CN103546600A - Matching parameter processing method and mobile terminal - Google Patents
Matching parameter processing method and mobile terminal Download PDFInfo
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- CN103546600A CN103546600A CN201310521851.6A CN201310521851A CN103546600A CN 103546600 A CN103546600 A CN 103546600A CN 201310521851 A CN201310521851 A CN 201310521851A CN 103546600 A CN103546600 A CN 103546600A
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Abstract
The embodiment of the invention relates to a matching parameter processing method and a mobile terminal. The method comprises the following steps: a transmission circuit generates an incident wave signal; a directional coupler divides the incident wave signal into two incident wave signals, wherein one incident wave signal is subjected to coupling processing to generate an incident wave coupling signal, and the other incident wave signal is transmitted to an antenna through a matching network circuit; when the impedance of the antenna is not matched with the impedance of the matching network circuit, the directional coupler receives a reflected wave signal fed back by the antenna, and the reflected wave signal is subjected to coupling processing to generate a reflected wave coupling signal; a comparator obtains comparison parameters of the reflected wave coupling signal corresponding to a preset reflection threshold value and the incident wave coupling signal according to the reflected wave coupling signal and the incident wave coupling signal; a processor determines matching parameters according to the comparison parameters; the matching network circuit regulates the impedance of the matching network circuit according to the matching parameters. As a result, the impedance of the matching network circuit is regulated dynamically, and the performance of the antenna is optimized.
Description
Technical field
The present invention relates to communication technique field, relate in particular to a kind of processing method and mobile terminal of match parameter.
Background technology
Along with the use scenes of wireless terminal is more and more diversified, make the antenna of wireless terminal will be applicable to various frequency range, and various complexity, random scene.
In prior art, at the inner all kinds transducer that increases of wireless terminal, by transducer, detect environment or the frequency range at the current place of wireless terminal.Meanwhile, inner at wireless terminal, preset matching parameter, according to the detection signal of transducer, select corresponding match parameter, utilize match parameter to adjust the impedance of matching network circuit, the impedance of matching network circuit and the impedance phase of antenna are mated, so that antenna is operated in optimum state.
But the technical scheme providing in prior art also exposes following defect.
In prior art, must before wireless terminal dispatches from the factory, preset environment/frequency range, and to environment/frequency range of setting, the match parameter of coupling is set; But in actual applications, environment, the frequency range at terminal place change, default match parameter cannot be made accurately and adjusting the impedance of matching network, affects the operating state of antenna.
Summary of the invention
The embodiment of the present invention provides a kind of processing method and mobile terminal of match parameter, to improve the impedance of matching network circuit and the accuracy of Antenna Impedance Matching.
In first aspect, the embodiment of the present invention provides a kind of mobile terminal, and described mobile terminal comprises: radiating circuit, directional coupler, comparator, processor, matching network circuit and antenna;
Described radiating circuit, for generation of incident wave signal, and transfers to described directional coupler by described incident wave signal;
Described directional coupler, being used for is two-way incident wave signal by described incident wave division of signal, described in Dui Yi road, incident wave signal carries out coupling processing, produce incident wave coupled signal, and incident wave signal described in another road is transferred to described antenna by described matching network circuit, during also for the impedance mismatch of the impedance when described antenna and described matching network circuit, receive the reflection wave signal of described antenna feedback, described reflection wave signal is carried out to coupling processing, produce reflected wave coupled signal, and described incident wave coupled signal and described reflected wave coupled signal are transferred to described comparator,
Described comparator, be used for according to described reflected wave coupled signal and described incident wave coupled signal, obtain the described reflected wave coupled signal corresponding with default reflection threshold value and the comparative parameter of described incident wave coupled signal, and described comparative parameter is transferred to described processor;
Described processor, for according to described comparative parameter, determines match parameter, and described match parameter is transferred to described matching network circuit;
Described matching network circuit, for the impedance of described matching network circuit being adjusted according to described match parameter, makes the impedance of described matching network circuit and the impedance matching of described antenna.
In conjunction with first aspect, in the possible implementation of the first, described comparator specifically for,
By the processing of being divided by of described reflected wave coupled signal and described incident wave coupled signal, obtain the reflection parameters of described reflected wave coupled signal and described incident wave coupled signal;
When described reflection parameters is more than or equal to described reflection threshold value, described reflection parameters is transferred to described processor; Described comparative parameter is the described reflection parameters that is more than or equal to described reflection threshold value;
Described reflection parameters
Wherein, described A
r(k) for characterizing the function of phase and magnitude in described reflected wave coupled signal; Described A
i(k) for characterizing the function of phase and magnitude in described incident wave coupled signal.
In conjunction with first aspect, in the possible implementation of the second, described comparator specifically for,
By the processing of being divided by of described reflected wave coupled signal and described incident wave coupled signal, obtain the reflection parameters of described reflected wave coupled signal and described incident wave coupled signal;
When described reflection parameters is more than or equal to described reflection threshold value, according to described reflection parameters, obtains Amplitude Ratio and the phase difference of described reflected wave coupled signal and described incident wave coupled signal, and described Amplitude Ratio and described phase difference are transferred to described processor; Described comparative parameter is described Amplitude Ratio and described phase difference;
Described reflection parameters
Wherein, described A
r(k) for characterizing the function of phase and magnitude in described reflected wave coupled signal; Described A
i(k) for characterizing the function of phase and magnitude in described incident wave coupled signal.
In conjunction with the first or the possible implementation of the second of first aspect, in the third possible implementation, described processor specifically for,
According to described comparative parameter, obtain the impedance of described antenna;
Primary importance according to the impedance of described antenna on Randy Smyth circle diagram, determines impedance with the described matching network circuit of the impedance matching of the described antenna second place on Randy Smyth circle diagram;
Utilize described primary importance and the described second place, determine described match parameter, and described match parameter is transferred to described matching network circuit.
In conjunction with any possible implementation of first aspect or first aspect, in the 4th kind of possible implementation, described matching network circuit specifically comprises adjustable match circuit and fixing match circuit;
Described processor specifically for, described match parameter is transferred to described adjustable match circuit;
Described adjustable match circuit specifically for: according to described match parameter, the impedance of described adjustable match circuit is adjusted, is made the impedance sum of described adjustable match circuit and described fixedly match circuit and the impedance matching of described antenna.
In conjunction with the 4th kind of possible implementation of first aspect, in the 5th kind of possible implementation, described adjustable match circuit one end is connected with described directional coupler, and the other end is connected with described antenna by described fixedly match circuit.
The 4th kind of possible implementation in conjunction with first aspect, in the 6th kind of possible implementation, described fixedly match circuit one end is connected with described directional coupler, the other end is connected with antenna with described adjustable match circuit, described adjustable match circuit one end is connected with described antenna with described fixedly match circuit, other end ground connection.
In second aspect, the embodiment of the present invention provides a kind of processing method of match parameter, and described method comprises:
Radiating circuit produces incident wave signal;
Directional coupler is that incident wave signal carries out coupling processing described in two-way incident wave signal ，Dui mono-tunnel by described incident wave division of signal, produces incident wave coupled signal, and incident wave signal described in another road is transferred to antenna by matching network circuit;
When the impedance of described antenna and the impedance mismatch of described matching network circuit, described directional coupler receives the reflection wave signal of described antenna feedback, and described reflection wave signal is carried out to coupling processing, produces reflected wave coupled signal;
Comparator, according to described reflected wave coupled signal and described incident wave coupled signal, obtains the described reflected wave coupled signal corresponding with default reflection threshold value and the comparative parameter of described incident wave coupled signal;
Processor, according to described comparative parameter, is determined match parameter;
Matching network circuit is adjusted the impedance of described matching network circuit according to described match parameter, makes the impedance of described matching network circuit and the impedance matching of described antenna;
Described radiating circuit, described directional coupler, described comparator, described processor, described matching network circuit and described antenna, be included in mobile terminal.
In conjunction with second aspect, in the possible implementation of the first, described comparator, according to described reflected wave coupled signal and described incident wave coupled signal, obtains the described reflected wave coupled signal corresponding with default reflection threshold value and the comparative parameter of described incident wave coupled signal and specifically comprises:
By the processing of being divided by of described reflected wave coupled signal and described incident wave coupled signal, obtain the reflection parameters of described reflected wave coupled signal and described incident wave coupled signal; Described comparative parameter is the described reflection parameters that is more than or equal to described reflection threshold value;
Described reflection parameters
Wherein, described A
r(k) for characterizing the function of phase and magnitude in described reflected wave coupled signal; Described A
i(k) for characterizing the function of phase and magnitude in described incident wave coupled signal.
In conjunction with second aspect, in the possible implementation of the second, described comparator, according to described reflected wave coupled signal and described incident wave coupled signal, obtains the described reflected wave coupled signal corresponding with default reflection threshold value and the comparative parameter of described incident wave coupled signal and specifically comprises:
By the processing of being divided by of described reflected wave coupled signal and described incident wave coupled signal, obtain the reflection parameters of described reflected wave coupled signal and described incident wave coupled signal;
When described reflection parameters is more than or equal to described reflection threshold value, according to described reflection parameters, obtain Amplitude Ratio and the phase difference of described reflected wave coupled signal and described incident wave coupled signal; Described comparative parameter is described Amplitude Ratio and described phase difference;
Described reflection parameters
Wherein, described A
r(k) for characterizing the function of phase and magnitude in described reflected wave coupled signal; Described A
i(k) for characterizing the function of phase and magnitude in described incident wave coupled signal.
In conjunction with the first or the possible implementation of the second of second aspect, in the third possible implementation, described processor, according to described comparative parameter, determines that match parameter specifically comprises:
According to described comparative parameter, obtain the impedance of described antenna;
Primary importance according to the impedance of described antenna on Randy Smyth circle diagram, determines the second place with the impedance of the described matching network circuit of the impedance matching of described antenna;
Utilize described primary importance and the described second place, determine described match parameter.
In conjunction with the third possible implementation of second aspect or second aspect, in the 4th kind of possible implementation, described matching network circuit specifically comprises adjustable match circuit and fixing match circuit;
Described matching network circuit is adjusted the impedance of described matching network circuit according to described match parameter, and the impedance of described matching network circuit and the impedance matching of described antenna are specifically comprised:
Described adjustable match circuit is adjusted the impedance of described adjustable match circuit according to described match parameter, makes the impedance sum of described adjustable match circuit and described fixedly match circuit and the impedance matching of described antenna.
Therefore, processing method and the mobile terminal of the match parameter providing by the application embodiment of the present invention, the incident wave signal that directional coupler produces radiating circuit and the reflection wave signal of antenna feedback carry out coupling processing, processor utilizes incident wave coupled signal and reflected wave coupled signal to compare the coefficient of comparisons after processing, determine match parameter, matching network circuit is adjusted the impedance of matching network circuit according to match parameter, make the impedance of matching network circuit and the impedance matching of antenna, thereby solved the environment at wireless terminal place in prior art, frequency range is variation and unfixed, default match parameter cannot meet environment, the difference of frequency range is made accurately and being adjusted the impedance of matching network, affect the problem of the operating state of antenna, realized the impedance of dynamic adjusting matching network, make it the impedance matching with antenna, improve the accuracy of impedance matching, make antenna be operated in optimum matching status, meanwhile, without additional sensor, reduce mobile terminal cost.
Accompanying drawing explanation
A kind of mobile terminal schematic diagram that Fig. 1 provides for the embodiment of the present invention;
The directional coupler port schematic diagram that Fig. 2 provides for the embodiment of the present invention;
The Randy Smyth circle diagram that Fig. 3 provides for the embodiment of the present invention;
The another kind of mobile terminal schematic diagram that Fig. 4 provides for the embodiment of the present invention;
Another mobile terminal schematic diagram that Fig. 5 provides for the embodiment of the present invention;
The process flow figure of the match parameter that Fig. 6 provides for the embodiment of the present invention.
Embodiment
For making object, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
For ease of to the real-time understanding of the present invention, below in conjunction with accompanying drawing, with specific embodiment, be further explained explanation, embodiment does not form the restriction to the embodiment of the present invention.
Embodiment mono-
The mobile terminal that the Fig. 1 of take below provides as the example detailed description embodiment of the present invention, described mobile terminal can be realized the method that regulates dynamically matching network circuit impedance according to match parameter, a kind of mobile terminal schematic diagram that Fig. 1 provides for the embodiment of the present invention.In embodiments of the present invention, described device comprises: radiating circuit 110, directional coupler 120, comparator 130, processor 140, matching network circuit 150 and antenna 160;
Described radiating circuit 110, for generation of incident wave signal, and transfers to described directional coupler by described incident wave signal.
Particularly, user is using mobile terminal to call, or during browsing page, radiating circuit 110 produces incident wave signal W (k), and radiating circuit 110 transfers to directional coupler 120 by incident wave signal W (k).
Described directional coupler 120, being used for is two-way incident wave signal by described incident wave division of signal, described in Dui Yi road, incident wave signal carries out coupling processing, produces incident wave coupled signal, and incident wave signal described in another road is transferred to described antenna by described matching network circuit.
Described directional coupler 120 also for, when the impedance of described antenna and the impedance mismatch of described matching network circuit, receive the reflection wave signal of described antenna feedback, described reflection wave signal is carried out to coupling processing, produce reflected wave coupled signal, and described incident wave coupled signal and described reflected wave coupled signal are transferred to described comparator.
Particularly, the port one of directional coupler 120 receives the incident wave signal W (k) of radiating circuit transmission, and incident wave signal W (k) is divided into two-way incident wave signal W
1and W (k)
2(k), directional coupler 120 passes through inner couplings circuit to W
1(k) carry out coupling processing, produce incident wave coupled signal A
i(k), and by incident wave coupled signal A
i(k) port 3 by directional coupler transfers to comparator 130.
In embodiments of the present invention, the impedance mismatch of the impedance of described antenna 160 and matching network circuit 150 specifically refers to, conjugate impedance match not between the impedance of the impedance of antenna 160 and matching network circuit 150, for example, the impedance of supposing antenna 160 is 50+25j, when the impedance of matching network circuit 150 is 50-25j, the impedance matching of the impedance of antenna 160 and matching network circuit 150, the impedance of any matching network circuit 150 in addition all with the impedance mismatch of antenna 160.
Be understandable that, directional coupler 120 comprises input, straight-through end, coupled end and isolation end, as shown in Figure 2, input receives the signal of higher level equipment transmission, by straight-through end, signal is transferred to subordinate equipment, after signal is coupled, by coupled end, transfer to subordinate equipment.
In embodiments of the present invention, when radiating circuit 110 is conveyed into ejected wave signal W (k) to the port one of directional coupler, port one is input, and port 2 is straight-through end, and port 3 is coupled end, and port 4 is isolation end; Antenna 160 is by matching network circuit 150 during to the port 2 transmission reflection wave signal R (k) of directional coupler 120, and port one is straight-through end, and port 2 is input, and port 3 is isolation end, and port 4 is coupled end.
Described comparator 130, be used for according to described reflected wave coupled signal and described incident wave coupled signal, obtain the described reflected wave coupled signal corresponding with default reflection threshold value and the comparative parameter of described incident wave coupled signal, and described comparative parameter is transferred to described processor.
Particularly, comparator 130 is according to reflected wave coupled signal A
rand incident wave coupled signal A (k)
i(k), obtain the reflected wave coupled signal A corresponding with default reflection threshold value
r(k) with incident wave coupled signal A
i(k) comparative parameter, and judge whether comparative parameter (for example surpasses default reflection threshold value, default reflection threshold value is-6dB), when if comparative parameter surpasses reflection threshold value, comparator 130 is determined the impedance of matching network circuit 150 and the impedance of antenna 160 impedance imbalance, need regulate the impedance of matching network circuit, comparator 130 transfers to processor 140 by comparative parameter.
Further, in the first implementation,
Described reflection parameters S
11can determine by following formula:
Wherein, described A
r(k) for characterizing the function of phase and magnitude in described reflected wave coupled signal; Described A
r(k) for characterizing the function of phase and magnitude in described incident wave coupled signal;
Described reflected wave coupled signal A
r(k) specifically can determine by following formula:
A
r(k)=R (k) * S42 formula (2)
Described incident wave coupled signal A
i(k) specifically can determine by following formula:
A
i(k)=W (k) * S31 formula (3)
Described R (k) is for characterizing the function of phase and magnitude in reflection wave signal; Described W (k) is for characterizing the function of phase and magnitude in incident wave signal; Described S42 and described S31 are transmission coefficient.
In the second implementation, comparator 130 is by reflected wave coupled signal A
rand incident wave coupled signal A (k)
i(k) processing of being divided by, obtains reflected wave coupled signal A
r(k) with incident wave coupled signal A
i(k) reflection parameters S
11; As reflection parameters S
11while being more than or equal to reflection threshold value, according to reflection parameters, obtain reflected wave coupled signal A
r(k) with incident wave coupled signal A
i(k) Amplitude Ratio and phase difference, and Amplitude Ratio and phase difference are transferred to processor 140; In the second implementation, comparative parameter is Amplitude Ratio and phase difference.
Be understandable that, in the second implementation, reflection parameters is determined by above formula (1).
130 couples of reflection parameters S of comparator
11take absolute value, by the reflection parameters S after taking absolute value
11as reflected wave coupled signal A
r(k) with incident wave coupled signal A
i(k) Amplitude Ratio, and from reflection parameters, obtain phase difference.Be understandable that, in reflection parameters, comprise the phase difference of reflected wave coupled signal and incident wave coupled signal.
Described processor 140, for according to described comparative parameter, determines match parameter, and described match parameter is transferred to described matching network circuit.
Particularly, processor 140 utilizes the comparative parameter of comparator 130 transmission, determines match parameter, and definite match parameter is transferred to matching network circuit 150, processor 140 can be carried at definite match parameter in control signal, and control signal is transferred to matching network circuit 150.
Further, described processor 140, according to described comparative parameter, determines that match parameter is specially:
According to described comparative parameter, obtain the impedance of described antenna;
Primary importance according to the impedance of described antenna on Randy Smyth circle diagram, determines impedance with the described matching network circuit of the impedance matching of the described antenna second place on Randy Smyth circle diagram;
Utilize described primary importance and the described second place, determine described match parameter, and described match parameter is transferred to described matching network circuit.
In first, realize in situation, processor 140 is by reflection parameters S
11calculate the impedance Z of described antenna 160
l, the impedance Z of antenna 160
lcan determine by following formula:
Wherein, described S
11for described reflection coefficient, described Z
0for circuit impedance, described circuit impedance is radiating circuit impedance, directional coupler impedance, matching network circuit impedance sum;
Then, processor 140 is determined the impedance Z of antenna 160
lposition on Randy Smyth circle diagram, as shown in Figure 3, the Randy Smyth circle diagram that Fig. 3 provides for the embodiment of the present invention.Round wire in circle diagram represents the real number value of resistance drag, be resistance value, middle horizontal line and the line shedding up and down represent the imaginary value of resistance drag, the resistance being produced under high frequency by electric capacity or inductance, in the middle of what make progress is positive number, downward is negative.
In Fig. 3, the impedance Z of the antenna 160 that processor 140 is definite
lprimary importance on Randy Smyth circle diagram is position 1, due to the impedance of matching network circuit 150 should with the impedance Z of antenna 160
lconjugate impedance match, therefore, processor will carry out mirror image processing to position 1, determine the position 2 with position 1 conjugation on the former figure of Randy Smyth, and impedance value corresponding to this position is the impedance of matching network circuit 150.As the position 2 in Fig. 3.
Under the second is realized situation, processor by according to amplitude difference with phase place than the impedance Z of definite antenna 160
lposition on Randy Smyth circle diagram, because the round wire by circle diagram, middle horizontal line and the line shedding up and down can be determined concrete impedance value.Therefore,, by Randy Smyth circle diagram, can obtain the impedance Z of antenna 160
l.Subsequent step as hereinbefore, is no longer repeated again.
Described matching network circuit 150, for the impedance of described matching network circuit being adjusted according to described match parameter, makes the impedance of described matching network circuit and the impedance matching of described antenna.
Particularly, matching network circuit 150 is adjusted the impedance of matching network circuit 150 according to the match parameter of processor transmission, makes the impedance of matching network circuit 150 and the impedance matching of antenna 160.
In embodiments of the present invention, matching network circuit 150 specifically can comprise adjustable match circuit 151 and fixing match circuit 152.Adjustable match circuit 151, fixedly the connected mode of match circuit 152 as shown in Fig. 4 or Fig. 5.
In embodiments of the present invention, described fixedly match circuit 152 is specially the fixing match circuit of impedance; Described adjustable match circuit is specially the adjustable match circuit of impedance.
Wherein, processor 140 specifically for, match parameter is transferred to adjustable match circuit 151.
Therefore, the mobile terminal providing by the application embodiment of the present invention, the incident wave signal that directional coupler produces radiating circuit and the reflection wave signal of antenna feedback carry out coupling processing, processor utilizes incident wave coupled signal and reflected wave coupled signal to compare the coefficient of comparisons after processing, determine match parameter, matching network circuit is adjusted the impedance of matching network circuit according to match parameter, make the impedance of matching network circuit and the impedance matching of antenna, thereby solved the environment at wireless terminal place in prior art, frequency range is variation and unfixed, default match parameter cannot meet environment, the difference of frequency range is made accurately and being adjusted the impedance of matching network, affect the problem of the operating state of antenna, realized the impedance of dynamic adjusting matching network, make it the impedance matching with antenna, improve the accuracy of impedance matching, make antenna be operated in optimum matching status, meanwhile, without additional sensor, reduce mobile terminal cost.
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, the specific embodiment of the invention is described in further detail.
Embodiment bis-
The Fig. 6 of take below describes the processing method of the match parameter that the embodiment of the present invention provides in detail as example, and the mobile terminal in above-described embodiment one can be for realizing the method in the present embodiment.The process flow figure of the match parameter that Fig. 6 provides for the embodiment of the present invention, specifically comprises the following steps:
Step 610, radiating circuit produce incident wave signal.
Step 620, directional coupler are two-way incident wave signal by described incident wave division of signal, described in Dui Yi road, incident wave signal carries out coupling processing, produce incident wave coupled signal, and incident wave signal described in another road is transferred to antenna by matching network circuit.
Step 630, when the impedance of described antenna and the impedance mismatch of described matching network circuit, described directional coupler receives the reflection wave signal of described antenna feedback, and described reflection wave signal is carried out to coupling processing, produces reflected wave coupled signal.
Step 640, comparator, according to described reflected wave coupled signal and described incident wave coupled signal, obtain the described reflected wave coupled signal corresponding with default reflection threshold value and the comparative parameter of described incident wave coupled signal.
Particularly, reflected wave coupled signal and described incident wave coupled signal are compared to processing, obtain coefficient of comparisons.
Further, in the first implementation, described comparator, according to described reflected wave coupled signal and described incident wave coupled signal, obtains the described reflected wave coupled signal corresponding with default reflection threshold value and the comparative parameter of described incident wave coupled signal and specifically comprises:
Comparator, by the processing of being divided by of reflected wave coupled signal and incident wave coupled signal, obtains the reflection parameters of reflected wave coupled signal and incident wave coupled signal, and described reflection parameters can be determined by through type (1); In the first implementation, comparative parameter is the reflection parameters that is more than or equal to reflection threshold value.
In the second implementation, described comparator, according to described reflected wave coupled signal and described incident wave coupled signal, obtains the described reflected wave coupled signal corresponding with default reflection threshold value and the comparative parameter of described incident wave coupled signal and specifically comprises:
Comparator, by the processing of being divided by of reflected wave coupled signal and incident wave coupled signal, obtains the reflection parameters of reflected wave coupled signal and incident wave coupled signal, and described reflection parameters can be determined by through type (1).
When reflection parameters is more than or equal to reflection threshold value, according to reflection parameters, comparator obtains Amplitude Ratio and the phase difference of reflected wave coupled signal and incident wave coupled signal; In the second implementation, comparative parameter is Amplitude Ratio and phase difference.
Be understandable that, the process that comparator obtains Amplitude Ratio and phase difference describes in detail aforementioned, at this, no longer repeats.
Step 650, processor, according to described comparative parameter, are determined match parameter.
Particularly, after obtaining comparative parameter, processor, according to reflection parameters, is determined match parameter.
Further, described according to described comparative parameter, determine that match parameter specifically comprises: processor, according to comparative parameter, obtains the impedance of antenna; Primary importance according to the impedance of antenna on Randy Smyth circle diagram, processor is determined the second place with the impedance of the matching network circuit of the impedance matching of antenna; Utilize primary importance and the second place, processor is determined match parameter.
In the first implementation, first, according to reflection parameters, processor calculates the impedance of antenna, and the impedance of described antenna can be determined by through type (4); Then, the position of the impedance that processor is determined antenna on Randy Smyth circle diagram, as shown in Figure 4; Primary importance according to the impedance of antenna on Randy Smyth circle diagram, determines the second place of the impedance of matching network circuit, utilizes primary importance and the second place, and processor is determined match parameter.
In the second implementation, according to Amplitude Ratio and phase difference, the position of the impedance that processor is determined antenna on Randy Smyth circle diagram, as shown in Figure 4; By Randy Smyth circle diagram, obtain the impedance of antenna, the primary importance of the impedance that utilizes antenna on Randy Smyth circle diagram, determines the second place of the impedance of matching network circuit; Utilize primary importance and the second place, processor is determined match parameter.
Step 560, matching network circuit are adjusted the impedance of described matching network circuit according to described match parameter, have made the impedance of described matching network circuit and the impedance matching of described antenna.
Particularly, according to definite match parameter, the impedance of matching network circuit is adjusted, made the impedance of matching network circuit and the impedance matching of antenna.
In embodiments of the present invention, matching network circuit comprises adjustable match circuit and fixing match circuit.Adjustable match circuit, fixedly the connected mode of match circuit as shown in Fig. 4 or Fig. 5.
Further, described matching network circuit is adjusted the impedance of described matching network circuit according to described match parameter, and the impedance of described matching network circuit and the impedance matching of described antenna are specifically comprised:
Matching network circuit is adjusted the impedance of adjustable match circuit according to match parameter, makes adjustable match circuit and the fixedly impedance sum of match circuit and the impedance matching of antenna.When the impedance that has realized antenna changes because of the residing environment of mobile terminal, frequency range, matching network circuit is according to the impedance of adjustable match circuit in match parameter inching matching network circuit, make the impedance matching of matching network circuit and antenna, the accuracy that improves impedance matching, makes antenna be operated in optimum matching status.Meanwhile, mobile terminal self is realized the adjustment to impedance, need not additional sensor, reduced the cost of mobile terminal.
Be understandable that, the described radiating circuit above relating to, described directional coupler, described comparator, described processor, described matching network circuit and described antenna, be included in mobile terminal.
Therefore, the method of the dynamic adjustments match parameter providing by the application embodiment of the present invention, the incident wave signal and the reflection wave signal that produce are carried out to coupling processing, utilize incident wave coupled signal and reflected wave coupled signal to compare the coefficient of comparisons after processing, determine match parameter, matching network circuit is adjusted the impedance of matching network circuit according to match parameter, make the impedance of matching network circuit and the impedance matching of antenna, thereby solved the environment at wireless terminal place in prior art, frequency range is variation and unfixed, default match parameter cannot meet environment, the difference of frequency range is made accurately and being adjusted the impedance of matching network, affect the problem of the operating state of antenna, realized the impedance of dynamic adjusting matching network, make it the impedance matching with antenna, improve the accuracy of impedance matching, make antenna be operated in optimum matching status, meanwhile, without additional sensor, reduce mobile terminal cost.
Those skilled in the art should further recognize, unit and the algorithm steps of each example of describing in conjunction with embodiment disclosed herein, can realize with electronic hardware, computer software or the combination of the two, for the interchangeability of hardware and software is clearly described, composition and the step of each example described according to function in the above description in general manner.These functions are carried out with hardware or software mode actually, depend on application-specific and the design constraint of technical scheme.Those skilled in the art can specifically should be used for realizing described function with distinct methods to each, but this realization should not thought and exceeds scope of the present invention.
The software module that the method for describing in conjunction with embodiment disclosed herein or the step of algorithm can use hardware, processor to carry out, or the combination of the two is implemented.Software module can be placed in the storage medium of any other form known in random asccess memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technical field.
Above-described embodiment; object of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the foregoing is only the specific embodiment of the present invention; the protection range being not intended to limit the present invention; within the spirit and principles in the present invention all, any modification of making, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (12)
1. a mobile terminal, is characterized in that, described mobile terminal comprises: radiating circuit, directional coupler, comparator, processor, matching network circuit and antenna;
Described radiating circuit, for generation of incident wave signal, and transfers to described directional coupler by described incident wave signal;
Described directional coupler, being used for is two-way incident wave signal by described incident wave division of signal, described in Dui Yi road, incident wave signal carries out coupling processing, produce incident wave coupled signal, and incident wave signal described in another road is transferred to described antenna by described matching network circuit, during also for the impedance mismatch of the impedance when described antenna and described matching network circuit, receive the reflection wave signal of described antenna feedback, described reflection wave signal is carried out to coupling processing, produce reflected wave coupled signal, and described incident wave coupled signal and described reflected wave coupled signal are transferred to described comparator,
Described comparator, be used for according to described reflected wave coupled signal and described incident wave coupled signal, obtain the described reflected wave coupled signal corresponding with default reflection threshold value and the comparative parameter of described incident wave coupled signal, and described comparative parameter is transferred to described processor;
Described processor, for according to described comparative parameter, determines match parameter, and described match parameter is transferred to described matching network circuit;
Described matching network circuit, for the impedance of described matching network circuit being adjusted according to described match parameter, makes the impedance of described matching network circuit and the impedance matching of described antenna.
2. mobile terminal according to claim 1, is characterized in that, described comparator specifically for:
By the processing of being divided by of described reflected wave coupled signal and described incident wave coupled signal, obtain the reflection parameters of described reflected wave coupled signal and described incident wave coupled signal;
When described reflection parameters is more than or equal to described reflection threshold value, described reflection parameters is transferred to described processor; Described comparative parameter is the described reflection parameters that is more than or equal to described reflection threshold value;
Described reflection parameters
Wherein, described A
r(k) for characterizing the function of phase and magnitude in described reflected wave coupled signal; Described A
i(k) for characterizing the function of phase and magnitude in described incident wave coupled signal.
3. mobile terminal according to claim 1, is characterized in that, described comparator specifically for:
By the processing of being divided by of described reflected wave coupled signal and described incident wave coupled signal, obtain the reflection parameters of described reflected wave coupled signal and described incident wave coupled signal;
When described reflection parameters is more than or equal to described reflection threshold value, according to described reflection parameters, obtains Amplitude Ratio and the phase difference of described reflected wave coupled signal and described incident wave coupled signal, and described Amplitude Ratio and described phase difference are transferred to described processor; Described comparative parameter is described Amplitude Ratio and described phase difference;
Described reflection parameters
Wherein, described A
r(k) for characterizing the function of phase and magnitude in described reflected wave coupled signal; Described A
i(k) for characterizing the function of phase and magnitude in described incident wave coupled signal.
4. according to the mobile terminal described in claim 2 or 3, it is characterized in that, described processor specifically for:
According to described comparative parameter, obtain the impedance of described antenna;
Primary importance according to the impedance of described antenna on Randy Smyth circle diagram, determines impedance with the described matching network circuit of the impedance matching of the described antenna second place on Randy Smyth circle diagram;
Utilize described primary importance and the described second place, determine described match parameter, and described match parameter is transferred to described matching network circuit.
5. according to the arbitrary described mobile terminal of claim 1-4, it is characterized in that, described matching network circuit specifically comprises adjustable match circuit and fixing match circuit;
Described processor specifically for, described match parameter is transferred to described adjustable match circuit;
Described adjustable match circuit specifically for: according to described match parameter, the impedance of described adjustable match circuit is adjusted, is made the impedance sum of described adjustable match circuit and described fixedly match circuit and the impedance matching of described antenna.
6. mobile terminal according to claim 5, is characterized in that, described adjustable match circuit one end is connected with described directional coupler, and the other end is connected with described antenna by described fixedly match circuit.
7. the mobile terminal of telling according to claim 5, it is characterized in that, described fixedly match circuit one end is connected with described directional coupler, the other end is connected with antenna with described adjustable match circuit, described adjustable match circuit one end is connected with described antenna with described fixedly match circuit, other end ground connection.
8. a processing method for match parameter, is characterized in that, described method comprises:
Radiating circuit produces incident wave signal;
Directional coupler is that incident wave signal carries out coupling processing described in two-way incident wave signal ，Dui mono-tunnel by described incident wave division of signal, produces incident wave coupled signal, and incident wave signal described in another road is transferred to antenna by matching network circuit;
When the impedance of described antenna and the impedance mismatch of described matching network circuit, described directional coupler receives the reflection wave signal of described antenna feedback, and described reflection wave signal is carried out to coupling processing, produces reflected wave coupled signal;
Comparator, according to described reflected wave coupled signal and described incident wave coupled signal, obtains the described reflected wave coupled signal corresponding with default reflection threshold value and the comparative parameter of described incident wave coupled signal;
Processor, according to described comparative parameter, is determined match parameter;
Matching network circuit is adjusted the impedance of described matching network circuit according to described match parameter, makes the impedance of described matching network circuit and the impedance matching of described antenna;
Described radiating circuit, described directional coupler, described comparator, described processor, described matching network circuit and described antenna, be included in mobile terminal.
9. method according to claim 8, it is characterized in that, described comparator, according to described reflected wave coupled signal and described incident wave coupled signal, obtains the described reflected wave coupled signal corresponding with default reflection threshold value and the comparative parameter of described incident wave coupled signal and specifically comprises:
By the processing of being divided by of described reflected wave coupled signal and described incident wave coupled signal, obtain the reflection parameters of described reflected wave coupled signal and described incident wave coupled signal; Described comparative parameter is the described reflection parameters that is more than or equal to described reflection threshold value;
Described reflection parameters
Wherein, described A
r(k) for characterizing the function of phase and magnitude in described reflected wave coupled signal; Described A
i(k) for characterizing the function of phase and magnitude in described incident wave coupled signal.
10. method according to claim 8, it is characterized in that, described comparator, according to described reflected wave coupled signal and described incident wave coupled signal, obtains the described reflected wave coupled signal corresponding with default reflection threshold value and the comparative parameter of described incident wave coupled signal and specifically comprises:
By the processing of being divided by of described reflected wave coupled signal and described incident wave coupled signal, obtain the reflection parameters of described reflected wave coupled signal and described incident wave coupled signal;
When described reflection parameters is more than or equal to described reflection threshold value, according to described reflection parameters, obtain Amplitude Ratio and the phase difference of described reflected wave coupled signal and described incident wave coupled signal; Described comparative parameter is described Amplitude Ratio and described phase difference;
Described reflection parameters
Wherein, described A
r(k) for characterizing the function of phase and magnitude in described reflected wave coupled signal; Described A
i(k) for characterizing the function of phase and magnitude in described incident wave coupled signal.
11. according to the method described in claim 9 or 10, it is characterized in that, described processor, according to described comparative parameter, determines that match parameter specifically comprises:
According to described comparative parameter, obtain the impedance of described antenna;
Primary importance according to the impedance of described antenna on Randy Smyth circle diagram, determines the second place with the impedance of the described matching network circuit of the impedance matching of described antenna;
Utilize described primary importance and the described second place, determine described match parameter.
Method described in 12. according to Claim 8 or 11, is characterized in that, described matching network circuit specifically comprises adjustable match circuit and fixing match circuit;
Described matching network circuit is adjusted the impedance of described matching network circuit according to described match parameter, and the impedance of described matching network circuit and the impedance matching of described antenna are specifically comprised:
Described adjustable match circuit is adjusted the impedance of described adjustable match circuit according to described match parameter, makes the impedance sum of described adjustable match circuit and described fixedly match circuit and the impedance matching of described antenna.
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