CN201928273U - Quad-band global system for mobile communication (GSM) transmit-receive device and wireless terminal of same - Google Patents
Quad-band global system for mobile communication (GSM) transmit-receive device and wireless terminal of same Download PDFInfo
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- CN201928273U CN201928273U CN2010206669685U CN201020666968U CN201928273U CN 201928273 U CN201928273 U CN 201928273U CN 2010206669685 U CN2010206669685 U CN 2010206669685U CN 201020666968 U CN201020666968 U CN 201020666968U CN 201928273 U CN201928273 U CN 201928273U
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- frequency
- filter
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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
- H04B1/005—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 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
- H04B1/0053—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 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band
- H04B1/0057—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 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band using diplexing or multiplexing filters for selecting the desired band
-
- 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
- H04B1/005—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 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
- H04B1/0053—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 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band
- H04B1/006—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 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band using switches for selecting the desired band
Abstract
The utility model discloses a quad-band global system for mobile communication (GSM) transmit-receive device and a wireless terminal of the GSM transmit-receive device. The GSM transmit-receive device comprises an antenna, a dual-band antenna switch which is connected with the antenna and two filter selected units respectively, two filter selected units, four filters with different frequency bands and a radio frequency transmit-receive chip with two receiving channels. The input ends of the two filter selected units are respectively connected with two receiving frequency band channels corresponding to the dual-band antenna switch. The input ends of two filters are both connected with an identical filter selected unit and the input ends of the other two filters are both connected with the other filter selected unit. One receiving channel of the radio frequency transmit-receive chip is connected with the output ends of the two filters respectively and the other receiving channel of the radio frequency transmit-receive chip is connected with the output ends of the other two filters respectively. The technical scheme of the GSM transmit-receive device is capable of reducing difficulties of layout and route and reducing hardware cost of the quad-band GSM scheme to the largest extent.
Description
Technical field
The utility model relates to the communications field, in particular to a kind of four frequency range global mobile communications (Globalsystem for Mobile Communication abbreviates GSM as) R-T unit and wireless terminal.
Background technology
Because popularizing and advantage cheaply of end product such as GSM mobile handset, occupation rate of market is higher, and comparatively common low-end mobile phone substantially all is the GSM dual-band mobile phone at present, and this is can bring higher cost owing to carry out GSM four design of mobile phones frequently at present.
At present, one four frequency band GSM mobile phone need be used the duplexer that a hilted broadsword six is thrown, one possesses four radio-frequency power amplifiers (PA) that take place frequently and penetrate function and port, on four frequency ranges, join a surface acoustic wave (SAW) filter respectively, enter the rf chip (RF Transceiver) of four receive paths (GSM900/GSM1800/GSM850/GSM1900) at last.Specifically can be referring to Fig. 1 and Fig. 2.
Fig. 1 is the hardware designs framework map of four band transmit and receiver in the correlation technique.Fig. 2 is common four band transmit and receiver logic control configuration relation figure shown in Figure 1.As can see from Figure 2, transmitter has two lines of departure and four reception lines, and duplexer is that hilted broadsword six is thrown like this, needs six kinds of states, and promptly duplexer has six kinds of logic states.And receiver also needs four groups of differential pairs just can finish reception to four frequency ranges.So following conclusion can be arranged, it is exactly scheme according to Fig. 1, can cause duplexer to have a lot of states so, the pin of transmitter and receiver also can be a lot, not only cause the increase of transmitter and receiver hardware cost, and can cause the difficulty of layout cabling because of a lot of pins that transmit and receive and cabling.
The utility model content
At four frequently the pin of GSM transmitter and receivers is more in the correlation technique, cause problems such as the difficulty of layout cabling and hardware cost increase, the utility model provides a kind of four frequency band GSM R-T unit and wireless terminals, one of to address the above problem at least.
According to an aspect of the present utility model, a kind of four frequency band GSM R-T units are provided.
According to four frequency band GSM R-T units of the present utility model except comprising: antenna also comprises: the dual-band antenna switch is connected with two filter selected cells with described antenna respectively; Described two filter selected cells, its input is connected on two reception frequency range passages of described dual-band antenna switch correspondence, wherein, each described filter selected cell is used for selecting one to carry out filtering operation at connected at least two filters; The filter of four different frequency ranges, wherein the input of two filters all with described two filter selected cells in same being connected, the input of all the other two filters all is connected with in described two filter selected cells another; Rf chip with two receive paths, wherein, a receive path is connected with the described wherein output of two filters respectively, and another receive path is connected with the output of described all the other two filters respectively.
Further, above-mentioned two filter selected cells are single-pole double-throw switch (SPDT).
Further, the filter of above-mentioned four different frequency ranges is surface acoustic wave SAW filter.
Further, above-mentioned wherein two filters are the high band filter, and wherein, the frequency range of described high band filter correspondence is higher than predetermined threshold; Above-mentioned all the other two filters are low band filter, and wherein, the frequency range of described low band filter correspondence is lower than described predetermined threshold.
Further, above-mentioned rf chip comprises: low frequency LNA and high frequency LNA; Described high band filter is connected with described high frequency LNA by a receive path of described rf chip; Described low band filter is connected with described low frequency LNA by another receive path of described rf chip.
Further, the frequency range of above-mentioned high band filter correspondence is GSM 1800 frequency ranges and GSM 1900 frequency ranges; The frequency range of described low band filter correspondence is GSM 850 frequency ranges and GSM 900 frequency ranges.
Further, above-mentioned R-T unit also comprises: radio-frequency power amplifier, on the transmission channel between described dual-band antenna switch and the described rf chip; Described dual-band antenna switch and described radio-frequency power amplifier are integrated in the radiofrequency emitting module.
Further, above-mentioned antenna is the passive device with quadruple-frequency transceiving function.
According on the other hand of the present utility model, provide a kind of wireless terminal.
Comprise aforementioned any four frequency band GSMs R-T unit according to wireless terminal of the present utility model.
Pass through the utility model, adopt a dual-band antenna switch and two filter selected cells to select suitable SAW filter to realize GSM four scheme frequently, the pin of GSM transmitter and receivers is more frequently to have solved in the correlation technique four, cause problems such as the difficulty of layout cabling and hardware cost increase, and then can reduce the difficulty of layout cabling, farthest reduce by four hardware costs of GSM schemes frequently.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present utility model, constitutes the application's a part, and illustrative examples of the present utility model and explanation thereof are used to explain the utility model, do not constitute improper qualification of the present utility model.In the accompanying drawings:
Fig. 1 is the hardware designs framework map of four band transmit and receiver in the correlation technique;
Fig. 2 is four band transmit and receiver logic control configuration relation figure shown in Figure 1;
Fig. 3 is the hardware designs framework map according to the four frequency band GSM R-T units of the utility model embodiment;
Fig. 4 is the logic control configuration relation figure according to four frequency band GSM R-T units of the utility model preferred embodiment.
Embodiment
Hereinafter will describe the utility model with reference to the accompanying drawings and in conjunction with the embodiments in detail.Need to prove that under the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.
According to the utility model embodiment, a kind of four frequency band GSM R-T units are provided.
Fig. 3 is the hardware designs framework map according to the four frequency band GSM R-T units of the utility model embodiment.As shown in Figure 3, this four frequency band GSMs R-T unit is except comprising: antenna 1 also comprises: the filter 5,6,7 of dual-band antenna switch 2, two filter selected cells 3 and 4, four different frequency ranges and 8 and rf chip 9 with two receive paths.Wherein,
Dual-band antenna switch 2 is connected with 4 with two filter selected cells 3 with described antenna 1 respectively;
Described two filter selected cells 3 and 4, its input is connected on two reception frequency range passages of described dual-band antenna switch correspondence, wherein, each described filter selected cell is used for selecting one to carry out filtering operation (for example, filter selected cell 3 can be selected and carry out filtering operation in connected filter 5,6) at connected at least two filters;
The filter 5,6,7 and 8 of four different frequency ranges, wherein two filters 5 and 6 input all are connected with same filter selected cell 3 in described two filter selected cells, and all the other two filters 7 and 8 input all are connected with another filter selected cell 4 in described two filter selected cells;
Rf chip 9 with two receive paths, wherein, receive path is connected with 6 output with above-mentioned two filters 5 respectively, and another receive path is connected with 8 output with above-mentioned two filters 7 respectively.
In said apparatus, adopt a dual-band antenna switch and two filter selected cells to select suitable filters to realize GSM four scheme frequently, the pin of GSM transmitter and receivers is more frequently to have solved in the correlation technique four, cause problems such as the difficulty of layout cabling and hardware cost increase, and then can reduce the difficulty of layout cabling, farthest reduce by four hardware costs of GSM schemes frequently.
Wherein, above-mentioned antenna can be for having the passive device of quadruple-frequency transceiving function.
Preferably, described two filter selected cells can be single-pole double-throw switch (SPDT).Certainly, in specific implementation process, can also adopt other components and parts to realize the selection function of filter.For example: radio frequency duplexer etc.
Adopt single-pole double-throw switch (SPDT), be easy to realize the selection function of filter, and manufacturing cost is lower.
Preferably, the filter of described four different frequency ranges can be surface acoustic wave (SAW) filter.
Adopt Surface Acoustic Wave Filter to carry out filtering, filter effect is better.Certainly, in specific implementation process, also can adopt other filters to carry out filtering to the received signal.
Preferably, above-mentioned wherein two filters can be set to the high band filter, and wherein, the frequency range of described high band filter correspondence is higher than predetermined threshold; Above-mentioned all the other two filters can be set to low band filter, and wherein, the frequency range of described low band filter correspondence is lower than described predetermined threshold.
Wherein, the frequency range of above-mentioned high band filter correspondence is generally GSM 1800 frequency ranges and GSM 1900 frequency ranges.The frequency range of above-mentioned low band filter correspondence is generally GSM 850 frequency ranges and GSM 900 frequency ranges.
Preferably, above-mentioned rf chip includes but not limited to: low frequency LNA and high frequency LNA; Wherein, above-mentioned high band filter can be connected with high frequency LNA by a receive path of rf chip; Low band filter is connected with low frequency LNA by another receive path of rf chip.
In preferred implementation process, can on the low frequency receive path, increase a single-pole double-throw switch (SPDT), carry out the selection of GSM850 and GSM900, thereby enter different SAW filters, their difference output channel merges the laggard radio frequency transceiving chip low frequency LNA of going into and is for further processing; Also increase a single-pole double-throw switch (SPDT) on the high frequency receive path, carry out the selection of GSM1800 and GSM1900, thereby enter different SAW filters, their difference output channel merges the laggard radio frequency transceiving chip high frequency LNA of going into and is for further processing.
It should be noted that, above-mentioned four frequency band GSM R-T units can also comprise: a radio-frequency power amplifier, on the transmission channel between described dual-band antenna switch and the described rf chip, in specific implementation process, above-mentioned dual-band antenna switch 2 and this radio-frequency power amplifier can be integrated in the radiofrequency emitting module, also can independent layout.Rf chip 9 can be gone out signal via PA and antenna transmission, specifically can repeat no more referring to the record in the correlation technique herein.
Below in conjunction with the example of Fig. 4 above-mentioned preferred implementation is described.
Fig. 4 is the logic control configuration relation figure according to four frequency band GSM R-T units of the utility model preferred embodiment.As shown in Figure 4, this four frequency band GSMs R-T unit is except comprising: antenna 1 and the PA 10, can also comprise: hilted broadsword four is thrown the filter 5,6,7 and 8 of dual-band antenna switch 2, two single-pole double-throw switch (SPDT)s 3 and 4, four different frequency ranges, and the rf chip 9 with two receive paths.
Hilted broadsword four is thrown dual-band antenna switch 2, is connected with two filter selected cells with antenna respectively;
Two single-pole double-throw switch (SPDT)s 3 and 4, its input is connected on two reception frequency range passages of dual-band antenna switch correspondence, wherein, as seen from Figure 6, each described single-pole double-throw switch (SPDT) can select 1 to carry out filtering operation in 2 filters corresponding with it; Each single-pole double-throw switch (SPDT) is arranged on the front end of 2 filters of its correspondence, by this processing, is convenient to realize the functional requirement of four frequencies, and the layout cabling is more simplified;
Rf chip 5,6,7 and 8 with two receive paths, wherein, a receive path is connected with the output of low-frequency range GSM850 filter with low-frequency range GSM900 filter respectively, and another receive path is connected with the output of high band GSM1800 filter with high band GSM1900 filter respectively.
It should be noted that as shown in Figure 4 the transmission channel of rf chip is connected with PA 10, rf chip is gone out signal via PA and antenna transmission, specifically can repeat no more referring to the record in the correlation technique herein.
Further,, be provided with two single-pole double-throw switch (SPDT)s respectively, can select frequency range by throwing at hilted broadsword four on the low-and high-frequency receive path between dual-band antenna switch and the rf chip.Particularly, the single-pole double-throw switch (SPDT) on the low frequency receive path carries out the selection of GSM850 frequency range and GSM900 frequency range, thereby enters different SAW filters, and their difference output channel merges the laggard radio frequency transceiving chip low frequency LNA of going into and is for further processing; Single-pole double-throw switch (SPDT) on the high frequency receive path carries out the selection of GSM1800 frequency range and GSM1900 frequency range, thereby enters different SAW filters, and their difference output channel merges the laggard radio frequency transceiving chip high frequency LNA of going into and is for further processing.
According to the utility model embodiment, a kind of wireless terminal also is provided, this wireless terminal includes but not limited to above-mentioned four frequency band GSM R-T units.Wherein, this four frequency band GSMs R-T unit can repeat no more referring to the description of Fig. 3 to Fig. 4 herein.
In sum,, adopt above-mentioned four frequency band GSM R-T units, can more easily realize GSM four scheme frequently by the foregoing description that the utility model provides.The signal distinguishing that process radiofrequency emitting module or dual-band antenna switch (ASM) time division multiplexing will receive or launch provides suitable hardware link; When being in accepting state, SAW filter receive path is accurately selected in corresponding single-pole double-throw switch (SPDT) logic control, realizes entering the preceding strict Filtering Processing of rf chip, guarantees that the receptivity of terminal adheres to specification.Aspect the circuit realization, layout, cabling are also more simplified, and have further reduced the cost of GSM four wireless terminal product design frequently, and to receiving and dispatching performance without any influence, have realized the function of the normal receiving and transmitting signal of wireless terminal product.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present utility model or each step can realize with the general calculation device, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and carry out by calculation element, and in some cases, can carry out step shown or that describe with the order that is different from herein, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the utility model is not restricted to any specific hardware and software combination.
Be preferred embodiment of the present utility model only below, be not limited to the utility model, for a person skilled in the art, the utility model can have various changes and variation.All within spirit of the present utility model and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection range of the present utility model.
Claims (9)
1. frequency range global mobile communication GSM R-T unit, comprising: antenna is characterized in that described R-T unit also comprises:
The dual-band antenna switch is connected with two filter selected cells with described antenna respectively;
Described two filter selected cells, its input is connected on two reception frequency range passages of described dual-band antenna switch correspondence, wherein, each described filter selected cell is used for selecting one to carry out filtering operation at connected at least two filters;
The filter of four different frequency ranges, wherein the input of two filters all with described two filter selected cells in same being connected, the input of all the other two filters all is connected with in described two filter selected cells another;
Rf chip with two receive paths, wherein, a receive path is connected with the described wherein output of two filters respectively, and another receive path is connected with the output of described all the other two filters respectively.
2. R-T unit according to claim 1 is characterized in that, described two filter selected cells are single-pole double-throw switch (SPDT).
3. R-T unit according to claim 1 is characterized in that, the filter of described four different frequency ranges is surface acoustic wave SAW filter.
4. R-T unit according to claim 1 is characterized in that,
Described wherein two filters are the high band filter, and wherein, the frequency range of described high band filter correspondence is higher than predetermined threshold;
Described all the other two filters are low band filter, and wherein, the frequency range of described low band filter correspondence is lower than described predetermined threshold.
5. R-T unit according to claim 4 is characterized in that, described rf chip comprises: low frequency LNA and high frequency LNA;
Described high band filter is connected with described high frequency LNA by a receive path of described rf chip;
Described low band filter is connected with described low frequency LNA by another receive path of described rf chip.
6. R-T unit according to claim 4 is characterized in that,
The frequency range of described high band filter correspondence is GSM 1800 frequency ranges and GSM 1900 frequency ranges;
The frequency range of described low band filter correspondence is GSM 850 frequency ranges and GSM 900 frequency ranges.
7. R-T unit according to claim 1 is characterized in that,
Described R-T unit also comprises: radio-frequency power amplifier, sending out between described dual-band antenna switch and described rf chip;
Described dual-band antenna switch and described radio-frequency power amplifier are integrated in the radiofrequency emitting module.
8. R-T unit according to claim 1 is characterized in that, described antenna is the passive device with quadruple-frequency transceiving function.
9. a wireless terminal is characterized in that, described wireless terminal comprises as each described four frequency band GSM R-T units in the claim 1 to 8.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206669685U CN201928273U (en) | 2010-12-17 | 2010-12-17 | Quad-band global system for mobile communication (GSM) transmit-receive device and wireless terminal of same |
| PCT/CN2011/071420 WO2012079308A1 (en) | 2010-12-17 | 2011-03-01 | Four frequency bands global system for mobile communication transceiver and radio terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206669685U CN201928273U (en) | 2010-12-17 | 2010-12-17 | Quad-band global system for mobile communication (GSM) transmit-receive device and wireless terminal of same |
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| Publication Number | Publication Date |
|---|---|
| CN201928273U true CN201928273U (en) | 2011-08-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206669685U Expired - Lifetime CN201928273U (en) | 2010-12-17 | 2010-12-17 | Quad-band global system for mobile communication (GSM) transmit-receive device and wireless terminal of same |
Country Status (2)
| Country | Link |
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| CN (1) | CN201928273U (en) |
| WO (1) | WO2012079308A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102437864A (en) * | 2011-09-13 | 2012-05-02 | 惠州Tcl移动通信有限公司 | Radio frequency signal transceiving module and mobile phone |
| CN103780280A (en) * | 2014-02-27 | 2014-05-07 | 华为技术有限公司 | Radio frequency path |
| CN106506036A (en) * | 2016-11-16 | 2017-03-15 | 珠海市魅族科技有限公司 | Radio circuit and mobile terminal |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101882941A (en) * | 2010-07-07 | 2010-11-10 | 中兴通讯股份有限公司 | Device and equipment for quadruple-frequency transceiving of global mobile communication system |
-
2010
- 2010-12-17 CN CN2010206669685U patent/CN201928273U/en not_active Expired - Lifetime
-
2011
- 2011-03-01 WO PCT/CN2011/071420 patent/WO2012079308A1/en active Application Filing
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102437864A (en) * | 2011-09-13 | 2012-05-02 | 惠州Tcl移动通信有限公司 | Radio frequency signal transceiving module and mobile phone |
| CN103780280A (en) * | 2014-02-27 | 2014-05-07 | 华为技术有限公司 | Radio frequency path |
| CN103780280B (en) * | 2014-02-27 | 2016-06-15 | 华为技术有限公司 | Radio frequency path |
| US9379754B2 (en) | 2014-02-27 | 2016-06-28 | Huawei Technologies Co., Ltd. | Radio frequency channel |
| CN106506036A (en) * | 2016-11-16 | 2017-03-15 | 珠海市魅族科技有限公司 | Radio circuit and mobile terminal |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2012079308A1 (en) | 2012-06-21 |
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| GR01 | Patent grant | ||
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Granted publication date: 20110810 |
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| CX01 | Expiry of patent term |