CN204334560U - Antenna tuning unit and antenna tuning system - Google Patents
Antenna tuning unit and antenna tuning system Download PDFInfo
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- CN204334560U CN204334560U CN201420634365.5U CN201420634365U CN204334560U CN 204334560 U CN204334560 U CN 204334560U CN 201420634365 U CN201420634365 U CN 201420634365U CN 204334560 U CN204334560 U CN 204334560U
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Abstract
The utility model discloses a kind of antenna tuning unit, the input of antenna tuning unit and output are coupled with radio circuit and antenna respectively, and antenna tuning unit comprises: controllable impedance module; And tunable capacitor module, tunable capacitor module is connected with controllable impedance module, tunable capacitor module comprises switching device and multiple electric capacity submodule, wherein, switching device be used under control of the control signal at least one the electric capacity submodule switched in multiple electric capacity submodule be connected with controllable impedance module.Antenna tuning unit of the present utility model can make the not high antenna of inductance precision meet the condition of resonance of resonant tank, thus reduce the scrappage of antenna and the operating time of extension antenna, effectively reduce production and the use cost of antenna, and the resonant tank of resonance can be made to obtain better resonance point, the reliability of resonant tank increases greatly.The invention also discloses a kind of antenna tuning system comprising this antenna tuning unit.
Description
Technical field
The utility model relates to electric vehicle engineering field, particularly a kind of antenna tuning unit and a kind of antenna tuning system.
Background technology
Flourish along with wireless technology, antenna applications is to the every field in life.At present, usual employing LC loop is used as the resonant tank of antenna, but LC loop generally takes single electric capacity and inductor combination to form, this certainly will require that antenna manufacturer manufactures high accuracy such as inductance precision is the antenna of less than 2%, but the manufacturing process due to current antenna cannot reach very high inductance precision, and electric capacity and there is certain error between inductance actual value and calibration value, often cause the scrappage of antenna to remain high, cause production cost greatly to increase.Therefore, need to improve the resonant tank of antenna.
Utility model content
The purpose of this utility model is intended to solve one of above-mentioned technical problem at least to a certain extent.
For this reason, an object of the present utility model is to propose a kind of antenna tuning unit, this antenna tuning unit can make the not high antenna of inductance precision meet the condition of resonance of resonant tank, thus reduce the scrappage of antenna and the operating time of extension antenna, and effectively reduce production and the use cost of antenna.
Another object of the present utility model is to propose a kind of antenna tuning system.
For achieving the above object, the utility model proposes a kind of antenna tuning unit on the one hand, and the input of described antenna tuning unit and output are coupled with radio circuit and antenna respectively, and described antenna tuning unit comprises: controllable impedance module; And tunable capacitor module, described tunable capacitor module is connected with described controllable impedance module, described tunable capacitor module comprises switching device and multiple electric capacity submodule, wherein, described switching device be used under control of the control signal at least one the electric capacity submodule switched in described multiple electric capacity submodule be connected with described controllable impedance module.
The antenna tuning unit that the utility model proposes controls switching device by control signal and switches at least one electric capacity submodule in multiple electric capacity submodule and to be connected with controllable impedance module the capacitance changed in resonant tank, and then changes the inductance range of antenna.This antenna tuning unit can make the not high antenna of inductance precision meet the condition of resonance of resonant tank, thus reduces the scrappage of antenna and the operating time of extension antenna, and effectively reduces production and the use cost of antenna.
Further, described multiple electric capacity submodule comprises: the first electric capacity submodule, and one end of described first electric capacity submodule is connected with described controllable impedance module; Second electric capacity submodule, one end of described second electric capacity submodule is connected with the other end of described first electric capacity submodule, and the other end and the described antenna of described second electric capacity submodule are coupled; And the 3rd electric capacity submodule, described 3rd electric capacity submodule is connected with described second electric capacity submodule.
Further, described first electric capacity submodule comprises: the first electric capacity, one end of described first electric capacity is connected with described controllable impedance module, the other end of described first electric capacity is connected with one end of described second electric capacity submodule, has first node between described first electric capacity and described controllable impedance module; And first resistance, described first resistance and described first Capacitance parallel connection.
Further, described second electric capacity submodule comprises: the second electric capacity, and one end of described second electric capacity is connected with the other end of described first electric capacity, has Section Point between described second electric capacity and described first electric capacity; 3rd electric capacity, one end of described 3rd electric capacity is connected with the other end of described second electric capacity, and the other end and the described antenna of described 3rd electric capacity are coupled, and have the 3rd node between described second electric capacity and described 3rd electric capacity; And the second resistance of mutually series connection and the 3rd resistance, described second resistance and described second Capacitance parallel connection, described second resistance and described first resistant series, described 3rd resistance and described 3rd Capacitance parallel connection.
Further, described 3rd electric capacity submodule comprises: the 4th electric capacity, and one end of described 4th electric capacity is connected with described 3rd node; 5th electric capacity, one end of described 5th electric capacity is connected with the other end of described 4th electric capacity; 4th resistance, described 4th resistance and described 4th Capacitance parallel connection; And the 5th resistance, described 5th resistance and described 5th Capacitance parallel connection.
Further, the capacitance of described second electric capacity is equal with the capacitance of described 3rd electric capacity, the capacitance of described 4th electric capacity is equal with the capacitance of described 5th electric capacity, and the capacitance of described 4th electric capacity is less than the capacitance of described second electric capacity, the capacitance of described second electric capacity is less than the capacitance of described first electric capacity.
Further, described switching device comprises the first binding post to the 5th binding post or single pole multiple throw.
Further, when described switching device is single pole multiple throw, the common port of described single pole multiple throw is connected with described Section Point, the first end of described single pole multiple throw is connected with described first node, second end of described single pole multiple throw is connected with the other end of described 4th electric capacity, and the 3rd end of described single pole multiple throw is connected with the other end of described 5th electric capacity.
Further, when described switching device be the first binding post to the 5th binding post time, described first binding post is connected with described Section Point, described second binding post is connected with described first node, described 3rd binding post is connected with the other end of described 4th electric capacity, described 4th binding post is connected with the other end of described 5th electric capacity, and described 5th binding post is unsettled.
For achieving the above object, the utility model also proposed a kind of antenna tuning system on the other hand, and this antenna tuning system comprises: radio circuit and antenna; And described antenna tuning unit, the input of described antenna tuning unit and output are coupled with described radio circuit and described antenna respectively.
The antenna tuning system that the utility model proposes changes the inductance range of antenna to reduce the requirement of resonant tank to inductance precision by antenna tuning unit.This antenna tuning system can make the not high antenna of inductance precision meet the condition of resonance of resonant tank, thus reduces the scrappage of antenna and the operating time of extension antenna, and effectively reduces production and the use cost of antenna.
The aspect that the utility model is additional and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present utility model.
Accompanying drawing explanation
The utility model above-mentioned and/or additional aspect and advantage will become obvious and easy understand from the following description of the accompanying drawings of embodiments, wherein:
Fig. 1 is the block diagram of the antenna tuning unit according to the utility model embodiment;
Fig. 2 is the structural representation of the antenna tuning unit according to the utility model embodiment; And
Fig. 3 is the block diagram of the antenna tuning system according to the utility model embodiment.
Embodiment
Be described below in detail embodiment of the present utility model, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the utility model, and can not being interpreted as restriction of the present utility model.
Disclosing hereafter provides many different embodiments or example is used for realizing different structure of the present utility model.Of the present utility model open in order to simplify, hereinafter the parts of specific examples and setting are described.Certainly, they are only example, and object does not lie in restriction the utility model.In addition, the utility model can in different example repeat reference numerals and/or letter.This repetition is to simplify and clearly object, itself does not indicate the relation between discussed various embodiment and/or setting.In addition, the various specific technique that the utility model provides and the example of material, but those of ordinary skill in the art can recognize the property of can be applicable to of other techniques and/or the use of other materials.In addition, fisrt feature described below second feature it " on " structure can comprise the embodiment that the first and second features are formed as directly contact, also can comprise other feature and be formed in embodiment between the first and second features, such first and second features may not be direct contacts.
In description of the present utility model, it should be noted that, unless otherwise prescribed and limit, term " installation ", " being connected ", " connection " should be interpreted broadly, such as, can be mechanical connection or electrical connection, also can be the connection of two element internals, can be directly be connected, also indirectly can be connected by intermediary, for the ordinary skill in the art, the concrete meaning of above-mentioned term can be understood as the case may be.
The antenna tuning unit and antenna tuning system that propose according to the utility model embodiment are described with reference to the accompanying drawings.
As shown in Figure 1, the input of the antenna tuning unit 1 of the utility model embodiment and output are coupled with radio circuit 2 and antenna 3 respectively, and antenna tuning unit 1 comprises: controllable impedance module 10 and tunable capacitor module 20.Wherein, tunable capacitor module 20 is connected with controllable impedance module 10, tunable capacitor module 20 comprises switching device 21 and multiple electric capacity submodule such as electric capacity submodule 221 to electric capacity submodule 22N, wherein, switching device 21 is connected with controllable impedance module 10 at least one the electric capacity submodule switched under control of the control signal in multiple electric capacity submodule, N be greater than 1 integer.
Further, in an embodiment of the present utility model, as shown in Figure 2, multiple electric capacity submodule can comprise: the first electric capacity submodule 221, second electric capacity submodule 222 and the 3rd electric capacity submodule 223.Wherein, one end of the first electric capacity submodule 221 is connected with controllable impedance module 10.One end of second electric capacity submodule 222 is connected with the other end of the first electric capacity submodule 221, and the other end and the antenna 3 of the second electric capacity submodule 222 are coupled.3rd electric capacity submodule 223 is connected with the second electric capacity submodule 222.
Further, in an embodiment of the present utility model, as shown in Figure 2, the first electric capacity submodule 221 can comprise: the first electric capacity C1 and the first resistance R1.Wherein, one end of first electric capacity C1 is connected with controllable impedance module 10, the other end of the first electric capacity C1 is connected with one end of the second electric capacity submodule 222, between first electric capacity C1 and controllable impedance module 10, there is first node J1, first electric capacity C1 can be 6.8nF, and controllable impedance module 10 can be controllable impedance L1.First resistance R1 is in parallel with the first electric capacity C1, and the first resistance R1 can be 1M Ω.
Further, in an embodiment of the present utility model, as shown in Figure 2, the second electric capacity submodule 222 can comprise: the second electric capacity C2, the 3rd electric capacity C3, the second resistance R2 and the 3rd resistance R3.Wherein, one end of the second electric capacity C2 is connected with the other end of the first electric capacity C1, has Section Point J2 between the second electric capacity C2 and the first electric capacity C1.One end of 3rd electric capacity C3 is connected with the other end of the second electric capacity C2, the other end and the antenna 3 of the 3rd electric capacity C3 are coupled, there is between second electric capacity C2 and the 3rd electric capacity C3 the 3rd node J3, second electric capacity C2 and the 3rd electric capacity C3 can be 6.8nF, and the other end of the 3rd electric capacity C3 can be coupled by connector JP1 and antenna 3.Second resistance R2 and the 3rd resistance R3 connects mutually, and the second resistance R2 is in parallel with the second electric capacity C2, and the second resistance R2 connects with the first resistance R1, and the 3rd resistance R3 is in parallel with the 3rd electric capacity C3, and the second resistance R2 and the 3rd resistance R3 can be 1M Ω.
Further, in an embodiment of the present utility model, as shown in Figure 2, the 3rd electric capacity submodule 223 can comprise: the 4th electric capacity C4, the 5th electric capacity C5, the 4th resistance R4 and the 5th resistance R5.Wherein, one end of the 4th electric capacity C4 is connected with the 3rd node J3.One end of 5th electric capacity C5 is connected with the other end of the 4th electric capacity C4, and the 4th electric capacity C4 and the 5th electric capacity C5 can be 3.3nF.4th resistance R4 is in parallel with the 4th electric capacity C4, and the 5th resistance R5 is in parallel with the 5th electric capacity C5, and the 4th resistance R4 and the 5th resistance R5 can be 1M Ω.Particularly, in an embodiment of the present utility model, as shown in Figure 2, the capacitance such as 6.8nF of the second electric capacity can be equal with the capacitance of the 3rd electric capacity, the capacitance such as 3.3nF of the 4th electric capacity can be equal with the capacitance of the 5th electric capacity, and the capacitance of the 4th electric capacity is less than the capacitance of the second electric capacity, the capacitance of the second electric capacity is less than the capacitance such as 68nF of the first electric capacity.Further, in an embodiment of the present utility model, as shown in Figure 2, switching device 21 can be connected with Section Point J2.Further, in an embodiment of the present utility model, switching device 21 can comprise: the first binding post JQ1, the second binding post JQ2, the 3rd binding post JQ3, the 4th binding post JQ4 and the 5th binding post JQ5 or jumper cap or single pole multiple throw etc.Further, in an embodiment of the present utility model, when switching device 21 is single pole multiple throw, the common port of single pole multiple throw can be connected with Section Point J2, the first end of single pole multiple throw can be connected with first node J1, second end of single pole multiple throw can be connected with the other end of the 4th electric capacity C4, and the 3rd end of single pole multiple throw can be connected with the other end of the 5th electric capacity C5.
Further, in an embodiment of the present utility model, as shown in Figure 2, when switching device 21 is the first binding post JQ1 to the 5th binding post JQ5, first binding post JQ1 can be connected with Section Point J2, and the second binding post JQ2 can be connected with first node J1, and the 3rd binding post JQ3 can be connected with the other end of the 4th electric capacity C4,4th binding post JQ4 can be connected with the other end of the 5th electric capacity C5, and the 5th binding post JQ5 can be unsettled.Particularly, in an embodiment of the present utility model, the first binding post JQ1, the second binding post JQ2, the 3rd binding post JQ3, the 4th binding post JQ4 and the 5th binding post JQ5 can be 520 binding posts.
As shown in Figure 2, controllable impedance L1 is connected with transformer L2, and after transformer L2 is connected with the 6th resistance R6, the 6th resistance R6 is coupled by connector JP2 and radio circuit 2, and the 6th resistance R6 can be 1M Ω.It should be noted that; in antenna tuning unit 1; in parallel with the first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3, the 4th electric capacity C4, the 5th electric capacity C5 respectively by the first resistance R1, the second resistance R2, the 3rd resistance R3, the 4th resistance R4, the 5th resistance R5; can power at resonant tank; after the electric charge that each capacitance stores is a large amount of; discharge when resonant tank power-off, thus avoid occurring that user is electrically shocked phenomenon, available protecting user personal safety.
It should be noted that, the condition of resonance formula from resonant tank: WL=1/WC, when the scope of the capacitance C in resonant tank increases, the scope of the inductance value L in resonant tank also increases.Further, in an embodiment of the present utility model, as shown in Figure 2, user can connect the second binding post JQ2 respectively by the first binding post JQ1, 3rd binding post JQ3, 4th binding post JQ4 and the 5th binding post JQ5, change the first electric capacity C1, second electric capacity C2, 3rd electric capacity C3, the connection in series-parallel state of the 4th electric capacity C4 and the 5th electric capacity C5, thus the capacitance C that can change in resonant tank and inductance value L, realize the inductance range changing antenna, and then for the antenna of a certain inductance value, the inductance precision making antenna just can reduce.
Particularly, as shown in Figure 2, when the first binding post JQ1 connects the 5th binding post JQ5, now, electric capacity in resonant tank can regard the first electric capacity C1 as, the fixed Combination of the second electric capacity C2 and the 3rd electric capacity C3, the total capacitance value C15=3.238nF of resonant tank, as resonance frequency f=134.2khz, condition of resonance formula according to resonant tank: WL=1/WC, the then total inductance value L15=434uH of resonant tank, the inductance range arranging controllable impedance L1 is 8uH-58uH, then the inductance range of antenna is 376uH-426uH, namely can manufacture inductance value when producing is 401uH, inductance precision is the antenna of 6.23%, if the capacitance C namely in resonant tank fixes, then the inductance precision of antenna need reach 6.23%.
Further, as shown in Figure 2, when the first binding post JQ1 connects the 3rd binding post JQ3, electric capacity in resonant tank is that the 4th electric capacity C4 is in parallel with the second electric capacity C2, then connect with the 3rd electric capacity C3 and the first electric capacity C1, the total capacitance value C13=3.8347nF of resonant tank, in like manner obtains the total inductance value L13=367.15uH of resonant tank, the inductance range arranging controllable impedance L1 is 8uH-58uH, then the inductance range of antenna is 309.15uH-359.15uH.
Further, as shown in Figure 2, when the first binding post JQ1 connects the 4th binding post JQ4, electric capacity in resonant tank is that the 4th electric capacity C4 and the 5th electric capacity C5 connect, then in parallel with the second electric capacity C2, finally connects with the 3rd electric capacity C3 and the first electric capacity C1, the total capacitance value C14=3.57nF of resonant tank, in like manner obtain the total inductance value L14=394.37uH of resonant tank, the inductance range arranging controllable impedance L1 is 8uH-58uH, then the inductance range of antenna is 336.37uH-386.37uH.
Further, as shown in Figure 2, when the first binding post JQ1 connects the second binding post JQ2, electric capacity in resonant tank is that the second electric capacity C2 and the 3rd electric capacity C3 connect, the total capacitance value C12=3.4nF of resonant tank, in like manner obtain the total inductance value L12=413uH of resonant tank, the inductance range arranging controllable impedance L1 is 8uH-58uH, then the inductance range of antenna is 355uH-405uH.
In sum, in resonant tank as shown in Figure 2, the inductance range of antenna is 310uH-426uH, namely can manufacture that inductance value is 401uH, inductance precision is the antenna of 14.46% when producing.As can be seen here, by increasing combination capacitor, and effective reduction resonant tank that the connection in series-parallel state changing electric capacity can be covert is to the inductance required precision of antenna.
The antenna tuning unit 1 of the utility model embodiment can provide better resonance point for the resonant tank of resonance, thus the reliability of resonant tank is increased greatly.In addition, when the electronic devices and components in resonant tank such as inductance, electric capacity etc. along with the time is aging gradually, the corresponding change of precision and when causing antenna product to lose efficacy, antenna tuning unit 1 is adopted to change the connection in series-parallel state of electric capacity to change the capacitance C in antenna resonance loop, thus also can regulate inductance precision, the operating time of extension antenna product.
The antenna tuning unit that the utility model proposes controls switching device by control signal and switches at least one electric capacity submodule in multiple electric capacity submodule and to be connected with controllable impedance module the capacitance changed in resonant tank, and then changes the inductance range of antenna.This antenna tuning unit can make the not high antenna of inductance precision meet the condition of resonance of resonant tank, thus reduce the scrappage of antenna and the operating time of extension antenna, effectively reduce production and the use cost of antenna, and the resonant tank of resonance can be made to obtain better resonance point, the reliability of resonant tank increases greatly.
The utility model also proposed a kind of antenna tuning system on the other hand, and as shown in Figure 3, this antenna tuning system comprises: antenna tuning unit 1, radio circuit 2 and antenna 3.Wherein, the input of antenna tuning unit 1 and output are coupled with radio circuit 2 and antenna 3 respectively.
The antenna tuning system that the utility model proposes changes the inductance range of antenna to reduce the requirement of resonant tank to inductance precision by antenna tuning unit.This antenna tuning system can make the not high antenna of inductance precision meet the condition of resonance of resonant tank, thus reduce the scrappage of antenna and the operating time of extension antenna, effectively reduce production and the use cost of antenna, and the resonant tank of resonance can be made to obtain better resonance point, the reliability of resonant tank increases greatly.
Describe and can be understood in flow chart or in this any process otherwise described or method, represent and comprise one or more for realizing the module of the code of the executable instruction of the step of specific logical function or process, fragment or part, and the scope of preferred implementation of the present utility model comprises other realization, wherein can not according to order that is shown or that discuss, comprise according to involved function by the mode while of basic or by contrary order, carry out n-back test, this should understand by embodiment person of ordinary skill in the field of the present utility model.
In flow charts represent or in this logic otherwise described and/or step, such as, the sequencing list of the executable instruction for realizing logic function can be considered to, may be embodied in any computer-readable medium, for instruction execution system, device or equipment (as computer based system, comprise the system of processor or other can from instruction execution system, device or equipment instruction fetch and perform the system of instruction) use, or to use in conjunction with these instruction execution systems, device or equipment.With regard to this specification, " computer-readable medium " can be anyly can to comprise, store, communicate, propagate or transmission procedure for instruction execution system, device or equipment or the device that uses in conjunction with these instruction execution systems, device or equipment.The example more specifically (non-exhaustive list) of computer-readable medium comprises following: the electrical connection section (electronic installation) with one or more wiring, portable computer diskette box (magnetic device), random access memory (RAM), read-only memory (ROM), erasablely edit read-only memory (EPROM or flash memory), fiber device, and portable optic disk read-only memory (CDROM).In addition, computer-readable medium can be even paper or other suitable media that can print described program thereon, because can such as by carrying out optical scanner to paper or other media, then carry out editing, decipher or carry out process with other suitable methods if desired and electronically obtain described program, be then stored in computer storage.
Should be appreciated that each several part of the present utility model can realize with hardware, software, firmware or their combination.In the above-described embodiment, multiple step or method can with to store in memory and the software performed by suitable instruction execution system or firmware realize.Such as, if realized with hardware, the same in another embodiment, can realize by any one in following technology well known in the art or their combination: the discrete logic with the logic gates for realizing logic function to data-signal, there is the application-specific integrated circuit (ASIC) of suitable combinational logic gate circuit, programmable gate array (PGA), field programmable gate array (FPGA) etc.
Those skilled in the art are appreciated that realizing all or part of step that above-described embodiment method carries is that the hardware that can carry out instruction relevant by program completes, described program can be stored in a kind of computer-readable recording medium, this program perform time, step comprising embodiment of the method one or a combination set of.
In addition, each functional unit in each embodiment of the utility model can be integrated in a processing module, also can be that the independent physics of unit exists, also can be integrated in a module by two or more unit.Above-mentioned integrated module both can adopt the form of hardware to realize, and the form of software function module also can be adopted to realize.If described integrated module using the form of software function module realize and as independently production marketing or use time, also can be stored in a computer read/write memory medium.
The above-mentioned storage medium mentioned can be read-only memory, disk or CD etc.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present utility model or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and described embodiment of the present utility model, for the ordinary skill in the art, be appreciated that and can carry out multiple change, amendment, replacement and modification to these embodiments when not departing from principle of the present utility model and spirit, scope of the present utility model is by claims and equivalency thereof.
Claims (10)
1. an antenna tuning unit, is characterized in that, the input of described antenna tuning unit and output are coupled with radio circuit and antenna respectively, and described antenna tuning unit comprises:
Controllable impedance module; And
Tunable capacitor module, described tunable capacitor module is connected with described controllable impedance module, described tunable capacitor module comprises switching device and multiple electric capacity submodule, wherein, described switching device be used under control of the control signal at least one the electric capacity submodule switched in described multiple electric capacity submodule be connected with described controllable impedance module.
2. antenna tuning unit as claimed in claim 1, it is characterized in that, described multiple electric capacity submodule comprises:
First electric capacity submodule, one end of described first electric capacity submodule is connected with described controllable impedance module;
Second electric capacity submodule, one end of described second electric capacity submodule is connected with the other end of described first electric capacity submodule, and the other end and the described antenna of described second electric capacity submodule are coupled; And
3rd electric capacity submodule, described 3rd electric capacity submodule is connected with described second electric capacity submodule.
3. antenna tuning unit as claimed in claim 2, it is characterized in that, described first electric capacity submodule comprises:
First electric capacity, one end of described first electric capacity is connected with described controllable impedance module, and the other end of described first electric capacity is connected with one end of described second electric capacity submodule, has first node between described first electric capacity and described controllable impedance module; And
First resistance, described first resistance and described first Capacitance parallel connection.
4. antenna tuning unit as claimed in claim 3, it is characterized in that, described second electric capacity submodule comprises:
Second electric capacity, one end of described second electric capacity is connected with the other end of described first electric capacity, has Section Point between described second electric capacity and described first electric capacity;
3rd electric capacity, one end of described 3rd electric capacity is connected with the other end of described second electric capacity, and the other end and the described antenna of described 3rd electric capacity are coupled, and have the 3rd node between described second electric capacity and described 3rd electric capacity; And
Second resistance of mutual series connection and the 3rd resistance, described second resistance and described second Capacitance parallel connection, described second resistance and described first resistant series, described 3rd resistance and described 3rd Capacitance parallel connection.
5. antenna tuning unit as claimed in claim 4, it is characterized in that, described 3rd electric capacity submodule comprises:
4th electric capacity, one end of described 4th electric capacity is connected with described 3rd node;
5th electric capacity, one end of described 5th electric capacity is connected with the other end of described 4th electric capacity;
4th resistance, described 4th resistance and described 4th Capacitance parallel connection; And
5th resistance, described 5th resistance and described 5th Capacitance parallel connection.
6. antenna tuning unit as claimed in claim 5, it is characterized in that, the capacitance of described second electric capacity is equal with the capacitance of described 3rd electric capacity, the capacitance of described 4th electric capacity is equal with the capacitance of described 5th electric capacity, and the capacitance of described 4th electric capacity is less than the capacitance of described second electric capacity, the capacitance of described second electric capacity is less than the capacitance of described first electric capacity.
7. antenna tuning unit as claimed in claim 5, it is characterized in that, described switching device comprises the first binding post to the 5th binding post or single pole multiple throw.
8. antenna tuning unit as claimed in claim 7, it is characterized in that, when described switching device is single pole multiple throw, the common port of described single pole multiple throw is connected with described Section Point, the first end of described single pole multiple throw is connected with described first node, second end of described single pole multiple throw is connected with the other end of described 4th electric capacity, and the 3rd end of described single pole multiple throw is connected with the other end of described 5th electric capacity.
9. antenna tuning unit as claimed in claim 7, it is characterized in that, when described switching device be the first binding post to the 5th binding post time, described first binding post is connected with described Section Point, second binding post is connected with described first node, 3rd binding post is connected with the other end of described 4th electric capacity, and the 4th binding post is connected with the other end of described 5th electric capacity, and described 5th binding post is unsettled.
10. an antenna tuning system, is characterized in that, comprising:
Radio circuit and antenna; And
Antenna tuning unit as claimed in any one of claims 1-9 wherein, the input of described antenna tuning unit and output are coupled with described radio circuit and described antenna respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420634365.5U CN204334560U (en) | 2014-10-28 | 2014-10-28 | Antenna tuning unit and antenna tuning system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420634365.5U CN204334560U (en) | 2014-10-28 | 2014-10-28 | Antenna tuning unit and antenna tuning system |
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| CN204334560U true CN204334560U (en) | 2015-05-13 |
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| CN201420634365.5U Expired - Fee Related CN204334560U (en) | 2014-10-28 | 2014-10-28 | Antenna tuning unit and antenna tuning system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112086746A (en) * | 2020-09-04 | 2020-12-15 | Tcl通讯（宁波）有限公司 | Structure and method for expanding antenna bandwidth and mobile terminal |
| WO2023072080A1 (en) * | 2021-10-27 | 2023-05-04 | 维沃移动通信有限公司 | Antenna adjustment circuit, resonant frequency adjustment method, and electronic device |
-
2014
- 2014-10-28 CN CN201420634365.5U patent/CN204334560U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112086746A (en) * | 2020-09-04 | 2020-12-15 | Tcl通讯（宁波）有限公司 | Structure and method for expanding antenna bandwidth and mobile terminal |
| WO2023072080A1 (en) * | 2021-10-27 | 2023-05-04 | 维沃移动通信有限公司 | Antenna adjustment circuit, resonant frequency adjustment method, and electronic device |
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Granted publication date: 20150513 Termination date: 20201028 |