WO2022017404A1 - Architecture frontale radiofréquence, appareil d'antenne et terminal de communication - Google Patents

Architecture frontale radiofréquence, appareil d'antenne et terminal de communication Download PDF

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Publication number
WO2022017404A1
WO2022017404A1 PCT/CN2021/107485 CN2021107485W WO2022017404A1 WO 2022017404 A1 WO2022017404 A1 WO 2022017404A1 CN 2021107485 W CN2021107485 W CN 2021107485W WO 2022017404 A1 WO2022017404 A1 WO 2022017404A1
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WO
WIPO (PCT)
Prior art keywords
radio frequency
band
module
frequency
switch
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PCT/CN2021/107485
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English (en)
Chinese (zh)
Inventor
胡自洁
倪建兴
曹原
倪楠
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锐石创芯（深圳）科技有限公司
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Publication of WO2022017404A1 publication Critical patent/WO2022017404A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/401—Circuits for selecting or indicating operating mode

Definitions

  • the present application relates to the field of wireless communication systems for communication terminals, in particular to an antenna device on a communication terminal, and further to a radio frequency front-end architecture in the antenna device.
  • the communication terminal 1000 realizes wireless communication with the antenna device 200 of the base station 2000 through the built-in antenna device 100 .
  • the antenna device 100 on the communication terminal 1000 has multiple antennas, which can use multiple antennas at both the transmitting end and the receiving end of the antenna device 100 through the multiple-input multiple-output (MIMO) technology to form multiple antennas between transmitting and receiving.
  • MIMO multiple-input multiple-output
  • 1T4R, 2T4R, etc. need to be implemented for data transmission in many frequency bands (such as N77 and N79).
  • the antenna device 100 on the communication terminal 1000 can receive N77 and transmit N77, but in order to support the implementation of 1T4R, 2T4R, etc., additional antennas and corresponding transmit and/or receive links need to be added, which increases the complexity of circuit design and also Inevitably increases the area of the RF front-end architecture.
  • the existing antenna devices generally include a baseband module 4, a radio frequency transceiver module 2, a radio frequency front-end architecture, and an antenna link module 3;
  • the baseband module 4 is used to perform digital baseband signal processing and perform digital baseband Signal encoding and decoding;
  • the RF transceiver module 2 is used to perform the conversion between the digital baseband and the analog RF signal, process the digital baseband signal sent by the baseband module into a RF analog signal and then send it to the RF front-end architecture, or receive the RF front-end architecture.
  • the transmitted radio frequency analog signal is converted into a digital baseband signal and sent to the baseband module 4; the radio frequency front-end architecture selects to send the radio frequency analog signal to the antenna link module 3 or receive the radio frequency analog signal from the antenna link module 3, so as to realize the radio frequency analog signal. Signal amplification, filtering and other processing.
  • the antenna link module 3 includes an external antenna to receive or transmit radio frequency analog signals.
  • each RF processing link through the selection of a specific frequency band in the RF processing link, it can process a specific frequency band, such as N77 Or the RF signal of N79 is processed, but in this way, the module of the RF front-end architecture requires a complex architecture formed by multiple RF front-end modules to realize the rotation and reception of signals in multiple frequency bands.
  • the above RF front-end architecture is relatively complex, and further simplification is necessary.
  • the present application provides a radio frequency front-end structure, an antenna device and a communication terminal.
  • a radio frequency front-end architecture is provided, and the radio frequency front-end architecture is provided with more than two broadband radio frequency processing links;
  • the broadband radio frequency processing link includes an amplifier unit and a multi-band adjustable filter unit;
  • the amplifier unit supports signal amplification of at least two frequency bands in the same communication standard, and the multi-band adjustable filtering unit is used to filter the radio frequency signals transmitted in the broadband radio frequency processing link;
  • the tunable filter unit includes at least three operating modes, in each of the operating modes the multi-band tunable filter unit supports the passage of signals within a frequency band, wherein each of the frequency bands is at least partially associated with the amplifier corresponds to at least one frequency band supported by the unit.
  • an antenna device including a baseband module, a radio frequency transceiver module, a radio frequency front-end architecture, and an antenna link module.
  • Another aspect of the present application provides a communication terminal, where the communication terminal includes the above-mentioned antenna device.
  • an amplifier unit and a multi-band tunable filtering unit are provided in more than two broadband radio frequency processing links in the radio frequency front-end architecture of the antenna module; in this way, for example, in 5G applications, the It can work in different working modes, can support a variety of different modes of signal transmission, can further simplify the structure of the RF front-end architecture, simplify its structure, reduce the complexity of the design, and reduce the area of the RF front-end architecture.
  • 1 is a schematic diagram of communication between a built-in antenna device in a communication terminal and an antenna device in a base station;
  • Fig. 2 is the frame schematic diagram of the antenna device
  • FIG. 3 is a schematic diagram of a framework of a radio frequency front-end module provided in a specific embodiment of the present application
  • FIG. 4 is a schematic diagram of a multi-band tunable filtering unit provided in a specific embodiment of the present application.
  • FIG. 5 is a schematic frame diagram of the preferred antenna device provided in the specific embodiment of the present application.
  • FIG. 6 is a schematic frame diagram of another preferred antenna device provided in the specific implementation manner of the present application.
  • FIG. 7 is a schematic diagram of a spectrum of a multi-band tunable filter unit provided in a specific embodiment of the present application.
  • FIG. 8 is a schematic diagram of one of the ways of spectrum selection of a multi-band adjustable filter unit provided in the specific embodiment of the present application to reduce interference;
  • FIG. 9 is a second schematic diagram of the spectrum selection of the multi-band adjustable filter unit provided in the specific embodiment of the present application to reduce interference;
  • FIG. 10 is a specific schematic diagram of a radio frequency front-end architecture provided in the specific implementation manner of the present application.
  • FIG. 11 is a specific schematic diagram of a further preferred radio frequency front-end architecture provided in the specific implementation manner of the present application.
  • 1000 a communication terminal; 2000, a base station; 100, an antenna device (in the communication terminal); 200, an antenna device (in the base station);
  • RF front-end module 1. RF front-end module; 2. RF transceiver module; 3. Antenna link module; 4. Baseband module;
  • Broadband RF processing link 19a, Multi-band adjustable filter unit; 19b, Amplifier unit; 191, First broadband RF processing link; 19N, Nth broadband RF processing link; 10. Switch selection module; 19a1, 19a2, the first switch; 19a3, the first frequency adjustment module; 19a4, the second switch; 19a5, the second frequency adjustment module;
  • T11 the first main antenna port
  • T12 the second main antenna port
  • T13 the third main antenna port
  • T14 the fourth main antenna port
  • T15 the fifth main antenna port
  • RT11 the first main transceiver port
  • RT12 The second main transceiver port
  • AUX1 the first peripheral port
  • T21 the first sub-antenna port; T22, the second sub-antenna port; T23, the third sub-antenna port; R21, the first sub-receiving port; R22, the second sub-receiving port; RT21, the first sub-transmitting port; RT22, The second transceiver port.
  • the terms “installed”, “connected” and “connected” should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements.
  • installed should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements.
  • the communication terminal 1000, the antenna device 100 and the radio frequency front-end architecture disclosed in the present application will be specifically explained.
  • the communication terminal 1000 implements wireless communication with the antenna device 200 in the base station 2000 through the built-in antenna device 100 .
  • the antenna device 100 in the communication terminal 1000 can transmit the radio frequency signal of the relevant frequency band to the outside through its internal modules, and receive the radio frequency signal of the relevant frequency band sent by the antenna device 200 on the base station 2000.
  • the communication terminal 1000 not only includes the antenna device 100, but also includes other modules, such as a processor, a user interface, a memory, and the like.
  • the communication terminal is, for example, a personal digital assistant (PDA), a mobile phone, a card in a notebook computer, a wireless tablet computer, and the like.
  • PDA personal digital assistant
  • the following description of the antenna device 100 is only made from the perspective of the communication terminal 1000 .
  • the antenna device 100 in this example also includes a baseband module 4, a radio frequency transceiver module 2, a radio frequency front-end architecture, and an antenna link module 3;
  • the baseband module 4 is used to perform digital baseband signal processing and digital The encoding and decoding of the baseband signal;
  • the radio frequency transceiver module 2 is used to perform the conversion between the digital baseband and the analog radio frequency signal, and the digital baseband signal sent by the baseband module 4 is processed into a radio frequency analog signal and then sent to the radio frequency front-end architecture (RF front-end).
  • RF front-end radio frequency front-end
  • the architecture usually includes more than one RF front-end module 1) shown in the legend, or receives the RF analog signal transmitted by the RF front-end architecture, converts it into a digital baseband signal and sends it to the baseband module 4; the RF front-end architecture selects the antenna link
  • the module 3 transmits the radio frequency analog signal or receives the radio frequency analog signal from the antenna link module 3, and realizes processing such as amplification and filtering of the radio frequency analog signal.
  • the antenna link module 3 includes an external antenna to receive or transmit radio frequency analog signals.
  • the core point in this example is to improve the broadband RF processing link 19 in the RF front-end architecture, and its filter adopts a multi-band filtering processing unit. The following will focus on this part, and apply it through a specific RF front-end architecture. Explain in detail.
  • a radio frequency front-end architecture is disclosed in this example, and the radio frequency front-end architecture is provided with more than two broadband radio frequency processing links 19 ; it should be understood that the radio frequency front-end architecture in this example may also include other Existing conventional radio frequency processing links; conventional radio frequency processing units also include various types of amplifying units, filters and other devices; as long as the radio frequency front-end architecture includes more than two broadband radio frequency processing links 19 improved in this application, It should be regarded as falling within the protection scope of this application.
  • the RF front-end architecture includes more than one RF front-end module; the above two or more broadband RF processing links 19 may be distributed in one RF front-end module, or may be included in multiple RF front-end modules respectively.
  • a radio frequency front-end module includes N broadband radio frequency processing links 19, which are respectively referred to as a first broadband radio frequency processing link 191, ... Nth broadband radio frequency processing link 19N;
  • the broadband radio frequency processing link 19 includes an amplifier unit 19b and a multi-band adjustable filter unit 19a;
  • the amplifier unit 19b supports signal amplification of at least two frequency bands (or frequency bands) in the same communication standard. Filter processing; the multi-band adjustable filtering unit 19a includes at least three operating modes, and in each of the operating modes, the multi-frequency adjustable filtering unit 19a supports the passage of signals in a frequency band, wherein each The frequency band corresponds at least in part to at least one frequency band supported by the amplifier unit 19b.
  • the same communication standard mentioned in this example such as 5G/NR (global 5G standard with new aperture design), LTE (Long Term Evolution, long term evolution) or CDMA (Code Division Multiple Access, code division multiple access), etc., It is not repeated here.
  • the same communication standard supported by the amplifier unit 19b is 5G/NR.
  • Its amplifier unit supports, for example, signal amplification in at least two frequency bands (N77 and N79 or N78 and N79). Wherein, at least two frequency bands in different frequency bands supported by the amplifier unit are frequency bands without frequency overlap or coverage.
  • the multi-band adjustable filtering unit is used for filtering the radio frequency signal transmitted in the broadband radio frequency processing link; the multi-band adjustable filtering unit includes at least three working modes, in each of the working modes
  • the multi-band tunable filtering unit supports the passage of signals within a frequency band, wherein each of the frequency bands at least partially corresponds to at least one frequency band supported by the amplifier unit. Specifically, the different working modes of the multi-band adjustable filter unit are matched with the corresponding amplifier unit.
  • the multi-band adjustable filter unit includes three working modes: the first working mode, the The multi-band adjustable filtering unit supports the passage of signals in the first frequency band; in the second working mode, the multi-band adjustable filtering unit supports the passage of signals in the second frequency band; in the third working mode, the multi-band can be
  • the tuning filter unit supports the passage of signals in the first frequency band and the second frequency band. That is, the frequency band supported in each working mode of the multi-band tunable filtering unit at least partially corresponds to at least one frequency band supported by the amplifier unit.
  • the frequency band supported in each working mode of the multi-band adjustable filtering unit only needs to include at least one frequency band supported by the amplifier unit.
  • the frequency band supported by the corresponding working mode of the filter can be the frequency band including at least the N77 frequency band, for example: 3.3GHz ⁇ 4.2GHz , 3.3GHz ⁇ 4.3GHz or 3.3GHz ⁇ 4.4GHz, etc.
  • the frequency bands supported by the amplifier unit are N77 and N79
  • the frequency bands supported by the three operating modes of the multi-band tunable filter unit may be:
  • 3.3GHz to 4.2GHz Alternatively, 3.3GHz to 4.2GHz, 4.3GHz to 5.0GHz, 3.3GHz to 5.0GHz, and the like.
  • the multi-band adjustable filtering unit may include four working modes: a first working mode, the multi-band adjustable filtering unit The unit supports the signal passing in the N77 frequency band; the second working mode, the multi-band adjustable filtering unit supports the signal passing in the N78 frequency band; the third working mode, the multi-band adjustable filtering unit supports the N79 frequency band. In the fourth working mode, the multi-band adjustable filtering unit supports the passage of signals in the N77+N79 frequency band.
  • the communication terminal 1000 supports dual-card dual-standby mode, wherein one amplifier unit 19b in a certain broadband RF processing link 19a supports N77 /N78 frequency band, one amplifier unit 19b in another broadband radio frequency processing chain 19a supports the N79 frequency band.
  • the multi-band adjustable filtering unit 19a corresponding to the amplifier unit 19b supporting N77/N78 is in a working mode that supports the passage of radio frequency signals in the N77/N78 frequency band.
  • the multi-band adjustable filter unit 19a corresponding to the amplifier unit 19b supporting N79 is in another working mode, which supports the passage of radio frequency signals within the N79 frequency band.
  • the two amplifier units 19b support signal transmission in the same frequency band to support the MTNR mode. For example, if both amplifier units support the transmission of N77 frequency band signals, then the corresponding The filter supports the passage of signals in the N77 band.
  • the filter can be in the all-pass mode (N77/N78+N79), so that the components connected to the circuit can be reduced and the insertion loss can be reduced.
  • the multi-band tunable filtering unit 19a in this example is used to filter the radio frequency signal transmitted in the broadband radio frequency processing link 19;
  • the multi-band tunable filtering unit 19a may include a band-pass filter whose bandwidth can be adjusted The frequency range of the bandwidth includes at least the first frequency band and the second frequency band;
  • the multi-band adjustable filtering unit 19a can be selected to support at least the first frequency band and/or the second frequency band.
  • each broadband radio frequency processing link 19 is a multi-band adjustable filter unit 19a
  • the The radio frequency processing links of each are broadband radio frequency processing links 19a
  • the filters in all the radio frequency processing links are multi-band adjustable filtering units 19a.
  • the above-mentioned multi-band adjustable filter unit 19a is a band-pass filter whose bandwidth can be adjusted. Since it supports multiple frequency segments, in other words, it includes at least a first frequency segment and a second frequency segment, but is not limited to the above two frequency segments, and may also include a third frequency segment, a fourth frequency segment, and the like. The above frequency bands may also be selected to support a third frequency band, a fourth frequency band, and so on.
  • This bandwidth-adjustable bandpass filter allows signals in a certain frequency band to pass, and rejects signals, interference and noise below or above that frequency band.
  • the RF front-end module includes a switch selection module 10; two or more broadband RF processing links 19 are connected to the switch selection module 10; the switch selection module 10 is used to select the connection Connect to the antenna link module outside the RF front-end module.
  • the antenna in the above-mentioned antenna link module can select the first broadband radio frequency processing link 191 or the second broadband radio frequency processing link, . . . the Nth broadband radio frequency processing link 19N through the switch selection module 10 .
  • the antennas in the above-mentioned antenna link module can be selected by the above-mentioned switch selection module 10 to connect different broadband radio frequency processing links (at least two) in the broadband radio frequency processing link 19 to different antennas respectively, so as to realize the The radio frequency signal is processed by each broadband radio frequency processing link 19 and then selected for external transmission through the antenna, or after the radio frequency signal is received through the antenna, the relevant broadband radio frequency processing link 19 is selected for processing by the switch selection module 10 .
  • the multi-band adjustable filter unit 19a includes a multi-band band-pass filter 19a1, a first switch 19a2, a first frequency adjustment module 19a3, a second switch 19a4 and a second frequency adjustment module 19a5;
  • the first frequency adjustment module 19a3 is connected to the multi-band bandpass filter 19a1 through the first switch 19a2, so that the multi-band adjustable filter unit 19a supports the first frequency by gating the first switch 19a2 segment filtering;
  • the second frequency adjustment module 19a5 is connected to the multi-band bandpass filter 19a1 through the second switch 19a4, so that the multi-band adjustable filter unit 19a supports the second frequency band by gating the second switch 19a4. filter.
  • the first switch 19a2 and the second switch 19a4 are responsible for the connection of the first frequency adjustment module 19a3 and the second frequency adjustment module 19a5.
  • the multi-band bandpass filter 19a1 is connected to the main circuit of the broadband radio frequency processing chain 19 .
  • the first frequency adjustment module 19a3 and the second frequency adjustment module 19a5 are used in combination with the multi-band bandpass filter 19a1, so that it can have the ability to select the first frequency band, the second frequency band, or the first frequency band + the second frequency band. used in combination.
  • the above-mentioned first frequency adjustment module 19a3 and second frequency adjustment module 19a5 can generally be implemented by using a chopper filter circuit, etc., which are well known to those in the field of communications, and will not be repeated here.
  • the above-mentioned multi-band adjustable filter unit 19a can also be connected in parallel with more switches and branches of the corresponding frequency adjustment modules in series, so as to realize more different working modes, which will not be repeated here.
  • the RF front-end architecture in this example includes a first RF front-end module 1A and a second RF front-end module 1B; or, as shown in FIG. 6 , the RF front-end architecture includes a first RF front-end module 1A, The second radio frequency front-end module 1B and the third radio frequency front-end module 1C.
  • the radio frequency front-end architecture is provided with two broadband radio frequency processing links 19; wherein, the first broadband radio frequency processing link includes a first amplifier unit and a first multi-band adjustable filter unit,
  • the second broadband radio frequency processing chain includes a second amplifier unit and a second multi-band tunable filter unit;
  • Both the first amplifier unit and the second amplifier unit support signal amplification of the first frequency band and the second frequency band in the same communication standard
  • the first multi-band tunable filtering unit and the second multi-band tunable filtering unit include three operating modes, each of which supports the passage of signals within a frequency band, wherein each of the frequencies A band corresponds at least in part to at least one of the first and second frequency bands.
  • the frequency range of the signal supported by the multi-frequency band-pass filter in the first broadband radio frequency processing link 191 is between 3.3 GHz and 5.0 GHz. It includes the first frequency band (referred to as the first band) N77 (3.3GHz ⁇ 4.2GHz) and the second frequency band (referred to as the second band) N79 (4.4GHz ⁇ 5.0GHz); the second broadband radio frequency processing link (referred to as the first The frequency range of the signal supported by the multi-frequency band-pass filter in the second link) is also between 3.3GHz and 5.0GHz, including the first frequency band N77 (3.3GHz to 4.2GHz) and the second frequency band N79 ( 4.4GHz ⁇ 5.0GHz).
  • the above-mentioned N77 and N79 can be optionally used.
  • the multi-band bandpass filter 19a1 is combined with the first frequency adjustment module 19a3 to realize the N77 frequency band choose.
  • the second switch 19a4 is turned on and the second frequency adjustment module 19a5 is connected to the broadband radio frequency processing link 19
  • the multi-band bandpass filter 19a1 is combined with the first frequency adjustment module 19a3 to realize the selection of the N79 frequency band .
  • the first switch 19a2 and the second switch 19a4 are both non-conductive, they can support a bandwidth range including the N77+N79 frequency band.
  • it can also select the first frequency segment as N78, and the second frequency segment as N79.
  • the first frequency segment as N78 and the second frequency segment as N79 are used for illustration.
  • the bandwidth supported by the multi-band adjustable filtering unit 19a in the first link can be adjusted to N77, and the N79 frequency band is transmitted in the second link. signal, adjust the bandwidth supported by the multi-band adjustable filtering unit 19a of the second link to N79.
  • the N79 frequency band signal is transmitted in the first link conversely, the bandwidth supported by the multi-band adjustable filtering unit 19a in the first link can be adjusted to N79, and the second link
  • the bandwidth supported by the multi-band adjustable filtering unit 19a of the second link is adjusted to the signal of the N77 frequency band.
  • the RF front-end architecture includes a link frequency detection module and a frequency selection control module, and the link frequency detection module is used to detect the RF signals in each of the broadband RF processing links 19, and the frequency The selection control module is used to control the on-off of the first switch 19a2 and the second switch 19a4 in the multi-band adjustable filtering unit 19a in each broadband radio frequency processing chain 19 .
  • the frequency of the radio frequency signal in the broadband radio frequency processing link 19 is detected by the link frequency detection module, so as to switch the frequency of the multi-band filtering unit in each broadband radio frequency processing link 19, so as to reduce the frequency of each broadband radio frequency processing link 19. Interference between links 19.
  • the first switch 19a2 when it is detected that the frequency of the radio frequency signal in the broadband radio frequency processing link 19 is the first frequency band, the first switch 19a2 is controlled to be turned on, so that the main circuit of the multi-band bandpass filter 19a1 can be connected to the first frequency band.
  • the frequency adjustment module 19a3, the combination of the two realizes the selection of the first frequency band.
  • the second switch 19a4 is controlled to be turned on, so that the main circuit of the multi-band bandpass filter 19a1 can be connected to the second frequency adjustment module 19a5, the combination of the two realizes the selection of the second frequency band.
  • the RF front-end architecture in this example includes a first RF front-end module 1A and a second RF front-end module 1B; the first RF front-end module 1A is the main RF front-end module, and the second RF front-end module 1B is the secondary RF front-end module;
  • the main RF front-end module includes two main signal transceiver links and a main antenna switch selection module 13; the two main signal transceiver links are both connected to the main antenna switch selection module 13; (but it is not limited to only two. main signal transceiver chain, there can be more main signal transceiver chain)
  • Each channel of the main signal transceiver link includes a radio frequency power amplifier module 11, a radio frequency transceiver switch 12, and a multi-band main filter 14, which are arranged in sequence;
  • the radio frequency power amplifier module 11 includes a main low noise amplifier 111 and a power amplifier 112; the power amplifier 112 and the main low noise amplifier 111 are connected to the radio frequency transceiver switch 12; the main low noise amplifier 111 is used to receive slave radio frequencies.
  • the radio frequency signal transmitted by the transceiver switch 12 is amplified and output to the radio frequency transceiver module 2; the power amplifier 112 is used to receive the radio frequency signal sent by the radio frequency transceiver module 2 and amplify it and output it to the radio frequency transceiver switch 12;
  • the RF power amplifier module 11 in each signal transceiver circuit can be packaged into a separate chip, or the main low-noise amplifier 111 in the two-channel RF power amplifier module 11 can be integrated into a single chip, and the two-channel RF power amplifier module can be integrated into a single chip.
  • the power amplifier 112 in 11 is integrated into a single chip. It can also be considered to integrate two radio frequency power amplifier modules 11 into one chip, which is feasible.
  • the power of the radio frequency signal output by the radio frequency transceiver module 2 is very small, it needs to obtain enough radio frequency power after a series of amplification before being fed to the antenna for radiation.
  • a power amplifier 112 In order to obtain a sufficiently large radio frequency output power, a power amplifier 112 must be used, and the power amplifier 112 is also known to those skilled in the art and will not be repeated here.
  • the RF transceiver switch 12 is set between the RF power amplifier module 11 and the multi-band main filter 14, and is used to switch the connection between the multi-band main filter 14 and the main low-noise amplifier 111 or the power amplifier 112 to select Connect the multi-band main filter 14 to the main low noise amplifier 111 or the power amplifier 112;
  • the main function of the RF transceiver switch 12 (generally referred to as T/R switch) is to control the switching between the receiving and transmitting states of the entire main RF front-end module, and is a key module of the main RF front-end module.
  • T/R switch The main function of the RF transceiver switch 12
  • There are many manufacturing processes for the traditional radio frequency transceiver switch 12 and most of the products commonly used in the market currently use the III-V family process or discrete devices such as PIN diodes.
  • the advantages of this type of switch are lower power dissipation and better isolation.
  • the disadvantages are high cost, high power consumption, and large footprint.
  • the radio frequency transceiver switch 12 is implemented through an SOI (English full name: Silicon-On-Insulator) process.
  • CMOS technology has outstanding advantages such as high integration, low cost, and low power consumption, so that the implementation of the radio frequency transceiver switch 12 by using the CMOS process has also become an optional solution. This is known to those skilled in the art.
  • the multi-band main filter 14 is arranged between the antenna switch selection module 13 and the radio frequency transceiver switch 12, and is used to filter the radio frequency signal amplified by the power amplifier 112 and transmit it to the main antenna switch selection module. 13 or the RF signal received from the main antenna switch selection module 13 is filtered and then transmitted to the main low noise amplifier 111; the multi-band main filter 14 is the multi-band adjustable filter unit 19a;
  • the main antenna switch selection module 13 is used to connect the two-way main signal transceiver link and the main antenna or to connect the secondary radio frequency front-end module;
  • the secondary RF front-end module includes a port selection module 15, a secondary antenna switch selection module 16 and two secondary signal receiving links, and the two secondary signal receiving links are located in the port selection module 15 and the secondary antenna switch selection module. between 16;
  • the two secondary signal receiving chains include secondary low noise amplifiers 17 and multi-band secondary filters 18;
  • the secondary antenna switch selection module is used to connect the gated secondary antenna or the main radio frequency front-end module, and is used to receive the radio frequency signal of the main antenna or the secondary antenna, or to transmit the radio frequency signal received by the secondary antenna to the main radio frequency front-end module;
  • the frequency band sub-filter 18 is used to filter the radio frequency signal received by the sub-antenna switch selection module and transmit it to the sub-low noise amplifier 17; signal, and amplify it and output it to the RF transceiver module;
  • the multi-band sub-filter 18 is the multi-band adjustable filter unit 19a.
  • the first sub-filter 181 is set as a multi-band adjustable filter unit 19a with adjustable bandwidth
  • the second sub-filter 182 is set as a fixed-bandwidth filter (N77+N79).
  • the first sub-filter 181 will receive a control signal to adjust the bandwidth supported by the first sub-filter 181 . If the first sub-signal receiving link receives signals in the N77 frequency band, and the second sub-signal receiving link receives signals in the N79 frequency band, in order to avoid signal interference, the first sub-filter 181 is controlled to be adjusted to support the N77 frequency band. filter.
  • the first sub-filter 181 is controlled to be adjusted to support the N79 frequency band. filter.
  • the above-mentioned multi-band main filter and multi-band sub-filter 18 both use the multi-band adjustable filter unit 19a described above in this application.
  • the following only specifically explains the specific structure and working process of the radio frequency front-end architecture introduced by the example.
  • the main low noise amplifier 111 and the sub low noise amplifier 17 in this example refer to amplifiers with very low noise figures. And it is a wide-band low-noise amplifier, which can support the transmission and amplification of multiple frequency band signals under the same communication standard, and it can all use the amplifier unit 19b mentioned above; for example, it can support the transmission of N77/N78 and N79 frequency band signals. and zoom in. In the case of amplifying weak signals, the noise of the amplifier itself may seriously interfere with the signal, so it is desirable to reduce the noise of the amplifier itself to improve the output signal-to-noise ratio. Low noise amplifiers are well known to those skilled in the art, which can further amplify the received radio frequency signal and then output it.
  • the main antenna switch selection module 13 includes a main switch circuit, a plurality of main antenna ports, a plurality of peripheral ports and a plurality of main transceiver ports;
  • the main switch circuit is used for connecting and gating the main antenna port and the main transceiver port or the peripheral port; a plurality of switches are arranged inside the main switch circuit to realize the main antenna port and the main transceiver port, or the main antenna Gating between ports and peripheral ports.
  • the main transceiver port is connected to the multi-band main filter 14 of the main signal transceiver link; in this example, there are at least two main transceiver ports, which are called the first main transceiver port RT11 and the second main transceiver port RT11 respectively.
  • Port RT12 it is used to connect the first main signal transceiving link and the second main signal transceiving link respectively, specifically connected to the first main filter 14a of the first main signal transceiving link, the second main signal transceiving link
  • the second main filter 14b (further detailed description will follow).
  • the main transceiver port is further expanded and added, but it is not limited to have only two main transceiver ports.
  • the main antenna port is used to connect the main antenna or the sub-antenna switch selection module 16 connected to the sub-RF front-end module, so as to select and connect the main antenna or the sub-antenna to the two main signal receiving links;
  • the main antenna ports are preferably three main antenna ports, specifically the first main antenna port T11, the second main antenna port T12 and the third main antenna port T13 listed in the figure; the three main antenna ports are used to connect
  • the main antenna is either connected to the sub-RF front-end module (specifically connected to the sub-antenna switch selection module 16, and connected to the sub-antenna through the sub-antenna switch selection module 16), wherein the first main antenna port T11 is connected to the first main antenna 31, and the second main antenna port T11 is connected to the first main antenna 31.
  • the main antenna port T12 is connected to the second main antenna 32, and the third main antenna port T13 is connected to one of the ports of the secondary antenna switch selection module 16 (introduced later, marked as the first secondary transceiver port RT21), which can pass the secondary antenna.
  • the switch selection module 16 selects to connect to the first sub-antenna 33 or the second sub-antenna 34 ; that is, to extend the connection to the first sub-antenna 33 or the second sub-antenna 34 through the third main antenna port T13 .
  • the main radio frequency front-end module can not only receive and transmit radio frequency signals through the first main antenna 31 and the second main antenna 32 , but also can extend the reception and transmission of radio frequency signals through the first sub-antenna 33 or the second sub-antenna 34 .
  • the fourth main antenna port T14 and the fifth main antenna port T15 are reserved for subsequent expansion to connect antennas or to connect other RF front-end modules.
  • the peripheral port is used to connect to the sub-RF front-end module, connect the main antenna to the sub-antenna switch selection module 16 of the sub-RF front-end module, and transmit the signal received by the main antenna to the two channels of the sub-RF front-end module. signal reception link.
  • the peripheral port may be one, for example, referred to as the first peripheral port AUX1, and the first peripheral port AUX1 is internally selected to turn on the first main switch or the second main switch through the switch of the main switch circuit.
  • the first peripheral port AUX1 is externally connected to the third sub-antenna port T23 of the sub-RF front-end module; in the sub-RF front-end module, the third sub-antenna port T23 and the first sub-antenna port T23 and the first sub-antenna port T23 can be gated through the sub-switch circuit (described in detail later)
  • the secondary signal receiving chain or the second secondary signal receiving chain as a result, can transmit the signal of the first main antenna 31 or the second main antenna 32 to the secondary RF front-end module through the peripheral port for reception.
  • the number of peripheral ports can be further expanded.
  • the sub-antenna switch selection module 16 includes a sub-switch circuit, a plurality of sub-receiving ports, a plurality of sub-antenna ports, and a plurality of sub-transmitting ports; in this example, there are three sub-antenna ports, which are called the first sub-antenna ports respectively.
  • Antenna port T21 , second sub-antenna port T22 and third sub-antenna port T23 wherein, the first sub-antenna port T21 is used for connecting the first sub-antenna 33 ; the second sub-antenna port T22 is used for connecting the second sub-antenna 34 .
  • the third sub-antenna port T23 is used to communicate with the above-mentioned first peripheral port AUX1, so that the sub-receiving port can be respectively connected to the first sub-antenna 33, the second sub-antenna 34 or connected to the first main antenna 31 through the third sub-antenna port T23 or the second main antenna 32 .
  • the secondary switch circuit is used to select the secondary antenna port and the secondary receiving port or the secondary transceiver port; that is, the secondary antenna port can be connected to the above-mentioned secondary receiving interface by gating, or the secondary antenna port can be connected to the above-mentioned secondary receiving interface by gating.
  • Secondary transceiver interface ;
  • the secondary receiving port is connected to the multi-band secondary filter 18 of the secondary signal receiving chain, and is used to connect the secondary antenna or the main antenna switch selection module 13 of the main RF front-end module to select and connect the secondary antenna or the main antenna to two secondary signal receiving links; in this example, the secondary receiving port includes a first secondary receiving port R21 and a second secondary receiving port R22; the first secondary receiving port R21 and the second secondary receiving port R22 pass through the internal The secondary switch circuit selects the first secondary antenna port T21, the second secondary antenna port T22 or the third secondary antenna port T23.
  • the secondary transceiver port is used to connect to the main RF front-end module, connect the secondary antenna to the primary antenna switch selection module 13 of the primary RF front-end module, and connect the secondary antenna to the two main signal receiving links.
  • the purpose of the secondary transceiver port is to connect to the main RF front-end module, so that the main RF front-end module can use the first secondary antenna 33 and the second secondary antenna 34; here, there is one secondary transceiver port, called It is the first secondary transceiving port RT21; as a preferred way, a secondary transceiving port can also be added for backup; it is called the second secondary transceiving port RT22.
  • the modulated radio frequency signal is amplified to a sufficient power after passing through the power amplifier 112, and then transmitted through the matching network 113, and then transmitted by the antenna. Therefore, a matching network 113 is connected in series between the power amplifier 112 and the RF transceiver switch 12 ; the matching network 113 is used to perform impedance matching on the amplified RF signal and output it to the RF transceiver switch 12 .
  • the matching network 113 is known to the public and is used to satisfy a specific matching relationship between the load impedance and the internal impedance of the signal source during signal transmission.
  • Impedance matching is related to the overall performance of the system, and achieving matching can optimize the system performance.
  • the concept of impedance matching has a wide range of applications. Impedance matching is common between amplifier circuits at all levels, between amplifier circuits and loads, between signals and transmission circuits, and in the design of microwave circuits and systems, whether active or passive. Matching issues must be considered. Those skilled in the art can obtain the content related to the matching network 113 without extra creative effort. Therefore, it will not be introduced in this example.
  • the two main signal transceiving links include a first main signal transceiving link and a second main signal transceiving link;
  • the first main signal transceiver link includes a first radio frequency power amplifier module 11a, a first radio frequency transceiver switch 12a, and a first main filter 14a;
  • the first RF power amplifier module 11a includes a first low noise amplifier 111a, a first power amplifier 112a and a first matching network 113a; the first power amplifier 112a and the first RF transceiver switch 12a are connected in series with a first matching network 113a; the first low noise amplifier 111a is used to receive the radio frequency signal transmitted from the first radio frequency transceiver switch 12a, amplify it and output it to the radio frequency transceiver module 2; the first power amplifier 112a is used to receive The RF signal sent by the RF transceiver module 2 is amplified and output to the first matching network 113a, and the first matching network 113a is used to perform impedance matching on the amplified RF signal and output it to the first RF transceiver switch 12a;
  • the first main filter 14a is arranged between the main antenna switch selection module 13 and the first radio frequency transceiver switch 12a, and is used to filter the radio frequency signal amplified by the first power amplifier 112a and transmit it to the main antenna
  • the switch selection module 13 or the radio frequency signal received from the main antenna switch selection module 13 is filtered and transmitted to the first low noise amplifier 111a;
  • the second main signal transceiving link includes a second radio frequency power amplifier module 11b, a second radio frequency transceiving switch 12b, and a second main filter 14b;
  • the second RF power amplifier module 11b includes a second low noise amplifier 111b, a second power amplifier 112b and a second matching network 113b; the second power amplifier 112b and the second RF transceiver switch 12b are connected in series with a second power amplifier 112b.
  • the second low-noise amplifier 111b is used to receive the radio frequency signal transmitted from the second radio frequency transceiver switch 12b, amplify it and output it to the radio frequency transceiver module 2;
  • the second power amplifier 112b is used to receive The RF signal sent by the RF transceiver module 2 is amplified and output to the second matching network 113b, and the second matching network 113b is used to perform impedance matching on the amplified RF signal and output it to the second RF transceiver switch 12b;
  • the second main filter 14b is arranged between the main antenna switch selection module 13 and the second radio frequency transceiver switch 12b, and is used to filter the radio frequency signal amplified by the second power amplifier 112b and transmit it to the main antenna
  • the switch selection module 13 or the radio frequency signal received from the main antenna switch selection module 13 is filtered and transmitted to the second low noise amplifier 111b;
  • the first low noise amplifier 111a and the second low noise amplifier 111b are multi-band amplifiers.
  • the first power amplifier 112a is a power amplifier supporting the N77 frequency band or N79
  • the second power amplifier 112b is a power amplifier supporting the N79 frequency band or N77
  • the first low noise amplifier 111a and the first low noise amplifier Both the noise amplifiers 111a can support the amplification of radio frequency signals in the N77 and N79 frequency bands
  • the first main filter 14a and the second main filter 14b are bandpass filters supporting N77 and N79 frequency bands.
  • the main radio frequency front-end module is provided with a first receiving port RX1, a second receiving port RX2, a first transmitting port TX1 and a second transmitting port TX2 for connecting to the radio frequency transceiver module 2;
  • the first receiving port RX1 is set at the output end of the first low noise amplifier 111a; the second receiving port RX2 is set at the output end of the second low noise amplifier 111b; the first transmitting port TX1 is set at the output end of the second low noise amplifier 111b.
  • the second transmission port TX2 is set at the input end of the second power amplifier 112b.
  • the two secondary signal receiving links include a first secondary signal receiving link and a second secondary signal receiving link;
  • the first secondary signal receiving chain includes a fourth low noise amplifier 171 and a first secondary filter 181;
  • the first secondary filter 181 is used to filter the radio frequency signal received by the secondary antenna switch selection module 16 and transmit it to the fourth low noise amplifier 171; the fourth low noise amplifier 171 is used to receive the signal from the first secondary filter.
  • the radio frequency signal transmitted by the device 181 is amplified and output to the radio frequency transceiver module 2;
  • the second secondary signal receiving chain includes a fourth low noise amplifier 172 and a second secondary filter 182;
  • the second sub-filter 182 is used to filter the radio frequency signal received by the sub-antenna switch selection module 16 and transmit it to the fourth low-noise amplifier 172; the fourth low-noise amplifier 172 is used to receive the signal from the second sub-filter
  • the radio frequency signal transmitted by the device 182 is amplified and output to the radio frequency transceiver module 2 .
  • the first sub-filter 181 and the second sub-filter 182 are also band-pass filters supporting the N77 and N79 frequency bands; the fourth low-noise amplifier 171 and the fourth low-noise amplifier 172 can both be Supports the amplification of RF signals in the N77 and N79 frequency bands.
  • the secondary radio frequency front-end module further includes a port selection module 15;
  • the port selection module 15 includes a built-in selection switch, a third receiving port RX3 and a fourth receiving port RX4;
  • the built-in selection switch is used to selectively connect the third receiving port RX3, the fourth receiving port RX4, the first secondary signal receiving link and the second secondary signal receiving link;
  • the third receiving port RX3 and the fourth receiving port RX4 are used to connect to the radio frequency transceiver module 2 .
  • the first main antenna 31 is connected to the first main antenna port T11 through the first external duplexer 311;
  • the second main antenna 32 is connected to the first main antenna port T11 through the first external duplexer 311;
  • Two external duplexers 321 are connected to the second main antenna port T12;
  • the first sub-antenna 33 is connected to the first sub-antenna port T21 through a third external duplexer 331
  • the second sub-antenna 34 is connected to the second sub-antenna through a fourth external duplexer 341 on port T22;
  • the third main antenna port T13 of the main antenna switch selection module 13 is connected to one of the sub transceiver ports (the first sub transceiver port RT21) on the sub antenna switch selection module 16; the main antenna switch selection module 13 One of the peripheral ports (the first peripheral port AUX1 ) is connected to the third sub-antenna port T23 of the sub-antenna switch selection module 16 .
  • the first external duplexer 311 , the second external duplexer 321 , the third external duplexer 331 , and the fourth external duplexer 341 are known to the public, for example, they can be selected
  • the N77 frequency band or the N79 frequency band consists of two groups of band-stop filters. Its function is to isolate the transmitting and receiving signals, filter out interference, and ensure that both receiving and transmitting can work normally at the same time. Avoid transmitting the signal from the unit to the receiver.
  • the first main antenna 31 , the second main antenna 32 , the first sub-antenna 33 , and the second sub-antenna 34 are SRS (English name: Sounding Reference Signal, Chinese name: Sounding Reference Signal) antenna.
  • SRS Sounding Reference Signal
  • the use of the SRS antenna can realize the rotation of the radio frequency signal, and the SRS rotation refers to the physical antenna on which the communication terminal 1000 sends the SRS information.
  • Sending the SRS information by the terminal is one of the ways for the base station to detect the location and channel quality of the terminal.
  • the more antennas that can participate in sending the reference signal the more accurate the channel estimation, and the higher the rate that can be obtained; if only the fixed antenna is sent, other antenna information will be lost, the antenna is not fully utilized, and it is difficult to obtain the highest rate.
  • the RF front-end module architecture in this example can transmit and receive signals in various frequency bands on 4 antennas.
  • the first power amplifier 112a in the first main signal transceiver circuit in the above-mentioned main radio frequency front-end module realizes the transmission of radio frequency signals in the N77 frequency band
  • the second power amplifier 112b in the second main signal transceiver circuit is used. Realize the transmission of radio frequency signals in the N79 frequency band.
  • the radio frequency signal in the frequency band of N77 can pass through the first matching network 113a, the first radio frequency transceiver switch 12a, and the first main filter 14a in the first main signal transceiver circuit, and then the main antenna switch selection module 13 to select the first main antenna. 31, or the second main antenna 32, or the first sub-antenna 33, or the second sub-antenna 34 to send out.
  • the radio frequency signal of the above-mentioned N79 frequency band can pass through the second matching network 113b, the second radio frequency transceiver switch 12b, and the second main filter 14b in the second main signal transceiver circuit, and then the main antenna switch selection module 13 to select the first A main antenna 31, or a second main antenna 32, or a first sub-antenna 33, or a second sub-antenna 34 is sent out.
  • the radio frequency transceiver module 2 When receiving a radio frequency signal, it can receive the radio frequency signal through the first main antenna 31, or the second main antenna 32, or the first sub-antenna 33 and the second sub-antenna 34, and then it can receive the radio frequency signal through various links, Finally, the radio frequency transceiver module 2 is received through the first receiving port RX1, the second receiving port RX2, the third receiving port RX3, and the fourth receiving port RX4.
  • each radio frequency signal is realized by gating each signal link in the main radio frequency front-end module and the secondary radio frequency front-end module.
  • the receiving path of the RF signal is described as follows:
  • the first receiving path the radio frequency signal is received from the first main antenna 31. After entering from the first main antenna port T11, the first main transceiver port RT11 is gated by the main switch circuit. After being filtered by the first main filter 14a, the A radio frequency transceiver switch 12a is transmitted to the first low noise amplifier 111a for amplification, and then output from the first receiving port RX1 to the radio frequency receiving module.
  • the second receiving path the radio frequency signal is received from the first main antenna 31. After entering from the first main antenna port T11, the second main transceiver port RT12 is gated by the main switch circuit, and filtered by the second main filter 14b. The two radio frequency transceiver switches 12b are transmitted to the second low noise amplifier 111b for amplification, and then output to the radio frequency receiving module from the second receiving port RX2.
  • the third and fourth receiving paths the radio frequency signal is received from the first main antenna 31, after entering from the first main antenna port T11, the first peripheral port AUX1 is gated through the main switch circuit, and then the third sub-antenna port T23 passes through the sub-port AUX1.
  • the switch circuit selects the first sub-receiving port R21, it is filtered by the first sub-filter 181, amplified by the fourth low-noise amplifier 171, and then output to the radio frequency receiving module from the third receiving port RX3 or the fourth receiving port RX4.
  • the fifth and sixth receiving paths the radio frequency signal is received from the first main antenna 31, after entering from the first main antenna port T11, the first peripheral port AUX1 is gated through the main switch circuit, and then the third sub-antenna port T23 passes through the sub-switch After the circuit selects the second sub-receiving port R22, it is filtered by the second sub-filter 182, amplified by the fourth low-noise amplifier 172, and then output to the radio frequency receiving module from the third receiving port RX3 or the fourth receiving port RX4.
  • the seventh receiving path the radio frequency signal is received from the second main antenna 32, after entering from the second main antenna port T12, the first main transceiver port RT11 is gated by the main switch circuit, filtered by the first main filter 14a, A radio frequency transceiver switch 12a is transmitted to the first low noise amplifier 111a for amplification, and then output from the first receiving port RX1 to the radio frequency receiving module.
  • the eighth receiving path the radio frequency signal is received from the second main antenna 32, after entering from the second main antenna port T12, the second main transceiver port RT12 is gated by the main switch circuit, filtered by the second main filter 14b, The two radio frequency transceiver switches 12b are transmitted to the second low noise amplifier 111b for amplification, and then output to the radio frequency receiving module from the second receiving port RX2.
  • the ninth and tenth receiving paths the radio frequency signal is received from the second main antenna 32, after entering from the second main antenna port T12, the first peripheral port AUX1 is gated by the main switch circuit, and then the third sub-antenna port T23 passes through the sub-port AUX1.
  • the switch circuit selects the first sub-receiving port R21, it is filtered by the first sub-filter 181, amplified by the fourth low-noise amplifier 171, and then output to the radio frequency receiving module from the third receiving port RX3 or the fourth receiving port RX4.
  • the eleventh and twelfth receiving paths receive the radio frequency signal from the second main antenna 32, after entering from the second main antenna port T12, the first peripheral port AUX1 is gated through the main switch circuit, and then from the third sub-antenna port T23 After the secondary switch circuit selects the second secondary receiving port R22, after being filtered by the second secondary filter 182, it is amplified by the fourth low-noise amplifier 172 and then output to the radio frequency receiving module from the third receiving port RX3 or the fourth receiving port RX4 .
  • the radio frequency signal is received from the first sub-antenna 33, after entering from the first sub-antenna port T21, the first sub-receiving port R21 is gated by the sub-switch circuit, and passes through the first sub-filter 181 After filtering, it is amplified by the fourth low noise amplifier 171 and then output to the radio frequency receiving module from the third receiving port RX3 or the fourth receiving port RX4.
  • the radio frequency signal is received from the first sub-antenna 33, and after entering from the first sub-antenna port T21, the second sub-receiving port R22 is gated by the sub-switch circuit, and passes through the second sub-filter 182 After filtering, it is amplified by the fourth low noise amplifier 172 and then output to the radio frequency receiving module from the third receiving port RX3 or the fourth receiving port RX4.
  • the radio frequency signal is received from the second sub-antenna 34, and after entering from the second sub-antenna port T22, the first sub-receiving port R21 is gated through the sub-switch circuit, and passes through the first sub-filter 181 After filtering, it is amplified by the fourth low noise amplifier 171 and then output to the radio frequency receiving module from the third receiving port RX3 or the fourth receiving port RX4.
  • the radio frequency signal is received from the second sub-antenna 34, after entering from the second sub-antenna port T22, the second sub-receiving port R22 is gated by the sub-switch circuit, and passes through the second sub-filter 182 After filtering, it is amplified by the fourth low noise amplifier 172 and then output to the radio frequency receiving module from the third receiving port RX3 or the fourth receiving port RX4.
  • Twenty-first receiving channel Receive the radio frequency signal from the first secondary antenna 33, enter from the first secondary antenna port T21, select the first secondary transceiver port RT21 through the secondary switch circuit, and enter the primary radio frequency from the third primary antenna port T13
  • the front-end module is gated by the main switch circuit to the first main transceiver port RT11, filtered by the first main filter 14a, transmitted to the first low noise amplifier 111a through the first RF transceiver switch 12a, and then output from the first receiving port RX1 for amplification to the RF receiving module.
  • the radio frequency signal is received from the first sub-antenna 33, after entering from the first sub-antenna port T21, the first sub-transmitting port RT21 is gated through the sub-switch circuit, and the main radio frequency is entered from the third main antenna port T13
  • the front-end module is gated by the main switch circuit to the second main transceiver port RT12, filtered by the second main filter 14b, transmitted to the second low noise amplifier 111b through the second RF transceiver switch 12b, and then amplified from the second receiving port RX2. to the RF receiving module.
  • the radio frequency signal is received from the second sub-antenna 34, after entering from the second sub-antenna port T22, the first sub-transmitting port RT21 is gated through the sub-switch circuit, and the main radio frequency is entered from the third main antenna port T13
  • the front-end module is gated by the main switch circuit to the first main transceiver port RT11, filtered by the first main filter 14a, transmitted to the first low noise amplifier 111a through the first RF transceiver switch 12a, and then output from the first receiving port RX1 for amplification to the RF receiving module.
  • the twenty-fourth receiving channel the radio frequency signal is received from the second sub-antenna 34, after entering from the second sub-antenna port T22, the first sub-transmitting port RT21 is gated through the sub-switch circuit, and the main radio frequency is entered from the third main antenna port T13
  • the front-end module is gated by the main switch circuit to the second main transceiver port RT12, filtered by the second main filter 14b, transmitted to the second low noise amplifier 111b through the second RF transceiver switch 12b, and then amplified from the second receiving port RX2. to the RF receiving module.
  • the above receiving channels indicate that all four antennas can be used as receiving antennas for RF signals. It can receive RF signals through multiple channels through the selection of the main RF switch selection module, the secondary RF switch selection module and the RF transceiver switch. One of a receiving port RX1 , a second receiving port RX2 , a third receiving port RX3 , and a fourth receiving port RX4 is selected for receiving into the radio frequency transceiver module 2 .
  • the transmission path of the RF signal is described as follows:
  • the first transmission path the radio frequency signal of the N77 frequency band sent by the radio frequency transceiver module 2 enters the main radio frequency front-end module through the first radio frequency transmission port, is amplified by the first power amplifier 112a, and is impedance matched by the first matching network 113a.
  • a radio frequency transceiver switch 12 a enters the first main filter 14 a for filtering, and the first main antenna port T11 is gated through the main antenna switch to transmit radio frequency signals from the first main antenna 31 .
  • the second transmission path the radio frequency signal of the N77 frequency band sent by the radio frequency transceiver module 2 enters the main radio frequency front-end module through the first radio frequency transmission port, is amplified by the first power amplifier 112a, and is impedance matched by the first matching network 113a.
  • a radio frequency transceiver switch 12 a enters the first main filter 14 a for filtering, and the second main antenna port T12 is gated through the main antenna switch to transmit radio frequency signals from the second main antenna 32 .
  • the third transmission path the radio frequency signal of the N77 frequency band sent by the radio frequency transceiver module 2 enters the main radio frequency front-end module through the first radio frequency transmission port, is amplified by the first power amplifier 112a, and is impedance matched by the first matching network 113a.
  • a radio frequency transceiver switch 12a enters the first main filter 14a for filtering, selects the third main antenna port T13 through the main antenna switch, enters the secondary radio frequency front-end module from the first secondary transceiver port RT21, and selects the first secondary antenna through the secondary switch circuit
  • the port T21 transmits radio frequency signals from the first pair of antennas 33 .
  • the fourth transmission path the radio frequency signal of the N77 frequency band sent by the radio frequency transceiver module 2 enters the main radio frequency front-end module through the first radio frequency transmission port, is amplified by the first power amplifier 112a, and is impedance matched by the first matching network 113a.
  • a radio frequency transceiver switch 12a enters the first main filter 14a for filtering, selects the third main antenna port T13 through the main antenna switch, enters the secondary radio frequency front-end module from the first secondary transceiver port RT21, and selects the second secondary antenna through the secondary switch circuit
  • the port T22 transmits radio frequency signals from the second antenna 34 .
  • the above-mentioned four transmission channels can realize the rotation of the radio frequency signal of the N77 frequency band.
  • the radio frequency signal of the N79 frequency band sent by the radio frequency transceiver module 2 enters the main radio frequency front-end module through the second radio frequency transmission port, is amplified by the second power amplifier 112b, and is impedance matched by the second matching network 113b.
  • the two radio frequency transceiver switches 12b enter the second main filter 14b for filtering, and the first main antenna port T11 is gated through the main antenna switch to transmit radio frequency signals from the first main antenna 31 .
  • the sixth transmission path the radio frequency signal of the N79 frequency band sent by the radio frequency transceiver module 2 enters the main radio frequency front-end module through the second radio frequency transmission port, is amplified by the second power amplifier 112b, and is impedance matched by the second matching network 113b.
  • the two radio frequency transceiver switches 12b enter the second main filter 14b for filtering, and the second main antenna port T12 is gated through the main antenna switch to transmit radio frequency signals from the second main antenna 32 .
  • the radio frequency signal of the N79 frequency band sent by the radio frequency transceiver module 2 enters the main radio frequency front-end module through the second radio frequency transmission port, is amplified by the second power amplifier 112b, and is impedance matched by the second matching network 113b.
  • the two radio frequency transceiver switches 12b enter the second main filter 14b for filtering, the third main antenna port T13 is gated through the main antenna switch, and the first auxiliary transceiver port RT21 enters the auxiliary RF front-end module, and the first auxiliary antenna is gated through the auxiliary switch circuit.
  • the port T21 transmits radio frequency signals from the first pair of antennas 33 .
  • the radio frequency signal of the N79 frequency band sent by the radio frequency transceiver module 2 enters the main radio frequency front-end module through the second radio frequency transmission port, is amplified by the second power amplifier 112b, and is impedance matched by the second matching network 113b.
  • the two radio frequency transceiver switches 12b enter the second main filter 14b for filtering, the third main antenna port T13 is gated through the main antenna switch, the first sub transceiver port RT21 enters the sub radio frequency front-end module, and the second sub antenna is gated through the sub switch circuit
  • the port T22 transmits radio frequency signals from the second antenna 34 .
  • the above-mentioned four transmission channels can realize the round transmission of the radio frequency signal of the N79 frequency band.
  • the above transmission path shows that its four antennas can be used as transmission antennas for radio frequency signals, and the radio frequency signals are transmitted into the main radio frequency front-end module through the above-mentioned first transmission port TX1 or second transmission port TX2, after amplification, impedance matching, After filtering and other processing, it is finally sent out from the above four antennas.
  • the amplifier unit 19b and the multi-band adjustable filtering unit 19a are arranged in two or more broadband radio frequency processing links 19 in the radio frequency front-end architecture of the antenna module.
  • the amplifier unit 19b and the multi-band adjustable filtering unit 19a are arranged in two or more broadband radio frequency processing links 19 in the radio frequency front-end architecture of the antenna module.
  • the filter in the broadband radio frequency processing link 19 as a multi-band adjustable filtering unit 19a, it supports multiple frequency bands in the same broadband radio frequency processing link 19, and each frequency band can be selected, Due to the range of its frequency band, it reduces the number of broadband radio frequency processing links 19 or the number of radio frequency front-end modules. And since its frequency band can be selected, the bandwidth can be adjusted according to other transmit or receive signal transmission conditions of the broadband radio frequency processing link 19 . For example, the bandwidth supported by the multi-band tunable filtering unit 19 a is adjusted to effectively reduce the interference between the broadband radio processing links 19 by avoiding the transmission or reception of signals in similar frequency bands in other broadband radio processing links 19 .

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Abstract

La présente invention concerne une architecture frontale radiofréquence, un appareil d'antenne et un terminal de communication, destinés à résoudre le problème de l'état de la technique selon lequel une architecture formée par un module frontal radiofréquence est relativement compliquée. L'architecture frontale radiofréquence est pourvue, selon un aspect de la présente demande, de deux liaisons de traitement radiofréquence large bande ou plus, chaque liaison de traitement radiofréquence large bande comprenant une unité d'amplificateur et une unité de filtre réglable multibande. Une unité d'amplificateur et une unité de filtre réglable multibande sont disposées dans deux liaisons de traitement radiofréquence large bande ou plus dans une architecture frontale radiofréquence d'un module d'antenne de sorte que, de cette façon, par exemple dans une application 5G, le terminal de communication peut fonctionner selon différents modes de fonctionnement et peut prendre en charge une transmission de signaux de divers modes différents ; et la structure de l'architecture frontale radiofréquence peut être en outre simplifiée de sorte que la structure du terminal de communication est simplifiée, que la complexité de la conception est réduite et que la surface de l'architecture frontale radiofréquence est réduite.
PCT/CN2021/107485 2020-07-24 2021-07-21 Architecture frontale radiofréquence, appareil d'antenne et terminal de communication WO2022017404A1 (fr)

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