CN103515720B - Dual-mode antenna structure and calibration steps thereof - Google Patents
Dual-mode antenna structure and calibration steps thereof Download PDFInfo
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- CN103515720B CN103515720B CN201210218507.5A CN201210218507A CN103515720B CN 103515720 B CN103515720 B CN 103515720B CN 201210218507 A CN201210218507 A CN 201210218507A CN 103515720 B CN103515720 B CN 103515720B
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Abstract
The present invention proposes a kind of dual-mode antenna structure and calibration steps thereof.Wherein, dual-mode antenna structure comprises: the first antenna and the second antenna; Connector, one end is connected with the first antenna; First impedance component and the second impedance component, first impedor one end is connected with connector, and second impedor one end is connected with the second antenna; First filter capacitor, one end is connected with the second impedor other end; 3rd impedance component, two ends are connected with the other end of the first impedance component with the first filter capacitor respectively; Filter, one end is connected with the 3rd impedor other end; And first antenna bond pad and the second antenna bond pad, the first antenna bond pad is connected with the other end of the first filter, the second antenna bond pad ground connection.The present invention, by connector is set to the first antennas paths, realizes the separate calibration of two-way antenna when not increasing connector, cost-saving and space, and calibration process does not need the hardware carrying out path to disconnect yet, and is simple and easy to implement.
Description
Technical field
The present invention relates to radio-frequency antenna technical field, particularly relate to a kind of dual-mode antenna structure and calibration steps thereof.
Background technology
Currently get more and more due to dual-mode handset, and some projects CDMA is divided into main road and bypass, so antenna just must make two, adds GSM antenna, and antenna amount reaches three more than.Although the requirement of the frequency range of dual-mode handset can be realized like this, obviously do not meet the development trend that current phone space is more and more less.
For this reason, consider that the frequency range of CDMA850 and GSM900 is close, therefore design can make CDMA bypass antenna and GSM main road antenna unite two into one, make it share an antenna.Fig. 1 is the schematic diagram of the dual-mode antenna structure of an embodiment of prior art.As shown in Figure 1, use two radio-frequency masers to calibrate respectively GSM and CDMA bypass, then carry out in rear end the process that unites two into one, make GSM path and CDMA bypass lead to same antenna bond pad point.But, in this design, need use two radio frequency (RF) coaxial connectors, concerning totally unfavorable cost and mobile phone space layout.
Thus, in the dual-mode antenna structure of another embodiment of prior art as shown in Figure 2, GSM and CDMA is connected to antenna end by the radio frequency (RF) coaxial connector shared.The benefit of this structure is the space of having saved a radio frequency (RF) coaxial connector.But this structure makes the performance of CDMA bypass and GSM influence each other: when GSM works, because a part of signal can be leaked on CDMA bypass, cause GSM in the power drop of GSM900 and GSM1800 frequency range; When CDMA works, CDMA bypass can be subject to the impact of GSM signal, causes sensitivity to decline, and the performance impact especially brought when calibration is more remarkable.
For the problems referred to above, because CDMA800 frequency range and GSM900 frequency range have component frequency to intersect (880.2Hz-893.97Hz), the devices such as filter therefore cannot be used to carry out filtering with the impact of filtering interference signals.And if only adjust coupling, through test prove, the sensitivity of CDMA bypass and the performance of GSM cannot be improved simultaneously.
In addition consider if divide to open to CDMA bypass and GSM and calibrate, finally be combined into a road again, the performance of GSM and CDMA bypass can be made to be increased to ideal value simultaneously, but will calibrate so at every turn and all carry out soldering, when namely calibrating GSM need CDMA bypass hardware to disconnect, need GSM path hardware to disconnect during calibration CDMA bypass, finally two-way is combined into a road and arrives antenna.Such calibration steps obviously can not be implemented at production line.Therefore a kind of needs is needed to be disconnected by GSM and CDMA bypass hardware and still can realize the calibration steps of calibration separately.
Summary of the invention
The present invention is intended at least to solve one of technical problem existed in prior art.
For this reason, one aspect of the present invention proposes a kind of dual-mode antenna structure, comprising: the first antenna and the second antenna; Connector, one end of described connector is connected with described first antenna; First impedance component and the second impedance component, described first impedor one end is connected with described connector, and described second impedor one end is connected with described second antenna; First filter capacitor, one end of described first filter capacitor is connected with the described second impedor other end; 3rd impedance component, described 3rd impedor two ends are connected with the other end of described first impedance component with described first filter capacitor respectively; Filter, one end of described filter is connected with the described 3rd impedor other end; And first antenna bond pad and the second antenna bond pad, described first antenna bond pad is connected with the other end of described first filter, described second antenna bond pad ground connection.
According to the dual-mode antenna structure of the embodiment of the present invention, by connector being set in the first antennas paths, make it possible to the calibration being carried out the second antenna by antenna bond pad, and carry out the calibration to the first antenna by connector, thus the separate calibration of two-way antenna is realized when not increasing connector, cost-saving and space, and do not need the hardware carrying out path to disconnect at calibration process yet, be simple and easy to implement.In addition, by increasing by the first filter capacitor in the second antennas paths, the interactional problem of performance between two-way antennas paths is solved.
For this reason, the present invention also proposes a kind of calibration steps of dual-mode antenna structure on the other hand, comprises the following steps: described first antenna and described first impedance component are disconnected by described connector; Respectively the first probe of tester is connected with the second antenna bond pad with described first antenna bond pad with the second probe, to test described second antenna; And after complete to described second antenna measurement, remove described first probe and the second probe, and the alignment heads of described tester is connected with described connector, to test described first antenna.
According to the calibration steps of the dual-mode antenna structure of the embodiment of the present invention, antenna bond pad is utilized to carry out the calibration of the second antenna by probe, the calibration of the first antenna is carried out by connector, do not need in calibration process to introduce extra connector, make full use of antenna bond pad, save cost, being simple and easy to implement, realizing the separate calibration of two-way antenna when not disconnected by the hardware of two-way antenna.And through actual items checking, the path performance of being calibrated by antenna bond pad is basically identical with the path performance of calibrating from connector, and the performance realizing two-way antennas paths is increased to ideal value simultaneously.
Additional aspect of the present invention 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 invention.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:
Fig. 1 is the schematic diagram of the dual-mode antenna structure of an embodiment of prior art;
Fig. 2 is the schematic diagram of the dual-mode antenna structure of another embodiment of prior art;
Fig. 3 is the schematic diagram of the dual-mode antenna structure of one embodiment of the invention;
Fig. 4 is the schematic diagram of the dual-mode antenna structure of another embodiment of the present invention; And
Fig. 5 is the flow chart of the calibration steps of the dual-mode antenna structure of one embodiment of the invention.
Embodiment
Be described below in detail embodiments of the invention, 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 present invention, and can not limitation of the present invention being interpreted as.
In describing the invention, unless otherwise prescribed and limit, it should be noted that, 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.
Fig. 3 is the schematic diagram of the dual-mode antenna structure of one embodiment of the invention.As shown in Figure 3, comprise according to the dual-mode antenna structure of the embodiment of the present invention: the first antenna 10, second antenna 20, connector 30, first impedance component R1, the second impedance component R2, the first filter capacitor C1, the 3rd impedance component R3, filter 40, first antenna bond pad 50 and the second antenna bond pad 60.
One end of connector 30 with the first antenna 10(as GSM antenna) be connected, one end of first impedance component R1 is connected with connector 30, one end of second impedance component R2 with the second antenna 20(as CDMA bypass antenna) be connected, one end of the first filter capacitor C1 is connected with the other end of the second impedance component R2.The two ends of the 3rd impedance component R3 are connected with the other end of the first filter capacitor C1 with the first impedance component R1 respectively.One end of filter 40 is connected with the other end of the 3rd impedance component R3, and the other end is connected with the first antenna bond pad 50.Second antenna bond pad 60 ground connection.
Particularly, filter 40 comprises the 4th impedance component R4, the first inductance L 1 and the second inductance L 2.One end of 4th impedance component R4 is connected with the other end of the 3rd impedance component R3, and the other end is connected with the first antenna bond pad 50.One end of first inductance L 1 is connected with one end of the 4th impedance component R4, other end ground connection.One end of second inductance L 2 is connected with the other end of the 4th impedance component R4, other end ground connection.Thus, by arranging the parameter of the 4th impedance component R4, the first inductance L 1 and the second inductance L 2, mating of filter 40 and the first antenna 10 and the second antenna 20 can be realized, make the performance of antenna to best.
More specifically, connector 30 comprises first end a, the second end b and the 3rd end c, first end a are connected with the first antenna 10, and the second end b is connected with the first impedance component R1, the 3rd end c ground connection.When antenna normally works, first end a is connected with the second end b.When carrying out antenna calibration, first end a is connected with the alignment heads of tester, and the second end b and first end a disconnects.Thus, first impedance component R1 and the first antenna 10 disconnect, thus the calibration to the second antenna 20 can be realized by the first antenna bond pad 50 and the second antenna bond pad 60, and realize the calibration to the first antenna 10 by tester, realize the separate calibration of the first antenna 10 and the second antenna 20 thus.
According to the dual-mode antenna structure of the embodiment of the present invention, by connector being set in the first antennas paths, make it possible to the calibration being carried out the second antenna by antenna bond pad, and by the calibration of connector to the first antenna, thus the separate calibration of two-way antenna is realized when not increasing connector, cost-saving and space, and do not need the hardware carrying out path to disconnect at calibration process yet, be simple and easy to implement.In addition, by increasing by the first filter capacitor in the second antennas paths, the interactional problem of performance between two-way antennas paths is solved.
Fig. 4 is the schematic diagram of the dual-mode antenna structure of another embodiment of the present invention.As shown in Figure 4, on the basis of the embodiment shown in Fig. 3, also comprise the second filter capacitor C2 and the 3rd filter capacitor C3 according to the dual-mode antenna structure of the embodiment of the present invention.
One end of second filter capacitor C2 is connected with one end of the second resistance R2, the other end ground connection of the second filter capacitor C2.One end of 3rd filter capacitor C3 is connected with the other end of the second resistance R2, the other end ground connection of the 3rd filter capacitor C3.
According to the dual-mode antenna structure of the embodiment of the present invention, by increasing the second filter capacitor and the 3rd filter capacitor, forming the antenna-matching circuit of the second antennas paths with the second resistance R2, the performance of the second antennas paths can be optimized.
Based on the dual-mode antenna structure of the embodiment of the present invention, the present invention also proposes a kind of calibration steps of dual-mode antenna structure.
Fig. 5 is the flow chart of the calibration steps of the dual-mode antenna structure of one embodiment of the invention.As shown in Figure 5, comprise the steps according to the calibration steps of the dual-mode antenna structure of the embodiment of the present invention.
Step S101, is disconnected the first antenna and the first impedance component by connector.
Particularly, connector comprises first end to the 3rd end, first end is connected with the first antenna, second end is connected with the first impedance component, 3rd end ground connection, inserts alignment heads in the connectors, and alignment heads is connected with the first end of connector, disconnect the connection of first end and the second end, thus disconnect the first antenna and the first impedance component.
Step S102, is connected the first probe of tester with the second antenna bond pad with the first antenna bond pad with the second probe respectively, to test the second antenna.
Now, the first antennas paths and antenna end disconnect, and the calibration at antenna bond pad place just just for the second antenna, can realize the detection calibration to the second antenna thus.
Step S103, after complete to the second antenna measurement, remove the first probe and the second probe, and the alignment heads of tester is connected with connector, to test the first antenna.
Particularly, the alignment heads of tester is connected with connector first end, directly can realize the calibration to the first antenna by tester thus.
According to the calibration steps of the dual-mode antenna structure of the embodiment of the present invention, antenna bond pad is utilized to carry out the calibration of the second antenna by probe, the calibration of the first antenna is carried out by connector, do not need in calibration process to introduce extra connector, make full use of antenna bond pad, save cost, being simple and easy to implement, realizing the separate calibration of two-way antenna when not disconnected by the hardware of two-way antenna.And through actual items checking, the path performance of being calibrated by antenna bond pad is basically identical with the path performance of calibrating from connector, and the performance realizing two-way antennas paths is increased to ideal value simultaneously.
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 invention 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 describe embodiments of the invention, those having ordinary skill in the art will appreciate that: can carry out multiple change, amendment, replacement and modification to these embodiments when not departing from principle of the present invention and aim, scope of the present invention is by claim and equivalents thereof.
Claims (7)
1. a dual-mode antenna structure, is characterized in that, comprising:
First antenna and the second antenna;
Connector, one end of described connector is connected with described first antenna;
First impedance component and the second impedance component, described first impedor one end is connected with described connector, and described second impedor one end is connected with described second antenna;
First filter capacitor, one end of described first filter capacitor is connected with the described second impedor other end;
3rd impedance component, described 3rd impedor one end is connected with the other end of described first filter capacitor with the described first impedor other end respectively;
Filter, one end of described filter is connected with the described 3rd impedor other end; And
First antenna bond pad and the second antenna bond pad, described first antenna bond pad is connected with the other end of described filter, described second antenna bond pad ground connection.
2. dual-mode antenna structure as claimed in claim 1, is characterized in that, also comprise:
Second filter capacitor, one end of described second filter capacitor is connected with described second impedor one end, the other end ground connection of described second filter capacitor; And
3rd filter capacitor, one end of described 3rd filter capacitor is connected with the described second impedor other end, the other end ground connection of described 3rd filter capacitor.
3. dual-mode antenna structure as claimed in claim 1, it is characterized in that, described filter comprises:
4th impedance component, described 4th impedor one end is connected with the described 3rd impedor other end, and the described 4th impedor other end is connected with described first antenna bond pad;
First inductance, one end of described first inductance is connected with described 4th impedor one end, the other end ground connection of described first inductance; And
Second inductance, one end of described second inductance is connected with the described 4th impedor other end, the other end ground connection of described second inductance.
4. dual-mode antenna structure as claimed in claim 1, it is characterized in that, described first antenna is GSM antenna, and described second antenna is CDMA bypass antenna.
5. dual-mode antenna structure as claimed in claim 1, it is characterized in that, described connector comprises first end to the 3rd end, described first end is connected with described first antenna, described second end is connected with described first impedance component, described 3rd end ground connection, when described first end is connected with alignment heads, described first end and described second end disconnect.
6. a calibration steps for the dual-mode antenna structure as described in any one of claim 1-5, is characterized in that, comprises the following steps:
By described connector, described first antenna and described first impedance component are disconnected;
Respectively the first probe of tester is connected with the second antenna bond pad with described first antenna bond pad with the second probe, to test described second antenna; And
After complete to described second antenna measurement, remove described first probe and the second probe, and the alignment heads of described tester is connected with described connector, to test described first antenna.
7. the calibration steps of dual-mode antenna structure as claimed in claim 6, is characterized in that, disconnecting by inserting alignment heads in described connector to make described first antenna and described first impedance component.
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| CN201210218507.5A CN103515720B (en) | 2012-06-28 | 2012-06-28 | Dual-mode antenna structure and calibration steps thereof |
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| CN201210218507.5A CN103515720B (en) | 2012-06-28 | 2012-06-28 | Dual-mode antenna structure and calibration steps thereof |
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| CN103515720A CN103515720A (en) | 2014-01-15 |
| CN103515720B true CN103515720B (en) | 2016-03-09 |
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| CN107086356B (en) * | 2017-05-18 | 2023-08-29 | 北京小米移动软件有限公司 | Antenna Module and Terminal |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101702470A (en) * | 2009-11-20 | 2010-05-05 | 中兴通讯股份有限公司 | Bi-module terminal antenna and signal processing method |
| CN102185950A (en) * | 2011-06-03 | 2011-09-14 | 惠州Tcl移动通信有限公司 | Radio-frequency testing device and radio-frequency testing method for multi-antenna handset |
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| SE522563C2 (en) * | 2000-02-01 | 2004-02-17 | Ericsson Telefon Ab L M | Calibration method for an adaptive group antenna |
| US6847330B2 (en) * | 2003-06-23 | 2005-01-25 | Netgear Inc. | Detachable 802.11a antenna detection |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101702470A (en) * | 2009-11-20 | 2010-05-05 | 中兴通讯股份有限公司 | Bi-module terminal antenna and signal processing method |
| CN102185950A (en) * | 2011-06-03 | 2011-09-14 | 惠州Tcl移动通信有限公司 | Radio-frequency testing device and radio-frequency testing method for multi-antenna handset |
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