CN105490025A - Antenna frequency band adjusting apparatus and method - Google Patents
Antenna frequency band adjusting apparatus and method Download PDFInfo
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- CN105490025A CN105490025A CN201610000918.5A CN201610000918A CN105490025A CN 105490025 A CN105490025 A CN 105490025A CN 201610000918 A CN201610000918 A CN 201610000918A CN 105490025 A CN105490025 A CN 105490025A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q23/00—Antennas with active circuits or circuit elements integrated within them or attached to them
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Abstract
The invention discloses an antenna frequency band adjusting apparatus and method. The antenna frequency band adjusting apparatus comprises an antenna body, a parasitic antenna, a CPU arranged on a PCB, a radio frequency transceiving module and a selection control module, wherein the CPU controls the connecting state of the selection control module according to a current working frequency band, and connects the parasitic antenna or the antenna body with the radio frequency transceiving module through the selection control module so as to enable the parasitic antenna or the antenna body to transmit and receive signals; therefore, the length of the antenna can be changed automatically; consequently, the bandwidth of the antenna can be widened effectively without changing the antenna space and the antenna size; and in addition, the working frequency band of the antenna can be changed, and the radiation performance of the antenna can be improved.
Description
Technical field
The present invention relates to the antenna design techniques field of electronic product, particularly a kind of antenna band adjusting device and method thereof.
Background technology
Along with the development of the communication technology, the communication apparatus such as mobile phone have become the requisite equipment of people.And LTE(LongTermEvolution, Long Term Evolution, is commonly called as 4G) technology become the technical requirement of new cell-phone indispensability.LTE frequency range is various, and in order to add more function in the communication apparatus such as mobile phone, and will meet slimming development trend, mobile phone does thinner and thinner, can compress antenna space like this, improves the requirement to Antenna Design and difficulty.
As shown in Figure 1, radio-frequency (RF) receiving and transmission module 50010 connects antenna body 30 by the match circuit 20 of antenna to the conventional aerial design frame chart of the communication apparatus such as current mobile phone.Antenna area 40 generally does headroom process, and be also provided with the passive antenna 50 that to be connected with the ground on pcb board in antenna area 40, the effect of passive antenna 50 mainly widens the beamwidth of antenna, promotes antenna performance.Wherein, the large area region below antenna area 40 is ground.Existing antenna size is fixed as can be seen from Figure 1, can not change its working frequency range, can not effectively spreading antenna bandwidth and promote radiance.
In view of this, the invention provides a kind of antenna band adjusting device and method thereof.
Summary of the invention
In view of above-mentioned the deficiencies in the prior art part, the object of the present invention is to provide a kind of antenna band adjusting device and method thereof, to solve the problem that existing antenna can not change working frequency range and spreading antenna bandwidth.
In order to achieve the above object, this invention takes following technical scheme:
A kind of antenna band adjusting device, comprises antenna body, passive antenna, is arranged on CPU on pcb board and radio-frequency (RF) receiving and transmission module, wherein, described pcb board is also provided with selection control module;
Described CPU controls according to current working frequency range the connection status selecting control module, selects passive antenna or antenna body to be connected with radio-frequency (RF) receiving and transmission module by selecting control module, with host age preference antenna or antenna body receiving and transmitting signal.
In described antenna band adjusting device, described antenna body comprises the first feedback point and the second feedback point; First feedback point of described antenna body connects the first selecting side selecting control module, second feedback point of antenna body connects the second selecting side selecting control module, passive antenna connects the 3rd selecting side selecting control module, radio-frequency (RF) receiving and transmission module connects the first control end and second control end of transmission ends and CPU, the CPU connection selection control module selecting control module.
In described antenna band adjusting device, described selection control module comprises the first switch, second switch, the first match circuit, the second match circuit, the 3rd match circuit and the 4th match circuit;
1st pin of described first switch connects radiofrequency emitting module, 2nd pin of the first switch connects one end of the second match circuit, the other end of the second match circuit connects the second feedback point of antenna body, 3rd pin of the first switch connects one end of the first match circuit, the other end of the first match circuit connects the first feedback point of antenna body, 4th pin of the first switch connects one end of the 3rd match circuit, the control pin of the first switch connects CPU, 1st pin of second switch connects passive antenna, 2nd pin of second switch connects the other end of the 3rd match circuit, 3rd pin of second switch connects one end of the 4th match circuit, the other end ground connection of the 4th match circuit, the control pin of second switch connects CPU.
In described antenna band adjusting device, described connection status comprises:
First connection status: the 1st pin of the first switch is connected with the 3rd pin, the 1st pin of second switch is connected with the 3rd pin;
Second connection status: the 1st pin of the first switch is connected with the 2nd pin, the 1st pin of second switch is connected with the 3rd pin;
3rd connection status: the 1st pin of the first switch is connected with the 4th pin, the 1st pin of second switch is connected with the 2nd pin.
In described antenna band adjusting device, antenna cover ultralow frequency under described first connection status, antenna cover low frequency and intermediate frequency under the second connection status, antenna cover high frequency under the 3rd connection status.
A kind of antenna band method of adjustment, it comprises:
CPU search network when A, start is also registered, and selects control module to be defaulted as the second connection status, is connected by second of antenna body the feedback point with radio-frequency (RF) receiving and transmission module;
B, CPU control according to current working frequency range the connection status selecting control module, select passive antenna or antenna body to be connected with radio-frequency (RF) receiving and transmission module by selecting control module.
In described antenna band method of adjustment, described step B specifically comprises:
B1, CPU read the working frequency range of radio-frequency (RF) receiving and transmission module, judge this working frequency range whether in low frequency or intermediate-frequency band: be keep the second current connection status, continue to perform step B1; Otherwise perform step B2;
B2, search for current available network and judge this working frequency range within the scope of ultralow frequency or high-frequency range in; If perform step B3 within the scope of ultralow frequency, if perform step B4 in high-frequency range
B3, CPU control to select control module to switch to the first connection status, are connected by first of antenna body the feedback point with radio-frequency (RF) receiving and transmission module;
B4, CPU control to select control module to switch to the 3rd connection status, are connected by passive antenna with radio-frequency (RF) receiving and transmission module.
Compared to prior art, antenna band adjusting device provided by the invention and method thereof, comprise antenna body, passive antenna, the CPU be arranged on pcb board, radio-frequency (RF) receiving and transmission module and selection control module; Described CPU controls according to current working frequency range the connection status selecting control module, selects passive antenna or antenna body to be connected with radio-frequency (RF) receiving and transmission module by selecting control module, with host age preference antenna or antenna body receiving and transmitting signal; Thus automatically change the length of antenna, like this can when antenna space and antenna size constant, spreading antenna bandwidth effectively, and the working frequency range changing antenna, improve the radiance of antenna.
Accompanying drawing explanation
Fig. 1 is existing antenna structure view.
Fig. 2 is the block diagram of antenna band adjusting device provided by the invention.
Fig. 3 is the structural representation of antenna band adjusting device Application Example provided by the invention.
Fig. 4 is the antenna return loss schematic diagram of antenna band adjusting device provided by the invention.
Fig. 5 is antenna band method of adjustment flow chart provided by the invention.
Fig. 6 is the method flow diagram of antenna band method of adjustment Application Example provided by the invention.
Embodiment
The invention provides a kind of antenna band adjusting device and method thereof.By increasing the feedback point of antenna, need to switch feedback point according to working frequency range and increase the beamwidth of antenna, also again utilize existing passive antenna, passive antenna is allowed to become main antenna, make Antenna Operation in wider band limits by debugging, the antenna with the better performance of more wide bandwidth can be designed in existing space like this.For making object of the present invention, technical scheme and effect clearly, clearly, developing simultaneously referring to accompanying drawing, the present invention is described in more detail for embodiment.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Please refer to Fig. 2 and Fig. 3, antenna band adjusting device provided by the invention comprises antenna body 100, passive antenna 200, is arranged on CPU400 on pcb board and radio-frequency (RF) receiving and transmission module 500.Described pcb board is also provided with and selects control module 300.Described CPU controls according to current working frequency range the connection status selecting control module 300, selects passive antenna or antenna body to be connected with radio-frequency (RF) receiving and transmission module by selecting control module, with host age preference antenna or antenna body receiving and transmitting signal.
In the present embodiment, described antenna body comprises the first feedback point 101 and the second feedback point 102; First feedback point 101 of described antenna body 100 connects the first selecting side a selecting control module 300, second feedback point 102 of antenna body 100 connects the second selecting side b selecting control module 300, passive antenna 200 connects the 3rd selecting side c selecting control module 300, radio-frequency (RF) receiving and transmission module 500 connects the first control end e and the second control end f of transmission ends d and CPU400, the CPU400 connection selection control module 300 selecting control module 300.Described CPU400 controls according to current working frequency range the connection status selecting control module 300, the first feedback point 101 of passive antenna 200, antenna body 100 or the second feedback point 102 to be connected with radio-frequency (RF) receiving and transmission module 500 by selecting control module 300; Thus automatically change the length of antenna, like this can when antenna space and antenna size constant, spreading antenna bandwidth effectively, and the working frequency range changing antenna, improve the radiance of antenna.
In the present embodiment, described selection control module 300 comprises the first switch 301, second switch 302, first match circuit 303, second match circuit 304, the 3rd match circuit 305 and the 4th match circuit 306.Wherein, the model of described first switch 301 is RF1628, and the model of second switch 302 is RF1117.Each match circuit for finely tuning antenna resonance, to optimize the performance of antenna; It is prior art, is not described further its particular circuit configurations and operation principle herein.
1st pin (namely selecting the transmission ends d of control module 300) of described first switch 301 connects radiofrequency emitting module, 2nd pin of the first switch 301 connects one end of the second match circuit 304, the other end (namely selecting the second selecting side b of control module 300) of the second match circuit 304 connects the second feedback point 102 of antenna body 100,3rd pin of the first switch 301 connects one end of the first match circuit 303, (namely select the first selecting side of control module 300 a) to connect antenna body 100 first presents point 101 to the other end of the first match circuit 303,4th pin of the first switch 301 connects one end of the 3rd match circuit 305, the control pin (namely selecting the first control end e of control module 300) of the first switch 301 connects CPU400,1st pin (namely selecting the 3rd selecting side c of control module 300) of second switch 302 connects passive antenna 200,2nd pin of second switch 302 connects the other end of the 3rd match circuit 305,3rd pin of second switch 302 connects one end of the 4th match circuit 306, the other end ground connection of the 4th match circuit 306, the control pin (namely selecting the second control end f of control module 300) of second switch 302 connects CPU400.Wherein, between radio-frequency (RF) receiving and transmission module and the first switch, radio-frequency (RF) impedance line between match circuit with antenna, is adopted to be connected.
The present embodiment make use of passive antenna 200 to greatest extent.Passive antenna 200 is generally arranged near antenna body 100, i.e. an antenna near antenna body 100 of the ground extraction of pcb board.Carry out control switch by CPU400 according to current working frequency range to switch accordingly, antenna body or passive antenna can be connected with radio-frequency (RF) receiving and transmission module 500, produce resonance by coupling, thus the frequency range of antenna is adjusted to the working frequency range of needs, to expand the beamwidth of antenna.Described connection status comprises:
First connection status 1-3:1-3.Previous 1-3 represents the connected mode of the first switch 301, and namely the 1st pin of the first switch 301 is connected with the 3rd pin.A rear 1-3 represents the connected mode of second switch 302, and namely the 1st pin of second switch 302 is connected with the 3rd pin.First of antenna body 100 feedback point 101 can be connected with radio-frequency (RF) receiving and transmission module 500 by the first match circuit 303, by passive antenna 200 by the 4th match circuit 306 ground connection like this.Return loss under this connection status is as shown in the dotted line on Fig. 4 left side.In Fig. 4, X-axis is frequency, and Y-axis is return loss, and then the performance of antenna is better for the value of return loss less (namely close-40, have downward crest to occur)., antenna now can cover lower frequency range, ultralow frequency as can be seen from Fig. 4 enough, as band13 and band17(also can cover other ultralow frequency ranges as band12 by the adjustment of match circuit).
Second connection status 1-2:1-3.1-2 represents the connected mode of the first switch 301, and namely the 1st pin of the first switch 301 is connected with the 2nd pin.1-3 represents the connected mode of second switch 302, and namely the 1st pin of second switch 302 is connected with the 3rd pin.Second of antenna body 100 feedback point 102 can be connected with radio-frequency (RF) receiving and transmission module 500 by the second match circuit 304, by passive antenna 200 by the 4th match circuit 306 ground connection like this.Return loss under this connection status as shown by the bold lines in fig.As can be seen from Fig. 4 enough, antenna now can cover low frequency (as GSM850/GSM900) and intermediate frequency (as DCS1800/PCS1900/WCDMA2100).
3rd connection status 1-4:1-2.1st pin of the first switch 301 is connected with the 4th pin, and the 1st pin of second switch 302 is connected with the 2nd pin.Passive antenna 200 can be connected with radio-frequency (RF) receiving and transmission module 500 by the 3rd match circuit 305 like this, now antenna body 100 does not access.Return loss under this connection status is as shown in the dotted line on the right in Fig. 4., antenna now can cover high frequency as can be seen from Fig. 4 enough, as band38 and band40(herein band40 for citing, such as a little adjust antenna can cover higher frequency range band41 or band47).So namely, be that passive antenna 200 is become main antenna, original antenna body 100 is inoperative on the contrary.By the adjustment of the 3rd match circuit 305, the frequency range of passive antenna 200 is adjusted to required frequency range, expand the bandwidth of operation of antenna.
It is to be appreciated that described connection status also can have other compound modes, above-mentioned three kinds of requirements that can meet each frequency range, are not described further herein.Described antenna band adjusting device is applicable to the communication apparatus of all use antennas (adopting the antenna of LTE technology), as mobile phone, panel computer etc.
Based on above-mentioned antenna band adjusting device, the present invention also provides a kind of antenna band method of adjustment, and as shown in Figure 5, described antenna band method of adjustment comprises:
CPU search network when S100, start is also registered, and selects control module to be defaulted as the second connection status 1-2:1-3, is connected by second of antenna body the feedback point with radio-frequency (RF) receiving and transmission module.
In this step, carry out full range scanning after CPU start, go out the network concurrent that can connect according to the information search of SIM card and play connection.Based on now selecting control module to be the second connection status 1-2:1-3, namely the second feedback o'clock of antenna body is connected with radio-frequency (RF) receiving and transmission module by the second match circuit, and passive antenna is by the 4th match circuit ground connection.Now antenna can cover low frequency (as GSM850/GSM900) and intermediate frequency (as DCS1800/PCS1900/WCDMA2100), and this is conventional frequency range.
S200, CPU control according to current working frequency range the connection status selecting control module, select passive antenna or antenna body to be connected with radio-frequency (RF) receiving and transmission module by selecting control module.
See also Fig. 6, described step S200 specifically comprises:
S201, CPU read the working frequency range of radio-frequency (RF) receiving and transmission module, judge this working frequency range whether in low frequency or intermediate-frequency band.Be keep the second current connection status 1-2:1-3, continue to perform step S201, continue to judge working frequency range whether in low frequency or intermediate-frequency band; Otherwise perform step S202.
S202, search for current available network and judge this working frequency range within the scope of ultralow frequency or high-frequency range in: if perform step S203 within the scope of ultralow frequency, if perform step 204 in high-frequency range.
S203, CPU control to select control module to switch to the first connection status 1-3:1-3, are connected by first of antenna body the feedback point with radio-frequency (RF) receiving and transmission module.Such switching aft antenna can cover ultralow frequency frequency range.Also continue the current available network of search afterwards, judge that working frequency range is in high-frequency range or in low frequency or intermediate-frequency band.If in high-frequency range, the high frequency performing step S500 switches.If in low frequency or intermediate-frequency band, then select control module to switch to the second connection status 1-2:1-3, perform step S202 afterwards and continue to judge.
S204, CPU control to select control module to switch to the 3rd connection status 1-4:1-2, are connected by passive antenna with radio-frequency (RF) receiving and transmission module.Such switching aft antenna can cover high-frequency band.Also continue the current available network of search afterwards, judge that working frequency range is within the scope of ultralow frequency or in low frequency or intermediate-frequency band.If within the scope of ultralow frequency, the ultralow frequency performing step S203 switches.If in low frequency or intermediate-frequency band, then select control module to switch to the second connection status 1-2:1-3, perform step S202 afterwards and continue to judge.
By above-mentioned steps, constantly can judge being suitable for frequency range and carrying out corresponding switching adjustment of working frequency range, thus ensure that antenna can adjust covering automatically under different frequency range, ensure that communication quality.
In sum, antenna band adjusting device provided by the invention and method thereof, by increasing a feedback point at antenna body, the switching in conjunction with two switches is selected different antennas access radio-frequency (RF) receiving and transmission module, change the working frequency range of antenna, thus make antenna cover different frequency ranges; Meanwhile, passive antenna also can use as main antenna, expands the working frequency range of antenna greatly.Antenna Operation can be made at ultralow frequency, low frequency, intermediate frequency, high frequency without the need to changing existing space like this, the performance of antenna can also be promoted.
Be understandable that, for those of ordinary skills, can be equal to according to technical scheme of the present invention and inventive concept thereof and replace or change, and all these change or replace the protection range that all should belong to the claim appended by the present invention.
Claims (7)
1. an antenna band adjusting device, comprises antenna body, passive antenna, is arranged on CPU on pcb board and radio-frequency (RF) receiving and transmission module, it is characterized in that, described pcb board is also provided with selection control module;
Described CPU controls according to current working frequency range the connection status selecting control module, selects passive antenna or antenna body to be connected with radio-frequency (RF) receiving and transmission module by selecting control module, with host age preference antenna or antenna body receiving and transmitting signal.
2. antenna band adjusting device according to claim 1, is characterized in that, described antenna body comprises the first feedback point and the second feedback point; First feedback point of described antenna body connects the first selecting side selecting control module, second feedback point of antenna body connects the second selecting side selecting control module, passive antenna connects the 3rd selecting side selecting control module, radio-frequency (RF) receiving and transmission module connects the first control end and second control end of transmission ends and CPU, the CPU connection selection control module selecting control module.
3. antenna band adjusting device according to claim 2, is characterized in that, described selection control module comprises the first switch, second switch, the first match circuit, the second match circuit, the 3rd match circuit and the 4th match circuit;
1st pin of described first switch connects radiofrequency emitting module, 2nd pin of the first switch connects one end of the second match circuit, the other end of the second match circuit connects the second feedback point of antenna body, 3rd pin of the first switch connects one end of the first match circuit, the other end of the first match circuit connects the first feedback point of antenna body, 4th pin of the first switch connects one end of the 3rd match circuit, the control pin of the first switch connects CPU, 1st pin of second switch connects passive antenna, 2nd pin of second switch connects the other end of the 3rd match circuit, 3rd pin of second switch connects one end of the 4th match circuit, the other end ground connection of the 4th match circuit, the control pin of second switch connects CPU.
4. antenna band adjusting device according to claim 3, is characterized in that, described connection status comprises:
First connection status: the 1st pin of the first switch is connected with the 3rd pin, the 1st pin of second switch is connected with the 3rd pin;
Second connection status: the 1st pin of the first switch is connected with the 2nd pin, the 1st pin of second switch is connected with the 3rd pin;
3rd connection status: the 1st pin of the first switch is connected with the 4th pin, the 1st pin of second switch is connected with the 2nd pin.
5. antenna band adjusting device according to claim 4, is characterized in that, antenna cover ultralow frequency under described first connection status, antenna cover low frequency and intermediate frequency under the second connection status, antenna cover high frequency under the 3rd connection status.
6. an antenna band method of adjustment, is characterized in that, comprising:
CPU search network when A, start is also registered, and selects control module to be defaulted as the second connection status, is connected by second of antenna body the feedback point with radio-frequency (RF) receiving and transmission module;
B, CPU control according to current working frequency range the connection status selecting control module, select passive antenna or antenna body to be connected with radio-frequency (RF) receiving and transmission module by selecting control module.
7. antenna band method of adjustment according to claim 6, is characterized in that, described step B specifically comprises:
B1, CPU read the working frequency range of radio-frequency (RF) receiving and transmission module, judge this working frequency range whether in low frequency or intermediate-frequency band: be keep the second current connection status, continue to perform step B1; Otherwise perform step B2;
B2, search for current available network and judge this working frequency range within the scope of ultralow frequency or high-frequency range in; If perform step B3 within the scope of ultralow frequency, if perform step B4 in high-frequency range
B3, CPU control to select control module to switch to the first connection status, are connected by first of antenna body the feedback point with radio-frequency (RF) receiving and transmission module;
B4, CPU control to select control module to switch to the 3rd connection status, are connected by passive antenna with radio-frequency (RF) receiving and transmission module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610000918.5A CN105490025B (en) | 2016-01-04 | 2016-01-04 | Antenna frequency band adjusting device and method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610000918.5A CN105490025B (en) | 2016-01-04 | 2016-01-04 | Antenna frequency band adjusting device and method thereof |
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| CN105490025A true CN105490025A (en) | 2016-04-13 |
| CN105490025B CN105490025B (en) | 2020-05-08 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106229677A (en) * | 2016-08-26 | 2016-12-14 | 青岛海信移动通信技术股份有限公司 | The NFC antenna of a kind of mobile terminal and mobile terminal |
| CN107240774A (en) * | 2017-04-28 | 2017-10-10 | 歌尔股份有限公司 | A kind of wearable device and its control method |
| CN108281770A (en) * | 2018-03-05 | 2018-07-13 | 上海煜鹏通讯电子股份有限公司 | A kind of ultra-wideband antenna and its resonance method |
| CN109120282A (en) * | 2018-08-23 | 2019-01-01 | 珠海格力电器股份有限公司 | A kind of mobile terminal antenna multiplex system, control method and its mobile terminal |
| CN109546293A (en) * | 2018-11-14 | 2019-03-29 | 惠州Tcl移动通信有限公司 | Antenna structure, mobile terminal applied to comprehensive screen mobile terminal |
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| JP2005260762A (en) * | 2004-03-12 | 2005-09-22 | Nec Access Technica Ltd | Antenna switching system and method of communication device |
| CN103928752A (en) * | 2014-04-11 | 2014-07-16 | 广东欧珀移动通信有限公司 | Mobile phone and antenna thereof |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2005260762A (en) * | 2004-03-12 | 2005-09-22 | Nec Access Technica Ltd | Antenna switching system and method of communication device |
| CN103928752A (en) * | 2014-04-11 | 2014-07-16 | 广东欧珀移动通信有限公司 | Mobile phone and antenna thereof |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106229677A (en) * | 2016-08-26 | 2016-12-14 | 青岛海信移动通信技术股份有限公司 | The NFC antenna of a kind of mobile terminal and mobile terminal |
| CN106229677B (en) * | 2016-08-26 | 2019-11-29 | 青岛海信移动通信技术股份有限公司 | A kind of NFC antenna and mobile terminal of mobile terminal |
| CN107240774A (en) * | 2017-04-28 | 2017-10-10 | 歌尔股份有限公司 | A kind of wearable device and its control method |
| CN107240774B (en) * | 2017-04-28 | 2023-10-17 | 歌尔股份有限公司 | Wearable device and control method thereof |
| CN108281770A (en) * | 2018-03-05 | 2018-07-13 | 上海煜鹏通讯电子股份有限公司 | A kind of ultra-wideband antenna and its resonance method |
| CN109120282A (en) * | 2018-08-23 | 2019-01-01 | 珠海格力电器股份有限公司 | A kind of mobile terminal antenna multiplex system, control method and its mobile terminal |
| CN109546293A (en) * | 2018-11-14 | 2019-03-29 | 惠州Tcl移动通信有限公司 | Antenna structure, mobile terminal applied to comprehensive screen mobile terminal |
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|---|---|
| CN105490025B (en) | 2020-05-08 |
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