CN100416916C

CN100416916C - Antenna of ceramic core

Info

Publication number: CN100416916C
Application number: CNB2004101029075A
Authority: CN
Inventors: 黄玉慧; 方靖淑
Original assignee: Ciwei Comm Co ltd
Current assignee: Ciwei Comm Co ltd
Priority date: 2004-12-28
Filing date: 2004-12-28
Publication date: 2008-09-03
Anticipated expiration: 2024-12-28
Also published as: CN1797846A

Abstract

The present invention relates to a ceramic chip antenna which comprises a base body and a conductor, wherein the conductor is whole covered and is circularly arranged on the surface of the base body, or the conductor partially penetrates through the inner part of the base body. The conductor is a metal conductor which has a high Q value and good oxidation resistance performance. Through micro-shadow etching or printing technique, the conductor is whole covers and is circularly arranged on the surface of the dielectric ceramic base body with low loss and high dielectric coefficients after sintering in a zigzag or a spiral mode, or the partial metal conductor penetrates through the inner part of the dielectric ceramic base body. Thereby, the line structure is formed, and the present invention solves the problems of narrow frequency width, low efficiency, deficient trimmability, etc.

Description

Antenna of ceramic core

Technical field

The present invention relates to a kind of antenna of ceramic core, particularly a kind of have a high efficiency small-sized laminated ceramic antenna, and described antenna has and improves low radiation efficiency and can finely tune coupling fast to be used on electronic article and the WLAN (WLAN) etc.

Background technology

In the prior art, present employed electronic article such as mobile phone, PDA, GPS or WLAN (WLAN) all are to carry out signal transmission or reception by miniature antenna, the design of antenna and making will directly influence transmission and the receptivity of electronic article or WLAN, so good design and manufacture method will improve the transmission and the receptivity of miniature antenna.

A kind of technical scheme of prior art designs for single face for the antenna conductor that forms on ceramic substrate.

The middle another kind of technical scheme of prior art is bent for the conductor exposed portions serve of the antenna conductor that do not overlap with the dielectric chip surface along the dielectric chip, to improve frequency range.

The another kind of technical scheme of prior art is that antenna component can combine with the power supply terminal of external bearer substrate, to adjust coupling and to improve frequency range.

Another technical scheme of prior art is for to be formed with a spiral conductor part, in order to receive the electric wave of plural frequency on matrix.

In above-mentioned prior art, to all reduce the radiation efficiency of antenna behind the antenna miniaturization, also do not possess on the process can be with the flexibility of design alteration manufacturing, so finalized the design when producing at product, lose the elasticity of fine setting, cause it can't satisfy applied environment miscellaneous.And the employed laminated ceramic of antenna easily shrinks and distortion when sintering is made, and causes productivity ratio to reduce.

Summary of the invention

Main purpose of the present invention is to solve above-mentioned problems of the prior art, and then provide a kind of structure and the simple small size antenna of manufacturing process, described antenna can improve the low radiation efficiency and the fine setting property of miniaturization laminated ceramic antenna, and it is more easy to have an operation, cheap but high efficiency performance.

For realizing above-mentioned purpose of the present invention, can be used on electronic article and the WLAN, comprising: matrix and conductor.Matrix is a slim body, and its two free end respectively has a corresponding depressed part; Conductor loops is around being covered on the described matrix, and forms two conducting end at described two depressed parts, and forms the line construction that covers described matrix surface and be connected with described two conducting end between described two conducting end; Described line construction forms a radiation area and a signal feed side; The circuit of described radiation area and described signal feed side all forms a plurality of I font line segments in the bottom surface of described matrix; And at described matrix end face, the circuit of described radiation area forms both sides and has a plurality of ㄇ font line segments, and the circuit of described signal feed side forms a plurality of inclination I font line segments.

Antenna of ceramic core of the present invention adopts the metallic conductor with high Q value and good oxidation resistance, all be located at through oversintering described metallic conductor and have on the dielectric ceramic matrix surface of low loss and high-dielectric coefficient by lithography or printing technology with complications or spiral way cover ring, perhaps the described metallic conductor of part passes described dielectric ceramic matrix inside to form line construction, and the existing frequency range of the middle-size and small-size antenna of prior art is narrow to improve, the low problems such as lacking trimmability that reaches of efficient.

Brief description of drawings

Fig. 1 is an antenna of ceramic core schematic surface of the present invention;

Fig. 2 is an antenna of ceramic core side schematic view of the present invention;

Fig. 3 is an antenna of ceramic core schematic bottom view of the present invention;

Fig. 4 is an antenna of ceramic core surface coverage layer protecting film schematic diagram of the present invention;

Fig. 5 is another embodiment schematic diagram of antenna of ceramic core of the present invention.

In the accompanying drawing, the list of parts of each label representative is as follows:

1-matrix 23-radiation area

11,11 '-depressed part 24-signal feed side

2-conductor 3-diaphragm

21,21 '-conducting end 24a, 24b-line segment

The 22-line construction

231,231 ', 24c-I font line segment 232-ㄇ font line segment

24a, 241-inclination I font line segment 24b-column line segment

Embodiment

Below in conjunction with accompanying drawing specific embodiments of the present invention is made detailed description.

Fig. 1, Fig. 2 and Fig. 3 are antenna of ceramic core of the present invention surface, side and schematic bottom view.As shown in the figure, antenna of ceramic core of the present invention comprises matrix 1 and is coated on described matrix 1 lip-deep conductor 2, constituting a high efficiency and can be, and be used for producing fast the electronic article (as mobile phone, PDA, GPS and WLAN (WLAN) etc.) of exploitation by the small size antenna of fast fine setting coupling.

Described matrix 1 is to use by low loss, high-dielectric coefficient and the slim body made through the dielectric ceramic material that oversintering is finished, on the matrix 1 two free ends respectively have a corresponding sunk part 11,11 ';

Conductor 2 is for to have the metallic conductor of high Q value and good oxidation resistance, and utilizes lithography or printing technology that the metallic conductor cover ring is around on the surface of matrix 1.Conductor 2 sunk part 11,11 ' on form two conducting

end

21,21 be connected with circuit board ', two conducting end 21,21 ' on be connected with the line construction 22 of being located at matrix 1 surface with complications or spiral way cover ring, line construction 22 forms a radiation area 23 and signal feed sides 24.

As shown in Figure 3, the circuit of radiation area 23 and signal feed side 24 all form in the bottom surface of matrix 1 a plurality of I font line segments 231,231 '; And at matrix 1 end face, the circuit of radiation area 23 forms both sides and has a plurality of ㄇ font line segments 232, and the circuit of signal feed side 24 forms 241 (as shown in Figure 1) of a plurality of inclination I font line segment.

In the embodiment depicted in fig. 1, the I font line segment of inclination I font line segment and the signal feed side surface of twining matrix 1 in a spiral manner.

Because above-mentioned conductor 2 is for having the metallic conductor of high Q value and good oxidation resistance, and the line construction 22 of complications or spiral is coated on dielectric ceramic matrix 1 surface with low loss and high-dielectric coefficient, can improve therefore that frequency range is narrow, efficient reduces and problem such as shortage trimmability.

Simultaneously,, can change the inductance value size, realize the electronic article that fine setting is fast arranged in pairs or groups and used with coupling by adjusting the line width and the number of turns of signal feed side 24.

Fig. 4 is the schematic diagram of antenna of ceramic core surface coverage layer protecting film of the present invention.As shown in the figure; antenna of ceramic core of the present invention mainly covers layer protecting film 3 on matrix 1 and conductor 2 surfaces; diaphragm 3 is a medium overlay film; by dielectric property and the pattern dimension size of adjusting this medium overlay film, can allocate the resonance frequency of antenna and play the effect of protection circuit structure 22.

Fig. 5 is another embodiment schematic diagram of antenna of ceramic core of the present invention.As shown in the figure, present embodiment and above-mentioned Fig. 1, Fig. 2 and embodiment shown in Figure 3 are roughly the same, difference is in and also comprises one section column line segment 24b that runs through matrix 1 inside in signal feed side 24, the I font line segment 24c of the inclination I font line segment 24a and the signal feed side 24 of matrix 1 bottom surface is connected 24b by the column line segment and connects, thereby forms the signal feed side 24 of a stereochemical structure.

Simultaneously, the inclination I font line segment 24a of signal feed side 24 can be not wide or wide spiral winding mode, can adjust the inductance value of signal feed side 24 thus, uses and adjusts or the control antenna inductance value, to meet the demand of different electronic article characteristics.

Further, above-mentioned antenna of ceramic core is adjusted the inductance value by not wide or wide spiral winding mode except inclination I font line segment 24a, the I font line segment 24c that can utilize signal feed side 24, can also adjust inductance value by changing the circuit number of turns of being twined signal feed side 24.

Below only being the explanation to the preferred embodiment of the present invention, is not to be used for limiting the scope of the present invention.Under situation about not departing from the scope of the present invention with spirit, various variations and the modification done all should be encompassed in the claim of the present invention institute restricted portion.

Claims

1. an antenna of ceramic core can be used on electronic article and the WLAN, comprising:

One matrix is a slim body, and its two free end respectively has a corresponding depressed part;

One conductor around being covered on the described matrix, and forms two conducting end at described two depressed parts, and forms the line construction that covers described matrix surface and be connected with described two conducting end between described two conducting end; Described line construction forms a radiation area and a signal feed side; The circuit of described radiation area and described signal feed side all forms a plurality of I font line segments in the bottom surface of described matrix; And at described matrix end face, the circuit of described radiation area forms both sides and has a plurality of ㄇ font line segments, and the circuit of described signal feed side forms a plurality of inclination I font line segments.

2. antenna of ceramic core as claimed in claim 1 is characterized in that, the surface that the I font line segment of described inclination I font line segment and described signal feed side twines described matrix in a spiral manner.

3. antenna of ceramic core as claimed in claim 1, it is characterized in that, the line construction of described signal feed side also comprises the column line segment that runs through described matrix inside, and the I font line segment of described inclination I font line segment and described signal feed side is connected by described column line segment.

4. as claim 1 or 2 or 3 described antenna of ceramic core, it is characterized in that, also comprise the diaphragm that is covered in described matrix and described conductive surface.