CN2821892Y

CN2821892Y - Antenna

Info

Publication number: CN2821892Y
Application number: CN 200520028400
Authority: CN
Inventors: 锺永荣
Original assignee: Peng Chengxuan
Current assignee: Peng Chengxuan
Priority date: 2005-03-21
Filing date: 2005-03-21
Publication date: 2006-09-27
Anticipated expiration: 2015-03-21

Abstract

The utility model discloses a kind of antenna, it is meant a kind of antenna for mobile phone, it is at little band metal wire of a body surface coating, this little band metal wire around and in the shape of a spiral shape be arranged at body surface, this body is made up of dielectric material, in the time of body end face coating metal, be connected with little band metal wire, the length of this little band metal wire and width and the number of turns and angle are by the characteristic decision of electromagenetic wave radiation, and be connected with wiring board with the body end face, make this wiring board can become the transmission line of 50 ohm or 75 ohm because of the radio frequency transmission characteristics design.

Description

A kind of antenna

Technical field

The utility model relates to a kind of antenna, particularly a kind ofly has that volume is little, a steady quality, antenna for mobile phone that cost is low.

Background technology

General common antenna for mobile phone 1, as shown in Figure 1, be by metal wire 11 coileds, be installed on the threaded spiral shell seat 12 of an other end car, and utilize the plastic cement shoot mode that metal wire 11 is fixing, each gap between screw is maintained a certain distance, to guarantee electromagnetic stability, the plastic cement overcoat is added in threaded line outside behind the ejection formation simultaneously, with the color of matching with mobile phone and give baking vanish to increase the consistency of outward appearance, because the dielectric coefficient of plastic material is between 2～4, be for 1 with respect to the dielectric coefficient of air, if the antenna that aerial antenna ratio is imbedded at plastic cement, its length dimension need be increased between 1～2 times, so the design of commonly using antenna for mobile phone is principle all according to this, overall dimension can be dwindled, and just moulding is different.

Because the annual quantity of producing of mobile phone is unit with hundred million at present, the demand of antenna is big as the quantity of mobile phone, the design architecture of antenna is except mechanical property, also must take basic electrical characteristics into account, for example: the requirement of frequency, gain, polarity, standing-wave ratio or the like, and these characteristics are the different and different of line footpath, length, width, the number of turns and angle along with helix etc., so must scrupulously consider when Antenna Design.

Following point often takes place in the antenna of commonly using when manufacturing:

1, the size of helix, stability not enough because of the accuracy of machine or machine is not good, often causes the deviation of size.

2, helix is by after the plastic cement heating, it is fixing to be pressed in the die cavity cooling via height, improper as if operation control design improper or the mould of plastics charging aperture because of squeezing pressure and speed, and then will cause the parameter generating of helix to change, so that influence the final response of antenna.

3, helix because considering of cost do not have suitable packing equipment, is usually piled up because of mutual colluding with, and is influenced the original designing quality of helix in manufacture process.

4, antenna characteristics need arrive could differentiate after plastic cement extruding is finished whether up to specification; If can not be up to specification, then engineerings such as helix, spiral shell seat, extrusion modling will throw to the winds, if will process again, will cause the waste of manpower and material resources, even the progress of influence production.

This shows, above-mentionedly commonly use problem and the deficiency that antenna is derived, real non-one good design, and demand urgently being improved.

The utility model content

The purpose of this utility model is will solve to commonly use that antenna for mobile phone dimensional accuracy poor stability, parameter of existing in the process of processing easily change and whether up to specification the plastic cement extruding could differentiate problem after finishing, but and provide a kind of overcome above-mentioned shortcoming, little, the steady quality of volume, volume production is easy, cost is low, can adjustment and heavy industry, each parameter computer in simulate and finish definite antenna.

The utility model is at little band metal wire of a body surface coating, this little band metal wire around and in the shape of a spiral shape be arranged at body surface, this body is made up of dielectric material, be connected with little band metal wire in the time of body end face coating metal, the length of this little band metal wire and width and the number of turns and angle are by the characteristic decision of electromagenetic wave radiation.

Described body end face is connected with wiring board.

Described body is to make with the ceramic material of high-dielectric coefficient.

Described high-dielectric coefficient is meant that dielectric coefficient is greater than 4.

Described body can be the assembly of column or square cylinder or taper cylinder or two or more shapes.

Described little band metal line materials can be that the slurry that metal powder is made is coated on the body, and utilize high temperature reduction, metal steam empty evaporation or diffusion modes such as (Diffusion) on the body or the metal wire of alternate manner be looped around and produce L α 1/ √ ε effect on the body.

Described little band metal wire can be single line or multi-thread.

The helixangle of described little band metal wire 〉=0.

The utility model causes this wiring board can become the transmission line of 50 ohm or 75 ohm because of the radio frequency transmission characteristics design because the body end face is connected with wiring board.

The utlity model has following advantage:

1, the ceramic material cost is low.

2, ceramic material can be adjusted different dielectric materials to reach the purpose of miniaturization according to required applying frequency, the dielectric coefficient ε of ceramic material can be between 4～100 or higher, can only be between 2～4 with respect to commonly using its dielectric coefficient of the employed plastics of antenna ε, helical length L α 1/ √ ε, just helical length is directly proportional with square root/one of dielectric material coefficient ε.

3, helix is coated in surface of ceramic body, and manufacture process is simple, the relative metal wire of the size product precision and the reliability height of machine coiling, and product output yield is also higher.The electric field radiation intensity E α ((D*D) of pitch of the laps formula; Sin θ), D wherein is helix external diameter (a ceramic body external diameter); θ is a spiral angle.

4, helix is coated in surface of ceramic body, and is clean through the high temperature sintering rear surface, and that metal wire has greasy dirt with the product of machine coiling is residual.

5, because of helix attached on the ceramic body, the adjustment of antenna frequencies can be removed by the method for laser or machinery, this is to commonly use antenna to be beyond one's reach.

6, cost of goods manufactured is low, and the utility model is because processing procedure is simple, and its cost is about commonly uses 1/3～1/2 of cost.

Description of drawings

Fig. 1 is a structural representation of commonly using antenna.

Fig. 2 is a structural representation of the present utility model.

Embodiment

See also shown in Figure 2, the antenna 2 of the utility model embodiment is at a column 21 end faces metal level 22 of putting on, and be connected with little band metal wire 23 of column 21 appearance coatings, this column 21 is to be made of dielectric material, antenna 2 of the present utility model is to be column 21 with higher dielectric material, general all is the compound of metal oxide, for example aluminium oxide, titanium oxide etc., form ceramic body through high temperature sintering, this ceramic body has high-intensity mechanical performance, and is simultaneously accurate via mould molding size behind sintering; This metal level 22 can be with the silver of silver alloy slurry, utilizes web plate or is stained with and soak or different technology such as roll extrusion is coated on the ceramic body end face; These little band metal wire 23 sizes can be according to the antenna specification, go out required line footpath, length, the number of turns, spiral angle etc. according to computer simulation, carry out tool earlier the silver slurry is coated in surface of ceramic body after steam empty plating or diffusion (Diffusion) by high temperature reduction, metal, make argent attached on the ceramic body.

Claims

1, a kind of antenna, it is characterized in that: it is at little band metal wire of a body surface coating, this little band metal wire around and in the shape of a spiral shape be arranged at body surface, this body is made up of dielectric material, be connected with little band metal wire in the time of body end face coating metal, the length of this little band metal wire and width and the number of turns and angle are by the characteristic decision of electromagenetic wave radiation.

2, a kind of antenna according to claim 1 is characterized in that: described body end face is connected with wiring board.

3, a kind of antenna according to claim 1 is characterized in that: described body is to make with the ceramic material of high-dielectric coefficient.

4, a kind of antenna according to claim 3, it is characterized in that: described high-dielectric coefficient is meant that dielectric coefficient is greater than 4.

5, a kind of antenna according to claim 1 is characterized in that: described body is the assembly of column or square cylinder or taper cylinder or two or more shapes.

6, a kind of antenna according to claim 1, it is characterized in that: described little band metal line materials is that the slurry that metal powder is made is coated on the body, and utilize high temperature reduction, metal steam empty evaporation or diffusion way on the body or metal wire be looped around and produce L α 1/ √ ε effect on the body.

7, a kind of antenna according to claim 1 is characterized in that: described little band metal wire is a single line or multi-thread.

8, a kind of antenna according to claim 1 is characterized in that: the helixangle of described little band metal wire 〉=0.