WO2023061090A1

WO2023061090A1 - Radio frequency front-end module covering multiple frequency bands and wireless communication device

Info

Publication number: WO2023061090A1
Application number: PCT/CN2022/116422
Authority: WO
Inventors: 胡世福; 郭嘉帅
Original assignee: 深圳飞骧科技股份有限公司
Priority date: 2021-10-15
Filing date: 2022-09-01
Publication date: 2023-04-20
Also published as: CN215990786U

Abstract

Embodiments of the present utility model disclose a radio frequency (RF) front-end module covering multiple frequency bands and a wireless communication device, the RF front-end module comprising an RF transceiver, a first power amplifier working in a first frequency band, a second power amplifier working in a second frequency band, a first low-noise amplifier, at least three band-pass filters, a first selector switch, a second selector switch, a third selector switch and a first antenna; receiving and transmitting channels of the first frequency band and the second frequency band may be selected by means of the first to third selector switches, and at least one receiving and transmitting channel in the first frequency band and the second frequency band is further subdivided into a plurality of independent channels by providing the plurality of band-pass filters. Therefore, it is guaranteed that the plurality of subdivided frequency bands are provided with dedicated filters, thereby suppressing to a great extent out-of-band interference while in-band characteristics are ensured, and transmitting and receiving performance is guaranteed.

Description

A radio frequency front-end module covering multiple frequency bands and wireless communication equipment

technical field

The utility model relates to the technical field of wireless communication, in particular to a radio frequency front-end module covering multiple frequency bands and wireless communication equipment.

Background technique

Commonly used 5G NR (fifth generation mobile communication technology new air interface) RF front-end architecture covering both N77 (3300-4200MHz) and N79 (4400-5000MHz) frequency bands, including Transceiver (radio frequency transceiver), PA (power amplifier), LNA (Low Noise Amplifier), RF Switch (Radio Frequency Switch), Filter (Filter) and Antenna (Antenna), as shown in Figure 1, Figure 1 is a two-transmit and two-receive RF front-end architecture, each transmit and receive with N77 and The N79 working frequency band is used as a distinction.

For the N77 transceiver link 11, its transmit link is at first that the power amplifier 111 carries out power amplification to the signal sent by the radio frequency transceiver 10, and then switches to TX ( Transmitting) state, then pass through the N77 bandpass filter 113 to filter out the signal outside the passband, and finally the signal is transmitted through the N77 antenna 114; and the receiving link in the N77 transceiver link 11 is a reverse process of transmitting, at first it is N77 antenna 114 receives signal and enters N77 band-pass filter 113 to filter the out-of-band interference signal, then RF switch 112 switches to RX (receiving) state, then enters low noise amplifier 115 to carry out low noise power amplification, then enters radio frequency transceiver 110 For subsequent processing. The N79 transceiver link 12 is consistent with the N77 architecture, and the difference is only in the operating frequency.

However, there are the following disadvantages in the above architecture:

Taking the N77 link as an example, the frequency range of N77 is 3300-4200MHz, including LTE B42 (3400-3600MHz), B43 (3600-3800MHz), B48 (3550-3700MHz), and N78 (3300-3800MHz) etc. sub-band. Since the N77 broadband filter is directly used in the link, when the system works in these subdivided frequency bands, the in-band characteristics and out-of-band suppression cannot be guaranteed to the greatest extent, thus affecting the system indicators to a certain extent.

Utility model content

The embodiment of the utility model provides a radio frequency front-end module and wireless communication equipment covering multiple frequency bands, which can ensure the in-band characteristics and out-of-band suppression at each operating frequency to the greatest extent.

In order to solve the above technical problems, in the first aspect, the utility model provides a radio frequency front-end module covering multiple frequency bands, including a radio frequency transceiver, a first power amplifier working in the first frequency band, and a second power amplifier working in the second frequency band , a first low noise amplifier, at least three bandpass filters, a first selection switch, a second selection switch, a third selection switch, and a first antenna;

The working frequency band of at least one of the band-pass filters is within one of the first frequency band and the second frequency band, and the working frequency bands of at least two of the band-pass filters are in the first frequency band and within another frequency band of said second frequency band;

The first selection switch, the second selection switch and the third selection switch each have a plurality of selection terminals, the first selection switch has three selection terminals, and the number of selection terminals of the second selection switch and the third selection switch The same as the number of the band-pass filter; the first power amplifier, the second power amplifier and the first low-noise amplifier are respectively connected to the radio frequency transceiver, and the three of the first selection switch The selection end is respectively connected to the first power amplifier, the second power amplifier and the first low noise amplifier, the common end of the first selection switch is connected to the common end of the second selection switch, and the One end of a plurality of band-pass filters is respectively connected to a plurality of selection ends of the second selection switch in one-to-one correspondence, and the other end of the plurality of band-pass filters is respectively connected to a plurality of selection ends of the third selection switch. One-to-one connection, the common end of the third selection switch is connected to the first antenna.

Wherein, a second antenna is further included, and the third selection switch has two common terminals, one of which is connected to the first antenna, and the other common terminal is connected to the second antenna.

Wherein, it also includes a fourth selection switch, a two-port duplexer and a second low-noise amplifier;

The second antenna is connected to the common terminal of the third selection switch through the fourth selection switch, wherein the two selection terminals of the fourth selection switch are connected to the two-port duplexer and the third selection switch respectively. The other said common end of the selection switch is connected, and the common end of the fourth selection switch is connected with the second antenna; the two-port duplexer communicates with the radio frequency through the second low noise amplifier machine connection.

Wherein, the first frequency band is N77 (3300-4200MHz) frequency band, and the second frequency band is N79 (4400-5000MHz) frequency band.

Wherein, the operating frequency bands of the plurality of bandpass filters are B42 (3400-3600MHz), B43 (3600-3800MHz), B48 (3550-3700MHz), N78 (3300-3800MHz), N77 (3300-4200MHz) and N79 (4400-5000MHz) frequency band.

In the second aspect, the present utility model also provides a wireless communication device, including the radio frequency front-end module covering multiple frequency bands described in any one of the above.

Beneficial effects: the radio frequency front-end module covering multiple frequency bands of the utility model includes a radio frequency transceiver, a first power amplifier working in the first frequency band, a second power amplifier working in the second frequency band, a first low noise amplifier, at least three a bandpass filter, a first selector switch, a second selector switch, a third selector switch and a first antenna; wherein at least one of the bandpass filters has an operating frequency band in the first frequency band and the second frequency band Within one of the frequency ranges, at least two operating frequency bands of the bandpass filters are within the other frequency range of the first frequency band and the second frequency band, and the first to third selection switches can be Selecting the transmitting and receiving channels of the first frequency band and the second frequency band, and further subdividing the transmitting and receiving channels of at least one of the first frequency band and the second frequency band into a plurality of independent channels by setting a plurality of bandpass filters, That is to ensure that multiple subdivided frequency bands are equipped with dedicated filters, so that while ensuring in-band characteristics, it can greatly suppress out-of-band interference and ensure transceiver performance.

Description of drawings

The technical solution and beneficial effects of the utility model will be apparent through the detailed description of the specific embodiments of the utility model in conjunction with the accompanying drawings.

FIG. 1 is a schematic structural diagram of a radio frequency front-end architecture in the prior art;

Fig. 2 is a schematic structural diagram of a radio frequency front-end module covering multiple frequency bands provided by an embodiment of the present invention;

Fig. 3 is another schematic structural diagram of a radio frequency front-end module covering multiple frequency bands provided by an embodiment of the present invention;

Fig. 4 is another structural schematic diagram of a radio frequency front-end module covering multiple frequency bands provided by an embodiment of the present invention.

Detailed ways

Referring to the drawings, where the same component symbols represent the same components, the principle of the present invention is illustrated by implementing it in a suitable computing environment. The following descriptions are based on illustrated specific embodiments of the present invention, which should not be construed as limiting other specific embodiments of the present invention that are not described in detail here.

Referring to Fig. 2, the radio frequency front-end module 200 that covers multi-band of the present utility model includes radio frequency transceiver 21, the first power amplifier 22 that works in the first frequency band, the second power amplifier 23 that works in the second frequency band, the first low A noise amplifier 24 , at least three bandpass filters 25 , a first selection switch 26 , a second selection switch 27 , a third selection switch 28 and a first antenna 29 .

Wherein, the first selection switch 26, the second selection switch 27 and the third selection switch 28 all have a plurality of selection terminals, the first selection switch 26 has three selection terminals, the second selection switch 27 and the third selection switch The number of selection terminals of the three selection switches 28 is the same as the number of the band-pass filters 25 . Each of the first selection switch 26 , the second selection switch 27 and the third selection switch 28 has a common terminal.

The first power amplifier 22, the second power amplifier 23 and the first low-noise amplifier 24 are respectively connected to the radio frequency transceiver 21, and the three selection ends of the first selection switch 26 are respectively connected to the The first power amplifier 22, the second power amplifier 23 and the first low noise amplifier 24 are connected. Specifically, the input ends of the first power amplifier 22 and the second power amplifier 23 are respectively connected to the radio frequency transceiver 21, and the output ends of the first power amplifier 22 and the second power amplifier 23 are connected to the first selection switch 26 respectively. Two of the selection terminals are connected, and the input terminal of the first low noise amplifier 24 is connected with the remaining one selection terminal of the first selection switch 26, and the output terminal of the first low noise amplifier 24 is connected with the radio frequency transceiver Machine 21 is connected. The common end of the first selection switch 26 is connected to the common end of the second selection switch 27, and one end of the plurality of bandpass filters 25 is respectively connected to a plurality of selection ends of the second selection switch 27 one by one. Correspondingly connected, the other ends of the plurality of bandpass filters 25 are respectively connected to a plurality of selection ends of the third selection switch 28 in one-to-one correspondence, and the common end of the third selection switch 28 is connected to the first antenna 29.

The first selection switch 26 is used to switch between the transmission channel of the first frequency band and the transmission channel of the second frequency band, and to switch the transmission and reception channels, that is, when the radio frequency front-end module 200 is in the transmission state, and the working frequency band is the first During the first frequency band, the first selector switch 26 selects to connect the first power amplifier 22, when the radio frequency front-end module 200 works in the second frequency band, the first selector switch 26 selects to connect the second power amplifier 23, when the radio frequency front-end module 200 is in In the receiving state, the first selection switch 26 selects to turn on the first low noise amplifier 24 . The second selection switch 27 and the third selection switch 28 are used to realize switching of a plurality of bandpass filters 25 .

The working frequency band of at least one of the band-pass filters 25 is within one of the first frequency band and the second frequency band, and the working frequency bands of at least two of the band-pass filters 25 are within the first frequency band. within the range of one frequency band and the other frequency band of the second frequency band. That is, in the embodiment of the present utility model, at least one frequency band in the first frequency band and the second frequency band is subdivided, and each frequency band is equipped with a dedicated bandpass filter 25. When the output of the radio frequency transceiver 21 is a signal of a certain frequency , the bandpass filter 25 of the corresponding frequency band is selected by the second selection switch 27 and the third selection switch 28 to filter the signal, thereby greatly suppressing the out-of-band interference. Moreover, the same antenna 29 and the same low-noise amplifier 24 are shared for the communication systems of the first frequency band and the second frequency band, which can avoid idleness of the antenna, make full use of resources, and help reduce chip area.

Wherein, the first frequency band may be N77 (3300-4200 MHz) frequency band, and the second frequency band may be N79 (4400-5000 MHz) frequency band. Among them, the frequency range of the N77 frequency band is 3300-4200MHz, which covers LTE's B42 (3400-3600MHz), B43 (3600-3800MHz), B48 (3550-3700MHz), and N78 (3300-3800MHz) and other subdivided frequency bands. In the embodiment of the present utility model, the operating frequency bands of the plurality of bandpass filters 25 are respectively B42 (3400-3600MHz), B43 (3600-3800MHz), B48 (3550-3700MHz), N78 (3300-3800MHz), N77 (3300-4200MHz) and N79 (4400-5000MHz) frequency bands. As a result, multiple subdivided frequency bands are equipped with dedicated band-pass filters 25 for transmitting and receiving, thereby helping to ensure maximum system performance in each frequency band.

Further, referring to FIG. 3 , in another embodiment of the radio frequency front-end module 200 of the present invention, the radio frequency front-end module 200 also includes a second antenna 31, and the third selection switch 28 has two common terminals, one of which is the The common end is connected to the first antenna 29 , and the other common end is connected to the second antenna 31 . Antenna MIMO (Multiple-Input Multiple-Output) is implemented by setting dual antennas, so that the transmission and reception of the antennas can be realized in turn, and the diversity gain of the antenna can be improved.

In addition, referring to FIG. 4 , in another embodiment of the RF front-end module 200 of the present invention, the RF front-end module 200 further includes a fourth selection switch 32 , a two-port duplexer 33 and a second low noise amplifier 34 .

The second antenna is connected to the common terminal of the third selection switch 28 through the fourth selection switch 32, wherein the two selection terminals of the fourth selection switch 32 are connected to the two-port duplexer respectively. 33 is connected to the other said common end of the third selection switch 28, and the common end of the fourth selection switch 32 is connected to the second antenna 31; the two-port duplexer 33 passes through the The second low noise amplifier 34 is connected with the radio frequency transceiver 21 . Wherein, by setting the duplexer 33 and the second low-noise amplifier 34, and then through the selection function of the fourth selection switch 32, an additional receiving path can be added, and the filter of the receiving path uses two ports of N77 and N79 The duplexer 33 performs signal filtering through the two-port duplexer 33, so that the receiving channel can receive signals in both the N77 frequency band and the N79 frequency band, thereby realizing the full frequency band receiving function.

The following takes the radio frequency front-end module 200 shown in FIG. 4 as an example to describe the transceiving process of the radio frequency front-end module of the present invention.

During the transmission state, the radio frequency transceiver 21 outputs a signal of a certain frequency (such as B48), and the frequency of B48 is within the range of the first frequency band. At this time, the first selection switch 26 is switched to the transmission channel, that is, the first power amplifier 22 is selected to be connected. , so as to amplify the power of the signal through the first power amplifier 22 . The second selection switch 27 carries out the corresponding frequency selection, connects the band-pass filter 25 corresponding to the B48 frequency, that is, the band-pass filter 25 whose operating frequency band is B48, and then selects and outputs to the first antenna 29 or the first antenna 29 through the third selection switch 28. The second antenna 31 transmits the signal.

In the receiving state, first the first antenna 29 or the second antenna 31 converts the signal in the free space into an electrical signal and receives it, and then selects the corresponding frequency channel through the third selection switch 28, and enters the band-pass filter of the corresponding frequency 25. After filtering, it is output through the second selection switch 27. At this time, the first selection switch 26 is switched to the receiving channel, that is, the first selection switch 26 is connected to the first low-noise amplifier 24, so that the received signal can cover N77+ at the same time. The broadband first low noise amplifier 24 of the N79 amplifies the signal with low noise and enters the radio frequency transceiver 21 for further processing.

Wherein, if the simultaneous reception of the signals of the two frequency bands N77+N79 is to be realized, the signal reception can be carried out through the second antenna 31, and then the fourth selection switch 32 is switched to the receiving channel where the two-port duplexer 33 is located, and the received signal passes through The duplexer 33 filters the signal, and finally enters the second low-noise amplifier 34 to amplify the signal with low noise and then sends it to the radio frequency transceiver 21 for further processing.

Through the radio frequency front-end module provided by the embodiment of the utility model, it is possible to realize the switching of the transmitting and receiving channels under multiple subdivided frequency bands, and ensure the performance of each operating frequency to the greatest extent, so that each operating frequency can use a dedicated bandpass filter Perform filtering to suppress out-of-band interference to the greatest extent. In addition, the multi-input multi-output function of the antenna can be realized by setting multiple antennas, and the simultaneous receiving function can be realized by setting two-port duplexer channels.

The embodiment of the utility model also provides a wireless communication device, including the radio frequency front-end module described in any one of the above embodiments.

A radio frequency front-end module covering multiple frequency bands and wireless communication equipment provided by the embodiment of the utility model has been introduced in detail above. In this paper, specific examples are used to illustrate the principle and implementation of the utility model. The above embodiments The explanation is only used to help understand the method of the utility model and its core idea; at the same time, for those skilled in the art, according to the idea of the utility model, there will be changes in the specific implementation and scope of application. In summary, As stated above, the contents of this specification should not be construed as limiting the utility model.

Claims

A radio frequency front-end module covering multiple frequency bands, characterized in that it includes a radio frequency transceiver, a first power amplifier operating in the first frequency band, a second power amplifier operating in the second frequency band, a first low noise amplifier, at least three a bandpass filter, a first selection switch, a second selection switch, a third selection switch and a first antenna;

The working frequency band of at least one of the band-pass filters is within one of the first frequency band and the second frequency band, and the working frequency bands of at least two of the band-pass filters are in the first frequency band and within another frequency band of said second frequency band;

The first selection switch, the second selection switch and the third selection switch each have a plurality of selection terminals, the first selection switch has three selection terminals, and the number of selection terminals of the second selection switch and the third selection switch The same as the number of the band-pass filter; the first power amplifier, the second power amplifier and the first low-noise amplifier are respectively connected to the radio frequency transceiver, and the three of the first selection switch The selection end is respectively connected to the first power amplifier, the second power amplifier and the first low noise amplifier, the common end of the first selection switch is connected to the common end of the second selection switch, and the One end of a plurality of band-pass filters is respectively connected to a plurality of selection ends of the second selection switch in one-to-one correspondence, and the other end of the plurality of band-pass filters is respectively connected to a plurality of selection ends of the third selection switch. One-to-one connection, the common end of the third selection switch is connected to the first antenna.
The RF front-end module covering multiple frequency bands according to claim 1, further comprising a second antenna, the third selection switch has two common terminals, one of the common terminals is connected to the first antenna , and the other common end is connected to the second antenna.
The RF front-end module covering multiple frequency bands according to claim 2, further comprising a fourth selection switch, a two-port duplexer and a second low noise amplifier;

The second antenna is connected to the common terminal of the third selection switch through the fourth selection switch, wherein the two selection terminals of the fourth selection switch are connected to the two-port duplexer and the third selection switch respectively. The other said common end of the selection switch is connected, and the common end of the fourth selection switch is connected with the second antenna; the two-port duplexer communicates with the radio frequency through the second low noise amplifier machine connection.
The radio frequency front-end module covering multiple frequency bands according to claim 1, wherein the first frequency band is the N77 (3300-4200MHz) frequency band, and the second frequency band is the N79 (4400-5000MHz) frequency band.
The RF front-end module covering multiple frequency bands according to claim 4, wherein the operating frequency bands of the plurality of bandpass filters are B42 (3400-3600MHz), B43 (3600-3800MHz), B48 (3550- 3700MHz), N78(3300-3800MHz), N77(3300-4200MHz) and N79(4400-5000MHz) frequency bands.
A wireless communication device, characterized by comprising the radio frequency front-end module covering multiple frequency bands according to any one of claims 1-5.