CN104681984B - Wireless communication device - Google Patents
Wireless communication device Download PDFInfo
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- CN104681984B CN104681984B CN201310619048.6A CN201310619048A CN104681984B CN 104681984 B CN104681984 B CN 104681984B CN 201310619048 A CN201310619048 A CN 201310619048A CN 104681984 B CN104681984 B CN 104681984B
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- antenna
- varactor
- communication device
- wireless communication
- cpu
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Abstract
A kind of wireless communication device comprising CPU, match circuit, varactor, first antenna and the second antenna, the first antenna and the second Antenna Operation frequency range are close, and the varactor and match circuit provide impedance matching jointly for the second antenna；The CPU exports corresponding control signal according to the working condition of the second antenna, which controls the capacitance of varactor, accordingly to change the level of impedance match of second antenna.The wireless communication device can effectively reduce the interference between the second antenna and first antenna.
Description
Technical field
The present invention relates to a kind of wireless communication devices, especially and a kind of wireless communication device with double antenna.
Background technique
With the development of wireless communication device, in order to improve speech quality and accelerate wireless data transmission, present channel radio
The Antenna Operation frequency range of T unit has reached the frequency ranges such as UMTS, TD-SCDMA.In order to meet a variety of needs of consumer, wirelessly
Communication device generally have bluetooth (Bluetooth, BT) antenna and Wireless Fidelity (Wireless Fidelity,
WIFI) antenna, the working frequency range of BT/WIFI antenna are 2.4-2.483GHz.However the frequency such as be now operating in UMTS, TD-SCDMA
It is easy to produce interference between BT/WIFI antenna similar in the primary antenna and frequency range of section, influences the transmitting-receiving performance of antenna.
Currently, the common practice of industry be BT/WIFI antenna and primary antenna is separate as far as possible, with reduce interference, i.e., by BT/
The top of wireless communication device is arranged in WIFI antenna, and primary antenna is arranged in the lower part of wireless communication device.Due to being mounted on
The elements such as optical inductor, camera, the earpiece of the upper space of wireless communication device occupy upper clearance area, so that BT/
The antenna efficiency of WIFI antenna is affected.
Summary of the invention
In view of the foregoing, it is necessary to which a kind of wireless communication device that can improve antenna transmitting-receiving performance is provided.
A kind of wireless communication device comprising CPU, match circuit, varactor, first antenna and the second antenna, it should
First antenna and the second Antenna Operation frequency range are close, and the varactor and match circuit provide impedance jointly for the second antenna
Match；The CPU exports corresponding control signal according to the working condition of the second antenna, which controls the electricity of varactor
Capacitance, accordingly to change the level of impedance match of second antenna.
Above-mentioned wireless communication device outputs control signals to transfiguration by CPU when the second antenna is in running order
Diode optimizes the varactor to match circuit, provides impedance matching jointly for the second antenna；When the second antenna
When being in idle condition, which outputs control signals to varactor, makes the impedance matching mismatch Conditions of the second antenna,
The working frequency range of second antenna deviates the working frequency range of first antenna, does to reduce the second antenna to first antenna
It disturbs.
Detailed description of the invention
Fig. 1 is the functional block diagram of the wireless communication device of present pre-ferred embodiments.
Main element symbol description
| Wireless communication device | 100 |
| CPU | 10 |
| Anneta module | 20 |
| Match circuit | 30 |
| First antenna | 40 |
| Second antenna | 50 |
| Varactor | VD |
The present invention that the following detailed description will be further explained with reference to the above drawings.
Specific embodiment
Referring to Fig. 1, presently preferred embodiments of the present invention provides a kind of wireless communication device 100, it can be mobile phone, a number
Word assistant (PDA), tablet computer etc..The wireless communication device 100 includes central processing unit (Central Processing
Unit, CPU) 10, Anneta module 20, match circuit 30, first antenna 40, the second antenna 50 and varactor VD.
The CPU10 is used to export corresponding control signal according to the working condition of Anneta module 20 to varactor VD.
Specifically, which is electrically connected to Anneta module 20, for detecting the working condition of Anneta module 20.The CPU10 is equipped with a control
Pin GPIO processed, when the Anneta module 20 is in idle condition, which exports a low level control signal；When
When the Anneta module 20 is in running order, which exports a high-level control signal.
The Anneta module 20 and match circuit 30 are electrically connected, for carrying out letter by match circuit 30 and the second antenna 50
Number transmission so that second antenna 50 transmitting-receiving special frequency channel wireless signal.
The match circuit 30 and the second antenna 50 are electrically connected, for being jointly that the second antenna 50 mentions with varactor VD
For impedance matching.Varactor VD plus earth, cathode are electrically connected to the node between CPU10 and match circuit 30,
It is input to varactor VD voltage by changing, can make varactor VD that there is corresponding capacitance.In this way, can be realized
Optimization to match circuit 30, thus the matching impedance of the second antenna 50 of optimization.In the present embodiment, 50 impedance of the second antenna
At perception, facilitate the tuning of varactor VD.
The working frequency range of the first antenna 40 and the second antenna 50 is close or the overlapping of part working frequency range, thus this first
There is the possibility interfered with each other in antenna 40 and the second antenna 50.In present embodiment, which is wireless communication device
100 primary antenna can work in frequency ranges such as UMTS, TD-SCDMA.Second antenna 50 be wireless communication device 100 BT,
WIFI or GPS antenna.
Illustrate the application method of the wireless communication device 100 in two kinds of situation below.
When the second antenna 50 of wireless communication device 100 is in idle condition, which exports low level control signal
To varactor VD, voltage needed for which is not enough to reach varactor VD, thus the transfiguration two
Pole pipe VD does not optimize match circuit 30, and the impedance matching of second antenna 50 is in mismatch Conditions, i.e. the second antenna 50
Working frequency range can deviate so that working frequency range of the working frequency range far from first antenna 40 of the second antenna 50, to drop
The possibility that the transmitting-receiving performance of low first antenna 40 is influenced by the second antenna 50.
When the second antenna 50 of wireless communication device 100 is in running order, which exports high-level control signal
To varactor VD, voltage needed for which reaches varactor VD has varactor VD
Have corresponding capacitance, so that varactor VD optimizes match circuit 30, varactor VD with match electricity
Road 30 provides impedance matching jointly for the second antenna 50.
Wireless communication device 100 of the invention passes through the high electricity of CPU10 output when the second antenna 50 is in running order
Flat control signal makes varactor VD have corresponding capacitance, thus varactor VD to varactor VD
Match circuit 30 is optimized, provides impedance matching jointly for the second antenna 50.Meanwhile when the second antenna is in idle condition
When, which exports low level control signal to varactor VD, which is not enough to reach two pole of transfiguration
Voltage needed for pipe VD, so that varactor VD does not optimize match circuit 30, and then the work of the second antenna 50
Frequency range deviates the working frequency range of first antenna 40, to reduce interference of second antenna 50 to first antenna 40.
Claims (3)
1. a kind of wireless communication device, including first antenna similar in working frequency range and the second antenna, it is characterised in that: this is wireless
Communication device further includes CPU, match circuit, Anneta module and the varactor for being electrically connected to match circuit, the antenna mould
Block is electrically connected between the CPU and the match circuit, which is electrically connected to second antenna, the varactor
Impedance matching is provided for the second antenna jointly with match circuit；The CPU detects the work shape of the second antenna by the Anneta module
State, and corresponding control signal is exported according to the working condition of the second antenna, which controls the capacitor of varactor
Value, accordingly to change the level of impedance match of second antenna；When second antenna is in normal operating conditions, CPU is defeated
High-level control signal makes the varactor have corresponding capacitance, so that the second antenna reaches to varactor out
Normal impedance matching；When second antenna is in idle condition, CPU exports low level control signal to two pole of transfiguration
Pipe, makes the impedance matching mismatch Conditions of the second antenna.
2. wireless communication device as described in claim 1, it is characterised in that: the varactor plus earth, cathode electricity
Property is connected to the node between CPU and match circuit.
3. wireless communication device as claimed in claim 2, it is characterised in that: second antenna impedance is at 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 CN104681984A (en) | 2015-06-03 |
| CN104681984B true CN104681984B (en) | 2019-05-21 |
Family
ID=53316746
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 |
|---|---|
| CN (1) | CN104681984B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107026671B (en) * | 2016-02-01 | 2020-03-17 | 北京小米移动软件有限公司 | Isolation control circuit and 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 |
| 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 |
| 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 |
Citations (2)
| 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 |
| 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 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4150053B2 (en) * | 2006-12-19 | 2008-09-17 | 株式会社東芝 | Wireless communication device and wireless communication method |
| DE112010006030T5 (en) * | 2010-11-25 | 2013-09-05 | 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 (2)
| 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 |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104681984A (en) | 2015-06-03 |
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Granted publication date: 20190521 Termination date: 20211129 |