CN103546189B - Radio-frequency (RF) front-end circuit and system - Google Patents
Radio-frequency (RF) front-end circuit and system Download PDFInfo
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- CN103546189B CN103546189B CN201310572197.1A CN201310572197A CN103546189B CN 103546189 B CN103546189 B CN 103546189B CN 201310572197 A CN201310572197 A CN 201310572197A CN 103546189 B CN103546189 B CN 103546189B
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- diverter switch
- frequency
- power amplifier
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Abstract
The invention discloses a kind of radio-frequency (RF) front-end circuit and system, comprising: diverter switch; The attenuator be connected with diverter switch respectively and filter; The power amplifier device be connected with attenuator; The transmitting antenna be connected with power amplifier device; The low noise amplifier be connected with filter; The reception antenna be connected with low noise amplifier.Adopt circuit of the present invention and system, to launch for control antenna without the need to arranging a diverter switch or to receive radio frequency signal, therefore can eliminate noise and unnecessary decay that this diverter switch introduces, thus improve the communication quality of radio communication both sides.
Description
Technical field
The present invention relates to wireless communication technology field, particularly a kind of radio-frequency (RF) front-end circuit and system.
Background technology
In a wireless communication system, radio-frequency (RF) front-end circuit generally all can be set the radio frequency signal being about to radio frequency signal or the reception sent is amplified, have good communication quality to make radio communication both sides.
Wherein, for the TDD wireless communication system of extensive use, as shown in Figure 2, visible emission link 11 shares an antenna 13 with receiver 12 to the structure of its radio-frequency (RF) front-end circuit; Wherein, the second diverter switch 14 can be launched or receive radio frequency signal by control antenna 13.Its specific works process is as follows:
When the second diverter switch 13 is connected with transmitting chain 11, will disconnect the connection with receiver 12, now antenna 13 will launch radio frequency signal; In like manner, when the second diverter switch 14 is connected with receiver 12, by the connection disconnected with send link 11, now antenna 13 will receive radio frequency signal.Due in real work, the radio frequency signal of reception or the radio frequency signal of transmission are all transmitted by the second diverter switch 14, and this will certainly introduce some unnecessary noises and unnecessary decay, thus does not utilize the communication of radio communication both sides.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of radio-frequency (RF) front-end circuit and system, to eliminate the noise and unnecessary decay that the second diverter switch introduces, thus improve the communication quality of radio communication both sides.
For achieving the above object, the embodiment of the present invention provides following technical scheme:
A kind of radio-frequency (RF) front-end circuit, comprising:
Diverter switch;
The attenuator be connected with described diverter switch respectively and filter;
The power amplifier device be connected with described attenuator;
The transmitting antenna be connected with described power amplifier device;
The low noise amplifier be connected with described filter;
The reception antenna be connected with described low noise amplifier.
Preferably, described power amplifier device comprises:
The first power divider be connected with described attenuator;
The first power amplifier be connected with described first power divider respectively and the second power amplifier;
One end is connected with the second power amplifier with described first power amplifier respectively, the power combiner that the other end is connected with described transmitting antenna.
Preferably, described filter comprises band pass filter.
Preferably, described diverter switch comprises radio frequency converting switch.
A kind of radio-frequency front-end system, comprising:
Radio-frequency (RF) front-end circuit as described in any one of claim 1-4 and wireless signal transceiver;
Wherein, described wireless signal transceiver is connected with the diverter switch in described radio-frequency (RF) front-end circuit.
Preferably, described wireless signal transceiver comprises wireless router.
Preferably, described wireless signal transceiver comprises wireless network card.
Preferably, described wireless signal transceiver comprises wireless bridge.
Preferably, described wireless signal transceiver comprises radio network gateway.
Preferably, described system also comprises:
The second power divider be connected with wireless signal transceiver with described diverter switch respectively.
As can be seen from above-mentioned technical scheme, in embodiments of the present invention, for the transmitting chain be made up of attenuator and power amplifier device arranges a transmitting antenna, for launching radio frequency signal; And one reception antenna is also set, for receiving radio frequency signal for the receiver be made up of filter and low noise amplifier.Therefore, all launch or reception radio frequency signal for control antenna without the need to arranging a diverter switch in radio-frequency (RF) front-end circuit in the present invention and system, therefore can eliminate the noise introduced by this diverter switch and unnecessary decay, thus improve the communication quality of radio communication both sides.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the module map of radio-frequency (RF) front-end circuit of the prior art;
The module map of the radio-frequency (RF) front-end circuit that Fig. 2 provides for the embodiment of the present invention;
The another module map of the radio-frequency (RF) front-end circuit that Fig. 3 provides for the embodiment of the present invention;
One module map of the radio-frequency front-end system that Fig. 4 provides for the embodiment of the present invention;
The another module map of the radio-frequency front-end system that Fig. 5 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present embodiment part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the present invention.
The invention discloses a kind of structure of radio-frequency (RF) front-end circuit, as shown in Figure 2, comprising:
Diverter switch 21;
Concrete, diverter switch 21 can be radio frequency converting switch;
The attenuator 22 be connected with diverter switch 21 respectively and filter 23;
Concrete, filter 23 can be band pass filter;
The power amplifier device 24 be connected with attenuator 22;
The transmitting antenna 25 be connected with power amplifier device 24;
The low noise amplifier 26 be connected with filter 23;
The reception antenna 27 be connected with low noise amplifier 26;
Therefore, in embodiments of the present invention, for the transmitting chain be made up of attenuator 22 and power amplifier device 24 arranges a transmitting antenna 25, for launching radio frequency signal; And one reception antenna 27 is also set, for receiving radio frequency signal for the receiver be made up of filter 23 and low noise amplifier 26.Therefore, launching or reception radio frequency signal for control antenna without the need to arranging a diverter switch in radio-frequency (RF) front-end circuit in the present invention, therefore can eliminate the noise that this diverter switch is introduced, thus improving the communication quality of radio communication both sides.In addition, due to without the need to arranging above-mentioned diverter switch, the energy consumption of radio-frequency (RF) front-end circuit and the power output of increasing power amplifier can also be saved.
In other embodiments of the present invention, as shown in Figure 3, the power amplifier device 24 in above-mentioned all embodiments can comprise:
The first power divider 31 be connected with attenuator 22;
The first power amplifier 32 and the second power amplifier 33 be connected with the first power divider 31 respectively;
One end is connected with the second power amplifier 33 with the first power amplifier 32 respectively, the power combiner 34 that the other end is connected with transmitting antenna 25.
The invention also discloses a kind of radio-frequency front-end system, as shown in Figure 4, comprising:
Above-mentioned radio-frequency (RF) front-end circuit 41 and wireless signal transceiver 42;
Wherein, wireless signal transceiver 42 is connected with the diverter switch 21 in radio-frequency (RF) front-end circuit 41.
Concrete, wireless signal transceiver 42 can comprise wireless router, wireless network card, wireless bridge and radio network gateway etc.
Therefore above-mentioned radio-frequency front-end system, also launching or reception radio frequency signal for control antenna without the need to arranging a diverter switch, therefore can eliminate the noise that this diverter switch is introduced, thus improving the communication quality of radio communication both sides.
In other embodiments of the present invention, the system in above-mentioned all embodiments, as shown in Figure 5, also can comprise:
The second power divider 43 be connected with wireless signal transceiver 42 with diverter switch 21 respectively.
Wherein, the radio frequency signal that wireless signal transceiver 42 inputs can be divided into two-way by the second power divider 43, and a road is sent to diverter switch 21, and another road can be sent to wave detector.
Therefore, by said system, add the second power divider 43, detection can be carried out to the radio frequency signal of input.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (8)
1. a radio-frequency (RF) front-end circuit, is characterized in that, comprising:
Diverter switch;
The attenuator be connected with described diverter switch respectively and filter;
The power amplifier device be connected with described attenuator;
The transmitting antenna be connected with described power amplifier device;
The low noise amplifier be connected with described filter;
The reception antenna be connected with described low noise amplifier;
Wherein, described diverter switch comprises radio frequency converting switch;
Described power amplifier device comprises:
The first power divider be connected with described attenuator;
The first power amplifier be connected with described first power divider respectively and the second power amplifier;
One end is connected with the second power amplifier with described first power amplifier respectively, the power combiner that the other end is connected with described transmitting antenna.
2. circuit according to claim 1, is characterized in that, described filter comprises band pass filter.
3. a radio-frequency front-end system, is characterized in that, comprising:
Radio-frequency (RF) front-end circuit as claimed in claim 1 or 2 and wireless signal transceiver;
Wherein, described wireless signal transceiver is connected with the diverter switch in described radio-frequency (RF) front-end circuit.
4. system according to claim 3, is characterized in that, described wireless signal transceiver comprises wireless router.
5. system according to claim 3, is characterized in that, described wireless signal transceiver comprises wireless network card.
6. system according to claim 3, is characterized in that, described wireless signal transceiver comprises wireless bridge.
7. system according to claim 3, is characterized in that, described wireless signal transceiver comprises radio network gateway.
8. system according to claim 3, is characterized in that, also comprises:
The second power divider be connected with wireless signal transceiver with described diverter switch respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310572197.1A CN103546189B (en) | 2013-11-13 | 2013-11-13 | Radio-frequency (RF) front-end circuit and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310572197.1A CN103546189B (en) | 2013-11-13 | 2013-11-13 | Radio-frequency (RF) front-end circuit and system |
Publications (2)
| Publication Number | Publication Date |
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| CN103546189A CN103546189A (en) | 2014-01-29 |
| CN103546189B true CN103546189B (en) | 2016-04-13 |
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| CN201310572197.1A Active CN103546189B (en) | 2013-11-13 | 2013-11-13 | Radio-frequency (RF) front-end circuit and system |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103546489B (en) * | 2013-11-05 | 2017-05-03 | 腾讯科技（武汉）有限公司 | Method, server and system for authority control |
| CN104218903A (en) * | 2014-08-15 | 2014-12-17 | 苏州华士无线科技有限公司 | WiFi (wireless fidelity) signal amplifier based on automatic gain control technology |
| CN109962721A (en) * | 2017-12-26 | 2019-07-02 | 天津大学（青岛）海洋工程研究院有限公司 | A kind of RF front-end circuit for software radio transceiver |
| CN108768415A (en) * | 2018-05-22 | 2018-11-06 | Oppo广东移动通信有限公司 | Radio circuit, antenna module and electronic equipment |
| CN114270712B (en) * | 2019-06-04 | 2023-12-08 | 株式会社Kmw | Time division duplex antenna device |
| CN111355508A (en) * | 2020-02-13 | 2020-06-30 | 芯朴科技(上海)有限公司 | Radio frequency circuit |
| CN114710178A (en) * | 2022-02-16 | 2022-07-05 | 晋江三伍微电子有限公司 | Radio frequency front-end module, communication circuit and electronic equipment |
| CN115297490A (en) * | 2022-07-27 | 2022-11-04 | 欧智通科技股份有限公司 | Device for expanding WI-FI radiation range |
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| CN103546189A (en) | 2014-01-29 |
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