CN220475778U

CN220475778U - 5G product radio frequency front-end system based on traditional radio frequency device

Info

Publication number: CN220475778U
Application number: CN202321933857.XU
Authority: CN
Inventors: 王新; 王斌坚
Original assignee: Shenzhen Xun Rui Communication Co ltd
Current assignee: Shenzhen Xun Rui Communication Co ltd
Priority date: 2023-07-21
Filing date: 2023-07-21
Publication date: 2024-02-09
Anticipated expiration: 2033-07-21

Abstract

The utility model provides a 5G product radio frequency front-end system realized based on a traditional radio frequency device, and belongs to the technical field of 5G. The utility model discloses a 5G product radio frequency front end system realized based on a traditional radio frequency device, which comprises a front end module FEM provided with a double antenna port, a radio frequency switch and a coupler, wherein the front end module FEM is provided with two middle main set first links and main set second links which are respectively connected with the radio frequency switch, the front end module FEM is provided with a first detection link which is connected with a radio frequency processor and is used for detecting the transmitting power of one link, the other link of the front end module FEM is provided with the coupler, and the coupler is provided with a second detection link which is connected with the radio frequency processor and is used for detecting the transmitting power of the link. The beneficial effects of the utility model are as follows: the system has the advantages that the cost is as low as possible, the initiative of the supply chain end is realized, meanwhile, the system can be flexibly designed and realized to contain various ENDC combinations, and the competitiveness of the product is improved.

Description

5G product radio frequency front-end system based on traditional radio frequency device

Technical Field

The utility model relates to the technical field of 5G, in particular to a 5G product radio frequency front-end system realized based on a traditional radio frequency device.

Background

The current mobile communication 5G networking technology comprises two networking architectures of SA (independent networking) and NSA (non-independent networking), with the further development and popularization of the global 5G technology, 5G products are increasingly combining ENDCs supported under NSA, under the opening 3 series of non-independent (NSA) networking architecture, a 5G base station interfacing with a 4G core network is called en-gNB, and the architecture is called ENDC (eNB NR Dual Connection) because the architecture is a dual-connection (DC) of 4G eNB (E) and 5G NR (N), and 4G eNB is an anchor point.

The front-end module FEM is an indispensable device which is suitable for meeting the requirement of supporting various ENDC combinations under NSA, and has the defects of high price, low popularity, limited adaptation degree and the like because the device needs to be redeveloped based on a 5G technology, and if the design of the radio-frequency front-end of a 5G product containing various ENDC combinations can be realized on the basis of the traditional radio-frequency device, the existing mature device can be utilized to overcome the defects to the greatest extent, and the product competitiveness is improved.

Disclosure of Invention

In order to solve the problems in the prior art, the utility model provides a 5G product radio frequency front-end system realized based on a traditional radio frequency device.

The utility model discloses a 5G product radio frequency front end system realized based on a traditional radio frequency device, which comprises a front end module FEM provided with double antenna ports, a radio frequency switch and a coupler, wherein the front end module FEM is provided with two middle main set first links and main set second links which are respectively connected with the radio frequency switch, the front end module FEM is provided with a first detection link which is connected with a radio frequency processor and is used for detecting the transmitting power of one link, the other link of the front end module FEM is provided with the coupler, and the coupler is provided with a second detection link which is connected with the radio frequency processor and is used for detecting the transmitting power of the link.

Further, the 5G product radio frequency front end system is also provided with a diversity receiving link, a frequency dividing module is arranged on the diversity receiving link, and the signal input end of the frequency dividing module is connected with the signal output end of the radio frequency switch.

Further, the other end of the frequency dividing module, which is opposite to the radio frequency switch, is provided with a first output port and a second output port which are respectively connected with a radio frequency processor, and the radio frequency processor respectively constructs a diversity first acquisition link and a diversity second acquisition link through the first output port and the second output port.

Further, the frequency dividing module includes a combiner U2312, where the combiner U2312 is provided with an input pin COM, a first output pin HB and a second output pin LB.

Further, the frequency dividing module further comprises a switch unit, the switch unit is provided with a group of input ends and a plurality of groups of output ends, the group of input ends are respectively connected with two output pins of the combiner U2312, and the plurality of groups of output ends are respectively connected with the radio frequency processor.

Further, the radio frequency switch is connected with more than two antennas and is used for flexibly selecting a receiving antenna or a transmitting antenna.

Further, the number of the antennas is 3, the radio frequency switch adopts a 3P3T radio frequency switch, and the transmission and the reception of the primary set first link, the transmission and the reception of the primary set second link and the diversity reception are flexibly distributed to three antennas through the 3P3T radio frequency switch.

Further, the primary set first link is a primary set high-frequency link, the primary set second link is a primary set low-frequency link, the front end module FEM builds the primary set high-frequency link through an ant_mhb pin, and builds the primary set low-frequency link through an ant_lb pin, and the coupler is arranged on the primary set low-frequency link.

Further, the device also comprises a filtering module, wherein the filtering module is arranged between the signal output ends of the main set first link and the main set second link and the radio frequency switch signal input end.

Further, the filtering module includes a filter U2230 and a filter U2231, where an input end of the filter U2230 is connected to the ant_mhb pin of the front end module FEM, an output end of the filter U2230 is connected to the radio frequency switch, an input end of the filter U2231 is connected to the ant_lb pin of the front end module FEM through a coupler, and an output end of the filter U2231 is connected to the radio frequency switch.

Compared with the prior art, the utility model has the beneficial effects that: the radio frequency device is a traditional radio frequency device, on one hand, the material selection of a supply chain is active, and on the other hand, the frequency band detached by the radio frequency switch can reduce the debugging difficulty of the antenna at the whole machine end. The cost is as low as possible without re-research and development, the active supply chain end can be realized, meanwhile, the multiple ENDC combinations can be flexibly designed and realized, and the competitiveness of the product is improved.

Drawings

In order to more clearly illustrate the utility model or the solutions of the prior art, a brief description will be given below of the drawings used in the description of the embodiments or the prior art, it being obvious that the drawings in the description below are some embodiments of the utility model and that other drawings can be obtained from them without inventive effort for a person skilled in the art.

FIG. 1 is a block diagram of an embodiment of the present utility model;

FIG. 2 is a schematic circuit diagram of an embodiment of the front end module FEM and coupler of the present utility model;

FIG. 3 is a schematic circuit diagram of an embodiment of a radio frequency switch;

fig. 4 is a schematic diagram of a frequency division module circuit.

Detailed Description

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs; the terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model; the terms "comprising" and "having" and any variations thereof in the description of the utility model and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion. The terms first, second and the like in the description and in the claims or in the above-described figures, are used for distinguishing between different objects and not necessarily for describing a sequential or chronological order.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the utility model. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the described embodiments of the utility model may be combined with other embodiments.

In order to enable those skilled in the art to better understand the present utility model, a technical solution in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings.

As shown in fig. 1, as an embodiment of the present utility model, a 5G product rf front-end system implemented based on a conventional rf device includes a front-end module FEM with dual antenna ports, an rf switch, and a coupler, where the front-end module FEM is provided with two middle main concentrated high-frequency links ant_mh Band and a main concentrated low-frequency link ant_lband respectively connected to the rf switch, the front-end module FEM is provided with a first detection link cpl_mh Band connected to an rf processor and used for detecting the transmitting power of the main concentrated high-frequency link ant_mh Band, and the main concentrated low-frequency link ant_l Band of the front-end module FEM is provided with a coupler, and the coupler is provided with a second detection link cpl_l Band connected to the rf processor and used for detecting the transmitting power of the link.

The system adopts a device which is different from a High-integration device to design a 5G product radio frequency, utilizes Dual ant port Front End Module (dual-antenna port FEM), a radio frequency combiner, a radio frequency switch, a radio frequency coupler and the like to build a radio frequency link, and realizes uplink ENDC combination between frequency bands with wider intervals of low+middle Band and low+high Band under Sub 3GHz frequency. The scheme has the advantages that on one hand, the material selection of the supply chain is active, and on the other hand, the debugging difficulty of the antenna at the whole machine end can be reduced by utilizing the frequency band (high frequency) detached by the radio frequency switch. Therefore, in one set of design, the cost is as low as possible, the supply chain end initiative is realized, meanwhile, the design and realization of multiple ENDC combinations can be flexibly realized, and the competitiveness of the product is improved.

Of course, the first detection link of this embodiment may also be used to set the low-frequency link ant_l Band of the detection main set, and the coupler is set on the high-frequency link ant_mh Band of the main set, which can also implement the technical scheme of the present utility model.

The device is also provided with a diversity receiving link, wherein the diversity receiving link is provided with a frequency dividing module, and the signal input end of the frequency dividing module is connected with the signal output end of the radio frequency switch.

Preferably, in order to realize the reception of diversity frequency Band signals corresponding to the main set, the other end of the frequency dividing module opposite to the radio frequency switch is provided with a first output port and a second output port which are respectively connected with a radio frequency processor, and the radio frequency processor respectively constructs a diversity first acquisition link div_RX_MH Band and a diversity second acquisition link div_RX_L Band through the first output port and the second output port.

The working principle of this example is:

when the product works under the 5G network NSA mode, the product can have the frequency bands of two modes of LTE and NR, namely the product uplink has the frequency bands of LTE and NR at the same time. Under the actual network use scene, the processor chip in the product can dynamically adjust the transmitting power of the product end according to the signal quality of the received communication base station to realize the balance of performance and energy consumption. At this time, the power of LTE and NR frequency bands needs to be adjusted simultaneously, in the conventional radio frequency FEM device adopted in this example, the Dual Ant port (Dual antenna port) contained in the conventional radio frequency FEM device may meet the requirement that the link end LTE and the NR main set transmit and receive and operate simultaneously, but only one of the standard (LTE or NR) frequency bands and the radio frequency processor chip perform power detection in an uplink operating state, so as to implement a dynamic power control function, specifically, see a first detection link cpl_mh Band shown by a dashed line on the front end module FEM in fig. 1, where the detection link is finally connected to the processor chip. As shown in fig. 1, a coupler is added to the main set low-frequency link ant_l Band in an innovative manner, so that the link can also complete the power detection of the radio frequency processor chip so as to realize the dynamic power control function. Therefore, dynamic power control can be realized in both LTE and NR frequency bands under NSA, and the normal transmission and reception of related radio frequency indexes of the main set is ensured.

In addition, the diversity receiving link uses a frequency division module (such as a combiner), so that when the ENDC of low+middle Band and low+high Band in NSA system are combined, the LTE and NR diversity receiving can work simultaneously, specifically, see the combiner of FIG. 1 and two black dotted line links, namely a diversity first acquisition link Div_RX_MH Band and a diversity second acquisition link Div_RX_L Band, which are finally connected with a processor chip.

In addition, in the embodiment, the high-frequency transmission and reception in the main set, the low-frequency transmission and reception in the main set and the diversity reception are flexibly distributed into the ANT1, the ANT2 and the ANT3 through the 3P3T radio frequency switch, so that the selectivity of the antenna is increased, and the antenna debugging difficulty is reduced.

The construction of the utility model is described in detail below in connection with a specific implementation circuit.

As shown in fig. 2, the front-end module FEM of this embodiment adopts a FEM chip U2206 with a brand of smartmicro and a model of S25920-12, and one of its functions is to switch and conduct one of the ports of the ant_mhb pin and mh_trx1-9 pin of the FEM chip U2206, and one of the ports of the ant_lb pin and l_trx1-6 pin by internal software control, and the other function is to implement the power detection and regulation functions of the chip end through the CPL pin related link.

The coupler of this example includes a coupler chip U2232, which couples out a portion of the power in the forward transmission link, and implements the power detection and regulation functions at the chip end through its CPL pin-related link.

Preferably, the present example further includes a filtering module, where the filtering module is disposed between the signal output ends of the main set first link and the main set second link and the radio frequency switch signal input end.

The filtering module in this example includes a filter U2230 and a filter U2231, where an input end of the filter U2230 is connected to an ant_mhb pin of the front end module FEM, an output end of the filter U2230 is connected to a radio frequency switch, an input end of the filter U2231 is connected to an ant_lb pin of the front end module FEM through a coupler, and an output end of the filter U2231 is connected to the radio frequency switch.

The brand of the material used by the filter U2230 is ACX, the model is LF1005-W2R5NBAT/LF, and the function is to suppress the energy of signals outside the 1800-2700MHz frequency range; the brand of the material used for the U2231 bit of the filter is ACX, the model is LF1005-LR83NBAT/LF, and the filter has the functions of inhibiting the energy of signals outside the frequency range of 698-960MHz, inhibiting interference and improving the communication quality.

As shown in fig. 3, the RF switch of this example employs a 3P3T RF switch U2306, whose RF1/RF3/RF5 Pin pins can communicate with RF2/RF4/RF6 through a software control mechanism. Through the circuit, different frequency bands can be planned to different antennas at the front end, the antenna selectivity is increased, and meanwhile, the antenna debugging difficulty is reduced.

As shown in fig. 4, the frequency dividing module in this embodiment includes a combiner U2312 and a radio frequency switch U2307, and ensures that when the low+middle Band and the low+high Band work at ENDC, diversity of two frequency bands of LTE and NR can work normally at the same time by utilizing the characteristics of the dual output port of the coupler U2312 and the dual port of the radio frequency switch U2307.

Specifically, the combiner U2312 of this embodiment specifically functions to divide frequency, so as to implement simultaneous operation of signals with frequency ranges of 698-960MHz and 1710-2710MHz on a link, and the radio frequency switch U2307 is configured internally to enable the ant a Pin to communicate with one of ports of the RFA1-6 Pin and the ant b Pin to communicate with one of ports of the RFB1-6 Pin, so as to implement reception and transmission of diversity acquisition signals.

Compared with the prior art, the utility model has the following innovation points and advantages:

1. based on the traditional mature and mass-applied devices, brands are diversified in types;

2. the localization rate of the device is 100%, the supply chain is stable, and the cost advantage is outstanding;

3. the flexible antenna design reduces the corresponding debugging difficulty and improves the adaptability of the product.

The above embodiments are preferred embodiments of the present utility model, and are not intended to limit the scope of the present utility model, which includes but is not limited to the embodiments, and equivalent modifications according to the present utility model are within the scope of the present utility model.

Claims

1. A5G product radio frequency front end system based on traditional radio frequency device realization, its characterized in that: the front end module FEM is provided with two middle main set first links and main set second links which are respectively connected with the radio frequency switch, the front end module FEM is provided with a first detection link which is connected with a radio frequency processor and used for detecting the transmitting power of one link, the other link of the front end module FEM is provided with a coupler, and the coupler is provided with a second detection link which is connected with the radio frequency processor and used for detecting the transmitting power of the link.

2. The 5G product rf front-end system implemented based on conventional rf devices of claim 1, wherein: the 5G product radio frequency front end system is also provided with a diversity receiving link, the diversity receiving link is provided with a frequency dividing module, and the signal input end of the frequency dividing module is connected with the signal output end of the radio frequency switch.

3. The 5G product rf front-end system implemented based on conventional rf devices of claim 2, wherein: the other end of the frequency division module, which is opposite to the radio frequency switch, is provided with a first output port and a second output port which are respectively connected with a radio frequency processor, and the radio frequency processor respectively constructs a diversity first acquisition link and a diversity second acquisition link through the first output port and the second output port.

4. The 5G product rf front-end system implemented based on conventional rf devices of claim 3, wherein: the frequency dividing module comprises a combiner U2312, and the combiner U2312 is provided with an input pin COM, a first output pin HB and a second output pin LB.

5. The 5G product rf front-end system implemented based on conventional rf devices of claim 4, wherein: the frequency division module further comprises a switch unit, wherein the switch unit is provided with a group of input ends and a plurality of groups of output ends, the group of input ends are respectively connected with two output pins of the combiner U2312, and the plurality of groups of output ends are respectively connected with the radio frequency processor.

6. A 5G product rf front-end system implemented based on conventional rf devices as claimed in any one of claims 1-3, wherein: the radio frequency switch is connected with more than two antennas and is used for flexibly selecting a receiving antenna or a transmitting antenna.

7. The 5G product rf front-end system implemented based on conventional rf devices of claim 6, wherein: the number of the antennas is 3, the radio frequency switch adopts a 3P3T radio frequency switch, and the transmission and the reception of a first link of a main set, the transmission and the reception of a second link of the main set and the diversity reception are flexibly distributed to three antennas through the 3P3T radio frequency switch.

8. A 5G product rf front-end system implemented based on conventional rf devices as claimed in any one of claims 1-3, wherein: the front end module FEM constructs a main set high-frequency link through an ANT_MHB pin, constructs a main set low-frequency link through an ANT_LB pin, and the coupler is arranged on the main set low-frequency link.

9. The 5G product rf front-end system implemented based on conventional rf devices of claim 8, wherein: the device also comprises a filtering module, wherein the filtering module is arranged between the signal output ends of the main set first link and the main set second link and the radio frequency switch signal input end.

10. The 5G product rf front-end system implemented based on conventional rf devices of claim 9, wherein: the filtering module includes a filter U2230 and a filter U2231, where an input end of the filter U2230 is connected to an ant_mhb pin of the front end module FEM, an output end of the filter U2230 is connected to a radio frequency switch, an input end of the filter U2231 is connected to an ant_lb pin of the front end module FEM through a coupler, and an output end of the filter U2231 is connected to the radio frequency switch.