CN200990608Y - Multi-frequency channel antenna for mobile terminal - Google Patents
Multi-frequency channel antenna for mobile terminal Download PDFInfo
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- CN200990608Y CN200990608Y CNU2006200481375U CN200620048137U CN200990608Y CN 200990608 Y CN200990608 Y CN 200990608Y CN U2006200481375 U CNU2006200481375 U CN U2006200481375U CN 200620048137 U CN200620048137 U CN 200620048137U CN 200990608 Y CN200990608 Y CN 200990608Y
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Abstract
The utility model provides a multi band antenna which is applied in movable termination and comprises an antenna body and a band selection device which is applied to respectively select each band of a plurality of bands and which comprises a plurality of matching circuit and a choice device for the purpose of that the band signals of each matching circuit do not interfere each other. The band selection device also comprises a plurality of output ports. A shifter can be also arranged between a plurality of matching circuits and the output ports, which is used for band switching of the matching circuit output signal and output to the output port. Wherein, the amount of the output port is larger than the amount of the matching circuit which can be T shape, Pi shape or L shape. The movable termination at least comprises one of a movable electronic cash register and a mobile phone. The utility model can receive or send multi band signals without changing the size of the antenna and has low cost and strong practicability.
Description
Technical field
The utility model relates to a kind of antenna assembly of portable terminal, especially can realize receiving or launching the antenna assembly of multi-band signal on portable terminal.
Background technology
At present, use the product of dual-band antenna a lot of on the market, for example on the DFS double frequency shift mobile phone, usually dual-band antenna can be installed in order to receive two different frequency ranges.A lot of lists of references is also arranged in the implementation of setting forth dual-band antenna, U.S. Patent application " Dual-band TransmissionDevice and Antenna the Therefbr " (patent No.: 6 for example, 545,640) just apply for a kind of technology of making dual-band antenna, for example denomination of invention is that " dual-band antenna ", application number have also been set forth a kind of dual-band antenna for the Chinese patent application of " 03145382.1 " again.
Not only be confined to dual-band antenna, some product may need three-frequency antenna and even four antenna frequently.For example, there have been three frequency displacement mobile phones and four frequency displacement mobile phones on the market.Such product still has certain market demand, and for example some product may should be applied to north America region (using two frequency ranges of PCS1900/GSM850), is applied to European Region (using two frequency ranges of GSM900/1800) again.A kind of simple method is to produce two product, satisfies the needs in an area respectively, but can cause coml not convenient so undoubtedly.Best solution is to make a product support four frequency ranges can satisfy the use at north America region and European Region respectively to guarantee this product simultaneously.
Similarly, other products, for example also can there be this type of demand in mobile electron cash register portable terminals such as (POS).
In traditional solution, often adopt the increase antenna volume to make antenna itself can receive four frequency ranges, for example above-mentioned intelligent mobile phone, but such solution is for often not being suitable under the confined situation of antenna volume.The electronic cash register of for example above-mentioned employing gprs system, it is inner to exist the printing device that volume is bigger, thereby causes the volume of other equipment can not be excessive, has therefore also just limited the antenna volume of this mobile electron cash register.
In this case, our mode that need not increase antenna volume realizes a kind of antenna that can realize receiving a plurality of frequency band signals on the portable terminal that is applied in.
The utility model content
Therefore, the purpose of this utility model provides a kind of antenna that is applied to realize on the portable terminal a plurality of frequency band signals of reception.
According to an aspect of the present utility model, a kind of multiband aerial that is used for portable terminal is provided, comprise: antenna body, can receive or launch the pairing frequency band signals of these a plurality of frequency ranges, it is characterized in that, also comprise frequency band selection device, be used for selecting respectively each frequency range of a plurality of frequency ranges.
Preferably, described frequency band selection device comprises a plurality of match circuits, is respectively applied for the frequency band signals that described antenna body is received and carries out frequency-selecting, and export the frequency range of determining after the frequency-selecting separately respectively.
Preferably, described frequency band selection device also comprises: choice device is used for of described a plurality of match circuits is handled and exported to the frequency band signals that antenna body receives, not disturb mutually between the frequency band signals that guarantees any match circuit.
Preferably, described frequency band selection device also comprises: a plurality of output ports, connect described a plurality of match circuit respectively, and be used for exporting the frequency band signals that the match circuit of correspondence is exported to described portable terminal.
Preferably, also comprise switching device shifter between described a plurality of match circuits and output port, the frequency band signals that is used for that described match circuit is exported switches and exports described output port to, and wherein, number of output ports is more than the quantity of described match circuit.
Preferably, described antenna body can receive or launch the signal of four frequency ranges at least, and described frequency band selection device comprises: first match circuit, second match circuit, and four output ports, be respectively applied for output first frequency band signals, second frequency band signals, the 3rd frequency band signals, the 4th frequency band signals, wherein, one end of described choice device is connected with described antenna body, the other end connects first match circuit and second match circuit respectively, and the other end that an end of described switching device shifter connects first match circuit and second match circuit and this switching device shifter respectively connects described four output ports respectively.
Described choice device can be a multiplexer.
Preferably, described a plurality of match circuit is respectively any in T type circuit, pi-network, the L type circuit.
Preferably, described a plurality of output ports are duplexer, and the operating frequency of these duplexers is set at the frequency of corresponding frequency range that match circuit is exported respectively.
Preferably, described switching device shifter is a MUX.
For example, in the antenna of four frequency ranges, the frequency of described first frequency range, second frequency range, the 3rd frequency range and the 4th frequency range is respectively GSM900, GSM1800, GSM850, GSM1900.Certainly, the frequency of described first frequency range, second frequency range, the 3rd frequency range and the 4th frequency range also can be respectively other frequencies.
Described portable terminal can be a kind of in mobile electron cash register and the mobile phone at least.
Advantage of the present utility model comprises at least: under the situation that does not change antenna volume, can realize receiving the function of a plurality of frequency band signals, the for example switching of four frequency ranges, can satisfy a lot of application like this, for example can not change under the situation of apparent size of mobile electron cash dispenser and utilize electronics cash dispenser inner space to realize the antenna of four frequency ranges; Can guarantee performance and electrical quantity characteristic and omni-directional etc. that antenna is good; In different regions, there are enough bandwidth to make the transmitting-receiving frequency range that good radiated radio frequency (RF) performance (TRP) and receptivity (TIS) be arranged; The multiband aerial that the utility model provides is in the work of single resonance point, and therefore, this antenna has high efficiency and high-gain; And, to compare with general multiband aerial, it is simple in structure, exquisite, can realize antenna miniaturization.
Description of drawings
Fig. 1 is the structural representation according to the antenna of an embodiment of the present utility model;
Fig. 2 is the circuit structure diagram according to the antenna of first embodiment of the present utility model;
Fig. 3 is the circuit structure diagram according to the antenna of second embodiment of the present utility model; And
Fig. 4 is the circuit structure diagram according to the antenna of the 3rd embodiment of the present utility model.
Embodiment
With reference to figure 1, it has described the structural representation according to the antenna of an embodiment of the present utility model.Wherein, antenna provided by the utility model comprises antenna body 11 and frequency band selection device 3, and this frequency band selection device 3 is connected with antenna body 11.Because this antenna body 11 can receive the signal of a plurality of frequency ranges, so this frequency band selection device 3 is used for selecting respectively each frequency range of the received a plurality of frequency ranges of antenna body, and is exported by corresponding output port (not marking among the figure) respectively.
With reference to figure 2, it has described the circuit structure diagram according to the antenna of first embodiment of the present utility model.Wherein, described frequency band selection device 3 comprise a plurality of match circuits 31,32 ..., 3n etc.These match circuits are used for each frequency range of the received a plurality of frequency ranges of antenna body 11 is selected, and output respectively.It will be appreciated by those skilled in the art that in a variation example of present embodiment, described frequency band selection device 3 can also comprise and the corresponding output port of a plurality of match circuits, is used for the frequency range output of respectively each match circuit being selected.
Further, it will be understood by those skilled in the art that above-mentioned match circuit is set to some special frequency channel are carried out frequency-selecting, thereby can from a plurality of frequency ranges, this special frequency channel signal be chosen and export to described portable terminal.In the present embodiment, the same time only to the signal of a frequency range of this portable terminal output, promptly has only a match circuit job, and those skilled in the art understand, which can specifically can be achieved by a switching device control output frequency band signals with reference to the embodiment of figure 3, Fig. 4.And in a variation example of present embodiment, described antenna also can be exported the signal of a plurality of frequency ranges simultaneously to described portable terminal, and promptly a plurality of match circuits are all worked, and the frequency band signals of selecting separately to described portable terminal output respectively.Because whether portable terminal can handle a plurality of frequency band signals simultaneously is not the content that emphasis of the present utility model is set forth, and does not repeat them here.
Similarly, it will be appreciated by those skilled in the art that portable terminal can be by antenna transmission signal shown in Figure 2.For example, when portable terminal sends signal with a definite frequency range, this signal will be by determining that with this corresponding match circuit of frequency range is sent to antenna body, is sent by the mode of this antenna body with radio frequency again, those skilled in the art are appreciated that this and implement, and do not repeat them here.
With reference to figure 3, it has described the circuit structure diagram according to the antenna of second embodiment of the present utility model.In the present embodiment, an antenna that can switch four frequency ranges is provided, and it comprises antenna body 11, antenna afterbody 12, choice device 2, first match circuit 31, second match circuit 32, switching device shifter 4 and antenna port 51, antenna port 52, antenna port 53, antenna port 54.Wherein, antenna afterbody 12, be connected with this antenna body 11, and the other end is connected with choice device 2, another end of choice device 2 connects first match circuit 31 and second match circuit 32 respectively, first match circuit 31 and second match circuit 32 are connected with switching device shifter 4 respectively again, and the other end of switching device shifter 4 connects antenna port 51, antenna port 52, antenna port 53, antenna port 54 respectively.
With reference to figure 3, antenna body 11 is used to receive or launch first frequency range that this dual-band antenna sets and the signal of second frequency range; Choice device 2 is used for two frequency ranges that this dual-band antenna sets are isolated respectively, is not subjected to the interference of another frequency band signals to guarantee any frequency band signals; First match circuit 31 is used for the resonance point of antenna is carried out migration processing, so that be enhanced or be reduced to the frequency of first frequency range and the 3rd frequency range through the band frequency of described first match circuit output; Second match circuit 32 is used for the resonance point of antenna is carried out migration processing, so that be enhanced or be reduced to the frequency of second frequency range and the 4th frequency range through the band frequency of described second match circuit output; Switching device shifter 4 is used for the frequency range of described first match circuit, the output of second match circuit is switched to four frequency ranges; 51,52,53,54 operating frequencies that are set at separately separately of four antenna ports, the antenna that the utility model provides is respectively applied for the signal that inputs or outputs first frequency range, second frequency range, the 3rd frequency range and the 4th frequency range, so that can provide four frequency ranges.Be appreciated that above-mentioned choice device 2, first match circuit 31, second match circuit 32 and switching device shifter 4 have constituted the frequency band selection device that the utility model is set forth.
In the present embodiment, above-mentioned choice device 2 is multiplexers.Above-mentioned match circuit 31,32 is a T type circuit.Antenna port 51,52,53,54 all is a duplexer.And it will be understood by those skilled in the art that above-mentioned each equipment, circuit have multiple implementation.For example, above-mentioned choice device 2 can be the Related product that ADI company produces, and match circuit 31,32 also can be pi-network, L type circuit or other circuit.Those skilled in the art are appreciated that this and implement, so do not give unnecessary details at this.
In the present embodiment, above-mentioned match circuit 31 is T type circuit, and this circuit is the series circuit of an inductance 311 and a parallel circuits, and this parallel circuits is composed in parallel by inductance 312 and electric capacity 313, wherein, an end of an end ground connection of inductance 312, electric capacity 313 is connected to described switching device shifter 4.Those skilled in the art understand, above-mentioned match circuit 31 is used for the resonance point of antenna is carried out migration processing, so that be enhanced or be reduced to the frequency of first frequency range and the 3rd frequency range through the band frequency of described first match circuit output, therefore, the specification of above-mentioned inductance 311, inductance 312 and electric capacity 313 should satisfy the requirement of carrying out migration processing.It will be appreciated by those skilled in the art that according to no enforcement needs the specification of inductance 311, inductance 312 and electric capacity 313 can be inequality, those skilled in the art can debug by the analogue system that Ansoft company produces and obtain corresponding specification.
In the present embodiment, for need of work, the frequency of described first frequency range, second frequency range, the 3rd frequency range and the 4th frequency range is respectively GSM900, GSM1800, GSM850, GSM1900.And it will be appreciated by those skilled in the art that in the variation example of present embodiment described four frequency ranges also can be respectively other frequencies, for example frequency is used in other communications, does not give unnecessary details at this.
With reference to figure 3, it will be appreciated by those skilled in the art that when antenna operate as normal shown in Figure 3 for example be operated in the operating frequency GSM850 of antenna port 51, then this moment, the duplexer of these antenna port 51 correspondences is opened, the corresponding duplexers of other 3 ports cut out.Then when this antenna receives a signal from the outside, this signal at first device selected 2 is selected according to the frequency range of signal, if belong to the scope of first frequency range, then carry out the resonance point skew by first match circuit 31, and and then by being transferred to duplexer 51 behind the switching device shifter 4.Then, the RX port 512 of duplexer 51 carries out filtering to the signal that receives, and is input to LNA (low noise amplifier) then and amplifies, thereby the signal of this frequency range is inputed to corresponding other equipment.Similarly, when outwards launching a signal by antenna port 51, at first 511 output signals PA (power amplifier) of the TX port of duplexer 51 are carried out after the filtering ANT port transmission from duplexer 51 to switching device shifter 4, transfer to antenna body 11 through switching device shifter 4, match circuit, choice device 2 again, thereby send through antenna body 11.
Again with reference to figure 3, one at present embodiment changes in the example, above-mentioned antenna body 11 can be achieved on the basis of an existing dual-band antenna, for example for the dual-band antenna of a mobile electron cash register, can increase the copper pool in the high band and the low frequency frequency range of this dual-band antenna, thereby make this dual-band antenna of being transformed can cover the signal of four frequency ranges, and high-quality signal can be provided.It will be appreciated by those skilled in the art that such transformation can't influence the volume of former dual-band antenna, thereby realized on dual-band antenna, realizing four purposes of switching frequently.
With reference to figure 4, it has described the circuit structure diagram according to the antenna of the 3rd embodiment of the present utility model.In the present embodiment, no longer be confined to the dual-band antenna of four frequency ranges of the shown switching of above-mentioned Fig. 3, but extend to more frequency range.In the present embodiment, the band limits that described antenna body 11 can receive is many more, therefore, and through realizing the function of three frequency ranges after the processing of choice device 2.Then, pass through match circuit 31,32,33 again, and switching device shifter 4 can produce six frequency ranges, and realize the function of six frequency ranges respectively through antenna port 51～56.Because those skilled in the art can realize the 3rd embodiment in conjunction with the description to above-mentioned second embodiment, so do not give unnecessary details at this.But simple description by the 3rd embodiment, it will be appreciated by those skilled in the art that, summary of the invention provided by the utility model is not limited to the dual-band antenna of four frequency ranges, can realize more variation according to the utility model content, thereby make that using antenna of the present utility model can support more frequency range.
It will be appreciated by those skilled in the art that the antenna that the utility model provides can be used in mobile electron cash register or the mobile phone.
In another embodiment of the present utility model, a kind of mobile electron cash register also is provided, this electronic cash register comprises the above-mentioned dual-band antenna that can realize four frequency ranges switchings shown in Figure 3.Similarly, according to another embodiment of the present utility model, also provide a kind of mobile phone, this mobile phone also comprises the above-mentioned dual-band antenna that can realize four frequency ranges switchings shown in Figure 3.
Although the utility model is illustrated with aforesaid preferred embodiment, but can be appreciated that expressly, any technical staff that this field is familiar with, enlightenment according to design philosophy of the present utility model, concrete summary of the invention and embodiment, should various changes and adjustment, and by these changes with adjust resulting new content and should be contained by the utility model content.
Claims (10)
1. multiband aerial that is used for portable terminal comprises:
Antenna body can receive or launch the pairing frequency band signals of these a plurality of frequency ranges,
It is characterized in that, also comprise frequency band selection device, be used for selecting respectively each frequency range of described a plurality of frequency ranges.
2. antenna according to claim 1, wherein, described frequency band selection device comprises a plurality of match circuits, is respectively applied for the frequency band signals that described antenna body is received and carries out frequency-selecting, and export the frequency range of determining after the frequency-selecting separately respectively.
3. antenna according to claim 2, wherein, described frequency band selection device also comprises:
Choice device is used for of described a plurality of match circuits is handled and exported to the frequency band signals that antenna body receives, not disturb mutually between the frequency band signals that guarantees any match circuit.
4. according to claim 2 or 3 described antennas, wherein, described frequency band selection device also comprises:
A plurality of output ports connect described a plurality of match circuit respectively, are used for exporting the frequency band signals that the match circuit of correspondence is exported to described portable terminal.
5. antenna according to claim 4, wherein, between described a plurality of match circuits and output port, also comprise switching device shifter, be used for the frequency band signals switching that described match circuit is exported and export described output port to, wherein, number of output ports is more than the quantity of described match circuit.
6. antenna according to claim 5, wherein, described antenna body can receive or launch the signal of four frequency ranges at least, and described frequency band selection device comprises:
First match circuit, second match circuit, and
Four output ports are respectively applied for output first frequency band signals, second frequency band signals, the 3rd frequency band signals, the 4th frequency band signals,
One end of described choice device is connected with described antenna body, the other end connects first match circuit and second match circuit respectively, and the other end that an end of described switching device shifter connects first match circuit and second match circuit and this switching device shifter respectively connects described four output ports respectively.
7. according to claim 3 or 6 described antennas, wherein, described choice device is a multiplexer.
8. according to claim 2 or 3 or 5 or 6 described antennas, wherein, described match circuit is any in T type circuit, pi-network, the L type circuit.
9. antenna according to claim 4, wherein, described output port is a duplexer, and the operating frequency of this duplexer is set at the frequency of corresponding frequency range that match circuit is exported respectively.
10. according to claim 1 or 2 or 3 or 5 or 6 or 9 described antennas, wherein, described portable terminal comprises a kind of in mobile electron cash register and the mobile phone at least.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200481375U CN200990608Y (en) | 2006-11-24 | 2006-11-24 | Multi-frequency channel antenna for mobile terminal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200481375U CN200990608Y (en) | 2006-11-24 | 2006-11-24 | Multi-frequency channel antenna for mobile terminal |
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| CN200990608Y true CN200990608Y (en) | 2007-12-12 |
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| CNU2006200481375U Expired - Fee Related CN200990608Y (en) | 2006-11-24 | 2006-11-24 | Multi-frequency channel antenna for mobile terminal |
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| CN102122969A (en) * | 2010-12-30 | 2011-07-13 | 意法·爱立信半导体（北京）有限公司 | Mobile terminal and method for improving antenna matching performance of multiband mobile terminal |
| CN102136847A (en) * | 2010-01-26 | 2011-07-27 | 宏达国际电子股份有限公司 | Wideband antenna matching device and method thereof |
| CN102215278A (en) * | 2010-07-30 | 2011-10-12 | 惠州Tcl移动通信有限公司 | Mobile terminal integrating two antennae into a whole and antenna control device thereof |
| CN102263328A (en) * | 2011-06-07 | 2011-11-30 | 华为技术有限公司 | Multifrequency antenna remote control device and multifrequency antenna system |
| WO2012009906A1 (en) * | 2010-07-23 | 2012-01-26 | 中兴通讯股份有限公司 | Mobile phone television terminal and realization method thereof |
| WO2012151906A1 (en) * | 2011-09-14 | 2012-11-15 | 中兴通讯股份有限公司 | Mobile terminal and method for handling mobile terminal |
| CN103107827A (en) * | 2011-11-15 | 2013-05-15 | 纬创资通股份有限公司 | Mobile communication device and wireless communication signal adjusting method thereof |
| CN103326112A (en) * | 2012-03-23 | 2013-09-25 | 联想(北京)有限公司 | Antenna device and terminal equipment |
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| CN101604980B (en) * | 2009-06-24 | 2014-02-19 | 中兴通讯股份有限公司 | Method for realizing frequency band match of mobile terminal, mobile terminal and main board thereof |
| CN105490686A (en) * | 2015-11-25 | 2016-04-13 | 广东欧珀移动通信有限公司 | Method and system for improving antenna performance of mobile terminal |
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| CN107947822A (en) * | 2016-10-13 | 2018-04-20 | 中兴通讯股份有限公司 | A kind of antenna-matching circuit, the system of selection of frequency range and device |
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| CN112286845A (en) * | 2020-10-30 | 2021-01-29 | 重庆金美通信有限责任公司 | Transmission line switching system supporting multiple devices and multiple interfaces |
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| CN101604980B (en) * | 2009-06-24 | 2014-02-19 | 中兴通讯股份有限公司 | Method for realizing frequency band match of mobile terminal, mobile terminal and main board thereof |
| CN102136847A (en) * | 2010-01-26 | 2011-07-27 | 宏达国际电子股份有限公司 | Wideband antenna matching device and method thereof |
| WO2012009906A1 (en) * | 2010-07-23 | 2012-01-26 | 中兴通讯股份有限公司 | Mobile phone television terminal and realization method thereof |
| CN102215278A (en) * | 2010-07-30 | 2011-10-12 | 惠州Tcl移动通信有限公司 | Mobile terminal integrating two antennae into a whole and antenna control device thereof |
| WO2012089138A1 (en) * | 2010-12-30 | 2012-07-05 | 意法·爱立信半导体（北京）有限公司 | Method and mobile terminal for improving antenna matching performance of multi-band mobile terminal |
| CN102122969A (en) * | 2010-12-30 | 2011-07-13 | 意法·爱立信半导体（北京）有限公司 | Mobile terminal and method for improving antenna matching performance of multiband mobile terminal |
| EP2661031A4 (en) * | 2010-12-30 | 2014-06-11 | St ericsson semiconductor beijing co ltd | Method and mobile terminal for improving antenna matching performance of multi-band mobile terminal |
| EP2661031A1 (en) * | 2010-12-30 | 2013-11-06 | ST-Ericsson Semiconductor (Beijing) Co., Ltd. | Method and mobile terminal for improving antenna matching performance of multi-band mobile terminal |
| CN102263328A (en) * | 2011-06-07 | 2011-11-30 | 华为技术有限公司 | Multifrequency antenna remote control device and multifrequency antenna system |
| CN102263328B (en) * | 2011-06-07 | 2014-09-03 | 华为技术有限公司 | Multifrequency antenna remote control device and multifrequency antenna system |
| WO2012151906A1 (en) * | 2011-09-14 | 2012-11-15 | 中兴通讯股份有限公司 | Mobile terminal and method for handling mobile terminal |
| CN103107827A (en) * | 2011-11-15 | 2013-05-15 | 纬创资通股份有限公司 | Mobile communication device and wireless communication signal adjusting method thereof |
| CN103326112A (en) * | 2012-03-23 | 2013-09-25 | 联想(北京)有限公司 | Antenna device and terminal equipment |
| CN103326112B (en) * | 2012-03-23 | 2016-08-17 | 联想(北京)有限公司 | Antenna assembly and terminal unit |
| WO2013170826A2 (en) * | 2012-10-09 | 2013-11-21 | 中兴通讯股份有限公司 | Multiband antenna tuned circuit and wireless terminal |
| WO2013170826A3 (en) * | 2012-10-09 | 2014-01-30 | 中兴通讯股份有限公司 | Multiband antenna tuned circuit and wireless terminal |
| CN105490686B (en) * | 2015-11-25 | 2018-03-06 | 广东欧珀移动通信有限公司 | Lift the method and system of mobile terminal antenna performance |
| CN105490686A (en) * | 2015-11-25 | 2016-04-13 | 广东欧珀移动通信有限公司 | Method and system for improving antenna performance of mobile terminal |
| CN105959016A (en) * | 2016-04-20 | 2016-09-21 | 广东欧珀移动通信有限公司 | Antenna control method and device and terminal equipment |
| CN105959016B (en) * | 2016-04-20 | 2018-09-11 | 广东欧珀移动通信有限公司 | Method of controlling antenna, device and terminal device |
| CN107947822A (en) * | 2016-10-13 | 2018-04-20 | 中兴通讯股份有限公司 | A kind of antenna-matching circuit, the system of selection of frequency range and device |
| WO2020133514A1 (en) * | 2018-12-29 | 2020-07-02 | 华为技术有限公司 | Multi-band radio frequency front-end device, multi-band receiver, and multi-band transmitter |
| US11683054B2 (en) | 2018-12-29 | 2023-06-20 | Huawei Technologies Co., Ltd. | Multi-band radio frequency front-end device, multi-band receiver, and multi-band transmitter |
| CN112286845A (en) * | 2020-10-30 | 2021-01-29 | 重庆金美通信有限责任公司 | Transmission line switching system supporting multiple devices and multiple interfaces |
| CN112286845B (en) * | 2020-10-30 | 2023-06-09 | 重庆金美通信有限责任公司 | Transmission line switching system supporting multiple devices and multiple interfaces |
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