CN112436845B - Radio frequency L-PA Mid device, radio frequency transceiving system and communication equipment - Google Patents

Abstract

The application provides a radio frequency L-PA Mid device, radio frequency receiving and dispatching system and communication equipment, wherein, radio frequency L-PA Mid device is configured with first low frequency transmission port and at least one receiving port that are used for connecting the radio frequency transceiver and four round of radio frequency ports that are used for connecting the antenna, and radio frequency L-PA Mid device includes: the transmitting circuit is connected with the first low-frequency transmitting port and is used for amplifying a plurality of low-frequency-band signals received by the first low-frequency transmitting port; the receiving circuit is respectively connected with the plurality of receiving ports and is used for amplifying the plurality of low-frequency-band signals received by the transmitting port and outputting the signals to the receiving ports; the switch circuit is respectively and correspondingly connected with the transmitting circuit, the receiving circuit and the four round emitting ports and used for selectively conducting the radio frequency paths between the transmitting circuit and any round emitting port so as to support alternate emission of any low-frequency-band signal among the four round emitting ports, the integration level of the radio frequency device can be improved, and the area is saved.

Description

Radio frequency L-PA Mid device, radio frequency transceiving system and communication equipment

Technical Field

The present application relates to the field of radio frequency technologies, and in particular, to a radio frequency L-PA Mid device, a radio frequency transceiving system, and a communication device.

Background

With the development and progress of the technology, the 5G mobile communication technology is gradually beginning to be applied to electronic devices. The 5G mobile communication technology communication frequency is higher than that of the 4G mobile communication technology. At present, each large operator provides a functional requirement that a 5G NR Signal supports Sounding Reference Signal (SRS), and in order to implement the SRS function of a 5G NR low-frequency band Signal, a structure of a radio frequency device is complex and occupies a large area of a substrate.

Disclosure of Invention

The embodiment of the application provides a radio frequency L-PA Mid device, a radio frequency transceiving system and communication equipment, which can improve the integration level of the radio frequency device and save the area.

A radio frequency L-PA Mid device configured with a first low frequency transmit port and at least one receive port for connection to a radio frequency transceiver and four round-robin ports for connection to antennas, the radio frequency L-PA Mid device comprising:

the transmitting circuit is connected with the first low-frequency transmitting port and is used for amplifying a plurality of low-frequency-band signals received by the first low-frequency transmitting port;

the receiving circuit is respectively connected with the plurality of receiving ports and is used for amplifying the plurality of low-frequency-band signals received by the wheel transmitting port and outputting the signals through the receiving ports;

and the switching circuit is respectively and correspondingly connected with the transmitting circuit, the receiving circuit and the four round emitting ports and is used for selectively conducting the radio frequency paths between the transmitting circuit and the receiving circuit and any round emitting port so as to support alternate emission of any low-frequency band signal among the four round emitting ports.

A radio frequency transceiving system comprising: the antenna comprises a first antenna, a second antenna, a third antenna, a fourth antenna, a radio frequency transceiver and the radio frequency L-PA Mid device, wherein the first antenna, the second antenna, the third antenna and the fourth antenna are respectively connected with four wheel radio ports of the radio frequency L-PA Mid device in a one-to-one correspondence manner; the radio frequency transceiver is respectively connected with a transmitting port and a receiving port of the radio frequency L-PA Mid device to support alternate transmission of any low-frequency band signal among the first antenna, the second antenna, the third antenna and the fourth antenna.

A communication device comprises the radio frequency transceiving system.

The radio frequency L-PA Mid device, the radio frequency transceiving system and the communication equipment comprise the transmitting circuit, the receiving circuit and the switch circuit, so that the radio frequency L-PA Mid device can support the round emission of low-frequency-band signals among four round emission ports, further support the SRS function of 1T4R of the low-frequency-band signals (such as N5, N8, N20 and N28A), avoid the use of an external switch module to support the SRS function, improve the integration level of the device, save the area, for example, save the PCB area of about 13mm ^2, and are beneficial to the miniaturization of the device. In addition, the logic control of the switch circuit, the laying of a power supply network and the like are all provided by the radio frequency L-PA Mid device, so that other elements of the radio frequency PA Mid radio frequency device cannot be influenced, and meanwhile, the cost can be reduced.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is one of the block diagrams of the structure of an RF L-PA Mid device in one embodiment;

FIG. 2 is a second block diagram of the RF L-PA Mid device in one embodiment;

FIG. 3 is a third block diagram of the RF L-PA Mid device in one embodiment;

FIG. 4 is a block diagram of the structure of an RF L-PA Mid device in one embodiment;

FIG. 5 is a block diagram of the structure of an RF L-PA Mid device in one embodiment;

FIG. 6 is a sixth block diagram illustrating the structure of an exemplary RF L-PA Mid device;

FIG. 7 is a seventh block diagram illustrating the structure of an exemplary RF L-PA Mid device;

FIG. 8 is an eighth schematic block diagram of an exemplary RF L-PA Mid device;

FIG. 9 is a pin diagram of the RF L-PA Mid device of FIG. 7;

fig. 10 is a schematic diagram of a package structure of the rf L-PA Mid device in fig. 7;

FIG. 11 is a block diagram of an exemplary RF transceiver system;

FIG. 12 is a second block diagram of the RF transceiver system according to an embodiment;

FIG. 13 is a third block diagram illustrating an exemplary RF transceiver system;

FIG. 14 is a block diagram of an exemplary RF transceiver system;

FIG. 15 is a block diagram of an exemplary RF transceiver system;

fig. 16 is a sixth block diagram illustrating an exemplary rf transceiver system.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, and in order to provide a thorough understanding of the present application, preferred embodiments of the present application are set forth in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete. This application is capable of embodiments in many different forms than those described herein and those skilled in the art will be able to make similar modifications without departing from the spirit of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise. In the description of the present application, "a number" means at least one, such as one, two, etc., unless specifically limited otherwise.

The radio frequency L-PA Mid device according to the embodiment of the present application may be applied to a communication device having a wireless communication function, where the communication device may be a handheld device, a vehicle-mounted device, a wearable device, a computing device or other processing device connected to a wireless modem, and various forms of User Equipment (UE) (e.g., a Mobile phone), a Mobile Station (MS), and the like. For convenience of description, the above-mentioned devices are collectively referred to as a communication device. The network devices may include base stations, access points, and the like.

The embodiment of the application provides a radio frequency L-PA Mid device. The rf L-PA Mid device can be understood as a Power Amplifier module (Power Amplifier Modules including LNAs) With a built-in low noise Amplifier. The radio frequency L-PA Mid device can support receiving and transmitting of low-frequency signals of a plurality of different frequency bands, and achieves receiving switching control, transmitting switching control and switching control between transmitting and receiving of the low-frequency signals. The plurality of low band signals may include low band signals of different bands in a 4G signal, a 5G NR signal, or a 6G signal. Illustratively, the frequency bands of the plurality of low frequency band signals may include at least B8, B12, B20, B26, N8, N5, N20 frequency bands. In addition, the frequency bands of the low-frequency band signals may further include B28A, N28A, B28B, B13, B29 frequency bands and the like. Therefore, the radio frequency L-PA Mid device in the embodiment of the present application may also be referred to as a Low frequency power amplifier module (Low Band PA Mid With LNA, LB L-PA Mid) With a built-in Low noise amplifier.

As shown in fig. 1, in one embodiment, the radio frequency L-PA Mid device may be understood as a package structure, and the radio frequency L-PA Mid device is configured with a first low frequency transmission port 4G LB RFIN and at least one reception port LNA OUT for connecting a radio frequency transceiver, and four radio ports LB ANT, SRS1, SRS2, SRS3 for connecting antennas. The receiving port LNA OUT, the first low-frequency transmitting port 4G LB RFIN, and the round ports LB ANT, SRS1, SRS2, SRS3 configured in the device can be understood as radio frequency pin terminals of the radio frequency L-PA Mid device, and are used for connecting with external devices. In particular, the receiving port LNA OUT and the first low frequency transmitting port 4G LB RFIN may be used for connecting with a radio frequency transceiver. The round ports LB ANT, SRS1, SRS2, SRS3 may be used to connect with antennas, and may output a plurality of low-band signals processed by the radio frequency L-PA Mid device to corresponding antennas, and may also transmit each signal received by the antennas to the radio frequency L-PA Mid device.

Specifically, the radio frequency L-PA Mid device comprises: a transmit circuit 110, a receive circuit 120, and a switch circuit 130. The input terminal of the transmission circuit 110 is connected to the first low frequency transmission port 4G LB RFIN, and the output terminal of the transmission circuit 110 is connected to the switching circuit 130. The transmitting circuit 110 may amplify a plurality of low frequency band signals received by the first low frequency transmitting port 4G LB RFIN. In particular, the transmitting circuit 110 may be provided with a plurality of radio frequency paths to support the transmission of a plurality of low frequency band signals. Illustratively, the low-band signal may include at least the bands B8, B12, B20, B26, N8, N5, and N20, and may further include the bands B28A, N28A, B28B, B13, and B29. The first low-frequency transmission port 4G LB RFIN, the transmission circuit 110, the switch circuit 130, and any one of the round ports (LB ANT, SRS1, SRS2, or SRS3) together form a transmission path, and specifically, the first low-frequency transmission port 4G LB RFIN, the transmission circuit 110, the switch circuit 130, and the round port LB ANT together form a transmission path; the other transmitting path is formed by the first low-frequency transmitting port 4G LB RFIN, the transmitting circuit 110, the switching circuit 130 and the wheel transmitting port SRS 1; the first low-frequency transmitting port 4G LB RFIN, the transmitting circuit 110, the switch circuit 130 and the wheel transmitting port SRS2 form a further transmitting path; the first low-frequency transmission port 4G LB RFIN, the transmission circuit 110, the switch circuit 130, and the wheeling port SRS3 form a further transmission path. That is, four transmission paths may be provided for each low band signal to support multiple transmission control of each low band signal in a time-sharing manner.

In the embodiment of the present application, it should be noted that, for the radio frequency L-PA Mid device, the relationship between 5G NR and 4G LTE is shown in table 1. As can be seen from table 1, some frequency band ranges of 4G LTE and 5G NR are the same. Therefore, the physical channels of N5, N8, N20, N28A, and N28B share the transceiving channels with B5, B8, B20, B28A, and B28B, respectively.

TABLE 14G LTE and 5G NR essential information

The receiving circuit 120 is connected to the switch circuit 130 and the plurality of receiving ports LNAOUT, respectively, and can amplify the received plurality of low frequency band signals, that is, the receiving circuit 120 can support receiving control of any one of the aforementioned low frequency band signals. The receiving circuit 120 may also be provided with a plurality of radio frequency paths for transmitting low-frequency band signals, for example, corresponding radio frequency paths may be provided for the B8, B12, B20, B26, N8, N5, and N20 frequency bands. It should be noted that, corresponding common paths may be set for frequency bands such as B8, B12, B20, B26, N8, N5, and N20, and may also be set according to frequency ranges of the frequency bands, for example, the B26 and the N5 frequency bands may share the same radio frequency path, and the B8 and the N8 frequency bands may share the same radio frequency path.

The receiving path formed by any one of the round ports ANT1, ANT2, ANT3, or ANT4, the switch circuit 130, the receiving circuit 120, and any one of the receiving ports LNA OUT may be a receiving path provided for a low-frequency band signal of each frequency band, so as to support receiving processing of a plurality of low-frequency band signals.

The switch circuit 130 is correspondingly connected to the transmission circuit 110, the reception circuit 120, the four round ports LB ANT, SRS1, SRS2, and SRS3, and is configured to selectively turn on a radio frequency path between the transmission circuit 110 and any round port (LB ANT, SRS1, SRS2, or SRS3), that is, turn on a transmission path of any low-band Signal to support alternate transmission of the low-band Signal among the four round ports LB ANT, SRS1, SRS2, and SRS3, and further support a Sounding Reference Signal (SRS) function of a 5G NR low-band. Meanwhile, the switch circuit 130 can also selectively turn on any receiving path of the low-frequency band signal.

The radio frequency L-PA Mid device includes a transmitting circuit 110, a receiving circuit 120, and a switching circuit 130, so that the radio frequency L-PA Mid device can support round-shooting of low-band signals among four round-shooting ports (LB ANT, SRS1, SRS2, SRS3), and further support the SRS function of 1T4R of 5G NR signals (e.g., N5, N8, N20, N28), that is, the SRS function of 1T 4R. The radio frequency L-PA Mid device only supports uplink single transmission, namely at the same time, only one round transmitting port can be selected from four round transmitting ports (LB ANT, SRS1, SRS2 and SRS3) to transmit SRS information in turn, meanwhile, the selective receiving control of any low-frequency band signal can be supported, and the switching control of receiving and transmitting of a plurality of low-frequency band signals can be realized. By arranging the switch circuit 130 and the four round-shooting ports (LB ANT, SRS1, SRS2 and SRS3) in the radio frequency L-PA Mid device, the use of an external switch module to support the SRS function can be avoided, the integration level of the device can be improved, in addition, the area can be saved, for example, the PCB area of about 13mm 2 can be saved, and the miniaturization of the device is facilitated. In addition, the logic control, the power supply network laying and the like of the switch circuit 130 are provided by the radio frequency L-PA Mid device, so that other elements of the radio frequency PAmid radio frequency device cannot be influenced, and meanwhile, the cost can be reduced.

As shown in fig. 2, in one embodiment, the switching circuit 130 includes a first switching unit 131 and a second switching unit 132. The first switching unit 131 includes a plurality of first terminals and a second terminal, and the second switching unit 132 includes a first terminal and four second terminals. A plurality of first ends of the first switch unit 131 are respectively connected to the transmitting circuit 110 and the receiving circuit 120 correspondingly; the second end of the first switch unit 131 is connected to the first end of the second switch unit 132, and the four second ends of the second switch unit 132 are respectively connected to the four round ports LB ANT, SRS1, SRS2, and SRS3 in a one-to-one correspondence.

Specifically, the first switch unit 131 may be an SPnT switch, and for example, the first switch unit 131 may be an SP9T switch, and the second switch unit 132 may be an SP4T switch. In the embodiment of the present application, n may be set according to the number of the plurality of low-band signals and the internal structural features of the transmitting circuit 110 and the receiving circuit 120, and is not further limited herein.

As shown in FIG. 3, in one embodiment, the switching circuit 130 includes a multi-channel selection switch 133. The multi-channel selection switch 133 includes a plurality of first terminals and four second terminals. That is, the multi-channel selection switch 133 may be understood as a single switch integrating the second switching unit 132 into the first switching unit 131. A plurality of first terminals of the multi-channel selection switch 133 are respectively connected to the transmitting circuit 110 and the receiving circuit 120; the four second ends of the multi-channel selection switch 133 are respectively connected to the four round emission ports in a one-to-one correspondence.

Specifically, the multi-channel selection switch 133 may be a 4PnT switch, and the multi-channel selection switch 133 may be a 4P9T switch, for example. In the embodiment of the present application, n may be set according to the number of the plurality of intermediate frequency signals, the number of the plurality of low frequency band signals, and the internal structural features of the transmitting circuit 110 and the receiving circuit 120, and is not further limited herein.

Based on the rf L-PAMid device as shown in fig. 2 and 3, by providing the first switch unit 131 and the second switch unit 132 or the multi-channel selection switch 133, when the rf L-PA Mid device needs to transmit a signal, it is able to selectively turn on a path between any rf path of the transmitting circuit 110 and any one of the round ports ANT1, ANT2, ANT3, or ANT4, that is, turn on any transmitting path, so as to support the SRS function of a 5G NR signal (e.g., N5, N8, N20, N28). When the rf L-PA Mid device needs to receive a signal, a path between any rf path in the receiving circuit 120 and any round-trip port (LB ANT, SRS1, SRS2, or SRS3) may be selectively turned on, that is, any receiving path is turned on, so as to selectively receive at least one low-band signal.

Meanwhile, the multi-channel selection switch 133 in the radio frequency L-PA Mid device shown in fig. 3 reduces the usage of the primary switch unit, compared with the first switch unit 131 and the second switch unit 132 in the radio frequency L-PA Mid device shown in fig. 2, and thus can reduce the insertion loss of any transmission path. For example, when the multi-channel select switch 133 is a 4P9T switch, the first switch unit 131 is an SP9T switch, and the second switch unit 132 is an SP4T switch, for the transmit path of the N8 band, the insertion loss of the radio frequency L-PA Mid device shown in fig. 3 may be reduced by 0.5dB, and further, the output power of the low-frequency band signal (e.g., the N8 band) at the round-robin port may be increased, so as to achieve 26.0dBm required by the development standard issued by each large operator.

As shown in fig. 4, in one embodiment, the transmitting circuit 110 includes a first power amplifier 111, a third switching unit 112, and a plurality of first filtering units 113. Wherein, the input terminal of the first power amplifier 111 is connected to the first low frequency transmission port 4G LB RFIN, and the output terminal of the first power amplifier 111 is connected to a first terminal of the third switching unit 112. The second terminals of the third switching unit 112 are respectively connected to the switching circuit 130 through a first filtering unit 113. That is, the second terminals of the third switching units 112 are correspondingly connected to one terminal of one first filtering unit 113, and the other terminal of each first filtering unit 113 is correspondingly connected to the switching circuit 130.

The first power amplifier 111 may perform power amplification processing on a plurality of low-frequency band signals received through the first low-frequency transmission port 4G LB RFIN, and further transmit the low-frequency band signals processed by the first power amplifier 111 to each first filtering unit 113 through the third switching unit 112. The first filtering units 113 are configured to perform filtering processing on the low-frequency band signals, and frequency bands of the low-frequency band signals output by the first filtering units 113 are different. It will be appreciated that the filter paths in the plurality of transmit paths are independent of each other and do not coincide with each other. The first filtering unit 113 may correspondingly include a filter that allows only a low frequency band signal of a preset frequency band to pass. For example, if the frequency bands of the low-band signals may be eight different frequency bands, i.e., B12, B8(N8), B20(N20), B26(N5), B13, B2A (B28A), B28B, and B29, eight first filtering units 113 (i.e., eight filters) may be correspondingly disposed to implement filtering processing on the eight low-band signals. Accordingly, the third switching unit 112 may be an SP8T switch, wherein a first terminal of the SP8T switch is connected to the output terminal of the first power amplifier 111, and eight second terminals of the SP8T switch are connected to the eight first filtering units 113 in a one-to-one correspondence. After the filtering processing performed by the eight first filtering units 113, the eight low-frequency signals B12, B8(N8), B20(N20), B26(N5), B13, B2A (B28A), B28B, and B29 can be correspondingly output to the switch circuit 130.

The first low frequency transmitting port 4G LB RFIN, the third switching unit 112, and the first filtering unit 113 may form a radio frequency path, wherein a frequency band of the low frequency band signal output by the first filtering unit 113 corresponds to the radio frequency path of the frequency band. For example, the rf path in which the first filtering unit 113 outputting the B8/N8 band is located may be understood as a B8/N8 rf path, and the rf path in which the first filtering unit 113 outputting the B20/N20 band is located may be understood as a B20/N20 rf path. Further, the first low frequency transmission port 4G LB RFIN, the third switching unit 112, a first filtering unit 113, the switching circuit 130, and any one of the round ports (LB ANT, SRS1 SRS2 or SRS3) constitute a transmission path.

Referring to fig. 4, in particular, the receiving circuit 120 includes at least one low noise amplifier 121, a fourth switching unit 122, and a plurality of second filtering units 123. The output end of each low noise amplifier 121 is correspondingly connected to a receiving port LNA OUT, the output end of each low noise amplifier 121 is correspondingly connected to a first end of the fourth switching unit 122, a plurality of second ends of the fourth switching unit 122 are respectively connected to one ends of the plurality of second filtering units 123 in a one-to-one correspondence manner, and the other end of the second filtering unit 123 is connected to the switching circuit 130.

The second filtering units 123 are respectively configured to filter the received low-frequency band signals, and the frequency band of the low-frequency band signal output by each second filtering unit 123 is different. The second filtering unit 123 has the same function as the first filtering unit 113, and is not described herein again. Any round emission port ANT, the switching circuit 130, the second filtering unit 123, the fourth switching unit 122, the low noise amplifier 121, and any receiving port LNAOUT may form a receiving path.

As shown in fig. 5 and 6, in one embodiment, the number of the receiving ports is three, which may be respectively referred to as LNA OUT1, LNA OUT2, and LNA OUT3, and the number of the low noise amplifiers 121 is two, which may be respectively referred to as a first low noise amplifier 1211 and a second low noise amplifier 1212. When the number of the low noise amplifiers is two, the fourth switching unit 122 thereof includes a first rf switch 1221 and a second rf switch 1222. The first rf switch 1221 and the second rf switch 1222 may be both SP4T switches. The single terminal of the first rf switch 1221 is connected to the input terminal of the first low noise amplifier 1211, and the second terminals of the first rf switch 1221 are respectively connected to the second filtering units 123 in a one-to-one correspondence manner. The plurality of second filtering units 123 connected to the four second terminals of the first rf switch 1221 may include four filters for filtering four low-frequency signals, i.e., B26(N5), B8(N8), B28A (N28A), and B28B, respectively. A single terminal of the second rf switch 1222 is connected to an input terminal of the second low noise amplifier 1212, and a plurality of second terminals of the second rf switch 1222 are connected to the plurality of second filtering units 123 in a one-to-one correspondence. The plurality of second filtering units 123 connected to the four second terminals of the second rf switch 1222 may include four filters for respectively filtering the four low-band signals B12, B20(N20), B13, and B29.

It should be noted that the four filters connected to the first rf switch 1221 are adjacent to the frequency band of the four low-band signals to be filtered, and the four filters connected to the second rf switch 1222 are adjacent to the frequency band of the four low-band signals to be filtered. It should be noted that, in the embodiment of the present application, the second filtering unit 123 connected to the first rf switch 1221 and the second rf switch 1222 is not further limited, and may be set according to actual requirements.

Optionally, the fourth switching unit 122 may also be a DP8T switch. Two first ends of the DP8T switch are respectively connected to the input ends of the two low noise amplifiers 121 in a one-to-one correspondence, and eight second ends of the DP8T switch are respectively connected to the eight second filtering units 123 in a one-to-one correspondence.

In the embodiment of the present application, the number of switches included in the fourth switching unit 122 and the type thereof are not further limited, and may be set according to the set number of the second filtering unit 123 and the low noise amplifier 121.

Referring to fig. 5 and 6, the receiving circuit 120 further includes a fifth switching unit 124 and an attenuator 125. The output end of the first low noise amplifier 1211 is connected to the first end of the fifth switch unit 124, a second end of the fifth switch unit 124 is connected to a receiving port, and another second end of the fifth switch unit 124 is connected to another receiving port through the attenuator 125; the output terminal of the first low noise amplifier 1211 is connected to a further receiving port.

Specifically, the fifth switch unit 124 may be an SPDT switch, wherein a single terminal of the SPDT switch is connected to the output terminal of the first low noise amplifier 1211, a second terminal of the SPDT switch is connected to one receiving port of the radio frequency 3P3T switch, and another second terminal of the SPDT switch is connected to another receiving port through the attenuator 125. The fifth switch unit 124 may be configured to selectively turn on a direct path between the first low noise amplifier 1211 and a receiving port, and may also be configured to selectively turn on a receiving path where the attenuator 125 is located.

In the radio frequency L-PA Mid device in this embodiment, the attenuator 125 is disposed between the output end of the first low noise amplifier 1211 and the receiving port LNA OUT, and if the received low frequency band signal is a high power signal, the attenuation coefficient of the attenuator 125 may be correspondingly adjusted to increase the attenuation of the low frequency band signal, so as to avoid the adverse effect of the high power on the radio frequency L-PA Mid device and/or the radio frequency transceiver.

In one embodiment, the first filtering unit 113 and the second filtering unit 123 may also be connected to the same terminal of the switching circuit 130. For example, filters provided on the transmission path and the reception path for the corresponding filtering process B8(N8) may be respectively connected to the same terminal of the switch circuit 130. In the embodiment of the present application, the number of filters connected to the same terminal of the switch circuit 130 and the frequency band of the low-band signal used for the filtering process of the connected filters are not further limited, and may be set according to the frequency band range of each low-band signal.

In one embodiment, the radio frequency L-PA Mid device further includes a sixth switching unit 126, a plurality of first terminals of the sixth switching unit 126 are connected to the plurality of receiving ports LNA OUT in a one-to-one correspondence, and a plurality of second terminals of the sixth switching unit 126 are connected to the output terminals of the first low noise amplifier 1211 and the second low noise amplifier 1212 in a one-to-one correspondence.

In one embodiment, the plurality of second terminals of the sixth switching unit 126 are connected to the output terminals of the first low noise amplifier 1211, the second low noise amplifier 1212, and the attenuator 125 in a one-to-one correspondence.

By providing the sixth switch unit 126 in the rf L-PA Mid device, the flexibility of the low-band signals output by the multiple receiving ports can be increased, that is, each receiving port can correspondingly output the low-band signal of any frequency band to the rf transceiver.

Based on the radio frequency L-PA Mid device shown in fig. 5, the transceiving control of any low-frequency band signal can be realized. Illustratively, the low-band signal of the N8 band is implemented as an example.

The transmission path of the N8 frequency band is as follows:

the first low frequency transmission port 4G LB RFIN → the first power amplifier 111 → the third switch unit 112 → N8 TX path → the first filter unit 113 → the contact 6 of the first switch unit 131 → the contact 9 of the first switch unit 131 → the single terminal of the second switch unit 132 → the second terminal of the second switch unit 132 → the round port LB ANT.

The receiving path of the N8 frequency band is as follows:

the wheel radio port LB ANT → a second end of the second switch unit 132 → the single terminal of the second switch unit 132 → the contact 9 of the first switch unit 131 → the contact 6 of the first switch unit 131 → the second filter unit 123 → the N8 RX path → the first radio frequency switch 1221 → the first low noise amplifier 1211 → the fifth switch unit 124 (or the fifth switch unit 124 → the attenuator 125) → the sixth switch unit 126 → the reception port LNA OUT1 → the radio frequency transceiver.

Based on the radio frequency L-PA Mid device shown in fig. 6, the transceiving control of any low-frequency band signal can be realized. Illustratively, the low-band signal of the N8 band is implemented as an example.

The transmission path of the N8 frequency band is as follows:

the first low-frequency transmission port 4G LB RFIN → the first power amplifier 111 → the third switch unit 112 → the N8 TX path → the first filter unit 113 → the contact 6 of the multi-channel selection switch 133 → the contact 9 of the multi-channel selection switch 133 → the round port LB ANT.

The receiving path of the N8 frequency band is as follows:

the wheel radio port LB ANT → the contact 9 of the multi-channel selection switch 133 → the contact 6 of the multi-channel selection switch 133 → the second filter unit 123 → the N8 RX path → the first radio frequency switch 1221 → the first low noise amplifier 1211 → the fifth switch unit 124 (or the fifth switch unit 124 → the attenuator 125) → the sixth switch unit 126 → the reception port → the radio frequency transceiver.

The transmission path of the low-frequency band signal of the radio frequency L-PA Mid device shown in fig. 6 is reduced by one switch corresponding to the transmission path of the radio frequency L-PA Mid device shown in fig. 5, so that the insertion loss of 0.5dB can be reduced, and the output power of the N41 frequency band at the round-trip port can be increased, so as to achieve 26.0dBm required by the development standard issued by each large operator. In addition, link insertion loss on a receiving path can be reduced, specifically, 0.25dB is reduced, and the sensitivity of a receiving link can be improved.

As shown in fig. 7-8, in one embodiment, the rf L-PA Mid device is further configured with a plurality of auxiliary transmit ports LB TXOUT1, LB TXOUT2, LB TXOUT3, LB TXOUT4, a plurality of auxiliary transmit and receive ports LB _ TRX1, LB _ TRX2, LB _ TRX3, LB _ TRX4, and a plurality of auxiliary receive ports LNA _ AUX1, LNA _ AUX2, LNA _ AUX3, LNA _ AUX4 for connection with the external switching circuit 90. The plurality of auxiliary transmitting ports LB TXOUT1, LB TXOUT2, LB TXOUT3, LB TXOUT4 are respectively connected to the transmitting circuit 110, and the plurality of auxiliary transmitting/receiving ports LB _ TRX1, LB _ TRX2, LB _ TRX3, LB _ TRX4 are connected to the switch circuit 130; the auxiliary receiving ports LNA _ AUX1, LNA _ AUX2, LNA _ AUX3, and LNA _ AUX4 are connected to the receiving circuit 120.

In one embodiment, a plurality of auxiliary transmit ports LB TXOUT1, LB TXOUT2, LB TXOUT3, LB TXOUT4 may be used to transmit signals in B13, B28A (N28A), B28B, B29 bands. That is, the transmission/reception paths of signals of the four frequency bands B13, B28A (N28A), B28B, and B29 further include an external switching circuit 90. It should be noted that, when the signals of the four frequency bands B13, B28A (N28A), B28B, and B29 are externally hung, the filters of the three frequency bands B13, B28A (N28A), B28B, and B29 may be omitted from the transmitting circuit 110 and the receiving circuit 120. Meanwhile, each switch unit in the transmitting circuit 110, the receiving circuit 120 and the switch circuit 130 can also be adjusted adaptively. Illustratively, the second terminals of the parts of the third switching unit 112 of the transmitting circuit 110 are respectively connected with the first filtering unit 113 in a one-to-one correspondence, and the second terminals of the parts of the third switching unit 112 of the transmitting circuit 110 are respectively connected with the plurality of auxiliary transmitting ports LB TXOUT1, LB TXOUT2, LB TXOUT3, LB TXOUT4 in a one-to-one correspondence. A part of the first ends of the switch circuit 130 are respectively connected to the plurality of first filtering units 113 and the plurality of second filtering units 123 in a one-to-one correspondence, and a part of the first ends of the switch circuit 130 are respectively connected to the plurality of auxiliary transceiving ports LB _ TRX1, LB _ TRX2, LB _ TRX3, and LB _ TRX4 in a one-to-one correspondence. A part of second terminals of the fourth switch unit 122 are connected to the plurality of second filter units 123 in a one-to-one correspondence, and a part of second terminals of the fourth switch unit 122 are connected to the plurality of auxiliary receiving ports LNA _ AUX1, LNA _ AUX2, LNA _ AUX3, and LNA _ AUX 4.

Based on the radio frequency L-PA Mid device shown in FIG. 7, the transceiving control of any low-frequency band signal can be realized. Illustratively, the low-band signal of the N28A band is implemented as an example.

The transmission path of the N28A frequency band is as follows:

the first low frequency transmission port 4G LB RFIN → the first power amplifier 111 → the third switch unit 112 → the N28ATX path → the auxiliary transmission port LB TXOUT2 → the switching circuit 90 → the auxiliary transmission/reception port LB _ TRX2 → the contact 2 of the first switch unit 131 → the single terminal of the second switch unit 132 → a second end of the second switch unit 132 → the wheel ejection port LB ANT.

The receiving path of the N28A frequency band is as follows:

the wheel transmission port LB ANT → a second end of the second switch unit 132 → the single terminal of the second switch unit 132 → the contact 2 of the first switch unit 131 → the auxiliary transmission/reception port LB _ TRX2 → the switching circuit 90 → the auxiliary reception port LNA _ AUX2 → N28A TX path → the third switch unit 112 → the first radio frequency switch 1221 → the first low noise amplifier 1211 → the reception port → the radio frequency transceiver.

IN one embodiment, the radio frequency L-PA Mid device is further configured with a second low frequency transmit port 2G LB RFIN, a high frequency transmit port 2G HB IN and a high frequency output port 2G HB OUT, the radio frequency L-PA Mid device further comprising a second power amplifier 140 and a third power amplifier 150. The input end of the second power amplifier 140 is connected to the second low-frequency transmission port 2G LB RFIN, and the output end of the second power amplifier 140 is connected to a first end of the switch circuit 130, and is configured to amplify the received 2G low-frequency signal; the low-frequency band signals are 4G signals and 5G signals. And an input end of the third power amplifier 150 is connected with the high-frequency transmitting port 2G HB IN, and an output end of the second power amplifier 140 is connected with the high-frequency output port 2G HB OUT, and is used for amplifying the received 2G high-frequency signal.

In the radio frequency L-PA Mid device in this embodiment, the second power amplifier 140 is provided, so that the transmission control of the low-frequency band signal of the 2G signal can be realized. The low-frequency band signal of the 2G signal may include a 900M frequency band of a GSM system, an 800M frequency band of a CDMA system, and the like. By setting the third power amplifier 150, the transmission control of the high-band signal of the 2G signal can be realized, wherein the low-band signal of the 2G signal may include a 900M band of a GSM system, a 800M band of a CDMA system, and the like.

Referring to fig. 7-8, in one embodiment, the radio frequency L-PA Mid device is further configured with a coupling output port CPLOUT, and further includes a coupling circuit 170 disposed in a radio frequency path between the switch circuit 130 and the round-robin port for coupling the low frequency band signal in the radio frequency path to output a coupled signal via the coupling output port CPLOUT. Wherein the coupling circuit 170 may be coupled on a radio frequency path between the first switching unit 131 and the second switching unit 132. Optionally, the coupling circuit 170 may be coupled to the rf path between the multi-channel select switch 133 and any of the round-robin ports (e.g., LB ANT).

Wherein the coupled signal can be used to measure the forward coupled power and the reverse coupled power of the low band signal. Specifically, the coupling circuit 170 includes an input terminal, an output terminal, and a coupling terminal. The input end of the coupling circuit 170 is coupled to the switching circuit 130, the output end of the coupling circuit 170 is coupled to the round emission port, and the coupling end is configured to couple the intermediate frequency signal received by the input end and output a coupling signal, where the coupling signal includes a forward coupling signal and a reverse coupling signal. Based on the forward coupling signal output by the coupling end, the forward power information of the low-frequency band signal can be detected; based on the reverse coupling signal output by the coupling terminal, the reverse power information of the low-frequency band signal can be correspondingly detected, and the detection mode is defined as a reverse power detection mode.

In this embodiment, the radio frequency L-PA Mid device is provided with only one coupling output port CPLOUT, and since low-frequency band signals of multiple frequency bands are not transmitted simultaneously, one coupling output port CPLOUT can also meet communication requirements, and also reduce the complexity of radio frequency routing inside the radio frequency L-PA Mid device, and at the same time, can also improve the isolation performance of each routing of the radio frequency L-PA Mid device.

In one embodiment, the radio frequency L-PA Mid device further includes a first control unit 181 and a second control unit 182. The first control unit 181 is connected to each switch unit and each power amplifier, for example, the first switch unit 131, the second switch units 132 and …, the eighth switch unit, the first power amplifier 111, and the second power amplifier 140, and is used for controlling on/off of each switch unit and controlling an operating state of each power amplifier. The second control unit 182 is connected to each of the low noise amplifiers 121, and is configured to adjust a gain coefficient of each of the low noise amplifiers 121, and further adjust a link loss of a receiving path of each of the intermediate frequency signals and the low frequency band signals, so that sensitivity of the receiving path of each of the intermediate frequency signals and the low frequency band signals can be improved.

The first Control unit 181 and the second Control unit 182 may be Mobile Industry Processor Interface (MIPI) -radio frequency Front End Control Interface (RFFE) Control units or RF Front End Control Interface (RFFE) Control units, and conform to a Control protocol of an RFFE bus. When the first and second control units 181 and 182 are MIPI-RFFE control units or RFFE control units, the rf L-PA Mid devices are further configured with an input pin CLK for a clock signal, an input or bidirectional pin sdata for a single/bidirectional data signal, a power supply pin VDD, a reference voltage pin VIO, and so on, to control the first and second power amplifiers 111 and 140, the switching units, and the low noise amplifier 121.

It should be noted that in the embodiment of the present application, the control logic of each switch unit matches with the control logic of the first control unit 181, and in the embodiment of the present application, the specific types of each switch unit, the first control unit 181, and the second control unit 182 are not further limited.

Based on that each component in the radio frequency L-PA Mid device shown in fig. 7 can be integrally packaged in the same package chip, as shown in fig. 9, each pin in the radio frequency L-PA Mid device (package chip) corresponds to a plurality of ports configured in the radio frequency L-PA Mid device one to one. Through package integration, the package specification of the radio frequency L-PA Mid device is as shown in fig. 10, which can improve the integration level of the radio frequency L-PA Mid device.

The embodiment of the application also provides a radio frequency transceiving system. As shown in fig. 11, in one embodiment, the rf transceiving system includes a first antenna ANT0, a second antenna ANT1, a third antenna ANT2, a fourth antenna ANT3, an rf transceiver 20, and the rf L-PA Mid device 10 in any of the embodiments of fig. 1 to 6. The first antenna ANT0, the second antenna ANT1, the third antenna ANT2 and the fourth antenna ANT3 are respectively connected with four round ports SRS1, SRS2, SRS3 and LB ANT of the radio frequency L-PA Mid device 10 in a one-to-one correspondence manner, that is, the first antenna ANT0 is connected with the round port SRS1, the second antenna ANT1 is connected with the round port SRS2, the third antenna ANT2 is connected with the round port SRS3, and the fourth antenna ANT3 is connected with the round port LB ANT. The radio frequency transceiver 20 is respectively connected to the first low frequency transmitting port 4G LB RFIN and the receiving port LNA OUT of the radio frequency L-PAMid device.

In one embodiment, the first antenna ANT0, the second antenna ANT1, the third antenna ANT2, and the fourth antenna ANT3 may be formed using any suitable type of antenna. For example, the first antenna ANT0, the second antenna ANT1, the third antenna ANT2, and the fourth antenna ANT3 may include antennas having resonant elements formed of the following antenna structures: at least one of an array antenna structure, a loop antenna structure, a patch antenna structure, a slot antenna structure, a helical antenna structure, a strip antenna, a monopole antenna, a dipole antenna, and the like. Different types of antennas may be used for different frequency bands and frequency band combinations. In the embodiment of the present application, the types of the first antenna ANT0, the second antenna ANT1, the third antenna ANT2, and the fourth antenna ANT3 are not further limited.

As shown in fig. 12, in one embodiment, the rf transceiver system includes an rf L-PA Mid device 10 as may be implemented in any of fig. 7-8. The radio frequency transceiving system further comprises a switching circuit 90. The switching circuit 90 is respectively connected to the plurality of auxiliary transmitting ports LB TXOUT1, LB TXOUT2, LB TXOUT3, LB TXOUT4, a plurality of auxiliary transceiving ports LB _ TRX1, LB _ TRX2, LB _ TRX3, LB _ TRX4, and a plurality of auxiliary receiving ports LNA _ AUX1, LNA _ AUX2, LNA _ AUX3, and LNA _ AUX4 of the radio frequency L-PA Mid device 10.

Based on the rf transceiving system shown in fig. 11 and 12, the rf L-PA Mid device 10 includes the transmitting circuit 110, the receiving circuit 120 and the switch circuit 130, so that the rf L-PA Mid device 10 can support round transmission of a plurality of low-frequency signals among four antennas, and further support the SRS function of 1T4R, that is, the SRS function of 1T4R, of 5G NR signals (e.g., N5, N8, N20, N28A), which can avoid using an external switch module outside the rf L-PA Mid device to support the SRS function, can improve the integration level of the rf system, and can also save area, for example, can save PCB area of about 13mm ^2, which is beneficial to miniaturization of the device. In addition, the logic control, the power supply network laying and the like of the switch circuit 130 are provided by the radio frequency L-PA Mid device 10, so that other elements of the radio frequency PA Mid radio frequency device are not affected, and the cost can be reduced.

As shown in fig. 13 and 14, in one embodiment, the rf transceiving system further includes a middle-high frequency L-PA Mid device 30, a low-middle-high frequency diversity device 40, a switch module 50, and a combiner module 60. The middle-high frequency L-PA Mid device 30 is configured with a first antenna port ANT1 and a second antenna port ANT2, and is configured to support transceiving amplification processing of a plurality of middle frequency signals and a plurality of high frequency signals. Specifically, the middle-high frequency L-PA Mid device 30 integrates a plurality of components such as a power amplifier, a low noise amplifier, a filter, and a switch. The medium-high frequency L-PA Mid device 30 may implement transceiving processing on a plurality of medium-frequency 4G, 5G signals and a plurality of high-frequency 4G, 5G signals. The 4G and 5G signals of the plurality of intermediate frequency bands may at least include: 4G and 5G signals of B4, B66, B1, N1, B25, B3, N3, B39 and B30 in frequency band; the plurality of high band 4G, 5G signals may include B7, N7, B40, B41, N41, etc. band 4G, 5G signals.

The low, medium, and high frequency diversity device 40 is configured with a low frequency antenna port LB ANT, a medium, high frequency antenna port MHB ANT, and a medium, high frequency transceiving port MHB TRX1 for supporting diversity reception amplification processing of a plurality of low frequency band signals, a plurality of medium frequency signals, and a plurality of high frequency signals. Specifically, the low, medium, and high frequency diversity device 40 includes a plurality of components such as a low noise amplifier 121, a filter, and a switch. The low, medium and high frequency diversity device 40 may implement a receiving process for a plurality of low, medium and high frequency band 4G signals, where the low, medium and high frequency band 4G signals may include at least B4, B66, B1, B25, B3, B39, B30, B7, B40, B41, B8, B26, B20, B28A, B28B, B12, B17, and the like.

The switch module 50 is connected to the first antenna port ANT1, the second antenna port ANT2, and the low frequency antenna port LB ANT, respectively. A plurality of first ends of the combiner module 60 are respectively connected to the four round ports SRS1, SRS2, SRS3, LB ANT, and the switch module 50 in a one-to-one correspondence, and four second ends of the combiner module 60 are respectively connected to the first antenna ANT0, the second antenna ANT1, the third antenna ANT2, and the fourth antenna ANT3 in a one-to-one correspondence.

In one embodiment, the switch module 50 includes: seventh and eighth switching units 510 and 520, and the combiner module 60 includes a first combiner 610, a second combiner 620, a third combiner 630, and a fourth combiner 640. Two first ends of the seventh switch unit 510 are respectively connected to the first antenna port ANT1 and the second antenna port ANT2 in a one-to-one correspondence manner; a first end of the first combiner 610 is connected to a round emission port LB ANT, another first end of the first combiner 610 is connected to a second end of the seventh switching unit 510, and the second end of the first combiner 610 is connected to the first antenna ANT 0; a first end of the second combiner 620 is connected to the other round antenna port SRS1 and the low frequency antenna port LB ANT through the eighth switch unit 520, respectively, another first end of the second combiner 620 is connected to the medium and high frequency antenna port MHB ANT, and a second end of the second combiner 620 is connected to the second antenna ANT 1; a first end of the third hybrid 630 is connected with a further round transmitting port SRS2, another first end of the third hybrid 630 is connected with another second end of the seventh switching unit 510, and a second end of the third hybrid 630 is connected with a third antenna ANT 2; a first end of the fourth combiner 640 is connected to the second round port SRS3, another first end of the fourth combiner 640 is connected to yet another second end of the seventh switching unit 510, and a second end of the fourth combiner 640 is connected to the fourth antenna ANT 3; a second end of the seventh switch unit 510 is connected to the middle-high frequency transceiving port MHB TRX 1.

The radio frequency transceiving system can be used for supporting the 1T4R function of the channel sounding reference signal of the low-frequency band signal in the non-independent networking mode. And the non-independent networking mode system is any one of EN-DC, NE-DC and NGEN-DC frameworks. Under an EN-DC framework, the electronic equipment is connected with a 4G core network, a 4G base station is a main station, and a 5G base station is an auxiliary station; under an NE-DC framework, a 5G core network is introduced, a 5G base station is a main station, and a 4G base station is an auxiliary station; under the NGEN-DC framework, a 5G core network is introduced, a 4G base station is a main station, and a 5G base station is an auxiliary station. Wherein DC represents Dual Connectivity, i.e., Dual Connectivity (DC); e represents Evolved-UMTS Terrestrial Radio Access (E-UTRA or EUTRA), namely a 4G Radio Access network; n represents (new radio, NR), i.e., 5G new radio; NG stands for (next generation, NG) next generation core network, i.e. 5G core network. EN-DC refers to dual connectivity of a 4G radio access network with a 5G NR, NE-DC refers to dual connectivity of a 5G NR with a 4G radio access network, and NGEN-DC refers to dual connectivity of a 4G radio access network with a 5G NR under a 5G core network.

For convenience of explanation, the following non-independent networking mode is described by taking an EN-DC architecture as an example.

Under an EN-DC framework, the radio frequency transceiving system of the embodiment of the application supports a low-frequency 5G NR NSA system. As shown in table 2:

TABLE 2 Low frequency 5G NR NSA format

	N5	N8	N20	N28A	N28B
						B12	L+L	L+L	L+L	L+L	L+L
B1	M+L	M+L	M+L	M+L	M+L

The 5G NR NSA system is divided into two systems, LB (Low Band lte) + LB (Low Band NR), and mb (middle Band lte) + LB NSA (Low Band NR). In the table, L and M represent a Low Band (Low Band) and a mid Band (Middle Band), respectively.

For convenience, in the embodiment of the present application, B1+ N8 is used to describe an operation principle that the radio frequency transceiving system supports the low frequency 5G NR NSA system. The LTE B1 is used as an anchor point of the 5G to establish a signaling connection first, and the working principle of the B1 is as follows:

transmit path of B1:

the radio frequency transceiver → the 4G MB RFIN port of the middle and high frequency L-PA Mid device 30 → MB 4G PA → SP5T switch → B1 TX Path → Filter (Filter) → DP7T switch → the first antenna ANT0 port ANT1 → Path1 → the eighth switch unit 520 → Path4 → MHB TRX1 port of LMHB DRX → SP7T switch → MHB ANT port of lmdrx hb → Path7 → the second combiner 620 → the second antenna ANT 1.

Receive path of B1:

the second antenna ANT1 → the second combiner 620 → the Path7 → the MHB ANT port of the LMHB DRX → the SP7T switch → the MHB TRX1 port of the LMHB DRX → Path4 → the eighth switch unit 520 → Path1 → the first antenna ANT0 port ANT1 → the DP7T switch → the Filter (Filter) → B1 RX Path → SP3T #3 switch → the low noise amplifier 121(LNA4) → 4P4T #2 switch → the radio transceiver.

Transmit path of N8:

the radio frequency transceiver → the first low frequency transmission port 4G LB RFIN of the radio frequency L PA Mid device → the first power amplifier 111 → the third switching unit 112 → N8 TX Path → the first filtering unit 113 → the switching circuit 130 → the wheel port LB ANT → Path11 → the first combiner 610 → the first antenna ANT 0.

Receive path of N8:

the first antenna ANT0 → the first combiner 610 → the Path11 → the round port LB ANT → the switch circuit 130 → the N8 RX Path → the second filter unit 123 → the first radio frequency switch 1221 → the first low noise amplifier 1211 → the fifth switch unit 124 → the sixth switch unit 126 → the reception port → the radio frequency transceiver.

Further, the SRS operating path of N8 in NSA format is as follows:

the radio frequency transceiver → the first low frequency transmission port 4G LB RFIN of the radio frequency L PA Mid device → the first power amplifier 111 → the third switching unit 112 → N8 TX Path → the first filtering unit 113 → the switching circuit 130 → the wheel port LB ANT → Path11 → the first combiner 610 → the first antenna ANT0, implementing the SRS function; the switch circuit 130 → the round port SRS1 → the Path12 → the second combiner 620 → the second antenna ANT1, so as to realize the SRS function; the switch circuit 130 → the round port SRS2 → the Path13 → the third combiner 630 → the third antenna ANT2, so as to realize the SRS function; the switch circuit 130 → the round port SRS3 → the Path14 → the fourth hybrid 640 → the fourth antenna ANT3, and realizes the SRS function. Specifically, the SRS path in the NSA system is shown in table 3.

Table 3 SRS detailed path configuration table of NSA system

	N5/N8/N20/N28A/N28B
		Channel0	Path11
Channel1	Path12
		Channel2	Path13
Channel3	Path14

In table 3, Channel0, Channel1, Channel2, and Channel3 are transmission path paths of antennas which transmit by turns, respectively.

Based on the radio frequency transceiving system shown in fig. 13 and 14, by optimizing the internal structure of the radio frequency L-PA Mid device 10, configuring four round-fire ports in the device and designing the switch circuit 130 in the device, it is possible to avoid that the radio frequency transceiving system can implement the 1T4R SRS function of a low-frequency band signal by using an external switch, so that the radio frequency transceiving system can support a low-frequency 5G NR NSA system, and can save the occupied area of the PCB board occupied by the devices in the radio frequency transceiving system (for example, the PCB area of about 13mm ^2 can be saved), which is beneficial to the miniaturization of the PCB board, and meanwhile, the radio frequency L-PA Mid device 10 can independently control each switch in the switch circuit 130, and does not affect other radio frequency devices in the radio frequency transceiving system, and can also reduce the cost. In addition, the radio frequency system can also realize the 1T4R SRS function of medium-high frequency signals.

Meanwhile, the switch circuit 130 in the radio frequency transceiving system as illustrated in fig. 14 is a multi-channel selection switch 133 (e.g., a 4P9T switch), and the switch circuit 130 in the radio frequency transceiving system as illustrated in fig. 13 includes a first switch unit 131(SP9T switch) and a second switch unit 132(SP4T switch). The multi-channel selection switch 133 is formed by integrating the first switch unit 131(SP9T switch) into the second switch unit 132(SP4T switch). Therefore, the multi-channel selection switch 133 saves the first-stage switch (SP4T switch) with respect to the first switch unit 131 and the second switch unit 132, not only reducing the occupied space inside the device, but also saving link insertion loss. The insertion loss values of the DP4T switch are shown in table 4, and it can be seen that the insertion loss of the SP4T switch in the N41 band is as high as 0.5 dB.

TABLE 4 SP4T switch insertion loss

Frequency (MHz)	698～960	1700～2200	2300～2700
				Insertion loss (dB)	0.25	0.3	0.35

Analysis table 4 shows that the link loss of the low-frequency 5G NR scheme is improved by 0.25dB, and the sensitivity of the receiving link can be improved by 0.25 dB.

As shown in fig. 15 and 16, in one embodiment, the radio frequency system further includes: a first MIMO receiving module 70, a second MIMO receiving module 80, a ninth switching unit 910, and a tenth switching unit 920. The first MIMO receiving module 70 is configured to support a main set receiving and amplifying process for a plurality of intermediate frequency signals and a plurality of high frequency signals. The second MIMO receiving module 80 is configured to support diversity receiving and amplifying processing on a plurality of intermediate frequency signals and a plurality of high frequency signals. A ninth switching unit 910, wherein a first end of the ninth switching unit 910 is connected to the other second end of the seventh switching unit 510, the other first end of the ninth switching unit 910 is connected to the first MIMO receiving module 70, and a second end of the ninth switching unit 910 is connected to the other first end of the third combiner 630; a tenth switch unit 920, a first end of the tenth switch unit 920 is connected to the second end of the seventh switch unit 510, another first end of the tenth switch unit 920 is connected to the second MIMO receiving module 80, and a second end of the tenth switch unit 920 is connected to another first end of the fourth combiner 640.

As shown in fig. 15 and 16, the radio frequency transceiving system can support SRS functions under NSA standards of N5, N8, N20, N28A, and N28B bands, and can also support 4 × 4MIMO functions of a plurality of medium-high frequency signals, thereby expanding the communication band of the radio frequency system and improving the communication performance of the radio frequency system.

An embodiment of the present application further provides a communication device, where the communication device is provided with the radio frequency transceiving system in any one of the above embodiments, and by providing the radio frequency transceiving system on the communication device, the cost may be reduced, the integration of devices may be improved, the area of a substrate occupied by each device in the radio frequency system may be reduced, the SRS function in the NSA standard of N5, N8, N20, N28A, and N28B frequency bands may also be supported, the 4 × 4MIMO function of a plurality of medium-high frequency signals may also be supported, the communication frequency band of the radio frequency system is expanded, and the communication performance of the radio frequency system is improved.

The above examples only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (15)

1. A radio frequency L-PA Mid device configured with a first low frequency transmit port and at least one receive port for connection to a radio frequency transceiver and four round-robin ports for connection to antennas, the radio frequency L-PA Mid device comprising:

a transmitting circuit connected with the first low-frequency transmitting port and used for amplifying at least three low-frequency-band signals received by the first low-frequency transmitting port,

the receiving circuit is respectively connected with the plurality of receiving ports and is used for amplifying the plurality of low-frequency-band signals received by the wheel transmitting port and outputting the signals through the receiving ports;

the switch circuit is respectively and correspondingly connected with the transmitting circuit, the receiving circuit and the four round emitting ports and is used for selectively conducting radio frequency paths between the transmitting circuit and the receiving circuit and any round emitting port so as to support alternate emission of any low-frequency band signal among the four round emitting ports; wherein the transmit circuit comprises:

the input end of the first power amplifier is connected with the first low-frequency transmitting port;

a third switching unit, a first end of the third switching unit being connected to an output end of the first power amplifier;

the input end of each first filtering unit is correspondingly connected with a second end of the third switching unit, the output end of each first filtering unit is correspondingly connected with the switching circuit and used for filtering the received low-frequency band signals, and the frequency bands of the low-frequency band signals output by the first filtering units are different; the first power amplifier is configured to perform power amplification processing on the low-frequency band signals received through the first low-frequency transmitting port, and transmit the processed low-frequency band signals to each of the first filtering units through the third switching unit.

2. The radio frequency L-PA Mid device of claim 1, the switch circuit comprising a multi-channel selection switch, wherein a plurality of first terminals of the multi-channel selection switch are respectively connected to the transmitter circuit and the receiver circuit; and four second ends of the multi-channel selection switch are respectively connected with the four wheel emitting ports in a one-to-one correspondence manner.

3. The radio frequency L-PA Mid device of claim 1, the switching circuit comprising:

the first switch unit comprises a plurality of first ends and a second end, and the plurality of first ends of the first switch unit are respectively connected with the transmitting circuit and the receiving circuit correspondingly;

a second switching unit including a first terminal and four second terminals; the first end of the second switch unit is connected with the second end of the first switch unit, and the four second ends of the second switch unit are respectively connected with the four wheel emitting ports in a one-to-one correspondence mode.

4. The radio frequency L-PA Mid device of any of claims 1-3, the receive circuit comprising:

the output end of each low noise amplifier is correspondingly connected with one receiving port;

at least one first end of the fourth switching unit is correspondingly connected with the output end of at least one low noise amplifier one by one;

the input end of each second filtering unit is correspondingly connected with the switch circuit, the output end of each second filtering unit is correspondingly connected with a second end of the fourth switch unit, the second filtering units are used for filtering the received low-frequency band signals, and the frequency bands of the low-frequency band signals output by the second filtering units are different.

5. The radio frequency L-PA Mid device of claim 4, the number of the receiving ports being three, the number of the low noise amplifiers being two, denoted as a first low noise amplifier and a second low noise amplifier, respectively, the receiving circuit further comprising an attenuator and a fifth switching unit, wherein,

the output end of the first low noise amplifier is connected with the first end of the fifth switching unit, a second end of the fifth switching unit is connected with one receiving port, and the other second end of the fifth switching unit is connected with the other receiving port through the attenuator; and the output end of the first low noise amplifier is connected with the receiving port.

6. The radio frequency L-PA Mid device of claim 5, the receive circuit further comprising:

and three first ends of the sixth switch unit are respectively connected with the three receiving ports in a one-to-one correspondence manner, and three second ends of the sixth switch unit are respectively connected with the output end of the first low-noise amplifier, the attenuator and the output end of the first low-noise amplifier in a one-to-one correspondence manner.

7. The radio frequency L-PA Mid device of claim 1, further configured with a second low frequency transmit port, a high frequency transmit port, and a high frequency output port, the radio frequency L-PA Mid device further comprising:

the input end of the second power amplifier is connected with the second low-frequency transmitting port, and the output end of the second power amplifier is connected with a first end of the switch circuit and used for amplifying the received 2G low-frequency signal; the low-frequency signals are 4G signals and 5G signals;

and the input end of the third power amplifier is connected with the high-frequency transmitting port, and the output end of the second power amplifier is connected with the high-frequency output port and used for amplifying the received 2G high-frequency signal.

8. The radio frequency L-PA Mid device of claim 1, further configured with a plurality of auxiliary transmit ports, a plurality of auxiliary transceiver ports, and a plurality of auxiliary receive ports for connection with external switching circuitry, wherein a plurality of auxiliary transmit ports are respectively connected with the transmit circuitry, a plurality of the auxiliary transceiver ports are connected with the switching circuitry; a plurality of auxiliary receive ports are connected to the receive circuit.

9. The radio frequency L-PA Mid device according to claim 1, further configured with a coupled output port, the radio frequency L-PA Mid device further comprising:

and the coupling circuit is arranged in a radio frequency path between the switch circuit and the wheel transmitting port and is used for coupling the low-frequency band signal in the radio frequency path so as to output a coupled signal through the coupling output port.

10. The radio frequency L-PA Mid device of claim 1, a frequency band of the low frequency band signal comprising at least: b8, B12, B20, B26, N8, N5, N20, B28A, N28A, B28B, B13, and B29 bands.

11. A radio frequency transceiver system, comprising: the radio frequency L-PA Mid device according to any one of claims 1 to 10, wherein the first antenna, the second antenna, the third antenna, the fourth antenna, the radio frequency transceiver, and the radio frequency L-PA Mid device are respectively connected to four round radio ports of the radio frequency L-PA Mid device in a one-to-one correspondence; the radio frequency transceiver is respectively connected with a transmitting port and a receiving port of the radio frequency L-PA Mid device to support alternate transmission of any low-frequency band signal among the first antenna, the second antenna, the third antenna and the fourth antenna.

12. The radio frequency transceiver system of claim 11, further comprising:

the device comprises a medium-high frequency L-PA Mid device, a first antenna port and a second antenna port, a first receiving and transmitting amplifier and a second receiving and transmitting amplifier, wherein the medium-high frequency L-PA Mid device is configured with the first antenna port and the second antenna port and is used for supporting receiving, transmitting and amplifying a plurality of medium-frequency signals and a plurality of high-frequency signals;

the low, medium and high frequency diversity device is configured with a low frequency antenna port, a medium and high frequency antenna port and a medium and high frequency transceiving port and is used for supporting diversity receiving and amplifying processing of a plurality of low frequency band signals, a plurality of medium frequency signals and a plurality of high frequency signals;

the switch module is respectively connected with the first antenna port, the second antenna port and the low-frequency antenna port;

a plurality of first ends of the combiner module are respectively connected with the four wheel emitting ports and the switch module in a one-to-one correspondence manner, and four second ends of the combiner module are respectively connected with the first antenna, the second antenna, the third antenna and the fourth antenna in a one-to-one correspondence manner;

the radio frequency transceiving system is used for supporting the 1T4R function of the channel sounding reference signal of the low-frequency band signal in the non-independent networking mode.

13. The radio frequency transceiver system of claim 12, wherein the switch module comprises: a seventh switch unit and an eighth switch unit, the combiner module comprises a first combiner, a second combiner, a third combiner and a fourth combiner, wherein,

two first ends of the seventh switch unit are respectively connected with the first antenna port and the second antenna port in a one-to-one correspondence manner;

a first end of the first combiner is connected with a round-robin port, another first end of the first combiner is connected with a second end of the seventh switch unit, and the second end of the first combiner is connected with the first antenna;

a first end of the second combiner is connected with the other round-robin port and the low-frequency antenna port through the eighth switching unit respectively, another first end of the second combiner is connected with the medium-high frequency antenna port, and a second end of the second combiner is connected with the second antenna;

a first end of the third combiner is connected with a third round transmitting port, the other first end of the third combiner is connected with the other second end of the seventh switching unit, and the second end of the third combiner is connected with a third antenna;

a first end of the fourth combiner is connected to a second round-trip port, another first end of the fourth combiner is connected to a second end of the seventh switching unit, and a second end of the fourth combiner is connected to the fourth antenna;

and a second end of the seventh switch unit is connected with the medium-high frequency transceiving port.

14. The radio frequency transceiver system of claim 13, further comprising:

the first MIMO receiving module is used for supporting the receiving and amplifying processing of a main set of a plurality of intermediate frequency signals and a plurality of high frequency signals;

the second MIMO receiving module is used for supporting diversity receiving and amplifying processing of a plurality of intermediate frequency signals and a plurality of high frequency signals;

a ninth switch unit, a first end of which is connected to another second end of the seventh switch unit, another first end of which is connected to the first MIMO receiving module, and a second end of which is connected to another first end of the third combiner;

a tenth switching unit, a first end of the tenth switching unit is connected to a second end of the seventh switching unit, another first end of the tenth switching unit is connected to the second MIMO receiving module, and a second end of the tenth switching unit is connected to another first end of the fourth combiner.

15. A communication device comprising a radio frequency transceiver system as claimed in any one of claims 11-14.

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