CN217935611U - Radio frequency channel configuration unit, radio frequency front end module, radio frequency system and electronic equipment - Google Patents

Abstract

The embodiment of the application provides a radio frequency channel configuration unit, a radio frequency front-end module, a radio frequency system and electronic equipment, wherein the radio frequency channel configuration unit comprises a first switch module and a trap network, a first interface side of the first switch module is provided with at least two first interfaces, and a second interface side of the first switch module is provided with at least one second interface; the notch network comprises at least two notch units for transmitting radio frequency signals of different frequency bands, the number of the first interfaces is larger than or equal to that of the notch units, the notch units are provided with pass bands matched with the transmitted radio frequency signals and are correspondingly connected with one first interface, and each first interface is configured to be selectively connected with each second interface to form a plurality of radio frequency paths. The radio frequency channel configuration unit can reduce insertion loss of a radio frequency front-end module and a radio frequency system while realizing radio frequency signal combination or single-state transmission of different frequency bands.

Description

Radio frequency channel configuration unit, radio frequency front end module, radio frequency system and electronic equipment

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to a radio frequency path configuration unit, a radio frequency front end module, a radio frequency system, and an electronic device.

Background

With the continuous development of technology, fifth Generation mobile communication (5G) system has been widely used.

At present, to meet the use of networks with different technical standards, electronic devices with multiple frequencies and multiple modes are increasingly widely used. With the requirement of the 5G standard for the specification of multi-band multiple input multiple output (mimo) and Dual connection link (endec) of the electronic device, the electronic device generates a frequency requirement of multi-band and multi-mode. Under the design that the appearance of electronic equipment such as cell-phone etc. is more and more exquisite, the quantity of radiator such as antenna on the cell-phone also becomes more and more extremely, under the condition that satisfies the antenna isolation, makes the quantity of antenna on the cell-phone severely restricted, consequently, the wireless communication system conduction end of electronic equipment need set up a large amount of combiners in the radio frequency channel of radio frequency front end module to satisfy the radio frequency signal of multiple different frequency channels and in the combination demand of radio frequency front end module, make the radio frequency signal of multiple different frequency channels share an antenna.

However, the presence of the combiner adds additional insertion loss to the radio frequency channel, which affects the insertion loss of the radio frequency front end module, and even when it is not necessary to share one antenna for two frequency bands, the insertion loss added to the radio frequency channel by the combiner cannot be reduced.

SUMMERY OF THE UTILITY MODEL

The application provides a radio frequency path configuration unit, a radio frequency front-end module, a radio frequency system and an electronic device, which can reduce the insertion loss of the radio frequency front-end module and the radio frequency system while realizing the combination or the single-state transmission of radio frequency signals of different frequency bands.

In a first aspect, an embodiment of the present application provides a radio frequency path configuration unit, where the radio frequency path configuration unit includes a first switch module and a notch network, the first switch module is a multi-way selective switch, the first switch module has a first interface side and a second interface side, the first interface side has at least two first interfaces, and the second interface side has at least one second interface;

the notch network comprises at least two notch units, the number of the first interfaces is greater than or equal to that of the notch units, different notch units in the notch network are used for transmitting radio frequency signals of different frequency bands, and the notch units are provided with pass bands matched with the transmitted radio frequency signals;

each notch unit is correspondingly connected with one first interface, each first interface is configured to be selectively connected with each second interface so as to form a plurality of radio frequency paths for radio frequency signal transmission, and each radio frequency path comprises at least one of a combining path and a single path.

The radio frequency channel configuration unit of the embodiment of the application is provided with the first switch module and the notch network, because the first switch module is a multi-way selection switch, the first switch module is provided with two first interfaces and at least one second interface, the notch network comprises at least two radio frequency signal notch units for transmitting different frequency bands, each notch unit is provided with a passband matched with a transmitted radio frequency signal, each notch unit is correspondingly connected with one first interface, and each first interface is configured to be selectively connected with each second interface. Therefore, when radio-frequency signals of different frequency bands are transmitted to the notch unit in the notch network, a combined path or a single-path can be formed by controlling the selective communication of a first interface connected with the notch unit and the same or different second interface in the first switch module according to the transmission requirements of the radio-frequency signals of different frequency bands, so that the radio-frequency signals of different frequency bands are transmitted in a single-path manner in the single-path, or the radio-frequency signals of different frequency bands are transmitted in a combined manner in the combined path, so that the combined requirements of at least two radio-frequency signals of different frequency bands in the radio-frequency front-end module are met, the insertion loss of the radio-frequency path configuration unit in the radio-frequency front-end module can be effectively reduced while at least two different frequency bands share one antenna, and particularly the insertion loss of the radio-frequency path configuration unit in the radio-frequency front-end module when the radio-frequency signals of different frequency bands are transmitted in the single-path manner in the single-path, so that the single-state high-performance transmission of the radio-frequency signals in the radio-frequency path configuration unit is achieved. In addition, the radio frequency path configuration unit of the embodiment can also help to realize the multi-combination multi-band combining function in a wide frequency range, reduce the technical requirements on the manufacturing process, and help to reduce the occupied space of the radio frequency front-end module on the circuit board of the electronic equipment.

In an alternative embodiment, the notching unit is configured to notch the transmitted radio frequency signal to block the radio frequency signal corresponding to the stop band of the notching unit from passing through, the notching unit has a suppression ratio of less than or equal to 10db for the radio frequency signal corresponding to the self-notching frequency point, and the stop band of the notching unit includes the notching frequency point.

Therefore, the notch frequency point of the notch unit can be far away from the notch unit, so that when radio-frequency signals of different frequency bands are transmitted in the radio-frequency path configuration unit in a single-state mode in a single-pass path, the insertion loss can be low, and the single-state high-performance transmission of the radio-frequency signals in the frequency path configuration unit is realized.

In an alternative embodiment, the notch network comprises at least two of a first notch unit, a second notch unit and a third notch unit, the radio frequency signals comprise at least two of a first radio frequency signal, a second radio frequency signal and a third radio frequency signal with different frequency bands;

the first notch unit is provided with a first passband corresponding to the frequency band of the first radio-frequency signal and a first stopband corresponding to the frequency bands of the second radio-frequency signal and the third radio-frequency signal; the second notch unit is provided with a second passband corresponding to the frequency band of the second radio-frequency signal and a second stopband corresponding to the frequency bands of the first radio-frequency signal and the third radio-frequency signal; the third notch unit has a third pass band corresponding to a frequency band for the third radio frequency signal and a third stop band corresponding to the frequency bands of the first radio frequency signal and the second radio frequency signal.

Therefore, through the arrangement of the first notch unit, the second notch unit and the third notch unit, the radio-frequency signals of the frequency band corresponding to the stop band of the radio-frequency transmitter can be restrained at a high rate, the radio-frequency signals of the frequency band corresponding to the pass band of the radio-frequency transmitter are guaranteed to have low insertion loss, and the single-state high-performance transmission performance of the radio-frequency access configuration unit and the radio-frequency front-end module is improved.

In an optional embodiment, the combining path has a common transmission end and at least two branch transmission ends, the branch transmission ends are both communicated with the common transmission end, and the radio frequency signals of different frequency bands are transmitted to the common transmission end through different branch transmission ends to form a combined signal.

Therefore, the requirement of combining radio-frequency signals of different frequency bands in a radio-frequency front-end module is met, and meanwhile, the single-state high-performance transmission of the radio-frequency signals in the frequency channel configuration unit can be ensured.

In an alternative embodiment, the second interface side has at least two second interfaces, the number of second interfaces being greater than or equal to the number of notch units.

Therefore, a plurality of radio frequency signals transmitted to the radio frequency path configuration unit through the first interface can be ensured to have corresponding single-pass paths in the radio frequency path configuration unit, so that the radio frequency signals can be ensured to be transmitted in the radio frequency path configuration unit in a single-state high-performance mode.

In an optional embodiment, when at least two notch units are communicated with the same second interface through corresponding first interfaces, the second interface and the notch units form a combined path through the first interfaces.

Therefore, according to the transmission requirements of the radio-frequency signals of different frequency bands, the connection of the first interfaces and the second interfaces in different quantities can be controlled, and a combining passage with different combining requirements is formed, so that the combining requirements of the radio-frequency signals of at least two different frequency bands are met, and the radio-frequency signals of a plurality of different frequency bands can share one antenna.

In an alternative embodiment, when at least two notch units are respectively communicated with different second interfaces through corresponding first interfaces, the notch units, the first interfaces and the second interfaces are sequentially connected to form a single channel.

Therefore, according to the transmission requirements of the radio frequency signals of different frequency bands, the connection between the first interface and the second interface can be controlled to form a single-pass channel, and therefore the single-state transmission requirements of the radio frequency signals of different frequency bands in the radio frequency channel configuration unit are met.

In an optional implementation manner, the first switch module has a plurality of first interfaces, and the number of the first interfaces is greater than or equal to the number of the second interfaces.

Therefore, the structure of the first switch module can be diversified, and the radio-frequency signals of different frequency bands can be transmitted in various combinations.

In an alternative embodiment, the trap has a first connection side with at least one first port and a second connection side with one second port, the trap being connected to the first interface via the second port, the second port being configured to be selectively connectable to each of the first ports when the first connection side has at least two first ports.

Thus, the arrangement that the at least two first ports and the second port are configured to be selectively connected with each first port is beneficial to enabling the radio frequency path configuration unit to form combiners or multiplexers in different combination forms while ensuring that the radio frequency path configuration unit supports the single-state high-performance transmission of radio frequency signals in different frequency bands, so as to meet the requirements of more transmission combinations of the radio frequency signals in different frequency bands.

In an alternative embodiment, the trap unit comprises a trap assembly comprising at least one trap, the trap having a first connection on a first connection side, the first connection forming a first port, the trap having a second connection on a second connection side, the trap being connected to the first interface via the second connection, the trap having a passband adapted to the transmitted radio frequency signal.

This ensures that the trap can trap radio frequency signals outside the transmitted frequency band, so as to ensure that the transmitted radio frequency signals have small insertion loss when passing through.

In an optional embodiment, the trap assembly includes at least two traps, the trap unit includes a second switch module, the second switch module has a third interface side and a fourth interface side, the third interface side has a third interface, the number of the third interfaces is greater than or equal to the number of the traps in the trap assembly, and each trap in the trap assembly is correspondingly connected to one third interface;

the fourth interface side is provided with a fourth interface, the fourth interface forms a second port, the fourth interface is configured to be selectively connected with each third interface, and the fourth interface is positioned on the second connection side and connected with the first interface.

The radio frequency signal's of different frequency channels of satisfying closes way demand with the form transmission of singlet like this, when guaranteeing the singlet high performance mode of radio frequency path configuration unit and radio frequency front end module, because the introduction of second switch module for the radio frequency path configuration unit of this embodiment can also have extremely strong expansibility, can realize the transmission demand of the different combinations of the radio frequency signal of three frequencies or multifrequency.

In a second aspect, an embodiment of the present application provides a radio frequency front end module, where the radio frequency front end module includes a radio frequency channel, and the radio frequency channel has a radio frequency channel configuration unit as described above.

Therefore, through the arrangement of the radio frequency channel configuration unit in the radio frequency front-end module, the combination requirement of different radio frequency signals in a radio frequency channel is met, the insertion loss of the radio frequency signals of different frequency bands during single-state transmission in the radio frequency front-end module and the radio frequency system can be reduced, and the radio frequency performance of the radio frequency system and the electronic equipment is ensured.

In an alternative embodiment, the radio frequency channel includes a transmit chain and a receive chain, at least one of the transmit chain and the receive chain having a radio frequency path configuration unit.

Therefore, the arrangement mode of the radio frequency access configuration unit in the radio frequency front-end module can be diversified while the combination requirement and the single-state transmission requirement of different radio frequency signals in a radio frequency channel are not met.

In an optional implementation manner, an end of the trap unit in the radio frequency path configuration unit, which is away from the first interface, forms an internal interface, a second interface in the radio frequency path configuration unit forms an external interface, and the radio frequency path configuration unit is communicated with other radio frequency devices in the transmission link or the reception link through the internal interface.

Therefore, through the arrangement of the internal interface and the external interface, the connection of the radio frequency channel configuration unit, the radio frequency channel plate and the antenna system can be realized, and the wireless communication function of the electronic equipment is realized.

In a third aspect, an embodiment of the present application provides a radio frequency system, where the radio frequency system includes a radio frequency transceiving unit, an antenna system, and a radio frequency front end module as described above, where the antenna system includes multiple antennas, the antennas are configured to transmit radio frequency signals of different frequency bands, the radio frequency front end module is connected to the antennas through an external interface, the radio frequency transceiving unit is connected to a side of the radio frequency front end module, which is away from the antennas, and the radio frequency transceiving unit is configured to control communication between a first interface and a second interface in a first switch module in the radio frequency front end module.

Therefore, the combined state or the single state transmission of the radio frequency signals of different frequency bands can be met, so that the radio frequency signals of different frequency bands can share one antenna to receive and transmit the radio frequency signals of different frequency bands, and the switching among different antennas can be realized.

In an optional implementation manner, the antenna system includes a first antenna and a second antenna, where the first antenna and the second antenna are configured to be used for transmitting transmission signals of different frequency bands and receiving reception signals of different frequency bands, the transmission signals and the reception signals are radio frequency signals, and the first antenna and the second antenna are correspondingly connected to two second interfaces in the radio frequency front-end module.

Therefore, the first antenna and the second antenna are correspondingly connected with the two second interfaces in the radio frequency front-end module, so that the antenna with better performance can be switched to through the first switch module in the radio frequency path configuration unit after the performance of one of the first antenna and the second antenna is greatly reduced.

In an optional implementation manner, the antenna system may further include a third antenna and a fourth antenna, the radio frequency channel of the radio frequency front-end module includes a third switch module, the third switch module has a fifth interface side and a sixth interface side, the fifth interface side has at least two fifth interfaces, the sixth interface side has a plurality of sixth interfaces, each fifth interface is configured to be selectively connected to each sixth interface, and the third switch module is respectively connected to one of the trap unit, the third antenna, and the fourth antenna in the radio frequency front-end module through the sixth interfaces.

Through the arrangement of the third switch module and the plurality of sixth interfaces, the connection between the third switch module and the trap unit can be realized, on the basis of meeting the combination requirements of radio-frequency signals in different frequency bands in the radio-frequency front-end module, the insertion loss of the radio-frequency signals in different frequency bands during the single-state transmission in the radio-frequency front-end module and the radio-frequency system is reduced, the third switch module can be conveniently connected with the third antenna and the fourth antenna through the sixth interfaces, and the 1T4R SRS polling of the LTE main diversity can not be interrupted by the NSA scene N41 under the four antennas by the radio-frequency system and the electronic equipment.

In a fourth aspect, an embodiment of the present application provides an electronic device, where the electronic device includes a baseband chip and the radio frequency system as described in any one of the above, and the radio frequency system is connected to the baseband chip.

Therefore, radio frequency signals of different frequency bands can be transmitted in a combined state or a single state transmission mode at a transmission end of a wireless communication system in the electronic equipment according to transmission requirements, insertion loss of the radio frequency signals of different frequency bands during single state transmission can be reduced, and the electronic equipment of the embodiment can support that under four antennas, NSA scene N41 does not interrupt 1T4R SRS polling of LTE main diversity, so that the electronic equipment has better radio frequency performance.

Drawings

Fig. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present disclosure;

fig. 2 is a schematic exploded view of an electronic device according to an embodiment of the present disclosure;

fig. 3 is a schematic diagram of wireless communication of an electronic device according to an embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of a combiner provided in the related art;

fig. 5 is a schematic diagram illustrating an application of a combiner in a radio frequency front end module according to the related art;

fig. 6 is a partial schematic view of a radio frequency front end module of an electronic device provided in the related art;

fig. 7 is a first schematic structural diagram of an rf path configuration unit according to an embodiment of the present disclosure;

fig. 8 is a schematic structural diagram of a radio frequency path configuration unit according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of a first switch module according to an embodiment of the present disclosure;

fig. 10 is a schematic structural diagram of another radio frequency path configuration unit according to an embodiment of the present application;

fig. 11 is a schematic diagram of the connection between the rf path configuration unit and the antenna system in fig. 10;

fig. 12 is a schematic structural diagram of another radio frequency path configuration unit according to an embodiment of the present application;

fig. 13 is a response diagram of insertion loss and frequency of a first switch module according to an embodiment of the present disclosure;

fig. 14 is a graph illustrating the response of insertion loss and frequency when a first rf signal is transmitted in a single state in an rf path configuration unit according to an embodiment of the present disclosure;

fig. 15 is a graph illustrating the response of insertion loss and frequency when a second rf signal is transmitted in a single state in an rf path configuration unit according to an embodiment of the present application;

fig. 16 is a response diagram of insertion loss and frequency when rf signals of different frequency bands are transmitted in an rf path configuration unit in a combined state according to an embodiment of the present application;

fig. 17 is a schematic diagram of the connection between the rf path configuration unit and the antenna system in fig. 12;

fig. 18 is a schematic connection diagram of a radio frequency system provided in the related art;

fig. 19 is a first schematic diagram illustrating a connection between a radio frequency front end module and an antenna system according to an embodiment of the present application;

fig. 20 is a second schematic diagram illustrating a connection between a radio frequency front end module and an antenna system according to an embodiment of the present application;

fig. 21 is a third schematic view illustrating a connection between a radio frequency front end module and an antenna system according to an embodiment of the present application;

fig. 22 is a fourth schematic view illustrating a connection between a radio frequency front-end module and an antenna system according to an embodiment of the present application.

Description of reference numerals:

100-mobile phone; 10-a display screen; 20-middle frame; 30-a battery cover; 40-a circuit board; 50-a battery;

200-a radio frequency path configuration unit; 210-a first switch module 210; 211-a first interface side; 212-a second interface side; 220-a notch network; 221-a notch unit; 221 a-first notch unit; 221 b-a second notch unit; 221 c-third notch unit; 2211 — first connection side; 2212-second connecting side;

2213-wave trap; 2214-first connection end; 2215-a second connection end; 2216-second switch module; 2217-third interface side; 2218-fourth interface side;

300-a radio frequency channel; 310 — a transmit chain; 320 — a receive chain; 330-a filter; 340-a switch; 340 a-a first switch; 340 b-a second switch; 341-port; 350-a combiner; 360-phase-shifted routing; 370-a third switch module; 371-the fifth interface side; 372-sixth interface side;

400-a radio frequency transceiver unit; 500-an antenna system; 510-a main set antenna; 511-a first antenna; 512-a second antenna; 520-diversity antenna; 521-a third antenna; 522-a fourth antenna; 600-baseband chip.

Detailed Description

The terminology used in the description of the embodiments section of the present application is for the purpose of describing particular embodiments of the present application only and is not intended to be limiting of the present application.

(1) Bx and nx

B is the frequency band number beginning of the LTE system, n is the frequency band number beginning of the NR system, and x is the frequency band number. Bx represents a frequency band corresponding to the LTE frequency band number x; nx represents the frequency band corresponding to the NR frequency band number x.

(2)Bx_TRX、Bx_DRX、Bx_TX、Bx_RX

In the embodiment of the present application, bx _ TRX represents a transceiving link of a signal with a frequency band Bx (hereinafter, referred to as Bx signal); bx _ DRX represents the diversity receive chain for Bx signals; bx _ Tx represents the transmit chain 310 for the Bx signal; bx _ Rx represents the receive chain of Bx signals.

(3) nx _ TRX and nx _ DRX

In the embodiment of the present application, nx _ TRX represents a transceiving link of a signal with a frequency band nx (hereinafter, referred to as nx signal); nx _ DRX represents a diversity reception chain for nx signals.

(4) HB, high frequency BAND, chinese, referred to as high frequency, usually refers to frequency BANDs above 2200 Mhz.

(5) MHB, middle frequency BAND, chinese is simply referred to as the intermediate frequency, which generally refers to the 1427 Mhz-2170 MHz BAND.

(6) LB, low frequency BAND, chinese, abbreviated Low frequency, typically refers to a frequency BAND less than or equal to 980 Mhz.

(7) Antenna isolation refers to the ratio of the power of a signal transmitted by one antenna to the power of a signal received by another antenna.

Examples

The embodiment of the present application provides an electronic device, which may include, but is not limited to, an electronic apparatus having a wireless communication function, such as a mobile phone, a tablet computer (i.e., pad), a notebook computer, a wearable super, an ultra-mobile personal computer (UMPC), a netbook, a Personal Digital Assistant (PDA), and the like.

Fig. 1 and 2 illustrate an overall schematic view and a split schematic view, respectively, of an electronic device such as a mobile phone.

The structure of the electronic device according to the embodiment of the present application is further described below by taking a mobile phone as an example.

Referring to fig. 1 and 2, an electronic device such as a cellular phone 100 may include a display screen 10 and a middle frame 20, the display screen 10 being located at one side of the middle frame 20. As shown in fig. 2, an electronic device such as a mobile phone 100 may include a battery cover 30, a circuit board 40, and a battery 50, wherein the battery cover 30 is located on a side of the middle frame 20 opposite to the display screen 10, and forms a receiving space (not shown in the figure) for receiving the circuit board 40 and the battery 50 with the middle frame 20. The circuit board 40 and the battery 50 are located in the housing space. The circuit board 40 generally carries electronic devices such as a processor module, various controller modules, a memory module, a communication module, a radio frequency transceiver unit 400, a radio frequency front end module 300, and a power management module. The circuit board 40 may be understood as a main circuit board of the electronic device. The radio frequency transceiving unit 400 may include, but is not limited to, a radio frequency transceiver.

Fig. 3 illustrates a schematic diagram of wireless communication of an electronic device.

Referring to fig. 3, an embodiment of the present application further provides a radio frequency system, and an electronic device may include a baseband chip 600 and a radio frequency system, where the radio frequency system is connected to the baseband chip 600. The rf system includes an rf transceiver unit 400, an rf front-end module 300, and an antenna system 500, where the antenna system 500 includes multiple (e.g., 4) antennas configured to transmit rf signals of different frequency bands. The rf transceiver unit 400 is connected to a side of the rf front-end module 300 away from the antenna, and the rf front-end module 300 is connected to the antenna through an external interface. The rf front-end module 300 has an rf channel including a transmitting chain 310 and a receiving chain 320. The number of the transmission chain 310 and the receiving chain 320 can be one or more, and the transmission chain 310 can be used for the transmission of radio frequency signals of a plurality of different frequency bands. The receiving chain 320 may receive radio frequency signals in a plurality of different frequency bands. The transmit chain 310 and the receive chain 320 form a radio frequency channel in the radio frequency front end module 300.

The baseband chip 600 may be disposed on a main circuit board of an electronic device, such as the mobile phone 100, and is used for performing digital baseband signal processing, and encoding and decoding digital baseband signals. The rf transceiver unit 400 and the rf front-end module 300 are disposed on a main circuit board of an electronic device such as the mobile phone 100. The rf transceiver unit 400 is configured to perform conversion between a digital baseband signal and an analog rf signal, process the digital baseband signal sent by the baseband chip 600 into an rf analog signal, and then transmit the rf analog signal to the transmitting link 310 of the rf front-end module 300, or receive the rf analog signal transmitted by the receiving link 320, convert the rf analog signal into a digital baseband signal, and send the digital baseband signal to the baseband chip 600.

The multiple antennas in the antenna system 500 can be divided into a main set antenna 510 and a diversity antenna 520. The rf front-end module 300 is configured to send an rf analog signal to the main antenna 510, or receive an rf analog signal from the main antenna 510 and the diversity antenna 520, so as to perform amplification, filtering, and other processing on the rf analog signal.

The baseband chip 600 and the radio frequency system may form a wireless communication system conducting terminal of the electronic device. When the antenna system 500 receives a radio frequency signal and enters the radio frequency front end module 300, the radio frequency front end module 300 may switch the received radio frequency signal (i.e., a received signal) to the corresponding receiving link 320, and after the received signal is amplified, filtered, mixed and the like by the radio frequency device in the receiving link 320, the received signal is input to the baseband chip 600 for demodulation.

Correspondingly, when the rf transceiver unit 400 receives the rf signal (i.e., the transmission signal) output by the baseband chip 600, the transmission signal is subjected to frequency mixing, amplification, filtering, and other processing, and is output to the corresponding transmission link 310 in the rf front-end module 300 through the frequency band where the transmission signal is located, and then the transmission signal is switched to the corresponding main set antenna 510 through the rf front-end module 300 for radiation. The rf transceiver unit 400 is also used to control the switching of different transmit chains 310 and receive chains 320 in the rf front-end module 300.

Therefore, the electronic equipment can carry out wireless communication with the network equipment or other electronic equipment and the like through the wireless communication system conducting terminal through a wireless network so as to complete information transceiving with the network equipment or other electronic equipment. The network device may include a server or a base station, etc.

Illustratively, the transmitting chain 310 may include, but is not limited to, being formed by sequential connection of power amplifiers, filters, switches, and the like, and the receiving chain 320 may include, but is not limited to, being formed by sequential connection of low noise amplifiers, filters, switches, and the like. Alternatively, in some embodiments, the transmission chain 310 and the receiving chain 320 may take other different forms. In this embodiment, the components in the transmitting chain 310 and the receiving chain 320 are not further limited, and reference may be made to the description in the related art.

It should be noted that the electronic device such as the mobile phone 100 may further include a microphone, a speaker, a camera, and the like, and therefore, the structure illustrated in fig. 2 does not limit the structure of the electronic device.

Long Term Evolution (LTE) is a technical standard of The universal mobile communication system established by The third Generation Partnership project (3 gpp) organization, and The LTE system network architecture reduces network nodes and system complexity of The mobile communication system, thereby reducing system delay, network deployment and maintenance costs of The mobile communication system.

With the continuous development of mobile communication technology, fifth Generation mobile communication (5G) systems have gradually become widely used in the market due to their higher transmission rate. Networking modes of the current 5G system include two modes of NSA (Non-standard, non-independent) and independent (SA). The mobile communication system is generally composed of a base station, a core network and a bearer network, and so-called "networking" of NSA and SA refers to a collocation manner of the base station and the core network. However, the existing 5G system cannot completely replace the LTE system, and therefore, the existing facilities of the LTE system are needed to provide services for users in the existing 5G system, so as to meet the service requirements of the users.

The NSA mode introduces a Dual connection link (endec), performs NSA networking by using Long Term Evolution (LTE) and 5G (new radio, NR), so that an electronic device supporting a terminal can be connected to a fourth generation mobile communication technology (4 wireless systems, 4G) base station and a 5G base station at the same time, and service requirements of users are met.

In the networking mode of the current 5G system, the NSA mode occupies a certain proportion. The roles assumed by the two base stations, the 4G base station and the 5G base station, are different in the NSA mode, when the electronic device supporting simultaneous operation of NR and LTE systems is in the NSA mode, the radio frequency front end module 300 of the electronic device often needs to perform simultaneous transceiving of a service in the NR frequency band and a service in the LTE frequency band.

To meet the use of networks with different technical standards, electronic devices with multiple frequencies and multiple modes (such as electronic devices supporting simultaneous operation of NR and LTE dual systems) have been increasingly widely used. With the requirement of the 5G standard for a multi-band multiple input multiple output (mimo) specification of an electronic device, such as a 4x4mimo specification and an endec link, the electronic device generates a frequency requirement of multi-band and multi-mode.

Under the design of electronic devices such as the mobile phone 100 with more and more delicate shapes, the number of antennas in the antenna system 500 on the mobile phone 100 becomes more and more extreme, and the number of antennas on the mobile phone 100 is severely limited under the condition of satisfying the antenna isolation. Under the NSA mode, the electronic equipment supporting the simultaneous work of the NR and LTE systems has a scene that the service of the NR frequency band and the service of the LTE frequency band work simultaneously. In addition, in a Carrier Aggregation (CA) scenario, a scenario in which a service in an LTE band and a service in the LTE band operate simultaneously, and a scenario in which a service in an NR band and a service in an NR band operate simultaneously may also occur.

Fig. 4 is a schematic structural diagram of a combiner provided in the related art.

Referring to fig. 4, the combiner 350 has two signal input terminals and one signal output terminal, and after the radio frequency signal in the Band a frequency Band and the radio frequency signal in the Band B frequency Band enter the combiner 350 through one signal input terminal, they may be combined in the combiner 350 and output through one signal output terminal.

In this embodiment, the Band a frequency Band and the Band B frequency Band are not further limited as long as frequencies in the Band a frequency Band and the Band B frequency Band are not overlapped.

Fig. 5 is a schematic diagram illustrating an application of a combiner in a radio frequency front end module according to the related art.

In a scenario where the number of antennas on an electronic device, such as the mobile phone 100, is severely limited, referring to fig. 5, a large number of combiners 350 are disposed in a radio frequency channel of the radio frequency front-end module 300 at a conductive end of a wireless communication system of an electronic device in the first related art, so as to meet requirements of combining multiple different frequency bands in the radio frequency front-end module 300 (that is, radio frequency signals in different frequency bands are transmitted in a combined manner). As shown in fig. 5, after passing through the filter 330, the radio frequency signal in the B41 band is combined with the radio frequency signal in the MB band by one combiner 350 in the radio frequency channel and passes through the switch 340, and then is combined with the radio frequency signal in the n78 band by another combiner 350 in the radio frequency channel again, so that the radio frequency signal in the B41 band, the radio frequency signal in the MB band, and the radio frequency signal in the n78 band may share one antenna ANT1.

It should be noted that an nx frequency band in this embodiment, such as an n78 frequency band, an n41 frequency band, and the like, may be regarded as a frequency band of a 5G standard, and a Bx frequency band, such as a B41 frequency band, a B34 frequency band, a B39 frequency band, a B3 frequency band, a B2 frequency band, and the like, may be understood as a frequency band of a 4G standard or a 3G standard.

In the first related art, a large number of combiners 350 are disposed in the radio frequency channel, so that radio frequency signals of multiple different frequency bands, such as radio frequency signals of an NR frequency band and radio frequency signals of an LTE frequency band, radio frequency signals of an LTE frequency band and radio frequency signals of an LTE frequency band, or radio frequency signals of an NR frequency band and radio frequency signals of an NR frequency band, can share one antenna ANT1 to perform transceiving of radio frequency signals of different or the same services in an NSA mode, thereby solving transceiving of radio frequency signals in a scenario where the number of antennas on the mobile phone 100 is severely limited.

However, since the combiner 350 is a passive device, the addition of the combiner 350 may add additional insertion loss to the whole rf channel, even when two rf signals of different frequency bands are not required to be combined by the combiner 350 (i.e. a single rf signal passes through the combiner 350 in a form of single-state transmission), the insertion loss of the combiner 350 to the whole rf channel cannot be reduced, and the rf signals of different frequencies occupy a certain proportion when wireless communication is performed on the electronic device through the combiner 350 in a form of single-state transmission. The addition of the combiner 350 affects the insertion loss of the rf front-end module 300.

In view of the increasingly complex frequency requirements, system designs and increasingly sophisticated appearance requirements of present electronic devices, the existing electronic devices inevitably use multiple combiners 350 or even use multiple stages of combiners 350 on the same channel on a radio frequency channel, which leads to the radio frequency insertion loss of the whole radio frequency system to be deteriorated, and the radio frequency performance of the radio frequency system and the electronic devices to be reduced. In addition, in the existing rf channel shown in fig. 5, when the rf signals of different frequency bands are transmitted in the rf channel in a combined manner, the frequency band combination manner of the rf signals of different frequency bands is less, and the flexibility is poor.

Fig. 6 is a schematic diagram illustrating a part of an rf front-end module of an electronic device provided in the related art.

To this end, referring to fig. 6, in the second related art, a partial schematic diagram of an rf front end module 300 of an electronic device, such as a mobile phone 100, is provided. As shown in fig. 6, in the rf front-end module 300, the filter 330 in the receiving chain (i.e., B34 Rx) of the rf signal in the B34 band, the receiving chain (i.e., B39 Rx) of the rf signal in the B39 band, and the receiving chain (i.e., B41 Rx) of the rf signal in the B41 band are respectively connected to corresponding different ports 341 in the switch 340. The switch 340 is a multiple selection switch. In order to realize the combination requirement of any two of the radio frequency signal of the B34 frequency band, the radio frequency signal of the B39 frequency band and the radio frequency signal of the B41 frequency band, in the related art, a phase shift trace 360 is connected between the three filters 330 and the ports 341 of the switches 340 correspondingly connected thereto, the phase of the radio frequency signal is changed by the phase shift trace 360, and the phase shift trace is combined with the switches 340, so that the combination requirement of at least two of the radio frequency signal of the B34 frequency band, the radio frequency signal of the B39 frequency band and the radio frequency signal of the B41 frequency band is met.

However, the phase shift routing 360 and the switch 340 are used to cooperate to meet the combining requirement, and although the insertion loss of the rf front-end module 300 and the rf system can be reduced when the rf signals with different frequencies are transmitted in the rf front-end module 300 in a single-state transmission manner, the phase shift routing 360 can only achieve the combining of individual frequency bands, and it is difficult to achieve the phase shift cooperation of combining the rf signals of multiple frequency bands, and it is difficult to achieve the free combination of the rf signals of multiple frequency bands in a broadband range. In addition, due to the addition of the phase-shift trace 360, the implementation of the second related art needs to rely on a more complex semiconductor process, and the current semiconductor industry has a limited capability of implementing the semiconductor process of the second related art.

In view of this, the embodiment of the present application provides a radio frequency path configuration unit, which is applied to a radio frequency channel of a radio frequency front-end module 300 to replace a combiner 350 and a switch 340 connected to the combiner 350 in the radio frequency channel, and through the arrangement of a notch network and a first switch module in the radio frequency path configuration unit, while meeting a combining requirement or a single-state transmission requirement of radio frequency signals of different frequency bands, the insertion loss of the radio frequency path configuration unit in the radio frequency front-end module and a radio frequency system, especially the insertion loss of the radio frequency front-end module and the radio frequency system during single-state transmission of the radio frequency signals of different frequency bands, can be reduced, and the radio frequency performance of the radio frequency system and electronic equipment is ensured.

The structure of the rf path configuration unit according to the embodiment of the present application will be further described with reference to the accompanying drawings.

Fig. 7 illustrates a first structural diagram of an rf path configuration unit, and fig. 8 illustrates a second structural diagram of an rf path configuration unit.

Referring to fig. 7 and 8, the rf path configuration unit 200 includes a first switch module 210 and a trap network 220, wherein the first switch module 210 is a multi-way switch. As shown in fig. 7 and 8, the first switch module 210 has a first interface side 211 and a second interface side 212, the first interface side 211 having at least two first interfaces such as a first interface a and a first interface B, etc., and the second interface side 212 having at least one second interface such as a second interface 1, etc.

Referring to FIGS. 7 and 8, the notching network 220 may include at least two notching elements 221, that is, the notching network 220 may include two or more notching elements 221. The number of first interfaces may be equal to the number of notching units 221 in order to satisfy the connection of the notching units 221 to the first interfaces in the notching network 220. The different notch units 221 in the notch network 220 are used for transmitting radio frequency signals of different frequency bands, and the notch units 221 have pass bands adapted to the transmitted radio frequency signals, so that the radio frequency signals of the transmitted frequency bands can be prevented from passing through while the radio frequency signals of the frequency bands outside the pass bands pass through, which is beneficial to reducing the insertion loss of the radio frequency signals of the transmitted frequency bands.

Each notch unit 221 is correspondingly connected with one first interface, each first interface is configured to be selectively connected with each second interface to form multiple radio frequency paths for radio frequency signal transmission, and the radio frequency paths include at least one of a combining path and a single path. That is, the first switch module 210 of the present embodiment has a multi-on (Muti-on) function. Thus, when radio frequency signals of different frequency bands are transmitted to the notch unit 221 in the notch network 220, a combining path may be formed in the radio frequency path configuration unit 200 by controlling the first interface connected to the notch unit 221 to be selectively communicated with the same second interface in the first switch module 210 according to transmission requirements (i.e., single-state transmission, combined-state transmission, or no transmission) of the radio frequency signals of different frequency bands, so that the radio frequency signals of different frequency bands are transmitted in a combined-state manner in the combining path after passing through the respective corresponding notch unit 221, thereby meeting the combining requirements of the radio frequency signals of at least two different frequency bands in the radio frequency front-end module 300, and enabling at least two different frequency bands to share one antenna.

Or, in the embodiment of the present application, the first interface connected to the notch unit 221 may be selectively communicated with a different second interface in the first switch module 210 by controlling the first interface to form a single-pass path in the radio frequency path configuration unit 200, so as to implement that radio frequency signals of different frequency bands are transmitted in a single-pass path in a single-state form after passing through the corresponding notch unit 221.

Thus, when the radio frequency path configuration unit 200 is applied to the radio frequency front-end module 300 to replace a combiner and a switch connected to the combiner in the transmitting link 310 or the receiving link 320 in the radio frequency front-end module 300, the combining requirements and the one-way requirements of radio frequency signals of different frequency bands in the radio frequency path configuration unit 200 and the radio frequency front-end module 300 are met, the insertion loss of the radio frequency path configuration unit 200 in the radio frequency front-end module 300 can be effectively reduced, especially, when the radio frequency signals of different frequency bands are transmitted in a single-way in the one-way, the insertion loss of the radio frequency path configuration unit 200 in the radio frequency front-end module 300 can be effectively reduced, the single-way high-performance transmission of the radio frequency signals in the radio frequency path configuration unit 200 can be realized, the radio frequency performance of the radio frequency front-end module 300 and a radio frequency system can be improved, and the wireless communication function of the electronic device can be ensured.

In addition, since the first switch module 210 has at least two first interfaces and at least one second interface, each first interface is configured to be selectively connectable to each second interface, and the notch unit 221 has a passband adapted to the transmitted radio frequency signal, the radio frequency path configuration unit 200 of the present embodiment can also implement a multi-combination multi-band combining function in a wide frequency range.

It should be noted that the frequency path configuration unit of this embodiment may be applied to combined transmission or single transmission of radio frequency signals of different frequency bands. The radio frequency signals of different frequency bands may include, but are not limited to, radio frequency signals of an LTE frequency band and radio frequency signals of an LTE frequency band, radio frequency signals of an NR frequency band and radio frequency signals of an LTE frequency band, or radio frequency signals of an NR frequency band and radio frequency signals of an NR frequency band.

Meanwhile, in this embodiment, only by controlling the connection between the first interface and the second interface, different channels can be formed in the first switch module 210 in a combined manner, so as to implement and satisfy multiple combined transmission modes of radio frequency signals of different frequency bands, and the diversity and flexibility of combinations of the radio frequency signals in the radio frequency path configuration unit 200 and the radio frequency front end module 300 are enhanced, so that the radio frequency path configuration unit 200 can be manufactured without adopting a semiconductor process of the top level in the semiconductor industry while the different channels in the first switch module 210 are rapidly switched, so as to reduce the manufacturing process difficulty and manufacturing cost of the radio frequency path configuration unit 200 and the radio frequency front end module 300.

As shown in fig. 7, the combining path has a common transmission end and at least two branch transmission ends, the branch transmission ends are both connected to the common transmission end, and the radio frequency signals of different frequency bands are transmitted to the common transmission end (i.e., multi-input single-output) through the different branch transmission ends to form a combined signal. The combined path may be applied to the transmission link 310 to replace the combiner 350 and the switch 340 connected to the combiner 350 in the transmission link 310, and the combined signal may be used as a transmission signal, so that the radio frequency path configuration unit 200 may be connected to the main set antenna 510 to transmit the transmission signal to the main set antenna 510.

Alternatively, in some embodiments, the combined signal may also be transmitted to different branch transmission terminals through a common transmission terminal to form multiple rf signals. The combined path may also be applied to receive chain 320, and the combined signal may be the received signal. The rf path configuration unit 200 may be connected to the main set antenna 510 to receive the received signal from the main set antenna 510. Alternatively, the rf path configuration unit 200 may be connected to the diversity antenna 520 to receive the received signal from the diversity antenna 520.

It should be noted that, in this embodiment, a connection position of the radio frequency path configuration unit 200 in the radio frequency path is not limited, that is, the radio frequency path configuration unit 200 of this embodiment may be applied to the transmission link 310 and may also be applied to the reception link 320.

The structure of the rf path configuration unit 200 of the present embodiment will be further described below by taking the rf path configuration unit 200 as an example, which is applied to the transmission link 310 of the rf front-end module 300.

Referring to fig. 7, when at least two notch units 221 are connected to the same second interface through corresponding first interfaces, the second interface and the notch units 221 form a combining path through the first interfaces, so as to meet the need of combining radio frequency signals of different frequency bands.

Fig. 7 illustrates two first interfaces, namely a first interface a and a first interface B, and a second interface, namely a second interface 1. The first interface a and the first interface B can be selectively connected with the second interface 1 according to the transmission requirement of the transmitted radio frequency signal to form different channels. Fig. 7 shows that the first interface a and the first interface B are connected to the second interface 1 at the same time to form a combining path. The combining channel includes a channel a-1 and a channel B-1 in the first switch module 210, and the channel a-1 and the channel B-1 share a second interface 1. The channel a-1 and the channel B-1 constitute two branch transmission terminals and the second interface 1 constitutes a common transmission terminal. The radio frequency signal of the B3 frequency band and the radio frequency signal of the B40 frequency band are transmitted to the second interface 1 through the channel a-1 and the channel B-1 respectively after passing through the corresponding notch unit 221, so that a combined signal is formed through the second interface 1 for subsequent transmission.

It should be noted that the channel a-1 in the first switch module 210 may be understood as a connection between the first interface a and the second interface 1. In the embodiment of the present application, reference may be made to the description of the channel a-1 in the first switch module 210 for the description of the channel in the switch module, and in this embodiment, no further description is made on other channels in the switch module.

Referring to fig. 8, when at least two notch units 221 are respectively connected to different second interfaces through corresponding first interfaces, the notch units 221, the first interfaces, and the second interfaces are sequentially connected to form a single path. Therefore, the switching between the single-path and the combined path can be realized by controlling the connection between the first interface and the second interface in the first switch module 210, so as to meet the transmission requirements of radio frequency signals of different frequency bands, and the insertion loss of the radio frequency signals of different frequency bands during the single-state transmission can be reduced.

Fig. 8 illustrates two first interfaces, namely a first interface a and a first interface B, and two second interfaces, namely a first interface 1 and a first interface 2. The first interface a and the first interface B are selectively connected with at least one of the second interface 1 and the first interface 2 according to the transmission requirement of the transmitted radio frequency signal to form different channels. The connection of the first switch module 210 between the first interface and the second interface illustrated by the solid line in fig. 8 is only one connection manner between the first interface and the second interface in the first switch module 210. In fig. 8 it is shown that the first interface a is connected to the second interface 1 forming a single-pass channel a-1 and the first interface B is connected to the second interface 2 forming a single-pass channel B-2. The single-pass channel a-1 and the single-pass channel B-2 form two independent single-pass channels in the first switch module 210, so that the radio frequency signal in the B3 frequency band can be transmitted in a single-state form through the single-pass channel a-1, and the radio frequency signal in the B40 frequency band can be transmitted in a single-state form through the single-pass channel B-2.

Wherein the notching unit 221 is configured to notch the transmitted radio frequency signal to block the radio frequency signal corresponding to the stop band of the notching unit from passing through, and a suppression ratio of the notching unit 221 to the radio frequency signal corresponding to the self-notching frequency point is less than or equal to 10db. The notch frequency point may also be a zero point or a rejection frequency point, and the stop band of the notch unit 221 includes the notch frequency point, which is one frequency point in the stop band. Wherein the stop band and the pass band are opposite concepts, i.e. the stop band of the same notch 221 is located outside the passband of the notch 221 itself. The notch processing can be understood as that after the radio frequency signal of a certain frequency band is transmitted to the notch unit 221, while ensuring that the radio frequency signal of the certain frequency band has a higher pass rate and a lower insertion loss, the notch unit 221 can prevent the radio frequency signal corresponding to the stop band of the notch unit 221 from passing through, and has a higher rejection rate, especially the radio frequency signal corresponding to the notch frequency point, for the notch frequency point of the notch unit 221 to be far away from the pass band of the notch unit 221, so as to greatly improve the one-way performance of the radio frequency path configuration unit 200 and the radio frequency front end module 300 when the radio frequency signals of different frequency bands are transmitted in the one-way path in the one-way manner, effectively reduce the insertion loss of the radio frequency path configuration unit 200 in the radio frequency front end module 300 when the radio frequency signals of different frequency bands are transmitted in the one-way path in the one-way manner, and realize the one-way high-performance transmission of the radio frequency signals in the radio frequency path configuration unit 200.

Meanwhile, the embodiment of the present application can also ensure that the performance of the rf path configuration unit 200 and the rf front-end module 300 is substantially equal (i.e., no greater deterioration or improvement) when the rf signals of different frequency bands are transmitted in the combined path in a combined state, compared with the performance of the rf front-end module 300 in the prior art.

It should be noted that, as shown in fig. 5, in the first related art, the radio frequency front-end module 300 is further provided with a switch 340 after the combiner 350, so that the switch 340 is used to switch the radio frequency channels. In contrast, the radio frequency path configuration unit 200 of this embodiment not only can meet the requirements of combining and single-pass transmission of radio frequency signals of different frequency bands in the radio frequency front-end module 300, and ensure that the radio frequency signals can be transmitted in a single-state high performance in the radio frequency path configuration unit 200, but also can have the performance of the combiner 350 and the switch 340 in the first related art, so that when the radio frequency path configuration unit 200 is integrated into one electronic device, the radio frequency path configuration unit 200 of this embodiment can reduce the number of radio frequency devices in the radio frequency front-end module 300, and is helpful to reduce the occupied space of the radio frequency front-end module 300 on the circuit board 40 of the electronic device.

It is noted that in some embodiments, the number of first interfaces may also be greater than the number of notch units 221. In this embodiment, the relationship between the number of first interfaces and the notch units 221 is not further limited.

Fig. 9 illustrates a schematic structural diagram of a first switch module, and fig. 10 illustrates a schematic structural diagram of another rf path configuration unit.

Referring to fig. 9 and 10, in some embodiments, the second interface side 212 may also have at least two second interfaces. Illustratively, the second interface side 212 may have three, four, or more second interfaces. The number of second interfaces may be equal to the number of notching units 221 (as shown in FIG. 10). Alternatively, in some embodiments, the number of second interfaces may also be greater than the number of notch units 221. This makes it possible to further diversify the configuration of the rf path configuration unit 200 while ensuring that the rf signal transmitted by each notch unit 221 can be transmitted in a single state.

In some embodiments, the first switch module 210 has a plurality of first interfaces, and the number of the first interfaces may be greater than or equal to the number of the second interfaces. The number of first interfaces may be equal to the number of second interfaces. The first switch module 210 may include, but is not limited to, a 3P3T slide switch as shown in fig. 9, or a 2P2T slide switch as shown in fig. 8. In other embodiments, the number of first interfaces may be greater than the number of second interfaces. In this embodiment, the type of the first switch module 210 is not further limited. Thus, the structure of the first switch module 210 can be more diversified, so as to realize multiple combined transmission of radio frequency signals of different frequency bands.

The structure of the rf path configuration unit 200 of the present embodiment will be further described below by taking a 3P3T slide switch as an example.

Referring to FIG. 10, the notch network 220 may include at least two of a first notch unit 221a, a second notch unit 221b, and a third notch unit 221 c. FIG. 10 shows a notch network 220 comprising a first notch unit 221a, a second notch unit 221b, and a third notch unit 221 c. In some embodiments, the notching network 220 can also be made up of more notching units 221. The radio frequency signals may include at least two of first, second, and third radio frequency signals of different frequency bands. The first notch unit 221a has a first pass band and a first stop band, the first pass band corresponds to a frequency band of the first radio frequency signal, and the first stop band corresponds to a frequency band of the second radio frequency signal and a frequency band of the third radio frequency signal, so that the first notch unit 221a notches the second radio frequency signal and the third radio frequency signal, thereby preventing the second radio frequency signal and the third radio frequency signal from passing through, ensuring that the first radio frequency signal passes through, and having a small insertion loss.

The second notch unit 221b has a second pass band and a second stop band, the second pass band corresponds to a frequency band of the second rf signal, and the second stop band corresponds to a frequency band of the first rf signal and a frequency band of the third rf signal, so that the first rf signal and the third rf signal are notched by the second notch unit 221b, and the second rf signal can be ensured to pass through while the first rf signal and the third rf signal are suppressed from passing through, and the insertion loss is small.

The third notch unit 221c has a third pass band and a third stop band, the third pass band corresponds to a frequency band for the third rf signal, and the third stop band corresponds to a frequency band for the first rf signal and the second rf signal, so that the third notch unit 221c can notch the first rf signal and the second rf signal, thereby suppressing the first rf signal and the second rf signal from passing through, ensuring that the third rf signal passes through, and having a small insertion loss.

In this way, the first stop band is set so that the first notch unit 221a has a high rejection rate for the second radio frequency signal and the third radio frequency signal, and the first pass band is set so that the first notch unit 221a has a small insertion loss for the first radio frequency signal. Correspondingly, the second notch unit 221b can have a higher rejection rate for the first radio frequency signal and the third radio frequency signal through the setting of the second stop band, and the second notch unit 221b can have a smaller insertion loss for the second radio frequency signal through the setting of the second pass band; through the setting of the third stop band, the third notch unit 221c can have a higher rejection rate for the first radio frequency signal and the second radio frequency signal, and through the setting of the third pass band, the third notch unit 221c can have a smaller insertion loss for the third radio frequency signal, so as to improve the single-state high-performance transmission performance of the radio frequency path configuration unit 200 and the radio frequency front-end module 300.

In some embodiments, the first rf signal may be in a high frequency band, the second rf signal may be in an intermediate frequency band, and the third rf signal may be in a low frequency band. At this time, the first notch unit 221a may constitute a high pass network in the notch network 220, the second notch unit 221b may constitute a medium pass network in the notch network 220, and the third notch unit 221c may constitute a low pass network in the notch network 220.

Alternatively, in some embodiments, the first rf signal may be in a low frequency band, the second rf signal may be in an intermediate frequency band, and the third rf signal may be in a high frequency band, in which case, the first notch unit 221a may constitute a low-pass network in the notch network 220, the second notch unit 221b may constitute a medium-pass network in the notch network 220, and the third notch unit 221c may constitute a high-pass network in the notch network 220.

For example, the first radio frequency signal, the second radio frequency signal, and the third radio frequency signal may include, but are not limited to, a 5G system frequency band such as an n41 frequency band, an n78 frequency band, a 4G system frequency band such as a B39 frequency band, a B40 frequency band, and a B41 frequency band, a 3G system frequency band such as a B3 frequency band, and a B34 frequency band. It should be noted that, according to different operators, the frequency band of the NR system and the frequency band of the LTE system may be divided into different frequency bands of other systems, for example, a B3 frequency band, an n3 frequency band, or an n41 frequency band may also be divided into a frequency band of a 4G system according to different operators. Specifically, in this embodiment, specific frequency ranges of the NR system frequency band and the LTE system frequency band are not further limited, and reference may be specifically made to related descriptions in the prior art.

Alternatively, the notching network 220 can have more combinations of possibilities. In this embodiment, the combination of different frequency band networks in the notch network 220 is not further limited.

It should be noted that, in fig. 9, solid lines between the first interface and the second interface in the first switch module 210 indicate that the first notch unit 221a, the second notch unit 221B, and the third notch unit 221C are simultaneously connected to the second interface 1 through the first interface a, the first interface B, and the first interface C, respectively, to form a combining path in which three branch transmission ends share one common transmission end, so that the radio frequency signal in the B3 frequency band passes through the first notch unit 221a, the radio frequency signal in the B40 frequency band passes through the second notch unit 221b, and the radio frequency signal in the B2 frequency band passes through the combining requirement of the third notch unit 221C, and is output through the second interface 1.

Fig. 11 is a schematic diagram illustrating the connection between the rf path configuration unit and the antenna system in fig. 10.

Fig. 11 shows that the radio frequency signal in the B3 frequency band, the radio frequency signal in the B40 frequency band, and the radio frequency signal in the B2 frequency band are transmitted to corresponding antennas in the antenna system 500 in a simplex transmission manner in the radio frequency path configuration unit 200. In this case, the rf path configuration unit 200 can be understood as a multiplexer.

It should be noted that fig. 10 and fig. 11 illustrate two different transmission requirements, respectively. Specifically, the present embodiment may further satisfy the transmission requirements of different radio frequency signals by controlling the connection of different combinations of the first interface and the second interface.

Fig. 12 is a schematic structural diagram of another radio frequency path configuration unit.

Referring to fig. 12, the notch unit 221 has a first connection side 2211 and a second connection side 2212, the first connection side 2211 has at least one first port, such as a first port 1, etc., the second connection side 2212 has a second port, such as a second port K, etc., the notch unit 221 is connected to the first interface through the second port, and when the first connection side 2211 has at least two first ports, the second port is configured to be selectively connected to each first port, so that the rf path configuration unit 200 can form a combiner 350 or a multiplexer in different combinations while supporting the single-state high-performance transmission of the rf signals in different frequency bands, so as to meet more transmission combination requirements of the rf signals in different frequency bands.

Referring to fig. 12, the trap unit 221 includes a trap assembly including at least one trap 2213. Figure 11 illustrates a trap assembly having one trap 2213 and figure 12 illustrates a trap assembly having four traps 2213. The number of the traps 2213 in the trap assembly may also be other, such as two, three, etc. In this embodiment, the number of traps 2213 in the trap assembly is not further limited.

The trap 2213 has a first connection end 2214 at the first connection side 2211, the first connection end 2214 constituting a first port for connection with a radio frequency channel. The wave trap 2213 has a second connection end 2215 on the second connection side 2212, the wave trap 2213 is connected to the first interface via the second connection end 2215, and the wave trap 2213 has a passband adapted to the transmitted radio frequency signal. Thus, when a radio frequency signal in a certain frequency band, for example, a radio frequency signal in a B3 frequency band, is transmitted to the trap 2213, the trap 2213 may perform a trap processing on the radio frequency signal in the B3 frequency band, so as to ensure that the radio frequency signal in the B3 frequency band has a smaller insertion loss when passing through.

As shown in fig. 11, when the trap unit 221 includes only the trap assembly and the trap assembly is composed of one trap 2213, the trap 2213 may be directly connected to the first interface through the second connection terminal 2215.

Alternatively, in some embodiments, referring to fig. 12, the trap assembly may further include at least two traps 2213, such as four traps 2213, the trap unit 221 may further include a second opening Guan Mozu 2216, the second switch module 2216 has a third interface side 2217 and a fourth interface side 2218, the third interface side 2217 has a third interface, the number of the third interfaces is greater than or equal to the number of the traps 2213 in the trap assembly, and each trap 2213 in the trap assembly is correspondingly connected to one third interface. The third interface may include, but is not limited to, a third interface 1, a third interface 2, a third interface 3, and a third interface 4.

The fourth interface side 2218 has a fourth interface K. For example, the second switch module 2216 can include, but is not limited to, a single-pole multi-throw switch such as a single-pole four-throw switch. The fourth interface K constitutes a second port, and is configured to be selectively connected to each third interface, and the fourth interface K is located on the second connection side 2212 and is connected to the first interface. This ensures that each trap 2213 in the trap assembly can be connected to the third interface, so that different paths can be formed in the second switch module 2216 by controlling the connection of the third interface 1, the third interface 2, the third interface 3, the third interface 4 and the fourth interface K in the second switch module 2216, and one trap 2213 in the trap unit 221 can be controlled to communicate with the first interface of the first switch module 210 through one of the paths, such as the path 3-K (i.e. the third interface 3 is connected to the fourth interface K), of the second switch module 2216, so that the radio frequency signal passing through the trap 2213 can be transmitted in a combined state with the radio frequency signals in other trap units 221 in the first switch module 210, so that the combination requirement of the radio frequency signals in different frequency bands can be transmitted in a single state, and a single-state high performance mode of the radio frequency path configuration unit 200 and the radio frequency front end module 300 is realized.

In addition, due to the introduction of the second switch module 2216, the rf path configuration unit 200 of the present embodiment may have a very strong expansibility, so as to meet the transmission requirements of different combinations of three-frequency or multi-frequency rf signals.

Fig. 13 is a graph illustrating the response of the insertion loss to the frequency of the first switch module. Fig. 14 illustrates a response diagram of insertion loss and frequency when a first radio frequency signal is transmitted in a single state in the radio frequency path configuration unit, fig. 15 illustrates a response diagram of insertion loss and frequency when a second radio frequency signal is transmitted in a single state in the radio frequency path configuration unit, and fig. 16 illustrates a response diagram of insertion loss and frequency when radio frequency signals of different frequency bands are transmitted in a combined state in the radio frequency path configuration unit.

In order to verify the performance of the rf path configuration unit 200 in the present embodiment, the present application performs experimental verification on the performance of the rf path configuration unit 200. Wherein, a frequency point is respectively selected from the first radio frequency signal and the second radio frequency signal, the frequency point m1 selected by the first radio frequency signal is 1.88Ghz, and the frequency point m2 selected by the second radio frequency signal is 2.3Ghz.

Taking the frequency point m1 as 1.88Ghz and the frequency point m2 as 2.3Ghz as an example, the performance of the first switch module 210, the single-state transmission performance of the radio frequency path configuration unit 200, and the performance of the combined-state transmission are tested. The verification results are shown in fig. 13 to 16.

As can be seen from fig. 13, at frequency point m1, the insertion loss due to the structure of the first switch module 210 itself is 0.515db, and at frequency point m2, the insertion loss due to the structure of the first switch module 210 itself is 0.618db. As can be seen from fig. 14, when the first rf signal passes through the one-way path in the single-state transmission mode, the insertion loss of the frequency point m1 is 0.685db (including the insertion loss caused by the structure of the first switch module 210 itself), which is only 0.17db greater than the insertion loss of a single first switch module 210, and at this time, the first notch frequency point m01 of the first notch unit 221a for transmitting the first rf signal is far away from the first rf signal (i.e., the first passband) where the frequency point m1 is located. The region in which the first pass band is located may refer to a frequency band in which a circle drawn by a dotted line in fig. 14 is located.

As can be seen from fig. 15, when the second rf signal passes through the single-pass channel in a singlet transmission manner, the insertion loss of the frequency point m2 is 1.199db (including the insertion loss caused by the structure of the first switch module 210 itself), which is only 0.58db greater than the insertion loss of a single first switch module 210, and at this time, the second notch frequency point m02 of the second notch unit 221b for transmitting the second rf signal is far away from the second rf signal (i.e., the second passband) where the frequency point m2 is located. The region in which the second passband is located may refer to the frequency band in which the circle drawn by the dotted line in fig. 15 is located.

Accordingly, as can be seen from fig. 16, when the first rf signal and the second rf signal pass through the combining path in a combined state, the insertion loss at the frequency point m1 is 1.89db (including the insertion loss caused by the structure of the first switch module 210 itself), which is 1.3db greater than the insertion loss of a single first switch module 210, and the insertion loss at the frequency point m2 is 1.84db (including the insertion loss caused by the structure of the first switch module 210 itself), which is 1.2db greater than the insertion loss of a single first switch module 210.

Since the design of the combiner 350 in the first related art needs to consider the insertion loss of the first radio frequency signal and the second radio frequency signal when they are combined, the insertion loss of the combiner 350 to the first radio frequency signal and the second radio frequency signal cannot be minimized. Therefore, when the first rf signal and the second rf signal respectively pass through the combiner 350 in a single-state transmission manner, the insertion loss of the frequency point m1 is 1db, and the insertion loss of the frequency point m2 is 2.7db. Therefore, the radio frequency path configuration unit 200 of the present embodiment can effectively reduce the insertion loss when the radio frequency signals of different frequency bands pass through the radio frequency front end module 300 in a single-state transmission manner, so as to ensure the radio frequency performance of the radio frequency front end module 300.

It should be noted that, in the insertion loss test of the frequency point m1 and the frequency point m2, the insertion loss of the frequency point m1 and the frequency point m2 may also be affected by other external factors, and therefore, the insertion loss of the frequency point m1 and the frequency point m2 is only an example, and the insertion loss of the frequency point m1 and the frequency point m2 may float to some extent in the above related values.

In this embodiment, when the first radio frequency signal and the second radio frequency signal are not required to be transmitted in a combined state, the connection between the first interface and the second interface of the first switch module 210 may be controlled, so that the first radio frequency signal and the second radio frequency signal may be transmitted in a single state transmission manner, and the notch network 220 performs notch processing, so that notch frequency points corresponding to different notch units 221 are far away from the pass band thereof, so as to reduce insertion loss during the single state transmission of the radio frequency signals.

Therefore, according to the embodiment of the present application, while the requirement of combining radio frequency signals of different frequency bands is met, when radio frequency signals of different frequency bands are transmitted in a single-pass path in a single-state manner, the insertion loss of the radio frequency path configuration unit 200 in the radio frequency front end module 300 can be effectively reduced, and single-state high performance transmission of radio frequency signals in the radio frequency path configuration unit 200 can be achieved.

When the first switch module 210 and the novel combiner 350 formed by the notch network 220 in this embodiment are used, the isolation of the novel combiner 350 to the radio frequency signals in different frequency bands is greater than or equal to 10db, for example, the isolation of the novel combiner 350 to the radio frequency signals in different frequency bands is 15db, so that the risk that another channel is over-powered when one channel in the first switch module 210 transmits the maximum power does not exist after the first switch module 210 is opened.

It should be noted that, in some embodiments, other frequency points of the first radio frequency signal and the second radio frequency signal may also be tested, and in this embodiment, no further description is given.

Fig. 17 is a schematic diagram of the connection between the rf path configuration unit and the antenna system in fig. 12.

On the basis of the above embodiments, referring to fig. 17, an embodiment of the present application further provides an rf front-end module 300, where the rf front-end module 300 may have an rf channel, and the rf channel has the rf path configuration unit 200 of the present embodiment therein. The rf path configuration unit 200 may be used to replace the combiner 350 in the rf channel and the switch 340 connected to the combiner 350, so as to meet the combining requirement of different rf signals in the rf channel, and compared with the related art, the insertion loss of the rf signals of different frequency bands during the single-state transmission in the rf front-end module 300 and the rf system can be reduced, thereby ensuring the rf performance of the rf system and the electronic device.

Specifically, at least one of the transmission chain 310 and the reception chain 320 of the radio frequency channel has the radio frequency path configuration unit 200. That is, the radio frequency path configuration unit 200 may be used in the transmission chain 310 and also applied in the reception chain 320, or the radio frequency path configuration unit 200 may also be applied to both the transmission chain 310 and the reception chain 320. When the rf path configuration unit 200 is applied to the transmitting chain 310 and the receiving chain 320 at the same time, in some embodiments, the transmitting chain 310 and the receiving chain 320 may also share one rf path configuration unit 200 at the same time, so as to simplify the number of rf devices in the rf front-end module 300.

The radio frequency path configuration unit 200 may be configured to replace the combiner 350 in the transmitting link 310 and the receiving link 320 and the switch 340 connected to the combiner 350, so as to meet the combining requirement and the single-state transmission requirement of different radio frequency signals in the radio frequency channel, and compared with the related art, the insertion loss of the radio frequency front-end module 300 and the radio frequency system during the single-state transmission of the radio frequency signals in different frequency bands is greatly reduced, so that the setting manner of the radio frequency path configuration unit 200 in the radio frequency front-end module 300 is more diversified.

Referring to fig. 17, an end of the trap unit 221 in the rf path configuration unit 200, which is away from the first interface (i.e., the first connection end 2214), forms an internal interface, and a second interface in the rf path configuration unit 200 forms an external interface, so as to connect to the antenna system 500 through the external interface. The rf path configuration unit 200 communicates with other rf devices in the transmitting chain 310 or the receiving chain 320 through an internal interface, so as to connect the rf path configuration unit 200 with the rf channel.

It should be noted that, the transmitting chain 310 and the receiving chain 320 may refer to the related description in the foregoing, and further description is not repeated here. Therefore, specific connections of the radio frequency path configuration unit 200 to the transmission link 310 and the reception link 320 may refer to connections of the combiner and the switch 340 in the radio frequency channel in the related art, and in this embodiment, no further description is given.

It should be noted that, when the radio frequency path configuration unit 200 is applied to the receiving link 320, and when the radio frequency path configuration unit 200 receives a receiving signal of the antenna system, if the receiving signal includes a plurality of radio frequency signals of different frequency bands, combiners of different frequency specifications may be formed in the radio frequency path configuration unit 200 through mutual combination between different notch units 221 in the notch network 220 and the first switch module 210, so as to implement frequency selection of different frequencies through the combiner pairs of different frequency specifications, so as to separate the radio frequency signals of different frequency bands.

The radio frequency path configuration unit 200 is configured to receive the transmission signals of different frequency bands through the internal interface, receive the reception signals of different frequency bands through the external interface, and transmit the reception signals to the reception link 320; wherein the transmitting signal and the receiving signal are radio frequency signals. Through the arrangement of the radio frequency path, the radio frequency front-end module 300 can be favorable for transmitting radio frequency signals of different frequency bands, so that the wireless communication function of the electronic device is realized.

In order to avoid the radiation performance change of each Antenna of the electronic device, which greatly reduces the Antenna radiation efficiency and generates a phenomenon similar to 'death handshake', the conventional electronic device mostly adopts a Multi-Antenna switching scheme, that is, when the electronic device senses that the performance of a certain Antenna is greatly reduced, the electronic device can be actively switched to other antennas with better performance of the terminal device for receiving or transmitting (hereinafter, referred to as transceiving for short), which is generally called dual-Antenna switching (TAS) or Multi-Antenna switching (MAS).

The following description will be made by taking TAS as an example.

In the NSA mode, NR and LTE can both independently perform TAS functions and perform TAS services. Based on this, in the NSA mode, the rf front end module 300 may perform the TAS service in the NR frequency band and the TAS service in the LTE frequency band at the same time. In the NR frequency range TAS service, a Sounding Reference Signal (SRS) service is required to be performed on a radio frequency Signal in the NR frequency range, that is, the SRS is transmitted to a base station through a plurality of antennas, so as to achieve better downlink experience of a terminal device (that is, from the base station to an electronic device or from the electronic device to the electronic device). As can be seen, when performing TAS service, the NR band also performs SRS service. Therefore, in the NSA mode, the rf front-end module 300 may also perform the SRS service in the NR frequency band and the TAS service in the LTE frequency band at the same time. The scenarios such as ENDC and CA have a double-task parallel scenario.

Fig. 18 illustrates a connection diagram of a radio frequency system provided in the related art.

Referring to fig. 18, in the radio frequency system in the related art, in the NSA mode, the SRS service in the NR frequency band is an SRS service of n41, and the TAS service in the LTE frequency band is a TAS service of B3. In this scheme, the switch 340 of the radio frequency system includes a first switch 340a and a second switch 340b, and the antenna system 500 includes 4 antennas, namely a first antenna 511a, a second antenna 512a, a third antenna 521a and a fourth antenna 522a, respectively, where the first antenna 511a and the second antenna 512a may be main set antennas (i.e., antennas having both transmitting and receiving functions), and the third antenna 521a and the fourth antenna 522a may only be diversity antennas (i.e., antennas having only receiving function). The first antenna 511a and the second antenna 512a are connected to different interfaces of the first switch 340a, and the third antenna 521a and the fourth antenna 522a are connected to different interfaces of the second switch 340 b. When the SRS service of n41 is performed by the radio frequency system in this scheme, only the polling mode of 1T2R is supported, that is, one antenna, for example, the first antenna 511a is selected from the first antenna 511a and the second antenna 512a as a transmitting antenna, one antenna is selected from the third antenna 521a and the fourth antenna 522a as a receiving antenna, and the first antenna 511a as the transmitting antenna and the third antenna 521a or the fourth antenna 522a as the receiving antenna perform reception together, thereby implementing the 1-transmission-2-reception operation mode.

Referring to fig. 18, during the execution of the SRS service of n41, the SRS of n41 is polled in the first antenna 511a, the second antenna 512a, the third antenna 521a and the fourth antenna 522a, which requires that n41_ TRX for transmitting the SRS of n41 can be connected to the four antennas, so that the SRS of n41 can be transmitted to the four antennas for polling.

During the execution of the TAS service of B3, the first antenna 511a and the second antenna 512a may be switched to select the better antenna for the main set reception and transmission, which requires that B3_ TRX for transmitting the B3 signal may be connected to both the first antenna 511a and the second antenna 512a. Specifically, the B3_ TRX for transmitting the B3 signal may be connected to the second antenna 512a through the channel 1-a in the first switch 340a (may be connected to the first antenna 511a to implement transmission and main set reception of the B3 signal, and at this time, the B3_ DRX may be connected to the second antenna 512a through the channel 3-B in the first switch 340a to implement diversity reception of the B3 signal, and at this time, the B3_ TRX for transmitting the B3 signal may also be connected to the second antenna 512a through the channel 1-B in the first switch 340a to implement transmission and main set reception of the B3 signal, and at this time, the B3_ DRX may also be connected to the first antenna 511a through the channel 3-a in the first switch 340a to implement diversity reception of the B3 signal.

It should be noted that, the channel 1-a in the first switch 340a may be understood as that the interface 1 in the first switch 340a is communicated with the interface a, and further explanation of other channels in the first switch 340a may refer to the channel 1-a in the first switch 340a for explanation, and in this embodiment, no further explanation is made for other channels in the first switch 340 a.

Referring to fig. 18, since the TAS service of B3 can only be switched between the first antenna 511a and the second antenna 512a, and the B3 signal and the SRS signal of n41 are combined into one path at the interface 1 of the first switch module 210, the following scenarios may occur during the process of executing the SRS service of n41 and the TAS service of B3 simultaneously:

when B3_ TRX for transmitting B3 signals is connected to the first antenna 511a through the channel 1-a (i.e., the interface 1 is communicated with the interface a) in the first switch 340a, and the SRS traffic of n41 needs to be polled to the second antenna 512a through the channel 1-B in the first switch 340a, since B3_ TRX for transmitting B3 signals and n41_ TRX for transmitting SRS signals of n41 are combined into one path in the interface 1 of the first switch 340a, the SRS traffic of n41 and the TAS traffic of B3 collide with each other, which results in that the radio frequency system in the related art cannot poll to the second antenna 512a in the NSA mode.

Fig. 19 is a schematic diagram illustrating a connection between an rf front-end module and an antenna system.

For this reason, on the basis of the above, the present embodiment further provides a radio frequency system, as shown in fig. 19, the radio frequency system includes a radio frequency transceiver unit 400, an antenna system 500, and the radio frequency front end module 300 of the present embodiment, where the antenna system 500 includes multiple antennas, and the antennas are configured to transmit radio frequency signals of different frequency bands. The rf front-end module 300 is connected to the antenna through an external interface (as shown in fig. 19). The rf transceiver unit 400 is configured to control the communication between the first interface and the second interface in the first switch module 210 of the rf front-end module 300.

Thus, the radio frequency transceiving unit 400 and the radio frequency front-end module 300 can be sequentially connected with the antenna, so that the transceiving of radio frequency signals of different frequency bands is realized, meanwhile, the communication between the first interface and the second interface in the first switch module 210 can be controlled through the radio frequency transceiving unit 400, the combined state or the single state transmission of the radio frequency signals of different frequency bands is met, so that the radio frequency signals of different frequency bands can share one antenna to receive and transmit the radio frequency signals of different frequency bands, the switching among different antennas can be realized, and the transceiving performance of a radio frequency system for the radio frequency signals of different frequency bands is ensured.

Referring to fig. 19, the antenna system 500 may include a first antenna 511 and a second antenna 512, where the first antenna 511 and the second antenna 512 are configured to transmit a transmission signal of different frequency bands and receive a reception signal of different frequency bands, the transmission signal may also be referred to as an uplink signal, and the reception signal may also be referred to as a downlink signal. The transmission signal and the reception signal are radio frequency signals. The first antenna 511 and the second antenna 512 are correspondingly connected to two second interfaces in the rf front-end module 300. The first antenna 511 and the second antenna 512 may be understood as the main set antenna 510 in the antenna system 500. Therefore, after the electronic device senses that the performance of a certain antenna, such as the first antenna 511, is greatly reduced, the electronic device can actively switch to another antenna with better performance, such as the second antenna 512, of the terminal device, and perform receiving or transmitting through the second antenna 512. This scheme performed by the electronic device is generally referred to as a Transmit Antenna Switch (TAS).

In some embodiments, as shown in fig. 19, the antenna system 500 may further include a third antenna 521 and a fourth antenna 522, and the third antenna 521 and the fourth antenna 522 may be referred to as a diversity antenna 520. The radio frequency channel of the radio frequency front end module 300 may further include a third switch module 370, where the third switch module 370 has a fifth interface side 371 and a sixth interface side 372, the fifth interface side 371 has at least two (e.g., three, etc.) fifth interfaces, the sixth interface side 372 has a plurality of sixth interfaces, each fifth interface is configured to be selectively connected to each sixth interface, and the third switch module 370 is respectively connected to one of the trap unit 221, the third antenna 521, and the fourth antenna 522 in the radio frequency front end module 300 through the sixth interfaces. The number of the fifth interface and the sixth interface may be equal or different. Illustratively, the number of fifth and sixth interfaces may include, but is not limited to, three. The third antenna 521, the fourth antenna 522 and the notch unit 221 are respectively connected to different sixth interfaces of the third switch module 370.

In this way, through the setting of the third switch module 370, in the process that radio frequency signals of different frequency bands can be connected to the first antenna 511 and the second antenna 512 through the third switch module 370, the notch processing is performed through the notch unit 221, so as to ensure the single-state high-performance transmission of the radio frequency signals in the radio frequency system, and at the same time, the connection between the radio frequency front-end module 300 and the diversity antenna 520 can be realized, so that the radio frequency system and the electronic device can support NSA scene n41 under four antennas without interrupting the 14tr SRS polling of the LTE main diversity.

Here, 1T4R may be understood as an operating mode in which one of the first antenna 511 and the second antenna 512 is selected as a transmitting antenna, and four of the antenna systems 500 are all used as receiving antennas, so as to implement 1 transmitting and 4 receiving.

Taking the radio frequency signal in the B40 frequency band as an example, the insertion loss of the radio frequency signal in the B40 frequency band is tested by the radio frequency system shown in fig. 18 and the radio frequency system shown in fig. 19 respectively in a single-state transmission manner. The results show that when the radio frequency signal of the B40 frequency band passes through the radio frequency system as shown in fig. 18, the insertion loss in the radio frequency channel is 2.7db; while the rf signal in the B40 band passes through the rf system as shown in fig. 19, the insertion loss in the rf channel is 1.8db. Therefore, it is further verified that when radio frequency signals of different frequency bands pass through the radio frequency system of the embodiment of the application in a single-state transmission mode, the insertion loss is small, and single-state high-performance transmission of the radio frequency signals in the radio frequency system can be ensured.

Referring to fig. 19, in the process of executing the SRS service of n41, n41_ TRX for transmitting the SRS of n41 may be connected to the fourth antenna 522 through the channels 2-a of the third switching module 370, connected to the third antenna 521 through the channels 2-B of the third switching module 370, connected to the first antenna 511 through the channels 2-C of the third switching module 370 and the channel a-1 of the first switching module 210, and connected to the second antenna 512 through the channels 2-C of the third switching module 370 and the channel a-2 of the first switching module 210, so that the SRS of n41 may be transmitted to the first antenna 511, the second antenna 512, the third antenna 521 and the fourth antenna 522, thereby implementing polling among the first antenna 511, the second antenna 512, the third antenna 521 and the fourth antenna 522.

It should be noted that, since the switching is performed only in the first antenna 511 and the second antenna 512 during the execution of the TAS service of B3, the SRS service at n41 and the TAS service of B3 collide with each other, and the collision generally occurs in the first antenna 511 and the second antenna 512. In this embodiment, when the SRS service of n41 is polled by the first antenna 511 and the second antenna 512, the SRS service of n41 and the TAS service of B3 can be effectively prevented from colliding, so that the electronic device can support the 15 t4r SRS polling of the LTE main diversity without interruption by the NSA scene n41 under four antennas.

In the following, with reference to different scenarios, the TAS service of B3 is described when the SRS service of n41 is polled by the first antenna 511 and the second antenna 512.

Scene one

Referring to fig. 19, when the transmission signal (e.g., SRS) of n41 is transmitted from n41_ TRX through the 2-C channel of the third switch module 370 and the channel a-1 of the first switch module 210 to the first antenna 511 and radiated through the first antenna 511, the main set reception signal of n41 shares the path of the transmission signal of n41 in the rf front-end module 300. As the second interface of the first switch module 210 can be connected to a plurality of first interfaces at the same time to form a novel combiner, referring to fig. 19, in the process of executing the TAS service of B3, the transmission signal of B3 can be connected to the first antenna 511 through the channel C-1 of the first switch module 210 by B3_ TRX, and radiated by the first antenna 511; the main set of received signals of B3 may also be shared with the transmitted signals of B3 in the path of the rf front-end module 300.

Referring to fig. 19, at this time, the diversity received signal of B3 may be received by the second antenna 512, and after the diversity received signal of B3 is received by the second antenna 512, the diversity received signal may be transmitted to the receiving link 320 of the rf front-end module 300 via the channels 2-B and B3_ DRX of the first switch module 210. The MIMO diversity reception signals of n41 may also be transmitted to the reception chain 320 through the diversity reception path in the rf front-end module 300 by sharing the diversity reception signals of B3. This ensures that the primary and diversity reception paths of B3 are connected and that traffic in the B3 band is not interrupted by traffic in the n41 band.

Scene two

Fig. 20 is a schematic diagram illustrating a connection between an rf front-end module and an antenna system.

Referring to fig. 20, when a transmission signal (e.g., SRS) of n41 is transmitted from n41_ TRX through the 2-C channel of the third switch module 370 and the a-1 channel of the first switch module 210 and is radiated through the first antenna 511, the main set reception signal of n41 shares a path of the transmission signal of n41 in the rf front-end module 300. During the execution of the TAS service of B3, the transmission signal of B3 may be connected to the second antenna 512 through the channel C-2 of the first switch module 210 by B3_ TRX, and radiated by the second antenna 512; the main set of received signals of B3 may also be shared with the transmitted signals of B3 in the path of the rf front-end module 300.

As the second interface of the first switch module 210 may be connected to a plurality of first interfaces at the same time to form a novel combiner, as shown in fig. 20, at this time, the diversity received signal of B3 may be received by the first antenna 511, and after the diversity received signal of B3 is received by the first antenna 511, the diversity received signal may be transmitted to the receiving link 320 of the rf front-end module 300 through the channels 1-B and B3_ DRX of the first switch module 210. The MIMO diversity reception signal of n41 may be transmitted to the reception chain 320 through the diversity reception path in the rf front-end module 300 by sharing the diversity reception signal of B3. This ensures that the primary and diversity reception paths of B3 are connected and that traffic in the B3 band is not interrupted by traffic in the n41 band.

Scene three

Fig. 21 illustrates a third connection diagram of the rf front-end module and the antenna system.

Referring to fig. 21, when a transmission signal (e.g., SRS signal) of n41 is transmitted from n41_ TRX through the channels 2-C of the third switch module 370 and the channels a-2 of the first switch module 210 and is connected to the second antenna 512, and is radiated through the second antenna 512, the main set reception signal of n41 shares the path of the transmission signal of n41 in the rf front-end module 300. During the execution of the TAS service of B3, the transmission signal of B3 may be connected to the first antenna 511 through the channel C-1 of the first switch module 210 by B3_ TRX, and radiated through the first antenna 511; the main set of received signals of B3 may also be shared with the transmitted signals of B3 in the path of the rf front-end module 300.

As the second interface of the first switch module 210 may be connected to a plurality of first interfaces at the same time to form a novel combiner, as shown in fig. 21, the diversity reception signal of B3 may be received by the second antenna 512, and after the diversity reception signal of B3 is received by the second antenna 512, the diversity reception signal may be transmitted to the reception link 320 of the rf front-end module 300 through the channels 2-B and B3_ DRX of the first switch module 210. The MIMO diversity reception signal of n41 may be transmitted to the reception chain 320 through the diversity reception path in the rf front-end module 300 by sharing the diversity reception signal of B3. This ensures that the primary and diversity reception paths of B3 are connected and that traffic in the B3 band is not interrupted by traffic in the n41 band.

Scene four

Fig. 22 illustrates a fourth connection diagram of the rf front-end module and the antenna system.

Referring to fig. 22, when a transmission signal (e.g., SRS signal) of n41 is transmitted from n41_ TRX through the channels 2-C of the third switch module 370 and the channels a-2 of the first switch module 210 and is connected to the second antenna 512, and is radiated through the second antenna 512, the main set reception signal of n41 shares the path of the transmission signal of n41 in the rf front-end module 300. As the second interface of the first switch module 210 may be connected to multiple first interfaces at the same time to form a novel combiner, referring to fig. 22, in the process of executing the TAS service of B3, the transmission signal of B3 may be connected to the second antenna 512 through the channel C-2 of the first switch module 210 by B3_ TRX, and radiated by the second antenna 512; the main set of received signals of B3 may also be shared with the transmitted signals of B3 in the path of the rf front-end module 300.

Referring to fig. 22, at this time, the diversity received signal of B3 may be received by the first antenna 511, and after the diversity received signal of B3 is received by the first antenna 511, the diversity received signal may be transmitted to the receiving link 320 of the rf front-end module 300 through the channels 1-B and B3_ DRX of the first switch module 210. The MIMO diversity reception signals of n41 may also be transmitted to the reception chain 320 through the diversity reception path in the rf front-end module 300 by sharing the diversity reception signals of B3. This ensures that the main and diversity reception paths of B3 are connected and the traffic in the B3 band is not interrupted by the traffic in the n41 band.

Therefore, the radio frequency system and the electronic device in the embodiment of the application can realize that under four antennas, the NSA scene n41 does not interrupt 1T4R SRS polling of the LTE main diversity. The electronic device provided by the application comprises the radio frequency path configuration unit 200, the radio frequency front-end module 300 and the radio frequency system, so that radio frequency signals of different frequency bands can be transmitted in a combined state or a single state transmission mode at a wireless communication system transmission end in the electronic device according to transmission requirements, insertion loss of the radio frequency signals of different frequency bands during single state transmission can be reduced, and the electronic device can support that the 1T4R SRS polling of LTE main diversity is not interrupted by NSA scene n41 under four antennas, so that the electronic device has better radio frequency performance. In addition, the electronic device of the embodiment of the present application also has the remaining beneficial effects of the radio frequency path configuration unit 200, the radio frequency front end module 300, and the radio frequency system, which are not further described herein.

The radio frequency path configuration unit 200 of the embodiment of the present application utilizes the characteristics of the multi-switch 340 of the first switch module 210 to add notch networks 220 formed by notch units 221 with different frequencies to different interfaces of the first switch module 210, and relatively keep notch frequency points (i.e., rejection frequency points) of the notch units 221 away from the pass bands corresponding to the notch units 221, so as to ensure that the insertion loss of radio frequency signals of different frequency bands is minimum during the single-state transmission; when the first switch module 210 is turned on more, the notch units 221 and the first switch module 210 can be combined to form a combiner 350, so as to realize the frequency combining function.

In the description of the embodiments of the present application, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, a fixed connection, an indirect connection via an intermediary, a connection between two elements, or an interaction between two elements. The specific meanings of the above terms in the embodiments of the present application can be understood by those of ordinary skill in the art according to specific situations.

The terms "first," "second," "third," "fourth," and the like in the description and in the claims of the embodiments of the application and in the drawings described above, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

Claims (18)

1. A radio frequency channel configuration unit is characterized by comprising a first switch module and a trap network, wherein the first switch module is a multi-way selector switch, the first switch module is provided with a first interface side and a second interface side, the first interface side is provided with at least two first interfaces, and the second interface side is provided with at least one second interface;

the notch network comprises at least two notch units, the number of the first interfaces is larger than or equal to the number of the notch units, different notch units in the notch network are used for transmitting radio frequency signals of different frequency bands, and the notch units have pass bands matched with the transmitted radio frequency signals;

each notch unit is correspondingly connected with one first interface, each first interface is configured to be selectively connected with each second interface so as to form a plurality of radio frequency paths for transmitting the radio frequency signals, and each radio frequency path comprises at least one of a combination path and a single-path.

2. The RF path configurator of claim 1, wherein said notching unit is configured to notch said transmitted RF signal to block the RF signal corresponding to a stop band of said notching unit from passing through, wherein said notching unit has a rejection rate of less than or equal to 10db for said RF signal corresponding to its notch frequency point, and wherein said notch unit stop band includes said notch frequency point.

3. The RF path configuration unit of claim 2 wherein the notch network includes at least two of a first notch unit, a second notch unit and a third notch unit, the RF signals including at least two of a first RF signal, a second RF signal and a third RF signal of different frequency bands;

the first notch unit is provided with a first passband corresponding to the frequency band of the first radio frequency signal and a first stopband corresponding to the frequency bands of the second radio frequency signal and the third radio frequency signal; the second notch unit is provided with a second passband corresponding to the frequency band of the second radio frequency signal and a second stopband corresponding to the frequency bands of the first radio frequency signal and the third radio frequency signal; the third notch unit has a third pass band and a third stop band, the third pass band corresponds to a frequency band for the third radio frequency signal, and the third stop band corresponds to a frequency band for the first radio frequency signal and the second radio frequency signal.

4. The RF path configuration unit according to claim 1, wherein the combining path has a common transmission end and at least two branch transmission ends, the branch transmission ends are all connected to the common transmission end, and the RF signals of different frequency bands are transmitted to the common transmission end through the different branch transmission ends to form a combined signal.

5. The RF path configuration unit of claim 4 wherein the second interface side has at least two of the second interfaces, the number of second interfaces being greater than or equal to the number of notch units.

6. The RF path configuration unit of claim 5, wherein when at least two of the notch units are connected to the same second interface through the corresponding first interfaces, the second interface and the notch unit form the combining path through the first interfaces.

7. The RF path configuration unit of claim 5, wherein when at least two of the trap units are connected to different second interfaces through the corresponding first interfaces, the trap unit, the first interfaces and the second interfaces are connected in sequence to form the single path.

8. The RF path configuration unit according to claim 5, wherein the first switch module has a plurality of first interfaces, and the number of the first interfaces is greater than or equal to the number of the second interfaces.

9. The rf path configuration unit of any of claims 1-8, wherein the notch unit has a first connection side and a second connection side, the first connection side having a first port, the second connection side having a second port, the notch unit being connected to the first interface through the second port, the second port being configured to be selectively connectable to each of the first ports when the first connection side has at least two of the first ports.

10. The radio frequency path configuration unit according to claim 9, wherein the trap unit comprises a trap assembly comprising at least one trap having a first connection end at the first connection side, the first connection end constituting the first port, the trap having a second connection end at the second connection side, the trap being connected to the first interface via the second connection end, the trap having the pass band adapted to the transmitted radio frequency signal.

11. The radio frequency path configuration unit according to claim 10, wherein the trap assembly comprises at least two traps, the trap unit comprises a second switch module, the second switch module has a third interface side and a fourth interface side, the third interface side has a third interface, the number of the third interfaces is greater than or equal to the number of the traps in the trap assembly, and each of the traps in the trap assembly is connected to one of the third interfaces;

the fourth interface side is provided with a fourth interface, the fourth interface forms the second port, the fourth interface is configured to be selectively connected with each third interface, and the fourth interface is positioned on the second connection side and connected with the first interface.

12. A radio frequency front end module, characterized in that the radio frequency front end module has a radio frequency channel, and the radio frequency channel has the radio frequency channel configuration unit according to any one of claims 1-11 therein.

13. The rf front-end module of claim 12, wherein the rf channel comprises a transmit chain and a receive chain, at least one of the transmit chain and the receive chain having the rf path configuration unit.

14. The rf front-end module of claim 13, wherein an end of the trap unit in the rf path configuration unit away from the first interface forms an internal interface, a second interface in the rf path configuration unit forms an external interface, and the rf path configuration unit is connected to other rf devices in the transmit chain or the receive chain through the internal interface.

15. A radio frequency system, comprising a radio frequency transceiver unit, an antenna system and the radio frequency front end module as claimed in any of claims 12 to 14, wherein the antenna system comprises a plurality of antennas, the antennas are configured to transmit radio frequency signals of different frequency bands, the radio frequency front end module is connected to the antennas through an external interface, the radio frequency transceiver unit is connected to a side of the radio frequency front end module facing away from the antennas, and the radio frequency transceiver unit is configured to control communication between a first interface and a second interface in a first switch module in the radio frequency front end module.

16. The rf system according to claim 15, wherein the antenna system includes a first antenna and a second antenna, the first antenna and the second antenna are configured to transmit transmission signals of different frequency bands and receive reception signals of different frequency bands, the transmission signals and the reception signals are rf signals, and the first antenna and the second antenna are correspondingly connected to two second interfaces in the rf front-end module.

17. The rf system of claim 16, wherein the antenna system further comprises a third antenna and a fourth antenna, the rf front-end module comprises a third switch module in the rf channel, the third switch module has a fifth interface side and a sixth interface side, the fifth interface side has at least two fifth interfaces, the sixth interface side has a plurality of sixth interfaces, each of the fifth interfaces is configured to be selectively connected to each of the sixth interfaces, and the third switch module is connected to one of the trap unit, the third antenna and the fourth antenna in the rf front-end module through the sixth interfaces.

18. An electronic device, comprising a baseband chip and a radio frequency system according to any of claims 15-17, the radio frequency system being connected to the baseband chip.

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