CN115102560B

CN115102560B - Radio frequency system and communication equipment

Info

Publication number: CN115102560B
Application number: CN202210718707.0A
Authority: CN
Inventors: 张亭
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2022-06-23
Filing date: 2022-06-23
Publication date: 2023-12-05
Anticipated expiration: 2042-06-23
Also published as: CN115102560A; WO2023246006A1

Abstract

The application relates to a radio frequency system and communication equipment, which comprises a first filtering module, a second filtering module, a receiving module and a switch module, wherein part of input ends of the receiving module are respectively connected with a plurality of output ends of the first filtering module in a one-to-one correspondence manner to form a plurality of first receiving paths, and the plurality of output ends are respectively connected with a radio frequency transceiver; the first ends of the switch modules are respectively connected with the output ends of the second filter modules in a one-to-one correspondence manner, the second ends of the switch modules are respectively connected with the input ends of the other part of the receiving modules in a one-to-one correspondence manner, and the switch modules are used for gating the second receiving passages between the first ends and the input ends of the targets; the receiving module is used for receiving the radio frequency signals input by the first receiving paths and/or the radio frequency signals received by the second receiving paths. Therefore, the radio frequency system can support the receiving function of various CA+MIMO combinations on the basis of saving cost, reducing the occupied area of devices and reducing the debugging workload of engineers.

Description

Radio frequency system and communication equipment

Technical Field

The present application relates to the field of antenna technologies, and in particular, to a radio frequency system and a communication device.

Background

With the development of radio frequency technology, the application range of LNA (low noise amplifier module) products is becoming wider and wider. However, since the CA and MIMO supported by a single LNA Bank are limited in capability, more discrete LNAs banks are additionally required to implement CA and MIMO functions, thereby increasing costs and the debugging workload of engineers.

Disclosure of Invention

The embodiment of the application provides a radio frequency system and communication equipment, which can reduce cost and reduce debugging workload of engineers.

The first aspect of the present application provides a radio frequency system comprising:

the first filtering module is used for filtering the radio frequency signals from the first antenna to output radio frequency signals with different preset frequency bands;

the second filtering module is used for filtering the radio frequency signals from the second antenna to output radio frequency signals with different preset frequency bands, and the frequency bands of the radio frequency signals output by the second filtering module are the same as the frequency bands of the radio frequency signals output by the first filtering module in a one-to-one correspondence manner;

the receiving module is configured with a plurality of input ends and a plurality of output ends, part of the input ends are respectively connected with the plurality of output ends of the first filtering module in a one-to-one correspondence manner to form a plurality of first receiving paths, and the plurality of output ends are respectively connected with the radio frequency transceiver;

The switch module is configured with a plurality of first ends and a plurality of second ends, the first ends are respectively connected with a plurality of output ends of the second filter module in a one-to-one correspondence manner, the second ends are respectively connected with the other part of the input ends of the receiving module in a one-to-one correspondence manner, and the switch module is used for gating a second receiving passage between each first end and the input end of a target;

the receiving module is used for receiving and processing the radio frequency signals input by the first receiving paths and/or the radio frequency signals received by the second receiving paths.

A second aspect of the present application provides a communication device comprising:

a radio frequency system as described above.

The radio frequency system and the communication equipment comprise a first filtering module, a second filtering module, a receiving module and a switch module, wherein the first filtering module is used for filtering radio frequency signals from a first antenna so as to output radio frequency signals with different preset frequency bands; the second filtering module is used for filtering the radio frequency signals from the second antenna so as to output radio frequency signals with different preset frequency bands; the part of input ends of the receiving module are respectively connected with a plurality of output ends of the first filtering module in a one-to-one correspondence manner to form a plurality of first receiving paths, and the plurality of output ends are respectively connected with the radio frequency transceiver; the first ends of the switch modules are respectively connected with the output ends of the second filter modules in a one-to-one correspondence manner, the second ends of the switch modules are respectively connected with the input ends of the other part of the receiving modules in a one-to-one correspondence manner, and the switch modules are used for gating the second receiving passages between the first ends and the input ends of the targets; the receiving module is used for receiving the radio frequency signals input by the first receiving paths and/or the radio frequency signals received by the second receiving paths. Therefore, the radio frequency system can support the receiving function of various CA+MIMO combinations on the basis of greatly saving the cost, reducing the occupied area of devices and reducing the debugging workload of engineers.

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 a block diagram of an RF system according to one embodiment;

FIG. 2 is a second block diagram of an RF system according to an embodiment;

FIG. 3 is a third block diagram of an RF system according to one embodiment;

FIG. 4 is a fourth block diagram of a radio frequency system according to one embodiment;

FIG. 5 is a fifth block diagram of a radio frequency system according to one embodiment;

FIG. 6 is a block diagram of a radio frequency system according to one embodiment;

fig. 7 is a block diagram of a communication device in an embodiment.

Detailed Description

The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.

It will be understood that the terms first, second, etc. as used herein may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another element and should not be construed as indicating or implying a relative importance or 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.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

The radio frequency system 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 communication device is capable of supporting Carrier Aggregation (CA) techniques for a number of different band combinations. The CA technology can aggregate 2-5 member carriers (Component Carrier, CC) together, so that the transmission bandwidth of a signal receiving path is effectively widened, and the transmission rate of signals is improved. The downlink carrier aggregation refers to a transmission mode in which a base station sends a carrier aggregation signal to a communication device, and after receiving the downlink carrier aggregation signal, the communication device may extract the downlink carrier aggregation signal based on a hardware structure in the radio frequency system according to the embodiment, so as to implement receiving processing on signals of each component carrier frequency band.

Fig. 1 is a block diagram of an embodiment of a radio frequency system, referring to fig. 1, in this embodiment, the radio frequency system includes a first filtering module 110, a second filtering module 120, a receiving module 130, and a switching module 140.

A first filtering module 110, configured to perform filtering processing on the radio frequency signal from the first antenna ANT1 to output radio frequency signals with different preset frequency bands; the second filtering module 120 is configured to perform filtering processing on the radio frequency signals from the second antenna ANT2 to output radio frequency signals with different preset frequency bands, where the frequency bands of the plurality of radio frequency signals output by the second filtering module 120 are the same as the frequency bands of the plurality of radio frequency signals output by the first filtering module 110 in a one-to-one correspondence.

The first filtering module 110 receives the radio frequency signal from the first antenna ANT1, extracts radio frequency signals with different preset frequency bands through filtering, and outputs the radio frequency signals to the receiving module 130, so that the receiving module 130 receives the received radio frequency signals; the second filtering module 120 receives the radio frequency signals from the second antenna ANT2, extracts radio frequency signals with different preset frequency bands through filtering, and outputs the radio frequency signals to the receiving module 130 through the switching module 140, so that the receiving module 130 receives the received radio frequency signals.

The first antenna ANT1 and the second antenna ANT2 may support reception and transmission of radio frequency signals in different frequency bands, and the radio frequency signals may be 2G, 3G, 4G, 5G signals, and the like. The first antenna ANT1 and the second antenna ANT2 may simultaneously receive the same downlink carrier aggregation signal, and correspondingly perform filtering processing of a preset frequency band through the first filtering module 110 and the second filtering module 120, so as to extract and output radio frequency signals of a preset frequency band in the downlink carrier aggregation signal, so as to support downlink carrier aggregation of the radio frequency system. The first antenna ANT1 and the second antenna ANT2 may be directional antennas or non-directional antennas. Illustratively, the antennas may be formed using any suitable type of antenna, which is not further limited by the present embodiment.

The combined frequency band of the downlink carrier aggregation may include a combination of a plurality of different frequency bands, for example, an intermediate frequency+intermediate frequency, an intermediate frequency+high frequency, an intermediate frequency+intermediate frequency+low frequency, an intermediate frequency+intermediate frequency+high frequency, and the like. Taking the 4G signal as an example, the combined frequency band of the downlink carrier aggregation may at least include b1+b3, b1+b7, b2+b7, b1+b3+b5, b1+b3+b7, b1+b3+b40, b1+b3+b41; for example, the combined frequency band of the downlink carrier aggregation may include at least n1+n3, n1+n7, n2+n7, n1+n3+n5, n1+n3+n7, n1+n3+n40, n1+n3+n41.

Taking the 4G signal as an example, if the downlink carrier aggregation signal includes any two carrier frequency bands in B1, B3, and B7, the first filtering module 110 and the second filtering module 120 perform extraction of the radio frequency signals in the preset frequency bands through filtering processing, and may correspondingly allow the radio frequency signals in any two different frequency bands in B1, B3, and B7 to be output to the receiving module 130 respectively, so that the radio frequency system can support 2CA or 2CA MIMO (MultipleInput Multiple Output ) processing on the radio frequency signals in any two different frequency bands in B1, B3, and B7; if the downlink carrier aggregation signal includes carrier frequency bands of B1, B3 and B7, the first filtering module 110 and the second filtering module 120 may extract radio frequency signals of a preset frequency band through filtering processing, allow radio frequency signals of three different frequency bands in the carrier frequency bands B1, B3 and B7 to be respectively output to the receiving module 130, and implement 3CA MIMO on radio frequency signals of three different frequency bands in the carrier frequency bands B1, B3 and B7 through the receiving module 130; or only the first filtering module 110 is used to make three frequency bands of the carrier frequency bands B1, B3 and B7 output to the receiving module 130 respectively, so that the radio frequency system can support 3CA processing on the carrier frequency bands B1, B3 and B7, or only the second filtering module 120 and the switching module 140 are used to make three frequency bands of the carrier frequency bands B1, B3 and B7 output to the receiving module 130 respectively, so that the radio frequency system can support 3CA processing on the carrier frequency bands B1, B3 and B7. It can be understood that the number of output ends of the first filtering module 110 and the second filtering module 120 corresponds to the number of component carriers in the downlink carrier signal to be supported, and the filtering frequency band corresponds to the frequency band of the component carriers.

Optionally, the first filtering module 110 and the second filtering module 120 may each include a multiplexer, through which a plurality of radio frequency signals with different preset frequency bands are output; alternatively, the first filtering module 110 and the second filtering module 120 may each include a combination of a plurality of filters and a diplexer, where the first filtering module 110 includes one diplexer and a plurality of filters, for example, a common end of the diplexer is connected to the first antenna ANT1, a plurality of output ends of the diplexer are respectively connected to input ends of the plurality of filters in a one-to-one correspondence manner, and output ends of the filters are connected to the receiving module 130, so that the first filtering module 110 extracts radio frequency signals in a preset frequency band through one diplexer and the plurality of filters. The multiplexer, the filter and the diplexer only allow the radio frequency signals of the preset frequency band to pass, and the filter can be a band-pass filter, a low-pass filter and the like. It will be appreciated that the type of specific components within the first filtering module 110 and the second filtering module 120 may be selected according to actual requirements.

The receiving module 130 is configured with a plurality of input terminals and a plurality of output terminals, wherein part of the input terminals (fig. 1 only shows one of the input terminals, which is only for illustration and not limitation) are respectively connected with the plurality of output terminals of the first filtering module 110 in a one-to-one correspondence manner to form a plurality of first receiving paths, and the plurality of output terminals are respectively connected with the radio frequency transceiver 150; the switch module 140 is configured with a plurality of first ends and a plurality of second ends (fig. 1 shows only one first end and one second end, which are only schematic and not limiting), the plurality of first ends are respectively connected with a plurality of output ends of the second filter module 120 in a one-to-one correspondence manner, the plurality of second ends are respectively connected with another part of input ends (fig. 1 shows only one of the other part of input ends, which are only schematic and not limiting) of the receiving module 130, and the switch module 140 is used for gating a second receiving path between each first end and the input end of the target; the receiving module 130 is configured to receive the radio frequency signals input by each first receiving path and/or the radio frequency signals received by each second receiving path.

Wherein, a part of input ends of the receiving module 130 and a plurality of output ends of the first filtering module 110 form a plurality of first receiving paths in a one-to-one correspondence, so that the receiving module 130 can receive radio frequency signals of different preset frequency bands output by the first filtering module 110 through the first receiving paths; the other part of input ends of the receiving module 130 are connected with a plurality of output ends of the second filtering module 120 through the switching module 140, so that the receiving module 130 can receive radio frequency signals with different preset frequency bands output by the second filtering module 120 through a second receiving path gated by the switching module 140. The receiving module 130 is configured to perform a receiving process on the radio frequency signal input by each first receiving path and/or the radio frequency signal received by each second receiving path, so that the radio frequency system can support one or more receiving process types of 2CA, 2CA MIMO, 3CA and 3CA MIMO.

The first ends of the switch module 140 are respectively connected with the output ends of the second filter module 120 in a one-to-one correspondence manner, the second ends of the switch module 140 are respectively connected with the input ends of the other part of the receiving module 130 in a one-to-one correspondence manner, and the switch module 140 is used for gating the second receiving paths between the first ends and the input ends of the targets, so that the radio frequency signals with different preset frequency bands output by the second filter module 120 are transmitted to the receiving module 130. It can be appreciated that the switch module 140 may gate different second receiving paths according to different receiving processing types, so that radio frequency signals with different preset frequency bands can be transmitted to different amplifying processing paths of the receiving module 130, so as to implement the multiband processing function of the same amplifying processing path. The number of the first ends of the switch module 140 may correspond to the number of the output ends of the second filter module 120, and the number of the second ends of the switch module 140 may be set according to the number of the first ends and the type of the receiving process that the radio frequency system needs to support.

For example, when the radio frequency system needs to support 2CA MIMO receiving processing of radio frequency signals in any two preset frequency bands in the three frequency bands, the output ends of the second filtering module 120 are three, the number of the first ends of the switch module 140 is three, and the number of the second ends is six, the switch module 140 selects two first ends of the target from the three first ends, selects two second ends of the target from the six second ends, and switches on a second receiving path between the first end of the target and the second end of the corresponding target, so that the radio frequency signals in any two preset frequency bands output by the second filtering module 120 can be output to the receiving module 130 through the switched on second receiving paths respectively. At this time, the frequency bands of the two radio frequency signals arbitrarily output by the first filtering module 110 are the same as the frequency bands of the two radio frequency signals arbitrarily output by the second filtering module 120 in a one-to-one correspondence manner.

For example, when the radio frequency system needs to support the 3CA MIMO receiving process of three carrier member frequency bands, the output ends of the second filtering module 120 are three, the number of the first ends of the switch module 140 is three, and the number of the second ends is nine, the switch module 140 selects three first ends of the targets from the three first ends, selects three second ends of the targets from the nine second ends, and switches on a second receiving path between the first ends of the targets and the corresponding second ends of the targets, so that the three preset frequency band radio frequency signals output by the second filtering module 120 can be output to the receiving module 130 through the switched on second receiving paths respectively. At this time, the frequency bands of the three radio frequency signals output by the first filtering module 110 are the same as the frequency bands of the three radio frequency signals output by the second filtering module 120 in a one-to-one correspondence manner.

Taking 2CA MIMO with the radio frequency system needing to support B1+B3+B7 frequency bands in two-to-two combination as an example, in the radio frequency system of the related technology, as a single LNA Bank only supports 3 paths of reception at most, when the 2CA MIMO is realized, a filtering module and the single LNA Bank are needed, and meanwhile, the implementation is realized by using an additional LNA Bank, so that the cost and the debugging workload of engineers are increased. In the radio frequency system according to the embodiment of the present application, the receiving module 130 may be understood as an LNA Bank, and through the mutual cooperation of the first filtering module 110, the second filtering module 120, the switching module 140 and the receiving module 130, only one LNA Bank and the switching module 140 are needed to implement 2CA MIMO of two-by-two combinations of three frequency bands of b1+b3+b7, and compared with the LNA banks with high cost and large occupied area, the switching module 140 has low cost and small occupied area, so that the cost and the occupied area of the device can be greatly saved (the area can be reduced by nearly half) by saving one LNA Bank, and meanwhile, the design of the radio frequency system is simpler, and the debugging workload of engineers is reduced.

The radio frequency system provided in this embodiment includes a first filtering module 110, a second filtering module 120, a receiving module 130, and a switching module 140, where the first filtering module 110 is configured to perform filtering processing on radio frequency signals from a first antenna ANT1 to output radio frequency signals in different preset frequency bands; the second filtering module 120 is configured to receive radio frequency signals of the second antenna ANT2 and select to output radio frequency signals of different preset frequency bands; part of input ends of the receiving module 130 are respectively connected with a plurality of output ends of the first filtering module 110 in a one-to-one correspondence manner to form a plurality of first receiving paths, and the plurality of output ends are respectively connected with the radio frequency transceiver 150; the first ends of the switch module 140 are respectively connected with the output ends of the second filter module 120 in a one-to-one correspondence manner, the second ends of the switch module 140 are respectively connected with the input ends of the other part of the receiving module 130 in a one-to-one correspondence manner, and the switch module 140 is used for gating a second receiving path between each first end and the input end of the target; the receiving module 130 is configured to receive the radio frequency signals input by each first receiving path and/or the radio frequency signals received by each second receiving path. Therefore, the radio frequency system can support the receiving function of multiple CA+MIMO combinations on the basis of greatly saving the cost and the occupied area of devices and reducing the debugging workload of engineers.

Fig. 2 is a second block diagram of a radio frequency system according to an embodiment, referring to fig. 2, in this embodiment, the receiving module 130 includes a plurality of amplifying units 131 (four amplifying units 131 are shown as an example).

The multiple amplifying units 131 are respectively connected with an output end of the first filtering module 110 and at least one second end of the switch module 140 in a one-to-one correspondence manner, wherein the output end of each amplifying unit 131 is used for outputting the amplified radio frequency signal, and the amplifying unit 131 is used for amplifying the target radio frequency signal.

The rf signal of the target includes one of the rf signal input by the first receiving path and the rf signal received by the second receiving path, so that each amplifying unit 131 receives only the rf signal input by one receiving path at the same time, performs low noise amplification processing on the rf signal, and outputs the amplified rf signal to the rf transceiver. Specifically, the plurality of input terminals of each amplifying unit 131 include at least one first input terminal and at least one second input terminal, each first input terminal is configured to be connected to an output terminal of the first filtering module 110, and each second input terminal of each amplifying unit 131 is correspondingly connected to a second terminal of one of the end groups. Thus, each amplifying unit 131 may support receiving the rf signal from the first filtering module 110 through the first receiving path, or may support receiving the rf signal from the second filtering module 120 through the second receiving path, and perform low noise amplification on the rf signal from the first filtering module 110 or the rf signal from the second filtering module 120 under the effect of the path selection of the switching module 140. Alternatively, the amplifying unit 131 may include a radio frequency switch through which the amplifying unit 131 can have a plurality of input terminals and receive a target radio frequency signal through the input terminals, and a low noise amplifier through which the amplifying unit 131 can perform a low noise amplifying process on the input radio frequency signal.

The second ends of the switch module 140 are divided into a plurality of end groups, and the second ends of the same end group are connected to the amplifying units 131 in a one-to-one correspondence manner, and each second end of the same end group is used for supporting transmission of radio frequency signals in the same frequency band. Specifically, the one-to-one correspondence connection of the plurality of second ends in the same end group with the plurality of different amplifying units 131 may be understood as: in the same end group, different second ends are connected with different amplifying units 131, so that a plurality of receiving paths for transmitting radio frequency signals with the same frequency band can be formed between the switch module 140 and the different amplifying units 131; the plurality of second terminals connected to the plurality of input terminals of the same amplifying unit 131 are each from a different terminal group.

Therefore, through the switch module 140 and the plurality of amplifying units 131, the same amplifying unit 131 can only receive the radio frequency signal of one frequency band at the same time, and the plurality of amplifying units 131 can receive the radio frequency signal of the corresponding preset frequency band at the same time, so that the radio frequency system supports multiple CA combination functions, and the control flexibility of the radio frequency system is effectively improved.

Alternatively, in the above embodiment, the switch module 140 may include a plurality of first switch units 141 (please continue to assist with fig. 2, fig. 2 is illustrated by taking three first switch units 141 as an example), each first switch unit 141 is configured with a single first end and at least two second ends (fig. 2 is illustrated by two second ends) that form an end group, and each first switch unit 141 is configured to gate the second receiving path between the first end and one of the at least two second ends.

Specifically, the first end of each first switching unit 141 is used as one first end of the switching module 140 to be connected with one of the output ends of the second filtering module 120, and at least two second ends of each first switching unit 141 form a plurality of second ends of the same end group of the switching module 140 to be connected with a plurality of different amplifying units 131 in a one-to-one correspondence. Each first switch unit 141 is configured to gate a second receiving path between a first end of the unit and a second end of the target of the unit, so as to transmit a radio frequency signal of a corresponding preset frequency band to the corresponding amplifying unit 131 through the second receiving path. Alternatively, the first switching unit 141 may be an SPnT switch, and it is understood that the number of second terminals of the first switching unit 141 may be set according to the type of reception process that the radio frequency system needs to support, for example, when 2CA needs to be supported, the number of second terminals of the first switching unit 141 may be two, and the first switching unit 141 may be an SPDT switch.

At least two different first switch units 141 of the plurality of first switch units 141 may be connected to the same amplifying unit 131, so that the same amplifying unit 131 can support low noise amplification processing on radio frequency signals of different frequency bands at different times; at least two different first switch units 141 of the plurality of first switch units 141 may be connected to different amplifying units 131, so that the plurality of amplifying units 131 can support low noise amplifying processing of radio frequency signals of corresponding frequency bands at the same time. For example, taking fig. 2 as an example, two second ends of each first switch unit 141 are respectively connected to two different amplifying units 131 in the drawing, so that two different amplifying units 131 connected to the same first switch unit 141 can support receiving the radio frequency signal of the preset frequency band transmitted by the same first switch unit 141; each amplifying unit 131 is connected to two or three first switching units 141, respectively, so that each amplifying unit 131 can support receiving radio frequency signals of different preset frequency bands transmitted from the two or three first switching units 141.

Therefore, the radio frequency system can support multiple CA combining functions through the first filtering module 110, the second filtering module 120, the plurality of first switching units 141 and the plurality of amplifying units 131, so as to effectively improve the control flexibility of the radio frequency system.

Optionally, in the foregoing embodiment, the switch module 140 may also include a second switch unit configured with a plurality of first ends and a plurality of second ends, where each first end corresponds to at least two second ends that form the same end group, and the second switch unit is configured to gate a second receiving path between each first end and one of the corresponding at least two second ends. Alternatively, the number of the first terminals and the second terminals of the second switching unit may be set according to the type of reception process that the radio frequency system needs to support, for example, the second switching unit may be a 3P6T switch, so that the second switching unit is provided with three first terminals and six second terminals constituting three terminal groups, each terminal group including two second terminals. Similarly, the radio frequency system can also support multiple CA combining functions through the first filtering module 110, the second filtering module 120, the plurality of second switching units and the plurality of amplifying units 131, so as to effectively improve the control flexibility of the radio frequency system.

Fig. 3 is a third block diagram of a radio frequency system according to an embodiment, referring to fig. 3, in this embodiment, the plurality of amplifying units 131 includes a plurality of middle-high frequency amplifying units 131, and each middle-high frequency amplifying unit 131 is configured to amplify a middle-frequency signal or a high-frequency signal of a target. Thus, the same amplifying unit 131 can realize low noise amplifying processing of the intermediate frequency signal and the high frequency signal at different time, and the multi-frequency band amplifying processing function of the amplifying unit 131 can enable the receiving module 130 to have more receiving processing paths.

In the related art, one LNA Bank is generally configured with only one high frequency amplifying unit 131, one middle and high frequency amplifying unit 131, and two middle and high frequency amplifying units 1311, so that the capability of CA and MIMO supported by the LNA Bank is limited, and when mb+mb 4×4MIMO needs to be supported, the LNA Bank supports at most 3 paths (2 paths MB,1 path MHB), and more discrete LNA banks need to be additionally used. In the present embodiment, the plurality of amplifying units 131 include the plurality of intermediate-high frequency amplifying units 1311, and the reception processing of more paths MB or HB can be simultaneously realized, for example, when four intermediate-high frequency amplifying units 1311 are included, the reception processing of four paths MB or HB can be simultaneously realized using only one LNA bank.

Thus, by providing a plurality of intermediate-high frequency amplifying units 1311, the number of amplifying units 131 can be reduced while realizing more reception processing, the cost can be reduced, the occupied area of the device can be reduced, and miniaturization of the product can be realized.

It should be noted that, in the drawings, only four mid-high frequency amplifying units 1311 are shown, correspondingly, the second ends of the switch modules 140 are six, so that the radio frequency system may implement 2CA, 2CA MIMO and 2CA receiving processes, however, in other embodiments, if the 3CA MIMO receiving processes need to be supported, the number of the mid-high frequency amplifying units 1311 may be increased while the number of the second ends of the switch modules 140 is increased, for example, the number of the mid-high frequency amplifying units 1311 is six, correspondingly, the number of the second ends of the switch modules 140 is nine, the same end group includes three second ends, the three second ends of the same end group are respectively connected with different input ends of different mid-high frequency amplifying units 131, and the same mid-high frequency amplifying units 1311 may be connected with the second ends of different end groups.

Optionally, please continue with auxiliary reference to fig. 3, the receiving module 130 further includes: the third switching unit 132.

The third switch unit 132 is configured with a plurality of third terminals and a plurality of fourth terminals, the plurality of third terminals are connected to the output terminals of the plurality of intermediate-high frequency amplifying units 131 in a one-to-one correspondence manner, the plurality of fourth terminals are respectively connected to the rf transceiver 150, and the third switch unit 132 is configured to gate the output paths between the third terminals and the fourth terminals, so that each output path outputs the amplified rf signal. Alternatively, the third switching unit 132 may be an nPnT switch, and it is understood that the number of the third terminal and the fourth terminal of the third switching unit 132 may be set according to the number of the mid-high frequency amplifying units 131, for example, when the number of the mid-high frequency amplifying units 131 is four, the number of the third terminal and the fourth terminal of the third switching unit 132 may be four, and the third switching unit 132 may be a 4P4T switch.

Through the third switch unit 132, a plurality of switchable output paths can be formed between the plurality of middle-high frequency amplifying units 131 and the radio frequency transceiver, so that radio frequency signals can be output to the radio frequency transceiver through more output paths, and control flexibility of the radio frequency system is effectively improved.

Optionally, the plurality of amplifying units 131 may further include a low-frequency amplifying unit, where the low-frequency amplifying unit is configured to amplify the low-frequency signal of the target, so that the plurality of amplifying units 131 include an amplifying unit that supports low-noise amplifying of the intermediate-frequency signal and the high-frequency signal, and an amplifying unit that supports low-noise amplifying of the low-frequency signal, so as to improve the multiband receiving function of the receiving module 130, and simultaneously enable the radio frequency system to support more CA combinations.

The number of low-frequency amplifying units may be increased according to the type of the reception process to be supported, for example, if the type of the reception process to be supported includes at least two low-frequency signals, the number of the low-frequency amplifying units may be at least two.

Fig. 4 is a block diagram of a radio frequency system according to an embodiment, referring to fig. 4 (in fig. 4, the switch module 140 includes three first switch units 141, and each first switch unit 141 is an SPDT switch, and the receiving module 130 includes five amplifying units 131 and one second switch unit for illustration), in this embodiment, each amplifying unit 131 includes: radio frequency switches (e.g., SP3T switch, SP4T switch, SP5T switch in fig. 4) and low noise amplifiers (e.g., MHB1, MHB2, MHB3, MHB4, LB1 in fig. 4).

The radio frequency switch is configured with at most a first input end, at least a second input end and a single output end, and is used for gating an input path between a target input end and the output end, wherein the target input end comprises one of the first input end and the second input end.

The input path between each low noise amplifier and the first receiving path or the input path between each low noise amplifier and the second receiving path can be gated by the radio frequency switch, so that each low noise amplifier performs low noise amplification processing on the input radio frequency signal. Alternatively, the rf switch may be a single pole multi-throw switch, for example, as shown in fig. 4, the rf switch may be an SP3T switch, an SP4T switch, or an SP5T switch, where it is understood that the number of input ends and output ends of the rf switch may be set according to practical application requirements, and in other embodiments, the rf switch may be configured with other numbers of first input ends and second input ends, so as to have a selection function of more input paths.

The low-noise amplifier is used for receiving the radio frequency signal transmitted by the input channel and performing low-noise amplification on the radio frequency signal.

The low-noise amplifier can amplify the effective signal on the premise of not increasing noise, so that the signal-to-noise ratio of the received radio frequency signal is improved, and the signal processing quality of a radio frequency system is further improved. Alternatively, when the amplifying unit 131 is the medium-high frequency amplifying unit 1311, the low noise amplifier may be a medium-high frequency low noise amplifier (such as MHB1, MHB2, MHB3, MHB4 in fig. 4) to support low noise amplifying processing of one of the input intermediate frequency signal and high frequency signal; when the amplifying unit 131 is the low frequency amplifying unit 1312, the low noise amplifier may be a low frequency low noise amplifier (such as LB1 in fig. 4) to support a low noise amplifying process of the input low frequency signal.

It will be appreciated that in other embodiments, the amplifying unit 131 may also include other functional devices to implement a richer signal receiving function. In the embodiments of the present application, the amplifying unit 131 includes a radio frequency switch and a low noise amplifier.

Optionally, please continue to assist with fig. 4, the first filtering module 110 includes a first triplexer, wherein a common input end of the first triplexer is connected to the first antenna ANT1, and three output ends of the first triplexer are respectively connected to three output ends of the receiving module 130 in a one-to-one correspondence manner; the second filtering module 120 includes a second triplexer, wherein a common input terminal of the second triplexer is connected to the second antenna ANT2, and three output terminals of the second triplexer are respectively connected to three first terminals of the switch module 140 in a one-to-one correspondence manner.

Specifically, the frequency bands of the radio frequency signals output by the three output ends of the first triplexer and the three output ends of the second triplexer are the same in a one-to-one correspondence manner, so that the first filtering module 110 and the second filtering module 120 can support the extraction and output of radio frequency signals of any two different frequency bands in three different frequency bands, and the radio frequency system can support 2CA or 2CA MIMO of radio frequency signals of any two different frequency bands in B1, B3 and B7; the method can also support the extraction and output of three different carrier frequency bands, so that the radio frequency system can support the 3CA receiving processing of the carrier frequency bands B1, B3 and B7; or by increasing the number of amplifying units 131 and the number of second terminals of the switching module 140 in fig. 4, the 3CA MIMO process may also be implemented.

It can be appreciated that, in other embodiments, the types of the internal devices of the first filtering module 110 and the second filtering module 120 may be selected according to the types of the receiving processes that need to be supported, and detailed descriptions in the above embodiments are specifically referred to, and are not repeated herein.

Fig. 5 is a fifth block diagram of the radio frequency system according to an embodiment, fig. 6 is a sixth block diagram of the radio frequency system according to an embodiment, referring to fig. 5 and fig. 6 (fig. 5 and fig. 6 are schematic based on the embodiment shown IN fig. 4, fig. 6 is also schematic showing a low frequency amplifying unit 1312), the receiving module 130 is configured with a plurality of first input ports (fig. 5 and fig. 6 are schematic using three first input ports such as IN1, IN2 and IN3 IN the figure), a plurality of second input ports (fig. 5 and fig. 6 are schematic using three second input ports such as IN4, IN5 and IN6 IN the figure), and a plurality of output ports (fig. 5 and fig. 6 are schematic using five output ports such as OUT-LB, OUT-MHB1, OUT-MHB3 and OUT-MHB4 IN the figure), the plurality of first input ports are respectively connected to the plurality of output ports of the first filter module 110, the plurality of second input ports are respectively connected to the plurality of output ports of the transceiver modules 150 one by one respectively; the switch module 140 is integrated in the receiving module 130, and a plurality of first ends of the switch module 140 are respectively connected to a plurality of output ends of the second filtering module 120 in a one-to-one correspondence manner through a plurality of second input ports.

The descriptions of the first filtering module 110, the second filtering module 120, the switching module 140 and the receiving module 130 are referred to the descriptions of the above embodiments, and are not repeated here.

By integrating the receiving module 130 and the switch module 140 in the above embodiment into one device, a new LNA bank is formed, and the area of the LNA bank can be kept the same as the area of the receiving module 130 before being integrated, so that all the functions in fig. 1-4 are realized, and meanwhile, the device of the switch module 140 hung on the outside can be saved, and the hardware cost is further reduced. Meanwhile, the LNA bank after integration further reduces the design complexity of the scheme and reduces the debugging work of engineers.

In the above embodiments, the number of antennas, the first filtering module 110, the second filtering module 120, the receiving module 130, and the switching module 140 may be set according to the MIMO type to be supported by the radio frequency system. For example, in the above embodiment, if the radio frequency system needs to support 2×2mimo (2 CA MIMO in the above embodiment can be understood as 2ca+2×2mimo), the number of required antennas is at least two (i.e. the first antenna ANT1 and the second antenna ANT 2), and the number of the first filtering module 110, the second filtering module 120, the receiving module 130 and the switching module 140 are respectively one; if the rf system needs to support 4×4mimo, the number of antennas is at least four, and the number of the first filtering module 110, the second filtering module 120, the receiving module 130, and the switching module 140 is two.

It will be appreciated that, in the above embodiment, only the circuits related to the receiving function of the rf system are shown, but at least one transmitting circuit may be disposed in the rf system according to practical application requirements, so as to support the transmitting function of the rf signal of the rf system.

Based on the radio frequency system shown in fig. 6, taking the radio frequency system as an example, the diversity 2CA MIMO function capable of supporting the combination of the three frequency bands of b1+b3+b7, the working principle of the radio frequency system is specifically analyzed.

2CA MIMO supporting b1+b3:

one downlink carrier aggregation signal enters the first triplexer through the first antenna ANT1 and then enters the receiving module 130. Wherein the B1 DRx signal enters the SP3T switch and the MHB1 path; b3 The DRx signal enters an SP4T switch and an MHB2 path; finally, the signal is output by the second switch unit and enters the radio frequency transceiver for demodulation; the other path of signals enter a second triplexer through a second antenna ANT2, wherein B1 DRx MIMO signals enter through a 1 port of an SPDT3, are output from a 3 port of an SPDT3 switch, and enter an MHB4 path through an SP4T switch; b3 DRx MIMO signals enter through a 1 port of the SPDT2, are output from a 3 port of the SPDT2 switch, and enter into an MHB3 path through the SP4T switch; finally, the signal is output through a second switch unit (actually a 4P4T switch) and enters a radio frequency transceiver for demodulation.

2CA MIMO supporting b1+b7:

one downlink carrier aggregation signal enters the first triplexer through the first antenna ANT1 and then enters the receiving module 130. Wherein the B1 DRx signal enters the SP3T switch and the MHB1 path; b7 The DRx signal enters an SP4T switch and an MHB4 path; finally, the signal is output by the second switch unit and enters the radio frequency transceiver for demodulation; the other signal enters the second triplexer through the second antenna ANT 2. The B1 DRx MIMO signal enters through the 1 port of the SPDT3, is output from the 2 port of the SPDT3 switch, and enters into the MHB3 path through the SP4T switch; b7 DRx MIMO signals enter through a 1 port of the SPDT1, are output from a 3 port of the SPDT1 switch, and enter into an MHB2 path through the SP4T switch; finally, the signal is output by the second switch unit and enters the radio frequency transceiver for demodulation.

2CA MIMO supporting b3+b7:

one downlink carrier aggregation signal enters the first triplexer through the first antenna ANT1 and then enters the receiving module 130. Wherein the B3 DRx signal enters the SP4T switch and the MHB2 path; b7 The DRx signal enters an SP4T switch and an MHB4 path; finally, the signal is output by the second switch unit and enters the radio frequency transceiver for demodulation; the other signal enters the second triplexer through the second antenna ANT 2. The B3 DRx MIMO signal enters through the 1 port of the SPDT2, is output from the 3 port of the SPDT2 switch, and enters into the MHB3 path through the SP4T switch; b7 DRx MIMO signals enter through a 1 port of the SPDT1, are output from a 2 port of the SPDT1 switch, and enter into an MHB1 path through the SP4T switch; finally, the signal is output by the second switch unit and enters the radio frequency transceiver for demodulation.

Based on the radio frequency system shown in fig. 6, taking the radio frequency system capable of supporting the 3CA function of the three frequency bands of b1+b3+b7 as an example, the working principle of the radio frequency system is specifically analyzed.

One path of downlink carrier aggregation signal enters a first triplexer through a first antenna ANT1 and then enters a receiving module 130, wherein a B1 DRx signal enters an SP3T switch and an MHB1 path; b3 The DRx signal enters an SP4T switch and an MHB2 path; b7 The DRx signal enters an SP4T switch and an MHB4 path; finally, the signal is output by the second switch unit and enters the radio frequency transceiver for demodulation; or, one path of downlink carrier aggregation signal enters the second triplexer through the second antenna ANT2, and then enters the receiving module 130 through each first switch unit 141, wherein the B1 DRx signal enters the SP4T switch and the MHB3 path through the 2 port of the SPDT 3; b3 The DRx signal enters an SP4T switch through a 2 port of the SPDT2 and an MHB2 path; b7 The DRx signal enters an SP3T switch through a 2 port of the SPDT1 and an MHB1 path; finally, the signal is output by the second switch unit and enters the radio frequency transceiver for demodulation.

The application also provides a communication device which comprises the radio frequency system in the embodiment, and can support the receiving function of various CA+MIMO combinations on the basis of greatly saving the cost and the occupied area of devices and reducing the debugging workload of engineers.

As further illustrated in fig. 7, the above-mentioned communication device is exemplified as the mobile phone 11, and in particular, as illustrated in fig. 7, the mobile phone 11 may include a memory 21 (which optionally includes one or more computer readable storage media), a processor 22, a peripheral interface 23, a radio frequency system 24 of the above-mentioned embodiment, and an input/output (I/O) subsystem 26. These components optionally communicate via one or more communication buses or signal lines 29. Those skilled in the art will appreciate that the handset 11 shown in fig. 7 is not limiting and may include more or fewer components than shown, or may combine certain components, or a different arrangement of components. The various components shown in fig. 7 are implemented in hardware, software, or a combination of both hardware and software, including one or more signal processing and/or application specific integrated circuits.

Memory 21 optionally includes high-speed random access memory, and also optionally includes non-volatile memory, such as one or more magnetic disk storage devices, flash memory devices, or other non-volatile solid-state memory devices. Illustratively, the software components stored in the memory 21 include an operating system 211, a communication module (or instruction set) 212, a Global Positioning System (GPS) module (or instruction set) 213, and the like.

The processor 22 and other control circuitry, such as control circuitry in the radio frequency system 24, may be used to control the operation of the handset 11. The processor 22 may be based on one or more microprocessors, microcontrollers, digital signal processors, baseband processors, power management units, audio codec chips, application specific integrated circuits, and the like.

The processor 22 may be configured to implement a control algorithm that controls the use of the antenna in the handset 11. The processor 22 may also issue control commands or the like for controlling the various switches in the radio frequency system 24.

The I/O subsystem 26 couples input/output peripheral devices on the handset 11, such as keypads and other input control devices, to the peripheral interface 23. The I/O subsystem 26 optionally includes a touch screen, keys, tone generator, accelerometer (motion sensor), ambient light sensor and other sensors, light emitting diodes, and other status indicators, data ports, etc. Illustratively, a user may control the operation of the handset 11 by supplying commands via the I/O subsystem 26, and may use the output resources of the I/O subsystem 26 to receive status information and other outputs from the handset 11. For example, a user may activate the handset or deactivate the handset by pressing button 261.

Any reference to memory, storage, database, or other medium used in the present application may include non-volatile and/or volatile memory. Suitable nonvolatile memory can include Read Only Memory (ROM), programmable ROM (PROM), electrically Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include random access memory (RM), which acts as external cache memory. By way of illustration and not limitation, RMs are available in a variety of forms, such as Static RMs (SRMs), dynamic RMs (DRMs), synchronous DRMs (SDRMs), double data rates SDRM (DDR SDRM), enhanced SDRMs (ESDRMs), synchronous link (synchronous) DRMs (SLDRMs), memory bus (Rmbus) direct RMs (RDRMs), direct memory bus dynamic RMs (DRDRMs), and memory bus dynamic RMs (RDRMs).

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

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 system, comprising:

the first filtering module is used for filtering the carrier aggregation signals from the first antenna so as to extract and output radio frequency signals with different preset frequency bands;

the second filtering module is used for filtering the carrier aggregation signals from the second antenna so as to extract and output radio frequency signals with different preset frequency bands, and the frequency bands of the plurality of radio frequency signals output by the second filtering module are the same as the frequency bands of the plurality of radio frequency signals output by the first filtering module in a one-to-one correspondence manner;

the radio frequency receiving module is configured with a plurality of input ends and a plurality of output ends, part of the input ends are respectively connected with the plurality of output ends of the first filtering module in a one-to-one correspondence manner to form a plurality of first receiving paths, and the plurality of output ends are respectively connected with the radio frequency transceiver;

the switch module is configured with a plurality of first ends and a plurality of second ends, the first ends are respectively connected with a plurality of output ends of the second filter module in a one-to-one correspondence manner, the second ends are respectively connected with the other part of the input ends of the radio frequency receiving module in a one-to-one correspondence manner, and the switch module is used for gating a second receiving passage between each first end and the input end of a target;

The radio frequency receiving module is used for receiving and processing radio frequency signals input by the first receiving paths and/or radio frequency signals received by the second receiving paths so as to support downlink carrier aggregation communication.

2. The radio frequency system of claim 1, wherein the radio frequency receiving module comprises:

the input ends of the amplifying units are respectively connected with one output end of the first filtering module and at least one second end of the switch module in a one-to-one correspondence manner, the output end of each amplifying unit is used for outputting an amplified radio frequency signal, and the amplifying unit is used for amplifying a target radio frequency signal; the radio frequency signal of the target comprises one of the radio frequency signal input by the first receiving path and the radio frequency signal received by the second receiving path;

the second ends of the switch module are divided into a plurality of end groups, the second ends in the same end group are connected with a plurality of different amplifying units in a one-to-one correspondence mode, and each second end in the same end group is used for supporting transmission of radio frequency signals with the same frequency band.

3. The radio frequency system of claim 2, wherein the switch module comprises:

a plurality of first switching units, each configured with a single one of the first terminals and at least two of the second terminals constituting one of the terminal groups, each for gating the second reception path between the first terminal and one of the at least two second terminals; or alternatively

And a second switching unit configured with a plurality of the first ends and a plurality of the second ends, each of the first ends corresponding to at least two of the second ends constituting the same end group, the second switching unit being configured to gate the second receiving path between each of the first ends and one of the corresponding at least two of the second ends.

4. The radio frequency system according to claim 2, wherein the plurality of amplifying units includes a plurality of intermediate-high frequency amplifying units, each of which is configured to amplify an intermediate-frequency signal or a high-frequency signal of a target.

5. The radio frequency system of claim 4, wherein the radio frequency receiving module further comprises:

the third switch unit is configured with a plurality of third ends and a plurality of fourth ends, the third ends are connected with the output ends of the middle-high frequency amplifying units in a one-to-one correspondence mode, the fourth ends are respectively connected with the radio frequency transceiver, and the third switch unit is used for gating output channels between the third ends and the fourth ends so that the output channels output amplified radio frequency signals.

6. The radio frequency system according to claim 4, wherein the plurality of amplifying units further comprises a low frequency amplifying unit for amplifying the low frequency signal of the object.

7. The radio frequency system according to any one of claims 2 to 6, wherein the radio frequency receiving module is configured with a plurality of first input ports, a plurality of second input ports, and a plurality of output ports, the plurality of first input ports are respectively connected with the plurality of output ports of the first filtering module in one-to-one correspondence, the plurality of second input ports are respectively connected with the plurality of output ports of the second filtering module in one-to-one correspondence, and the plurality of output ports are respectively connected with the radio frequency transceiver;

the switch module is integrated in the radio frequency receiving module, and a plurality of first ends of the switch module are respectively connected with a plurality of output ends of the second filter module in a one-to-one correspondence manner through a plurality of second input ports.

8. The radio frequency system according to any of claims 2-6, wherein the plurality of inputs of each of the amplifying units comprises at least one more first input and at least one more second input; the amplifying unit includes:

A radio frequency switch configured with at most one first input terminal, at least one second input terminal and a single output terminal, wherein each first input terminal is used for being connected with one output terminal of the first filtering module, each second input terminal in each radio frequency switch is correspondingly connected with one second terminal in one terminal group, the radio frequency switch is used for gating an input path between a target input terminal and the output terminal, and the target input terminal comprises one of the first input terminal and the second input terminal;

the input end of the low-noise amplifier is connected with the output end of the radio frequency switch, the output end of the low-noise amplifier is used for outputting the radio frequency signal after amplification treatment, and the low-noise amplifier is used for receiving the radio frequency signal transmitted by the input channel and carrying out low-noise amplification treatment on the radio frequency signal.

9. The radio frequency system according to any one of claims 2-6, wherein the first filtering module comprises a first triplexer, a common input end of the first triplexer is connected with the first antenna, and three output ends of the first triplexer are respectively connected with three output ends of the radio frequency receiving module in a one-to-one correspondence manner; the second filtering module comprises a second triplexer, wherein the common input end of the second triplexer is connected with the second antenna, and the three output ends of the second triplexer are respectively connected with the three first ends of the switch module in a one-to-one correspondence manner.

10. A communication device, comprising:

the radio frequency system of any of claims 1-9.