CN100446342C - Wireless transmission apparatus and antenna structure thereof - Google Patents
Wireless transmission apparatus and antenna structure thereof Download PDFInfo
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- CN100446342C CN100446342C CNB2004100563686A CN200410056368A CN100446342C CN 100446342 C CN100446342 C CN 100446342C CN B2004100563686 A CNB2004100563686 A CN B2004100563686A CN 200410056368 A CN200410056368 A CN 200410056368A CN 100446342 C CN100446342 C CN 100446342C
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- conductive shell
- antenna structure
- electrical junction
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Abstract
The present invention relates to a wireless transmission apparatus and an antenna structure thereof, which comprises a circuit board, a conductive shell body, a first electrical connection part and a second electrical connection part, wherein the circuit board has a feed-in end and a ground connection end, and the conductive shell body surrounds the periphery of the circuit board; the first electrical connection part is electrically connected with the feed-in end and the conductive shell body and is perpendicular to the surface of the circuit board; in addition, the second electrical connection part is electrically connected with the ground connection end and the conductive shell body and is perpendicular to the surface of the circuit board.
Description
Technical field
The relevant a kind of antenna structure of the present invention and a kind of radio transmitting device that adopts antenna structure.
Background technology
Along with the exhibition of breaking out of meeting of wireless telecommunications, and because many communication products all are tending towards miniaturization, therefore some embedded antennas arise at the historic moment, and more general at present employed miniature antenna has antenna component (chip antenna) and planar antenna (planar antenna) etc.Generally speaking, the antenna of above-mentioned these types all has the little characteristics of volume, the antenna of ceramic core (ceramic chip antenna) of wherein common antenna component as adopting common burning porcelain technology (LTCC) to make, and the planar antenna design also has a lot, microstrip antenna (microstripeantenna) for example, printing type aerial (printed antenna) and planar inverted F-shape antenna (Planar Inverted FAntenna, PIFA) or the like, these antenna widely is applied to GSM, DCS, UMTS, wireless terminal device such as WLAN and blue bud, for example mobile phone, wireless local area network card or the like.
At first see also Fig. 1 a, 1b, with the radio transmitting device 10 that has existing planar inverted F-shape antenna in one is example, it mainly is made up of a plastic casing C and the circuit board 20 that is positioned at plastic casing C inside, above-mentioned planar inverted F-shape antenna (PIFA) is to be arranged on the circuit board 20, in order to emission and receiving electromagnetic signals.Wherein, the circuit board 20 with existing planar inverted F-shape antenna structure is shown in Fig. 2 a and 2b, and circuit board 20 mainly is made up of a substrate 200, a feed pin 201, a short circuit pin 202, a strip metal 203 and a grounded metal G.As shown in the figure, strip metal 203 has an open end 2030 and a short-circuit end 2031, wherein short circuit pin 202 is to be positioned at short-circuit end 2031 places, and electrically connecting strip metal 203 and grounded metal G, feed pin 201 then extends out to a match circuit (not shown) by strip metal 203 centre positions.
Particularly, above-mentioned feed pin 201 is not link to each other to avoid short circuit mutually with aforementioned grounded metal G.Generally speaking, the distance of 2031 of aforementioned open end 2030 and short-circuit ends is the rough quarter-wave that equals.Yet, owing to the metal part (feed pin 201, short circuit pin 202, strip metal 203 and grounded metal G) in the existing planar inverted F-shape antenna structure is to adopt the surface that printed circuit is distributed in substrate 10 more, therefore its only can be beneficial to and to receive the plane polarization signal be main, yet unsatisfactory for the electromagnetic signal reception of tool perpendicular polarization characteristic.
Summary of the invention
Because the shortcoming of aforementioned existing planar antenna structure the purpose of this invention is to provide a kind of antenna structure that can improve effectively for perpendicular polarization signal reception and aesthetic.
Antenna structure of the present invention comprises a circuit board, a conductive shell, one first electrical junction and one second electrical junction.Described circuit board has a feed side and an earth terminal, and conductive shell is surrounded on the circuit board periphery.Wherein, first electrical junction electrically connects described feed side and conductive shell, and described first electrical junction is perpendicular to this circuit board surface.Second electrical junction electrically connects described earth terminal and conductive shell, and second electrical junction is perpendicular to circuit board surface.
In the foregoing antenna structure, described conductive shell has an opening and a central shaft, and conductive shell is to extend towards central axis direction, and central shaft passes aforementioned opening.
In a preferred embodiment, described circuit board is to be parallel to central shaft.
In a preferred embodiment, described first, second electrical junction is perpendicular to the conductive shell surface.
In a preferred embodiment, described opening is rectangular.
In the foregoing antenna structure, conductive shell is to be made by metal material.
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, preferred embodiment cited below particularly and conjunction with figs. are elaborated.
Description of drawings
Fig. 1 a is the schematic diagram that the existing circuit board with planar antenna structure of expression is positioned at a plastic casing;
Fig. 1 b is the partial schematic diagram of circuit board 20 among the presentation graphs 1a;
Fig. 2 a is the schematic diagram of antenna structure among expression the present invention;
Fig. 2 b is the end view of X1 direction among the presentation graphs 2a.
Embodiment
See also Fig. 2 a and Fig. 2 b, wherein Fig. 2 b is the end view of expression by X1 direction among Fig. 2 a.Shown in Fig. 2 a, antenna structure of the present invention mainly is made up of a conductive shell C, a circuit board P, one first electrical junction A1 and one second electrical junction A2, wherein circuit board P comprises general signal processing circuit and radio reception and radiating circuit, can be widely used in unlimited transmitting device, for example mobile phone, a wireless local area network card or the like whereby.In the present invention, above-mentioned conductive shell C is the hollow structure that is a strip, and extend along the central shaft directions X, wherein conductive shell C is formed by being surrounded on circuit board P dull and stereotyped C1, C2, C3 and C4 on every side, and forming a rectangular aperture C0, circuit board P is arranged at conductive shell C inside with the attitude that is parallel to above-mentioned central shaft X in addition.
Particularly, the present invention mainly is by forming three-dimensional antenna structure in conjunction with aforementioned circuit plate P and peripheral conductive shell C, is that the first electrical junction A1 and the second electrical junction A2 that sees through strip electrically conducts between wherein above-mentioned conductive shell C and the circuit board P.Shown in Fig. 2 a, 2b, first, second electrical junction A1, A2 are perpendicular to the surface of aforementioned circuit plate P and dull and stereotyped C1 in present embodiment, the first electrical junction A1 connects a feed side F (feed point) who is positioned on the circuit board P again, the second electrical junction A2 then electrically connects an earth terminal G who is positioned on the circuit board P, and wherein the feed side F on the circuit board P is not link to each other mutually to avoid be short-circuited (shown in Fig. 2 a) with earth terminal G.
See also Fig. 2 b again, (direction as shown by arrows) of looking along the X1 direction by open C 0 place, form three-dimensional antenna structure by upwardly extending first, second electrical junction of circuit board P A1, A2 and the conductive shell C of position, can provide better usefulness compared to existing planar antenna in circuit board P periphery.Wherein, can suitably design the length of conductive shell C on the central shaft directions X, be beneficial to receive the signal of different frequency (that is different wave length).In addition, because first, second electrical junction A1, A2 are the attitudes that is perpendicular to circuit board P surface among the present invention, therefore can overcome existing planar antenna effectively for the not good shortcoming of perpendicular polarization signal reception.
In sum, the invention provides a kind of radio transmitting device, see through first, second electrical junction A1, A2 and electrically connect the conductive shell C that a circuit board P and is surrounded on circuit board P periphery, can promote the usefulness of antenna significantly.In addition, owing to can use metal material as conductive shell C among the present invention, adopt the housing of plastic insulation material not only to have more texture compared to general radio transmitting device, and preferable structural strength can be provided, and can be widely used in as among the unlimited transmitting device such as mobile phone, wireless local area network card.
Though the present invention discloses as above with preferred embodiment; yet it is not in order to limit scope of the present invention; any person skilled in the art person; without departing from the spirit and scope of the present invention; when the variation that can make all equivalences or replacement, so protection scope of the present invention is when looking being as the criterion that the accompanying Claim scope defined.
Claims (6)
1. antenna structure comprises:
One circuit board has a feed side and an earth terminal;
One conductive shell is surrounded on this circuit board periphery, and this conductive shell extends towards a central axis direction, and wherein the length of this conductive shell on this central axis direction determines the frequency of acceptable signal, and this circuit board is parallel to described central shaft;
One first electrical junction electrically connects this feed side and this conductive shell, and wherein this first electrical junction is perpendicular to this circuit board surface;
One second electrical junction electrically connects this earth terminal and this conductive shell, and wherein this second electrical junction is perpendicular to this circuit board surface.
2. antenna structure as claimed in claim 1 is characterized in that this conductive shell has an opening, and this central shaft passes this opening.
3. antenna structure as claimed in claim 1 is characterized in that the surface of this first, second electrical junction perpendicular to this conductive shell.
4. antenna structure as claimed in claim 1 is characterized in that this conductive shell is to be made by metal material.
5. antenna structure as claimed in claim 2 is characterized in that this opening is rectangular.
6. a radio transmitting device is characterized in that comprising antenna structure as claimed in claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100563686A CN100446342C (en) | 2004-08-03 | 2004-08-03 | Wireless transmission apparatus and antenna structure thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100563686A CN100446342C (en) | 2004-08-03 | 2004-08-03 | Wireless transmission apparatus and antenna structure thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1734838A CN1734838A (en) | 2006-02-15 |
| CN100446342C true CN100446342C (en) | 2008-12-24 |
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ID=36077108
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100563686A Active CN100446342C (en) | 2004-08-03 | 2004-08-03 | Wireless transmission apparatus and antenna structure thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN100446342C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102437406A (en) * | 2010-08-25 | 2012-05-02 | 长盛科技股份有限公司 | Antenna structure |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4975711A (en) * | 1988-08-31 | 1990-12-04 | Samsung Electronic Co., Ltd. | Slot antenna device for portable radiophone |
| US5394160A (en) * | 1991-09-04 | 1995-02-28 | Nec Corporation | Portable radio with coplanar ground and atenna conductive films formed on the inner surface of the case |
| CN1231778A (en) * | 1996-09-25 | 1999-10-13 | 艾利森公司 | Shielded antenna connector |
| US6392603B1 (en) * | 1999-10-29 | 2002-05-21 | Telefonaktiebolaget Lm Ericsson (Publ) | Module antenna device |
-
2004
- 2004-08-03 CN CNB2004100563686A patent/CN100446342C/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4975711A (en) * | 1988-08-31 | 1990-12-04 | Samsung Electronic Co., Ltd. | Slot antenna device for portable radiophone |
| US5394160A (en) * | 1991-09-04 | 1995-02-28 | Nec Corporation | Portable radio with coplanar ground and atenna conductive films formed on the inner surface of the case |
| CN1231778A (en) * | 1996-09-25 | 1999-10-13 | 艾利森公司 | Shielded antenna connector |
| US6392603B1 (en) * | 1999-10-29 | 2002-05-21 | Telefonaktiebolaget Lm Ericsson (Publ) | Module antenna device |
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| Publication number | Publication date |
|---|---|
| CN1734838A (en) | 2006-02-15 |
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