CN1713448A - Antenna device - Google Patents
Antenna device Download PDFInfo
- Publication number
- CN1713448A CN1713448A CN 200410059818 CN200410059818A CN1713448A CN 1713448 A CN1713448 A CN 1713448A CN 200410059818 CN200410059818 CN 200410059818 CN 200410059818 A CN200410059818 A CN 200410059818A CN 1713448 A CN1713448 A CN 1713448A
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- China
- Prior art keywords
- antenna
- circuit board
- mobile communication
- antenna assembly
- communication unit
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Abstract
The mobile communication unit has a circuit board whose surface a signal processing circuit is set to process wireless signal. The antenna unit consists of antenna body, metal feed line and ground metal layer. The antenna body is set beside the mobile communication unit. The metal feed line is made on the surface of circuit board, and one end of it is connected with antenna body and another end of it is fed back to signal processing circuit through circuit board. The ground metal layer is set at the bottom side of circuit board. When wireless signal is transmitted, the metal feed line accesses the signal processing circuit through circuit board to make current evenly distribute on the ground metal layer and to make antennal unit generate full direction radiation field.
Description
Technical field:
The invention relates to a kind of antenna assembly, particularly a kind of antenna assembly that is used on the mobile communication unit.
Background technology:
Along with advancing by leaps and bounds of wireless communication technique, also like the mushrooms after rain the appearance of various communication product and technology, double frequency module, three frequency modules or even module application in recent years the trend especially of multiband more.A product is accepted with sure widely if want to obtain the consumer, the usefulness of its product, outward appearance, size, just become very important key, and communication product is except the consideration of product itself, most important no more than being the transmitting-receiving usefulness of signal, because the transmitting-receiving usefulness of signal, the ratio of in consumer evaluation's proportion, occupying very big some for product, and it is the most directly related with signal receiving/transmission usefulness, no more than the antenna assembly on the product, take into account the transmitting-receiving usefulness of antenna simultaneously and cooperate the globality of communication product to consider, become industry concerted effort target.
Yet, mobile phone products of a great variety, with the folding type mobile phone is example, the modal helical antenna that just belongs to of the antenna of its collocation, when mobile phone uses helical antenna, antenna has some problems to produce in high-frequency operation often, as shown in Figure 1, when antenna assembly 10 is arranged at mobile phone one side, its load point 16 is the edges at circuit board of mobile phone 24, the feed-in mode then is connected to antenna contacts 20 by a metal feeder 18, relends by feed-in sheet metal or connector and is connected to antenna contacts 20 (as the antenna terminal seat 14 of Fig. 1).
Adopt the mobile phone of this type antenna, in the DCS frequency band (during the operation of 1710MHz～1880MHz), because the surface current skewness of ground plane 22 causes radiation pattern to subside.As shown in Figure 2, simulation radiation pattern figure when operating in 1800MHz for the antenna assembly of Fig. 1, by on the figure as can be known, the antenna problem that positive y direction of principal axis has field pattern to subside on the y-z plane, a little less than making this direction signal strength, cause the dead angle of reception, this will make that also the receiving and transmitting signal ability in mobile phone left side is relatively poor, and then influence the usefulness of the whole receiving and transmitting signal of product.
Therefore,, the invention provides a kind of design of antenna assembly, effectively solve the problem of antenna, and then strengthen the ability of the receiving and transmitting signal of mobile phone in high-frequency transmission frequency band field pattern inequality for improving this problem.
Summary of the invention:
The purpose of this invention is to provide a kind of design of antenna assembly,, make antenna assembly when high-frequency transmission, have preferred radiation characteristic by the structure of metal feeder by the feed-in of circuit board central authorities.
The invention provides a kind of antenna assembly, be applicable to the wireless signal transmitting-receiving of mobile communication unit (the present invention is to be example with the mobile phone), this mobile phone has a circuit board, its upper surface is laid with a signal processing circuit in order to handle wireless signal, and this antenna assembly comprises: spiral body, metal feeder and ground metal layer.The spiral body is to be located on the side of circuit board of this mobile phone, and in order to the transmitting/receiving wireless signal, this spiral body also comprises an antenna terminal seat.Metal feeder is the upper surface that is made in this circuit board, and the one end is to be connected with this antenna terminal seat, and the other end of metal feeder then is side central authorities this signal processing circuit of feed-in by this circuit board.
Ground metal layer is the lower surface that is laid in this circuit board.When mobile phone when carrying out transmission of wireless signals, because the metal feeder of this antenna assembly is this signal processing circuit of central feed-in by this circuit board, make the surface of this ground metal layer produce equally distributed electric current, and make this antenna assembly produce isotropic radiation pattern.
Description of drawings:
By following detailed description in conjunction with the accompanying drawings, can understand the plurality of advantages of foregoing and the present invention easily, wherein:
Fig. 1 is in the conventional art, and antenna assembly is positioned at the relative position schematic diagram of mobile phone one side;
Fig. 2 is for operating in the radiation pattern key diagram of 1800MHz according to the antenna assembly of the 1st figure;
Fig. 3 is the relative position schematic diagram of antenna assembly and mobile phone according to the preferred embodiment of the invention;
Fig. 4 is for operating in the radiation pattern key diagram of 1800MHz according to the antenna assembly of Fig. 3;
Fig. 5 be according to the preferred embodiment of the invention antenna assembly about the analog result of frequency-reflected umpedance; And
Fig. 6 a～Fig. 6 d is the explanation schematic diagram of other embodiment of the present invention.
The figure number table of comparisons:
10,30 antenna assemblies, 12,32 antenna bodies
14,34 antenna terminal seats, 16,36 load points
18,38 metal feeders, 20,40 antenna contacts
22 ground planes, 24 circuit boards
32 antenna bodies, 42 ground metal layer
44 circuit boards
441 upper surfaces
442 lower surfaces
Embodiment:
The invention provides a kind of antenna assembly, particularly a kind of antenna assembly that is used on the mobile communication unit.In the present invention, be connected in the feed-in position of the metal feeder of antenna body and signal processing circuit by change, make antenna when high-frequency operation, have preferred radiation pattern.Below enumerate a preferred embodiment with explanation the present invention, yet this only is one for example, and is not in order to limit invention itself.The detailed description of relevant this preferred embodiment is as follows.
Please refer to shown in Figure 3ly, is the relative position schematic diagram of antenna assembly and mobile phone according to the preferred embodiment of the invention, and mobile communication of the present invention unit (the present invention be example with the folding type mobile phone) is to have an antenna assembly 30 and a circuit board 44.Wherein the upper surface 441 of circuit board 44 is to be laid with a signal processing circuit (not shown), in order to handle the wireless signal that is received; 30 of this antenna assemblies comprise: an antenna body 32, a metal feeder 38 and a ground metal layer 42.Antenna body 32 is to be fixed on the side of circuit board 44 of this mobile phone, and in order to the transmitting/receiving wireless signal, this antenna body 32 also comprises an antenna terminal seat 34.
Metal feeder 38 is the upper surfaces 441 that are made in this circuit board 44, can be printed on simultaneously on this circuit board 44 with the circuit (circuitry) on the circuit board 44.Wherein an end of metal feeder 38 is to see through an antenna contacts 40 to be connected with this antenna terminal seat 34, and its other end then is that side central authorities by this circuit board 44 are by a load point 36 FD feed treatment circuits.It should be noted, adjust the feed-in position of metal feeder 38, may influence the resonance frequency of antenna, its length is according to the operational frequency bands of antenna and restriction to some extent, that is to say that the equivalent length of integrated antenna (comprising parts such as antenna body 32, antenna terminal seat 34, metal feeder 38) needs 1/4th of match operation band wavelength.In addition, antenna body 32 is to be example with the helical antenna in the present embodiment, is not in order to limit the present invention.
In addition, ground metal layer 42 is the lower surfaces 442 that are laid in this circuit board 44.Therefore, when mobile phone when carrying out transmission of wireless signals, because the metal feeder 38 of this antenna assembly 30 is these signal processing circuits of central feed-in by this circuit board 44, make the surface of ground metal layer 42 can produce equally distributed electric current, and make antenna assembly 30 produce isotropic radiation pattern.Please also refer to Fig. 4, it is the radiation pattern key diagram that operates in 1800MHz according to the antenna assembly of Fig. 3, and wherein the primary clustering sizing specification of antenna is as follows: the radius of antenna body 32 (helical antenna) with highly be respectively 3mm and 5.5mm; Circuit board 44 is of a size of 80 * 40 * 2mm3; Antenna terminal seat 34 is the metallic copper post of 3mm.As seen from the figure, when the metal feeder 38 of antenna after middle feed-in, the dead angle of reception on the y-z plane originally disappears, antenna is similar to isotropic field pattern under this frequency of operation, have preferred radiation characteristic.
Please refer to Fig. 5, be that antenna assembly 30 according to the present invention is in the analog result of frequency-reflected umpedance, it is the length that sees through control metal feeder 38, makes antenna assembly 30 of the present invention still can be maintained at GSM and DCS band system band (GSM:880MHz～960MHz; The normal use of DCS:1710MHz～1880MHz).In addition, shown in figure 6a～Fig. 6 d, be explanation schematic diagram for other embodiment of the present invention, wherein the metal feeder 38 of Fig. 6 a, Fig. 6 b, Fig. 6 d is to have more than one 90 degree knuckles, but, the length restriction of metal feeder 38 still need meet the operation of institute desire band wavelength 1/4th.
The design of antenna assembly of the present invention has following advantage, comprising:
(1) needn't change the primary clustering (comprising the appearance design of mobile communication whole unit) of antenna assembly, can improve former when transmitting prior to high frequency band, the problem that the aerial radiation field pattern that is produced subsides.
(2) be connected in the feed-in position of the metal feeder of antenna body and signal processing circuit by change, make antenna when high-frequency operation, have, promote the signal transmission efficiency of antenna near isotropic radiation pattern.
Though the present invention illustrates as above with preferred embodiment, so it is not only to terminate in the foregoing description in order to limit the present invention's spirit with the invention entity.The modification of being done in not breaking away from spirit of the present invention and scope all should comprise within the scope of the invention.
Claims (10)
1. an antenna assembly is applicable to the wireless signal transmitting-receiving of a mobile communication unit, and described mobile communication unit has a circuit board, and its upper surface is laid with a signal processing circuit in order to handle wireless signal, and described antenna assembly comprises at least:
One antenna body is located at a side of described mobile communication unit, in order to the transmitting/receiving wireless signal;
One metal feeder is made in the upper surface of described circuit board, and the one end is connected with described antenna body, and its other end then is the described signal processing circuit of side central authorities' feed-in by described circuit board; And
One ground metal layer is laid in the lower surface of described circuit board;
When described mobile communication unit when carrying out transmission of wireless signals, because the metal feeder of described antenna assembly is the described signal processing circuit of side central authorities' feed-in by described circuit board, make the surface of described ground metal layer produce equally distributed electric current, and make described antenna assembly produce isotropic radiation pattern.
2. antenna assembly as claimed in claim 1, wherein said antenna body are helical antennas.
3. antenna assembly as claimed in claim 2, wherein said helical antenna also comprise an antenna terminal seat, in order to connect described spiral body and described metal feeder.
4. antenna assembly as claimed in claim 1, wherein said mobile communication unit is a mobile phone.
5. antenna assembly as claimed in claim 1, wherein said metal feeder have more than one 90 degree knuckles.
6. mobile communication unit comprises:
One circuit board;
One signal processing circuit is laid in the upper surface of described circuit board; And
One antenna assembly, in order to the transmitting/receiving wireless signal, wherein said antenna assembly also comprises:
One antenna body is located at a side of described mobile communication unit, in order to the transmitting/receiving wireless signal;
One metal feeder is made in the upper surface of described circuit board, and the one end is connected with described antenna body, and its other end then is the described signal processing circuit of side central authorities' feed-in by described circuit board; And
One ground metal layer is laid in the lower surface of described circuit board;
When described mobile communication unit when carrying out transmission of wireless signals, because the metal feeder of described antenna assembly is the described signal processing circuit of side central authorities' feed-in by described circuit board, make the surface of described ground metal layer produce equally distributed electric current, and make described antenna assembly produce isotropic radiation pattern.
7. mobile communication as claimed in claim 6 unit, wherein said antenna body are helical antennas.
8. mobile communication as claimed in claim 7 unit, wherein said helical antenna also comprise an antenna terminal seat, in order to connect described helical antenna and described metal feeder.
9. mobile communication as claimed in claim 6 unit, wherein said mobile communication unit is a mobile phone.
10. mobile communication as claimed in claim 6 unit, wherein said metal feeder have more than one 90 degree knuckles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100598187A CN100397703C (en) | 2004-06-22 | 2004-06-22 | Antenna device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100598187A CN100397703C (en) | 2004-06-22 | 2004-06-22 | Antenna device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1713448A true CN1713448A (en) | 2005-12-28 |
| CN100397703C CN100397703C (en) | 2008-06-25 |
Family
ID=35718949
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100598187A Expired - Fee Related CN100397703C (en) | 2004-06-22 | 2004-06-22 | Antenna device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100397703C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101997564A (en) * | 2009-08-27 | 2011-03-30 | 雷凌科技股份有限公司 | Multi-antenna communication apparatus |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3259411B2 (en) * | 1992-09-21 | 2002-02-25 | 松下電器産業株式会社 | Mobile radio antenna |
| US6342856B1 (en) * | 1998-01-13 | 2002-01-29 | Mitsumi Electric Co., Ltd. | Method of feeding flat antenna, and flat antenna |
| JP2001077611A (en) * | 1999-09-06 | 2001-03-23 | Tdk Corp | Movable object communication machine |
| JP3642029B2 (en) * | 2001-02-06 | 2005-04-27 | 日本電気株式会社 | Mobile phone |
| JP3664666B2 (en) * | 2001-06-05 | 2005-06-29 | 三星電子株式会社 | Portable terminal |
| JP3798733B2 (en) * | 2001-06-13 | 2006-07-19 | 株式会社東芝 | Wireless module and wireless communication terminal provided with the wireless module |
-
2004
- 2004-06-22 CN CNB2004100598187A patent/CN100397703C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101997564A (en) * | 2009-08-27 | 2011-03-30 | 雷凌科技股份有限公司 | Multi-antenna communication apparatus |
| CN101997564B (en) * | 2009-08-27 | 2013-07-24 | 雷凌科技股份有限公司 | Multi-antenna communication apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100397703C (en) | 2008-06-25 |
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| 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: 20080625 |