CN101604993B - Multiaerial system and method for radiating radio frequency signals - Google Patents
Multiaerial system and method for radiating radio frequency signals Download PDFInfo
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Abstract
The invention discloses a multiaerial system which comprises a level signal generator, at least one filter unit group, a converter and at least one radiation unit, wherein the level signal generator is used for computing and obtaining first level signals according to channel information of a network card; the filter unit group is connected with the level signal generator and is used for receiving the first level signals and filtering interference signals in the first level signals to obtain second level signals; the converter is connected with the at least one filter unit group and is used for converting the second level signals into control signals; and the radiation unit is respectively connected with the network card and the converter, and is used for radiating radio frequency signals of the network card according to the control signals. The invention also discloses a method for correspondingly radiating the radio frequency signals, the level signals are filtered and converted into the control signals, and the radio frequency signals are radiated according the control signals. The invention can change the radiation direction of an antenna without being limited by the number of an antenna unit, reduces the control signal wire, and increases the gain to the radiated radio frequency signals.
Description
Technical field
The present invention relates to the telecommunications field of antenna, particularly the method for a kind of multiaerial system and radiated radio frequency (RF) signal.
Background technology
The present portable terminal multiaerial systems of fixing that adopt more, be that the antenna element directional diagram is always towards upper half-space, left half space or right half space, and the directional diagram of antenna element is changeless, this causes and uses the radiation beam pattern kind of multiaerial system abundant not, can't satisfy multiple-input and multiple-output (MIMO, Multiple-Input Multiple-Out-put) communication equipment and under various incoming waves, all will reach the demand of optimal communication effect.
Present multiaerial system mainly comprises: many orders antenna, multiband antenna switch array, class eight order antennas and with the restructural layered transducer elements of electro-magnetic bandgap (EBG, Electromagnetic Band Gap) structure.Adopt these multiaerial systems can effectively receive several arrival bearings' demand, it is selected but the element pattern of these multiaerial systems receives arrival bearing, can not change, the communication environment very concentrated for the very discrete communication environment of arrival bearing and arrival bearing is difficult to take into account.In realizing process of the present invention, the inventor finds that there are the following problems at least in the prior art:
1) in the multiaerial system that existing many orders antenna forms, the order antenna needs the space of a wavelength at least more than one, about tens centimetres, and the locus of the unit that can fix up an aerial wire on the portable terminal is limited, order antenna more than one to two only can be installed, thereby the incoming wave kind that whole multiaerial system can be received is restricted, and can't increase the aerial radiation gain; Each many orders antenna needs the connection control signal line to control, and has the line-to-line crosstalk problem; And when in such as portable terminals such as notebooks, adopting multiaerial system, need all control lines by the rotating shaft of notebook screen, control line and radio frequency cable are crossed and are difficult at most by the rotating shaft of notebook screen.
2) the existing multiaerial system that is formed by many antennas and switch arrays, the mode that adopts a plurality of antenna elements to be combined with switch arrays, select a part of antenna element radiated radio frequency (RF) signal according to arrival bearing during communication, and the locus of the unit that can fix up an aerial wire on the portable terminal is limited, a minority antenna element only can be installed, the arrival bearing that whole multiaerial system can receive is restricted, and can't increase antenna gain; In addition, need between antenna element and the switch arrays to realize switching over a large amount of control signal wires, have the line-to-line crosstalk problem, reach control line and radio frequency cable and cross the problem that is difficult at most by the rotating shaft of notebook screen.
3) multiaerial system of existing class eight order antennas composition, an antenna element battle array of class eight order antennas size is at least a wavelength of radiated wave, about tens centimetres, and the locus of the unit battle array that can fix up an aerial wire on the portable terminal is limited, one to two class eight order antenna only can be installed, thereby the incoming wave kind that whole multiaerial system can be received is restricted, and can't increase antenna gain; Class eight order antennas are single-frequency narrow-band antennas, can not satisfy the demand of multiband.Each class eight order antenna needs the connection control signal line to control, and exists line-to-line crosstalk problem and control line and radio frequency cable to cross the problem that is difficult at most by the rotating shaft of notebook screen.
4) multiaerial system that forms of existing restructural layered transducer elements with the EBG structure can be improved the radiance of antenna and the restructural of realizing antenna pattern.But the directional diagram that uses the antenna of EBG remains half space, and still has the too much problem of control signal wire.
Summary of the invention
In view of this, the embodiment of the invention provides the method for a kind of multiaerial system and radiated radio frequency (RF) signal, can change the aerial radiation direction, reduces control signal wire.
For achieving the above object, the technical scheme of the method for a kind of multiaerial system of the present invention and radiated radio frequency (RF) signal is achieved in that
A kind of multiaerial system comprises:
Level signal generator is used for according to the channel information from network interface card, calculates and obtains the first level signal;
At least one filtering unit group connects described level signal generator, is used for receiving described the first level signal, and filters the interference signal in described the first level signal, obtains the second electrical level signal;
Transducer connects described at least one filtering unit group, is used for the second electrical level signal is converted to control signal;
At least one radiating element is connected respectively with described network interface card, transducer, is used for according to the radiofrequency signal of described control signal radiation from described network interface card.
Each described radiating element comprises:
The radiofrequency signal selector switch is used for according to described control signal conducting or disconnection, transmits the radiofrequency signal that transmits from network interface card;
At least one antenna element connects described radiofrequency signal selector switch, is used for according to described control signal, to the radiofrequency signal of corresponding direction radiation reception.
Each described filtering unit group comprises the first filter unit and the second filter unit:
Described the first filter unit comprises:
The first low pass filter connects described level signal generator, is used for receiving and filtering the high-frequency interferencing signal of described the first level signal, obtains three level signal;
The first radio frequency ground capacity connects described the first low pass filter and ground connection, is used for filtering the high-frequency interferencing signal of described three level signal, obtains the 4th level signal;
Described the second filter unit comprises:
The second radio frequency ground capacity connects described the first radio frequency ground capacity and ground connection, is used for receiving and filtering the high-frequency interferencing signal of described the 4th level signal, obtains the 5th level signal;
The second low pass filter connects described the second radio frequency ground capacity, is used for filtering the high-frequency interferencing signal of described the 5th level signal, obtains the second electrical level signal, and described second electrical level signal is sent to transducer.
Each described antenna element comprises:
Antenna connects described radiofrequency signal selector switch, is used for the radiated radio frequency (RF) signal;
At least one radio-frequency (RF) switch connects described antenna, is used for according to described control signal conducting or disconnection;
At least one paster connects described radio-frequency (RF) switch, is used for changing the resonance frequency of antenna.
Described radiating element is corresponding one by one with described filtering unit group.
Described antenna element according to control signal as radiator or reverser or director.
The patch shape of described antenna element, size, number are identical or different.
Described channel information comprises channel information, radiofrequency signal power, frequency departure, phase place at least.
A kind of method of radiated radio frequency (RF) signal comprises:
According to the channel information from network interface card, calculate and obtain the first level signal;
Receive described the first level signal, and filter the interference signal in described the first level signal, obtain the second electrical level signal;
The second electrical level signal is converted to control signal;
According to the radiofrequency signal of described control signal radiation from described network interface card.
Interference signal in described the first level signal of described filtration comprises:
Described the first level signal successively by the first filter unit, the second filter unit, is filtered high-frequency interferencing signal wherein, obtain described second electrical level signal.
Describedly comprise according to the radiofrequency signal of described control signal radiation from described network interface card:
According to described control signal, the corresponding antenna element of conducting will send to antenna element from the radiofrequency signal that network interface card transmits;
Described antenna element is according to described control signal, to corresponding direction radiated radio frequency (RF) signal.
Described antenna element comprises to corresponding direction radiated radio frequency (RF) signal according to described control signal:
According to described control signal conducting or cut off being electrically connected of paster and antenna;
The sky alignment corresponding direction radiated radio frequency (RF) signal of radiofrequency signal selector switch conducting, radiofrequency signal selector switch not the antenna of conducting as director, reverser or do not work.
Embodiment in the technique scheme has following advantage or beneficial effect:
1) embodiments of the invention use many antenna selecting systems, choose a part of antenna element as radiator, not selected antenna element is as reflector or director, increase antenna gain, enrich the directional diagram subset of multiaerial system, relatively concentrate arrival bearing especially, better reception also arranged in the high spatial correlation channel.
2) embodiments of the invention transmit level signal with the outer conductor of coaxial cable as control signal wire, adopt transducer switching levels signal and control signal, do not need independent control signal wire between network interface card and transducer; And coaxial cable is easier to pass the liquid crystal display screen rotating shaft, was adapted at using on the portable terminals such as notebook.
3) embodiments of the invention have reconfigurable multiple directional diagram, and received RF signal better under the communication environment that the very discrete communication environment of arrival bearing and arrival bearing relatively concentrate is applicable to various indoor and outdoor surroundingses, strong adaptability.
4) embodiments of the invention use selectable antenna element to be multiplexed with reflector and director, have strengthened the radiofrequency signal radiation, have dwindled the size of antenna element, are more suitable for the portable terminal needs.
Description of drawings
Fig. 1 is the structure chart of an embodiment of multiaerial system of the present invention;
Fig. 2 is the schematic diagram of the filtering unit group of an embodiment of multiaerial system of the present invention;
Fig. 3 is the antenna element schematic diagram of an embodiment of multiaerial system of the present invention;
Fig. 4 is the antenna element three-dimensional effect diagram of an embodiment of multiaerial system of the present invention;
Fig. 5 is the overall structure figure of an embodiment of multiaerial system of the present invention;
Fig. 6 is the three-dimensional effect diagram of an embodiment of multiaerial system of the present invention;
Fig. 7 is the structural representation of the antenna element of another embodiment of multiaerial system of the present invention;
Fig. 8 is the flow chart of an embodiment of radiated radio frequency (RF) signal method of the present invention.
Embodiment
Basic thought of the present invention is: adopt a plurality of antenna elements, can process simultaneously the multi-channel rf signal, with work antenna element as radiator, when having antenna element to leave unused, can be used as reverser or director, strengthen the radiofrequency signal of corresponding radiator, guarantee better communication quality.
The structured flowchart of an embodiment of multiaerial system of the present invention as shown in Figure 1, this system comprises:
Level signal generator is used for according to the channel information from network interface card, calculates and obtains the first level signal;
At least one filtering unit group connects described level signal generator, is used for receiving described the first level signal, and filters the interference signal in described the first level signal, obtains the second electrical level signal;
Transducer connects described at least one filtering unit group, is used for the second electrical level signal is converted to control signal;
At least one radiating element is connected respectively with described network interface card, transducer, is used for according to the radiofrequency signal of described control signal radiation from described network interface card.
Transducer is connected with control signal wire with each radiating element, and transducer is connected with control signal wire with filtering unit group, and each radiating element connects network interface card by radio frequency cable, and channel information mainly comprises phase place, frequency departure, phase place of channel information, radiofrequency signal etc.
Each filtering unit group comprises the first filter unit and the second filter unit, among Fig. 1 shown in dotted line frame 10 among Fig. 1, the first filter unit is filter unit A1, the second filter unit is filter unit B1, and as shown in Figure 2, filter unit A1 is connected by radio frequency cable 101 with filter unit B1.
Filter unit A1 comprises:
The first low pass filter 1031 connects the level signal generator (not shown), is used for receiving and filtering the high-frequency interferencing signal of described the first level signal, obtains three level signal;
The first radio frequency ground capacity 1041 connects the first low pass filter 1031 and ground connection, is used for filtering the high-frequency interferencing signal of described three level signal, obtains the 4th level signal;
Filter unit B1 comprises:
The second radio frequency ground capacity 1042 connects the first radio frequency ground capacity 1041 and ground connection, is used for receiving and filtering the high-frequency interferencing signal of described the 4th level signal, obtains the 5th level signal;
The second low pass filter 1032 connects the second radio frequency ground capacity 1042, is used for filtering the high-frequency interferencing signal of described the 5th level signal, obtains the second electrical level signal, and described second electrical level signal is sent to transducer.
Each radiating element comprises:
The radiofrequency signal selector switch is used for according to described control signal conducting or disconnection, transmits the radiofrequency signal that transmits from network interface card;
At least one antenna element connects the radiofrequency signal selector switch, is used for the control signal that sends according to transducer, the radiofrequency signal that transmits from the radiofrequency signal selector switch to corresponding direction radiation.
Wherein, the radiofrequency signal selector switch connects network interface card by radio frequency cable, receives the radiofrequency signal that transmits from network interface card; The radiofrequency signal selector switch connects transducer by control signal wire; Antenna element connects the radiofrequency signal selector switch by the radio frequency connecting line, connects transducer by control signal wire.
Antenna unit structure in the radiating element comprises as shown in Figure 3:
Antenna connects the radiofrequency signal selector switch, is used for the radiated radio frequency (RF) signal;
At least one radio-frequency (RF) switch connects antenna, is used for according to described control signal conducting or disconnection;
At least one paster connects the respective radio-frequency switch, is used for changing the resonance frequency of antenna.
Wherein, radio-frequency (RF) switch connects transducer by control signal wire, according to the control signal conducting of transducer or cut off being electrically connected of paster and antenna.
The stereoeffect of antenna element as shown in Figure 4, take 2 antenna elements as example: antenna element 1 and antenna element 2 lay respectively at the portable terminal edge, the paster of antenna element 1 401 connects radio-frequency (RF) switch 411, the paster 402 of antenna element 2 connects radio-frequency (RF) switch 412.
Each antenna element is controlled the total length of paster according to the radio-frequency (RF) switch of control signal conducting inside, so that each antenna element can be used as radiator, or as reverser, or as director.So-called radiator refers to the antenna element according to control signal radiated radio frequency (RF) signal.So-called reverser when referring to according to control signal not as radiator, strengthens the antenna element of radiofrequency signal to the opposite direction of radiator.When so-called director refers to according to control signal not as radiator, to the antenna element of the equidirectional enhancing radiofrequency signal of radiator.Multiaerial system may receive the radiofrequency signal from a plurality of direction incidents of same radiation source at synchronization, and the antenna element of choice direction figure the best is as radiator; If the radiofrequency signal that synchronization receives is from the identical radiofrequency signal radiation source of a plurality of frequencies, and the number of these radiation sources is less than the number of radiating element, then only choose the partial radiation unit as radiator, do not have that not selected antenna element can be used as reverser or director in the antenna element in the selected radiating element, the selected radiating element, to reach better communication efficiency.Radiating element can be corresponding one by one with filtering unit group, perhaps, the corresponding a plurality of filtering unit group of each radiating element, two filter units of each filtering unit group distribute in the coaxial cable bilateral symmetry.
According to user's request, can give every channel information a weight coefficient, and then calculate the radiation event that the current multi-antenna system needs, i.e. the break-make situation of each radiofrequency signal selector switch and radio-frequency (RF) switch.Level signal generator is according to this mode of obtaining radiation event, by the channel information that receives, the level signal that calculating and sending gives each radiofrequency signal selector switch and radio-frequency (RF) switch to need, arrive transducer through filtering unit group, each level signal is converted to digital signal sends to each radiofrequency signal selector switch, radio-frequency (RF) switch, thus the radiation event of definite multiaerial system.
The radiofrequency signal of the output of MIMO network interface card is sent to the radiofrequency signal selector switch by radio frequency cable, and each radiofrequency signal selector switch selects certain antenna element to carry out radiation under the driving of control signal; Not selected antenna element can be used as reverser or director by corresponding radio-frequency (RF) switch control or does not work.
The overall structure of an embodiment of multiaerial system as shown in Figure 5, comprise radiating element 1 and radiating element 2 among this embodiment, radiating element 1 comprises radiofrequency signal selector switch 1, antenna element 1 and antenna element 2, and radiating element 2 comprises radiofrequency signal selector switch 2, antenna element 3 and antenna element 4.Antenna element 1 inside is paster 1, radio-frequency (RF) switch 1 and antenna 1, other antenna element the like; The radiofrequency signal selector switch is single-pole double-throw switch (SPDT), and radio-frequency (RF) switch is single-pole single-throw switch (SPST); The radio frequency cable that connects network interface card and radiofrequency signal selector switch is coaxial cable, and the radio frequency connecting line that connects each radiofrequency signal selector switch and respective antenna unit is microstrip feed line.
Among the embodiment shown in Figure 5, with antenna element 1 to the antenna element 4 of radiating element 1 and radiating element 2 be distributed in portable terminal around, stereoeffect as shown in Figure 6, the distance between each antenna element is set as required.Antenna element 1 connects radiofrequency signal selector switch 1 (not shown) by microstrip feed line 641, antenna element 2 connects radiofrequency signal selector switch 1 (not shown) by microstrip feed line 642, antenna element 3 connects radiofrequency signal selector switch 2 (not shown)s by microstrip feed line 643, and antenna element 4 connects radiofrequency signal selector switch 2 (not shown)s by microstrip feed line 644.A display part among antenna holder 630 figure, antenna holder 630 connect the reference ground of each antenna element inside antenna.Antenna element is during as reverser or director, and the effect of gain is different.
The present embodiment structure is little, can process simultaneously the multi-channel rf signal, by the gain of reverser or director, better guarantees communication quality.
Antenna element is during as reverser or director, and as required, inner radio-frequency (RF) switch can conducting or disconnection.Design the resonance frequency that different patch shape, size, number can change respective antenna.As shown in Figure 7, in the inner number that increases radio-frequency (RF) switch and paster of antenna element, form the array of radio-frequency (RF) switch and paster, each radio-frequency (RF) switch connects transducer, the corresponding paster of conducting as required, the total length of paster in the antenna element be can adjust, so that the same antenna has multiple resonance frequency, director or reverser can be used as.Adjusting distance between each antenna element also can affect the effect of reverser or director.The radio frequency cable that connects network interface card and radiofrequency signal selector switch can also be microstrip feed line, strip line, parallel wire, fin-shaped line; The radio frequency connecting line that connects each radiofrequency signal selector switch and respective antenna unit can also be coaxial cable, strip line, parallel wire, fin-shaped line.
Take multiaerial system shown in Figure 5 as example, need to suppose antenna element 1 as director non-radiating radiofrequency signal, antenna element 2 is wanted radiated radio frequency (RF) signal a, and antenna element 3 is as reverser non-radiating radiofrequency signal, and antenna element 4 is wanted radiated radio frequency (RF) signal b.The flow process of an embodiment of the method for radiated radio frequency (RF) signal of the present invention comprises as shown in Figure 8:
Network interface card sends radiofrequency signal a, radiofrequency signal b by coaxial cable 1, coaxial cable 2 to radiofrequency signal selector switch 1, radiofrequency signal selector switch 2 respectively; Network interface card is to the level signal generator channel information, level signal generator is according to the computational methods of channel information and setting, calculating and sending is sent the first level signal, and the first level signal comprises: level signal S1, level signal S2, level signal S3, level signal S4, level signal S5 and level signal S6.
Described the first level signal is passed through the first filter unit, the second filter unit successively, filter high-frequency interferencing signal wherein, obtain described second electrical level signal, the second electrical level signal comprises level signal S12, level signal S22, level signal S32, level signal S42, level signal S52, level signal S62.Wherein, level signal S1, level signal S3, level signal S4 obtain level signal S12, level signal S32, level signal S42 successively by filter unit A1, the outer conductor of coaxial cable 1, filter unit B1; Level signal S2, level signal S5, level signal S6 obtain level signal S22, level signal S52, level signal S62 successively by filter unit A2, the outer conductor of coaxial cable 2, filter unit B2.
Transducer is converted to corresponding control signal C1, control signal C2, control signal C3, control signal C4, control signal C5, control signal C6 with level signal S12 to level signal S62; Radio-frequency (RF) switch in radiofrequency signal selector switch 1, radiofrequency signal selector switch 2, the antenna element 1 to 4 sends respectively.
According to control signal, the corresponding antenna element of conducting will send to antenna element from the radiofrequency signal that network interface card transmits; Antenna element is according to control signal, to corresponding direction radiated radio frequency (RF) signal.According to described control signal conducting or cut off being electrically connected of paster and antenna; The sky alignment corresponding direction radiated radio frequency (RF) signal of radiofrequency signal selector switch conducting, radiofrequency signal selector switch not the antenna of conducting as director, reverser or do not work.
Specifically: radiofrequency signal selector switch 1 sends radiofrequency signal a according to control signal C1 to antenna element 2; Radiofrequency signal selector switch 2 sends radiofrequency signal b according to control signal C2 to antenna element 4; The radio-frequency (RF) switch 1 of antenna element 1 receives control signal C3, and conducting paster 1 and antenna 1 make the relative radiofrequency signal a of self resonance frequency more on the low side, the non-radiating radiofrequency signal; The radio-frequency (RF) switch 2 of antenna element 2 receives control signal C4, disconnects paster 2 and antenna 2, received RF signal a and radiation; The radio-frequency (RF) switch 3 of antenna element 3 receives control signal C5, disconnects paster 3 and antenna 3, makes the relative radiofrequency signal b of self resonance frequency higher, the non-radiating radiofrequency signal; The radio-frequency (RF) switch 4 of antenna element 4 receives control signal C6, conducting paster 4 and antenna 4, received RF signal b and radiation.
The above is preferred embodiment of the present invention only, is not for limiting protection scope of the present invention.
Claims (12)
1. a multiaerial system is characterized in that, comprising:
Level signal generator is used for according to the channel information from network interface card, calculates and obtains the first level signal;
At least one filtering unit group connects described level signal generator, is used for receiving described the first level signal, and filters the interference signal in described the first level signal, obtains the second electrical level signal;
Transducer connects described at least one filtering unit group, is used for the second electrical level signal is converted to control signal;
At least one radiating element is connected respectively with described network interface card, transducer, is used for according to the radiofrequency signal of described control signal radiation from described network interface card.
2. multiaerial system according to claim 1 is characterized in that, each described radiating element comprises:
The radiofrequency signal selector switch is used for according to described control signal conducting or disconnection, transmits the radiofrequency signal that transmits from network interface card;
At least one antenna element connects described radiofrequency signal selector switch, is used for according to described control signal, to the radiofrequency signal of corresponding direction radiation reception.
3. multiaerial system according to claim 1 and 2 is characterized in that, each described filtering unit group comprises the first filter unit and the second filter unit:
Described the first filter unit comprises:
The first low pass filter connects described level signal generator, is used for receiving and filtering the high-frequency interferencing signal of described the first level signal, obtains three level signal;
The first radio frequency ground capacity connects described the first low pass filter and ground connection, is used for filtering the high-frequency interferencing signal of described three level signal, obtains the 4th level signal;
Described the second filter unit comprises:
The second radio frequency ground capacity connects described the first radio frequency ground capacity and ground connection, is used for receiving and filtering the high-frequency interferencing signal of described the 4th level signal, obtains the 5th level signal;
The second low pass filter connects described the second radio frequency ground capacity, is used for filtering the high-frequency interferencing signal of described the 5th level signal, obtains the second electrical level signal, and described second electrical level signal is sent to transducer.
4. multiaerial system according to claim 2 is characterized in that, each described antenna element comprises:
Antenna connects described radiofrequency signal selector switch, is used for the radiated radio frequency (RF) signal;
At least one radio-frequency (RF) switch connects described antenna, is used for according to described control signal conducting or disconnection;
At least one paster connects described radio-frequency (RF) switch, is used for changing the resonance frequency of antenna.
5. multiaerial system according to claim 1 and 2 is characterized in that, described radiating element is corresponding one by one with described filtering unit group.
6. according to claim 2 or 4 described multiaerial systems, it is characterized in that, described antenna element according to control signal as radiator or reverser or director.
7. multiaerial system according to claim 4 is characterized in that, the patch shape of described antenna element, size, number are identical or different.
8. multiaerial system according to claim 1 is characterized in that, described channel information comprises radiofrequency signal power, frequency departure, phase place at least.
9. the method for a radiated radio frequency (RF) signal is characterized in that, comprising:
According to the channel information from network interface card, calculate and obtain the first level signal;
Receive described the first level signal, and filter the interference signal in described the first level signal, obtain the second electrical level signal;
The second electrical level signal is converted to control signal;
According to the radiofrequency signal of described control signal radiation from described network interface card.
10. the method for radiated radio frequency (RF) signal according to claim 9 is characterized in that, the interference signal in described the first level signal of described filtration comprises:
Described the first level signal successively by the first filter unit, the second filter unit, is filtered high-frequency interferencing signal wherein, obtain described second electrical level signal.
11. the method for radiated radio frequency (RF) signal according to claim 9 is characterized in that, describedly comprises according to the radiofrequency signal of described control signal radiation from described network interface card:
According to described control signal, the corresponding antenna element of conducting will send to antenna element from the radiofrequency signal that network interface card transmits;
Described antenna element is according to described control signal, to corresponding direction radiated radio frequency (RF) signal.
12. the method for radiated radio frequency (RF) signal according to claim 11 is characterized in that, described antenna element comprises to corresponding direction radiated radio frequency (RF) signal according to described control signal:
Radio-frequency (RF) switch is according to described control signal conducting or cut off being electrically connected of paster and antenna;
The sky alignment corresponding direction radiated radio frequency (RF) signal of radiofrequency signal selector switch conducting, radiofrequency signal selector switch not the antenna of conducting as director, reverser or do not work.
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| CN103873020B (en) * | 2012-12-13 | 2018-11-02 | 北京普源精电科技有限公司 | A kind of radio-frequency signal source |
| CN106656236B (en) * | 2016-10-31 | 2019-03-01 | 维沃移动通信有限公司 | A method and electronic device for reducing SAR based on multiple antennas |
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