WO2022257651A1

WO2022257651A1 - Radio frequency transmission module, radio frequency system, and communication device

Info

Publication number: WO2022257651A1
Application number: PCT/CN2022/090883
Authority: WO
Inventors: 岳仲博
Original assignee: Oppo广东移动通信有限公司
Priority date: 2021-06-09
Filing date: 2022-05-05
Publication date: 2022-12-15
Also published as: CN215871375U

Abstract

A radio frequency transmission module, the radio frequency transmission module comprising: a first power supply module (120) and a first transmission module (110). The first transmission module (110) is configured with a power supply port (VCC) connected to the first power supply module (120), a first input port (INPUT) for connecting to a radio frequency transceiver, and a first output port (OUTPUT1) for connecting to an antenna. The first transmission module (110) further comprises: a power distribution unit (111), a plurality of first power amplifiers (113) and a power synthesis unit (112); a plurality of input ends of the power synthesis unit (112) are connected to the output ends of the plurality of first power amplifiers (113) in one-to-one correspondence; an output end of the power synthesis unit (112) is connected to the first output port (OUTPUT1), and is used to synthesize the output powers of the plurality of first power amplifiers (113) so as to output a high-frequency signal having a target power.

Description

RF transmitter module, RF system and communication equipment

Cross References to Related Applications

This application claims the priority of a Chinese patent application with the application number 2021212935015 filed with the China Patent Office on June 9, 2021, entitled "Radio Frequency Transmitting Module, Radio Frequency System, and Communication Equipment", the entire contents of which are incorporated herein by reference Applying.

technical field

The embodiments of the present application relate to the technical field of communication, and in particular, to a radio frequency transmitting module, a radio frequency system and communication equipment.

Background technique

The current wireless communication network technology is developing rapidly, and the communication standard has been rapidly upgraded from 2G to 3G/4G/5G with higher bandwidth. With the improvement of bandwidth, the service content that can be brought to people is also becoming more and more abundant. However, in order to meet the 5G transmission power level defined by the 3rd Generation Partnership Project (3GPP), for example, the transmission power corresponding to the transmission power level PC2 needs to reach 26dBm, generally by setting the boost power supply (for example, Buck -Boost power supply) to increase the power supply voltage of the power amplifier in the radio frequency transmission front-end module, to increase the output power of the power amplifier. However, if a boosted power supply is used to provide the power supply voltage of the power amplifier, the cost of the boosted power supply is high.

Contents of the invention

According to various embodiments of the present application, a radio frequency transmitting module, a radio frequency system and a communication device are provided.

A radio frequency transmitting module, comprising:

a first power module, configured to provide a preset power supply voltage;

The first transmitting module is configured with a power port connected to the first power module, a first input port used to connect to the radio frequency transceiver, and a first output port used to connect to the antenna, wherein the first transmitting module Also includes:

A power distribution unit, the input end of the power distribution unit is connected to the first input end, and is used to perform power distribution processing on the received high-frequency signal of the first standard;

A plurality of first power amplifiers, the input ends of the plurality of first power amplifiers are respectively connected to the plurality of output ends of the power distribution unit in one-to-one correspondence, and the power supply ends of the plurality of first power amplifiers are respectively connected to the plurality of output ends of the power distribution unit. The power port is connected, and the first power amplifier is used to amplify the power of the high-frequency signal under the action of the power supply voltage;

A power combining unit, the plurality of input ends of the power combining unit are respectively connected to the output ends of a plurality of first power amplifiers in one-to-one correspondence, and the output ends of the first power combining unit are connected to the first output port, using Combining output powers of multiple first power amplifiers to output high frequency signals with target power.

A radio frequency system, comprising: a radio frequency transceiver, a first antenna, and the aforementioned radio frequency transmitting module connected to the radio frequency transceiver.

A radio frequency system, comprising: a radio frequency transceiver, a first antenna, a second antenna, a second transmitting module, a second power supply module, and the aforementioned radio frequency transmitting module;

The second transmitting module includes:

A fifth power amplifier, the input terminal of the fifth power amplifier is connected to the radio frequency transceiver, the power supply terminal of the fifth power amplifier is connected to the second power supply module, and is used under the action of the power supply voltage , performing power amplification on the received low-frequency signal of the first standard;

A sixth power amplifier, the input end of the sixth power amplifier is connected to the radio frequency transceiver, the power supply end of the sixth power amplifier is connected to the second power supply module, and is used to operate under the action of the power supply voltage , performing power amplification on the received radio frequency signal of the second standard;

The second switch unit includes two first terminals and two second terminals, wherein the two first terminals are respectively connected to the output terminal of the fifth power amplifier and the output terminal of the sixth power amplifier in a one-to-one correspondence, so A first end of the second switch unit is connected to the second antenna; wherein,

The first switch unit further includes a first terminal connected to the other second terminal of the second switch unit, wherein the first switch unit is also used for selectively conducting the sixth power amplifier and A path between the first antenna and the second antenna.

A communication device, including: the aforementioned radio frequency system.

The details of one or more embodiments of the application are set forth in the accompanying drawings and the description below. Other features, objects and advantages of the present application will be apparent from the description, drawings and claims.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the traditional technology. Obviously, the accompanying drawings in the following description are only the present invention For some embodiments of the application, those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is one of structural block diagrams of the radio frequency transmitting module of an embodiment;

Fig. 2 is a schematic diagram of the principle of the first power module of an embodiment;

Fig. 3 is a schematic diagram of the internal structure of the first power amplifier of an embodiment;

Fig. 4 is a schematic diagram of an internal structural heating area of a power amplifier in the related art of an embodiment;

Fig. 5 is a schematic diagram of the internal structure heating area of two first power amplifiers of an embodiment;

Fig. 6 is the second structural block diagram of the radio frequency transmission module of an embodiment;

Fig. 7 is the third structural block diagram of the radio frequency transmission module of an embodiment;

Fig. 8 is the fourth structural block diagram of the radio frequency transmission module of an embodiment;

Fig. 9 is the fifth structural block diagram of the radio frequency transmission module of an embodiment;

Fig. 10 is the sixth structural block diagram of the radio frequency transmitting module of an embodiment;

Fig. 11 is the seventh structural block diagram of the radio frequency transmission module of an embodiment;

Fig. 12 is the eighth structural block diagram of the radio frequency transmission module of an embodiment;

Fig. 13 is one of structural block diagrams of the radio frequency system of an embodiment;

Fig. 14 is the second structural block diagram of the radio frequency system of an embodiment;

FIG. 15 is a schematic diagram of the principle of a 2G call in an embodiment;

FIG. 16 is a third structural block diagram of a radio frequency system according to an embodiment.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present application clearer, the following will describe the embodiments of the present application more comprehensively with reference to the relevant drawings in order to facilitate the understanding of the embodiments of the present application in combination with the accompanying drawings and embodiments. A preferred embodiment of the embodiments of the application is given in the accompanying drawings. However, the embodiments of the present application can be implemented in many different forms, and are not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the embodiments of the present application more thorough and comprehensive.

It can be understood that the terms "first", "second" and the like used in this application may be used to describe various elements herein, but these elements are not limited by these terms. These terms are only used to distinguish one element from another element. For example, a first power amplifier could be termed a second power amplifier, and, similarly, a second power amplifier could be termed a first power amplifier, without departing from the scope of the present application. Both the first power amplifier and the second power amplifier are power amplifiers, but they are not the same power amplifier.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present application, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined. In the description of the present application, "several" means at least one, such as one, two, etc., unless otherwise specifically defined.

The radio frequency transmission module involved in the embodiment of the present application can be applied to a communication device with a wireless communication function, and the communication device can be a handheld device, a vehicle device, a wearable device, a computing device or other processing devices connected to a wireless modem, and various Various forms of user equipment (User Equipment, UE), such as mobile phones, mobile stations (Mobile Station, MS) and so on. For convenience of description, the devices mentioned above are collectively referred to as communication devices.

As shown in FIG. 1 , an embodiment of the present application provides a radio frequency transmitting module. In one of the embodiments, the radio frequency transmitting module includes a first transmitting module 110 and a first power supply module 120 . Wherein, the first transmitting module 110 can be understood as a package structure or an integrated chip, which is configured with a plurality of ports, for example, a power port VCC, a first input port INPUT, and a first output port OUTPUT1. Wherein, the plurality of ports may be understood as radio frequency pin terminals of the first transmitting module 110, for connecting with various external devices. Wherein, the power port VCC is used to receive the preset power supply voltage provided by the first power module 120; the first input port INPUT is used to connect with the radio frequency transceiver, and is used to receive the radio frequency signal generated by the radio frequency transceiver; the first output port OUTPUT1 is used to It is connected with an antenna, a radio frequency switch or a filtering unit, and is used for outputting the radio frequency signal processed by the first transmitting module 110 . Among them, the radio frequency signal may include the low frequency (Low band, LB) signal, the middle frequency (Middle band, MB) signal and the high frequency (High Band, HB) signal of the first standard, and may also include the low frequency signal and the high frequency signal of the second standard. Signal. The radio frequency signals of different standards can support different services. For example, the radio frequency signals of the first standard can be mainly used to support Internet access services; the radio frequency signals of the second standard can be mainly used to support voice call services. Specifically, the first standard may be a 4G standard and/or a 5G standard. The second standard may be a 2G communication standard, for example, a Global System for Mobile Communications (Global System for Mobile Communications, GSM) communication standard.

For ease of description, in this embodiment of the application, the first standard is the 5G standard as an example for description. Specifically, the corresponding frequency bands of the low-frequency, medium-frequency and high-frequency signals of the first standard are shown in Table 1.

Table 1 shows the corresponding frequency bands of the low frequency, intermediate frequency and high frequency signals of the first standard

In order to improve the wireless communication performance of 5G NR signals, the 3rd Generation Partnership Project (3rd Generation Partnership Project, 3GPP) has defined a number of features for improving communication distance and communication speed, such as large-scale wireless signal multiple-input multiple-output technology ( Multiple-Input Multiple-Output, MIMO) and Power Class 2 power levels. For the convenience of description, the embodiment of the present application uses the characteristic improvement of the Power Class 2 power level for description. The transmit power levels of 5G communication equipment currently defined by 3GPP are mainly shown in Table 2.

Table 2 shows the overall transmission power level of communication equipment defined by 3GPP

Generally, the output power of the radio frequency signal of the first standard in most frequency bands needs to meet the PC2 power level. For example, the output power of the radio frequency signal in the n41 frequency band needs to meet the requirement of the PC2 power level.

Among them, the communication distance between the communication equipment and the base station is directly related to the transmission power, and the total spatial attenuation of electromagnetic waves can be calculated according to the following formula:

ATT=receiving sensitivity+transmitting power=32.45+20lg(F)+20lg(D);

Among them, ATT refers to the total attenuation of the space, and the unit of the total attenuation of the space is dB; F refers to the frequency of the radio frequency signal, and the unit of the frequency is MHz; D refers to the communication distance between the communication equipment and the base station, and the unit of the communication distance for KM.

The base station has the same reception sensitivity for signals in the same frequency band and the same bandwidth, so the ATT mainly depends on the transmission power; the higher the transmission power, the greater the total space attenuation, and the greater the communication distance D between the communication equipment and the base station. Since the PC2 power level is 3dB higher than PC3, and the total space attenuation is also 3dB higher than PC3, according to the above formula, the communication distance of a communication device with a PC2 power level is 1.4 times that of a communication device with a PC3 power level. If the communication distance is increased, the communication performance of the mobile terminal can be improved, and the base station can cover a larger radiation range, which can reduce the number of base station construction and direct infrastructure investment, such as maintenance costs and electricity costs.

Please continue to refer to FIG. 1 , the first transmitting module 110 further includes a power distribution unit 111 , a power combining unit 112 and a plurality of first power amplifiers 113 . Wherein, the input terminal of the power distribution unit 111 is connected to the first input port INPUT1, and the multiple output terminals of the power distribution unit 111 are respectively connected to the input terminals of the multiple first power amplifiers 113 in a one-to-one correspondence, which is used for the first standard High frequency signals are processed for power distribution. Specifically, the power distribution unit 111 may perform equal-power or unequal-power distribution processing on the received high-frequency signals of the first standard. Wherein, the power distributing unit 111 may be a device having a power distributing function such as a power divider or a combiner.

The number of output terminals of the power distribution unit 111 and the number of input terminals of the power combining unit 112 are respectively associated with the quantity of the first power amplifier 113, for example, the number of output terminals of the first power divider and the number of input terminals of the power combining unit 112 are both It is equal to the number of the first power amplifiers 113 . Specifically, if the number of first power amplifiers 113 is n, the power distribution unit 111 may be an n-way power distributor, where n is a positive integer greater than or equal to 2. Wherein, the n output terminals of the n-way power divider are respectively connected to the input terminals of the n first power amplifiers 113 in a one-to-one correspondence.

The power supply terminals of the first power amplifiers 113 are respectively connected to the power port VCC, and the first power amplifiers 113 are used to amplify the power of the high-frequency signal of the first standard under the action of the power supply voltage. Wherein the output end of each first power amplifier 113 is respectively connected with each input end of the power combining unit 112, wherein, each first power amplifier 113 can amplify and process the high-frequency signal received by the first standard at the same time, and The amplified high-frequency signal of the first system is output to the power combining unit 112 .

A plurality of input terminals of the power combining unit 112 are respectively connected to the output terminals of a plurality of first power amplifiers 113 in a one-to-one correspondence, and the output terminals of the power combining unit 112 are connected with the first output port OUTPUT1 for multiple first power amplifiers The output power of 113 is combined to output a high frequency signal with target power. Exemplarily, if the number of the first power amplifier 113 is two, its power combining unit 112 can be a dual power combining unit 112; if the number of the first power amplifier 113 is three, its power combining unit 112 can be three Channel power combining unit 112 and so on.

Specifically, the power combining unit 112 can simultaneously receive the high-frequency signals of the first standard output by the first power amplifiers 113, and combine the output power of the high-frequency signals of the first standards, so that the output power of the high-frequency signals of the first standard can be output to the first output The power value of the high-frequency signal of the first standard at the port OUTPUT1 reaches the target power. Wherein, the target power may be understood as the lowest standard power of the frequency band signal that can support the corresponding standard, for example, the lowest standard of the high frequency signal of the first standard is 33dBm. Exemplarily, if the number of the first power amplifier 113 is two, and the output power of each first power amplifier 113 can output more than 1W (30dBm), then the output power of the power combining unit 112 after the power combining process can exceed 2W (33dBm), so as to satisfy the communication standard of the high-frequency signal of the first standard at the same time.

The first power module 120 is configured to provide a preset power supply voltage. The power supply voltage Vcc provided by the first power supply module 120 can supply power to each power amplifier in the first transmission module. Specifically, the power supply voltage Vcc provided by the first power module 120 can be transmitted to the power supply terminal of the first power amplifier 113 through the power port VCC, so as to provide power for the first power amplifier 113 . In the embodiment of the present application, the first power supply module 120 may adopt a step-down power supply (Buck Source), and the supply voltage Vcc at its output terminal is between 3.4V-4.2V. The step-down power supply can be understood as an output voltage Vcc_OUT lower than the input voltage Vcc_IN, that is, a step-down adjustable regulated DC power supply, as shown in FIG. 2 , Vcc_OUT<Vcc_IN. Wherein, the input voltage Vcc_IN of the first battery module may be the output voltage of the battery unit of the communication device, generally between 3.4-4.2V.

Specifically, the operating voltage of the power amplifier directly determines its output power. Specifically, the calculation formula of the output power of the power amplifier is as follows:

Pout = Vcc ² /R;

Among them, Pout is the output power of the power amplifier; Vcc is the working voltage of the power amplifier; R is the output load impedance of the power amplifier.

It can be seen from the above formula that, as the working voltage of the power amplifier increases, the output power of the power amplifier will also greatly increase correspondingly.

In the related art, in order to increase the output power of the power amplifier, for example, in order to make the output power of the power amplifier 113 reach the target power, for example, 33dBm, a more advanced process is generally used in the process of the power amplifier, and the power amplifier is continuously improved. The highest withstand voltage, and by increasing the operating voltage of the power amplifier. However, the improvement of the working voltage requires the use of a buck-boost source (Buck-Boost Source), which can boost the working voltage (for example, 3.4-4.2V) of the battery unit of the communication device to 4.5V-5.0V. The power amplifier supplies power.

In the radio frequency transmission module provided in the embodiment of the present application, by using the first power supply module 120 to supply power to a plurality of first power amplifiers 113 in the first transmission module, the power supply voltage Vcc of the power amplifier can not be increased. Above all, the power output capability of the first power amplifier 113 is improved by increasing the number of the first power amplifier 113 and the power combining unit 112, so that the power output capability can meet the power level requirement of the PC2. Therefore, the operating voltage of the first power amplifier 113 can be reduced from 4.5-5.0V to about 3.4V, thereby avoiding the scheme of increasing the output power of the PA by using a high-cost step-up Buck-Boost power supply in the related art. Reducing costs can significantly improve the market quality of 5G PA, promote the substitution of domestic components, and optimize the supply pattern of components.

As shown in FIG. 3 , in one embodiment, each first power amplifier 113 includes several triodes arranged in parallel, for example, may include q triodes, and q is greater than or equal to two. Wherein, the number of triodes is directly proportional to the output power of the first power amplifier 113 . That is, the more transistors included in the first power amplifier 113, the stronger its output power capability will be. In the embodiment of the present application, the number of triodes included in each first power amplifier 113 may be equal or unequal. For ease of description, in the embodiment of the present application, the number of triodes included in each first power amplifier 113 may be equal.

In the embodiment of the application, by setting a plurality of first power amplifiers 113, it is possible to avoid setting all triodes (for example, q*n triodes) in the same first power amplifier 113 in the related art, and q= 8, n=2 as an example for illustration, as shown in FIG. 4 . When the 16 triodes set in the same power amplifier work at the same time, each triode will generate a lot of heat, and the heat dissipation environment of the No. 7-10 triode in the middle is the worst, and the temperature of the tube core will rise rapidly, which will cause power failure. The lower the gain of the amplifier, the lower the output power capability. In the embodiment of the present application, by setting a plurality of first power amplifiers 113, each of the first power amplifiers 113 includes several q transistors arranged in parallel, which can improve the heat dissipation of the plurality of transistors in the first power amplifier 113. The environment, as shown in FIG. 5 , taking q=8 and n=2 as an example, can further improve the phenomenon that the output power of the first power amplifier 113 decreases due to thermal effects. At the same time, if the output powers of multiple first power amplifiers 113 are combined by means of differential equal power combination, the impedance conversion ratio of the matching network can be reduced, and the loss of the matching network can be reduced. After simulation and experimental test data, the method of using differential power combination The loss of the matching network is about 0.5 dB smaller than that of the matching network in the related art, which can further improve the power output capability of the first power amplifier 113 .

It should be noted that, in the embodiment of the present application, the number of first power amplifiers 113 and the number of transistors included in each first power amplifier 113 are not further limited, and can be set according to actual needs.

As shown in Figures 6 and 7, in one embodiment, the first transmitting module 110 is configured with a second input port INPUT2 for connecting with a radio frequency transceiver, wherein the first transmitting module 110 also includes a second power amplifier 114. Wherein, the input end of the second power amplifier 114 is connected to the second input port INPUT2, the power supply end of the second power amplifier 114 is connected to the power port VCC, and the second power amplifier 114 is used for receiving Power amplification is performed on the intermediate frequency signal of the first standard.

Further, the radio frequency transmission module also includes a first switch unit 130 which can be integrated in the first transmission module 110 or external to the first transmission module 110 . The first switch unit 130 includes two first ends and a second end, wherein the two first ends are respectively connected to the output end of the power combining unit 112 and the output end of the second power amplifier 114 in a one-to-one correspondence, and the first switch The second end of the unit 130 is used for connecting with the antenna, and for selectively conducting the path between the first power amplifier 113 or the second power amplifier 114 and the antenna. Specifically, the first switch unit 130 may also be a double-pole double-throw switch, or other combinations of switches capable of selective switching.

In the embodiment of the present application, the radio frequency transmission module may include a first switch unit 130, and the first transmission module 110 includes a first power amplifier 113 and a second power amplifier 114, which can support the high-frequency signal of the first standard and the first The power amplification of the intermediate frequency signal of the standard can further realize the transmission switching processing of the medium and high frequency signals of the first standard, which expands the frequency band range of the signal transmitted by the radio frequency transmitting module.

As shown in FIG. 8 and FIG. 9 , in one embodiment, the radio frequency transmitting module further includes a first filtering unit 140 and a second filtering unit 150 . Wherein, the first filtering unit 140 is respectively connected to the output end of the power combining unit 112 and the first switching unit 130 for filtering the high frequency signal. Specifically, the first filtering unit 140 may be a high-pass filter, which only allows high-frequency signals in a preset frequency band to pass through, and can filter out harmonics generated by the first power amplifier 113 during signal amplification. The second filter unit 150 is respectively connected to the output terminal of the second power amplifier 114 and the first switch unit 130 for filtering the intermediate frequency signal. Specifically, the first filtering unit 140 may be a medium-pass filter, allowing only intermediate frequency signals of a preset frequency band to pass through, and filtering out harmonics generated by the second power amplifier 114 during signal amplification.

Please continue to refer to FIG. 8. In one embodiment, the first switch unit 130, the first filter unit 140, and the second filter unit 150 can all be built in the first transmitting module 110, and the first transmitting module 110 can be used as a radio frequency PA Mid device. Among them, the RF PA Mid device can be understood as a PA module integrating a duplexer (Power amplifier Module including Duplexer). When the first switch unit 130, the first filter unit 140, and the second filter unit 150 are built in the first transmitting module 110, the second end of the first switch unit 130 is connected to the first output port OUTPUT1, and the first output Port OUTPUT1 is used to connect with the antenna.

In the embodiment of the present application, a plurality of first power amplifiers 113, second power amplifiers 114, first switch unit 130, first filter unit 140, and second filter unit 150 are integrated into the first transmitting module 110, which can improve the The integration of the transmitting module 110 can further reduce the occupied space of the radio frequency transmitting module.

Please continue to refer to FIG. 9. In one embodiment, the first switch unit 130, the first filter unit 140, and the second filter unit 150 can also be placed outside the first transmitting module 110, and the first transmitting module 110 can be Can be used as RF MMPA devices. Among them, the radio frequency MMPA device can be understood as a multi-mode multi-frequency power amplifier, which can support the power amplification of radio frequency signals in multiple frequency bands, so that the radio frequency signal output by the first transmitting module 110 has higher output power and can transmit more power. long distance. When the first switch unit 130, the first filter unit 140, and the second filter unit 150 are built in and placed outside the first transmitting module 110, the first transmitting module 110 can be configured with a first output port OUTPUT1 and a second output port OUTPUT2, wherein, The first output port OUTPUT1 may be connected to the first filter unit 140 , and the second output port OUTPUT2 may be connected to the second filter unit 150 .

As shown in FIG. 10 , in one embodiment, the first transmitting module 110 is configured with a third input port INPUT3 for connecting with a radio frequency transceiver, wherein the first transmitting module 110 further includes a third power amplifier 115 . Wherein, the input end of the third power amplifier 115 is connected to the third input port INPUT3, and the power supply end of the third power amplifier 115 is connected to the first power supply module 120, which is used for receiving the received first system under the action of the power supply voltage Vcc. The power amplification of the low frequency signal.

When the first transmitting module 110 includes the first power amplifier 113, the second power amplifier 114 and the third power amplifier 115, its first switch unit 130 may include three first terminals and one second terminal. Wherein, the three first ends are connected with the output end of the power combining unit 112, the output end of the second power amplifier 114, and the output end of the third power amplifier 115 respectively, and the output end of the first switch unit 130 is used for connecting with the output end of the third power amplifier 115. Antenna connection. Wherein, the first switch unit 130 is used for selectively conducting the path between any one of the first power amplifier 113 , the second power amplifier 114 , and the third power amplifier 115 and the antenna.

In the embodiment of the present application, the radio frequency transmission module may include a first switch unit 130, and the first transmission module 110 can output a high-frequency signal of the first standard with the target power, and the radio frequency transmission module also includes a second power amplifier 114 and the third power amplifier 115 can support the power amplification of the high-frequency signal of the first standard and the intermediate frequency signal of the first standard, and then can realize the transmission and switching processing of the low, medium and high-frequency signals of the first standard. The range of the frequency band for transmitting signals by the radio frequency transmitting module is expanded.

As shown in FIGS. 11 and 12 , in one embodiment, the first transmitting module 110 further includes a third filtering unit 160 . Wherein the third filter unit 160 is respectively connected with the output end of the third power amplifier 115 and the first switch unit 130 for filtering the low frequency signal. Specifically, the third filtering unit 160 may be a low-frequency filter, which only allows low-frequency signals in a preset frequency band to pass through, and can filter out harmonics generated by the third power amplifier 115 during signal amplification.

In one of the embodiments, the third filtering unit 160 can be integrated in the aforementioned radio frequency PA Mid device (refer to FIG. 11 ), and can also be externally placed in the first transmitting module 110 (refer to FIG. 12 ). When the third filtering unit 160 is externally installed in the first radio frequency transmitting module, the first transmitting module 110 thereof also needs to be configured with a third output port OUTPUT3 connected to the output terminal of the third power amplifier 115 . Wherein, the third filter unit 160 is disposed between the third output port OUTPUT3 and the first switch unit 130 .

As shown in Figure 13, the embodiment of the present application also provides a radio frequency system, including: a radio frequency transceiver 20, a first antenna ANT1, and the radio frequency transmitting module 10 in any of the foregoing embodiments, wherein each input of the radio frequency transceiver module The ports are correspondingly connected to the radio frequency transceiver 20 . Among them, the radio frequency transceiver 20 is used to generate radio frequency signals, and can also process the received radio frequency signals, and control each switch in the radio frequency transmitting module 10 according to the current working frequency band.

The first antenna ANT1 can support the reception and transmission of low, medium and high frequency radio frequency signals, for example, it can radiate the radio frequency signals amplified by the power amplifier on the path to free space and the like. Wherein, the first antenna ANT1 may be a directional antenna, or may be a non-directional antenna. Exemplarily, the first antenna ANT1 may be formed using any suitable type of antenna. For example, the first antenna ANT1 may include an antenna with a resonant element formed of the following antenna structures: 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, At least one of dipole antennas, etc. In the embodiment of the present application, the type of the first antenna ANT1 is not limited to the above examples.

In the radio frequency system in the embodiment of the present application, by setting a power distribution unit 111, a plurality of first power amplifiers 113, and a power combining unit 112 in the first transmitting module 110, it is possible to pass The number of first power amplifiers, the power distribution unit and the power combination unit are increased to increase the power output capability of the first power amplifier, so that the power output capability can meet the power level requirement of PC2. Therefore, the operating voltage of the first power amplifier can be reduced from 4.5-5.0V to about 3.4V, thereby avoiding the need to increase the output power of the radio frequency transmitting module by using a high-cost boost Buck-Boost power supply in the related art. According to the scheme, the cost can be reduced, the impedance conversion ratio of the matching network can be reduced, and the loss of the matching network can be reduced, so as to improve the power output capability of the first power amplifier.

As shown in FIG. 14 , in one embodiment, the radio frequency system further includes a second power module 30 for providing a power supply voltage. Wherein, the second power supply module 30 is the same as the first power supply module 120 , both of which can be step-down power supplies. Specifically, the radio frequency system further includes a fourth power amplifier 40 . Wherein, the input end of the fourth power amplifier 40 is connected with the radio frequency transceiver 20, the power supply end of the fourth power amplifier 40 is connected with the second power supply module 30, and the output end of the fourth power amplifier 40 is connected with the first power supply module in the radio frequency transmitting module 10. A switch unit 130 is connected, and the fourth power amplifier 40 is used to amplify the power of the radio frequency signal of the second standard under the action of the supply voltage.

Wherein, the radio frequency signal of the second standard may include a low frequency signal of the second standard, such as GSM850, GSM900 and other frequency band signals, and a second standard high frequency signal, such as GSM1800, GSM1900 and other frequency band signals. As shown in Figure 15, the voice implementation under the 2G network is realized by using a network called Circuit Switched (CS).

In this embodiment, the radio frequency system processing can support the transmission processing of the radio frequency signal of the first standard, and by using the first power supply module to supply power to a plurality of first power amplifiers in the first transmission module, the power amplifier can be On the basis of the power supply voltage, the power output capability of the first power amplifier is improved by increasing the number of the first power amplifier, power distribution unit and power combination unit, so that the power output capability can meet the power level requirement of PC2. Therefore, the operating voltage of the first power amplifier can be reduced from 4.5-5.0V to about 3.4V, thereby avoiding the need to increase the output power of the radio frequency transmitting module by using a high-cost boost Buck-Boost power supply in the related art. The solution can reduce the cost, improve the heat dissipation environment of the power amplifier, reduce the impedance transformation ratio of the matching network, reduce the loss of the matching network, and improve the power output capability of the first power amplifier. At the same time, the radio frequency system can also support the transmission and processing of radio frequency signals of the second standard, which can expand the frequency range of the radio frequency system to transmit signals, increase the types of services that the radio frequency system can support, and be applicable to more communication scenarios.

As shown in Figure 16, the embodiment of the present application also provides a radio frequency system, including: a radio frequency transceiver 20, a second antenna ANT2, a third antenna ANT3, a second transmitting module 50, a third power supply module 60 and the The radio frequency transmitting module 10 shown in Figures 1, 6, 7, 10 and 11. Wherein, the second antenna ANT2 may be an antenna for supporting transmission and reception of medium and high frequency signals, and the third antenna ANT3 may be an antenna for supporting transmission and reception of low frequency signals. The antenna type of the third antenna ANT3 may be a directional antenna or a non-directional antenna. Wherein, the antenna type of the third antenna ANT3 may be the same as or different from that of the second antenna ANT2. In the embodiment of the present application, no further limitation is made on the antenna types of the second antenna ANT2 and the third antenna ANT3. Wherein, the third power supply module 60 is the same as the first power supply module 120, and both can be step-down power supplies.

Please continue to refer to FIG. 16, the second transmitting module 50 can also be a radio frequency PA Mid device. Wherein, the second transmitting module 50 may include: a fifth power amplifier 510 , a sixth power amplifier 520 and a second switch unit 530 . Specifically, the input end of the fifth power amplifier 510 is connected to the radio frequency transceiver 20, and the power supply end of the fifth power amplifier 510 is connected to the third power supply module 60, which is used for receiving the received first standard Power amplification of low frequency signals. The sixth power amplifier 520, the input end of the sixth power amplifier 520 is connected to the radio frequency transceiver 20, the power supply end of the sixth power amplifier 520 is connected to the third power supply module 60, and is used for receiving the first The power amplification of the radio frequency signal of the second standard.

The second switch unit 530 includes two first terminals and two second terminals, wherein the two first terminals are respectively connected to the output terminal of the fifth power amplifier 510 and the output terminal of the sixth power amplifier 520 in a one-to-one correspondence, A first end of the second switch unit 530 is connected to the third antenna ANT3; wherein, the first switch unit 130 further includes a first end connected to the other second end of the second switch unit 530, wherein the first switch The unit 130 is also configured to selectively turn on the paths between the sixth power amplifier 520 and the second antenna ANT2 and the third antenna ANT3 respectively. Specifically, the first switch unit 130 may be a single-pole three-throw switch, and the second switch may be a double-pole double-throw switch. It should be noted that the first switch unit 130 and the second switch unit 530 can also be composed of a plurality of switches. Further qualification.

Please continue to refer to FIG. 16 , in one embodiment, the second transmitting module 50 further includes a fourth filtering unit 540 and a fifth filtering unit 550 . Wherein, the fourth filter unit 540 is respectively connected to the output terminal of the fifth power amplifier 510 and the second switch unit 530 for filtering the low-frequency signal of the first standard. Specifically, the fifth filtering unit 550 may be a low-frequency filter, which only allows low-frequency signals in a preset frequency band to pass through, and can filter out various harmonics generated by the fifth power amplifier 510 during amplifying signals.

The fifth filter unit 550 is respectively connected to the output terminal of the sixth power amplifier 520 and the second switch unit 530 for filtering the radio frequency signal of the second standard. Specifically, the sixth filtering unit can be a low-intermediate frequency filter, which only allows low and intermediate frequency signals in a preset frequency band to pass through, and can filter out various harmonics generated by the sixth power amplifier 520 in the process of amplifying signals. Wherein, the working frequency range of the high-frequency signal of the second standard is the same as the working frequency range of the intermediate-frequency signal of the first standard.

The transmission path of the low-frequency signal of the second standard:

The radio frequency transceiver 20→the sixth power amplifier 520 of the first transmitting module 110→the fifth filter unit 550→the second switch unit 530→the third antenna ANT3.

The transmission path of the high-frequency signal of the second standard:

RF transceiver 20→sixth power amplifier 520 of the first transmitting module 110→fifth filter unit 550→second switch unit 530→first switch unit 130→first output port OUTPUT1→second antenna ANT2.

In the embodiment of this application, the radio frequency system processing can support the transmission processing of the radio frequency signal of the first standard, and by using the first power supply module to supply power to the multiple first power amplifiers in the first transmission module, On the basis of the power supply voltage of the power amplifier, the power output capability of the first power amplifier is improved by increasing the number of the first power amplifier, the power distribution unit and the power combination unit, so that the power output capability can meet the power level requirement of PC2. Therefore, the operating voltage of the first power amplifier can be reduced from 4.5-5.0V to about 3.4V, thereby avoiding the need to increase the output power of the radio frequency transmitting module by using a high-cost boost Buck-Boost power supply in the related art. The solution can reduce the cost, improve the heat dissipation environment of the power amplifier, reduce the impedance transformation ratio of the matching network, reduce the loss of the matching network, and improve the power output capability of the first power amplifier. At the same time, the radio frequency system can also support the transmission and processing of radio frequency signals of the second standard, which can expand the frequency range of the radio frequency system to transmit signals, increase the types of services that the radio frequency system can support, and be applicable to more communication scenarios.

Further, in the radio frequency system, by setting two antennas, the second antenna ANT2 is used to support the transmission and reception of low-frequency signals of the first standard and the second standard, and the third antenna ANT3 is used to transmit and receive medium and high-frequency signals of the first standard , and the transmission of the high-frequency signal of the second standard. Generally, the narrower the operating frequency band of the antenna, the higher the efficiency of the antenna. In this embodiment, the high-frequency signal of the second standard can be switched by the second switch unit 530 and the first switch unit 130, and then radiated by the second antenna ANT2 To free space, this is about 30% more efficient than using one antenna to support the low-frequency, intermediate-frequency, and high-frequency full-band antennas of the first standard and the second standard, which can improve the communication performance of the high-frequency signal of the second standard , and then improve the communication performance of the radio frequency system.

The embodiment of the present application also provides a communication device. In one of the embodiments, the communication device may include the radio frequency system in any of the foregoing embodiments.

The above-mentioned communication device, by using the first power supply module to supply power to a plurality of first power amplifiers in the first transmitting module, can increase the number and power of the first power amplifiers without increasing the power supply voltage of the power amplifiers. The distribution unit and the power combining unit are used to increase the power output capability of the first power amplifier, so that the power output capability can meet the power level requirement of PC2. Therefore, the operating voltage of the first power amplifier can be reduced from 4.5-5.0V to about 3.4V, thereby avoiding the need to increase the output power of the radio frequency transmitting module by using a high-cost boost Buck-Boost power supply in the related art. The solution can reduce the cost, improve the heat dissipation environment of the power amplifier, reduce the impedance transformation ratio of the matching network, reduce the loss of the matching network, and improve the power output capability of the first power amplifier.

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

The above embodiments only express several implementation modes of the embodiments of the present application, and the descriptions thereof are relatively specific and detailed, but should not be construed as limiting the scope of the patent for the invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the embodiments of the present application, and these all belong to the protection scope of the embodiments of the present application. Therefore, the scope of protection of the embodiment patent of this application should be based on the appended claims.

Claims

A radio frequency transmitting module, comprising:

a first power module, configured to provide a preset power supply voltage;

The first transmitting module is configured with a power port connected to the first power module, a first input port used to connect to the radio frequency transceiver, and a first output port used to connect to the antenna, wherein the first transmitting module Also includes:

A power distribution unit, the input end of the power distribution unit is connected to the first input port, and is used to perform power distribution processing on the received high-frequency signal of the first standard;

A plurality of first power amplifiers, the input ends of the plurality of first power amplifiers are respectively connected to the plurality of output ends of the power distribution unit in one-to-one correspondence, and the power supply ends of the plurality of first power amplifiers are respectively connected to the plurality of output ends of the power distribution unit. The power port is connected, and the first power amplifier is used to amplify the power of the high-frequency signal under the action of the power supply voltage;

A power combining unit, the plurality of input ends of the power combining unit are respectively connected to the output ends of a plurality of first power amplifiers in one-to-one correspondence, and the output ends of the first power combining unit are connected to the first output port, using Combining output powers of multiple first power amplifiers to output high frequency signals with target power.
The radio frequency transmitting module according to claim 1, wherein the first transmitting module is configured with a second input port for connecting with a radio frequency transceiver, wherein the first transmitting module further comprises:

The second power amplifier, the input end of the second power amplifier is connected to the second input port, the power supply end of the second power amplifier is connected to the power port, and the second power amplifier is used for Under the action of the power supply voltage, the power of the received intermediate frequency signal of the first standard is amplified;

The radio frequency transmitting module also includes:

The first switch unit, the first switch unit includes two first terminals and one second terminal, wherein the two first terminals are respectively connected to the output terminal of the first power amplifier and the output of the second power amplifier The terminals are connected in one-to-one correspondence, and the second terminal of the first switch unit is used to connect with the antenna, and is used to selectively conduct the path between the first power amplifier or the second power amplifier and the antenna .
The radio frequency transmitting module according to claim 2, wherein the radio frequency transmitting module further comprises:

a first filtering unit connected to the output end of the power combining unit and the first switching unit respectively, and used to filter the high-frequency signal;

The second filter unit is respectively connected to the output terminal of the second power amplifier and the first switch unit, and is used for filtering the intermediate frequency signal.
The radio frequency transmitting module according to claim 3, wherein the first switching unit, the first filtering unit and the second filtering unit are all integrated in the first transmitting module.
The radio frequency transmitting module according to claim 3, wherein, the first switching unit, the first filtering unit, and the second filtering unit are all external to the first transmitting module.
The radio frequency transmitting module according to claim 2 or 3, wherein the first transmitting module is configured with a third input port for connecting with a radio frequency transceiver, wherein the first transmitting module further comprises:

The third power amplifier, the input terminal of the third power amplifier is connected to the third input port, the power supply terminal of the third power amplifier is connected to the first power module, and is used for the action of the power supply voltage Next, power amplification is performed on the received low-frequency signal of the first standard;

The first switch unit also includes a second terminal for connecting to the output terminal of the third power amplifier, and the switch unit is used for selectively conducting the first power amplifier, the second power amplifier, and the third power amplifier. path between any one of the power amplifiers and the antenna.
The radio frequency transmitting module according to claim 6, wherein the radio frequency transmitting module further comprises:

The third filter unit is connected to the output terminal of the third power amplifier and the switch unit respectively, and is used for filtering the low-frequency signal.
The radio frequency transmitting module according to claim 7, wherein the third filtering unit is externally installed in the first transmitting module.
The radio frequency transmitting module according to claim 1, wherein the first power supply module is a step-down power supply, and the preset supply voltage is less than 4.2 volts.
The radio frequency transmitting module according to claim 1, wherein the power distribution unit is configured to perform equal power distribution processing on the received high-frequency signal of the first standard.
A radio frequency system, comprising: a radio frequency transceiver, a first antenna, and the radio frequency transmitting module according to any one of claims 1-8, connected to the radio frequency transceiver.
The radio frequency system according to claim 11, wherein the radio frequency system further comprises:

a second power supply module, configured to provide a power supply voltage;

A fourth power amplifier, the input end of the fourth power amplifier is connected to the radio frequency transceiver, the power supply end of the fourth power amplifier is connected to the second power supply module, and the output end of the fourth power amplifier is connected to the The switch unit in the radio frequency transmission module is connected, and the fourth power amplifier is used to amplify the power of the radio frequency signal of the second standard under the action of the power supply voltage.
The radio frequency system according to claim 11, wherein the radio frequency system further comprises: a second antenna, a third antenna, a second transmitting module, and a third power supply module for providing a power supply voltage, when the radio frequency transmitting module including the first switching unit,

The second transmitting module includes:

A fifth power amplifier, the input terminal of the fifth power amplifier is connected to the radio frequency transceiver, the power supply terminal of the fifth power amplifier is connected to the third power supply module, and is used under the action of the power supply voltage , performing power amplification on the received low-frequency signal of the first standard;

A sixth power amplifier, the input end of the sixth power amplifier is connected to the radio frequency transceiver, the power supply end of the sixth power amplifier is connected to the third power supply module, and is used under the action of the power supply voltage , performing power amplification on the received radio frequency signal of the second standard;

The second switch unit includes two first terminals and two second terminals, wherein the two first terminals are respectively connected to the output terminal of the fifth power amplifier and the output terminal of the sixth power amplifier in a one-to-one correspondence, so A first end of the second switch unit is connected to the third antenna; wherein,

The first switch unit further includes a first terminal connected to the other second terminal of the second switch unit, wherein the first switch unit is also used for selectively conducting the sixth power amplifier and A path between the second antenna and the third antenna.
The radio frequency system according to claim 13, wherein the second transmitting module further comprises:

A fourth filter unit is connected to the output terminal of the fifth power amplifier and the second switch unit respectively, and is used to filter the low-frequency signal of the first standard;

The fifth filter unit is respectively connected to the output terminal of the sixth power amplifier and the second switch unit, and is used for filtering the radio frequency signal of the second standard.
A communication device, comprising: the radio frequency system according to any one of claims 11-14.