CN1238926C - Multi-frequency mobile telephone antenna - Google Patents
Multi-frequency mobile telephone antenna Download PDFInfo
- Publication number
- CN1238926C CN1238926C CN 02122405 CN02122405A CN1238926C CN 1238926 C CN1238926 C CN 1238926C CN 02122405 CN02122405 CN 02122405 CN 02122405 A CN02122405 A CN 02122405A CN 1238926 C CN1238926 C CN 1238926C
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- China
- Prior art keywords
- antenna
- frequency
- mobile phone
- plate aerial
- plane
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- Expired - Fee Related
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Abstract
The present invention provides a multi-frequency antenna for mobile phones, which comprises a flat plate antenna used as a low-frequency antenna, a planar loop antenna which is adjacent to one side of the flat plate antenna and is used as a high-frequency antenna, and a parasitic element which is adjacent to the flat plate antenna and the planar loop antenna to support and to be coupled with the flat plate antenna. In this way, the influence of the grounding surface of a mobile phone on the antenna gain can be reduced, and the frequency bandwidth width of high-frequency and low-frequency antennae.
Description
Technical field
The invention relates to a kind of mobile phone antenna, be meant a kind of mobile phone ground plane also improves antenna bandwidth simultaneously to the influence of antenna gain multi-frequency mobile telephone antenna that reduces especially.
Background technology
Mobile phone is in order to reach requirement such as compact and attractive in appearance now, a kind of concealed antenna that is hidden in mobile phone inside and develop, and take the mobile phone inner space in order to allow antenna reduce, more thereby develop and a kind of concealed flat plane antenna, and flat plane antenna designs whether fine or notly, often determined the communication quality of mobile phone again.As shown in Figure 1, it is traditional a kind of inverted F type plane antenna 1, it is the cutting groove that forms a bending on a sheet metal 1, sheet metal is marked off one first antenna part 11 and one second antenna part 12, make first antenna part 11 become the low-frequency antenna that is applicable to the GSM900 system, second antenna part 12 then becomes the high frequency antenna that is applicable to the DCS1800 system.And on this sheet metal 1, be provided with signal load point 13 and the earth point 14 that is connected in order to circuit board in the mobile phone.And the characteristic by inverted F shaped antenna 1 learns that its frequency range and gain just are directly proportional with its size, and promptly size is big more, and then characteristic is good more, and when it was far away more apart from ground plane, its frequency range also can be big more.But mobile phone but is to make when inverted F type plane antenna 1 is applied in the mobile phone towards compact gradually trend now, suffers from the problem of frequency range deficiency.
Therefore, as shown in Figure 2, the way that the tradition another kind addresses the above problem, promptly be that a side at this inverted F type plane antenna 1 is provided with a parasitic antenna 2, and by second antenna part (being high frequency antenna) 12 of this this inverted F type plane antenna 1 of parasitic antenna 2 parasitic couplings, increasing the frequency of oscillation of second antenna part 12, and then increase the frequency range of this second antenna part 12, make it can be applicable to DCS1800 system and PCS1900 system simultaneously.The frequency range demand of having ignored low-frequency antenna but this kind method is just thought of high frequency antenna.
Summary of the invention
Therefore, purpose of the present invention is promptly providing a kind of mobile phone ground plane also improves antenna bandwidth simultaneously to the influence of antenna gain multi-frequency mobile telephone antenna that reduces.
So multi-frequency mobile telephone antenna of the present invention comprises a plate aerial, a plane loop antenna and a parasitic antenna.This plane loop antenna is adjacent with this plate aerial one side.This parasitic antenna and this plate aerial and plane loop antenna are adjacent, in order to this plate aerial of parasitic couplings.Whereby, can reach reduction mobile phone ground plane also improves antenna bandwidth simultaneously to the influence of antenna gain effect.
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 traditional inverted F type plane antenna organigram;
Fig. 2 is the organigram that traditional inverted F type plane antenna adds a parasitic antenna; And
Fig. 3 is the structural map of a preferred embodiment of mobile phone antenna of the present invention.
Element numbers
3 mobile phone antennas, 31 plate aerials
32 plane loop antennas, 33 parasitic antennas
311 signal load points, 321 signal load points
322 earth points, 331 earth points
Embodiment
Consulting shown in Figure 3ly, is a preferred embodiment of multi-frequency mobile telephone antenna of the present invention, and this multi-frequency mobile telephone antenna 3 comprises a coplanar plate aerial 31, a plane loop antenna 32 and a parasitic antenna 33.And in the design of antenna, general low frequency carrier signal signal (900MHz) is the induction wavelength during as resonance with quarter-wave (1/4 λ), and high-frequency carrier signal (1800MHz) then is the induction wavelength during as resonance with 1/2nd wavelength (1/2 λ).So, in the present embodiment, plate aerial 31 is traditional metal plate antennas (patch antenna), its shaped design becomes a strip and area equivalent in the quarter-wave of mobile phone carrier signal, therefore, plate aerial 31 is one to be applicable to the low-frequency antenna of GSM900 system, and is respectively equipped with a signal load point 311 and earth point 312 at the opposite end of plate aerial 31, in order to be connected with the circuit board and the ground plane (figure does not show) of mobile phone inside respectively.In addition, because the area equivalent of plate aerial 31 in the quarter-wave of carrier signal, therefore, can reduce the influence of the ground plane (not shown) of mobile phone to plate aerial 31 gains.
Plane loop antenna (loop antenna) 32 is provided in a side of a side and the contiguous plate aerial 31 of above-mentioned plate aerial 31, its shaped design becomes a rectangle and area equivalent in 1/2nd wavelength of mobile phone carrier signal, therefore, plane loop antenna 32 is one to be applicable to the high frequency antenna of DCS1800 system, and on plane loop antenna 32, be provided with a signal load point 321, in order to be connected with the circuit board (figure does not show) of mobile phone inside.And, can increase the frequency range of its high-frequency signals, and contain the high-frequency carrier signal of 1900MHz, so also be suitable for high frequency antenna as the PCS1900 system because plane loop antenna 32 has the architectural characteristic of loop antenna 32.
Parasitic antenna 33 is a metal plate in the present embodiment, it is located at and plate aerial 31 and plane loop antenna 32 adjacent positions, parasitic antenna 33 shapes also are designed to the quarter-wave that rectangle and its area are designed to be equivalent to the mobile phone carrier signal, therefore, when using parasitic antenna 33 these flat plane antennas 31 of parasitic couplings, can increase the frequency range of these plate aerial 31 reception carrier signals.In addition, this parasitic antenna 33 is provided with an earth point 331, in order to be connected with the circuit board and the ground plane (not shown) of mobile phone.
As shown in the above description, the present invention forms a multi-frequency mobile telephone antenna 3 by plate aerial 31, plane loop antenna 32 and parasitic antenna 33, and be the quarter-wave that is equivalent to the mobile phone carrier signal by area design with plate aerial 31, thereby reduction mobile phone ground plane is to the influence of plate aerial 31 gains, and by the loop antenna structure of plane loop antenna 32, make its receivable high-frequency signals frequency range greater than traditional inverted F type plane antenna, cover DCS1800 and PCS1900 system and its scope of application can be contained.In addition, by being used parasitic antenna 33 parasitic couplings plate aerials 31, and make its area design become to be equivalent to the quarter-wave of mobile phone carrier signal, the low-frequency signal frequency range that plate aerial 31 receives be can increase, and the goal of the invention and the effect of this case reached really.
In sum, multi-frequency mobile telephone antenna 3 of the present invention, mainly by a plate aerial 31, three parts such as one a plane loop antenna 32 and a parasitic antenna 33 are formed, and by being equivalent to the quarter-wave plate aerial 31 of carrier signal, reduce of the influence of mobile phone ground plane to plate aerial (low-frequency antenna) 31 gains, and the loop antenna structure of utilizing plane loop antenna 32, increase the high frequency response frequency range of plane loop antenna (high frequency antenna) 32, and by this plate aerial 31 of parasitic antenna 33 parasitic couplings and have the quarter-wave design of the carrier signal of being equivalent to, increase the LF-response frequency range of plate aerial 31.
The above person, only be the preferred embodiments of the present invention, when not limiting scope of the invention process with this, promptly the simple equivalent of being done according to claim of the present invention and description of the invention content generally changes and modifies, and all should still belong in the scope that patent of the present invention contains.
Claims (7)
1. multi-frequency mobile telephone antenna comprises:
One plate aerial, its shaped design become a strip and area equivalent in the quarter-wave of mobile phone carrier signal;
One becomes a rectangle and area equivalent in 1/2nd wavelength of mobile phone carrier signal with above-mentioned plate aerial one its shaped design of side adjacent planar type loop antenna; And
One parasitic antenna, itself and above-mentioned plate aerial and plane loop antenna are adjacent with this plate aerial of parasitic couplings, and its shaped design becomes rectangle and its area to be designed to be equivalent to the quarter-wave of mobile phone carrier signal.
2. multi-frequency mobile telephone antenna according to claim 1, wherein this plane loop antenna and this parasitic antenna are positioned at the same side of this plate aerial.
3. multi-frequency mobile telephone antenna according to claim 1, wherein this plate aerial is provided with a signal feed-in point and an earth point, in order to be connected with a circuit board and a ground plane of mobile phone.
4. multinomial according to claim 1 mobile phone antenna, wherein this plane loop antenna is provided with a signal feed-in point, in order to be connected with a circuit board of mobile phone.
5. multi-frequency mobile telephone antenna according to claim 1, wherein this parasitic antenna is provided with an earth point, in order to be connected with a circuit board and a ground plane of mobile phone.
6. multi-frequency mobile telephone antenna according to claim 1, wherein this plate aerial is a low-frequency antenna, this plane loop antenna is a high frequency antenna.
7. as mobile phone antenna as described in the claim 2, wherein this plate aerial is applicable to the GSM900 system, and this plane loop antenna is applicable to DCS1800 and PCS1900 system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02122405 CN1238926C (en) | 2002-06-04 | 2002-06-04 | Multi-frequency mobile telephone antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02122405 CN1238926C (en) | 2002-06-04 | 2002-06-04 | Multi-frequency mobile telephone antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1466241A CN1466241A (en) | 2004-01-07 |
| CN1238926C true CN1238926C (en) | 2006-01-25 |
Family
ID=34142234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02122405 Expired - Fee Related CN1238926C (en) | 2002-06-04 | 2002-06-04 | Multi-frequency mobile telephone antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1238926C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100399625C (en) * | 2004-05-14 | 2008-07-02 | 广达电脑股份有限公司 | Hidden type antenna |
| CN101299487B (en) * | 2007-05-01 | 2012-06-27 | 佛山市顺德区顺达电脑厂有限公司 | Antenna with radiation field type regulation component |
-
2002
- 2002-06-04 CN CN 02122405 patent/CN1238926C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1466241A (en) | 2004-01-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060125 Termination date: 20140604 |