CN204615820U - Radio-frequency (RF) transmit-receive circuit and terminal - Google Patents
Radio-frequency (RF) transmit-receive circuit and terminal Download PDFInfo
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- CN204615820U CN204615820U CN201520296032.0U CN201520296032U CN204615820U CN 204615820 U CN204615820 U CN 204615820U CN 201520296032 U CN201520296032 U CN 201520296032U CN 204615820 U CN204615820 U CN 204615820U
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Abstract
The utility model provides a kind of radio-frequency (RF) transmit-receive circuit and terminal.Radio-frequency (RF) transmit-receive circuit of the present utility model comprises radio-frequency (RF) transceiver, the first radio frequency amplifier, the first filter, multimode switch, the second filter and antenna; Radio-frequency (RF) transceiver, the first radio frequency amplifier, the first filter, multimode switch and antenna connect successively; Radio-frequency (RF) transceiver is also connected with multimode switch by the second filter; Antenna is used for the first radiofrequency signal to be sent to the second filter by multimode switch; Second filter is used for the first radiofrequency signal to carry out filtering, obtains filtered first radiofrequency signal; Radio-frequency (RF) transceiver is used for carrying out demodulation to filtered first radiofrequency signal.The utility model can reduce signal attenuation, improves signal strength signal intensity.
Description
Technical field
The utility model embodiment relates to the communication technology, particularly relates to a kind of radio-frequency (RF) transmit-receive circuit and terminal.
Background technology
The demand that user increases substantially for traffic carrying capacity, makes to have more high spectrum utilization, faster transmission rate and can forth generation (Forth Generation the is called for short 4G) communication technology of capacity of deal with data be implemented as early as possible more greatly.On the basis of conventional communication techniques, normally carry out evolution due to the new communication technology to develop, and new communication technology extensive use also needs the regular hour, therefore, for ensureing the continuity of customer service, the communication technology that the radio-frequency (RF) transmit-receive circuit of terminal can support this new mostly simultaneously and conventional communication techniques.For 4G terminal, as supported timesharing Long Term Evolution (Time Division Long TermEvolution, be called for short TD-LTE) terminal of the communication technology, the second generation (SecondGeneration in this way can be supported again, be called for short 2G) or the third generation (Third Generation is called for short 3G) conventional communication techniques.
Fig. 1 is a kind of structural representation of radio-frequency (RF) transmit-receive circuit.As shown in Figure 1, this radio-frequency (RF) transmit-receive circuit can comprise radio-frequency (RF) transceiver 101, first radio frequency amplifier 102, first filter 103, multimode switch 104, second filter 105 and antenna 106.Wherein, radio-frequency (RF) transceiver 101, first radio frequency amplifier 102, first filter 103, multimode switch 104 connect successively, and radio-frequency (RF) transceiver 101 is also connected with the second filter with the first radio frequency amplifier 102.This radiofrequency signal can be sent to multimode switch 104 by antenna 106, and by multimode switch 104 by this radio signal transmission to the first filter 103.After first filter carries out the first filtering to the radiofrequency signal received, filtered signal is sent to the first radio frequency amplifier 102, transfers to the second filter 105 by the receiving path of the first radio frequency amplifier 102.Second filter 105 transfers to radio-frequency (RF) transceiver 101 after again carrying out the second filtering to the first filtered signal, carries out demodulation to make radio-frequency (RF) transceiver 101 according to the second filtered signal.
But due in this radio-frequency (RF) transmit-receive circuit, for the radiofrequency signal received, through multiple module, just need arrive radio-frequency (RF) transceiver, make the decay of signal in radio-frequency (RF) transmit-receive circuit serious, signal strength signal intensity is more weak.
Utility model content
The utility model provides a kind of radio-frequency (RF) transmit-receive circuit and terminal, to reduce the decay of signal in radio-frequency (RF) transmit-receive circuit, improves signal strength signal intensity.
The utility model provides a kind of radio-frequency (RF) transmit-receive circuit, comprising: radio-frequency (RF) transceiver, the first radio frequency amplifier, the first filter, multimode switch, the second filter and antenna;
Wherein, described radio-frequency (RF) transceiver, described first radio frequency amplifier, described first filter, described multimode switch and antenna connect successively; Described radio-frequency (RF) transceiver is also connected with described multimode switch by described second filter;
Described antenna, for being sent to described second filter by the first radiofrequency signal by described multimode switch;
Described second filter, for described first radiofrequency signal is carried out filtering, obtains this first radiofrequency signal of greening;
Described radio-frequency (RF) transceiver, for carrying out demodulation to described filtered described first radiofrequency signal.
In a kind of radio-frequency (RF) transmit-receive circuit of the present utility model, described first radiofrequency signal is third generation 3G or forth generation 4G radiofrequency signal.
A kind of radio-frequency (RF) transmit-receive circuit of the present utility model also comprises: the second radio frequency amplifier;
Described first filter is also connected with described antenna by described second radio frequency amplifier; Described second filter is also connected with described antenna by described second radio frequency amplifier;
Described antenna, also for the second radiofrequency signal is sent to described second radio frequency amplifier;
Described second radio frequency amplifier, is sent to described second filter for the receiving path by described second radio frequency amplifier by described second radiofrequency signal.
In a kind of radio-frequency (RF) transmit-receive circuit of the present utility model, described second radiofrequency signal is second generation 2G radiofrequency signal.
In a kind of radio-frequency (RF) transmit-receive circuit of the present utility model, described first filter is surface acoustic wave SAW filter;
Described second filter is difference filter; Described difference filter comprises: band pass filter and difference channel;
Wherein, described band pass filter is connected with described difference channel;
Described second filter is connected with described multimode switch by described band pass filter, and described second filter is connected with described radio-frequency (RF) transceiver by described difference channel.
The utility model also provides a kind of terminal, comprising: baseband circuit and any one radio-frequency (RF) transmit-receive circuit above-mentioned; Wherein, described baseband circuit is connected with described radio-frequency (RF) transmit-receive circuit.
Radio-frequency (RF) transmit-receive circuit of the present utility model and terminal, by antenna, the first radiofrequency signal is sent to the second filter by multimode switch, after the signal sent by multimode switch by the second filter carries out filtering, be sent to radio-frequency (RF) transceiver, then by radio-frequency (RF) transceiver, demodulation is carried out to the filtered signal that this second filter sends, decrease the decay of signal in radio-frequency (RF) transmit-receive circuit, improve signal strength signal intensity.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of radio-frequency (RF) transmit-receive circuit;
The structural representation of the radio-frequency (RF) transmit-receive circuit that Fig. 2 provides for the utility model embodiment one;
The structural representation of the radio-frequency (RF) transmit-receive circuit that Fig. 3 provides for the utility model embodiment two;
The structural representation of the terminal that Fig. 4 provides for the utility model embodiment three.
Embodiment
Embodiment one
The utility model embodiment one provides radio-frequency (RF) transmit-receive circuit.The structural representation of the radio-frequency (RF) transmit-receive circuit that Fig. 2 provides for the utility model embodiment one.As shown in Figure 2, radio-frequency (RF) transmit-receive circuit can comprise: radio-frequency (RF) transceiver 201, first radio frequency amplifier 202, first filter 203, multimode switch 204, second filter 205 and antenna 206.
Wherein, radio-frequency (RF) transceiver 201, first radio frequency amplifier 202, first filter 203, multimode switch 204 and antenna 206 connect successively.Radio-frequency (RF) transceiver 201 is also connected with multimode switch 204 by the second filter 205.
Antenna 206, for being sent to the second filter 205 by the first radiofrequency signal by multimode switch 204.
Second filter 205, after the signal for being sent by multimode switch 204 carries out filtering, is sent to radio-frequency (RF) transceiver 201.
Radio-frequency (RF) transceiver 201, carries out demodulation for this filtered signal sent the second filter 204.
Particularly, multimode switch 204 can comprise should the variable connector of radiofrequency signal of different frequency range supported of radio-frequency (RF) transmit-receive circuit.The radiofrequency signal that in this different frequency range that this first radiofrequency signal that antenna 206 receives can be supported for this radio-frequency (RF) transmit-receive circuit, any frequency range is corresponding.This first radiofrequency signal is sent to the second filter 205 by the path of this first radiofrequency signal corresponding frequency band in multimode switch 204 by antenna 206.
Second filter 205 can for presetting filter corresponding to frequency range.Second 205 pairs, filter multimode switch 204 send this first radiofrequency signal carry out filtering, can be by this default frequency range in this first radiofrequency signal beyond unwanted signal and interference signal filtering, obtain this first radiofrequency signal filtered.Radio-frequency (RF) transceiver 201 can comprise modulation /demodulation module, carries out demodulation by this modulation /demodulation module to this this first radiofrequency signal filtered.Signal after this demodulation also can be sent the baseband circuit be connected with this radio-frequency (RF) transmit-receive circuit by radio-frequency (RF) transceiver 201.
Radio-frequency (RF) transceiver 201 also can receive the radiofrequency signal to be sent that baseband circuit sends, and modulates, and be sent to radio frequency amplifier 202 to this radiofrequency signal to be sent.Radio frequency amplifier 202 can be power amplifier, and radio frequency amplifier 202 amplifies this radiofrequency signal to be sent after modulation, and is sent to the first filter 203.The target signal filter that first filter 203 will be preset in radiofrequency signal to be sent for this after this modulation outside frequency range, the radiofrequency signal that other frequency ranges supported to prevent this radio-frequency (RF) transmit-receive circuit are corresponding, as the interference of Wireless Fidelity (WIreless-Fidelity is called for short WiFi) signal.The filtered signal of first filter 203 is sent to antenna 207 by the path that this default frequency range in multimode switch 204 is corresponding, is sent by this antenna 207.
Radio-frequency (RF) transmit-receive circuit of the present utility model, by antenna, the first radiofrequency signal is sent to the second filter by multimode switch, after the signal sent by multimode switch by the second filter carries out filtering, be sent to radio-frequency (RF) transceiver, then by radio-frequency (RF) transceiver, demodulation is carried out to the filtered signal that this second filter sends, decrease the decay of signal in radio-frequency (RF) transmit-receive circuit, improve signal strength signal intensity.
Due to this radio-frequency (RF) transmit-receive circuit, decrease radiofrequency signal that antenna receives to the transmission of radio-frequency (RF) transceiver, simplify the structure of the receiving circuit in radio-frequency (RF) transmit-receive circuit.
Embodiment two
The utility model embodiment two also provides a kind of radio-frequency (RF) transmit-receive circuit.The radio-frequency (RF) transmit-receive circuit of this embodiment two, on the basis of above-described embodiment one, this first radiofrequency signal can be 3G or 4G radiofrequency signal.
Optionally, this antenna 206 can be, when this first radiofrequency signal received is 3G or 4G radiofrequency signal, by tunnel to the second filter 205 of this first radiofrequency signal corresponding frequency band in multimode switch 204.
Corresponding, when the radiofrequency signal to be sent that this baseband circuit that this radio-frequency (RF) transceiver 201 receives sends is 3G or 4G radiofrequency signal, radiofrequency signal to be sent after modulation is sent to radio frequency amplifier 202 by this radio-frequency (RF) transceiver 201, by radio frequency amplifier 202, this radiofrequency signal to be sent after modulation is amplified, and be sent to the first filter 203.The filtered signal of first filter 203 is sent to antenna 207 by the path presetting frequency range corresponding in multimode switch 204, is then sent by this antenna 207.That is, this first radio frequency amplifier 202 can be amplify 3G or 4G radiofrequency signal.
If this first radiofrequency signal is 4G radiofrequency signal.This first radiofrequency signal can be time-division Long Term Evolution (Time Division-Long Term Evolution is called for short TD-LTE) radiofrequency signal.Frequency range corresponding to this first radiofrequency signal can be any one in B39, B40 and B41.
First filter 204 and this second filter 205 can for presetting the filter of frequency range, and this default frequency range can be frequency range corresponding to this first radiofrequency signal.
This embodiment two also provides a kind of radio-frequency (RF) transmit-receive circuit.The structural representation of the radio-frequency (RF) transmit-receive circuit that Fig. 3 provides for the utility model embodiment two.As shown in Figure 3, this radio-frequency (RF) transmit-receive circuit also comprises: the second radio frequency amplifier 301.
First filter 203 is also connected with antenna 206 by the second radio frequency amplifier 301; Second filter 205 is also connected with antenna 206 by the second radio frequency amplifier 301.
Antenna 206, also for the second radiofrequency signal is sent to the second radio frequency amplifier 301.
Second radio frequency amplifier 301, is sent to the second filter 205 for the receiving path by the second radio frequency amplifier 301 by this second radiofrequency signal.
Optionally, this second radiofrequency signal can be 2G radiofrequency signal.
Optionally, this antenna 206 can be when this second radiofrequency signal received is 2G radiofrequency signal, by the receiving path of the second radio frequency amplifier 301 by this second radio signal transmission to the second filter 205.
Corresponding, when this radiofrequency signal to be sent that the baseband circuit that this radio-frequency (RF) transceiver 201 receives sends is 2G radiofrequency signal, this radiofrequency signal to be sent after modulation can be sent to radio frequency amplifier 202 by this radio-frequency (RF) transceiver 201, transfers to the first filter 203 by the receiving path of radio frequency amplifier 202.This radiofrequency signal to be sent filtered is sent to the second radio frequency amplifier 301 by the first filter 203 again, is amplified, and be sent to antenna 206 by the second radio frequency amplifier 301 to this radiofrequency signal to be sent filtered.If this radiofrequency signal to be sent is 2G radiofrequency signal, the first radio frequency amplifier 202 is receiving, and after this radiofrequency signal to be sent after the modulation of this radio-frequency (RF) transceiver 201, does not carry out amplifieroperation, but carries out the transmission of signal by receiving path.That is, this second radio frequency amplifier 202 can be amplify 2G radiofrequency signal.
Optionally, the first filter 203 is surface acoustic wave (Surface Acoustic Wave is called for short SAW) filter.
Second filter 205 is difference filter; This difference filter comprises: band pass filter and difference channel.Wherein, this band pass filter is connected with difference channel; Second filter 205 can be connected with multimode switch 204 by band pass filter, and the second filter 205 is connected with radio-frequency (RF) transceiver 201 by difference channel.
The radio-frequency (RF) transmit-receive circuit that the utility model embodiment two provides, on the basis of above-described embodiment one, can provide the radio-frequency (RF) transmit-receive circuit of multiple different radio frequency signal, reduces the decay of the Received signal strength in different radio frequency transmission circuit, improves signal strength signal intensity.
Embodiment three
Embodiment three of the present utility model also provides a kind of terminal.The structural representation of the terminal that Fig. 4 provides for the utility model embodiment three.As shown in Figure 4, this terminal 400 can comprise baseband circuit 401 and radio-frequency (RF) transmit-receive circuit 402.Wherein, baseband circuit 401 is connected with radio-frequency (RF) transmit-receive circuit 402.
This radio-frequency (RF) transmit-receive circuit 402 can be arbitrary described radio-frequency (RF) transmit-receive circuit in above-described embodiment one or embodiment two.
This radio-frequency (RF) transmit-receive circuit 402 can be TD-LTE radio-frequency (RF) transmit-receive circuit, and this terminal 400 can be TD-LTE terminal.
The terminal that the utility model embodiment three provides, can comprise arbitrary described radio-frequency (RF) transmit-receive circuit in above-described embodiment one or embodiment two, can reduce the signal attenuation of received RF signal in radio-frequency (RF) transmit-receive circuit, improve signal strength signal intensity.
Last it is noted that above each embodiment is only in order to illustrate the technical solution of the utility model, be not intended to limit; Although be described in detail the utility model with reference to foregoing embodiments, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of each embodiment technical scheme of the utility model.
Claims (6)
1. a radio-frequency (RF) transmit-receive circuit, is characterized in that, comprising: radio-frequency (RF) transceiver, the first radio frequency amplifier, the first filter, multimode switch, the second filter and antenna;
Wherein, described radio-frequency (RF) transceiver, described first radio frequency amplifier, described first filter, described multimode switch and antenna connect successively; Described radio-frequency (RF) transceiver is also connected with described multimode switch by described second filter;
Described antenna, for being sent to described second filter by the first radiofrequency signal by described multimode switch;
Described second filter, for described first radiofrequency signal is carried out filtering, obtains filtered described first radiofrequency signal;
Described radio-frequency (RF) transceiver, for carrying out demodulation to described filtered described first radiofrequency signal.
2. radio-frequency (RF) transmit-receive circuit according to claim 1, is characterized in that, described first radiofrequency signal is third generation 3G or forth generation 4G radiofrequency signal.
3. radio-frequency (RF) transmit-receive circuit according to claim 1, is characterized in that, described radio-frequency (RF) transmit-receive circuit also comprises: the second radio frequency amplifier;
Described first filter is also connected with described antenna by described second radio frequency amplifier; Described second filter is also connected with described antenna by described second radio frequency amplifier;
Described antenna, also for the second radiofrequency signal is sent to described second radio frequency amplifier;
Described second radio frequency amplifier, is sent to described second filter for the receiving path by described second radio frequency amplifier by described second radiofrequency signal.
4. radio-frequency (RF) transmit-receive circuit according to claim 3, is characterized in that, described second radiofrequency signal is second generation 2G radiofrequency signal.
5. the radio-frequency (RF) transmit-receive circuit according to any one of claim 1-4, is characterized in that,
Described first filter is surface acoustic wave SAW filter;
Described second filter is difference filter; Described difference filter comprises: band pass filter and difference channel;
Wherein, described band pass filter is connected with described difference channel;
Described second filter is connected with described multimode switch by described band pass filter, and described second filter is connected with described radio-frequency (RF) transceiver by described difference channel.
6. a terminal, is characterized in that, comprising: baseband circuit and the radio-frequency (RF) transmit-receive circuit according to any one of the claims 1-5; Wherein, described baseband circuit is connected with described radio-frequency (RF) transmit-receive circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520296032.0U CN204615820U (en) | 2015-05-08 | 2015-05-08 | Radio-frequency (RF) transmit-receive circuit and terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520296032.0U CN204615820U (en) | 2015-05-08 | 2015-05-08 | Radio-frequency (RF) transmit-receive circuit and terminal |
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| Publication Number | Publication Date |
|---|---|
| CN204615820U true CN204615820U (en) | 2015-09-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520296032.0U Expired - Fee Related CN204615820U (en) | 2015-05-08 | 2015-05-08 | Radio-frequency (RF) transmit-receive circuit and terminal |
Country Status (1)
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| CN (1) | CN204615820U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105741587A (en) * | 2016-03-24 | 2016-07-06 | 苏州玄禾物联网科技有限公司 | Internet of Things intelligent navigation system based on radio-frequency identification |
| CN106330213A (en) * | 2016-09-18 | 2017-01-11 | 深圳铂睿智恒科技有限公司 | Radio frequency device enhancing sensitivity |
| CN108281754A (en) * | 2017-01-05 | 2018-07-13 | 和硕联合科技股份有限公司 | Multi-antenna device |
| CN109361409A (en) * | 2018-12-05 | 2019-02-19 | 京信通信系统（中国）有限公司 | A kind of radio frequency system of effective optimization noise coefficient |
| CN112491434A (en) * | 2019-08-20 | 2021-03-12 | 合肥杰发科技有限公司 | Radio frequency front-end circuit, radio frequency signal receiving method, communication method and communication equipment |
| CN114513222A (en) * | 2022-01-21 | 2022-05-17 | 维沃移动通信有限公司 | Radio frequency circuit control method and device, electronic equipment and radio frequency circuit |
-
2015
- 2015-05-08 CN CN201520296032.0U patent/CN204615820U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105741587A (en) * | 2016-03-24 | 2016-07-06 | 苏州玄禾物联网科技有限公司 | Internet of Things intelligent navigation system based on radio-frequency identification |
| CN106330213A (en) * | 2016-09-18 | 2017-01-11 | 深圳铂睿智恒科技有限公司 | Radio frequency device enhancing sensitivity |
| CN108281754A (en) * | 2017-01-05 | 2018-07-13 | 和硕联合科技股份有限公司 | Multi-antenna device |
| CN108281754B (en) * | 2017-01-05 | 2020-01-10 | 和硕联合科技股份有限公司 | Multi-antenna device |
| CN109361409A (en) * | 2018-12-05 | 2019-02-19 | 京信通信系统（中国）有限公司 | A kind of radio frequency system of effective optimization noise coefficient |
| CN112491434A (en) * | 2019-08-20 | 2021-03-12 | 合肥杰发科技有限公司 | Radio frequency front-end circuit, radio frequency signal receiving method, communication method and communication equipment |
| CN114513222A (en) * | 2022-01-21 | 2022-05-17 | 维沃移动通信有限公司 | Radio frequency circuit control method and device, electronic equipment and radio frequency circuit |
| CN114513222B (en) * | 2022-01-21 | 2024-05-24 | 维沃移动通信有限公司 | Radio frequency circuit control method and device, electronic equipment and radio frequency circuit |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150902 Termination date: 20200508 |