CN101800566A - Radio-frequency front-end system - Google Patents
Radio-frequency front-end system Download PDFInfo
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- CN101800566A CN101800566A CN201010042616A CN201010042616A CN101800566A CN 101800566 A CN101800566 A CN 101800566A CN 201010042616 A CN201010042616 A CN 201010042616A CN 201010042616 A CN201010042616 A CN 201010042616A CN 101800566 A CN101800566 A CN 101800566A
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Abstract
The embodiment of the invention provides a radio-frequency front-end system for enhancing receiving sensitivity. The system comprises a single-pole n-throw switch, n numbered power amplifiers and n numbered band filters, wherein n is greater than or equal to 1; the n numbered power amplifiers are respectively arranged in n numbered transmission channels and are used for amplifying transmitted signals; the n numbered band filters are respectively arranged in n numbered receiving channels, and are used for letting through received signals conforming to the frequency band thereof and shielding signals received by other frequency bands; and the single-pole n-throw switch is connected with an antenna and is used for gating the transmission channels at which the n numbered power amplifiers positioned. Accordingly, the embodiment of the invention also provides a method for receiving and transmitting signals in the radio-frequency front-end system. Since the switch is only arranged in the transmission channel and the switch in the receiving channel is removed, the invention reduces the insertion loss of the receiving radio-frequency front-end and enhances the receiving sensitivity.
Description
Technical Field
The invention relates to the field of wireless communication, in particular to a radio frequency front-end system.
Background
Two-way communication requires a certain duplex mode of operation, i.e. reception and transmission are separated. The Duplex modes currently used in the communication field are mainly Frequency Division Duplex (FDD) and Time Division Duplex (TDD), which are common Duplex modes in various wireless systems. Correspondingly, there is a duplex technology combining two duplex modes, such as a GSM terminal, where the received and transmitted signals occupy different frequency bands, and the transmitted signal is transmitted with 3 more time slots than the received signal, which is called a frequency division and time division communication terminal.
In a frequency division and time division communication terminal, a single-pole double-throw switch (a single-pole double-throw switch for multi-band application) is generally adopted for a single frequency band, and a transmitting channel and a receiving channel are selected in a time division mode in time slots corresponding to transmitting and receiving respectively, so that the transmitting-receiving duplex switching is realized.
As shown in fig. 1, Transceiver is a Transceiver for communication, and comprises a power amplifier, a frequency band Filter (Filter) and a single-pole double-throw switch, wherein a common terminal of the single-pole double-throw switch is connected to an antenna, and a transmitting branch where the power amplifier is located and a receiving branch where the frequency band Filter is located are time-division gated through the single-pole double-throw switch, so that duplex switching between receiving and transmitting is realized.
Because the receiving branch needs to be connected in series with the single-pole double-throw switch, certain insertion loss is necessarily introduced, and sensitivity loss corresponding to the insertion loss is introduced. In the existing implementation scheme, a single-pole double-throw switch (a single-pole double-throw switch for multi-band application) is generally integrated in a power amplifier chip, and a contact is necessarily designed for a receiving branch, which brings extra cost.
Disclosure of Invention
The embodiment of the invention provides a radio frequency front-end system for improving receiving sensitivity, which comprises a single-pole n-throw switch, n power amplifiers and n frequency band filters, wherein n is more than or equal to 1; the n power amplifiers are respectively arranged in the n transmitting channels and are used for amplifying transmitted signals; the n frequency band filters are respectively arranged in the n receiving channels and are used for passing the received signals which accord with the own frequency band and shielding the signals received by other frequency bands; the single-pole n-throw switch is connected with the antenna and used for gating the transmitting channels where the n power amplifiers are located.
Accordingly, an embodiment of the present invention further provides a method for transceiving signals in a radio frequency front end system, wherein the radio frequency front end system includes a single-pole n-throw switch connected to an antenna for gating a transmit channel, the method including: and when the signal is received, all the single-pole n-throw switches are disconnected, and when the signal is transmitted, the single-pole n-throw switches gate the transmission channel corresponding to the frequency band of the transmission signal.
According to the technical scheme, the switch is only arranged in the transmitting channel, and the switch in the receiving channel is removed, so that the insertion loss of the front end of the receiving radio frequency is reduced, and the receiving sensitivity is improved.
Drawings
FIG. 1 is a block diagram of a prior art RF front-end system;
FIG. 2 is a first schematic structural diagram of a radio frequency front-end system according to an embodiment of the present invention;
FIG. 3 is a first flowchart illustrating a method for transceiving signals according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a radio frequency front-end system according to an embodiment of the present invention;
fig. 5 is a flowchart illustrating a method for transceiving signals according to a second embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and examples.
Fig. 2 is a structural diagram of an embodiment of a single communication band rf front end device according to the present invention, which includes a single-pole single-throw switch 201, a power amplifier 202, and a band filter 203; wherein,
in the transmitting channel, a single-pole single-throw switch 201 is connected with an antenna, the transmitting channel where the power amplifier 202 is located is gated through the single-pole single-throw switch 201, and a transmitting signal of a transceiver 204 is transmitted;
in the receive path, a band filter 203 is coupled to the antenna to pass the received signal to a transceiver 204.
Specifically, the operating states at the time of reception and transmission are as follows:
during receiving, the single-pole single-throw switch 201 is turned off, and signals received by the antenna only flow into a receiving channel;
when transmitting, the single-pole single-throw switch 201 is turned on, and the transmitted signal flows into the antenna through the power amplifier 202 in the transmitting channel and is transmitted due to the shielding property of the band filter 203 in the receiving channel to the transmitted signal.
It can be known from the above embodiments that the switch is only arranged in the transmitting channel, and the switch in the receiving channel is removed, so that the insertion loss of the front end of the receiving radio frequency is reduced, and the receiving sensitivity is improved.
As one skilled in the art can appreciate, other processing modules may be further disposed in the transmitting channel and the receiving channel, such as a digital-to-analog conversion module for converting a digital signal into an analog signal/converting an analog signal into a digital signal, a coding and decoding module for coding and decoding a signal, and the like. As an embodiment of the invention, the transceiver may implement the functionality of the further processing module. For the switch of the receiving channel and the transmitting channel, the transmitting channel and the receiving channel can be selected in a time-sharing way according to the time slots corresponding to the transmitting and the receiving.
Fig. 3 is a schematic flow chart of an embodiment of a single communication band signal transceiving method according to the present invention, in which the radio frequency front end apparatus shown in fig. 2 is adopted in the embodiment of the method, the radio frequency front end apparatus includes a single-pole single-throw switch 201, a power amplifier 202, and a band filter 203; in the transmitting channel, a single-pole single-throw switch 201 is connected with an antenna, the transmitting channel where the power amplifier 202 is located is gated through the single-pole single-throw switch 201, and a transmitting signal of a transceiver 204 is transmitted; in the receive path, a band filter 203 is coupled to the antenna to pass the received signal to a transceiver 204.
Step 301, whether a receiving time slot arrives or a transmitting time slot arrives, if the receiving time slot arrives, step 302 is executed, and if the transmitting time slot arrives, step 303 is executed;
the frequency division and time division communication terminal selects a transmitting channel and a receiving channel in a time division mode according to the corresponding time slots for transmitting and receiving.
In step 302, the single pole single throw switch 201 is turned off and the band filter 203 passes the received signal to the transceiver 204.
Step 303, the single-pole single-throw switch 201 is turned on, the power amplifier 202 in the transmitting channel amplifies the transmitted signal, the amplified signal passes through the antenna and is transmitted, and the mid-band filter 203 in the receiving channel shields the transmitted signal.
Fig. 4 is a structural diagram of an embodiment of a multi-communication-band rf front-end device of the present invention, which includes a single-pole multi-throw switch 401, a plurality of power amplifiers 4021, 4022 to 402n, and a plurality of band filters 4031, 4032 to 403 n; in this embodiment, n is greater than or equal to 2, and the plurality of power amplifiers are applied to the transmission channels of each frequency band corresponding to n frequency bands respectively; the plurality of band filters are applied to the reception channels of the respective frequency bands corresponding to the n frequency bands, respectively, wherein,
the receive channels of each band are directly connected to the antenna through a respective band filter,
each frequency band transmitting channel is connected to the antenna through the single-pole multi-throw switch 401, the transmitting channel where each power amplifier is located is gated through the single-pole multi-throw switch 401, and the transmitting signal of the transceiver 404 is transmitted out from the transmitting channel.
Specifically, when receiving and transmitting signals in the nth frequency band, where N is greater than or equal to 1 and less than or equal to N, the radio frequency front end device operates in the following states:
when receiving signals in the nth frequency band, the single-pole multi-throw switch 401 is completely switched off to isolate the transmitting channel, the receiving channel in the nth frequency band receives the signals, and the receiving channels in other frequency bands shield the received signals through the frequency band filters arranged in the receiving channels;
when a signal is transmitted in a certain nth frequency band, the single-pole multi-throw switch 401 gates a transmitting channel of the nth frequency band, and a frequency band filter is arranged in each receiving channel to shield the transmitting signal, so that the transmitting signal is transmitted through the corresponding transmitting channel of the nth frequency band.
It can be known from the above embodiments that the switch is only arranged in the transmitting channel, and the switch in the receiving channel is removed, so that the insertion loss of the front end of the receiving radio frequency is reduced, and the receiving sensitivity is improved.
As one skilled in the art can appreciate, other processing modules may be further disposed in the transmitting channel and the receiving channel, such as a digital-to-analog conversion module for converting a digital signal into an analog signal/converting an analog signal into a digital signal, a coding and decoding module for coding and decoding a signal, and the like. As an embodiment of the invention, the transceiver may implement the functionality of the further processing module. For the switch of the receiving channel and the transmitting channel, the transmitting channel and the receiving channel can be selected in a time-sharing way according to the time slots corresponding to the transmitting and the receiving.
Fig. 5 is a schematic flow chart of an embodiment of a method for transmitting and receiving signals in multiple communication frequency bands according to the present invention, in which the radio frequency front end apparatus shown in fig. 4 is adopted in the embodiment of the method, the radio frequency front end apparatus includes a single-pole multi-throw switch 401, a plurality of power amplifiers 4021, 4022 to 402n, and a plurality of band filters 4031, 4032 to 403 n; in this embodiment, n is greater than or equal to 2, and the plurality of power amplifiers are applied to the transmission channels of each frequency band corresponding to n frequency bands respectively; the plurality of band filters are applied to the receiving channels of each frequency band corresponding to the n frequency bands, respectively, wherein the receiving channels of each frequency band are directly connected to the antenna through each band filter; each frequency band transmitting channel is connected to the antenna through the single-pole multi-throw switch 401, the transmitting channel where each power amplifier is located is gated through the single-pole multi-throw switch 401, and the transmitting signal of the transceiver 404 is transmitted out from the transmitting channel. In this embodiment, receiving or transmitting a signal in an nth frequency band, where N is greater than or equal to 1 and less than or equal to N specifically includes:
the frequency division and time division communication terminal selects a transmitting channel and a receiving channel in a time division mode according to the corresponding time slots for transmitting and receiving.
The objects, technical solutions and advantages of the present invention have been described in further detail with reference to the preferred embodiments, it should be understood that the above description is only illustrative of the preferred embodiments of the present invention, and should not be construed as limiting the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A radio frequency front-end system is characterized by comprising a single-pole n-throw switch, n power amplifiers and n frequency band filters, wherein n is greater than or equal to 1;
the n power amplifiers are respectively arranged in the n transmitting channels and are used for amplifying transmitted signals;
the n frequency band filters are respectively arranged in the n receiving channels and are used for passing the received signals which accord with the own frequency band and shielding the signals received by other frequency bands;
the single-pole n-throw switch is connected with the antenna and used for gating the transmitting channels where the n power amplifiers are located.
2. The radio frequency front-end system of claim 1, wherein when n equals 1, the single-pole n-throw switch is a single-pole single-throw switch,
when receiving signals, the single-pole single-throw switch is in a disconnected state, and the frequency band filter is used for transmitting the signals which are received by the antenna and transmitted to the receiving channel to the transceiver;
when transmitting signals, the single-pole single-throw switch is in a switch-on state, the band filter is used for shielding the transmitted signals, and the power amplifier is used for amplifying the signals in the transmitting channel and sending the signals to the antenna so as to be transmitted through the antenna.
3. The radio frequency front-end system of claim 1, wherein n is greater than 1;
when a signal is received in a frequency band, all the single-pole n-throw switches are switched off to isolate a transmitting channel, a frequency band filter in the receiving channel of the frequency band is used for transmitting the received signal to a transceiver, and frequency band filters in receiving channels of other frequency bands shield the received signal;
when a signal is transmitted in a frequency band, the single-pole n-throw switch gates a transmission channel of the frequency band, and a power amplifier in the transmission channel of the frequency band is used for amplifying the transmitted signal; the n band filters are used for shielding the transmitted signals.
4. A method for transceiving signals in a radio frequency front end system, the radio frequency front end system comprising a single-pole n-throw switch,
the single-pole n-throw switch is connected with an antenna and used for gating a transmitting channel, and the method comprises the following steps:
when receiving signals, all the single-pole n-throw switches are switched off,
when transmitting signals, the single-pole n-throw switch gates a transmitting channel corresponding to a transmitting signal frequency band.
5. The method of claim 4, wherein when n equals 1, the single-pole, n-throw switch is a single-pole, single-throw switch, and the radio frequency front-end system further comprises a power amplifier, a band filter;
the power amplifier is arranged in the transmitting channel and used for amplifying the transmitted signal;
the band filter is arranged in the receiving channel and is used for passing the received signals conforming to the frequency band of the band filter and shielding the signals received by other frequency bands;
then, when receiving the signal, specifically: the single-pole single-throw switch is switched off, and the frequency band filter transmits the received signal to the transceiver;
when the signal is transmitted, specifically, the single-pole single-throw switch is switched on, a power amplifier in a transmitting channel amplifies the transmitted signal, the amplified signal passes through an antenna and is transmitted out, and a middle frequency band filter in a receiving channel shields the transmitted signal.
6. The method of claim 4, wherein when n is greater than 1, the RF front-end system further comprises n power amplifiers, n band filters;
the n power amplifiers are respectively applied to the transmitting channels of each frequency band corresponding to the n frequency bands; the n band filters are respectively applied to the receiving channels of each frequency band corresponding to the n frequency bands;
when receiving a frequency band signal, specifically: the single-pole n-throw switch is completely switched off, a frequency band filter in a receiving channel of the frequency band transmits a received signal to a transceiver, and frequency band filters in receiving channels of other frequency bands shield the received signal;
when a frequency band signal is transmitted, the method specifically comprises the following steps: the single-pole n-throw switch gates the transmitting channel of the frequency band, a power amplifier in the transmitting channel of the frequency band amplifies the transmitted signal and transmits the amplified signal through an antenna, and a frequency band filter in each receiving channel shields the transmitted signal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010042616.7A CN101800566B (en) | 2010-01-06 | 2010-01-06 | A kind of radio-frequency front-end system |
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| CN201010042616.7A CN101800566B (en) | 2010-01-06 | 2010-01-06 | A kind of radio-frequency front-end system |
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| CN101800566A true CN101800566A (en) | 2010-08-11 |
| CN101800566B CN101800566B (en) | 2015-09-09 |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102938080A (en) * | 2011-11-10 | 2013-02-20 | 厦门英诺尔电子科技股份有限公司 | Radio frequency (RF) information channel gating circuit of radio frequency identification (RFID) reader-writer |
| WO2013185666A1 (en) * | 2012-07-11 | 2013-12-19 | 中兴通讯股份有限公司 | Radio-frequency front-end circuit of multiband terminal and multiband terminal |
| CN103812469A (en) * | 2012-11-08 | 2014-05-21 | 台湾积体电路制造股份有限公司 | Integrated transmitter and receiver front end module, transceiver, and related method |
| CN105940760A (en) * | 2015-01-07 | 2016-09-14 | 华为技术有限公司 | RF front-end system, terminal equipment and base station |
| CN107371279A (en) * | 2016-05-12 | 2017-11-21 | 北京佰才邦技术有限公司 | A kind of base station radio-frequency device |
| CN108451487A (en) * | 2018-03-26 | 2018-08-28 | 深圳市资福医疗技术有限公司 | A kind of device ensuring capsule endoscope data transmit-receive stability |
| CN110113059A (en) * | 2019-04-12 | 2019-08-09 | 博微太赫兹信息科技有限公司 | A kind of device and method reducing ADC sampling rate |
| CN110958027A (en) * | 2019-12-31 | 2020-04-03 | 深圳市广和通无线股份有限公司 | Radio frequency front-end device and radio frequency communication system |
| CN111245453A (en) * | 2020-01-16 | 2020-06-05 | 惠州Tcl移动通信有限公司 | Radio frequency structure and mobile terminal |
| US11431356B2 (en) | 2018-07-23 | 2022-08-30 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Radio frequency system, method for controlling antenna switching, and related products |
| WO2024067028A1 (en) * | 2022-09-28 | 2024-04-04 | 荣耀终端有限公司 | Radio frequency module, radio frequency system, and electronic device |
| CN119210498A (en) * | 2024-10-17 | 2024-12-27 | 荣耀终端有限公司 | Radio frequency module and electronic equipment |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102938080A (en) * | 2011-11-10 | 2013-02-20 | 厦门英诺尔电子科技股份有限公司 | Radio frequency (RF) information channel gating circuit of radio frequency identification (RFID) reader-writer |
| WO2013185666A1 (en) * | 2012-07-11 | 2013-12-19 | 中兴通讯股份有限公司 | Radio-frequency front-end circuit of multiband terminal and multiband terminal |
| US9473196B2 (en) | 2012-07-11 | 2016-10-18 | Zte Corporation | Radio-frequency front-end circuit of multiband terminal and multiband terminal |
| CN103812469B (en) * | 2012-11-08 | 2017-03-01 | 台湾积体电路制造股份有限公司 | The front-end module of integrated emitter and receptor, transceiver and associated method |
| CN103812469A (en) * | 2012-11-08 | 2014-05-21 | 台湾积体电路制造股份有限公司 | Integrated transmitter and receiver front end module, transceiver, and related method |
| CN105940760B (en) * | 2015-01-07 | 2019-03-26 | 华为技术有限公司 | Radio-frequency front-end system, terminal device and base station |
| CN105940760A (en) * | 2015-01-07 | 2016-09-14 | 华为技术有限公司 | RF front-end system, terminal equipment and base station |
| CN107371279A (en) * | 2016-05-12 | 2017-11-21 | 北京佰才邦技术有限公司 | A kind of base station radio-frequency device |
| CN108451487A (en) * | 2018-03-26 | 2018-08-28 | 深圳市资福医疗技术有限公司 | A kind of device ensuring capsule endoscope data transmit-receive stability |
| US11431356B2 (en) | 2018-07-23 | 2022-08-30 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Radio frequency system, method for controlling antenna switching, and related products |
| CN110113059A (en) * | 2019-04-12 | 2019-08-09 | 博微太赫兹信息科技有限公司 | A kind of device and method reducing ADC sampling rate |
| CN110958027A (en) * | 2019-12-31 | 2020-04-03 | 深圳市广和通无线股份有限公司 | Radio frequency front-end device and radio frequency communication system |
| CN110958027B (en) * | 2019-12-31 | 2022-03-15 | 深圳市广和通无线股份有限公司 | Radio frequency front-end device and radio frequency communication system |
| CN111245453A (en) * | 2020-01-16 | 2020-06-05 | 惠州Tcl移动通信有限公司 | Radio frequency structure and mobile terminal |
| WO2024067028A1 (en) * | 2022-09-28 | 2024-04-04 | 荣耀终端有限公司 | Radio frequency module, radio frequency system, and electronic device |
| CN119210498A (en) * | 2024-10-17 | 2024-12-27 | 荣耀终端有限公司 | Radio frequency module and electronic equipment |
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| CN101800566B (en) | 2015-09-09 |
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Effective date of registration: 20171108 Address after: Metro Songshan Lake high tech Industrial Development Zone, Guangdong Province, Dongguan City Road 523808 No. 2 South Factory (1) project B2 -5 production workshop Patentee after: HUAWEI terminal (Dongguan) Co., Ltd. Address before: 518129 Longgang District, Guangdong, Bantian HUAWEI base B District, building 2, building No. Patentee before: Huawei Device Co., Ltd. |
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Address after: 523808 Southern Factory Building (Phase I) Project B2 Production Plant-5, New Town Avenue, Songshan Lake High-tech Industrial Development Zone, Dongguan City, Guangdong Province Patentee after: Huawei Device Co., Ltd. Address before: 523808 Southern Factory Building (Phase I) Project B2 Production Plant-5, New Town Avenue, Songshan Lake High-tech Industrial Development Zone, Dongguan City, Guangdong Province Patentee before: HUAWEI terminal (Dongguan) Co., Ltd. |