CN1808916A - Antenna impedance matching device adapts to multi-mode mobile communication terminal - Google Patents
Antenna impedance matching device adapts to multi-mode mobile communication terminal Download PDFInfo
- Publication number
- CN1808916A CN1808916A CNA200510105802XA CN200510105802A CN1808916A CN 1808916 A CN1808916 A CN 1808916A CN A200510105802X A CNA200510105802X A CN A200510105802XA CN 200510105802 A CN200510105802 A CN 200510105802A CN 1808916 A CN1808916 A CN 1808916A
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- China
- Prior art keywords
- impedance matching
- antenna
- communication terminal
- mobile communication
- mentioned
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/50—Feeding or matching arrangements for broad-band or multi-band operation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/38—Impedance-matching networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
- H04B1/0053—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/401—Circuits for selecting or indicating operating mode
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Transmitters (AREA)
- Details Of Aerials (AREA)
- Transceivers (AREA)
Abstract
The invention discloses an antenna impedance matching device adapting to multi-mode mobile communication terminal belonging to mobile communication terminal component field. The invention comprises an antenna with more than two operating modes; an impedance matching part between the antenna and a signal input side enabling least impedance of the reflective power; a variable capacitor connected to the impedance matching part with the capacitance varying with the voltage variation; a power supplying part supplying power to the variable capacitor; an impedance matching control part for controlling power of the power supplying part according to the above-mentioned more than two operating modes. The invention has an antenna matching circuit varying with the antenna operating mode, thus realizing good antenna impedance matching.
Description
Technical field
The invention belongs to the components range of mobile communication terminal, especially relate at a kind of Antenna Impedance Matching device that is applicable to the multiplex mode mobile communication terminal of the mobile communication terminal with multiplex mode antenna according to each frequency band control match circuit impedance.
Background technology
Impedance matching is meant adjusts the impedance on the surface of these two circuit at tie point when connecting two circuit and transmitting electric power, thereby transmits maximum power.That is, if impedance does not match, can't correctly transmit electric power, and then power loss takes place, therefore the effect of the factor is especially wanted in above-mentioned impedance matching in the circuit lifting that transmits electric power.
In addition, if voltage is arranged having on the circuit of reflection, electric current incident, produce the voltage of above-mentioned incident, the incident wave of electric current and its reflected wave, produce above-mentioned incident wave and the synthetic ripple of reflected wave on the circuit, this ripple is standing wave, and the ratio of the maximum of the standing wave that produces on the above-mentioned electric wave transmission lines and minimum value is standing-wave ratio (SWR; Standing Wave Radio).At this moment, by measure above-mentioned standing-wave ratio can judge impedance matching how good, and standing-wave ratio is more near ' 1 ', the impedance matching of transmission lines is judged as better.
Antenna-matching circuit to existing mobile communication terminal describes.The antenna-matching circuit of existing mobile communication terminal utilizes resistance R, and inductance L, capacitor C constitute series connection and in parallel, by the above-mentioned resistance of suitable adjusting, and inductance, the value matched impedance of electric capacity also receives electric wave best.
But, above-mentioned by resistance, in the antenna-matching circuit that inductance, electric capacity constitute, above-mentioned resistance, inductance, the value of electric capacity is fixed, so the resistance value that has of antenna-matching circuit is not according to the frequency change of the electric wave that receives.Like this, the antenna-matching circuit with fixing resistance value has SWR value minimum in the intermediate frequency, thereby resistance value mates finely, have than higher SWR value in low frequency and high-frequency, thereby impedance matching gets poorly.Mobile communication terminal must all frequencies use wave bands, intermediate frequency show low SWR value and impedance matching get fine, low frequency and high-frequency show relative high SWR value also impedance matching get bad.Promptly, as mentioned above, existing that mobile communication terminal gets antenna-matching circuit by resistance, inductance, electric capacity constitutes, and because above-mentioned resistance, inductance, therefore the value of electric capacity is fixed, and exists to carry out the suitable resistance coupling according to the variation of the frequency of the electric wave that receives, especially the problem that obviously descends in the effect of low frequency and high-frequency collection of letters signal impedance coupling.
In addition, as for the antenna that is operated in bimodulus, antenna need mate simultaneously two frequencies, therefore can only be therein optimum frequency point or design match circuit in wave band at the suitable mid point of two wave bands, antenna can't be more correctly mated in existence.
Summary of the invention
The object of the invention is by the antenna-matching circuit in dual-mode antenna, the variable capacitance diode that uses capacitance to change with the control power values, when the change mode of operation, according to the antenna circuit that the pattern of change is suitably mated, carry out the Antenna Impedance Matching device that is applicable to the multiplex mode mobile communication terminal of optimized impedance matching.It is characterized in that: the described antenna matching unit that is applicable to mobile communication terminal comprises: at the antenna part of the mode of operation work more than 2; Between above-mentioned antenna and signal input side, has the impedance matching portion that makes the minimized impedance of reflection electric power; Be connected to above-mentioned impedance matching portion and along with change in voltage, the variable capacitance portion that capacitance is variable; Power supply control part to the power supply of above-mentioned variable capacitance portion; According to above-mentioned mode of operation more than 2, control the impedance matching portion of the power supply of above-mentioned power supply control part.
The invention has the beneficial effects as follows that the present invention has the antenna-matching circuit according to the mode of operation change of antenna, can realize better Antenna Impedance Matching.
Description of drawings
Fig. 1 is the embodiment schematic diagram according to antenna impedance matching of the present invention.
Fig. 2 and Fig. 3 are the embodiment schematic diagram of the impedance of antenna at the state of each mode of operation coupling.
Embodiment
Below, describe in detail according to preferred embodiment of the present invention with reference to accompanying drawing.
Fig. 1 is the embodiment schematic diagram according to antenna impedance matching of the present invention.As Fig. 1, comprising: antenna 11 comprises the impedance matching circuit 12 of variable capacitance diode, resistance 13, control power supply circuit 14 and mobile station modems (MSM; Mobile Station Modem) 15 and variable capacitance diode 16.
At first, antenna 11 signal that will receive from mobile communication terminal or that send emits to the space.At this moment, between antenna and signal transmission end, need impedance matching, and this impedance matching forms at impedance matching circuit 12.
Dual-mode antenna using two frequency bands can change according to each frequency impedance, therefore uses the match circuit with fixing resistance value to be difficult to carry out correct impedance matching.
Thereby, in the present invention, compare with situation at the antenna 11 of bimodulus, allow to carry out more accurate impedance matching.According to each mode of operation, the high situation and the low situation of frequency of frequency of MSM15 difference electric wave, output is according to the control signal of frequency.
That is, when the frequency of the 1st mode of operation and the 2nd mode of operation not simultaneously, calculate the value of carrying out best impedance matching in each frequency.And, in control power supply circuit generation correspondent voltage, these values are kept.
Below this is described in detail.The MSM15 of mobile communication terminal is to the control power suppling part.That is, use variable capacitance diode 16, when the mode of operation change of terminal, the control voltage of variable capacitance diode 16 is changed together, thereby antenna match point can be moved to the operating frequency wave band direction that changes at antenna-matching circuit.
At first, ask and make it have the control voltage V1 and the V2 of the variable capacitance diode of the matching value that is suitable for the 1st mode of operation and the 2nd mode of operation.This magnitude of voltage is stored in MSM, and MSM makes its control power supply circuit that control voltage V1 value takes place in the 1st mode of operation setting, makes it that control power supply circuit of control voltage V2 take place in the 2nd mode of operation setting.Thereby the control power supply circuit meets the control power supply of mode of operation to the variable capacitance diode supply, thereby changes the capacitance of variable capacitance diode, and the antenna match point is moved to the point that is suitable for mode of operation most.
Fig. 2 and Fig. 3 are the embodiment schematic diagram of the impedance of antenna at the state of each mode of operation coupling.Fig. 2 and shown in Figure 3 uses control power supply circuit and variable capacitance diode to realize antenna matching unit according to antenna matching unit of the present invention, thereby can also can carry out more correct impedance matching double mode.
As described above, the technical staff with common knowledge can carry out various displacements in the scope that does not break away from technological thought of the present invention, distortion and change, thus be not to be confined to aforesaid embodiment and accompanying drawing.
Claims (4)
1. an Antenna Impedance Matching device that is applicable to the multiplex mode mobile communication terminal is characterized in that comprising: the antenna with two above mode of operations; Between antenna and signal input side, has the impedance matching portion that makes reflection electric power minimum impedance; Be connected to above-mentioned impedance matching portion, and along with the variable variable capacitance portion of the capacitance of change in voltage; Power suppling part to the power supply of variable capacitance portion; Control the impedance matching control part of the power supply of above-mentioned power suppling part according to above-mentioned two above mode of operations.
2. according to the described Antenna Impedance Matching device that is applicable to the multiplex mode mobile communication terminal of claim 1, it is characterized in that: above-mentioned impedance matching portion is combined to form by an inductance or electric capacity at least.
3. according to the described Antenna Impedance Matching device that is applicable to the multiplex mode mobile communication terminal of claim 1, it is characterized in that: above-mentioned variable capacitance portion is a variable capacitance diode.
4. according to the described Antenna Impedance Matching device that is applicable to the multiplex mode mobile communication terminal of claim 1, it is characterized in that: above-mentioned impedance matching control part is for moving the modulator-demodulator MSM of office.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020050005729 | 2005-01-21 | ||
| KR1020050005729A KR20060084955A (en) | 2005-01-21 | 2005-01-21 | Apparatus for anetnna inpedance matching in multi mode mobile phone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1808916A true CN1808916A (en) | 2006-07-26 |
Family
ID=36840646
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA200510105802XA Pending CN1808916A (en) | 2005-01-21 | 2005-09-27 | Antenna impedance matching device adapts to multi-mode mobile communication terminal |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR20060084955A (en) |
| CN (1) | CN1808916A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102725940A (en) * | 2010-01-26 | 2012-10-10 | 爱考斯研究株式会社 | Non-contact power transmission system and non-contact power transmission apparatus |
| CN104638362A (en) * | 2013-11-15 | 2015-05-20 | 深圳富泰宏精密工业有限公司 | Wireless communicator |
| CN112713948A (en) * | 2021-03-17 | 2021-04-27 | 北京紫光青藤微系统有限公司 | Method and system for calibrating variable electronic component parameters |
| CN114584156A (en) * | 2020-12-02 | 2022-06-03 | 杭州海康威视数字技术股份有限公司 | Monitoring device and communication control method thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101382818B1 (en) * | 2007-10-26 | 2014-04-09 | 엘지이노텍 주식회사 | Impedance matching apparatus |
-
2005
- 2005-01-21 KR KR1020050005729A patent/KR20060084955A/en not_active Application Discontinuation
- 2005-09-27 CN CNA200510105802XA patent/CN1808916A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102725940A (en) * | 2010-01-26 | 2012-10-10 | 爱考斯研究株式会社 | Non-contact power transmission system and non-contact power transmission apparatus |
| CN104638362A (en) * | 2013-11-15 | 2015-05-20 | 深圳富泰宏精密工业有限公司 | Wireless communicator |
| CN104638362B (en) * | 2013-11-15 | 2019-05-21 | 深圳富泰宏精密工业有限公司 | Wireless communication device |
| CN114584156A (en) * | 2020-12-02 | 2022-06-03 | 杭州海康威视数字技术股份有限公司 | Monitoring device and communication control method thereof |
| CN114584156B (en) * | 2020-12-02 | 2024-05-10 | 杭州海康威视数字技术股份有限公司 | Monitoring device and communication control method thereof |
| CN112713948A (en) * | 2021-03-17 | 2021-04-27 | 北京紫光青藤微系统有限公司 | Method and system for calibrating variable electronic component parameters |
| CN112713948B (en) * | 2021-03-17 | 2021-07-13 | 北京紫光青藤微系统有限公司 | Method and system for calibrating variable electronic component parameters |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20060084955A (en) | 2006-07-26 |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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