CN104638362B - Wireless communication device - Google Patents
Wireless communication device Download PDFInfo
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- CN104638362B CN104638362B CN201310568450.6A CN201310568450A CN104638362B CN 104638362 B CN104638362 B CN 104638362B CN 201310568450 A CN201310568450 A CN 201310568450A CN 104638362 B CN104638362 B CN 104638362B
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Abstract
The present invention provides a kind of wireless communication device, it includes first antenna, the second antenna, processor, adjustment unit and match circuit, the processor and adjustment unit are electrically connected, the adjustment unit is electrically connected by match circuit and first antenna, the processor is used to export high level or low level according to the received signal strength of the second antenna to change or maintain the circuit parameter of adjustment unit, so that the adjustment unit and match circuit adjust the impedance of first antenna jointly.The problem of wireless communication device can effectively improve isolation between antennas.
Description
Technical field
The present invention relates to a kind of wireless communication device more particularly to a kind of wireless communication dresses that can improve double-antenna isolation
It sets.
Background technique
Currently, part wireless communication device uses dual mode system, such as global mobile communication (Global System for
Mobile Communication, GSM) system and CDMA (Code Division Multiple Access, CDMA) system
System.Wherein, the frequency range of gsm system is about 880-960MHz, and the frequency range of cdma system is about 824-894MHz.Due to the two frequency range
There is overlapping, when wireless communication device in use, isolation between antennas can be led to the problem of, usual gsm system influences whether CDMA system
The use of system causes the efficiency of cdma system transmitting/receiving wireless signal to reduce, influences speech quality.
Summary of the invention
In view of the foregoing, it is necessary to which a kind of wireless communication device that can improve double-antenna isolation is provided.
A kind of wireless communication device comprising first antenna, the second antenna, processor, adjustment unit and match circuit, it should
Processor and adjustment unit are electrically connected, which is electrically connected by match circuit and first antenna, which uses
In exporting high level or low level according to the received signal strength of the second antenna to change or maintain the circuit parameter of adjustment unit,
So that the adjustment unit and match circuit adjust the impedance of first antenna jointly.
A kind of wireless communication device comprising first antenna, the second antenna, processor, adjustment unit and match circuit, it should
Processor and adjustment unit are electrically connected, which is electrically connected by match circuit and first antenna, which uses
In the second antenna received signal strength decline when export high level, adjustment unit capacitance under the control of high level
It increases, to generate offset with the working frequency range of match circuit co- controlling first antenna.
Received signal strength of the above-mentioned wireless communication device using processor according to the second antenna exports high level or low
Level changes the capacitance of adjustment unit whereby, it is made to adjust the impedance matching of first antenna jointly with match circuit.Therefore,
When the second antenna is in use state, which can generate frequency deviation, thus it is not Chong Die with the working frequency range of the second antenna,
The problem of isolation between antennas to improve the wireless communication device.
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 |
| Processor | 10 |
| Transmitter | 20 |
| Radio-frequency front-end | 30 |
| Adjustment unit | 40 |
| Match circuit | 50 |
| First antenna | 60 |
| Second antenna | 70 |
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 is operable with different systems, such as gsm system, time-division are same
Walk CDMA (Time Division-Synchronous Code Division Multiple Access, TDSCDMA) system
System and cdma system etc..In the present embodiment, it is with the wireless communication device 100 for working at the same time in gsm system and cdma system
Example is introduced.
The wireless communication device 100 includes processor 10, transmitter 20, radio-frequency front-end 30, adjustment unit 40, match circuit
50, first antenna 60 and the second antenna 70.In the present embodiment, which is GSM antenna, is set to wireless communication
One end of device 100, working frequency range are about 880-960MHz；Second antenna 70 is CDMA antenna, is set to wireless communication
The other end of device 100, working frequency range are about 824-894MHz.
The processor 10 and transmitter 20 are electrically connected, and for demodulating the wireless signal transmitted by transmitter 20, and are used for
It is radiofrequency signal to be sent to transmitter 20 by modulates baseband signals.
In addition, the processor 10 and the second antenna 70 are electrically connected, which further includes that one universal input/output connects
Mouthful (General Purpose Input Output, GPIO), the processor 10 are also used to the according to wireless communication device 100
Received signal strength (Received Signal Strength Indication, RSSI) the control universal input of two antennas 70/
Output interface GPIO exports high level or low level.Specifically, which was stored in advance a reference intensity value, when second day
When the received signal strength RSSI of line 70 is lower than the reference intensity value, the universal input/output interface GPIO exports high level；When
When the received signal strength RSSI of second antenna 70 is higher than the reference intensity value, the universal input/output interface GPIO output is low
Level.
The transmitter 20 is electrically connected between processor 10 and radio-frequency front-end 30, for radiofrequency signal to be sent to radio frequency
Front end 30.The radio-frequency front-end 30 is used to the processing such as be filtered radiofrequency signal, amplify, which also further passes through
Match circuit 50 and first antenna 60 are electrically connected, to send radiofrequency signal by first antenna 60.
The adjustment unit 40 electrically connects with universal input/output interface GPIO of processor 10 and match circuit 50 simultaneously
It connects, which is used under universal input/output interface GPIO output high level or low level control, with matching
Circuit 50 adjusts the impedance of first antenna 60 jointly.In the present embodiment, which is a varactor
(Varactor), there is an initial capacitance value, and the initial capacitance value changes with the variation of the voltage of additional direct current.
The adjustment unit 40 has a threshold voltage, when the voltage of additional electric signal is higher than threshold voltage, the varactor
Initial capacitance value increases；When the voltage of additional electric signal is lower than threshold voltage, the initial capacitance value of the varactor is not
Become.By selecting the circuit parameter of match circuit 50 and the initial capacitance value of adjustment unit 40, first antenna 60 can be made to exist
Normal transmitting/receiving wireless signal in scheduled frequency range；By the initial capacitance value of change (raising) adjustment unit 40, can make
The working frequency range of first antenna 60 is suitably toward high frequency offset.
The application method of the wireless communication device 100 is further illustrated below.When wireless communication device 100 is needed using
When two antennas 70 (for example, in state is answered), due to the working frequency range of first antenna 60 and the working frequency range of the second antenna 70
It partly overlaps, the received signal strength RSSI of the second antenna 70 is caused to reduce.At this point, when the received signal strength of the second antenna 70
When RSSI is lower than the reference intensity value that processor 10 prestores, universal input/output interface GPIO of processor 10 exports high level.
When the voltage of the high level is higher than the threshold voltage of adjustment unit 40, the initial capacitance value of adjustment unit 40 is increased.At this point, the
The impedance matching of one antenna 60 by adjustment unit 40 change after capacitance and match circuit 50 codetermine.
It should be noted that for when ensuring that the received signal strength RSSI of the second above-mentioned antenna 70 is reduced to a certain extent
It is enough to change the capacitance of adjustment unit 40, reasonable reference intensity value and selection, which is arranged, for processor 10 has suitable thresholding
The adjustment unit 40 of voltage is very important.
On the other hand, which is radiofrequency signal by modulates baseband signals, which emits radiofrequency signal, should
Radiofrequency signal enters match circuit 50 after the processing of radio-frequency front-end 30, and launches via first antenna 60.Due at this time
The initial capacitance value of adjustment unit 40 increases, therefore the impedance matching of first antenna 60 obtains appropriate adjustment, first antenna 60
Working frequency range is suitably toward high frequency offset, thus not Chong Die with the working frequency range of the second antenna 70.In this way, being beneficial to improve the nothing
The problem of isolation between antennas of line communication device 100, is convenient for the normal transmitting/receiving wireless signal of the second antenna 70.
When wireless communication device 100 is in standby, the second antenna 70 is temporarily not used by (answers for example, being not in
State), processor 10 exports low level, and the initial capacitance value of adjustment unit 40 will not change.At this point, the impedance of first antenna 60
Matching is codetermined by the initial capacitance value and match circuit 50 of adjustment unit 40, allows first antenna 60 in preset frequency
Normal transmitting/receiving wireless signal in range.
It is worked at the same time in gsm system and cdma system, also it is appreciated that wireless communication device 100 of the invention does not limit to
Can work at the same time in gsm system+TD SDMA TDSCDMA system and gsm system, or work in gsm system+
Wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA) system and gsm system.It is corresponding
, first antenna 60 and the second antenna 70 are adjusted, to work in corresponding working frequency range.
Wireless communication device 100 of the invention is defeated according to the received signal strength RSSI of the second antenna 70 using processor 10
High level or low level out change the capacitance of adjustment unit 40 whereby, it is made to adjust first antenna jointly with match circuit 50
60 impedance matching.Therefore, when the second antenna 70 is in use state, which can generate frequency deviation, thus not with
The problem of working frequency range of second antenna 70 is overlapped, isolation between antennas to improve the wireless communication device 100.
Claims (10)
1. a kind of wireless communication device comprising first antenna and the second antenna, the working frequency range of first antenna and the second antenna
Working frequency range partly overlap, it is characterised in that: the wireless communication device further includes processor, adjustment unit and match circuit,
The processor and adjustment unit are electrically connected, which is electrically connected by match circuit and first antenna, the processor
For exporting high level or low level according to the received signal strength of the second antenna to change or maintain the circuit of adjustment unit to join
Number, so that the adjustment unit and match circuit adjust the impedance of first antenna jointly and then adjust the working frequency range of first antenna,
So that the working frequency range of first antenna is not Chong Die with the working frequency range of the second antenna.
2. wireless communication device as described in claim 1, it is characterised in that: the processor includes that universal input/output connects
Mouthful, the universal input/output interface and adjustment unit are electrically connected, for exporting high level or low level.
3. wireless communication device as claimed in claim 2, it is characterised in that: a referenced strength is stored in advance in the processor
Value, when the received signal strength of the second antenna is lower than the reference intensity value, the universal input/output interface exports high level；
When the received signal strength of the second antenna is higher than the reference intensity value, the universal input/output interface exports low level.
4. wireless communication device as described in claim 1, it is characterised in that: the adjustment unit is varactor, tool
There are an initial capacitance value and a threshold voltage, when the voltage of the high level is higher than threshold voltage, at the beginning of the varactor
Beginning capacitance increases；When the low level voltage is lower than threshold voltage, the initial capacitance value of the varactor is constant.
5. wireless communication device as described in claim 1, it is characterised in that: the wireless communication device further include transmitter and
Radio-frequency front-end, the processor be used for by modulates baseband signals be radiofrequency signal, the transmitter be electrically connected at processor with
Between radio-frequency front-end, for radiofrequency signal to be sent to radio-frequency front-end, the radio-frequency front-end and match circuit are electrically connected, are used for
Radiofrequency signal is filtered, enhanced processing.
6. a kind of wireless communication device comprising first antenna and the second antenna, the working frequency range of first antenna and the second antenna
Working frequency range partly overlap, it is characterised in that: the wireless communication device further includes processor, adjustment unit and match circuit,
The processor and adjustment unit are electrically connected, which is electrically connected by match circuit and first antenna, the processor
For exporting high level, adjustment unit capacitor under the control of high level in the received signal strength decline of the second antenna
Value increase, with the working frequency range of match circuit co- controlling first antenna generate deviate so that the working frequency range of first antenna not
It is Chong Die with the working frequency range of the second antenna.
7. wireless communication device as claimed in claim 6, it is characterised in that: the processor includes that universal input/output connects
Mouthful, the universal input/output interface and adjustment unit are electrically connected, for exporting one low level of the high level or output.
8. wireless communication device as claimed in claim 7, it is characterised in that: a referenced strength is stored in advance in the processor
Value, when the received signal strength of the second antenna is lower than the reference intensity value, the universal input/output interface exports high level；
When the received signal strength of the second antenna is higher than the reference intensity value, the universal input/output interface exports low level.
9. wireless communication device as claimed in claim 8, it is characterised in that: the adjustment unit is varactor, tool
There are an initial capacitance value and a threshold voltage, when the voltage of the high level is higher than threshold voltage, at the beginning of the varactor
Beginning capacitance increases；When the low level voltage is lower than threshold voltage, the initial capacitance value of the varactor is constant.
10. wireless communication device as claimed in claim 6, it is characterised in that: the wireless communication device further includes transmitter
And radio-frequency front-end, the processor are used to modulates baseband signals be radiofrequency signal, the transmitter is electrically connected at processor
Between radio-frequency front-end, for radiofrequency signal to be sent to radio-frequency front-end, the radio-frequency front-end and match circuit are electrically connected, use
In radiofrequency signal is filtered, enhanced processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310568450.6A CN104638362B (en) | 2013-11-15 | 2013-11-15 | Wireless communication device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310568450.6A CN104638362B (en) | 2013-11-15 | 2013-11-15 | Wireless communication device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104638362A CN104638362A (en) | 2015-05-20 |
| CN104638362B true CN104638362B (en) | 2019-05-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310568450.6A Active CN104638362B (en) | 2013-11-15 | 2013-11-15 | Wireless communication device |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111585003B (en) * | 2020-05-22 | 2022-02-01 | 甬矽电子(宁波)股份有限公司 | IC packaging radio frequency structure and manufacturing method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1808916A (en) * | 2005-01-21 | 2006-07-26 | 乐金电子(中国)研究开发中心有限公司 | Antenna impedance matching device adapts to multi-mode mobile communication terminal |
| CN1822512A (en) * | 2005-02-18 | 2006-08-23 | 乐金电子(中国)研究开发中心有限公司 | RF signal matching device of mobile communication terminal |
| CN103380576A (en) * | 2010-11-08 | 2013-10-30 | 黑莓有限公司 | Method and appartus for tuning antennas in a communication device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1298810B8 (en) * | 2001-09-27 | 2007-12-12 | Kabushiki Kaisha Toshiba | Portable type radio equipment |
| JP4150053B2 (en) * | 2006-12-19 | 2008-09-17 | 株式会社東芝 | Wireless communication device and wireless communication method |
| WO2012066838A1 (en) * | 2010-11-18 | 2012-05-24 | 株式会社村田製作所 | Antenna device |
| DE112010006030T5 (en) * | 2010-11-25 | 2013-09-05 | Epcos Ag | Mobile communication device with improved antenna performance |
-
2013
- 2013-11-15 CN CN201310568450.6A patent/CN104638362B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1808916A (en) * | 2005-01-21 | 2006-07-26 | 乐金电子(中国)研究开发中心有限公司 | Antenna impedance matching device adapts to multi-mode mobile communication terminal |
| CN1822512A (en) * | 2005-02-18 | 2006-08-23 | 乐金电子(中国)研究开发中心有限公司 | RF signal matching device of mobile communication terminal |
| CN103380576A (en) * | 2010-11-08 | 2013-10-30 | 黑莓有限公司 | Method and appartus for tuning antennas in a communication device |
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| Publication number | Publication date |
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| CN104638362A (en) | 2015-05-20 |
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