CN201773938U

CN201773938U - Built-in digital television antenna

Info

Publication number: CN201773938U
Application number: CN2010202171952U
Authority: CN
Inventors: 游宏明
Original assignee: WIESON TECHNOLOGIES (DONGGUAN) Co Ltd
Current assignee: WIESON TECHNOLOGIES (DONGGUAN) Co Ltd
Priority date: 2010-06-01
Filing date: 2010-06-01
Publication date: 2011-03-23
Anticipated expiration: 2020-06-01

Abstract

The utility model discloses a built-in digital television antenna, which comprises a circuit substrate, a radiation conductor circuit, a grounding circuit and a grounding metal structure, wherein the radiation conductor circuit and the grounding circuit are formed on the circuit substrate, and the grounding metal structure is connected to a system grounding surface. Besides, a preset coupling distance is arranged between the radiation conductor circuit and the grounding circuit.

Description

The DVB-T antenna of in-building type

Technical field

The utility model relates to a kind of DVB-T antenna of in-building type, refers in particular to a kind of coupling effect of utilizing original dual-band antenna is entered rank for having the in-building type DVB-T antenna of wideband, single-frequency receiving feature.

Background technology

The Digital Audio Broadcasting television system imports in the general domestic environments gradually, Taiwan system adopts the system of Europe rule DVB-T (Digital Video Broadcasting-Terrestrial), in order to be received in all programs of UHF BAND, usually need the Digital Audio Broadcasting television antenna of a frequency from 470MHz to 860MHz, and the common traditionally signal that utilizes pull bar shape antenna to be used to receive the Digital Audio Broadcasting television system.

Pull bar shape antenna is to utilize the unipole antenna principle, the Design of length of this antenna is 1/4th of a wavelength, the structure system of pull bar shape antenna utilizes metal wire to be wound in a columnar object with helical form and is taken in as radiating principal, shorten the equivalent length of antenna with spiral helicine structure, and add a ground plane in antenna base, this type of antenna reception is poor slightly, and inconvenient on using, and also slightly dislikes excessive on the volume.

Because existing DVB-T antenna volume is too huge, cause the inconvenience of carrying.

In addition, look the development of technology and information transmission along with the numerical digit news, notebook computer also need have the function that receives wireless DVB-T signal, therefore notebook computer needs external or built-in antenna, to receive the video signal of different frequency, anticipate promptly, antenna performance needs great video signal and receives frequency, can meet the requirement in the use.

Moreover common DVB-T reception antenna mostly is the unipole antenna form, and its shortcoming is for occupying solid space and frequency range deficiency.

The applicant is because the disappearance of the above-mentioned constructional device of commonly using during with actual the use, and the accumulation individual is engaged on the related industry exploitation practice experience for many years, studies intensively, and proposes a kind of reasonable in design and effectively improve the structure of the problems referred to above finally.

The utility model content

Main purpose of the present utility model provides a kind of television antenna of in-building type, this antenna simple in structure, make easily, be beneficial to planar object and combine and be installed in the electronic product, can reach the advantage of saving the space, to be applicable to the electronic product of thin typeization, miniaturization.

Another purpose of the present utility model provides a kind of DVB-T antenna of in-building type, its have simple in structure, make easily, and be convenient to combine with planar object, for example system ground occupies solid space or oversize problem to solve traditional antenna.

A purpose more of the present utility model provides a kind of DVB-T antenna of in-building type, and it can be in order to receive the single-frequency wide frequency antenna of DVB-T signal, to solve the problem of traditional antenna frequency range deficiency.

For achieving the above object, the utility model adopts following technical scheme:

A kind of DVB-T antenna of in-building type is to comprise: a circuit substrate; Be formed in the radiation conductor circuit of this circuit substrate: be formed in the ground path of this circuit substrate, wherein have a predetermined coupling distance between this radiation conductor circuit and the ground path, to receive the DVB-T signal; An and grounded metal structure that is connected in system ground.As above-mentioned structure, radiation conductor circuit and ground path that the DVB-T aerial system utilization of this in-building type takes shape in circuit substrate form coupling effect, so that the antenna of the utility model can be used for receiving the audio frequency wide frequency antenna of DVB-T signal.In one embodiment, the DVB-T aerial system of this in-building type can be installed in the screen edge of notebook computer (for example cover rim), and its size can adjust according to the space at notebook computer screen edge, to meet customized specification requirement.

A kind of electronic product is to comprise: a loam cake, and side is provided with a system ground within this loam cake; And a DVB-T antenna that is installed on the in-building type in this loam cake, the DVB-T antenna of this in-building type comprises: a circuit substrate; Be formed in the radiation conductor circuit of this circuit substrate; Be formed in the ground path of this circuit substrate, wherein have a predetermined coupling distance between this radiation conductor circuit and the ground path, to receive the DVB-T signal; An and grounded metal structure that is connected in system ground.

In sum, the utlity model has following all advantage:

1, the DVB-T antenna of in-building type of the present utility model has low cost of manufacture, processing procedure is simple and easy and the installing easy, so that this DVB-T antenna can cooperate the space of product and reach the advantage of easy configuration.

2, the DVB-T antenna of in-building type of the present utility model have simple in structure, make easily, and be beneficial to planar object and combine, form a kind of DVB-T antenna that on industrial circle, has value, more can reach the advantage of saving the space, to improve the market competitiveness.

For more clearly setting forth architectural feature of the present utility model and effect, come the utility model is elaborated below in conjunction with accompanying drawing and specific embodiment:

Description of drawings

Fig. 1 is the stereogram of DVB-T antenna of the in-building type of the utility model;

Figure 1A is the plane graph of DVB-T antenna of the in-building type of the utility model;

Fig. 2 is that the DVB-T antenna of the in-building type of the utility model is installed on the schematic diagram that covers on the notebook computer;

Fig. 3 is the S22 resolution chart of DVB-T antenna of the in-building type of the utility model.

The accompanying drawing identifier declaration:

1, DVB-T antenna 10, the circuit substrate of in-building type

11, radiation conductor circuit 110, signal load point

12, ground path 120, earth point

13, grounded metal structure 14, the coaxial transmission line of connected system ground plane

141, center conductor 142, outer layer conductor

20, loam cake 21, system ground

D, predetermined coupling distance

Embodiment:

At first, please refer to Fig. 1 to shown in Figure 3, the utility model proposes a kind of DVB-T antenna 1 of in-building type, it comprises: circuit substrate 10, radiation conductor circuit 11, ground path 12 and be connected in the grounded metal structure 13 of system ground; Wherein radiation conductor circuit 11 all takes shape in this circuit substrate 10 with ground path 12, and has a predetermined coupling distance D between radiation conductor circuit 11 and the ground path 12, make between radiation conductor circuit 11 and the ground path 12 and form coupling effect, and then make the DVB-T antenna 1 of in-building type can form a kind of in order to receive the single-frequency wide frequency antenna of DVB-T signal.

Shown in the 1st figure and the 2nd figure, DVB-T antenna 1 owner of this in-building type will be installed on the display panel areas of portable electronic product, but not as limit.In the present embodiment, this ground path 12 is to utilize the metallic film mode of printing to take shape on the circuit substrate 10, and the part of this ground path 12 system is electrically connected at the grounded metal structure 13 of connected system ground plane, to form ground connection, the grounded metal structure 13 on connected system ground can be a kind of flexual metal patch, and one of this metal patch lateral margin system is fixed in the part of this ground path 12; In addition, radiation conductor circuit 11 can utilize the metallic film mode of printing to take shape on the circuit substrate 10 equally, radiation conductor circuit 11 does not contact with ground path 12, and form a predetermined coupling distance D between the two, in other words, form a respective distance that is electrically insulated (promptly predetermined coupling distance D) between radiation conductor circuit 11 and the ground path 12, should respond to the optimization frequency effect to reach coupling energy by predetermined coupling distance D by adjusting, for example should predetermined coupling distance D be between 0.3 to 2 millimeter, so that the DVB-T antenna 1 of this in-building type can be used for receiving the DVB-T signal of DVB-TU-Brand (470 to 860MHz).

Again on the one hand, has a signal load point 110 on the radiation conductor circuit 11, has an earth point 120 on this ground path 12, and the DVB-T antenna 1 of in-building type more comprises a coaxial transmission line 14, the center conductor 141 and the outer layer conductor 142 of this coaxial transmission line 14 is to be electrically connected at this signal load point 110 and this earth point 120 respectively, the other end of coaxial transmission line 14 then connects the signal source with system, so ground path 12, the grounded metal structure 13 of connected system ground plane is idiostatic with the earth terminal of system's (as notebook computer), to reach the effect of stablizing frequency range.

In addition, in this embodiment, in order to reach customized requirement, the size of this circuit substrate 10 is limited, in order to prolong the length of radiation conductor circuit 11, to control the centre frequency of second mode (upper frequency), make frequency of heart among its convergence first mode (lower frequency), can reach the frequency range of a wideband operation of synthesizing by above-mentioned first and second mode, and form a kind of wide frequency antenna that is applied to receive the single-frequency signal, and contain DVB-T channel (470 to 860MHz).This concrete structure system that implements is designed to have two bendings with radiation conductor circuit 11, and formation U font, to extend the length of radiation conductor circuit 11, and then reach the effect of wide frequency antenna, and in this specific embodiment, it is not isometric that two of the radiation conductor circuit 11 of this U font extends support arm, and one of them end that extends support arm then is above-mentioned fast load point 110.Yet, consider shape, the size of this circuit substrate 10, the utility model does not limit radiation conductor circuit 11 must have and the identical structure of this case, and for example, radiation conductor circuit 11 has one or more bending, also is the novel category of this usefulness.

Moreover, consider shape, the size of this circuit substrate 10 equally, this ground path 12 has three bendings at least, to extend its length; One end of this ground path 12 then is above-mentioned earth point 120.In other words, the space of the abundant applicable circuit substrate 10 of the utility model bends the length of extending radiation conductor circuit 11 and ground path 12, make circuit layout and element ornament space can reach the flexible advantage that has more, and more efficient being applied in the electronic product, so that the DVB-T antenna 1 of this in-building type has is simple in structure, make easily and the low advantage of cost.

Fig. 3 and table have shown the antenna performance resolution chart and the experimental data of the DVB-T antenna 1 of this in-building type first, wherein, by the extension path of adjusting radiation conductor circuit 11, make that two resonance modes of this antenna are excited in close frequency, an and then synthetic wideband mode, to contain the operational frequency bands of DVB-T channel (470 to 860MHz), so can make the DVB-T antenna 1 of the in-building type of the utility model have the characteristic of wideband.

Table one

Read a little	1	2	3	4	5	6	7	8	9
										Frequency (MHz)	474	522	570	618	666	714	762	810	858
S22	3.52	2.96	3.61	3.42	3.66	3.24	2.83	2.69	2.43

The DVB-T antenna 1 of this in-building type can be installed on the portable electronic product, please refer to Fig. 2, its DVB-T antenna 1 that shows in-building type is installed on notebook computer or portable type body playing device (Portable Media Player, PMP) lid 20 inboards on, with display panel areas corresponding to notebook computer, as shown in the figure, the DVB-T antenna 1 that has five in-building types is installed on the inner edge (being screen edge) of lid 20 on the notebook computer, and lid 20 inboards more are provided with a system ground 21 on the notebook computer, the DVB-T antenna 1 of this in-building type is to be fixed in this system ground 21 by grounded metal structure 13 in the mode of pasting, with the contact area of the DVB-T antenna 1 that enlarges in-building type, and help the adjustment of antenna bandwidth and impedance; But not as limit.

In addition, on the structure of assembling, the DVB-T antenna 1 of this in-building type is the direction that extends to loam cake 20 centers along loam cake 20 outer rims with the arrangement of system ground 21, have putting in order of radiation conductor circuit 11, ground path 12 and system ground 21 (grounded metal structure 13), and utilize the DVB-T antenna 1 of this in-building type to receive the DVB-T signal, will be built in the purpose of notebook computer (or other electronic products) in the DVB-T antenna to reach.

In sum, the utlity model has following all advantage:

The above, it only is preferred embodiment of the present utility model, be not that technical scope of the present utility model is imposed any restrictions, so every foundation technical spirit of the present utility model all still belongs in the scope of technical solutions of the utility model any trickle modification, equivalent variations and modification that above embodiment did.

Claims

1. the DVB-T antenna of an in-building type is characterized in that: be to comprise:

One circuit substrate;

Be formed in the radiation conductor circuit of this circuit substrate;

Be formed in the ground path of this circuit substrate, wherein have a predetermined coupling distance between this radiation conductor circuit and the ground path, to receive the DVB-T signal;

One is connected in the grounded metal structure of system ground.

2. according to the DVB-T antenna of the described in-building type of claim 1, it is characterized in that: more include a coaxial transmission line, and this radiation conductor circuit has a signal load point, this ground path has an earth point, wherein, the center conductor of this coaxial transmission line is to be electrically connected at this signal load point and this earth point respectively with outer layer conductor.

3. according to the DVB-T antenna of the described in-building type of claim 2, it is characterized in that: this predetermined coupling distance is between 0.3 to 2 millimeter.

4. according to the DVB-T antenna of the described in-building type of claim 2, it is characterized in that: this radiation conductor circuit has a bending at least.

5. according to the DVB-T antenna of the described in-building type of claim 2, it is characterized in that: this radiation conductor circuit has two bendings, and two extension support arms of this radiation conductor circuit are not isometric.

6. according to the DVB-T antenna of the described in-building type of claim 2, it is characterized in that: this ground path has three bendings at least.

7. electronic product is characterized in that: be to comprise:

One loam cake, side is provided with a system ground within this loam cake; And

One is installed on the DVB-T antenna of the in-building type in this loam cake, and the DVB-T antenna of this in-building type comprises:

One circuit substrate;

Be formed in the radiation conductor circuit of this circuit substrate;

Be formed in the ground path of this circuit substrate, wherein have a predetermined coupling distance between this radiation conductor circuit and the ground path, to receive the DVB-T signal; And

One is connected in the grounded metal structure of system ground.

8. the electronic product according to claim 7, it is characterized in that: more comprise a coaxial transmission line, and this radiation conductor circuit has a signal load point, this ground path has an earth point, wherein, the center conductor of this coaxial transmission line one end is to be electrically connected at this signal load point and this earth point respectively with outer layer conductor, and this coaxial transmission line other end then is connected in the signal source of system.

9. described according to Claim 8 electronic product is characterized in that: this predetermined coupling distance is that this radiation conductor circuit has two bendings, and this ground path has three bendings at least between 0.3 to 2 millimeter.

10. described according to Claim 8 electronic product is characterized in that: extend to the direction at loam cake center along this loam cake outer rim, have putting in order of radiation conductor circuit, ground path and system ground.