CN107689812B - Radio frequency front-end module, mobile terminal and signal processing method - Google Patents
Radio frequency front-end module, mobile terminal and signal processing method Download PDFInfo
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- CN107689812B CN107689812B CN201710772662.4A CN201710772662A CN107689812B CN 107689812 B CN107689812 B CN 107689812B CN 201710772662 A CN201710772662 A CN 201710772662A CN 107689812 B CN107689812 B CN 107689812B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/401—Circuits for selecting or indicating operating mode
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
- H04B1/1018—Means associated with receiver for limiting or suppressing noise or interference noise filters connected between the power supply and the receiver
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
Abstract
The embodiment of the invention discloses a radio frequency front end module, which comprises: the antenna switch is connected with the antenna and the low-loss signal processing module, the antenna switch controls signals received by the antenna to enter the low-loss signal processing module by connecting a preset global system for mobile communication frequency band channel, and the low-loss signal processing module is connected with the signal transceiver and inputs the received signals into the signal transceiver after filtering and amplifying the received signals. The embodiment of the invention also discloses a mobile terminal and a signal processing method, which can improve the signal sensitivity and the conversation quality.
Description
Technical Field
The invention belongs to the technical field of mobile terminals, and particularly relates to a radio frequency front-end module, a mobile terminal and a signal processing method.
Background
As mobile devices become more and more powerful, the supported network frequency bands become more and more, and the radio frequency front-end module becomes an indispensable part of the mobile devices. For example, a mobile phone at least needs to support the following network systems: 2G (2-GENERATION WITH TELEPHONE TECHNOLOGY), 3G (3-GENERATION WITH TELEPHONE TECHNOLOGY), 4G (THE 4TH GENERATION MOBILE COMMUNICATION TECHNOLOGY), and WiFi (WIRELESS FIDELITY), each of which requires its own RF front-end architecture.
In the prior art, a radio frequency front end includes an antenna, and a signal received from the antenna enters a current GSM (Global System for Mobile Communication) frequency band channel and enters a transceiver through a DUPLEXER (DUPLEXER) and other components.
Disclosure of Invention
The embodiment of the invention provides a radio frequency front-end module, a mobile terminal and a signal processing method, which can solve the problems that the sensitivity of GSM frequency band signals is limited and the communication quality is influenced.
A radio frequency front end module provided in a first aspect of an embodiment of the present invention includes:
the antenna comprises an antenna, an antenna switch, a low-loss signal processing module and a signal transceiver;
the antenna switch is connected with the antenna and the low-loss signal processing module, and controls signals received by the antenna to enter the low-loss signal processing module by connecting a preset global system for mobile communication frequency band channel;
and the low-loss signal processing module is connected with the signal transceiver, and inputs the received signals into the signal transceiver after filtering and amplifying the received signals.
The mobile terminal provided in the second aspect of the embodiment of the present invention includes the radio frequency front end module provided in the first aspect of the embodiment of the present invention.
In an embodiment of the present invention, a signal processing method, to which the radio frequency front end module provided in the first aspect of the present invention is applied, includes:
controlling an antenna switch to be connected with a preset global mobile communication system frequency band channel so as to transmit signals received by an antenna to a low-loss signal processing module;
the low-loss signal processing module filters and amplifies the signals;
and transmitting the filtered and amplified signals to a signal transceiver.
It can be known from the foregoing embodiments of the present invention that, in the radio frequency front-end module, the mobile terminal, and the signal processing method provided in the present invention, a low-loss signal processing module is used to process a signal in a preset GSM frequency band, and the antenna switch is connected to the channel in the preset GSM frequency band, so as to control the signal received from the antenna to enter the low-loss signal processing module for processing, thereby reducing loss in the GSM frequency band, improving sensitivity of the signal in the GSM frequency band, and improving communication quality.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a radio frequency front end module according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a radio frequency front end module according to a second embodiment of the present invention;
fig. 3 is a schematic structural diagram of an rf front-end module including a duplexer pass according to a second embodiment of the present invention;
fig. 4 is a flowchart illustrating a signal processing method according to a third embodiment of the invention;
fig. 5 is a flowchart illustrating a signal processing method according to a fourth embodiment of the present invention.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The radio frequency front-end module in the embodiment of the invention can be applied to a mobile terminal, wherein the mobile terminal can comprise a mobile phone, a tablet computer, a camera, wearable equipment and the like.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a radio frequency front end module according to a first embodiment of the present invention, which can be applied to a mobile terminal, and the radio frequency front end module includes:
an antenna 10, an antenna switch 20, a low loss signal processing module 30 and a signal transceiver 40.
The antenna switch 20 is connected to the antenna 10 and the low-loss signal processing module 30, respectively.
The processor of the mobile terminal controls the antenna switch 20 to switch between different GSM frequency bands and signal transceiving states. GSM bands may include: GSM900, corresponding to 900MHz working frequency; GSM1800 with 1800MHz corresponding operating frequency; GSM-1900, corresponding to the working frequency of 1900MHz, etc.
In fig. 1, the antenna switch 20 controls the signal received by the antenna 10 to enter the low-loss signal processing module 30 by turning on the preset GSM frequency channel. The antenna 10 receives an incoming signal, namely rx (receive) signal. The preset GSM frequency channel may be a GSM900 channel, a GSM1800 channel, or another GSM frequency channel.
The low-loss signal processing module 30 is connected to the signal transceiver 40, and filters and amplifies the received signal and inputs the filtered and amplified signal to the signal transceiver 40.
In the embodiment of the invention, the low-loss signal processing module is used for processing the signal of the preset GSM frequency band, the antenna switch is connected with the channel of the preset GSM frequency band, and the signal received from the antenna is controlled to enter the low-loss signal processing module for processing, so that the loss of the GSM frequency band is reduced, the sensitivity of the signal of the GSM frequency band is improved, and the communication quality is improved.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a radio frequency front end module according to a second embodiment of the present invention, where the radio frequency front end module is different from the embodiment shown in fig. 1 in that:
the low-loss signal processing module 30 includes: a low noise amplifier 301 and a high selectivity filter 302.
One end of the high-selectivity wave filter 302 is connected to the antenna switch 20, the other end of the high-selectivity wave filter 302 is connected to one end of the low-noise amplifier 301, and the high-selectivity wave filter 302 is configured to filter a signal received from the antenna 10. The high selectivity filter 302 has good performance and can filter out unwanted signals and improve signal quality.
The other end of the low noise amplifier 301 is connected to the signal transceiver 40, and is configured to amplify the signal filtered by the high selectivity filter 302. The low noise amplifier 301 amplifies the signal and reduces noise, thereby improving signal quality.
In addition, the power consumption of the low noise amplifier 301 and the power consumption of the high selectivity filter 302 are both small, and the sum of the power consumption is smaller than that of the duplexer, so that the signal sensitivity of the GSM frequency band can be improved.
Further, the high selectivity filter 302 may be a SURFACE ACOUSTIC WAVE (SAW) filter, a BULK ACOUSTIC WAVE (BAW) filter, or a FILM BULK ACOUSTIC RESONATOR (FBAR) filter. SAW filters, BAW filters and FBAR filters are all low loss devices.
The low NOISE amplifier 301 includes all amplifiers with low NOISE, such as lna (low NOISE amplifier).
Further, the low-loss signal processing module 30 is disposed between the signal transceiver 40 and the antenna switch 20 and close to the antenna switch 20, and is relatively far from the signal transceiver 40, that is, between the signal transceiver 40 and the antenna switch 20 on the circuit board, the low-noise amplifier 301 and the high-selectivity filter 302 are disposed close to the antenna switch 20, so as to reduce the line loss.
The invention concept of the embodiment of the invention is based on that in each GSM frequency band of the mobile terminal, the Noise Figure (NF) between the antenna and the LNA has the greatest influence on the sensitivity of the communication signal, and the total NF needs to be reduced to improve the sensitivity of the signal. The total NF is the LOSS sum of the inherent NF of the LNA and other components, and the LOSS of the other components comprises antenna LOSS, LOSS of an antenna switch, LOSS of a duplexer or a filter and routing LOSS.
That is, the total NF is the LNA-specific NF + the other components LOSS.
Reducing the LOSS of any of the components can reduce the total NF.
Further, as shown in fig. 3, the rf front-end module further includes: a duplexer 50.
The duplexer 50 has one end connected to the antenna switch 20 and the other end connected to the signal transceiver 40.
The antenna switch 20 controls the incoming signal received by the antenna 10 to enter the duplexer 50 by turning on the signal transmission channel on which the duplexer 50 is located, and to be transmitted to the signal transceiver 40 through the duplexer 50, which may be B8.
It should be noted that the antenna switch 20 can only turn on one signal transmission channel at a time, so that the signal transmission channel where the duplexer 50 is located does not receive the signal from the antenna 10 while the signal transmission channels where the low-noise amplifier 301 and the high-selectivity filter 302 are turned on, and conversely, the signal transmission channels where the low-noise amplifier 301 and the high-selectivity filter 302 are located does not receive the signal from the antenna 10 while the signal transmission channel where the duplexer 50 is located is turned on.
In the embodiment of the invention, the antenna switch is connected with the preset GSM frequency band channel, the signal received from the antenna is controlled to enter the high-selectivity wave filter, the high-selectivity wave filter filters the signal of the preset GSM frequency band, the filtered signal is amplified by the low-noise amplifier, and the high-selectivity wave filter and the low-noise amplifier are both devices with smaller loss, so that the loss of the GSM frequency band can be reduced, the sensitivity of the GSM frequency band signal is improved, the call quality is improved, in addition, the high-selectivity wave filter and the low-noise amplifier are arranged close to the antenna switch, the line loss can be reduced, the sensitivity of the GSM frequency band signal is further improved, and the call quality is improved.
Referring to fig. 4, fig. 4 is a flowchart illustrating a signal processing method according to a third embodiment of the present invention, which can be applied to the rf front-end module shown in the embodiments of fig. 1 and fig. 2 to process signals, and the method includes:
the specific structure of the rf front-end module, as shown in fig. 1 and 2, may include: an antenna 10, an antenna switch 20, a low loss signal processing module 30 and a signal transceiver 40. Wherein the low-loss processing module 30 comprises: a low noise amplifier 301 and a highly selective wave filter 302. A low noise amplifier 301 and a highly selective wave filter 302 are disposed between the signal transceiver 40 and the antenna switch 20 and near the antenna switch 20.
S401, controlling an antenna switch to be connected with a preset GSM frequency channel so as to transmit a signal received by an antenna to a low-loss signal processing module;
the processor of the mobile terminal controls the antenna switch to switch on the preset GSM frequency channel, and the structure and the switching-on state of the antenna switch are shown in fig. 2.
S402, the low-loss signal processing module filters and amplifies the signal;
the low-loss signal processing module filters and amplifies the signal, the low-loss signal processing module has low loss, and the sensitivity of the GSM frequency band signal is good.
And S403, transmitting the filtered and amplified signal to a signal transceiver.
Details of this embodiment are not described in detail with reference to the foregoing description of the embodiment shown in fig. 1 to fig. 2, and are not repeated herein.
In the embodiment of the invention, the antenna switch is controlled to be connected with the preset GSM frequency band channel, the signal received by the antenna is transmitted to the low-loss signal processing module, the signal is filtered and amplified by the low-loss signal processing module and then transmitted to the signal transceiver, and the low-loss signal processing module can reduce the loss of the GSM frequency band, so that the sensitivity of the GSM frequency band signal is improved, and the communication quality is improved.
Referring to fig. 5, fig. 5 is a flowchart illustrating a signal processing method according to a fourth embodiment of the present invention, wherein the rf front-end module in the embodiments shown in fig. 1 and fig. 2 can be applied to process signals, and the difference between the rf front-end module in the embodiment shown in fig. 5 and the rf front-end module in the embodiment shown in fig. 4 is that the low-loss signal processing module includes a low-noise amplifier and a high-selectivity wave filter. One end of the high selectivity wave filter is connected with the antenna switch, the other end of the high selectivity wave filter is connected with one end of the low noise amplifier, and the high selectivity wave filter is used for filtering signals received from the antenna. And the other end of the low-noise amplifier is connected with the signal transceiver and is used for amplifying the signal filtered by the high-selectivity filter. The method comprises the following steps:
s501, controlling an antenna switch to be connected with a preset GSM frequency channel so as to transmit signals received by an antenna to a high-selectivity wave filter;
the processor of the mobile terminal controls the antenna switch to switch on the preset GSM frequency channel, and the structure and the switching-on state of the antenna switch are shown in fig. 2.
S502, the high selectivity wave filter filters the signal and then enters a low noise amplifier, and the low noise amplifier amplifies the signal filtered by the high selectivity wave filter;
note that the low noise amplifier and the high selectivity wave filter are provided near the antenna switch.
The high selectivity filter may be a surface acoustic wave filter, a bulk acoustic wave filter, or a thin film cavity acoustic resonator filter.
And S503, transmitting the filtered and amplified signal to a signal transceiver.
The method in the embodiment of the present invention has the same technical details as those in the embodiments shown in fig. 1, fig. 2, and fig. 3, and will not be described again here.
In the embodiment of the invention, the antenna switch is controlled to be connected with the preset GSM frequency band channel, the signal received by the antenna is transmitted to the low-loss signal processing module, the signal is filtered and amplified by the low-loss signal processing module and then transmitted to the signal transceiver, and the low-loss signal processing module can reduce the loss of the GSM frequency band, so that the sensitivity of the GSM frequency band signal is improved, and the communication quality is improved.
An embodiment of the present invention further provides a mobile terminal, where the mobile terminal includes the radio frequency front end module shown in fig. 1 to 3, and further includes hardware structures such as a processor, a memory, an input device, and an output device. The input device comprises a keyboard, a mouse, a voice input module and the like, and the output device comprises a screen and a loudspeaker.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In view of the above description of the rf front-end module, the mobile terminal and the signal processing method provided by the present invention, those skilled in the art may change the embodiments and the application ranges according to the idea of the embodiments of the present invention, and in summary, the content of the present specification should not be construed as limiting the present invention.
Claims (7)
1. A radio frequency front end module, comprising:
the antenna comprises an antenna, an antenna switch, a low-loss signal processing module and a signal transceiver;
the antenna switch is connected with the antenna and the low-loss signal processing module, and controls signals received by the antenna to enter the low-loss signal processing module by connecting a preset global system for mobile communication frequency band channel;
the low-loss signal processing module is connected with the signal transceiver, and inputs the received signals into the signal transceiver after filtering and amplifying the received signals;
the module still includes:
a duplexer;
one end of the duplexer is connected with the antenna switch, and the other end of the duplexer is connected with the signal transceiver;
the antenna switch controls the signal received by the antenna to enter the duplexer by switching on a signal transmission channel where the duplexer is positioned;
the low loss signal processing module includes:
a low noise amplifier and a high selectivity wave filter;
the sum of the power consumption values of the low noise amplifier and the high selectivity wave filter is smaller than that of the duplexer, and the sum is arranged between the signal transceiver and the antenna switch and close to the antenna switch;
one end of the high selectivity wave filter is connected with the antenna switch, and the other end of the high selectivity wave filter is connected with one end of the low noise amplifier and is used for filtering the received signal;
and the other end of the low-noise amplifier is connected with the signal transceiver and is used for amplifying the signal filtered by the high-selectivity filter.
2. The module of claim 1, wherein the high selectivity filter comprises:
surface acoustic wave filters, bulk acoustic wave filters or thin film cavity acoustic resonator filters.
3. A mobile terminal comprising the rf front-end module of any of claims 1 to 2.
4. A signal processing method, wherein a radio frequency front end module according to any one of claims 1 to 2 is applied to process a signal, the method comprising:
controlling an antenna switch to be connected with a preset global mobile communication system frequency band channel so as to transmit signals received by an antenna to a low-loss signal processing module;
the low-loss signal processing module filters and amplifies the signals;
and transmitting the filtered and amplified signals to a signal transceiver.
5. The method of claim 4, wherein the low-loss signal processing module comprises: a low noise amplifier and a high selectivity filter;
one end of the high selectivity wave filter is connected with the antenna switch, the other end of the high selectivity wave filter is connected with one end of the low noise amplifier, and the other end of the low noise amplifier is connected with the signal transceiver;
the low-loss signal processing module filters and amplifies the signal, and comprises:
the high selectivity wave filter carries out filtering processing on the signal;
and the low noise amplifier amplifies the signal filtered by the high selectivity wave filter.
6. The method according to claim 4 or 5,
the low noise amplifier and the high selectivity wave filter are disposed adjacent to the antenna switch between the signal transceiver and the antenna switch.
7. The method of claim 6, wherein the highly selective filter comprises:
surface acoustic wave filters, bulk acoustic wave filters or thin film cavity acoustic resonator filters.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710772662.4A CN107689812B (en) | 2017-08-31 | 2017-08-31 | Radio frequency front-end module, mobile terminal and signal processing method |
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| CN201710772662.4A CN107689812B (en) | 2017-08-31 | 2017-08-31 | Radio frequency front-end module, mobile terminal and signal processing method |
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| CN107689812B true CN107689812B (en) | 2020-09-25 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105871392A (en) * | 2015-10-26 | 2016-08-17 | 乐视移动智能信息技术（北京）有限公司 | Receiver and communication terminal |
| CN105897284A (en) * | 2015-10-26 | 2016-08-24 | 乐视移动智能信息技术（北京）有限公司 | Receiver and communication terminal |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050063409A (en) * | 2003-12-22 | 2005-06-28 | 자화전자 주식회사 | Quad band antenna switch module circuit |
| JP2007295327A (en) * | 2006-04-26 | 2007-11-08 | Hitachi Metals Ltd | High frequency circuit, high frequency component, and communication apparatus |
| CN102404882A (en) * | 2011-11-04 | 2012-04-04 | 中兴通讯股份有限公司 | Multi-mode radio frequency receiving and processing chip and multi-mode terminal |
| CN102510270A (en) * | 2011-11-04 | 2012-06-20 | 中兴通讯股份有限公司 | Duplexer, radio-frequency front module, multi-mode terminal and filtering method of duplexer |
| CN202309698U (en) * | 2011-11-04 | 2012-07-04 | 中兴通讯股份有限公司 | Filtering device, antenna switch module and dual-mode terminal |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105871392A (en) * | 2015-10-26 | 2016-08-17 | 乐视移动智能信息技术（北京）有限公司 | Receiver and communication terminal |
| CN105897284A (en) * | 2015-10-26 | 2016-08-24 | 乐视移动智能信息技术（北京）有限公司 | Receiver and communication terminal |
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Address after: Changan town in Guangdong province Dongguan 523860 usha Beach Road No. 18 Applicant after: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS Corp.,Ltd. Address before: Changan town in Guangdong province Dongguan 523860 usha Beach Road No. 18 Applicant before: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS Corp.,Ltd. |
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