CN1226894C - Antenna able to reduce voltage standing-wave ratio - Google Patents
Antenna able to reduce voltage standing-wave ratio Download PDFInfo
- Publication number
- CN1226894C CN1226894C CNB011169885A CN01116988A CN1226894C CN 1226894 C CN1226894 C CN 1226894C CN B011169885 A CNB011169885 A CN B011169885A CN 01116988 A CN01116988 A CN 01116988A CN 1226894 C CN1226894 C CN 1226894C
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- antenna
- voltage standing
- antenna element
- element part
- plain conductor
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Abstract
The present invention provides an antenna capable of reducing a voltage standing wave ratio, which comprises an antenna element part and a grounding part, wherein the antenna element part is electrically connected with a radio-frequency circuit so as to act in at least one frequency band; the grounding part is electrically connected with the antenna element part so as to provide a grounding function. The antenna is characterized in that the periphery of the antenna element part is also electrically connected with at least one metal conductive wire in order to change current distribution so as to reach the effect of reducing the voltage standing wave ratio.
Description
Technical field
The present invention is about a kind of antenna, particularly a kind of antenna of able to reduce voltage standing ratio.
Background technology
Because the arriving in mobile communication epoch, make mobile phone handsets become one of essential product of individual's use with oneself gradually, because of making in the production design of mobile phone, become the important consideration factor of mobile phone products for Portability and aesthetic property, make that mobile phone is obviously towards short and small frivolous trend development in recent years.In addition, be subject to external force and damage and destroy the mobile phone overall aesthetic for fear of the antenna of exposed conveying appliance, thus in the concealed antenna that is built in the mobile phone become trend.
As Fig. 1, be a kind of traditional steady concealed dual-band antenna 1.This antenna 1 is made of conductive material and comprises an antenna element part 11 and a grounding parts 12.Antenna element part 11 is tortuous circuit path, roughly can be divided into one and be used to the second portion 112 of a low-frequency signal in order to the first 111 and that responds a high-frequency signals, and this high-frequency signals is a DSC signal (for example 1800MHz), and low-frequency signal is a GSM signal (for example 900MHz), and the length of this first 111 equals the quarter-wave of high-frequency signals (1/4 λ
H), and the length of second portion 112 equals quarter-wave long wavelength (1/4 λ of low-frequency signal
L).This antenna element part 11 more is electrically connected to a radio circuit that is arranged in the mobile phone, makes radio circuit to receive or launch high frequency and low-frequency signal by this antenna element part 11.Grounding parts 12 is a cuboid and is electrically connected to this antenna element part 11, so that the ground connection effect to be provided.
Yet, because mobile phone miniaturization, allowing can be more and more limited for the space of holding electronic element, make the antenna that is assembled in the mobile phone to keep the safe enough distance with other electronic component, and cause both phase mutual interference, therefore the impedance situation that do not match or the like may take place, allow the reflectivity of antenna signal increase thereupon, and make the signal standing wave increase, that is the voltage standing wave ratio of signal (Voltage StandingWave Ratio) increases, make signal effectively to launch, and influence the communication effect of mobile phone.
Summary of the invention
Therefore, purpose of the present invention is promptly providing a kind of antenna that falls voltage standing wave ratio, to reach the effect that reduces voltage standing wave ratio.
So, the antenna of able to reduce voltage standing ratio of the present invention, be suitable for being electrically connected to a radio circuit, this aerial system has one and is suitable for working at least one frequency band and the antenna element part and that is electrically connected to this radio circuit electrically connects the grounding parts of this antenna element part, this antenna element part has a first, can in first frequency band, work and a second portion can be different from second frequency band of first frequency band one and works, it is characterized in that:
Also connect at least one plain conductor around this grounding parts changing CURRENT DISTRIBUTION, and then reach the effect that reduces voltage standing wave ratio, this plain conductor compared to this second portion more near this first.
Description of drawings
Other features and advantages of the present invention in the DETAILED DESCRIPTION OF THE PREFERRED of following conjunction with figs., can clearly be understood, in the accompanying drawings:
Fig. 1 is a kind of schematic diagram of traditional built-in dual-band antenna.
Fig. 2 is the schematic diagram of the antenna of the preferred embodiment of the present invention.
Fig. 3 is the test result curve chart of voltage standing wave ratio in the traditional built-in antenna and the preferred embodiment of the present invention.
Embodiment
Consulting Fig. 2, is the preferred embodiments of the present invention.This preferred embodiment is a concealed dual-band antenna 2.This antenna 2 comprises an antenna element part 3 and a grounding parts 4 substantially.
This antenna element part 3 is electrically connected to the radio circuit of mobile phone, in order to respond two kinds of different frequency signals, be used to the second portion 32 that works in second frequency band of different first frequency bands so have a first 31 and that is used to work in first frequency band, in this embodiment, first 31 is used for the DSC communication, so the scope of first frequency band is about 1700～1900MHz, the length of first 31 approximates quarter-wave (1/4 λ of DSC signal (for example 1800MHz)
H), second portion 32 is to be used for the GSM communication, so second frequency band range is about 800MHz～1000MHz, the length of second portion 32 approximates quarter-wave (1/4 λ of GSM signal (for example 900MHz)
L).It should be noted, the first 31 of aforementioned antenna element part 3 can need to adjust with second portion 32 according to the designer, the quarter-wave multiple that only needs its length to equal corresponding communication signal gets final product, for instance, first 31 can use PCS1900, AMPS or the like other and so on mechanics of communication, and the number of part 31,32 that antenna element part 3 comprises can determine according to the number of frequency bands that antenna is desired to work, for example the single part that can only work down in single frequency band should not be subject to present embodiment.
And the design of grounding parts 4 to change only be the setting of single rectangular area in the past, also around grounding parts 4, electrically connect a plain conductor 41 with suitable length, with the increase resonance point and change CURRENT DISTRIBUTION.And in the present embodiment in order to make grounding parts 4 overall profile that add behind the plain conductor 41 surpass the size of the grounding parts of traditional antenna, and cause assembling inconvenient, so that grounding parts 4 be arranged with in the position that is connected plain conductor 41 one with the breach 42 of these plain conductor 41 equal length, so that the free end of this plain conductor 41 does not exceed the size of traditional grounding parts, so the size of the antenna 2 of this embodiment equates approximately with traditional antenna size, thereby can directly be assembled in original predetermined position of assembling antenna in the mobile phone, need not change the mobile phone inner space and be configured to ccontaining different size antenna, borrow to draw and to shorten the research and development time.In addition, because the microminiaturization of mobile phone is so the size of grounding parts 41 is limited, so except utilizing breach 2 to control the overall dimensions of grounding parts 4, be a tortuous curve that extends also, to reach predetermined length and not surpass traditional grounding parts size as making plain conductor 41 among Fig. 2.When the antenna of present embodiment works, can change CURRENT DISTRIBUTION therefore make voltage standing wave ratio low compared to traditional antenna, especially in the present embodiment plain conductor 14 the relatively first 31 of adjacent antenna element portion 3 of position is set, so antenna increases by a resonance point and voltage standing wave ratio more can significantly be reduced in first frequency band, the reflective rate of signal is descended, and then to make the emission effciency of antenna signal be good compared to traditional antenna.
Please refer to Fig. 3, is the curve chart of voltage standing wave ratio of the antenna of traditional antenna and present embodiment, and wherein traditional antenna and the solid line CH2 of dotted line CH1 representative represents present embodiment.Traditional antenna and the antenna of present embodiment are similarly that being designed and sized to of the dual-band antenna that can use GSM and DSC communication signal and both antenna element parts is consistent descends, as showing among the figure, in first frequency band, can increase a resonance point (between position 4 and position 5) really, and make the voltage standing wave ratio in it decline to a great extent really.
Merit attention, the form of grounding parts 4 is not necessarily not as shown in Figure 2, can have multiple variation, as long as be connected at least one plain conductor around the grounding parts 4, for instance, can be connected a plain conductor 41 respectively with two appropriate locations of second portion 32 in the first 31 of grounding parts 4 adjacent antenna element portions 3, make antenna in two frequency bands, all can reach the effect that significantly reduces voltage standing wave ratio.
The above person of thought, only be the preferred embodiments of the present invention, can not limit scope of the present invention with this, all simple equivalent of doing according to claims scope of the present invention and description change and modify, and all should belong in the scope that patent of the present invention contains.
[element numbers contrast]
2 antennas, 4 grounding parts
3 antenna element parts, 41 plain conductors
31 firsts, 42 breach
32 second portions
Claims (4)
1. the antenna of an able to reduce voltage standing ratio, be suitable for being electrically connected to a radio circuit, this antenna has one and is suitable for working at least one frequency band and the antenna element part and that is electrically connected to this radio circuit electrically connects the grounding parts of this antenna element part, this antenna element part has a first, can in first frequency band, work and a second portion can be different from second frequency band of first frequency band one and works, it is characterized in that:
Also connect at least one plain conductor around this grounding parts changing CURRENT DISTRIBUTION, and then reach the effect that reduces voltage standing wave ratio, this plain conductor compared to this second portion more near this first.
2. the antenna of able to reduce voltage standing ratio as claimed in claim 1, wherein, the position that connects this plain conductor in this grounding parts also is arranged with the breach of the length of this plain conductor of cooperation.
3. the antenna of able to reduce voltage standing ratio as claimed in claim 1, wherein, the first of this antenna element part is applied to the digital mobile telephone system signal, and this second portion is applied to the Global Systems for Mobile communications signal.
4. the antenna of able to reduce voltage standing ratio as claimed in claim 1, wherein, this plain conductor is a curve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011169885A CN1226894C (en) | 2001-05-21 | 2001-05-21 | Antenna able to reduce voltage standing-wave ratio |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011169885A CN1226894C (en) | 2001-05-21 | 2001-05-21 | Antenna able to reduce voltage standing-wave ratio |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1387380A CN1387380A (en) | 2002-12-25 |
| CN1226894C true CN1226894C (en) | 2005-11-09 |
Family
ID=4662650
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011169885A Expired - Fee Related CN1226894C (en) | 2001-05-21 | 2001-05-21 | Antenna able to reduce voltage standing-wave ratio |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1226894C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI580111B (en) * | 2015-07-09 | 2017-04-21 | 廣達電腦股份有限公司 | Communication device |
-
2001
- 2001-05-21 CN CNB011169885A patent/CN1226894C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1387380A (en) | 2002-12-25 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20051109 Termination date: 20150521 |
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| EXPY | Termination of patent right or utility model |