CN117411515A - Multichannel radio frequency front end - Google Patents

Multichannel radio frequency front end Download PDF

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Publication number
CN117411515A
CN117411515A CN202311510000.1A CN202311510000A CN117411515A CN 117411515 A CN117411515 A CN 117411515A CN 202311510000 A CN202311510000 A CN 202311510000A CN 117411515 A CN117411515 A CN 117411515A
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CN
China
Prior art keywords
radio frequency
frequency
switch matrix
different
switch
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
CN202311510000.1A
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Chinese (zh)
Inventor
薛宇飞
王�琦
贾建蕊
卢红丽
刘帆
谌王所
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CETC 54 Research Institute
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CETC 54 Research Institute
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Filing date
Publication date
Application filed by CETC 54 Research Institute filed Critical CETC 54 Research Institute
Priority to CN202311510000.1A priority Critical patent/CN117411515A/en
Publication of CN117411515A publication Critical patent/CN117411515A/en
Pending legal-status Critical Current

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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
    • 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
    • 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
    • H04B1/0067—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 one or more circuit blocks in common for different bands
    • 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
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B1/0475—Circuits with means for limiting noise, interference or distortion
    • 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
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/22—Scatter propagation systems, e.g. ionospheric, tropospheric or meteor scatter
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/42—Loop networks
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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

Abstract

The invention discloses a multichannel radio frequency front end, which relates to the technical field of wireless communication and comprises a low-noise amplifier, a power supply switching control module, a switch matrix and a different-frequency combiner; the first input end of the switch matrix is used for inputting radio frequency signals; the second input end of the switch matrix is connected with the power supply switching control module and is used for receiving a switch switching instruction of the power supply switching control module; the output end of the switch matrix is connected with the input end of the low-noise amplifier, and the output end of the low-noise amplifier is used for outputting signals; the bidirectional end of the switch matrix is connected with the antenna through the inter-frequency combiner and is used for receiving and transmitting signals. The invention makes the networking mode more free, provides more available channels for the signals, forms a plurality of configuration modes through different channel combination configurations, and improves the co-location and co-directional communication capability.

Description

Multichannel radio frequency front end
Technical Field
The invention relates to the technical field of wireless communication, in particular to a multichannel radio frequency front end which is applicable to a scattering communication system for high-power complex networking transmission.
Background
At present, the scattering communication equipment is widely applied, and along with the development of the times, higher requirements are put on the scattering communication equipment and technology, such as high power, miniaturization, free networking and the like. The traditional scattering communication system adopts a two-frequency-band duplexer, can realize point-to-point networking, chain networking, star networking and even-number node annular networking multi-mode networking communication, but can not realize odd-number node annular networking communication, and has limitation in networking mode.
Disclosure of Invention
The invention aims to solve the technical problem that the odd node annular networking communication is realized in the scattering communication, so that the networking mode is more free, more available channels are provided for signals, various configuration modes are formed through different channel combination configurations, and the co-location and co-directional communication capability is improved.
The technical scheme adopted by the invention is as follows:
a multichannel radio frequency front end comprises a low-noise amplifier, a power supply switching control module, a switch matrix and a different-frequency combiner;
the first input end of the switch matrix is used for inputting radio frequency signals;
the second input end of the switch matrix is connected with the power supply switching control module and is used for receiving a switch switching instruction of the power supply switching control module;
the output end of the switch matrix is connected with the input end of the low-noise amplifier, and the output end of the low-noise amplifier is used for outputting signals;
the bidirectional end of the switch matrix is connected with the antenna through the different-frequency combiner and is used for receiving and transmitting signals;
the signal transmission process of the antenna comprises the following steps: the high-power radio frequency signal enters a switch matrix, the power supply switching control module controls the switch matrix to select a correct path through a prefabricated program, the signal is sent into a corresponding transmitting channel of the different-frequency combiner, and the signal is sent out through an antenna after out-of-band stray and interference are filtered;
signal receiving process of antenna: the weak radio frequency receiving signal from the antenna enters the different frequency combiner to correspond to the receiving channel for frequency selection filtering, after the high power transmitting signal and out-of-band interference of the local end are filtered, the weak radio frequency receiving signal enters the switch matrix, the power supply switching control module controls the switch matrix to select a correct path through a prefabricated program, and the receiving signal is sent to the low noise amplifier for amplification and then is sent out.
Further, the switch matrix is formed by cascading radio frequency switches, and the types of the radio frequency switches comprise single-pole double-throw switches and double-pole double-throw radio frequency switches; and flexibly selecting a cascading mode of the radio frequency switch according to networking requirements.
Furthermore, the different-frequency combiner consists of multiple paths of filters, is a multi-port network, and is connected with an antenna at a combining end and shares the same antenna for receiving and transmitting; the different-frequency combiner is of a cavity structure and is used for bearing high-power radio frequency signals, realizing frequency selection and filtering of the radio frequency signals, at least comprising three different frequency band signal transmission channels, and flexibly designing the number of the frequency band transmission channels according to networking requirements.
Further, the different-frequency combiner comprises four transmission channels of signals with different frequency bands, and the switch matrix comprises a single-pole double-throw switch and two double-pole double-throw switches;
the two fixed ends of the single-pole double-throw switch are respectively connected with one movable end of the two double-pole double-throw switches; the movable end of the single-pole double-throw switch is used for radio frequency input;
the two fixed ends of the double-pole double-throw switch I are respectively connected with two transmission channels of the different-frequency combiner; the two fixed ends of the double-pole double-throw switch II are respectively connected with the other two transmission channels of the different-frequency combiner;
the other movable end of the double-pole double-throw switch I outputs radio frequency through a low-noise amplifier I;
the other movable end of the double-pole double-throw switch II outputs through the low-noise amplifier II radio frequency.
The invention has the innovative characteristics that:
1. the different-frequency combiner at least comprises three different-frequency-band signal transmission channels, more available channels are provided for signals, and multiple configuration modes are formed through different channel combination configurations, so that the co-location and co-directional communication capability is improved.
2. The mode that the traditional scattering communication system adopts a two-frequency-band duplexer is changed, and the odd node annular networking communication can be realized by adopting a matching mode of a switch matrix and a different-frequency combiner, so that the networking mode is more flexible and free.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a signal flow diagram of the present invention;
FIG. 2 is a schematic diagram of the operation of the present invention;
figure 3 is a graph of an odd-node ring network employing the principles of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the terms "upper," "lower," "top," "bottom," "one side," "another side," "left," "right," and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience in describing the present invention and simplifying the description, and do not mean that the device or element must have a specific orientation, be configured and operate in a specific orientation.
As shown in figure 1, the invention relates to a multichannel radio frequency front end, which comprises a switch matrix, an inter-frequency combiner, a low-noise amplifier and a power supply switching control module, wherein the working principle of a transmitting channel is as follows: the high-power radio frequency signal enters the switch matrix, the power supply switching control module controls the switch matrix to select a correct path through a prefabricated program, the signal is sent into a corresponding transmitting channel of the different-frequency combiner, and the signal is sent out after out-of-band stray and interference are filtered. The working principle of the receiving channel is as follows: the weak radio frequency receiving signal from the antenna enters the different frequency combiner to correspond to the receiving channel for frequency selection filtering, after the high power transmitting signal and out-of-band interference of the local end are filtered, the weak radio frequency receiving signal enters the switch matrix, the power supply switching control module controls the switch matrix to select a correct path through a prefabricated program, and the receiving signal is sent to the low noise amplifier for amplification and then is sent out.
The selection and switching of the receiving and transmitting channels are controlled by a power supply switching control module, and the receiving and transmitting channels are selected and switched according to the needs by prefabricating a switching control program in the power supply switching control module, wherein the prefabricating program has avoided that an input signal in the figure 1 directly enters a low-noise amplifier to burn out the low-noise amplifier.
Fig. 2 is a schematic diagram of a four-channel different frequency combiner and a corresponding switch matrix, and fig. 2 is described in detail below.
The working principle of the four-channel radio frequency front end is described by taking FI sending and FIII receiving as examples, wherein a single-pole double-throw switch I, a single-pole double-throw switch II, a double-pole double-throw switch I and a double-pole double-throw switch II8 are provided with a solid line path and a dotted line path which can be selected, and the working principle is not real or virtual.
The working principle of the transmitting channel is as follows: the radio frequency input signal FI enters the single-pole double-throw switch I and then is controlled by the power supply switching control module, enters the double-pole double-throw switch I through a dotted line path in the diagram, enters the FI channel of the different-frequency combiner after passing through a solid line path of the double-pole double-throw switch I, and is fed into the antenna after filtering out stray and interference outside the power amplifier.
The working principle of the receiving channel is as follows: the weak radio frequency receiving signal FIII from the antenna enters a FIII channel of the different-frequency combiner, the strong power transmitting signal and out-of-band interference of the local end are filtered, then enter the double-pole double-throw switch I, are controlled by the power supply switching control module, enter the low-noise amplifier II after passing through a solid line path, are amplified, and are sent out through the solid line path of the single-pole double-throw switch II.
The switch matrix is formed by cascading radio frequency switches and comprises a single-pole double-throw switch and a double-pole double-throw switch, and four-channel receiving and transmitting selection and switching are realized through radio frequency cable connection.
The different-frequency combiner consists of four paths of filters with different frequencies, is a 5-port network, the combining end of the different-frequency combiner is connected with an antenna, the four paths of filters and the combining end are of cavity structures, four paths of channels FI, FII, FIII, FIV are provided for signals, the frequency bands are different, compared with the traditional two-frequency-band duplexer, more available channels can be provided for the signals in communication, 12 configuration modes can be formed through different channel combination configurations, and the co-location and co-directional communication capability is improved.
The single pole double throw switch II can be placed before or after low noise amplification, and the noise coefficient of the single pole double throw switch II is about 0.5dB less than that of the single pole double throw switch II after low noise amplification.
The low-noise amplifier selects amplitude limiting low-noise amplifier, and the low-noise amplifier can be protected from being burnt by large signals to a certain extent.
The switch matrix is formed by cascading radio frequency switches, including but not limited to single-pole double-throw and double-pole double-throw radio frequency switches, and the switch matrix cascading mode can be flexibly selected according to different networking requirements.
The different-frequency combiner consists of multiple paths of filters, is a multi-port network, the combining ends of the different-frequency combiner are connected with antennas, the transceivers share the same antenna, the different-frequency combiner is of a cavity structure, can bear high-power radio frequency signals, realizes frequency selection filtering of the radio frequency signals, at least comprises three different-frequency-band signal transmission channels, and can flexibly design the number of the frequency-band transmission channels according to different networking requirements.
The power supply switching control module supplies power to the switch matrix, and the selection and switching of the receiving and transmitting channels of the switch matrix are controlled through a prefabricated program.
The four-channel radio frequency front end can provide four channels for signals, and the odd-numbered node annular networking in figure 3 can be realized by adopting any three channels of signals.
In fig. 3, ABC represents two sets of equipment in each station, a station may transmit FI signals to a BC station at the same time, receive FII and FIII signals transmitted by the BC station, and similarly B station may transmit FII signals to an AC station at the same time, receive FI and FIII signals transmitted by the AC station, and C station may generate FIII signals to an AB station at the same time, and receive FI and FII signals transmitted by the AB station, so that odd node ring networking may be implemented.
To sum up, the working principle and the generated beneficial effects of the multi-channel radio frequency front end of the invention are explained by taking the 4-channel radio frequency front end as an embodiment: 1. by adopting the different-frequency combiner, more available channels can be provided for the signals, and multiple configuration modes are formed through different channel combination configurations, so that the co-location and co-directional communication capability is improved; 2. the method changes the mode that the traditional scattering communication system adopts a two-frequency-band duplexer, adopts the matching mode of a switch matrix and a different-frequency combiner, realizes the odd node annular networking communication, and ensures that the networking mode is more flexible and free. However, the multi-channel radio frequency front end is not limited to a 4-channel radio frequency front end, and the number of channels can be flexibly designed according to the needs to meet the system requirements.

Claims (4)

1. The multichannel radio frequency front end comprises a low-noise amplifier and a power supply switching control module, and is characterized by further comprising a switch matrix and a different-frequency combiner;
the first input end of the switch matrix is used for inputting radio frequency signals;
the second input end of the switch matrix is connected with the power supply switching control module and is used for receiving a switch switching instruction of the power supply switching control module;
the output end of the switch matrix is connected with the input end of the low-noise amplifier, and the output end of the low-noise amplifier is used for outputting signals;
the bidirectional end of the switch matrix is connected with the antenna through the different-frequency combiner and is used for receiving and transmitting signals;
the signal transmission process of the antenna comprises the following steps: the high-power radio frequency signal enters a switch matrix, the power supply switching control module controls the switch matrix to select a correct path through a prefabricated program, the signal is sent into a corresponding transmitting channel of the different-frequency combiner, and the signal is sent out through an antenna after out-of-band stray and interference are filtered;
signal receiving process of antenna: the weak radio frequency receiving signal from the antenna enters the different frequency combiner to correspond to the receiving channel for frequency selection filtering, after the high power transmitting signal and out-of-band interference of the local end are filtered, the weak radio frequency receiving signal enters the switch matrix, the power supply switching control module controls the switch matrix to select a correct path through a prefabricated program, and the receiving signal is sent to the low noise amplifier for amplification and then is sent out.
2. The multi-channel rf front-end of claim 1, wherein the switch matrix is comprised of a cascade of rf switches, the types of rf switches including single pole double throw switches and double pole double throw rf switches; and flexibly selecting a cascading mode of the radio frequency switch according to networking requirements.
3. The multi-channel rf front-end of claim 1, wherein the different-frequency combiner is composed of multiple filters, and is a multi-port network, and the combined ends are connected with antennas and share the same antenna; the different-frequency combiner is of a cavity structure and is used for bearing high-power radio frequency signals, realizing frequency selection and filtering of the radio frequency signals, at least comprising three different frequency band signal transmission channels, and flexibly designing the number of the frequency band transmission channels according to networking requirements.
4. A multi-channel rf front-end as claimed in claim 3, wherein the inter-frequency combiner comprises four different frequency band signal transmission channels, the switch matrix comprising a single pole double throw switch and two double pole double throw switches;
the two fixed ends of the single-pole double-throw switch are respectively connected with one movable end of the two double-pole double-throw switches; the movable end of the single-pole double-throw switch is used for radio frequency input;
the two fixed ends of the double-pole double-throw switch I are respectively connected with two transmission channels of the different-frequency combiner; the two fixed ends of the double-pole double-throw switch II are respectively connected with the other two transmission channels of the different-frequency combiner;
the other movable end of the double-pole double-throw switch I outputs radio frequency through a low-noise amplifier I;
the other movable end of the double-pole double-throw switch II outputs through the low-noise amplifier II radio frequency.
CN202311510000.1A 2023-11-14 2023-11-14 Multichannel radio frequency front end Pending CN117411515A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311510000.1A CN117411515A (en) 2023-11-14 2023-11-14 Multichannel radio frequency front end

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311510000.1A CN117411515A (en) 2023-11-14 2023-11-14 Multichannel radio frequency front end

Publications (1)

Publication Number Publication Date
CN117411515A true CN117411515A (en) 2024-01-16

Family

ID=89492463

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311510000.1A Pending CN117411515A (en) 2023-11-14 2023-11-14 Multichannel radio frequency front end

Country Status (1)

Country Link
CN (1) CN117411515A (en)

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