be used, such as the above-mentioned first The electronic switch 261 can be realized by using two field effect transistors, and the above-mentioned second electronic switch 262 can also be realized by using two field effect transistors. As long as it can be equivalent to the function of a single pole double throw switch.

In addition, in an optional embodiment, the first electronic switch 261 and the first electronic switch 261 can also be integrated into one switch, for example, the one switch is two single-pole double-throw switches, or in an optional embodiment Among them, the above-mentioned switch unit is a double-pole double-throw switch.

Further, based on the above embodiment, in the embodiment of the utility model, the first transceiver circuit 24 includes a first power amplifier 241, a first filter 242, a second filter 243, a first switch 244 and a first antenna 245 ;in,

The input end of the first power amplifier 241 is the radio frequency signal input end of the first transceiver circuit 24, and the output end of the first power amplifier 241 passes through the first filter 242 and the first switch 244 electrical connection;

The output end of the second filter 243 is the radio frequency signal output end of the first transceiver circuit 22, and the input end of the second filter 243 is electrically connected to the first switch 244;

The first antenna 245 is electrically connected to the output end of the first filter 242 or the input end of the second filter 243 through the first switch 244 .

In the embodiment of the present invention, the above-mentioned first switch 244 may be a single-pole double-throw switch. When carrying out radio frequency signal transmission, the first switch 244 controls the first antenna 245 to be connected with the output end of the first filter 242, when carrying out radio frequency signal reception, the first switch 244 controls the first antenna 245 and the first filter 242 input connections.

It should be noted that the first power amplifier 241 and the first filter 242 are the transmit TX path of the first transceiver circuit 24 , and the second filter 243 is the receive RX path of the first transceiver circuit 24 .

Since the first switch 244 is used to switch the TX path of the first transceiver circuit 24 and the RX path of the first transceiver circuit 24 to be respectively connected to the first antenna 245 , this can reduce the number of antennas.

Further, the above-mentioned second transceiver circuit 25 includes a second power amplifier 251, a third filter 252, a fourth filter 253, a second switch 254 and a second antenna 255; wherein,

The input end of the second power amplifier 251 is the radio frequency signal input end of the second transceiver circuit 25, and the output end of the second power amplifier 251 passes through the third filter 252 and the second switch 254 electrical connection;

The output end of the fourth filter 253 is the radio frequency signal output end of the second transceiver circuit 25, and the input end of the fourth filter 253 is electrically connected to the second switch 254;

The second antenna 255 is electrically connected to the output end of the third filter 252 or the input end of the fourth filter 253 through the second switch 254 .

In the embodiment of the present utility model, the above-mentioned second switch 254 may be a single-pole double-throw switch. When carrying out RF signal transmission, the second switch 254 controls the second antenna 255 to be connected to the output end of the third filter 252, and when carrying out RF signal reception, the second switch 254 controls the second antenna 255 to connect to the third filter. 252 input connections.

It should be noted that the second power amplifier 251 and the third filter 252 are the transmit TX path of the second transceiver circuit 25 , and the fourth filter 253 is the receive RX path of the second transceiver circuit 25 .

Since the first switch 244 is used to switch the TX path of the first transceiver circuit 24 and the RX path of the first transceiver circuit 24 to be respectively connected to the first antenna 245 , this can reduce the number of antennas.

It should be noted that the switch unit 26 can implement multiplexing of the TX path of the first transceiver circuit 24 and the TX path of the second transceiver circuit 25 . The TX channel of the first transceiver circuit 24 can realize the transmission of the radio frequency signal sent by the first radio frequency transceiver 22 and also can realize the transmission of the radio frequency signal sent by the second radio frequency transceiver 23 . At the same time, the TX path of the second transceiver circuit 25 can realize the transmission of the radio frequency signal sent by the first radio frequency transceiver 22 and also can realize the transmission of the radio frequency signal sent by the second radio frequency transceiver 23 . For this reason, the power amplifier and filter in the TX path of the first transceiver circuit 24 and the TX path of the second transceiver circuit 25 can be set as 5G radio frequency devices, so that the TX path of the first transceiver circuit 24 and the power amplifier in the second transceiver circuit 25 The TX path of circuit 25 not only supports the transmission of 5G radio frequency signals, but also supports the transmission of LTE radio frequency signals.

The above are only specific embodiments of the present utility model, but the scope of protection of the present utility model is not limited thereto. Anyone familiar with the technical field can easily think of changes or replacements within the technical scope disclosed in the present utility model. All should be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be based on the protection scope of the claims.

Claims (10)

1. a radio frequency circuit is characterized by comprising a control chip, a first radio frequency transceiver, a second radio frequency transceiver, a first transceiving circuit, a second transceiving circuit and a switch unit;

the control chip is electrically connected with the first radio frequency transceiver, the second radio frequency transceiver and the switch unit respectively;

The transmitting end of the first radio frequency transceiver is electrically connected with the radio frequency signal input end of the first transceiver circuit or the radio frequency signal input end of the second transceiver circuit through the switch unit; the receiving end of the first radio frequency transceiver is electrically connected with the radio frequency signal output end of the first transceiving circuit;

The transmitting end of the second radio frequency transceiver is electrically connected with the radio frequency signal input end of the first transceiver circuit or the radio frequency signal input end of the second transceiver circuit through the switch unit; and the receiving end of the second radio frequency transceiver is electrically connected with the radio frequency signal output end of the second transceiving circuit.

2. The radio frequency circuit according to claim 1, wherein the switch unit includes a first electronic switch and a second electronic switch, and the transmitting terminal of the first radio frequency transceiver is electrically connected to the radio frequency signal input terminal of the first transceiver circuit or the radio frequency signal input terminal of the second transceiver circuit through the first electronic switch;

And the transmitting end of the second radio frequency transceiver is electrically connected with the radio frequency signal input end of the first transceiver circuit or the radio frequency signal input end of the second transceiver circuit through the second electronic switch.

3. The radio frequency circuit of claim 2, wherein at least one of the first electronic switch and the second electronic switch is a single pole double throw switch.

4. the radio frequency circuit according to claim 1, wherein the switch unit is a double-pole double-throw switch.

5. The radio frequency circuit according to claim 1, wherein the first transceiver circuit comprises a first power amplifier, a first filter, a second filter, a first switch, and a first antenna; wherein,

The input end of the first power amplifier is the radio frequency signal input end of the first transceiver circuit, and the output end of the first power amplifier is electrically connected with the first switch through the first filter;

the output end of the second filter is the radio frequency signal output end of the first transceiver circuit, and the input end of the second filter is electrically connected with the first switch;

The first antenna is electrically connected to the output terminal of the first filter or the input terminal of the second filter through the first changeover switch.

6. the radio frequency circuit according to claim 5, wherein the first switch is a single pole double throw switch.

7. the radio frequency circuit according to claim 1, wherein the second transceiver circuit comprises a second power amplifier, a third filter, a fourth filter, a second switch, and a second antenna; wherein,

The input end of the second power amplifier is the radio frequency signal input end of the second transceiver circuit, and the output end of the second power amplifier is electrically connected with the second selector switch through the third filter;

The output end of the fourth filter is the radio frequency signal output end of the second transceiver circuit, and the input end of the fourth filter is electrically connected with the second change-over switch;

the second antenna is electrically connected with the output end of the third filter or the input end of the fourth filter through the second selector switch.

8. The radio frequency circuit according to claim 7, wherein the second switch is a single pole double throw switch.

9. The radio frequency circuit according to any of claims 1 to 8, wherein the first radio frequency transceiver is a 5G NR transceiver and the second radio frequency transceiver is an LTE radio frequency transceiver.

10. A terminal device, characterized in that it comprises a radio frequency circuit according to any one of claims 1 to 9.