CN219420761U - Radio frequency front end, device and terminal equipment - Google Patents

Abstract

The utility model provides a radio frequency front end, a device and terminal equipment, comprising: the radio frequency transceiver demodulation chip, the power amplifier module, the filter and the duplexer module, the single-pole double-throw switch module, the first switch, the first coupler, the first antenna, the second switch, the second coupler and the second antenna, wherein the filter and the duplexer module comprise a plurality of groups of filters and duplexers, the single-pole double-throw switch module comprises a plurality of single-pole double-throw switches, and the first switch and the second switch are single-pole multiple-throw switches. The radio frequency front end adopts a medium-high frequency antenna and combines a single-pole multi-throw switch, the full-band antenna and the medium-high frequency antenna are respectively and electrically connected with the single-pole multi-throw switch and then are electrically connected with a single-pole double-throw switch module, and CA combination of signals in different frequency bands received and transmitted by different antennas can be flexibly realized through combined control of the single-pole multi-throw switch and the single-pole double-throw switch module. The radio frequency device has simple structure and high cost performance, and has good market value in application.

Description

Radio frequency front end, device and terminal equipment

Technical Field

The utility model relates to the technical field of radio frequency front ends, in particular to a radio frequency front end.

Background

With rapid development of communication technology and more abundant application scenarios of intelligent terminal devices such as smart phones/vehicle-mounted intelligent terminal devices, for example, online videos, online games, application downloading with large data volume, etc., CA (Carrier Aggregation ) functions of the intelligent terminal devices are used more and more frequently.

A common structure of the radio frequency front end of the existing 4G intelligent terminal equipment is shown in fig. 1, and if the CA function is to be realized on the basis of the structure, an antenna 2 and a corresponding single-pole multi-throw switch 1 are needed to be added, and a four-way multiplexer with relatively high model selection is also needed. Especially under the condition that a plurality of different frequency band CA combinations are required to be supported, the structure of the existing 4G radio frequency front end is not flexible enough and even can not be realized.

Disclosure of Invention

The utility model aims to provide a radio frequency front end, a radio frequency front end device and terminal equipment, which can flexibly realize the CA combination function of a plurality of different frequency bands with lower cost.

In order to achieve the above object, the present utility model provides a radio frequency front end, wherein the radio frequency front end includes:

the radio frequency transceiver demodulation chip, the power amplifier module, the filter and duplexer module, the single-pole double-throw switch module, the first switch, the first coupler, the first antenna, the second switch, the second coupler and the second antenna, wherein the filter and duplexer module comprises a plurality of groups of filters and duplexers, the single-pole double-throw switch module comprises a plurality of single-pole double-throw switches, and the first switch and the second switch are single-pole multiple-throw switches;

the first antenna is electrically connected with the output end of the first coupler, the input end of the first coupler is electrically connected with the knife end of the first switch, and the coupling end of the first coupler is electrically connected with the radio frequency transceiver demodulation chip;

one throwing end of the first switch is electrically connected with one throwing end of a single-pole double-throw switch in the single-pole double-throw switch module;

the two antennas are electrically connected with the output end of the second coupler, the input end of the second coupler is electrically connected with the knife end of the second switch, and the coupling end of the second coupler is electrically connected with the radio frequency transceiver demodulation chip;

one throwing end of the second switch is electrically connected with the other throwing end of one single-pole double-throw switch in the single-pole double-throw switch module;

the knife end of each single-pole double-throw switch in the single-pole double-throw switch module is electrically connected with the filter and a group of filters and diplexers of the diplexer module;

the filter and duplexer module is electrically connected with the power amplifier module;

the power amplifier module is electrically connected with the radio frequency transceiver demodulation chip.

Optionally, the number of throws of the second switch is the same as the number of throws of the first switch.

Optionally wherein the second switch is 1 more throw than the first switch, wherein,

one throw end of the second switch is electrically connected with a group of filters and a duplexer of the filter and duplexer module.

Optionally wherein the second switch is 2 more throws than the first switch, wherein,

and two throwing ends in the second switch are electrically connected with a group of filters and a duplexer of the filter and the duplexer module respectively.

The utility model further provides a device, wherein the device comprises the radio frequency front end.

Further, the utility model also provides a terminal device, wherein the terminal device comprises the device.

The utility model is based on the radio frequency front end of the existing single full-band antenna structure, adds the medium-high frequency antenna and combines the single-pole multi-throw switch, wherein the full-band antenna and the medium-high frequency antenna are respectively and electrically connected with the single-pole multi-throw switch and then are electrically connected with the single-pole double-throw switch module, and the CA combination of different frequency band signals received and transmitted by different antennas can be flexibly realized through the combined control of the single-pole multi-throw switch and the single-pole double-throw switch module. The radio frequency front end provided by the utility model has the advantages of simple structure, low cost, capability of flexibly realizing CA functions among various different frequency bands, high cost performance and good market value in application.

Drawings

Other features, objects and advantages of the present utility model will become more apparent upon reading of the detailed description of non-limiting embodiments, made with reference to the accompanying drawings in which:

FIG. 1 is a schematic diagram of a prior art RF front end architecture;

FIG. 2 shows a schematic diagram of a RF front-end architecture according to one embodiment of the present utility model;

FIG. 3 shows a schematic diagram of a RF front-end architecture of an alternative embodiment of the present utility model;

FIG. 4 shows a schematic diagram of a RF front-end architecture of another alternative embodiment of the present utility model;

fig. 5 shows a schematic diagram of a radio frequency front end structure according to yet another alternative embodiment of the utility model;

the same or similar reference numbers in the drawings refer to the same or similar parts.

Detailed Description

The technical conception, specific structure and technical effects of the radio frequency front end, the radio frequency front end device and the terminal equipment provided by the utility model are further described below with reference to the accompanying drawings so as to fully understand the purposes, characteristics and effects of the application. In which embodiments and alternative embodiments of the utility model are shown, it should be understood that those skilled in the art may modify the utility model here described while still achieving the beneficial effects of the utility model. Accordingly, the following description is to be construed as illustrative, and not as a limitation of the present utility model.

A schematic structure of a radio frequency front end according to an embodiment of the present application as shown in fig. 2, where the radio frequency front end includes:

the radio frequency transceiver demodulation chip 6, the power amplifier module 5, the filter and duplexer module 4, the single-pole double-throw switch module 3, the first switch 2, the first coupler 1, the first antenna 8, the second switch 7, the second coupler 10 and the second antenna 9, wherein the filter and duplexer module 4 comprises a plurality of groups of filters 41 and duplexers 42, the single-pole double-throw switch module 3 comprises a plurality of single-pole double-throw switches 31, and the first switch 2 and the second switch 7 are single-pole multiple-throw switches;

the first antenna 8 is electrically connected with the output end of the first coupler 1, the input end of the first coupler 1 is electrically connected with the knife end of the first switch 2, and the coupling end of the first coupler 1 is electrically connected with the radio frequency transceiver demodulation chip 6;

one throw end of the first switch 2 is electrically connected with one throw end of a single-pole double-throw switch 31 in the single-pole double-throw switch module 3;

the second antenna 9 is electrically connected with the output end of the second coupler 10, the input end of the second coupler 10 is electrically connected with the knife end of the second switch 7, and the coupling end of the second coupler 10 is electrically connected with the radio frequency transceiver demodulation chip 6;

one throw end of the second switch 7 is electrically connected with the other throw end of one single-pole double-throw switch 31 in the single-pole double-throw switch module 3;

the pole end of each single-pole double-throw switch 31 in the single-pole double-throw switch module 3 is electrically connected with a group of filters 41 and a duplexer 42 of the filter and duplexer module 4;

the filter and duplexer module 4 is electrically connected with the power amplifier module 5;

the power amplifier module 5 is electrically connected with the radio frequency transceiver demodulation chip 6.

In this embodiment, the first antenna 8 may be an MHB (Middle-High Band) antenna, the second antenna 9 may be an LMHB (Low-Middle-High Band) full Band antenna, and the first coupler 1 and the second coupler 10 are used for detecting end power, and couple radio frequency signals through coupling ends, and serve as a system power control feedback signal to the radio frequency transceiver demodulation chip 6 to control system power. The rf transceiver demodulation chip 6 may implement modulation of a baseband signal to be transmitted into an rf signal or demodulation of a received rf signal into a baseband signal. The filter and diplexer module 4 isolates the transmit and receive signals from each other. The power amplifier module 5 may amplify the transmission signal and may amplify the reception signal with low noise. The CA combination function of different frequency bands can be realized through the control of the first switch 2, the second switch 7 and the single-pole double-throw switch module 3.

The transmitting signals of different frequency bands are sent out through the radio frequency receiving and transmitting demodulation chip 6, after being amplified by the power amplifier module 5, the signals of different frequency bands are output through the filter 41 and the duplexer 42 of the corresponding frequency bands in the filter and duplexer module 4, the signals of different frequency bands can be switched to the second switch 7 through one SPDT switch 31 in the SPDT (Single Pole Double Throw ) switch module 3, and then are transmitted through the second coupler 10 and the second antenna 9, and if signals of a medium-high frequency band are transmitted, the signals can also be switched to the first switch 2 through one SPDT switch 31 in the SPDT switch module 3, and then are transmitted through the first coupler 1 and the first antenna 8.

In the non-CA case, the received signals in different frequency bands may be received by the second antenna 9, passed through the second coupler 10 and the second switch 7, and if the received signals in the middle-high frequency band may also be received by the first antenna 8, passed through the first coupler 1 and the first switch 2, and then may be switched to the filter 41 and the duplexer 42 in the corresponding frequency band in the filter and duplexer module 4 by one SPDT switch 31 in the SPDT switch module 3, transmitted to the power amplifier module 5, amplified by low noise, and then transmitted to the radio frequency transceiver demodulation chip 6 for signal demodulation, and demodulated to obtain the voice signal or the data signal, thereby realizing the communication or the data transmission.

If the CA function is to be implemented, for example, the ca_1a—3a (a carrier wave in each of two frequency bands B1 and B3, and inter-band CA comprising 2 carrier waves) function is to be implemented, the signal in the B1 frequency band can be received through the second antenna 9, and then switched to the filter 41 and the duplexer 42 in the corresponding frequency band in the filter and duplexer module 4 through the second coupler 10 and the second switch 7 and then through one SPDT switch 31 in the SPDT switch module 3, and transmitted to the power amplifier module 5, amplified by low noise, and then transmitted to the radio frequency transceiver demodulation chip 6 for signal demodulation; and the signal in the B3 frequency band is received through the first antenna 8, is switched to the filter 41 and the duplexer 42 in the corresponding frequency band in the filter and duplexer module 4 through the first coupler 1 and the first switch 2 and then through one SPDT switch 31 in the SPDT switch module 3, is transmitted to the power amplifier module 5, is amplified by low noise, and is then transmitted to the radio frequency receiving and transmitting demodulation chip 6 for signal demodulation, so that the signal reception of CA_1A-3A is completed, and CA_1A-3A is realized. Other CA functions between different frequency bands, such as CA combination of a low frequency band and an intermediate frequency band, CA combination of an intermediate frequency band and a high frequency band, CA combination of an intermediate frequency band and an intermediate frequency band, and the like, may be similar, where if the CA combination is a low frequency band, the CA combination is received through the second antenna 9, and if the CA combination is a medium and high frequency band, the CA combination is received through the first antenna 8 or the second antenna 9.

In this embodiment, the rf front-end is based on the existing conventional single full-band antenna structure, and a single-pole multi-throw switch (first switch 2) is added as a middle-high frequency CA independent switch, and an independent middle-high frequency antenna is added as a first antenna 8 for receiving and transmitting signals in a middle-high frequency band, and a second antenna 9 combined with the full-band antenna is used for receiving and transmitting signals in the middle-high frequency band, and also can be used for receiving and transmitting signals in a low frequency band. The CA combined function of low frequency plus intermediate frequency, intermediate frequency plus high frequency or intermediate frequency plus intermediate frequency can be realized at lower cost, and the channel number of the first switch 2 can be adjusted according to the product requirement, so that the number of signal frequency bands can be flexibly adjusted. In addition, the dual-antenna design is adopted, the dual-antenna wireless communication system can be suitable for wider and worse antenna environments, the problem that the intelligent equipment integrated with the radio frequency front end is reduced in communication performance due to the influence of the antenna environments (such as the influence of the mode of a handheld intelligent equipment) is avoided, and better and smoother communication experience can be brought to users.

In an alternative embodiment, the number of throws of the second switch 7 is the same as the number of throws of the first switch 2.

In this alternative embodiment, the number of throws of the second switch 7 is the same as the number of throws of the first switch 2. In the non-CA case, in the signal transceiving of the middle-high frequency band, the second antenna 9 and the first antenna 8 can mutually back up the signal transceiving of the middle-high frequency band, so that the quality of the middle-high frequency environment of the antenna can be improved, wherein each throw end of the first switch 2 and each throw end of the second switch 7 are respectively and correspondingly connected to one throw end of one single-pole double-throw switch 31 of the single-pole double-throw switch module 3, and the pole ends of the single-pole double-throw switch 31 are connected to a filter 41 and a duplexer 42 of a group of corresponding frequency bands of the filter and duplexer module 4. The first switch 2 and the second switch 7 are illustratively single pole, five throw switches, as shown in fig. 3, and can be used to transmit and receive signals in the frequency bands of B1, B3, B7, B40, B41, etc. of medium and high frequencies. In the CA function, each antenna supports a frequency band signal, and CA combination of different frequency bands such as intermediate frequency and high frequency, intermediate frequency and intermediate frequency can be realized.

In another alternative embodiment, the second switch 7 is thrown 1 more than the first switch 2, wherein one throw of the second switch 7 is electrically connected to a set of filters 41 and diplexers 42 of the filter and diplexer module 4.

In this alternative embodiment, the second switch 7 has 1 more throw than the first switch 2. In the non-CA case, in the signal transceiving of the middle-high frequency band, the second antenna 9 and the first antenna 8 can mutually back up the signal transceiving of the middle-high frequency band, so that the quality of the middle-high frequency environment of the antenna can be improved, wherein each throw end of the first switch 2 and each throw end of the second switch 7 are respectively and correspondingly connected to one throw end of one single-pole double-throw switch 31 of the single-pole double-throw switch module 3, and the pole ends of the single-pole double-throw switch 31 are connected to a filter 41 and a duplexer 42 of a group of corresponding frequency bands of the filter and duplexer module 4. In addition, one throw of the second switch 7 is directly connected to a set of filters 41 and diplexers 42 of the corresponding low frequency band of the filter and diplexer module 4. The first switch 2 is a single pole, five throw switch, and the second switch 7 is a single pole, six throw switch, as shown in fig. 4, and the second antenna 9 is used for transmitting and receiving signals in the B1, B3, B7, B40, B41, etc. frequency bands of the middle and high frequencies, and also for transmitting and receiving signals in the B5 or B8 frequency bands of the low frequencies. In realizing the CA function, each antenna supports one frequency band signal, and CA combination of different frequency bands such as low frequency and intermediate frequency, low frequency and high frequency, intermediate frequency and the like can be realized.

In yet another alternative embodiment, the second switch 7 is more than 2 throws than the first switch 2, wherein two output terminals of the second switch 7 are each electrically connected to a set of filters 41 and diplexers 42 of the filter and diplexer module 4, respectively.

In this alternative embodiment, the second switch 7 has 2 more throws than the first switch 2. In the non-CA case, in the signal transceiving of the middle-high frequency band, the second antenna 9 and the first antenna 8 can mutually back up the signal transceiving of the middle-high frequency band, so that the quality of the middle-high frequency environment of the antenna can be improved, wherein each throw end of the first switch 2 and each throw end of the second switch 7 are respectively and correspondingly connected to one throw end of one single-pole double-throw switch 31 of the single-pole double-throw switch module 3, and the pole ends of the single-pole double-throw switch 31 are connected to a filter 41 and a duplexer 42 of a group of corresponding frequency bands of the filter and duplexer module 4. In addition, the two throw ends of the second switch 7 are directly connected to the filter 41 and the diplexer 42 of a set of corresponding low frequency bands of the filter and diplexer module 4, respectively. The first switch 2 is a single pole, five throw switch, and the second switch 7 is a single pole, seven throw switch, as shown in fig. 5, and the second antenna 9 is used for transmitting and receiving signals in the B1, B3, B7, B40, B41, etc. frequency bands of the middle and high frequencies, and also for transmitting and receiving signals in the B5 and B8 frequency bands of the low frequency bands. In realizing the CA function, each antenna supports one frequency band signal, and CA combination of different frequency bands such as low frequency and intermediate frequency, low frequency and high frequency, intermediate frequency and the like can be realized.

Another embodiment of the present application provides an apparatus, wherein the apparatus comprises a radio frequency front end as described in the above embodiments and/or in alternative embodiments.

A further embodiment of the present application provides a terminal device, where the terminal device includes the apparatus described in the foregoing embodiments.

The utility model provides a 4G radio frequency front end, which is added with a medium-high frequency antenna and a single-pole multi-throw switch on the basis of the radio frequency front end of the existing single full-frequency-band antenna structure, wherein the full-frequency-band antenna and the medium-high frequency antenna are respectively and electrically connected with the single-pole multi-throw switch and then are electrically connected with a single-pole double-throw switch module, and CA combination of signals of different frequency bands received and transmitted by different antennas can be flexibly realized through combined control of the single-pole multi-throw switch and the single-pole double-throw switch module. The radio frequency front end provided by the utility model has the advantages of simple structure, low cost, capability of flexibly realizing CA functions among various different frequency bands, high cost performance and good market value in application.

It should be noted that the above embodiments are only for illustrating the technical solution of the present utility model, and do not limit the present utility model. It should be understood by those skilled in the art that any equivalent replacement or modification of the technical solution and technical content disclosed in the present utility model may be made without departing from the scope of the technical solution of the present utility model, and the scope of the present utility model is covered by the scope of protection of the present utility model.

Furthermore, it is evident that the word "comprising" does not exclude other elements, units or circuits, and that the singular does not exclude a plurality. The plurality of constituent elements, units or circuits recited in the claims may also be implemented as one constituent element, unit or circuit. The terms first, second, etc. are used to denote a name, but not any particular order.

Claims (6)

1. A radio frequency front end, the radio frequency front end comprising:

the radio frequency transceiver demodulation chip, the power amplifier module, the filter and duplexer module, the single-pole double-throw switch module, the first switch, the first coupler, the first antenna, the second switch, the second coupler and the second antenna, wherein the filter and duplexer module comprises a plurality of groups of filters and duplexers, the single-pole double-throw switch module comprises a plurality of single-pole double-throw switches, and the first switch and the second switch are single-pole multiple-throw switches;

the first antenna is electrically connected with the output end of the first coupler, the input end of the first coupler is electrically connected with the knife end of the first switch, and the coupling end of the first coupler is electrically connected with the radio frequency transceiver demodulation chip;

one throwing end of the first switch is electrically connected with one throwing end of a single-pole double-throw switch in the single-pole double-throw switch module;

the two antennas are electrically connected with the output of the second coupler, the input end of the second coupler is electrically connected with the knife end of the second switch, and the coupling end of the second coupler is electrically connected with the radio frequency transceiver demodulation chip;

one throwing end of the second switch is electrically connected with the other throwing end of one single-pole double-throw switch in the single-pole double-throw switch module;

the knife end of each single-pole double-throw switch in the single-pole double-throw switch module is electrically connected with the filter and a group of filters and diplexers of the diplexer module;

the filter and duplexer module is electrically connected with the power amplifier module;

the power amplifier module is electrically connected with the radio frequency transceiver demodulation chip.

2. The radio frequency front end of claim 1, wherein the second switch has the same throw as the first switch.

3. The radio frequency front end of claim 1, wherein the second switch is 1 more throw than the first switch, wherein,

one throw end of the second switch is electrically connected with a group of filters and a duplexer of the filter and duplexer module.

4. The radio frequency front end of claim 1, wherein the second switch is 2 more throws than the first switch, wherein,

and two throwing ends in the second switch are electrically connected with a group of filters and a duplexer of the filter and the duplexer module respectively.

5. An apparatus comprising a radio frequency front end as claimed in any one of claims 1 to 4.

6. A terminal device, characterized in that it comprises the apparatus according to claim 5.