CN104681984A - Wireless communication device - Google Patents
Wireless communication device Download PDFInfo
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- CN104681984A CN104681984A CN201310619048.6A CN201310619048A CN104681984A CN 104681984 A CN104681984 A CN 104681984A CN 201310619048 A CN201310619048 A CN 201310619048A CN 104681984 A CN104681984 A CN 104681984A
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- antenna
- communication device
- radio communication
- variable capacitance
- capacitance diode
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Abstract
A wireless communication device comprises a CPU (central processing unit), a matching circuit, a variode, a first antenna and a second antenna; the first antenna and the second antenna are close to each other in work frequency band; the variode and the matching circuit jointly provide impedance matching for the second antenna; the CPU outputs a corresponding control signal according to the work state of the second antenna; the control signal controls a capacitance value of the variode to correspondingly change the impedance matching degree of the second antenna. The wireless communication device can effectively reduce the interference between the first antenna and the second antenna.
Description
Technical field
The present invention relates to a kind of radio communication device, especially and a kind of radio communication device with double antenna.
Background technology
Along with the development of radio communication device, in order to improve speech quality and accelerate Wireless Data Transmission, the Antenna Operation frequency range of present radio communication device reaches the frequency ranges such as UMTS, TD-SCDMA.In order to meet the multiple needs of consumer, radio communication device generally has bluetooth (Bluetooth, BT) antenna and Wireless Fidelity (Wireless Fidelity, WIFI) antenna, and the working frequency range of BT/WIFI antenna is 2.4-2.483GHz.But easily produce interference between the main antenna being now operating in the frequency ranges such as UMTS, TD-SCDMA BT/WIFI antenna close with frequency range, affect the transmitting-receiving performance of antenna.
At present, the common practice of industry be by BT/WIFI antenna and main antenna as far as possible away from, to reduce interference, be arranged on the top of radio communication device by BT/WIFI antenna, main antenna be arranged on the bottom of radio communication device.Because the element such as optical inductor, camera, receiver being arranged on the upper space of radio communication device occupies upper clearance district, the antenna efficiency of BT/WIFI antenna is affected.
Summary of the invention
In view of above content, be necessary to provide a kind of radio communication device that can improve antenna transmitting-receiving performance.
A kind of radio communication device, it comprises CPU, match circuit, variable capacitance diode, the first antenna and the second antenna, and this first antenna is close with the second Antenna Operation frequency range, and this variable capacitance diode and match circuit are jointly for the second antenna provides impedance matching; This CPU exports corresponding control signal according to the operating state of the second antenna, and this control signal controls the capacitance of variable capacitance diode, with the level of impedance match of this second antenna of corresponding change.
Above-mentioned radio communication device, when the second antenna is in running order, outputs control signals to variable capacitance diode by CPU, and this variable capacitance diode is optimized match circuit, jointly for the second antenna provides impedance matching; When the second antenna is in idle condition, this CPU outputs control signals to variable capacitance diode, make the impedance matching of the second antenna be mismatch Conditions, the working frequency range of this second antenna departs from the working frequency range of the first antenna, thus reduces the interference of the second antenna to the first antenna.
Accompanying drawing explanation
Fig. 1 is the functional block diagram of the radio communication device of present pre-ferred embodiments.
Main element symbol description
| Radio communication device | 100 |
| CPU | 10 |
| Anneta module | 20 |
| Match circuit | 30 |
| First antenna | 40 |
| Second antenna | 50 |
| Variable capacitance diode | VD |
Following embodiment will further illustrate the present invention in conjunction with above-mentioned accompanying drawing.
Embodiment
Refer to Fig. 1, preferred embodiment of the present invention provides a kind of radio communication device 100, and it can be mobile phone, personal digital assistant (PDA), panel computer etc.This radio communication device 100 comprises central processing unit (Central Processing Unit, CPU) 10, Anneta module 20, match circuit 30, first antenna 40, second antenna 50 and variable capacitance diode VD.
This CPU10 is used for exporting according to the operating state of Anneta module 20 controlling signal to variable capacitance diode VD accordingly.Particularly, this CPU is electrically connected to Anneta module 20, for detecting the operating state of Anneta module 20.This CPU10 is provided with a control pin GPIO, and when this Anneta module 20 is in idle condition, this control pin GPIO exports a low level control signal; When this Anneta module 20 is in running order, this control pin GPIO exports a high-level control signal.
This Anneta module 20 is electrically connected with match circuit 30, for carrying out Signal transmissions by match circuit 30 and the second antenna 50, makes this second antenna 50 receive and dispatch the wireless signal of special frequency channel.
This match circuit 30 and the second antenna 50 are electrically connected, for variable capacitance diode VD jointly for the second antenna 50 provides impedance matching.This variable capacitance diode VD plus earth, negative electrode is electrically connected to the node between CPU10 and match circuit 30, inputing to variable capacitance diode VD voltage, variable capacitance diode VD can be made to have corresponding capacitance by changing.So, the optimization to match circuit 30 can be realized, thus optimize the matched impedance of the second antenna 50.In the present embodiment, the second antenna 50 impedance becomes perception, facilitates that variable capacitance diode VD's is tuning.
The working frequency range of this first antenna 40 and the second antenna 50 is close or some work frequency range overlapping, thus this first antenna 40 and the second antenna 50 exist the possibility interfered with each other.In present embodiment, this first antenna 40 is the main antenna of radio communication device 100, can be operated in the frequency ranges such as UMTS, TD-SCDMA.This second antenna 50 is BT, WIFI or the gps antenna of radio communication device 100.
The using method of this radio communication device 100 is described below in two kinds of situation.
When the second antenna 50 of radio communication device 100 is in idle condition, this CPU10 output low level controls signal to variable capacitance diode VD, this low level control signal is not enough to reach the voltage needed for variable capacitance diode VD, thus this variable capacitance diode VD is not optimized match circuit 30, the impedance matching of this second antenna 50 is in mismatch Conditions, namely the working frequency range of the second antenna 50 can offset, thus make the working frequency range of the second antenna 50 away from the working frequency range of the first antenna 40, thus the transmitting-receiving performance reducing the first antenna 40 is subject to the possibility of the impact of the second antenna 50.
When the second antenna 50 of radio communication device 100 is in running order, this CPU10 exports high-level control signal to variable capacitance diode VD, this high-level control signal reaches the voltage needed for variable capacitance diode VD, this variable capacitance diode VD is made to have corresponding capacitance, thus this variable capacitance diode VD is optimized match circuit 30, this variable capacitance diode VD and match circuit 30 are jointly for the second antenna 50 provides impedance matching.
Radio communication device 100 of the present invention, when the second antenna 50 is in running order, high-level control signal is exported to variable capacitance diode VD by CPU10, this variable capacitance diode VD is made to have corresponding capacitance, thus this variable capacitance diode VD is optimized match circuit 30, jointly for the second antenna 50 provides impedance matching.Simultaneously, when the second antenna is in idle condition, this CPU10 output low level controls signal to variable capacitance diode VD, this low level control signal is not enough to reach the voltage needed for variable capacitance diode VD, thus this variable capacitance diode VD is not optimized match circuit 30, and then second the working frequency range of antenna 50 depart from the working frequency range of the first antenna 40, thus reduce the interference of the second antenna 50 to the first antenna 40.
Claims (6)
1. a radio communication device, comprise the first close antenna of working frequency range and the second antenna, it is characterized in that: this radio communication device also comprises CPU, match circuit and is electrically connected to the variable capacitance diode of match circuit, this variable capacitance diode and match circuit are jointly for the second antenna provides impedance matching; This CPU exports corresponding control signal according to the operating state of the second antenna, and this control signal controls the capacitance of variable capacitance diode, with the level of impedance match of this second antenna of corresponding change.
2. radio communication device as claimed in claim 1, it is characterized in that: described radio communication device also comprises Anneta module, this CPU and Anneta module are electrically connected, and this CPU detects the operating state of the second antenna by this Anneta module.
3. radio communication device as claimed in claim 2, is characterized in that: when described second antenna is in normal operating conditions, CPU outputs control signals to the capacitance of variable capacitance diode, makes the second antenna reach normal impedance matching.
4. radio communication device as claimed in claim 3, is characterized in that: when described second antenna is in idle condition, CPU outputs control signals to variable capacitance diode, makes the impedance matching of the second antenna be mismatch Conditions.
5. radio communication device as claimed in claim 1, is characterized in that: described variable capacitance diode plus earth, negative electrode is electrically connected to the node between CPU and match circuit.
6. radio communication device as claimed in claim 5, is characterized in that: described second antenna impedance becomes perception.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310619048.6A CN104681984B (en) | 2013-11-29 | 2013-11-29 | Wireless communication device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310619048.6A CN104681984B (en) | 2013-11-29 | 2013-11-29 | Wireless communication device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104681984A true CN104681984A (en) | 2015-06-03 |
| CN104681984B CN104681984B (en) | 2019-05-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310619048.6A Expired - Fee Related CN104681984B (en) | 2013-11-29 | 2013-11-29 | Wireless communication device |
Country Status (1)
| Country | Link |
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| CN (1) | CN104681984B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107026671A (en) * | 2016-02-01 | 2017-08-08 | 北京小米移动软件有限公司 | isolation control circuit, method and mobile terminal |
| CN108963424A (en) * | 2018-07-13 | 2018-12-07 | Oppo广东移动通信有限公司 | Antenna match control method and terminal device |
| CN109962329A (en) * | 2017-12-22 | 2019-07-02 | 华为技术有限公司 | A kind of antenna and communication device |
| CN111313986A (en) * | 2020-02-26 | 2020-06-19 | 捷开通讯(深圳)有限公司 | Test circuit structure and antenna test method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1551519A (en) * | 2003-04-25 | 2004-12-01 | Lg������ʽ���� | Antenna device for mobile communication terminal and its method |
| JP2007143171A (en) * | 2006-12-19 | 2007-06-07 | Toshiba Corp | Wireless communication apparatus and wireless communication method |
| CN201590488U (en) * | 2009-06-25 | 2010-09-22 | 青岛海信移动通信技术股份有限公司 | Antenna self-adaptive matching circuit and mobile communication terminal with same |
| WO2012069086A1 (en) * | 2010-11-25 | 2012-05-31 | Epcos Ag | Mobile communication device with improved antenna performance |
-
2013
- 2013-11-29 CN CN201310619048.6A patent/CN104681984B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1551519A (en) * | 2003-04-25 | 2004-12-01 | Lg������ʽ���� | Antenna device for mobile communication terminal and its method |
| JP2007143171A (en) * | 2006-12-19 | 2007-06-07 | Toshiba Corp | Wireless communication apparatus and wireless communication method |
| CN201590488U (en) * | 2009-06-25 | 2010-09-22 | 青岛海信移动通信技术股份有限公司 | Antenna self-adaptive matching circuit and mobile communication terminal with same |
| WO2012069086A1 (en) * | 2010-11-25 | 2012-05-31 | Epcos Ag | Mobile communication device with improved antenna performance |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107026671A (en) * | 2016-02-01 | 2017-08-08 | 北京小米移动软件有限公司 | isolation control circuit, method and mobile terminal |
| CN109962329A (en) * | 2017-12-22 | 2019-07-02 | 华为技术有限公司 | A kind of antenna and communication device |
| CN108963424A (en) * | 2018-07-13 | 2018-12-07 | Oppo广东移动通信有限公司 | Antenna match control method and terminal device |
| CN108963424B (en) * | 2018-07-13 | 2020-08-14 | Oppo广东移动通信有限公司 | Antenna matching control method and terminal equipment |
| CN111313986A (en) * | 2020-02-26 | 2020-06-19 | 捷开通讯(深圳)有限公司 | Test circuit structure and antenna test method |
| CN111313986B (en) * | 2020-02-26 | 2022-10-21 | 捷开通讯(深圳)有限公司 | Test circuit structure and antenna test method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104681984B (en) | 2019-05-21 |
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Granted publication date: 20190521 Termination date: 20211129 |