CN114337694B

CN114337694B - Radio frequency L-PA Mid device, radio frequency receiving and transmitting system and communication equipment

Info

Publication number: CN114337694B
Application number: CN202011032899.7A
Authority: CN
Inventors: 冯斌
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2020-09-27
Filing date: 2020-09-27
Publication date: 2023-08-11
Anticipated expiration: 2040-09-27
Also published as: CN114337694A

Abstract

The application provides a radio frequency L-PA Mid device, a radio frequency receiving and transmitting system and communication equipment, wherein the radio frequency L-PA Mid device is configured with a high frequency transmitting port, an intermediate frequency transmitting port, a plurality of receiving ports and a plurality of antenna ports, and the radio frequency L-PA Mid device comprises: the device comprises a transmitting module, a first switch unit, a first receiving circuit, a second receiving circuit and a first control unit, wherein the transmitting module is used for amplifying a plurality of received intermediate frequency signals and a plurality of received high frequency signals; the first ends of the first switch units are respectively connected with the transmitting module correspondingly, and the second ends of the first switch units are respectively connected with the antenna ports correspondingly one by one; the first receiving circuit comprises at least one first low noise amplifier, the second receiving circuit comprises at least one second low noise amplifier, and the first control unit is used for adjusting gain coefficients of the low noise amplifiers so as to reduce cascade noise coefficients of an intermediate frequency signal receiving path and cascade noise coefficients of a high frequency signal receiving path and further improve sensitivity of the device.

Description

Radio frequency L-PA Mid device, radio frequency receiving and transmitting 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 transceiver system, and a communication device.

Background

With the development and progress of technology, in order to cope with the increasing demands of various network systems and to solve the problem of PCB layout shortage, the high integration and miniaturization of devices are apparently a trend. From a Phase2 product which only supports single frequency band at first to a Phase7 product which supports integration of various systems, the integration level of the device is higher and higher, and meanwhile, the packaging size of the device is also smaller and smaller. The middle and high frequency power amplifier modules with built-in low noise amplifier are defined in the 2G, 3G or 4G architecture design, but when the modules are applied to the radio frequency transceiver system for receiving middle and high frequency signals, the sensitivity of a receiving path in the radio frequency transceiver system is lower.

Disclosure of Invention

The embodiment of the application provides a radio frequency L-PA Mid device, a radio frequency receiving and transmitting system and communication equipment, which can improve the sensitivity of the radio frequency L-PA Mid device.

A radio frequency L-PA Mid device configured with a high frequency transmit port, an intermediate frequency transmit port, and a plurality of receive ports for connecting a radio frequency transceiver, and a plurality of antenna ports for connecting an antenna, the radio frequency L-PA Mid device comprising:

The transmitting module is respectively connected with the intermediate frequency transmitting port and the high frequency transmitting port and is used for receiving a plurality of intermediate frequency signals and a plurality of high frequency signals and amplifying the received intermediate frequency signals and the received high frequency signals;

the first switch unit is characterized in that a plurality of first ends of the first switch unit are respectively and correspondingly connected with the first transmitting module, and a plurality of second ends of the first switch unit are respectively and correspondingly connected with a plurality of antenna ports;

the first receiving circuit comprises at least one first low-noise amplifier, the input end of the first low-noise amplifier is connected with the first end of the first switch unit, and the output end of the first low-noise amplifier is connected with the receiving port and is used for amplifying a plurality of received intermediate frequency signals;

the second receiving circuit comprises at least one second low-noise amplifier, the input end of the second low-noise amplifier is connected with the first end of the first switch unit, and the output end of the first low-noise amplifier is connected with the receiving port and is used for amplifying a plurality of received high-frequency signals;

and the first control unit is respectively connected with each low-noise amplifier and used for adjusting the gain coefficient of each low-noise amplifier so as to reduce the cascade noise coefficient of the intermediate frequency signal receiving path and the cascade noise coefficient of the high-frequency signal receiving path.

A radio frequency transceiver system comprising:

as with the rf L-PA Mid device described above,

the first antenna is connected with the antenna port and is used for receiving and transmitting the intermediate frequency signals;

the second antenna is connected with the other antenna port and is used for receiving and transmitting the high-frequency signals;

and the radio frequency transceiver is respectively connected with the transmitting port and the receiving port of the radio frequency L-LNA device.

A communication device comprises the radio frequency transceiver system.

The radio frequency L-PA Mid device, the radio frequency receiving and transmitting system and the communication equipment integrate the first receiving circuit, the second receiving circuit, the transmitting module, the first switching unit and the first control unit, so that the receiving and transmitting control of a plurality of intermediate frequency signals and high frequency signals can be realized, the situation that corresponding switching circuits are externally arranged on the traditional radio frequency L-PA Mid device to realize the receiving of the intermediate frequency signals and the high frequency signals can be avoided, the integration level of the radio frequency L-PA Mid device is improved, meanwhile, the link loss on a receiving channel can be reduced by omitting the external switching circuit, and the gain coefficient of each first low noise amplifier and each second low noise amplifier can be regulated, so that the cascade noise coefficient of any intermediate frequency signal receiving channel and any high frequency signal receiving channel can be reduced, and the sensitivity of the radio frequency L-PA Mid device can be improved.

Drawings

In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is one of the block diagrams of the structure of a radio frequency L-PA Mid device in one embodiment;

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

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

FIG. 4a is a block diagram of a radio frequency L-PA Mid device in one embodiment;

FIG. 4b is a fifth block diagram of the structure of a radio frequency L-PA Mid device in one embodiment;

FIG. 5 is a block diagram of a radio frequency L-PA Mid device in one embodiment;

FIG. 6 is a block diagram of a radio frequency L-PA Mid device in one embodiment;

FIG. 7 is a block diagram of a radio frequency L-PA Mid device in one embodiment;

FIG. 8a is a schematic diagram of a pin of the RF L-PA Mid device of FIG. 6;

FIG. 8b is a schematic diagram of a package structure of the RF L-PA Mid device of FIG. 6;

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

FIG. 9b is a schematic diagram of a package structure of the RF L-PA Mid device of FIG. 7;

FIG. 10 is a block diagram of an RF transceiver system in one embodiment;

fig. 11 is a block diagram of a radio frequency transceiver system according to another embodiment.

Detailed Description

In order that the above objects, features and advantages of the application will be readily understood, a more particular description of the application will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, and the preferred embodiments of the present application are presented 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. The present application may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the application, so that the application is not limited to the specific embodiments disclosed below.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise. In the description of the present application, the meaning of "several" means at least one, such as one, two, etc., unless specifically defined 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 devices connected to a wireless modem, and various types of User Equipment (UE) (e.g., a Mobile Station, MS), and so on. For convenience of description, the above-mentioned devices are collectively referred to as communication devices. The network devices may include base stations, access points, and the like.

As shown in fig. 1, an embodiment of the present application provides a radio frequency L-PA Mid device. The radio frequency L-PA Mid device can be understood as a power amplifier module (Power Amplifier Modules including Duplexers With LNA, L-PA Mid) with a built-in low noise amplifier. The radio frequency L-PA Mid device can support the receiving and transmitting of intermediate frequency signals and high frequency signals of a plurality of different frequency bands, realize the receiving switching control and transmitting switching control among a plurality of intermediate frequency signals and the switching control among transmitting and receiving, and realize the receiving switching control and transmitting switching control among a plurality of high frequency signals and the switching control among transmitting and receiving. The plurality of medium and high frequency signals may include medium and high frequency signals of different frequency bands among a 2G signal, a 3G signal, and a 4G signal. In particular, the plurality of frequency bands of the intermediate frequency signal may include at least two or any combination of B1, B3, B25, B34, B66 and B39, including at least one overseas frequency band of B25, B4, B66. The plurality of frequency bands of the high frequency signal may include at least two or any combination of B30, B7, B40, and B41, including at least the overseas frequency band of B30. Therefore, the radio frequency L-PA Mid device in the embodiment of the present application may also be referred to as a middle-high frequency power amplifier module (Middle and High Band PA Mid With LNA, MHB L-PA Mid) with a built-in low noise amplifier.

In one embodiment, the radio frequency L-PA Mid device may be understood as a package structure, the radio frequency L-PA Mid device being configured with a high frequency transmit port 4G HB RFIN, an intermediate frequency transmit port 4G MB RFIN and a plurality of receive ports LNA OUT (LNA OUT1, LNA OUT2, LNA OUT 3) for connecting a radio frequency transceiver and a plurality of antenna ports LNA1, LNA2 for connecting an antenna. The receiving port LNA OUT, the high-frequency transmitting port 4G HB RFIN, the intermediate-frequency transmitting port 4G MB RFIN and the antenna port LNA1, LNA2 which are configured in the device can be understood as radio frequency pin terminals of a radio frequency L-PA Mid device for connection with various external devices. Specifically, the receiving port LNA OUT, the high frequency transmitting port 4G HB RFIN, and the intermediate frequency transmitting port 4G MB RFIN may be used to connect with a radio frequency transceiver. Antenna port LNA1, LNA2 may be used in connection with an antenna. The antenna ports in the embodiment of the application at least comprise two antenna ports, including at least a first antenna port LNA1 and a second antenna port LNA2.

The intermediate frequency transmitting port 4G MB RFIN is for receiving a plurality of intermediate frequency signals sent by the radio frequency transceiver, and the radio frequency L-PA Mid device may perform filtering amplification processing on the input plurality of intermediate frequency signals, so as to output the plurality of intermediate frequency signals to the antenna interface, and transmit the plurality of intermediate frequency signals through an antenna connected to the first antenna port LNA1, so as to implement transmission control of the plurality of intermediate frequency signals. The high-frequency transmitting port 4G HB RFIN is used for receiving a plurality of high-frequency signals sent by the radio-frequency transceiver, the radio-frequency L-PA Mid device can carry out filtering amplification processing on the plurality of input high-frequency signals so as to output the signals to the antenna interface, and the signals are transmitted by an antenna connected with the second antenna port LNA2 so as to realize the transmission control of the plurality of high-frequency signals. The first antenna port LNA1 is used for receiving a plurality of intermediate frequency signals received by an antenna, the second antenna port LNA2 is used for receiving a plurality of high frequency signals received by the antenna, the radio frequency L-PA Mid device can process, filter and amplify the input plurality of intermediate and high frequency signals so as to output the signals to a corresponding receiving port LNA OUT, and the signals are output to a radio frequency transceiver through the receiving port LNA OUT so as to realize the receiving control of the plurality of intermediate and high frequency signals.

Specifically, the radio frequency L-PA Mid device comprises: the first control unit 150 includes a transmitting module 110, a first switching unit 120, a first receiving circuit 130, a second receiving circuit 140, and a first control unit.

The transmitting module 110 includes two inputs and a plurality of outputs. One input end of the transmitting module 110 is connected with the intermediate frequency transmitting port 4G MB RFIN, and the other input end of the transmitting module 110 is connected with the high frequency transmitting port 4G HB RFIN. The plurality of output terminals of the transmitting module 110 are connected to the plurality of first terminals of the first switching unit 120 in a one-to-one correspondence. The intermediate frequency transmit port 4G MB RFIN, the transmit module 110, the first switch unit 120, and the first antenna port LNA1 may form a plurality of first transmit paths. That is, the transmitting module 110 receives a plurality of intermediate frequency signals through the intermediate frequency transmitting port 4G MB RFIN, amplifies and filters the received intermediate frequency signals, and selects any intermediate frequency signal from the plurality of intermediate frequency signals after the filtering and amplifying processes through the first switch unit 120 to output to the first antenna port LNA1, so as to realize the switching and transmitting control of the plurality of intermediate frequency signals. Accordingly, the high frequency transmit port 4G HB RFIN, the transmit module 110, the first switch unit 120, and the second antenna port LNA2 may constitute a plurality of second transmit paths. That is, the transmitting module 110 receives a plurality of high frequency signals through the high frequency transmitting port 4G HB RFIN, amplifies and filters the received high frequency signals, and selects any one high frequency signal from the plurality of high frequency signals after the filtering and amplifying processes through the first switch unit 120 to output to the second antenna port LNA2, so as to realize the switching transmission control of the plurality of high frequency signals.

The first receiving circuit 130 includes at least one first low noise amplifier 131, an input terminal of the first low noise amplifier 131 is connected to the first terminal of the first switch unit 120, and an output terminal of the first low noise amplifier 131 is connected to the receiving port LNA OUT. The first antenna port LNA1, the first switch unit 120, the first receiving circuit 130, and the corresponding receiving port LNA OUT may form a first receiving path. The radio frequency L-PA Mid device can realize receiving control of a plurality of intermediate frequency signals based on the constructed first receiving path.

The second receiving circuit 140 includes at least one second low noise amplifier 141, an input end of the second low noise amplifier 141 is connected to the transmitting module 110 and the first end of the first switch unit 120, and an output end of the second low noise amplifier 141 is connected to the receiving port LNA OUT. The second antenna port LNA2, the first switch unit 120, the transmitting module 110, the second receiving circuit 140, and the corresponding receiving port LNA OUT may form a second receiving path. The radio frequency L-PA Mid device can realize the receiving control of a plurality of high frequency signals based on the constructed second receiving path.

The first ends of the first switch unit 120 are correspondingly connected with the transmitting module 110, the first transmitting circuit and the second transmitting circuit respectively, and the second ends of the first switch unit 120 are correspondingly connected with the antenna ports LNA1 and LNA2 respectively one by one; the first switching unit 120 can selectively turn on either a transmission path or a reception path of an intermediate frequency signal, or can turn on either a transmission path or a reception path of a high frequency signal. For example, when the rf L-PA Mid device is in the transmitting mode, the first switch unit 120 may be controlled to selectively switch on the first transmitting path and thus switch on the transmitting path of any intermediate frequency signal, and at the same time, the first switch unit 120 may be controlled to selectively switch on the second transmitting path and thus switch on the transmitting path of any high frequency signal. When the rf L-PA Mid device is in the receiving mode, the first switch unit 120 may be controlled to selectively switch on the path between the first receiving circuit 130 and the antenna ports LNA1 and LNA2 to switch on the receiving path of any intermediate frequency signal, and at the same time, the first switch unit 120 may be controlled to selectively switch on the path between the second receiving circuit 140 and the antenna ports LNA1 and LNA2 to switch on the receiving path of any high frequency signal.

The first control unit 150 is connected to each of the first low noise amplifier 131 and each of the second low noise amplifier 141, and is configured to adjust gain coefficients of each of the first low noise amplifier 131 and each of the second low noise amplifier 141 so as to reduce a cascade noise coefficient of the intermediate frequency signal receiving path and a cascade noise coefficient of the high frequency signal receiving path. In particular, the first control unit 150 may be a mobile industry processor interface (Mobile Industry Processor Interface, MIPI) -radio frequency front end control interface (RF Front End Control Interface, RFFE) control unit. When the first control unit 150 is a MIPI-RFFE control unit, its radio frequency L-PA Mid device is also configured with an input pin CLK for a clock signal, an input or bi-directional pin sdathas for a single/bi-directional data signal, a power supply pin VDD, a reference voltage pin VIO, and so on.

The intermediate frequency signal receiving path of the radio frequency L-PA Mid device is formed by a plurality of cascaded devices such as a first antenna port LNA1, a first switch unit 120, a first low noise amplifier 131 of a first receiving circuit 130, a receiving port LNA OUT, and the like; the high-frequency signal receiving path of the radio frequency L-PA Mid device is formed by a plurality of cascaded devices such as a second antenna port LNA2, a first switch unit 120, a second low noise amplifier 141 of the second receiving circuit 140, a receiving port LNA OUT, and the like. The calculation formula of the cascade noise coefficient is shown in formula 1:

Nf=n1+ (N2-1)/g1+ (N3-1)/g1×g2+ (N4-1)/g1×g2×g3+ … (formula 1)

Wherein N1 to N4 represent noise coefficients of the first stage to the fourth stage, and G1 to G3 represent gains of the first stage to the third stage, respectively, and a final cascade noise coefficient of the entire receiving path can be calculated by the formula (1). The noise figure of the low noise amplifier can be changed by adjusting the gain factor of the low noise amplifier in the receive path, which in turn can change the cascade noise figure.

Sensitivity is the minimum input signal level that a communication device can receive when meeting certain Bit Error Rate (BER) performance. The communication protocol 3GPP provides that when the sensitivity index is tested, the required bit error rate must be lower than 5%, namely the Throughput is higher than 95%; under the above conditions, the measured minimum input level signal is the sensitivity of the communication device. The sensitivity can be calculated by a theoretical formula, specifically as shown in formula (2):

sensor= -174+10lgbw+nf (formula 2)

BW refers to the bandwidth of the working frequency band of the communication equipment, and the unit is Hz; NF refers to the cascading noise figure of the communication device in dB. The sensitivity of the communication device can be correspondingly improved by reducing the cascading noise figure.

In one embodiment, the first low noise amplifier 131 and the second low noise amplifier 141 are gain adjustable amplifying devices. The first control unit 150 may be configured to adjust the gain factor of the first low noise amplifier 131, thereby adjusting the cascade noise factor of the intermediate frequency signal receiving path, and at the same time, the first control unit 150 may be configured to adjust the gain factor of the second low noise amplifier 141, thereby adjusting the cascade noise factor of the high frequency signal receiving path.

Further, the first control unit 150 may also adjust the gain level of the first low noise amplifier 131 according to the power value of the intermediate frequency signal, and adjust the gain level of the second low noise amplifier 141 according to the power value of the high frequency signal. Illustratively, considering an in-band blocking scenario where a large signal may cause in-band blocking, the gain level of each low noise amplifier may be adjusted to avoid damage to the radio frequency transceiver where the power of the high frequency signal is near or greater than the maximum input power of the radio frequency transceiver.

The above-mentioned rf L-PA Mid device integrates the first receiving circuit 130, the second receiving circuit 140, the transmitting module 110, the first switching unit 120 and the first control unit 150, so as to implement the transceiving control of a plurality of intermediate frequency signals and high frequency signals, avoid the external corresponding switching circuit on the conventional rf L-PA Mid device to implement the receiving of intermediate frequency signals and high frequency signals, improve the integration level of the rf L-PA Mid device, and simultaneously, by omitting the external switching circuit, reduce the link loss on the receiving path and adjust the gain coefficients of the first low noise amplifier 131 and the second low noise amplifier 141, so as to reduce the cascading noise coefficient of any intermediate frequency signal receiving path and high frequency signal receiving path, and further improve the sensitivity of the rf L-PA Mid device.

As shown in fig. 2, in one embodiment, the first receiving circuit 130 further includes a plurality of first filter circuits 133 and second switching units 135. Wherein the number of first low noise amplifiers 131 is one. Each first filter circuit 133 is correspondingly connected to a first end of the first switch unit 120, that is, the first end of the first switch unit 120 may be connected to the input end of the first low noise amplifier 131 through any one of the first filter circuits 133 and the second switch unit 135.

The first filter circuits 133 are configured to filter the received intermediate frequency signals, and the frequency bands of the intermediate frequency signals output by each first filter circuit 133 are different. The first filter circuit 133 may correspondingly include a filter, which only allows the intermediate frequency signal in the preset frequency band to pass through. For example, if the frequency bands of the plurality of intermediate frequency signals may be six different frequency bands of B1, B3, B25, B34, B66, B39, six first filter circuits 133 (i.e., six filters) may be correspondingly disposed to implement the filtering process for the six intermediate frequency signals. After the filtering processing of the six first filtering circuits 133, the six intermediate frequency signals B1, B3, B25, B34, B66, B39 may be output to the second switching unit 135 correspondingly.

In one embodiment, the plurality of first filter circuits 133 may share the same first end of the first switch unit 120. For example, four first filter circuits 133 for four different frequency bands corresponding to the filter processes B1, B3, B25, B66 may be connected to the same first end (e.g., contact 4) of the first switch unit 120, and two first filter circuits 133 for two different frequency bands corresponding to the filter processes B34, B39 may be connected to the same first end (e.g., contact 8) of the first switch unit 120.

In the embodiment of the application, the number of the first filter circuits 133 connected to the same first end of the first switch unit 120 and the frequency band of the intermediate frequency signal used for filtering processing by the connected first filter circuits 133 are not further limited, and may be set according to the frequency band range of each intermediate frequency signal.

In one embodiment, the filter may be a bandpass filter, a lowpass filter, or the like. It should be noted that, in the embodiment of the present application, the type of the filter in each first filter circuit 133 is not limited further, and an appropriate filter may be selected according to the frequency band of the intermediate frequency signal to be filtered.

The second switching unit 135 includes a plurality of first terminals and a second terminal. The first ends of the second switch units 135 are connected to the first filter circuits 133 in a one-to-one correspondence manner, and are used for receiving the intermediate frequency signals after the filtering process, and the second ends of the second switch units 135 are connected to the input ends of the first low noise amplifier 131. The second switch unit 135 is configured to selectively conduct the paths between the second end and the plurality of first ends, so as to simultaneously output an intermediate frequency signal to the first low noise amplifier 131, and then output the intermediate frequency signal to the radio frequency transceiver through any receiving port LNA OUT via the output end of the first low noise amplifier 131, so as to receive any intermediate frequency signal.

For example, when the first filter circuit 133 has six, the second switching unit 135 may be a radio frequency SP6T switch. Six selection terminals (i.e., first terminals) of the radio frequency SP6T switch, one selection terminal is correspondingly connected to one first filter circuit 133, a single terminal (i.e., second terminal) of the radio frequency SP6T switch is connected to the input terminal of the first low noise amplifier 131, and the output terminal of the first low noise amplifier 131 is connected to any one of the receiving ports LNA OUT. The second switch unit 135 can select the six intermediate frequency signals to conduct the path between any one of the first filter circuits 133 and the first low noise amplifier 131, and further conduct the first receiving path of an intermediate frequency signal.

As shown in fig. 3, in one embodiment, the first receiving circuit 130 further includes a plurality of first filter circuits 133 and second switching units 135. Wherein the number of first low noise amplifiers 131 is two; the second switching unit 135 includes a plurality of first terminals and two second terminals, and the plurality of first terminals are connected to the plurality of first filter circuits 133 in a one-to-one correspondence. An input terminal of a first low noise amplifier 131 is connected to a second terminal of the second switching unit 135; an input terminal of the further first low noise amplifier 131 is connected to a further second terminal of the second switching unit 135.

Specifically, the second switching unit 135 includes a first SP3T switch 1351 and a second SP3T switch 1353. Wherein, three selection terminals of the first SP3T switch 1351 and three selection terminals of the second SP3T switch 1353 are the plurality of second terminals of the second switch unit 135, and a single terminal of the first SP3T switch 1351 and a single terminal of the second SP3T switch 1353 are the two second terminals of the second switch unit 135. That is, a single terminal of the first SP3T switch 1351 is connected to an input terminal of a first low noise amplifier 131, and a single terminal of the second SP3T switch 1353 is connected to an input terminal of another first low noise amplifier 131. The plurality of first filter circuits 133 connected to the three selection terminals of the first SP3T switch 1351 may include three filters for filtering the three intermediate frequency signals B39, B3, B25, respectively, and the plurality of first filter circuits 133 connected to the three selection terminals of the second SP3T switch 1353 may include four filters for filtering the four intermediate frequency signals B34, B1, B13, B4, or B66, respectively.

The three filters connected to the first SP3T switch 1351 are adjacent to the frequency band of the three intermediate frequency signals for filtering, and the three filters connected to the second SP3T switch 1353 are adjacent to the frequency band of the three intermediate frequency signals for filtering. In the embodiment of the present application, the three first filter circuits 133 connected to the first SP3T switch 1351 and the three first filter circuits 133 connected to the second SP3T switch 1353 are not further limited, and may be set according to actual requirements.

Alternatively, the second switching unit 135 may also be a DP6T switch. In the embodiment of the present application, the number of the switches included in the second switching unit 135 and the type thereof are not further limited, and may be set according to the set number of the first filter circuits 133 and the first low noise amplifiers 131.

As shown in fig. 2 and 3, in one embodiment, the second receiving circuit 140 further includes a plurality of second filter circuits 143 and a third switching unit 145. Each first filter circuit 133 is correspondingly connected to a first end of the first switch unit 120, that is, the first end of the first switch unit 120 may be connected to the input end of the second low noise amplifier 141 through any one of the second filter circuits 143 and the second switch unit 135.

The second filter circuits 143 are used for filtering the received high-frequency signals, and frequency bands of the high-frequency signals output by the second filter circuits 143 are different. The second filter circuit 143 may include a filter, which allows only the high frequency signal of the preset frequency band to pass. For example, if the frequency bands of the plurality of high-frequency signals may be four different frequency bands of B40, B41, B7, B30, four second filter circuits 143 (i.e., six filters) may be correspondingly disposed to implement the filtering process for the four high-frequency signals. After the filtering processing by the four second filter circuits 143, the four high-frequency signals can be correspondingly output to the second switching unit 135.

In one embodiment, the first filter circuit 133 and the second filter circuit 143 may share the same first terminal of the first switch unit 120. For example, the four first filter circuits 133 for the four different frequency bands corresponding to the filter processes B1, B3, B25, B66 may share the same first end (e.g., contact 4) of the first switch unit 120 with the second filter circuit 143 for the corresponding filter process B40. The other three second filter circuits 143 may be connected to the three first ends of the first switch unit 120 in a one-to-one correspondence.

In the embodiment, the number of the second filter circuits 143 connected to the same first end of the first switch unit 120 and the frequency band of the high-frequency signal used for filtering processing by the connected second filter circuits 143 are not further limited, and may be set according to the frequency band range of each high-frequency signal.

The second switching unit 135 includes a plurality of first terminals and a second terminal. The first ends of the second switch units 135 are connected to the second filter circuits 143 in a one-to-one correspondence manner, and are used for receiving the filtered high-frequency signals, and the second ends of the second switch units 135 are connected to the input ends of the second low-noise amplifier 141. The second switch unit 135 is configured to selectively turn on the paths between the second end and the plurality of first ends to simultaneously output a high-frequency signal to the second low-noise amplifier 141, and then output the high-frequency signal to the radio-frequency transceiver through any receiving port LNA OUT via the output end of the second low-noise amplifier 141, so as to receive any high-frequency signal. The first switching unit 120 may be a radio frequency SP4T switch, or a combination of multiple radio frequency SPDT switches.

It should be noted that, in the embodiment of the present application, the number of the second low noise amplifiers 141 and the number of the second switch units 135 that may be included in the second receiving circuit 140 may be set according to the number of the high frequency signals and the frequency range, for example, two or four second low noise amplifiers 141 may be correspondingly provided.

Based on the radio frequency L-PA Mid device shown in fig. 2 and 3, the cascade noise coefficient of any receiving path can be reduced by performing gain adjustment on each low noise amplifier, so that the sensitivity of the radio frequency L-PA Mid device is improved. Meanwhile, the radio frequency L-PA Mid device can realize the transceiving control of six intermediate frequency signals of B1, B3, B25, B34, B66 and B39, can avoid arranging additional switching circuits outside the radio frequency L-PA Mid device to support the transceiving control of overseas frequency bands, such as B25, B4 and B66, and can realize the transceiving control of four high frequency signals of B40, B41, B7 and B30, can avoid arranging additional switching circuits outside the radio frequency L-PA Mid device to support the transceiving control of overseas frequency bands, such as B30, can improve the integration level of the radio frequency L-PA Mid device and reduce the cost, and simultaneously, because the receiving channels of B25, B4, B66 and B30 are all arranged inside the radio frequency L-PA Mid device, the link loss of the receiving channels of the four medium and high frequency signals of B25, B4, B66 and B30 can be reduced, thereby reducing the cascade noise coefficient, and further can also improve the sensitivity of the radio frequency L-PA Mid device and further can be correspondingly reduced for the radio frequency L-PA Mid device.

As shown in fig. 4a, in one embodiment, the transmit module 110 includes a first power amplifier 111 and a second power amplifier 112. The input end of the first power amplifier 111 is connected to the intermediate frequency transmitting port 4G MB RFIN, and the output end of the first power amplifier 111 is connected to the first end of the first switch unit 120, and is configured to amplify a plurality of received intermediate frequency signals and output the received intermediate frequency signals through the first antenna port LNA1 to implement transmission of the plurality of intermediate frequency signals. The input end of the second power amplifier 112 is connected to the high-frequency transmitting port 4G HB RFIN, and the output end of the second power amplifier 112 is connected to the second receiving circuit 140 and the first end of the first switch unit 120, respectively, for amplifying the received plurality of high-frequency signals, and outputting the signals through the second antenna port ANT2, so as to realize the transmission of the high-frequency signals.

As shown in fig. 4b, in one embodiment, the transmitting module 110 further includes a fourth switching unit 113, a plurality of third filter circuits 114. The intermediate frequency receiving port LNA OUT, the fourth switching unit 113, the plurality of third filter circuits 114, the first switching unit 120, and the first antenna port LNA1 constitute a plurality of first transmission paths.

The first end of the fourth switching unit 113 is connected to the output end of the first power amplifier 111, and each second end of the fourth switching unit 113 is connected to the first switching unit 120 through a third filter circuit 114. Specifically, the fourth switch unit 113 may be a radio frequency SP5T switch, or a radio frequency SP6T switch, or may be a combination of a plurality of radio frequency switches, and in the embodiment of the present application, the specific type of the fourth switch unit 113 is not further limited.

The third filter circuits 114 are configured to perform filtering processing on the intermediate frequency signals, and frequency bands of the intermediate frequency signals output by the third filter circuits 114 are different. It will be appreciated that the filter paths in the first plurality of transmit paths are independent of each other and do not coincide with each other. The third filter circuit 114 may correspondingly include a filter, which only allows the intermediate frequency signal of the preset frequency band to pass. For example, if the frequency bands of the plurality of intermediate frequency signals may be six different frequency bands, such as B1, B3, B25, B34, B66, and B39, six third filter circuits 114 (i.e., six filters) may be correspondingly disposed to implement the filtering process for the six intermediate frequency signals. After the filtering processing of the six third filtering circuits 114, the six intermediate frequency signals B1, B3, B25, B34, B66, and B39 may be output to the first switching unit 120 correspondingly.

The fourth switching unit 113 is exemplified as a radio frequency SP5T switch. The single terminal of the rf SP5T switch is connected to the output of the first power amplifier 111, and each of the second terminals may be correspondingly connected to one third filter circuit 114, or may be correspondingly connected to a plurality of third filter circuits 114. For example, four second terminals of the radio frequency SP5T switch are respectively connected to four filter circuits for processing the four intermediate frequency signals B1, B3, B25, and B6 in a one-to-one correspondence manner, and another second terminal of the radio frequency SP5T switch is respectively connected to two filter circuits for processing the four intermediate frequency signals B34 and B39.

The transmitting module 110 further includes a fifth switching unit 115 and a plurality of fourth filter circuits 116. The high-frequency transmission port 4G HB RFIN, the fifth switching unit 115, the plurality of fourth filter circuits 116, the first switching unit 120, and the second antenna port ANT2 constitute a plurality of second transmission paths.

The fourth filter circuits 116 are configured to perform filtering processing on the high-frequency signals, and the frequency bands of the high-frequency signals output by the fourth filter circuits 116 are different. It will be appreciated that the filter paths in the second plurality of transmit paths are independent of each other and do not coincide with each other. The fourth filter circuit 116 may correspondingly include a filter that allows only high frequency signals of a predetermined frequency band to pass. For example, if the frequency bands of the plurality of high-frequency signals may be four different frequency bands of B40, B41, B7, B30, four fourth filter circuits 116 (i.e., six filters) may be correspondingly disposed to implement the filtering process for the six intermediate-frequency signals. After the filtering processing of the four fourth filtering circuits 116, four high-frequency signals B40, B41, B7, B30 can be correspondingly output to the first switching unit 120.

A first end of the fifth switching unit 115 is connected to the output end of the second power amplifier 112, another first end of the fifth switching unit 115 is connected to the second switching unit 135 in the second receiving circuit 140, and each second end of the fifth switching unit is connected to the first switching unit 120 through a fourth filter circuit 116. Specifically, the fourth switching unit 113 may be a radio frequency 4P4T switch. The rf 4P4T switch includes four first ends and four second ends, wherein a first end of the rf 4P4T switch is connected to the output end of the second power amplifier 112, and the other three first ends of the rf 4P4T switch are connected to the selection end of the second switch unit 135 (e.g., the rf SP 4T) in the second receiving circuit 140. The four second ends of the rf 4P4T switch are respectively connected to the four fourth filter circuits 116 in a one-to-one correspondence.

In one embodiment, the radio frequency L-PA Mid device further includes a sixth switching unit 160, wherein the sixth switching unit 160 includes a plurality of first terminals and a plurality of second terminals. The first ends of the sixth switch unit 160 are connected to the receiving ports LNA OUT in a one-to-one correspondence manner, and the second ends of the sixth switch unit 160 are connected to the output ends of the first low noise amplifier 131 and the second low noise amplifier 141 in a one-to-one correspondence manner.

Based on the radio frequency L-PA Mid device shown in fig. 4B, the transmit-receive control of the B25 signal is explained:

emission control: the intermediate frequency signal enters the radio frequency L-PA Mid device from the intermediate frequency transmitting port 4G MB RFIN, is amplified by the first power amplifier 111, and then is output to a single port of the fourth switch unit 113, and then is filtered by the third filter circuit 114 through a transmitting path from the fourth switch unit 113 to B25, and then, is output to a first end (e.g. contact 1) of the first switch unit 120, and then is output to the first antenna port ANT1 through the first switch unit 120, so as to realize the transmission control of the B25 signal.

And (3) receiving control: the intermediate frequency signal enters the radio frequency L-PA Mid device from the first antenna port ANT1, is switched to the receiving path of B25 by the first switch unit 120, is filtered by the third filter circuit 114, and then outputs the B25 signal to the second switch unit 135 (for example, the first SP3T switch 1351), is switched to the first low noise amplifier 131 by the first SP3T switch 1351, and is further switched to the receiving port LNA OUT by the sixth switch unit 160, so as to realize the receiving control of the B25 signal.

Based on the radio frequency L-PA Mid device as shown in fig. 4B, the transmit and receive control of the B41 signal is explained:

Emission control: the high-frequency signal enters the radio-frequency L-PA Mid device from the intermediate-frequency transmitting port 4G MB RFIN, is amplified by the second power amplifier 112, and then is output to a single port of the fifth switching unit 115, and then is filtered by the fourth filtering circuit 116 through the transmitting paths of the fifth switching units 115 to B41, and then is output to the first end (e.g. contact 6) of the first switching unit 120, and then is output to the second antenna port ANT2 through the first switching unit 120, so as to realize the transmission of the B41 signal.

And (3) receiving control: the high-frequency signal enters the radio-frequency L-PA Mid device from the second antenna port ANT2, is switched to the receiving path of B41 by the first switch unit 120, is filtered by the fourth filter circuit 116, and then outputs the B41 signal to the fifth switch unit 115 (e.g., a radio-frequency 4P4T switch), is switched to the third switch unit 145 (e.g., a radio-frequency SP4T switch) by the radio-frequency 4P4T switch, is switched to the second low-noise amplifier 141 by the radio-frequency SP4T switch, and is switched to the receiving port LNA OUT by the sixth switch unit 160 (e.g., a radio-frequency 4P4T switch) to realize the receiving control of the B41 signal.

In one embodiment, as shown in fig. 5, the fifth switching unit 115 is a rf 5P5T switch, and the rf 5P5T switch includes five first terminals and five second terminals, compared to the rf L-PA Mid device shown in fig. 4b, which is shown in fig. 5. Among the five first terminals, one first terminal is connected to the output terminal of the second power amplifier 112, the other first terminal is directly connected to the input terminal of a second low noise amplifier 141, and the connection manner of the second terminals of the fifth switch unit 115 is the same as that of the second terminals of the fifth switch unit 115 in the rf L-PA Mid device shown in fig. 5, which is not described herein again.

When the high-frequency signal is a high-frequency signal operating in the TDD system, such as the B41 and B40 signals, the reception path of the high-frequency signal is configured by the second antenna port ANT2, the first switching unit 120, the fourth filter circuit 116, the fifth switching unit 115, the second low-noise amplifier 141, and the reception port LNA OUT, or is configured by the second antenna port ANT2, the first switching unit 120, the second filter circuit 143, the fifth switching unit 115, the third switching unit 145, the second low-noise amplifier 141, and the reception port LNA OUT. When the high-frequency signal is a high-frequency signal such as a B7 signal that operates in the FDD system, the reception path of the high-frequency signal may be configured based on the second antenna port ANT2, the first switching unit 120, the second filtering circuit 143, the third switching unit 145, the second low-noise amplifier 141, and the reception port LNA OUT.

Based on the radio frequency L-PA Mid device shown in fig. 5, the reception control of the B41 signal is explained:

and (3) receiving control: the high-frequency signal enters the radio frequency L-PA Mid device from the second antenna port ANT2, is switched to the receiving path of B41 by the first switch unit 120, is filtered by the fourth filter circuit 116, and outputs the B41 signal to the fifth switch unit 115 (e.g., a radio frequency 5P5T switch), is switched to the second low-noise amplifier 141 by the radio frequency 5P5T switch, and is further switched to the receiving port LNA OUT by the sixth switch unit 160 (e.g., a radio frequency 4P4T switch), so as to realize the receiving control of the B41 signal.

The transmission control of the B41 signal is the same as that of the B41 signal in the radio frequency L-PA Mid device shown in fig. 5, and will not be described herein.

Based on the rf L-PA Mid device shown in fig. 4a and fig. 5, the transceiving paths of the intermediate frequency signals and the transceiving paths of the high frequency signals are integrated in the rf L-PA Mid device, so that an external change-over switch and a matching circuit can be avoided, and further, the wiring loss on the receiving path can be reduced, and meanwhile, the gain coefficients of the first low noise amplifier 131 and the second low noise amplifier 141 are adjusted by the first control unit 150, so that the cascade noise coefficient of the intermediate frequency signal receiving path and the cascade noise coefficient of the high frequency signal receiving path can be further reduced, and further, the sensitivity of the rf L-PA Mid device can be improved and the power consumption of the rf L-PA Mid device can be reduced. In addition, by arranging the first filter circuit 133, the second filter circuit 143, the third filter circuit 114 and the fourth filter circuit 116 in the radio frequency L-PA Mid device, the outer band stray waves of the middle and high frequency signals on the corresponding receiving and transmitting paths can be filtered, so that the communication performance of the radio frequency L-PA Mid device is improved.

By providing the sixth switching unit 160 in the rf L-PA Mid device, the path between any one of the first low noise amplifier 131 and any one of the receiving ports LNA OUT and the path between any one of the second low noise amplifier 141 and any one of the receiving ports LNA OUT can be selectively conducted, so that the flexibility of the output intermediate frequency signal and high frequency signal can be improved.

As shown in fig. 6 and 7, in one embodiment, the rf L-PA Mid device is further configured with a coupling output port CPLOUTCPLOUT, and the rf L-PA Mid device further includes a first coupling unit 161, a second coupling unit 162, and a coupling switch 163. The first coupling unit 161 may be coupled between a second end of the first switching unit 120 and the first antenna port ANT1, that is, disposed in a transmission path of the intermediate frequency signal, for coupling the intermediate frequency signal in the transmission path to output a first coupling signal via the coupling end of the first coupling unit 161. Wherein the first coupling signal is operable to measure a forward coupling power and a reverse coupling power of the intermediate frequency signal. The second coupling unit may be coupled between the other second end of the first switching unit 120 and the second antenna port ANT2, i.e., disposed in a transmission path of the high frequency signal, for coupling the high frequency signal in the transmission path to output a second coupling signal via a coupling port of the second coupling unit. Wherein the first coupling signal is operable to measure a forward coupling power and a reverse coupling power of the high frequency signal.

The first coupling unit 161 and the second coupling unit 162 have the same structure, and the first coupling unit 161 will be described as an example. Specifically, the first coupling unit 161 includes an input terminal, an output terminal, and a coupling terminal. The input end of the first coupling unit 161 is connected to a second end of the first switch unit 120, the output end of the first coupling unit 161 is connected to the first antenna port ANT1, and the coupling end is configured to couple the intermediate frequency signal received by the input end and output a first coupling signal, where the first coupling signal includes a first forward coupling signal and a first reverse coupling signal. The forward power information of the intermediate frequency signal can be detected based on a first forward coupling signal output by the coupling end; based on the first reverse coupling signal output by the coupling end, the reverse power information of the intermediate frequency signal can be correspondingly detected, and the detection mode is defined as a reverse power detection mode.

The coupling switch 163 is connected to the coupling terminal of the first coupling unit 161, the coupling terminal of the second coupling unit 162, and the coupling output port CPLOUT, respectively, for selectively outputting the first coupling signal or the second coupling signal to the coupling output port. That is, the coupling switch 163 is used to switch between the detection mode of the first coupling signal and the detection mode of the second coupling signal.

In this embodiment, only one coupling output port CPLOUT is provided for the rf L-PA Mid device, and since the intermediate frequency signals and the high frequency signals in the multiple frequency bands are not transmitted simultaneously, one coupling output port CPLOUT can also meet the communication requirement, and also reduce the complexity of the rf routing in the rf L-PA Mid device, and simultaneously improve the isolation performance of each routing of the rf L-PA Mid device.

In one embodiment, the radio frequency L-PA Mid device further includes a second control unit 170. The second control unit 170 is connected to each switch unit, for example, the first switch unit 120, the second switch units 135, …, the sixth switch circuit unit, the first power amplifier 111, and the second power amplifier 112, and is used for controlling on/off of each switch unit and also for controlling an operation state of each power amplifier. The second control unit 170 is the same as the first control unit 150, and may be a MIPI-RFFE control unit, which conforms to the control protocol of the RFFE bus.

It should be noted that, in the embodiment of the present application, the control logic of each switch unit is matched with the control logic of the second control unit 170, and in the embodiment of the present application, the specific types of each switch unit, the first control unit 150, and the second control unit 170 are not further limited.

As shown in fig. 10 and 11, the embodiment of the application further provides a radio frequency transceiver system. In one embodiment, the radio frequency transceiver system includes the radio frequency L-PA Mid device, the first antenna MB ANT, the second antenna HB ANT, and the radio frequency transceiver 20 of any of the previous embodiments.

In one embodiment, the first antenna MB ANT is connected to a port ANT1 of the first antenna MB ANT of the radio frequency L-PA Mid device, and is capable of receiving and transmitting an intermediate frequency signal. The second antenna HB ANT is connected to a second antenna HB ANT port ANT2 of the radio frequency L-PA Mid device, and can transmit and receive a high frequency signal. Specifically, the first antenna MB ANT and the second antenna HB ANT may be formed using any suitable type of antenna. For example, the first antenna MB ANT, the second antenna HB ANT may include an antenna having a resonant element formed of the following antenna structure: 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 combinations of frequency bands. In the embodiment of the present application, the types of the first antenna MB ANT and the second antenna HB ANT are not further limited.

According to the radio frequency receiving and transmitting system, the link loss of the medium and high frequency signal receiving paths can be reduced by arranging the radio frequency L-PA Mid device in any embodiment, so that the cascade noise coefficients of the medium and high frequency signal receiving paths are reduced, and the sensitivity of the radio frequency receiving and transmitting system is improved.

According to the requirements of the communication protocol 3GPP, the performance index requirements of adjacent channel leakage ratio (Adjacent Channel Leakage Ratio, ACLR) for the partial frequency band under the 5MHz test bandwidth are shown in the following Table 1.

Table 1 ACLR index requirements for 3gpp protocols

Frequency band	B3	B8	B12	B20	B25	B28A	B41
								ACLR(dBc)	-30	-30	-30	-30	-30	-30	-30

Adjacent channel leakage ratio, defined as the ratio of the transmit power of the primary channel to the measured adjacent RF channel power; the smaller the adjacent frequency channel leakage ratio is, the smaller the leakage power of the main channel is, and the better the linearity of the radio frequency receiving and transmitting system is; the greater the adjacent channel leakage ratio, the greater the main channel leakage power, and the poorer the linearity of the radio frequency transceiver system.

According to the requirements of the communication protocol 3GPP, the performance index requirements for the sensitivity of the partial frequency band under the 5MHz test bandwidth are shown in the following Table 2.

Table 2 sensitivity index requirements of 3gpp protocols

Frequency band	B3	B8	B12	B13	B20	B25	B41
								Sensitivity (dBm)	-98	-97	-97	-97	-97	-98.5	-98.5

The radio frequency transceiving system shown in fig. 10 is constructed based on the radio frequency L-PA Mid device shown in fig. 6. The rf transceiver system shown in fig. 10 illustrates the working principle of the B25 signal:

Emission control: the intermediate frequency signal is output from the radio frequency transceiver 20 to the intermediate frequency emission port 4G MB RFIN of the radio frequency L-PA Mid device, amplified by the first power amplifier 111, output to a single port of the fourth switch unit 113, filtered by the third filter circuit 114 through the emission path of the fourth switch unit 113 to B25, output the B25 signal to the first end (e.g. contact 1) of the first switch unit 120, and output to the first antenna MB ANT port ANT1 through the first switch unit 120, and the first antenna MB ANT emits the received B25 signal to implement emission control of the B25 signal.

And (3) receiving control: the first antenna MB ANT inputs the received intermediate frequency signal to the port ANT1 of the first antenna MB ANT of the radio frequency L-PA Mid device, the first switch unit 120 switches to the receiving path of B25, after filtering by the third filter circuit 114, outputs the B25 signal to the second switch unit 135 (for example, the first SP3T switch 1351), the first SP3T switch 1351 switches to the first low noise amplifier 131, and the sixth switch unit 160 switches to the receiving port LNA OUT, so as to transmit to the radio frequency transceiver 20, so as to realize the receiving control of the B25 signal.

And combining the sensitivity calculation formula, and when the bandwidth of the working frequency band is determined, the noise coefficient of the receiving path directly influences the sensitivity index of the radio frequency receiving and transmitting system. Thus, the noise figure of the receive path of the B25 signal is analyzed as shown in table 3:

Table 3 sensitivity of a receive path for receiving B25 signals in a radio frequency system

In table 3, the insertion loss between the first antenna MB ANT and the intermediate frequency transmitting port 4G MB RFIN of the radio frequency L-PA Mid device, including the antenna socket, the combiner, the switch and the trace, is the passive loss of the whole link, and the passive loss is 3.8-4.9 dB in the 1850-1915 MHz frequency band. The insertion loss of the third and sixth switching units 145 and 160 are shown in tables 4 to 5, and the noise figure of the first low noise amplifier 131 is shown in table 6.

TABLE 4 insertion loss of third switching element 145 inside RF L-PA Mid device

Frequency of	Insertion loss
		1850～1990	0.6

TABLE 5 insertion loss of 4P4T switch inside RF L-PA Mid device

Frequency of	Insertion loss
		699～960	0.5
1710～2220	0.7
		2300～2700	0.8

TABLE 6 noise figure of first low noise amplifier 131 inside radio frequency L-PA Mid device

Device and method for manufacturing the same	Gain (dB)	Noise figure (dB)
			Index (I)	15.5	3

Trace 1 may be understood as a trace between a radio frequency L-PA Mid device and radio frequency transceiver 20 with an insertion loss of about 1dB; the noise figure of the radio frequency transceiver 20 is 10dB. As shown in Table 3, the sensitivity is-101 dBm/5MHz, which is improved by 1dB compared with the traditional radio frequency transceiver system; meanwhile, the sensitivity index of the radio frequency receiving and transmitting system in the embodiment is higher than the requirement of-10 dBm/5MHz required by research and development.

The radio frequency transceiving system shown in fig. 10 is constructed based on the radio frequency L-PA Mid device shown in fig. 6. The rf transceiver system shown in fig. 10 illustrates the working principle of the B41 signal:

and (3) receiving control: the second antenna HB ANT inputs the received high-frequency signal to the second antenna HB ANT port ANT2 of the radio-frequency L-PA Mid device, the first switching unit 120 switches to the receiving path of the B41, the fourth filtering circuit 116 filters the received high-frequency signal, and outputs the B41 signal to the fifth switching unit 115 (e.g., the radio-frequency 4P4T switch), the radio-frequency 4P4T switch switches to the third switching unit 145 (e.g., the radio-frequency SP4T switch), the radio-frequency SP4T switch switches to the second low-noise amplifier 141, and the sixth switching unit 160 (e.g., the radio-frequency 4P4T switch) switches to the receiving port LNA OUT, so as to transmit the B41 signal to the radio-frequency transceiver 20, thereby realizing the receiving control of the B41 signal.

And combining the sensitivity calculation formula, and when the bandwidth of the working frequency band is determined, the noise coefficient of the receiving path directly influences the sensitivity index of the radio frequency receiving and transmitting system. Therefore, the noise figure of the receiving path of the B25 signal was analyzed as shown in table 7.

TABLE 7 sensitivity of receive path for receiving B25 signals in RF systems

As shown in Table 7, the sensitivity is-100.5 dBm/5MHz, which is 0.5dB higher than that of the traditional radio frequency transceiver system; meanwhile, the sensitivity index of the radio frequency receiving and transmitting system in the embodiment is higher than the requirement of-10 dBm/5MHz required by research and development.

Further, since the insertion loss between the first antenna MB ANT port ANT1 to the first antenna MB ANT is reduced, the transmission power consumption can be greatly reduced, and at the same time, ACLR performance can be improved, as shown in table 8.

TABLE 8 emission performance parameters

As shown in table 8, the radio frequency performance of the transmission path of the B25 signal is greatly improved, which is close to that of the transmission path of the B3 signal.

The radio frequency transceiving system shown in fig. 11 is constructed based on the radio frequency L-PA Mid device shown in fig. 7. The radio frequency transceiver system shown in fig. 11 illustrates the working principle of the B41 signal receiving control:

and (3) receiving control: the second antenna HB ANT inputs the received high-frequency signal to the second antenna HB ANT port ANT2 of the radio-frequency L-PA Mid device, the first switch unit 120 switches to the receiving path of the B41, the fourth filter circuit 116 filters the received high-frequency signal, the fifth switch unit 115 (e.g., the radio-frequency 5P5T switch) outputs the B41 signal, the radio-frequency 5P5T switch switches to the second low-noise amplifier 141, and the sixth switch unit 160 (e.g., the radio-frequency 4P4T switch) switches to the receiving port LNA OUT, so as to transmit the B41 signal to the radio-frequency transceiver 20, thereby realizing the receiving control of the B41 signal.

And combining the sensitivity calculation formula, and when the bandwidth of the working frequency band is determined, the noise coefficient of the receiving path directly influences the sensitivity index of the radio frequency receiving and transmitting system. Therefore, the noise figure of the receiving path of the B25 signal was analyzed as shown in table 9.

Table 9 noise figure of receive path for receiving B41 signal in radio frequency system

Trace 1 may be understood as a trace between a radio frequency L-PA Mid device and radio frequency transceiver 20 with an insertion loss of about 1dB; the noise figure of the radio frequency transceiver 20 is 10dB. As shown in Table 9, the sensitivity is-101 dBm/5MHz, and the sensitivity is improved by 0.5dB compared with the radio frequency transceiver system shown in FIG. 10; meanwhile, the sensitivity index of the radio frequency receiving and transmitting system in the embodiment is higher than the requirement of minus 100dBm/5MHz required by research and development.

The embodiment of the application also provides the communication equipment, and the radio frequency receiving and transmitting system in any embodiment is arranged on the communication equipment, so that the sensitivity of the communication equipment for receiving the intermediate frequency signals can be improved, and the wireless communication performance of the communication equipment can be improved.

The foregoing examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.

Claims

1. A radio frequency L-PA Mid device configured with a high frequency transmit port, an intermediate frequency transmit port, and a plurality of receive ports for connection to a radio frequency transceiver, and a plurality of antenna ports for connection to an antenna, the radio frequency L-PA Mid device comprising:

the first switch unit is characterized in that a plurality of first ends of the first switch unit are respectively and correspondingly connected with the transmitting module, and a plurality of second ends of the first switch unit are respectively and correspondingly connected with a plurality of antenna ports;

2. The radio frequency L-PA Mid device according to claim 1, said first receiving circuit further comprising:

the first filter circuits are correspondingly connected with a first end of the first switch unit, are used for filtering the received intermediate frequency signals, and the frequency bands of the intermediate frequency signals output by each first filter circuit are different;

the second switch unit is respectively connected with the plurality of first filter circuits and the input end of at least one first low noise amplifier, and is used for receiving a plurality of intermediate frequency signals and selecting at least one intermediate frequency signal for output.

3. The radio frequency L-PA Mid device according to claim 2, said first low noise amplifier being one in number, said second switching unit comprising a plurality of first terminals and a second terminal; the first ends are connected with the first filter circuits in a one-to-one correspondence manner; wherein,

The input end of the first low noise amplifier is connected with the second end of the second switch unit, and the output end of the first low noise amplifier is connected with one receiving port.

4. The radio frequency L-PA Mid device according to claim 2, said first low noise amplifier being two in number; the second switch unit comprises a plurality of first ends and two second ends, and the first ends are connected with the first filter circuits in a one-to-one correspondence manner; wherein,

an input end of the first low noise amplifier is connected with a second end of the second switch unit; the input end of the other first low noise amplifier is connected with the other second end of the second switch unit.

5. The radio frequency L-PA Mid device according to claim 2, said second receiving circuit further comprising:

the second filter circuits are correspondingly connected with a first end of the first switch unit, are used for filtering the received high-frequency signals and are different in frequency band of the high-frequency signals output by each second filter circuit;

and the third switch unit is respectively connected with the second filter circuits and the input ends of at least one second low-noise amplifier, and is used for receiving the high-frequency signals and selecting any high-frequency signal for output.

6. The radio frequency L-PA Mid device according to claim 1, said transmitting module comprising:

the input end of the first power amplifier is connected with the intermediate frequency transmitting port, and the output end of the first power amplifier is connected with the first end of the first switch unit and is used for amplifying a plurality of received intermediate frequency signals;

the input end of the second power amplifier is connected with the high-frequency transmitting port, and the output end of the second power amplifier is respectively connected with the second receiving circuit and the first end of the first switch unit and is used for amplifying the received high-frequency signals.

7. The radio frequency L-PA Mid device according to claim 6, said transmitting module further comprising a fourth switching unit, a plurality of third filter circuits, a fifth switching unit and a plurality of fourth filter circuits; wherein,

the first end of the fourth switch unit is connected with the output end of the first power amplifier, and each second end of the fourth switch unit is connected with the first switch unit through a third filter circuit;

a first end of the fifth switch unit is connected with the output end of the second power amplifier, the other first end of the fifth switch unit is connected with the second receiving circuit, and each second end of the fifth switch unit is connected with the first switch unit through a fourth filter circuit; wherein,

The third filter circuit is used for carrying out filter processing on the intermediate frequency signals, the fourth filter circuit is used for carrying out filter processing on the high frequency signals, and the frequency bands of signals output by the third filter circuit and the fourth filter circuit are different.

8. The rf L-PA Mid device according to claim 7, wherein another first terminal of said fifth switching unit is connected to an input terminal of said second low noise amplifier.

9. The rf L-PA Mid device according to claim 7, wherein another first terminal of said fifth switching unit is connected to an input terminal of said second low noise amplifier via a second switching unit of said first receiving circuit.

10. The radio frequency L-PA Mid device of claim 1, further comprising:

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

11. The radio frequency L-PA Mid device of claim 1, further configured with a coupling-out port, the radio frequency L-PA Mid device further comprising:

The first coupling unit is arranged in a transmitting path of the intermediate frequency signal and is used for coupling the intermediate frequency signal in the transmitting path to output a first coupling signal through a coupling end of the first coupling unit;

a second coupling unit disposed in a transmission path of the high frequency signal, for coupling the high frequency signal in the transmission path to output a second coupling signal via a coupling end of the second coupling unit;

and the coupling switch is respectively connected with the coupling end of the first coupling unit, the coupling end of the second coupling unit and the coupling output port and is used for selectively outputting the first coupling signal or the second coupling signal to the coupling output port.

12. The radio frequency L-PA Mid device according to any one of claims 1-11, the frequency band of the intermediate frequency signal comprising: at least two of the frequency bands B1, B3, B25, B34, B66, and B39, the frequency bands of the high frequency signal including: at least two of the B30, B7, B40 and B41 bands.

13. A radio frequency transceiver system, comprising:

the radio frequency L-PA Mid device of any one of claim 1-12,

and the radio frequency transceiver is respectively connected with the transmitting port and the receiving port of the radio frequency L-PA Mid device.

14. A communication device comprising the radio frequency transceiver system of claim 13.