WO2023197959A1 - Multiplexeur et dispositif radiofréquence - Google Patents

Multiplexeur et dispositif radiofréquence Download PDF

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Publication number
WO2023197959A1
WO2023197959A1 PCT/CN2023/087015 CN2023087015W WO2023197959A1 WO 2023197959 A1 WO2023197959 A1 WO 2023197959A1 CN 2023087015 W CN2023087015 W CN 2023087015W WO 2023197959 A1 WO2023197959 A1 WO 2023197959A1
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WO
WIPO (PCT)
Prior art keywords
filter
radio frequency
multiplexer
port
filters
Prior art date
Application number
PCT/CN2023/087015
Other languages
English (en)
Chinese (zh)
Inventor
张文刚
Original Assignee
中兴通讯股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Publication of WO2023197959A1 publication Critical patent/WO2023197959A1/fr

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Classifications

    • 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
    • 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
    • H04B1/0003—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain
    • H04B1/0007—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain wherein the AD/DA conversion occurs at radiofrequency or intermediate frequency stage
    • H04B1/0017—Digital filtering
    • 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
    • H04B1/005—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 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
    • H04B1/0053—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 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band
    • H04B1/006—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 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band using switches for selecting the desired band
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex

Definitions

  • the present disclosure relates to the field of communication technology, and in particular to a multiplexer and a radio frequency device.
  • a multiplexer (including a duplexer) is a multi-port combination splitter device used to connect multiple ports to another port to achieve synchronous transmission of multiple (2 or more) radio frequency signals.
  • multiplexers have complex structures and high costs.
  • the present disclosure provides a multiplexer and radio frequency equipment.
  • an embodiment of the present disclosure provides a multiplexer, which includes: a first port; a plurality of second ports; a radio frequency switch, which includes a common terminal and a plurality of input and output IO terminals, and the common terminal is connected to the first port; the radio frequency switch is used to independently control whether each of the IO terminals and the common terminal is connected; and a plurality of filters, each of the filters is connected to one of the second ports and one of between the IO terminals.
  • an embodiment of the disclosure provides a radio frequency device, which includes a multiplexer according to the first aspect of the disclosure.
  • Figure 1 is a block diagram of a multiplexer provided by an embodiment of the present disclosure
  • Figure 2 is a block diagram of another multiplexer provided by an embodiment of the present disclosure.
  • Figure 3 is a schematic diagram of part of the circuit structure and radio frequency signal transmission in yet another multiplexer provided by an embodiment of the present disclosure
  • Figure 4 is a block diagram of a radio frequency device provided by an embodiment of the present disclosure.
  • FIG. 5 is a block diagram of another radio frequency device provided by an embodiment of the present disclosure.
  • plan and/or cross-sectional illustrations are schematic illustrations of the disclosure. Accordingly, example illustrations may be modified based on manufacturing techniques and/or tolerances.
  • the present disclosure is not limited to the embodiments shown in the drawings but includes modifications of configurations formed based on manufacturing processes. Accordingly, the regions illustrated in the figures are of a schematic nature and the shapes of the regions shown in the figures are illustrative of the specific shapes of regions of the element and are not intended to be limiting.
  • a multiplexer is a multi-port combination branching device used to connect multiple ports (second port) to another port (first port) to achieve synchronous transmission of multiple (2 or more) radio frequency signals. .
  • a multiplexer can be used to connect joints of multiple subcircuits of a radio frequency processing circuit (used to process radio frequency signals) with an antenna (used to receive and transmit radio frequency signals) in a radio frequency device.
  • each channel in the multiplexer is actually implemented through a filter. Since multiple filters need to be installed in a small space of the multiplexer device, it is easy to connect the filters to each other. produce mutual interference.
  • embodiments of the present disclosure provide a multiplexer.
  • the multiplexer of the embodiment of the present disclosure includes: a first port; a plurality of second ports; a radio frequency switch, which includes a common terminal and a plurality of input and output IO terminals, and the common terminal is connected to the first port ;
  • the radio frequency switch is used to independently control whether each IO terminal is connected to the common terminal; multiple filters, each filter is connected between a second port and an IO terminal.
  • the multiplexer in the embodiment of the present disclosure includes a first port (single-ended) and a plurality of second ports (multi-port), which are used to realize the connection between the plurality of second ports and the first port, that is, to realize multiplexing Synchronous transmission of radio frequency signals (each second port corresponds to one radio frequency signal).
  • a first port single-ended
  • a plurality of second ports multi-port
  • the number of second ports, IO ports and filters are each three.
  • the multiplexer in the embodiment of the present disclosure also includes a radio frequency switch.
  • the radio frequency switch has multiple IO terminals (input/output terminals) and a common terminal, and can independently control each IO terminal and
  • the common terminal is on or off, that is, the connection status between each IO terminal of the radio frequency switch and the common terminal is independent and is not affected by the connection status between other IO terminals and the common terminal.
  • the common end of the RF switch is connected to the first port of the multiplexer, and each of its IO ends is connected to a second port of the multiplexer through a filter.
  • each filter forms a channel and can The radio frequency signals in the paths are filtered, and the first port of the multiplexer is connected to each path through the radio frequency switch.
  • each filter is used to filter a certain frequency range (that is, to filter out noise in a specific frequency range and allow waves in a specific frequency range to pass through), and in the multiplexer of the embodiment of the present disclosure, each filter The frequency range corresponding to each filter is preset according to the frequency range of the radio frequency signal entering the corresponding channel, and the frequency range corresponding to each filter The rate ranges can be the same or different.
  • the multiplexer in the embodiment of the present disclosure is provided with a multi-pole radio frequency switch, and the radio frequency switch itself has the ability to ensure high isolation between its IO terminals. Therefore, the isolation between the filters connected to each IO terminal is The isolation is higher and mutual interference is less likely to occur (for example, the second harmonic interference between filters is smaller). Therefore, conventional designs for each filter can also ensure high isolation, and mature selections can be made within a wider range.
  • the number, function (such as the frequency range corresponding to the channel, the direction of radio frequency signal transmission), etc., that is, the function of the multiplexer is "optional" and has good versatility.
  • the number of second ports is 2; the number of filters is 2.
  • a duplexer is a common form of multiplexer that can be used to combine the transmitting subcircuit (the subcircuit used to provide the RF signal to be transmitted) and the receiving subcircuit (used to process the received RF signal) in the RF processing circuit. Signal sub-circuit) and antenna connection and other scenarios.
  • the number of second ports is greater than or equal to 3; the number of filters is greater than or equal to 3.
  • the multiplexer there may also be three or more channels in the multiplexer (that is, the number of second ports and filters may be three or more). Therefore, the multiplexer Specifically, it can be in the form of "three-worker”, “four-worker”, etc.
  • a multiplexer such as a duplexer
  • a separate filter circuit for example, if at a certain moment, in a triplexer, If only two paths are actually connected, it is actually functionally equivalent to a duplexer.
  • the specific conduction status between the IO terminal and the common terminal in the radio frequency switch can be selected according to the needs of the specific application environment at that time, and will not be described in detail here.
  • the radio frequency switch is a radio frequency switch with a multi-on function.
  • the radio frequency switch can have a "Multi-on" function.
  • the Multi-on function is an existing function of the radio frequency switch, which can ensure a high degree of isolation. In this case, simultaneous conduction between multiple IO terminals and the common terminal of the radio frequency switch is achieved.
  • the filter includes a single pass filter.
  • a single-channel filter can be used.
  • At least one filter is a unidirectional filter
  • the first end of at least one unidirectional filter is connected to an IO end, and the second end is connected to a second port; the unidirectional filter is used to filter the radio frequency signal from the IO end, and output the radio frequency signal in a predetermined frequency range to Second port;
  • the first end of at least one unidirectional filter is connected to a second port, and the second end is connected to an IO end; the unidirectional filter is used to filter the radio frequency signal from the second port, and filter the radio frequency signal in a predetermined frequency range. Output to IO terminal.
  • At least one filter is a bidirectional filter; the first end of each bidirectional filter is connected to a The IO end is connected, and the second end is connected to a second port.
  • the filter in each channel in the embodiment of the present disclosure may be a unidirectional filter or a bidirectional filter.
  • the first end (input end) can be connected to the IO end, and the second end (output end) can be connected to the second port, so that the one-way filter can perform a predetermined frequency on the radio frequency signal from the IO end.
  • Range filtering, and the filtered radio frequency signal is output to the second port to be output from the second port to the outside of the multiplexer.
  • the first end (input end) of the one-way filter can also be connected to the second port, and the second end (output end) is connected to the IO end, so that the one-way filter can predetermine the radio frequency signal from the second port.
  • Filtering in the frequency range outputs the filtered RF signal to the IO terminal to be output from the IO terminal to the outside of the multiplexer.
  • the path using a one-way filter is also "one-way". Only when there is an RF signal input at its specific end (the first end of the filter), the filtered RF signal can be output from the other end.
  • the first end of the bidirectional filter is connected to the IP end, and the second end is connected to the second port.
  • a bidirectional filter when there is a radio frequency signal input at either end (the first end or the second end), that end is the input end, and the other end is the output end (the first end and the second end of the bidirectional filter are opposite ), thus, the bidirectional filter can filter the radio frequency signals from both ends in a predetermined frequency range. That is, the path using a bidirectional filter is also "bidirectional". When a radio frequency signal is input at any end, a filtered radio frequency signal in a predetermined frequency range can be output from the other end.
  • the transmission directions of RF signals in different channels of the multiplexer can be different.
  • Some channels can input RF signals from the second port, some channels can output RF signals from the second port, and some channels can output RF signals from the second port.
  • the channel can be a time-sharing input/output radio frequency signal from the second port. Therefore, there is no necessary correspondence between the first port and the second port of the multiplexer and the input end, output end, etc.
  • each filter is used to output a radio frequency signal in a predetermined frequency range after filtering; the predetermined frequency ranges of different filters are the same or different.
  • the filters of different channels are independent of each other, so the "predetermined frequency range" corresponding to the filters of different channels can be the same or different.
  • the filtering (first filtering and second filtering) performed on the radio frequency signals input from different ends may correspond to the same predetermined frequency range, or may correspond to different predetermined frequency ranges.
  • the filter includes at least one of a surface acoustic wave SAW filter, a bulk acoustic wave BAW filter, a film cavity acoustic resonance FBAR filter, and a low temperature co-fired ceramic LTCC filter.
  • the filter in the embodiment of the present disclosure can be selected from SAW (Surface Acoustic Wave) filter, BAW (Bulk Acoustic Wave) filter, FBAR (Film Bulk Acoustic Resonator) filter, LTCC (Low Temperature Co-fired Ceramic) Filters and other forms will not be described in detail here.
  • SAW Surface Acoustic Wave
  • BAW Bulk Acoustic Wave
  • FBAR Fin Bulk Acoustic Resonator
  • LTCC Low Temperature Co-fired Ceramic
  • the radio frequency signal frequency range used in communication technology is usually between 600MHz and 2700MHz, and there are a large number of operating frequency bands.
  • SAW filters can be used in intermediate frequency scenarios
  • BAW filters, FBAR filters, etc. can be used if the channel corresponds to intermediate frequency scenarios and high frequency scenarios.
  • the filter complies with at least one of a time division duplex TDD system and a frequency division duplex FDD system.
  • a filter in the TDD (Time Division Duplexing) format can be used.
  • TDD Time Division Duplexing
  • FDD Frequency Division Duplexing
  • FIG. 3 shows part of the circuit structure and the transmission situation of radio frequency signals in a specific multiplexer according to an embodiment of the present disclosure.
  • the multiplexer in the embodiment of the present disclosure is specifically a triplexer with 3 channels, including 3 filters (filter-1 filter, filter-2 filter, filter-2 filter) and 3 second port (not shown in the figure), and the three filters are respectively connected to the three IO terminals (IO-1 terminal, IO-2 terminal, IO-3 terminal) of the radio frequency switch.
  • the IO-1 terminal is connected to the filter-1 filter, which is a one-way filter used to input radio frequency signals to the IO-1 terminal; and the IO-2 terminal is connected to the filter-2 filter, which It is a one-way filter used to receive the radio frequency signal output from the IO-2 terminal; and connected to the IO-3 terminal is the filter-3 filter, which can be used to input radio frequency signals to the IO-3 terminal and can also be used to receive Bidirectional filter for the radio frequency signal output from IO-3 terminal (further bidirectional filter that complies with TDD standard).
  • the paths in the triplexer of the embodiment of the present disclosure specifically include the following three transmission paths:
  • the transmission path that is, the path where the Filter-1 filter is located, is used to receive radio frequency signals with a frequency range of F(1 ⁇ ) (such as the radio frequency signal output by the radio frequency chip).
  • the radio frequency signal is filtered out by the Filter-1 filter.
  • the wave is then sent to the IO-1 end of the radio frequency switch, and after passing through the radio frequency switch, a radio frequency signal with a frequency range of F (1 ⁇ ) is output from the first port (not shown in the figure). Specifically, it can be input to the antenna for transmission, or It can be the next step of radio frequency signal processing.
  • the receiving path is the path where the Filter-2 filter is located.
  • the common terminal of the radio frequency switch receives a radio frequency signal with a frequency range of F(1,2,...,n), it is sent to the Filter through the IO-2 terminal.
  • -2 filter to filter out clutter, and finally output the radio frequency signal with the frequency range F(2) to the radio frequency processing circuit (such as radio frequency chip) for subsequent processing.
  • the receiving/transmitting path is the path where the Filter-3 filter is located.
  • the Filter-3 filter is a bidirectional filter that complies with the TDD standard, which ensures that transmitting and receiving share one path, which means that the receiving workflow (to be The radio frequency signal with the frequency range F(n ⁇ ) is converted into the radio frequency signal with the frequency range F(n) and output from the first port), the transmission workflow is divided into (i.e. the frequency range is F(1,2,...,n) The radio frequency signal is converted into a radio frequency signal with a frequency range of F(n) and output from the second port) time-sharing operation.
  • the specific process corresponds to the separate working process of the above transmitting channel and receiving channel, so no details are given here. describe.
  • an embodiment of the present disclosure provides a radio frequency device, which includes: any multiplexer according to the embodiment of the present disclosure.
  • the radio frequency device in the embodiment of the present disclosure refers to a device with radio frequency communication function, and includes the above multiplexer.
  • the radio frequency device of the embodiment of the present disclosure may also include a radio frequency processing circuit (such as a radio frequency chip) for processing radio frequency signals, and an antenna for receiving and/or transmitting radio frequency signals, and the above multiplexer may be connected to between the RF processing circuit and the antenna.
  • a radio frequency processing circuit such as a radio frequency chip
  • an antenna for receiving and/or transmitting radio frequency signals
  • the radio frequency device is a communication terminal.
  • the radio frequency device may be a communication terminal, that is, a terminal device with communication functions, such as a mobile phone, a tablet, a laptop, a navigator, a smart TV, and an Internet of Things (IoT) terminal. wait.
  • a communication terminal that is, a terminal device with communication functions, such as a mobile phone, a tablet, a laptop, a navigator, a smart TV, and an Internet of Things (IoT) terminal. wait.
  • IoT Internet of Things
  • radio frequency device in the embodiment of the present disclosure is not limited to this.
  • it may also be a device used in a base station.
  • Example embodiments have been disclosed, and although specific terms are employed, they are used and should be interpreted in a general illustrative sense only and not for purpose of limitation. In some instances, it will be apparent to those skilled in the art that features, characteristics and/or elements described in connection with a particular embodiment may be used alone, or may be used in conjunction with other embodiments, unless expressly stated otherwise. Features and/or components used in combination. Accordingly, it will be understood by those skilled in the art that various changes in form and details may be made without departing from the scope of the present disclosure as set forth in the appended claims.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Transceivers (AREA)

Abstract

La présente divulgation concerne un multiplexeur, comprenant : un premier port ; une pluralité de seconds ports ; un commutateur radiofréquence, comprenant une extrémité commune et une pluralité d'extrémités d'entrée/sortie (ES), l'extrémité commune étant connectée au premier port, et le commutateur radiofréquence étant utilisé pour commander indépendamment si chaque extrémité ES est connectée à l'extrémité commune ; et une pluralité de filtres, chaque filtre étant connecté entre l'un des seconds ports et l'une des extrémités ES. La présente divulgation concerne en outre un dispositif radiofréquence.
PCT/CN2023/087015 2022-04-11 2023-04-07 Multiplexeur et dispositif radiofréquence WO2023197959A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202210374832.4A CN116938429A (zh) 2022-04-11 2022-04-11 多工器、射频设备
CN202210374832.4 2022-04-11

Publications (1)

Publication Number Publication Date
WO2023197959A1 true WO2023197959A1 (fr) 2023-10-19

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040235549A1 (en) * 2003-05-21 2004-11-25 Wayne Struble Individually biased transistor high frequency switch
CN102684732A (zh) * 2011-03-04 2012-09-19 株式会社村田制作所 高频开关模块
CN111095793A (zh) * 2017-09-08 2020-05-01 株式会社村田制作所 多工器、高频前端电路以及通信装置
CN111342815A (zh) * 2020-04-16 2020-06-26 河北德海电子科技有限公司 一种c波段混传多工器
CN111416633A (zh) * 2018-12-19 2020-07-14 株式会社村田制作所 射频模块和通信装置
CN215990786U (zh) * 2021-10-15 2022-03-08 深圳飞骧科技股份有限公司 一种覆盖多频段的射频前端模块及无线通信设备

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040235549A1 (en) * 2003-05-21 2004-11-25 Wayne Struble Individually biased transistor high frequency switch
CN102684732A (zh) * 2011-03-04 2012-09-19 株式会社村田制作所 高频开关模块
CN111095793A (zh) * 2017-09-08 2020-05-01 株式会社村田制作所 多工器、高频前端电路以及通信装置
CN111416633A (zh) * 2018-12-19 2020-07-14 株式会社村田制作所 射频模块和通信装置
CN111342815A (zh) * 2020-04-16 2020-06-26 河北德海电子科技有限公司 一种c波段混传多工器
CN215990786U (zh) * 2021-10-15 2022-03-08 深圳飞骧科技股份有限公司 一种覆盖多频段的射频前端模块及无线通信设备

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