CN102111174A - RF front-end circuit and wireless communication device using the same - Google Patents
RF front-end circuit and wireless communication device using the same Download PDFInfo
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- CN102111174A CN102111174A CN2010106056394A CN201010605639A CN102111174A CN 102111174 A CN102111174 A CN 102111174A CN 2010106056394 A CN2010106056394 A CN 2010106056394A CN 201010605639 A CN201010605639 A CN 201010605639A CN 102111174 A CN102111174 A CN 102111174A
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Abstract
The present invention discloses an RF front-end circuit for a wireless communication device, which includes an RF terminal coupled to an antenna of the wireless communication device, for receiving or transmitting wireless signals; and a switch for connecting a plurality of processing modules to the RF terminal according to operations of the wireless communication device.
Description
Technical field
(radio frequency, RF) front-end circuit relate in particular to a kind of minimization and more uncomplicated radio-frequency (RF) front-end circuit to the present invention relates to a kind of radio frequency.
Background technology
Along with the differentiation of the communication technology, radio communication device, as radio area network (wireless local area network, WLAN) device etc., become the important media of information exchange, thereby be widely used in the modern society.Therefore, how to reduce the cost of manufacture and the price of radio communication device, and simplify it and make flow process and become radio communication device challenge in the design phase.For double-frequency wireless communicator (as supporting the wireless zone network card of 2.4GHz and 5GHz communication), this challenge is more difficult reaching because the circuit of dual band radio frequency front-end circuit is quite complicated.
Please refer to Fig. 1, Fig. 1 is the schematic diagram that is used for a known radio-frequency (RF) front-end circuit 100 of a known wireless communication device.The signal of 2.4GHz and 5GHz can be transmitted and receive to radio-frequency (RF) front-end circuit 100, include an antenna 110, wideband transmitting-receiving (transmitting/receiving, T/R) derailing switch 101, frequency divider 102 and 103, low noise amplifier 104 and 105, power amplifier 106 and 107 and band pass filter (bandpass filter, BPF) 108 and 109.Wideband transmit-receive switch device 101 is double frequency derailing switches, as a single-pole double throw (single pole double throw SPDT) derailing switch, is used for switching transmission and the operation that receives. Frequency divider 102 and 103 separable 5GHz signal and 2.4GHz signals, and can reduce interference between above-mentioned two signals (may vibrate because of the interference of 2.4GHz signal) because be used for 5GHz signal amplifier 105 and 107.
The structure of radio-frequency (RF) front-end circuit 100 is quite complicated and need many assemblies, therefore is difficult to reduce size, cost and the weight of relevant wireless communication device.
In addition, frequency divider 102 and 103 is a passive device, and wideband transmit-receive switch device 101 and amplifier 104～107 are active cell.Therefore, in a layout stage of making radio-frequency (RF) front-end circuit 100, separately design of frequency divider 102 and 103, and can't be integrated in the wafer of active cell, thereby increase complexity and the cost of making flow process.
Moreover, wideband transmit-receive switch device 101 may cause the insertion loss (insertion loss) of about 1dB, and frequency divider 102 and 103 may cause the loss of 2dB, and this reduces the out-put supply of radio communication device except meeting, and the receiving sensitivity of radio communication device is had negative effect.
Therefore, be necessary to a kind of minimization of development and more uncomplicated radio-frequency (RF) front-end circuit in fact.
Summary of the invention
Therefore, main purpose of the present invention promptly is to provide a kind of radio-frequency (RF) front-end circuit and radio communication device.
The present invention discloses a kind of radio-frequency (RF) front-end circuit that is used for a radio communication device.This radio-frequency (RF) front-end circuit includes a radio-frequency head, is coupled to an antenna of this radio communication device, is used for receiving or transmitting wireless signals; And a derailing switch, be used for operation according to this radio communication device, connect a plurality of processing modules in this radio-frequency head.
The present invention discloses a kind of radio communication device that uses above-mentioned this radio-frequency (RF) front-end circuit in addition.
Description of drawings
Fig. 1 is the schematic diagram of a known radio-frequency (RF) front-end circuit.
Fig. 2 is the schematic diagram of a radio-frequency (RF) front-end circuit in the embodiment of the invention.
Fig. 3 is the schematic diagram of a radio-frequency (RF) front-end circuit in another embodiment of the present invention.
Fig. 4 is the present invention's schematic diagram of a radio-frequency (RF) front-end circuit among the embodiment more.
[main element symbol description]
100,20,30,40 radio-frequency (RF) front-end circuit
101 wideband transmit-receive switch devices
102,103 frequency dividers
104,105 low noise amplifiers
106,107 power amplifiers
108,109 band pass filters
110, ANT antenna
200,300,400 radio-frequency heads
202,302,402 derailing switches
204 controllers
304,308,312,404,406,408,412 amplifiers
310,314,410,414 band pass filters
306 discrete inductance electric capacity coupling
The road
WR_sys_1～WR_sys_n, WiFi_2.4G, wireless communication system WiFi_5G
RX_1～RX_n receiver module
TX_1～TX_n transport module
RX_sig_1～RX_sig_n, TX_sig_1～signal TX_sig_n, RX_sig_2.4G, RX_sig_5G, TX_sig_2.4G, TX_sig_5G
Embodiment
Please refer to Fig. 2, Fig. 2 is for being used for the schematic diagram of a radio-frequency (RF) front-end circuit 20 of a radio communication device in the embodiment of the invention.Radio-frequency (RF) front-end circuit 20 disposal operations are in the radiofrequency signal of the wireless communication system WR_sys_1～WR_sys_n of different frequency bands.Radio-frequency (RF) front-end circuit 20 includes a radio-frequency head 200, a derailing switch 202, receiver module RX_1～RX_n and transport module TX_1～TX_n.Radio-frequency head 200 connects the end points of derailing switches 202 and an antenna ANT of radio communication device, and meaning is that radio-frequency (RF) front-end circuit 20 can be separated with antenna ANT and designed or make.For asking simplification, but receiver module RX_1～RX_n and transport module TX_1～TX_n called after processing module.Receiver module RX_1～RX_n can receive operation, is sent to a base frequency process module with the signal RX_sig_1～RX_sig_n that will be received.Transport module TX_1～TX_n transmits operation, with via derailing switch 202, radio-frequency head 200 and antenna ANT output signal TX_sig_1～TX_sig_n to wireless communication system WR_sys_1～WR_sys_n.Derailing switch 202 is controlled by a controller 204, but among connection processing module RX_1～RX_n and the TX_1～TX_n processing module to radio-frequency head 200.For instance, when radio communication device received signal from wireless communication system WR_sys_1, controller 204 control switch devices 202 connected receiver module RX_1 and radio-frequency heads 200.During to wireless communication system WR_sys_1, controller 204 control switch devices 202 connect transport module TX_1 and radio-frequency heads 200 at the radio communication device transmission signals.
From the above, radio-frequency (RF) front-end circuit 20 does not comprise the passive device that is used for separating different frequency signals as frequency divider or multiplexer etc.Therefore, radio-frequency (RF) front-end circuit 20 can all design in same phase together, and can be integrated in same wafer or the chip, and then reduces radio-frequency (RF) front-end circuit 20 and make the complexity and the cost of flow processs.
Must notice that radio-frequency (RF) front-end circuit 20 shown in Figure 2 is used for illustrating notion of the present invention, those skilled in the art can modify or change according to this, and are not limited thereto.For instance, among the receiver module RX_1～RX_n shown in Figure 2 among each receiver module and the transport module TX_1～TX_n each transport module be considered as single processing module and be connected to derailing switch 202; Yet, in another embodiment, a plurality of modules can be combined into a processing module and be connected to the same side of derailing switch 202 among receiver module RX_1～RX_n or the transport module TX_1～TX_n, increase by a match circuit again to separate the signal of different wireless communication system, and they can be shown in following examples.
Please refer to Fig. 3 and Fig. 4, Fig. 3 and Fig. 4 are the schematic diagram of a radio-frequency (RF) front-end circuit 30 and a radio-frequency (RF) front-end circuit 40 in the embodiment of the invention.Radio-frequency (RF) front-end circuit 30 and radio-frequency (RF) front-end circuit 40 be WiFi_2.4G of support of wireless communication system and WiFi_5G all, wireless communication system WiFi_2.4G and WiFi_5G operate in the frequency band of 2.4GHz and 5GHz respectively, the situation of n=2 in the radio-frequency (RF) front-end circuit 20 promptly shown in Figure 2.
Specifically, radio-frequency (RF) front-end circuit 30 includes a radio-frequency head 300, a derailing switch 302, amplifier 304,308 and 312, one discrete inductance electric capacity match circuit 306 (discrete LC matching circuit) and band pass filter 310 and 314.Amplifier 304 is preferably a wide frequency low-noise amplifier (LNA), and scalable frequency is the received signal of 2.4GHz and 5GHz.Therefore, the amplifier 304 discrete inductance electric capacity match circuit 306 of can arranging in pairs or groups, realization is the processing module that two receiver modules of the received signal of 2.4GHz and 5GHz are formed by being used for handling frequency, and then output signal RX_sig_2.4G or RX_sig_5G to a base frequency process module etc.Amplifier 308 can be realized a transport module with band pass filter 310, with via derailing switch 302, radio-frequency head 300 and antenna ANT output signal TX_sig_2.4G to wireless communication system WiFi_2.4G.Similarly, amplifier 312 can be realized another transport module with band pass filter 314, with via derailing switch 302, radio-frequency head 300 and antenna ANT output signal TX_sig_5G to wireless communication system WiFi--_5G.
In Fig. 3, derailing switch 302 is a SP3T (Single Pole Triple Throw, SP3T) derailing switches.That is, a same side of two receiver module common switch devices 302, and, therefore increase discrete inductance electric capacity match circuit 306 in order to separate the received signal of 2.4GHz and 5GHz.Must note, discrete inductance electric capacity match circuit 306 can be other can separation 2.4GHz and the circuit or the unit of 5GHz signal.
Compared to known radio-frequency (RF) front-end circuit 100 as shown in Figure 1, radio-frequency (RF) front-end circuit 30 does not need frequency divider 102 and 103, therefore can eliminate the 2dB loss that frequency divider causes, and improve out-put supply and receiving sensitivity simultaneously.Moreover radio-frequency (RF) front-end circuit 30 can provide a better simply structure and use less assembly because of radio-frequency (RF) front-end circuit 30 and can reduce its size.Therefore, the radio communication device with this circuit can have reduced size.
In addition, derailing switch 302 is used for being connected to the end points of amplifier 308 and 312 in the radio-frequency (RF) front-end circuit 30, can handle single-frequency signals respectively because of these two ends and be easier to design.Thus, can concentrate the cost of exploitation derailing switch 302 and time to connect on the end points of amplifier 304, and need handle difficulty of two-frequency signal, therefore can reduce the time and the cost of this radio communication device of exploitation because of this end points in derailing switch 302.
Another advantage of embodiment shown in Figure 3 is to improve isolations of derailing switch 302 each end, so derailing switch 302 also can be used as a frequency divider, therefore can avoid being used for handling each circuit interference to each other of received signal or transmission signals.
The more advantage of embodiment shown in Figure 3 is removing because of passive components such as frequency dividers, amplifier 304,308 and 312 and derailing switch 302 can be integrated in one chip, therefore the exploitation of radio-frequency (RF) front-end circuit 30 is simpler, and can reduce the size and the cost of module.
Further, in Fig. 4, radio-frequency (RF) front-end circuit 40 includes a radio-frequency head 400, a derailing switch 402, amplifier 404,406,408 and 412 and band pass filter 410,414. Amplifier 404 and 406 can realize being used for handling the receiver module of 2.4GHz and 5GHz received signal respectively, with output signal RX_sig_2.4G or RX_sig_5G to a base frequency process module etc.Amplifier 408 and band pass filter 410 realized a transport module, with via derailing switch 402, radio-frequency head 400 and antenna ANT output signal TX_sig_2.4G to wireless communication system WiFi_2.4G.Similarly, amplifier 412 and band pass filter 414 realized another transport modules, with via derailing switch 402, radio-frequency head 400 and antenna ANT output signal TX_sig_5G to wireless communication system sWiFi_5G.Derailing switch 402 is that a hilted broadsword four is thrown (Single Pole Four Throw, SP4T) derailing switch; Therefore, each processing module is used an end of derailing switch 402, and promptly amplifier 404,406,408 and 412 is connected to four ends of derailing switch 402.
Shown in previous embodiment, derailing switch 302 connects the exploitation of the end points of amplifier 304 need handle difficulty of two-frequency signal because of this end points.In addition, broadband amplifiers 304 also causes difficult design.Therefore, radio-frequency (RF) front-end circuit 40 can be used another settling mode.Because amplifier 404,406,408 and 412 is used for handling the signal of single frequency band respectively, therefore removable as broadband amplifiers and derailing switch are used for being connected to the assembly that designs of difficulty such as the end points of broadband amplifiers.Thus, radio-frequency (RF) front-end circuit 40 can provide the advantage identical with radio-frequency (RF) front-end circuit 30 and the above-mentioned shortcoming of tool not.
The embodiment more according to the present invention is as radio communication devices such as a wireless zone network card or a radio universal serial bus radio zonal network device, the radio-frequency (RF) front-end circuit that can be furnished with the foregoing description.
Generally speaking, radio-frequency (RF) front-end circuit of the present invention does not need frequency divider, therefore can effectively reduce cost, complexity and the time of making radio-frequency (RF) front-end circuit.
The above only is the preferred embodiments of the present invention, and all equalizations of doing according to claims of the present invention change and modify, and all should belong to covering scope of the present invention.
Claims (10)
1. radio-frequency (RF) front-end circuit that is used for a radio communication device includes:
One radio-frequency head is coupled to an antenna of this radio communication device, is used for receiving or transmitting wireless signals; And
One derailing switch is used for operation according to this radio communication device, connects a plurality of processing modules in this radio-frequency head.
2. radio-frequency (RF) front-end circuit as claimed in claim 1, wherein these a plurality of processing modules include:
A plurality of receiver modules are used for handling received signal; And
A plurality of transport modules are used for handling transmission signals.
3. radio-frequency (RF) front-end circuit as claimed in claim 2, wherein these a plurality of receiver modules include:
One first receiver module is used for handling a received signal of a first frequency; And
One second receiver module is used for handling a received signal of a second frequency; And
These a plurality of transport modules include:
One first transport module is used for handling a transmission signals of this first frequency; And
One second transport module is used for handling a transmission signals of this second frequency.
4. radio-frequency (RF) front-end circuit as claimed in claim 1, wherein a processing module includes in these a plurality of processing modules:
One amplifier is coupled to this derailing switch, is used for amplifying one first received signal and one second received signal;
One first receiver module is used for handling this first received signal;
One second receiver module is used for handling this second received signal; And
One match circuit is coupled to this amplifier, this first receiver module and this second receiver module, is used for separating this first received signal and this second received signal.
5. radio-frequency (RF) front-end circuit as claimed in claim 4, wherein this first received signal receives in a first frequency, and this second received signal receives in a second frequency.
6. radio-frequency (RF) front-end circuit as claimed in claim 1, it also includes a controller and is used for operation according to this radio communication device, controls this derailing switch.
7. radio-frequency (RF) front-end circuit as claimed in claim 1, wherein these a plurality of wireless communication systems use different frequency bands.
8. radio-frequency (RF) front-end circuit as claimed in claim 1, wherein this derailing switch is a SP3T derailing switch.
9. radio-frequency (RF) front-end circuit as claimed in claim 1, wherein this derailing switch is a hilted broadsword four throw switch devices.
10. a radio communication device includes radio-frequency (RF) front-end circuit as claimed in claim 1, is used for handling the signal corresponding to a plurality of wireless communication systems.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US29017509P | 2009-12-25 | 2009-12-25 | |
| US61/290,175 | 2009-12-25 | ||
| US12/959,346 | 2010-12-02 | ||
| US12/959,346 US20110159823A1 (en) | 2009-12-25 | 2010-12-02 | RF Front-end Circuit and Wireless Communication Device Using the Same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102111174A true CN102111174A (en) | 2011-06-29 |
Family
ID=44175216
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010106056394A Pending CN102111174A (en) | 2009-12-25 | 2010-12-24 | RF front-end circuit and wireless communication device using the same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102111174A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103226536A (en) * | 2012-01-30 | 2013-07-31 | 英飞凌科技股份有限公司 | System and method for a bus interface |
| CN105379129A (en) * | 2013-07-16 | 2016-03-02 | 株式会社村田制作所 | Front end circuit |
| CN106025575A (en) * | 2016-07-01 | 2016-10-12 | 天津七二通信广播有限公司 | Antenna system applied to UV frequency band of communication terminal |
| CN107181498A (en) * | 2017-07-20 | 2017-09-19 | 珠海市魅族科技有限公司 | A kind of antenna controling circuit and mobile terminal |
| CN110225603A (en) * | 2019-05-16 | 2019-09-10 | 普联技术有限公司 | Wireless network card system, control method, device, storage medium and communication equipment |
| WO2021104456A1 (en) * | 2019-11-29 | 2021-06-03 | 维沃移动通信有限公司 | Radio frequency circuit and electronic device |
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| CN1407651A (en) * | 2001-08-27 | 2003-04-02 | 松下电器产业株式会社 | RF device and communication device therewith |
| US20050227631A1 (en) * | 2004-04-13 | 2005-10-13 | Robinett Robert L | Multi-antenna transceiver system |
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2010
- 2010-12-24 CN CN2010106056394A patent/CN102111174A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1407651A (en) * | 2001-08-27 | 2003-04-02 | 松下电器产业株式会社 | RF device and communication device therewith |
| US20050227631A1 (en) * | 2004-04-13 | 2005-10-13 | Robinett Robert L | Multi-antenna transceiver system |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103226536A (en) * | 2012-01-30 | 2013-07-31 | 英飞凌科技股份有限公司 | System and method for a bus interface |
| CN103226536B (en) * | 2012-01-30 | 2017-05-03 | 英飞凌科技股份有限公司 | System and method for a bus interface |
| US9817782B2 (en) | 2012-01-30 | 2017-11-14 | Infineon Technologies Ag | System and method for a bus interface |
| CN105379129A (en) * | 2013-07-16 | 2016-03-02 | 株式会社村田制作所 | Front end circuit |
| US9979419B2 (en) | 2013-07-16 | 2018-05-22 | Murata Manufacturing Co., Ltd. | Front-end circuit |
| CN106025575A (en) * | 2016-07-01 | 2016-10-12 | 天津七二通信广播有限公司 | Antenna system applied to UV frequency band of communication terminal |
| CN107181498A (en) * | 2017-07-20 | 2017-09-19 | 珠海市魅族科技有限公司 | A kind of antenna controling circuit and mobile terminal |
| CN110225603A (en) * | 2019-05-16 | 2019-09-10 | 普联技术有限公司 | Wireless network card system, control method, device, storage medium and communication equipment |
| WO2021104456A1 (en) * | 2019-11-29 | 2021-06-03 | 维沃移动通信有限公司 | Radio frequency circuit and electronic device |
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Application publication date: 20110629 |
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