CN104953286A - Antenna signal tuning device of terminal as well as terminal - Google Patents
Antenna signal tuning device of terminal as well as terminal Download PDFInfo
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- CN104953286A CN104953286A CN201510375231.5A CN201510375231A CN104953286A CN 104953286 A CN104953286 A CN 104953286A CN 201510375231 A CN201510375231 A CN 201510375231A CN 104953286 A CN104953286 A CN 104953286A
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Abstract
An embodiment of the invention discloses an antenna signal tuning device of a terminal as well as the terminal and relates to the field of communication. The antenna device can be arranged outside or inside, the radio frequency performance of the terminal is improved, and performance compatibility of the antenna in different states is improved. A single-frequency rod antenna body is connected with a circuit board of the terminal through a first feed point and used for transmitting a wireless signal which is tuned by a coupling branch and has a target frequency point when the single-frequency rod antenna body is in different states. The coupling branch is connected with the circuit board of the terminal through a second feed point and used for tuning actual impedance values of the single-frequency rod antenna body in different states according to impedance values of the single-frequency rod antenna body in different states and a mutual impedance value of the coupling branch for the single-frequency rod antenna body. Accordingly, the frequency deviation problem of a single-frequency rod antenna in different states is solved.
Description
Technical field
The present invention relates to the communications field, particularly relate to aerial signal tuner and the terminal of a kind of terminal of terminal.
Background technology
Growing along with radio network technique, is connected to local area network (LAN) or the Internet by wireless (Wi-Fi, Wireless-Fidelity) mode, has become the main networking approach of various intelligent terminal.
Traditional terminal adopts the mode of external antenna to receive and wireless signal emission, but external antenna can hinder user operation when the horizontal screen operation of user, and therefore, existing intelligent terminal mainly adopts the mode of built-in aerial receive or launch wireless network signal.
But, along with the increase day by day of intelligent terminal function, all kinds of chip of intelligent terminal inside and the integrated level of module more and more higher, thus result in for receive and the antenna empty regions of wireless signal emission is fewer and feweri, electromagnetic environment near antenna becomes increasingly complex, and then the problem that the radio-frequency performance that result in the antenna in wireless module reduces, cause the phenomenon that the wireless signal of intelligent terminal is poor.
Summary of the invention
The embodiment of the present invention provides the aerial signal tuner of terminal, terminal and method, can external, antenna assembly that can be built-in in order to provide, and the performance that improve under the radio-frequency performance of terminal and antenna different shape is compatible.
The embodiment of the present invention provides a kind of aerial signal tuner of terminal, and this device comprises:
Single-frequency telescopic antenna body, is connected with the circuit board of described terminal by the first feedback point, for when described single-frequency telescopic antenna body is in different conditions, launches after the branch that is coupled is tuning and has the wireless signal of target frequency;
Described coupling branch, be connected with the circuit board of described terminal by the second feedback point, for the mutual impedance value utilizing the resistance value of described single-frequency telescopic antenna body when being in different conditions and described coupling branch to produce described single-frequency telescopic antenna body, the wireless signal launched when being in different conditions to described single-frequency telescopic antenna body carries out tuning.
The embodiment of the present invention also provides a kind of terminal, and this terminal comprises: the aerial signal tuner of terminal and terminal body.
As can be seen from technique scheme, the aerial signal tuner of the terminal that the embodiment of the present invention provides has single-frequency telescopic antenna body and coupling branch, wherein single-frequency telescopic antenna body can be in different conditions, as complete collapsed state or apart state, the wireless signal that coupling branch is used for launching when being in complete collapsed state or apart state to single-frequency telescopic antenna body carries out tuning.When single-frequency telescopic antenna body is in complete collapsed state or apart state, because antenna length is shorter, now antenna impedance is comparatively large, and the spurious impedance of be now coupled branch and antenna is relatively little, and now still to remain on the antenna resonance impedance point of needs constant for the practical impedance of antenna; From the angle of aerial signal, but due to the change of antenna length, antenna body length has been less than the resonance length of required frequency, but the change of now extra spurious impedance just can be offset antenna length and be changed the frequency deviation brought in impedance, making the resonance impedance of antenna continue to remain on, working frequency points needs, thus it is constant that the resonance frequency of antenna can be made to remain on original frequency.Thus solve the frequency deviation problem that external telescopic antenna produces when packing up, and then provide a kind of antenna pull rod device, improve the radio-frequency performance of terminal.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly introduced, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the schematic diagram of a kind of aerial position in the embodiment of the present invention;
The schematic diagram of the metal alloy plate region of the mobile phone that Fig. 2 provides for the embodiment of the present invention and the position relationship in non-metal antenna headroom district;
Fig. 3 is in the schematic diagram of the state of pulling open for external antenna that the embodiment of the present invention provides;
Fig. 4 is in the schematic diagram of collapsed state for external antenna that the embodiment of the present invention provides;
The structural representation that the external antenna that Fig. 5 provides for the embodiment of the present invention pulls open;
The structural representation that Fig. 6 packs up for the external antenna that the embodiment of the present invention provides;
The schematic diagram of the standing wave of the built-in aerial that Fig. 7 provides for the embodiment of the present invention;
The schematic diagram of the standing wave of the external antenna that Fig. 8 provides for the embodiment of the present invention;
Fig. 9 is the radiation pattern of common built-in aerial terminal of the prior art;
The radiation pattern of the external antenna terminal that Figure 10 provides for the embodiment of the present invention;
Circuit diagram between the coupling branch that Figure 11 provides for the embodiment of the present invention and antenna body;
Figure 12 is the schematic diagram of the aerial angle in the embodiment of the present invention;
Figure 13 a is the schematic diagram of the coupling branch that the metal material of a kind of shape in the embodiment of the present invention is formed;
Figure 13 b is the schematic diagram of the coupling branch that the metal material of another kind of shape in the embodiment of the present invention is formed;
Figure 13 c is the schematic diagram of the coupling branch that the metal material of another kind of shape in the embodiment of the present invention is formed;
Figure 13 d is the schematic diagram of the coupling branch that the metal material of another kind of shape in the embodiment of the present invention is formed;
The structural representation of the aerial signal tuner of a kind of terminal that Figure 14 provides for the embodiment of the present invention;
The structural representation of a kind of terminal that Figure 15 provides for the embodiment of the present invention.
Embodiment
In order to make the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, the present invention is described in further detail, and obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention.
The embodiment of the present invention can be applied to various types of terminal (such as: intelligent mobile terminal, smart mobile phone, panel computer) and the various equipment that can carry out radio communication.
Current built-in Wi-Fi antenna needs to be highly integrateable in antenna terminal inside, and cause the complexity of antenna headroom difference and electromagnetic environment, therefore the performance of antenna is subject to great limitation, and Antenna gain pattern also cannot accomplish omnidirectional simultaneously.User is in real experiences, and obviously can feel that online is not smooth has situation about going offline to occur even often.Compared to the design limitation of built-in Wi-Fi antenna; the radiation headroom of external Wi-Fi antenna due to antenna and the relative improvement of electromagnetic environment; antenna performance is significantly improved; the radiation directivity of antenna can accomplish omnidirectional usually, and the real experiences of user can improve significantly compared to built-in aerial.But the external mobile terminal caused of antenna is not portable and unsightly, often do not accepted by user, cannot become the main flow of Wi-Fi Antenna Design.Therefore the lifting design of Wi-Fi signal also becomes the emphasis direction of radio frequency research and development.
The terminal of the two built-in Wi-Fi antenna of current employing, can improve the signal receiving sensitivity problem of Wi-Fi by two built-in aerial.But this improvement mode is also just confined to the double antenna design of built-in Wi-Fi antenna, but in Wi-Fi agreement, 802.11a/b/g does not support mimo antenna form, namely the good road branch of selectivity can only use in two-way built-in aerial.So the performance of antenna can only do limited lifting on the basis of existing Antenna Design.
In embodiments of the present invention, when external antenna pulls open, antenna length is operated near the quarter-wave of Wi-Fi frequency the tuning part (be namely coupled branch) of antenna, works alone, and the built-in tuning impact played is very little.When external antenna is packed up, the tuner section impact produced that is coupled with antenna part is relatively large, originally antenna body pack up after effective length too short, cause working frequency points at 2.6GHz and more than 6GHz, but by tuning coupling now, by making the resonance frequency of antenna still be retained in required Wi-Fi frequency range to the change of resonance impedance, thus solve the serious problem of Wi-Fi antenna frequency deviation.In general, the cabling form in antenna tuning portion we try too much group and can realize, size Control is relatively tight, and deviation can not super many 1mm.
The object of the embodiment of the present invention is to provide a kind of novel antenna assembly, by increase on same antenna path for the parasitic couplings part of external telescopic antenna design (namely, coupling branch), realize external telescopic antenna and still possess good Wi-Fi antenna function by parasitic coupling effect when packing up built-in when frequency deviation, thus reach the Wi-Fi Functional Design of telescopic antenna in external and built-in compatibility.The headroom radiation space good due to this antenna assembly and electromagnetic environment, in the launch and accept efficiency and electromagnetic interference shield effect of antenna, comparatively built-in aerial has obvious advantage.In addition, consider the actual use habit of user, external antenna is structurally designed to telescopic bar form by the embodiment of the present invention, can according to the form of external antenna in the use scenes of user and custom unrestricted choice.Simultaneously at the feedback point place, ground that mobile terminal antenna device is other, increase the parasitic branch of antenna, the frequency of tuning external antenna can be played after external antenna is packed up, offset the frequency deviation that external antenna plays because length changes.The above device of the embodiment of the present invention, lays particular emphasis on the compatible design with interior external antenna, to meet under different scene antenna to the performance requirement of required frequency range simultaneously.
The innovative point of the embodiment of the present invention is for the current problem excessively weak for general mobile terminal built-in Wi-Fi aerial signal, can realize the compatible design thinking and countermeasure of antenna function at different use scenes by the way increasing built-in tuner section (be namely coupled branch) simultaneously.
Based on above design, the difference of the embodiment of the present invention and common external antenna is: due to the characteristic of antenna resonance, external unipole antenna must under length-specific (quarter-wave) guarantee at resonance in required frequency band.Common external telescopic antenna cannot solve the problem of antenna frequency deviation under two kinds of length after antenna pulls open and packs up, and namely cannot realize the frequency band of antenna after pulling open and packing up simultaneously and cover.The embodiment of the present invention creates the design of the parasitic couplings part of required frequency band on conventional whip antenna basis, and when external antenna pulls open, antenna realizes the resonance of required frequency under quarter-wave; When external antenna is packed up, antenna, passing through parasitic couplings part to the parasitic tuning of antenna frequency under quarter-wave, makes the resonance of antenna still rest on required frequency.In addition, antenna condition can be made much smaller than in quarter-wave situation, by the tunning effect of coupling unit mutual impedance, under making the working frequency points of antenna still remain on required frequency, to offset the too short frequency deviation caused of antenna length.Like this, the compatible antennas design that the embodiment of the present invention provides can solve the frequency bias properties of external antenna under different conditions, for compatible design external in antenna provides technical foundation.
It should be noted that, in embodiments of the present invention, single-frequency telescopic antenna body can for being applicable to the antenna assembly of the one-segment such as GPS, WI-FI.
Below for mobile phone as described mobile terminal, by a specific embodiment, the design of the concrete structure of antenna assembly proposed by the invention and operation principle thereof are set forth in detail.
On the basis of current Cell Phone Design, in order to improve performance and the directivity of Wi-Fi antenna, the embodiment of the present invention can increase a collapsible external telescopic antenna on mobile phone top.Fig. 1 shows the schematic diagram of a kind of aerial position in the embodiment of the present invention, and as shown in Figure 1, the embodiment of the present invention can be provided with external telescopic bar antenna 11 above handset touch panel 10.Consider user's use habit, retractable aerial is positioned over upper right side, mobile phone A face, it also avoid user's impact of bringing to antenna of staff in use simultaneously.
In structural design, the antenna assembly that the embodiment of the present invention provides can be arranged at the position of metal alloy plate away from mobile terminal and other metal devices, in order to improve antenna efficiency and to avoid interference.Fig. 2 shows the schematic diagram of the metal alloy plate region of the mobile phone that the embodiment of the present invention provides and the position relationship in non-metal antenna headroom district; As shown in Figure 2, non-metal antenna headroom district 21 can be reserved with on the metal alloy plate region 20 of mobile phone, with thinking that antenna assembly (especially when antenna assembly is packed up completely) provides more headroom district.
The external antenna that Fig. 3 shows the embodiment of the present invention to be provided is in the schematic diagram of the state of pulling open.The external antenna part of mobile terminal divides 32 to be connected to antenna body 33 by signal feed 31 by antenna interconnecting piece to form unipole antenna form, and when wherein antenna body 33 is in and pulls open state, the length of antenna body is 1/4th of required band wavelength.Coupling branch (i.e. tuning part) 35 is presented point 34 by ground and is connected to tuning routing region.Be placed on mobile terminal due to antenna body 33 and the area that can be coupled with the branch 35 that is coupled is less, the parasitic coupling effect that coupling branch 35 pairs of antenna bodies 33 play is not obvious.
It should be noted that, in embodiments of the present invention, signal feed 31 and ground feedback point 34 are different feedback points, and therefore external antenna part (and single-frequency telescopic antenna) is connected with the circuit board of terminal by different feedbacks point with tuning part (and coupling branch).
The external antenna that Fig. 4 shows the embodiment of the present invention to be provided is in the schematic diagram of collapsed state.The external antenna part of mobile terminal divides 42 to be connected to antenna body 43 by signal feed 41 by antenna interconnecting piece to form unipole antenna form, and wherein antenna body 43 is in collapsed state, and length is much smaller than being 1/4th of required band wavelength.Coupling branch 45 presents point 44 by ground and is connected to tuning routing region.Because antenna body 43 is now placed in that mobile terminal is inner and impedance that is that can be coupled with the branch 45 that is coupled is larger, the parasitic coupling effect that coupling branch 45 pairs of antenna bodies 43 play is comparatively obvious, can by the frequency of antenna body 43 frequency deviation by parasitic couplings be tuned to required frequency range.
The structural representation that the external antenna that Fig. 5 shows the embodiment of the present invention to be provided pulls open, as shown in Figure 5, the signal feed 51 of mobile terminal divides 52 to be connected to the antenna body part be jointly made up of pull bar part 53, pull bar part 54, pull bar part 55, pull bar part 56, pull bar part 57 by antenna interconnecting piece.Wherein, pull bar part 53, pull bar part 54, pull bar part 55, pull bar part 56, pull bar part 57 are each pull bar parts of retractable aerial, form antenna body.Coupling branch is connected to antenna parasitic tuning part 59 by ground feedback point 58 and forms.The structural representation that the external antenna that Fig. 6 shows the embodiment of the present invention to be provided is packed up, wherein, the body part 61 of antenna and coupling branch 60.
Fig. 7 shows the schematic diagram of the standing wave of the built-in aerial that the embodiment of the present invention provides, and Fig. 8 shows the schematic diagram of the standing wave of the external antenna that the embodiment of the present invention provides; In the performance of antenna efficiency and standing wave, contrast common built-in aerial, as shown in Figure 7 and Figure 8, Fig. 7 is the S11 standing wave of built-in aerial, directly reflects the transmitting-receiving efficiency of common built-in aerial terminal Wi-Fi antenna.Fig. 8 is the S11 standing wave of external antenna, directly reflects the transmitting-receiving efficiency of this external antenna terminal Wi-Fi antenna.From standing wave depth correlation, external antenna is obviously high than built-in aerial in the standing wave degree of depth of required frequency (2.4GHz), and from the performance of antenna, starting efficiency of external antenna terminal is apparently higher than built-in aerial terminal.From the covering of bandwidth, because the headroom environment of external antenna is relatively better, the bandwidth that same level can cover is larger than built-in aerial, from the performance of antenna external antenna equal conditions under effective transmission speed and received signal strength stronger than built-in aerial terminal.
Fig. 9 shows the radiation pattern of common built-in aerial terminal of the prior art, and Figure 10 shows the radiation pattern of the external antenna terminal that the embodiment of the present invention provides; From the performance of antenna directivity, contrast common built-in aerial, if Fig. 9 and Figure 10, Fig. 9 are the radiation patterns of common built-in aerial terminal, wherein 90 is common built-in aerial mobile terminal, and 91 and 92 is the antenna pattern of built-in aerial electromagnetic field.Figure 10 is the radiation pattern of external antenna terminal, and wherein 100 is external antenna mobile terminal, and 101 and 102 is the antenna pattern of external antenna electromagnetic field.From the contrast of radiation direction, common built-in aerial terminal due to the headroom of antenna poor, electromagnetism and the metal device environment of periphery are more complicated, cannot accomplish omnidirectional radiation.In the performance of antenna, the signal of common built-in aerial terminal can die down in certain direction.External antenna terminal is exposed to free space due to antenna, and the headroom of antenna is better, and away from electromagnetic interference and metal device, can accomplish good omnidirectional radiation.In the performance of antenna, external antenna terminal is good in omnidirectional performance.
Visible, interior external antenna combines by the embodiment of the present invention on sky Wiring technology, achieves both good compatibilities.By external antenna design on mobile terminals, improve antenna transmitting-receiving efficiency, Consumer's Experience has had the lifting of matter.By the design of external extensible antenna and built-in parasitic couplings tuner section, perfection solves the design challenges that external antenna packs up aft antenna frequency deviation, makes the transmitting-receiving efficiency of antenna after packing up poor unlike common built-in aerial.The combinations of two kinds of designs, antenna is had concurrently simultaneously can built-in, function that can be external.
Last it is noted that above embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
The scheme that the embodiment of the present invention provides is the lifting innovated on current built-in Wi-Fi antenna form, the innovative design of the body of antenna, especially tuning part is irreplaceable, especially it should be noted that, the scheme that the embodiment of the present invention provides is different from double antenna design, but a kind of single antenna design of compatible design of interior external antenna.
The coupling branch that the embodiment of the present invention provides for generation of the mutual impedance with antenna body, thus realizes carrying out tunning effect to the operating frequency of antenna body.
The design principle of coupling branch is described in the mode of only illustrating below.
Circuit diagram between the coupling branch that Figure 11 provides for the embodiment of the present invention and antenna body, as shown in figure 11, the mutual impedance between coupling branch and antenna body
Wherein, Z
12represent the mutual impedance that antenna body produces coupling branch, Z
21represent the mutual impedance that coupling branch produces antenna body; V
12represent the electrical potential difference at coupling branch two ends, V
21represent the electrical potential difference at antenna body two ends, I
1represent the current value flowing through antenna body, I
2represent the current value flowing through coupling branch.
Due to
wherein, z is antenna length; I
zrepresent when the antenna length of antenna body is z, flow through the parasite current value of this antenna body.
Due to I
z=I
zsin β z, wherein, β is antenna phase;
Can draw,
wherein, E
21represent the parasitic field intensity of coupling branch;
Relation from electromagnetic field far field antenna, field intensity E and electric current I:
Wherein, Figure 12 shows the schematic diagram of the aerial angle in the embodiment of the present invention, as shown in figure 12, β is antenna phase, and L is antenna body length, and L' is coupling branch length, θ is aerial angle, j (representative is mathematically the imaginary part of plural form, i.e. phase difference).
Can be derived by above-mentioned formula:
Due to, in general, in order at utmost ensure antenna radiation efficiency and eliminate return loss (namely eliminating imaginary part part), the resistance value of antenna needs adjustment at Z
21ideal value:
According to above-mentioned formula, mutual impedance is relevant to antenna length, the branch length that is coupled and distance between the two.
For example, the impedance of antenna body is defaulted as 50 ohm, and mutual impedance increases due to parasitism in this impedance.
When antenna be in pull open state time, the impedance of antenna body is 40 ohm, and the branch that is such as now coupled creates the mutual impedance of 10 ohm, thus when antenna pulls open the resonance impedance of antenna at 50 ohm.So, the embodiment of the present invention can debug 2.4GHz antenna frequency according to this impedance.
When antenna is in collapsed state, because antenna length is short, antenna body resonance impedance diminishes, such as antenna is owing to shortening, the resonance impedance of antenna body becomes 45 ohm, but mutual impedance knows clearly 5 ohm because the shorter reason of antenna body length now becomes just, and antenna resonance impedance still remains on 50 ohm, thus working frequency points still to remain on 2.4GHz constant.
On the other hand, due to the capacitor and inductor characteristics determined impedance operator of coupling branch or antenna body self, the relation about antenna length and impedance can be understood as with inductance, electric capacity angle:
L*C*(2πf)∧2＝1
Therefore, antenna body shortens, and own inductance capacitance changes, and frequency also changes.
In addition, the relation of antenna resonance impedance (total impedance) and antenna effective feeling capacitance can be:
Z＝sqrp(L/C)
Wherein, sqrp is that square root calculates;
Therefore, antenna body shortens, and its operational resonant impedance also changes, and therefore frequency also changes.
It should be noted that, the length of coupling branch can be 1/2nd of the girth of coupling branch (being applicable to planar antenna, the irregular planar antenna of rule), but the change of the shape of coupling branch is to change length and the distance between it and antenna body.The effective length of coupling branch and directly determine the frequency deviation amplitude of antenna in length change situation with the distance of antenna, the branch design that is that is effectively coupled can offset antenna length much smaller than the frequency deviation in quarter-wave situation.
In embodiments of the present invention, coupling branch can be made up of regular metal material, also can be made up of irregular metal material, as Figure 13 a ~ Figure 13 d respectively illustrates the schematic diagram of the coupling branch be made up of four kinds of difform metal materials, visible, although the coupling branch that the embodiment of the present invention provides is various informative, as long as keep the spacing of cabling and antenna just can carry out resonance to the working frequency points of antenna.That is, coupling branch with the distance r between described single-frequency telescopic antenna body can be: the distance between the pole plate of the closest described single-frequency telescopic antenna body in branch that is coupled and single-frequency telescopic antenna body.
As another preferred embodiment, the embodiment of the present invention can also will be connected on same feedback point while coupling branch and antenna body, be connected with the circuit board of terminal, at this moment, antenna body and coupling branch become the Liang Ge branch of antenna respectively, no longer carry out parasitic couplings, all at 2.4GHz, when pulling open, external antenna signal is good, and when packing up, built-in branch signal is good, and in actual applications, aerial signal can look for the forked working that signal is good automatically.
It should be noted that, in embodiments of the present invention, the target frequency of antenna can be moved to as 2.4GHz, 5GHz and other target frequencies by antenna body and coupling branch, repeats no longer one by one here.
Based on identical know-why, the embodiment of the present invention provides a kind of aerial signal tuner of terminal, and Figure 14 shows the structural representation of the aerial signal tuner of a kind of terminal that the embodiment of the present invention provides, and this device comprises:
Single-frequency telescopic antenna body 141, is connected with the circuit board of described terminal by the first feedback point, for when described single-frequency telescopic antenna body 141 is in different conditions, launches after the branch 142 that is coupled is tuning and has the wireless signal of target frequency;
Described coupling branch 142, be connected with the circuit board of described terminal by the second feedback point, for the mutual impedance value utilizing the resistance value of described single-frequency telescopic antenna body 141 when being in different conditions and described coupling branch 142 to produce described single-frequency telescopic antenna body 141, the wireless signal launched when being in different conditions to described single-frequency telescopic antenna body 141 carries out tuning.
Optionally, described coupling branch 142 specifically for: when described single-frequency telescopic antenna body 141 is in complete collapsed state or apart state, according to the first resistance value under described single-frequency telescopic antenna body 141 current state, determine the first mutual impedance value that described coupling branch 142 produces described single-frequency telescopic antenna body 141, carry out tuning to the wireless signal that the single-frequency telescopic antenna body 141 being in complete collapsed state or apart state is launched; Wherein, described first resistance value becomes positive correlation with the antenna length of described single-frequency telescopic antenna body 141.
Optionally, described coupling branch 142 specifically for: according to the effective length L' of the antenna length L of described single-frequency telescopic antenna body 141 and aerial angle θ, described coupling the branch 142 and distance r between described coupling branch 142 and described single-frequency telescopic antenna body 141, determine when described single-frequency telescopic antenna body 141 is in complete collapsed state or apart state, the mutual impedance Z that described coupling branch 142 produces described single-frequency telescopic antenna body 141
21; Wherein, the single-frequency telescopic antenna body 141 being in different conditions described in has different antenna length L; The effective length L' of described coupling branch 142 determines according to the girth of described coupling branch 142.
Optionally, described coupling branch 142 impedance Z that described single-frequency telescopic antenna body 141 is produced
21positive correlation is become with the antenna length L of described single-frequency telescopic antenna body 141.
Optionally, described coupling branch 142 specifically for: determine when described single-frequency telescopic antenna body 141 is in complete collapsed state or apart state according to following formula one, the impedance Z that described coupling branch 142 produces described single-frequency telescopic antenna body 141
21; Described formula one is:
Optionally, described coupling branch 142 is made up of regular shape or erose metal material; Described coupling branch 142 is specially with the distance r between described single-frequency telescopic antenna body 141: the distance between the pole plate of the described closest described single-frequency telescopic antenna body 141 be coupled in branch 142 and described single-frequency telescopic antenna body 141.
Based on identical know-why, the embodiment of the present invention provides a kind of terminal, and Figure 15 shows the structural representation of a kind of terminal that the embodiment of the present invention provides, and this terminal comprises: the aerial signal tuner 151 of terminal and terminal body 152.
As can be seen from technique scheme, the aerial signal tuner of the terminal that the embodiment of the present invention provides has single-frequency telescopic antenna body and coupling branch, wherein single-frequency telescopic antenna body, be arranged at exterior of terminal can pulling open or pack up, coupling branch be used for described single-frequency telescopic antenna body be in pull open or collapsed state time the wireless signal launched carry out tuning.When single-frequency telescopic antenna body be in pull open state time, because antenna length is longer, coupling branch and the coupling area accounting of antenna relatively little, can not produce a very large impact the frequency of antenna, now be equivalent to external telescopic antenna and work independently; When single-frequency telescopic antenna body is in collapsed state, because antenna length is shorter, the coupling area accounting of coupling branch and antenna is relatively large, the wireless signal of frequency deviation can be withdrawn into target frequency, thus solve the frequency deviation problem that external telescopic antenna produces when packing up, and then provide a kind of can external, antenna assembly that can be built-in, improve the radio-frequency performance of terminal.
The present invention describes with reference to according to the flow chart of the method for the embodiment of the present invention, equipment (system) and computer program and/or block diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can be provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device, make the function that the instruction that performed by the processor of this computer or other programmable data processing device can be specified in a flow process in realization flow figure or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable devices is provided for the step realizing the function of specifying in a flow process of flow chart or a square frame of multiple flow process and/or block diagram or multiple square frame.
Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (7)
1. an aerial signal tuner for terminal, is characterized in that, this device comprises:
Single-frequency telescopic antenna body, is connected with the circuit board of described terminal by the first feedback point, for when described single-frequency telescopic antenna body is in different conditions, launches after the branch that is coupled is tuning and has the wireless signal of target frequency;
Described coupling branch, be connected with the circuit board of described terminal by the second feedback point, for the mutual impedance value utilizing the resistance value of described single-frequency telescopic antenna body when being in different conditions and described coupling branch to produce described single-frequency telescopic antenna body, when being in different conditions to described single-frequency telescopic antenna body, the impedance of required frequency is carried out tuning.
2. device as claimed in claim 1, is characterized in that, described coupling branch specifically for:
When described single-frequency telescopic antenna body is in complete collapsed state or apart state, according to the first resistance value under described single-frequency telescopic antenna body current state, determine the first mutual impedance value that described coupling branch produces described single-frequency telescopic antenna body, carry out tuning to the wireless signal that the single-frequency telescopic antenna body being in complete collapsed state or apart state is launched;
Wherein, described first resistance value becomes positive correlation with the antenna length of described single-frequency telescopic antenna body.
3. device as claimed in claim 2, is characterized in that, described coupling branch specifically for:
According to antenna length L and aerial angle θ, the effective length L' of described coupling branch and the distance r between described coupling branch and described single-frequency telescopic antenna body of described single-frequency telescopic antenna body, determine when described single-frequency telescopic antenna body is in complete collapsed state or apart state, the mutual impedance Z that described coupling branch produces described single-frequency telescopic antenna body
21;
Wherein, the single-frequency telescopic antenna body being in different conditions described in has different antenna length L; The effective length L' of described coupling branch determines according to the girth of described coupling branch.
4. device as claimed in claim 3, is characterized in that, the impedance Z that described coupling branch produces described single-frequency telescopic antenna body
21positive correlation is become with the antenna length L of described single-frequency telescopic antenna body.
5. device as claimed in claim 4, is characterized in that, described coupling branch specifically for:
Determine when described single-frequency telescopic antenna body is in complete collapsed state or apart state according to following formula one, the mutual impedance Z that described coupling branch produces described single-frequency telescopic antenna body
21;
Described formula one is:
6. the device according to any one of claim 1-5, is characterized in that, described coupling branch is made up of regular shape or erose metal material;
Distance r between described coupling branch and described single-frequency telescopic antenna body is specially:
Distance between the pole plate of the closest described single-frequency telescopic antenna body in described coupling branch and described single-frequency telescopic antenna body.
7. a terminal, is characterized in that, this terminal comprises: the aerial signal tuner of the terminal as described in claim 1-6 and terminal body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510375231.5A CN104953286B (en) | 2015-06-30 | 2015-06-30 | The aerial signal tuner and terminal of a kind of terminal |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510375231.5A CN104953286B (en) | 2015-06-30 | 2015-06-30 | The aerial signal tuner and terminal of a kind of terminal |
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| CN104953286A true CN104953286A (en) | 2015-09-30 |
| CN104953286B CN104953286B (en) | 2018-06-19 |
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| CN114157327B (en) * | 2021-11-30 | 2023-08-15 | 北京交大思诺科技股份有限公司 | Antenna design method for improving action range |
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