CN1979949A - Digital television antenna - Google Patents
Digital television antenna Download PDFInfo
- Publication number
- CN1979949A CN1979949A CN 200510130927 CN200510130927A CN1979949A CN 1979949 A CN1979949 A CN 1979949A CN 200510130927 CN200510130927 CN 200510130927 CN 200510130927 A CN200510130927 A CN 200510130927A CN 1979949 A CN1979949 A CN 1979949A
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- antenna
- digital
- substrate
- field
- access area
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Abstract
The digital TV antenna includes antenna region, and grounding region formed on base plate through plated circuit form by using principle of transmission line design. The antenna region includes inductance area with inductance value, and capacitance area with capacitance value. Moreover, antenna region and grounding region forms a capacitance area of having capacitance value. Thus, impedance value of entire antenna obtains optimal match to digital TV signal received.
Description
[technical field]
The invention relates to a kind of digital TV antenna, refer to especially a kind ofly be arranged at digital TV antenna on the substrate in the printed circuit mode.
[background technology]
Now, along with the development of Digital Electronic Technique, its application is also in continuous expansion, for example onboard system and traditional household electrical appliance etc.Particularly Digital Television is more and more accepted by consumers in general with advantages such as its high definition.
The antenna of existing Digital Television is formed by a plain conductor usually, because antenna receives the needs of signal wavelength, its length must reach certain length, so its length is longer, it is bigger to take up room, and bending distortion easily.On the other hand, existing digital TV antenna is because it adopts single wire to constitute, on Antenna Design, be difficult for adjusting its resistance value to reach the matching value that receives television signal the best, though be aided with the resistance value that assemblies such as extra increase capacitor and inductor are regulated antenna, but because will additionally increase assembly, so consider the position of assemblies such as these capacitor and inductors, therefore increase manufacturing cost and produce yield keyholed back plate problem.
In view of this, a kind of new scheme of necessary proposition is to overcome the aforementioned disadvantages of prior art.
[summary of the invention]
The present invention's main purpose is to provide scaled-down version digital TV antenna design, particularly a kind ofly is arranged on the substrate in the printed circuit mode, and has the digital TV antenna of impedance matching and frequency resonance effect.
For reaching above-mentioned purpose, a kind of digital TV antenna of the present invention, it comprises that utilization transmission line design principle is formed at antenna field on the substrate in the printed circuit mode, this antenna field forms has the induction areas of inductance value and the capacitor regions of capacitance, add and give antenna field and access area and form capacitor regions with capacitance, make the resistance value and the receiving digital television signal of entire antenna obtain optimum Match, reach the optimum efficiency of frequency resonance.
The present invention it adopt the mode of printed circuit that digital TV antenna is formed on the substrate, can shorten the outward appearance length of antenna under the situation that satisfies antenna function equally.In addition, be formed at the antenna on the substrate, its circuit forms has the induction areas of certain inductance value and the electric capacity territory of capacitance, in addition it has the capacitor regions of capacitance with access area formation, make the whole satisfied resistance value that signal is complementary that receives of antenna, do not need additionally to add assembly, simple and practical.
[description of drawings]
Fig. 1 is the schematic appearance of the present invention's digital TV antenna.
Fig. 2 is the present invention's digital TV antenna structure schematic diagram.
Fig. 3 is the shell and the holder schematic diagram of the present invention's digital TV antenna.
Fig. 4 is two transmission lines and equivalent circuit theory figure thereof.
Fig. 5 a is the principle schematic that the high-impedance transmission line equivalence becomes series inductance.
Fig. 5 b is the principle schematic that the equivalence of Low ESR transmission line becomes shunt capacitance.
Fig. 6 constitutes the equivalent circuit theory figure of transmission line jointly for the height impedance transmission lines.
Fig. 7 is the voltage standing wave(VSW) ratio figure of digital TV antenna of the present invention.
[embodiment]
See also Fig. 1, digital TV antenna 10 of the present invention, it comprises a substrate 1, and this substrate 1 can be printed circuit board (PCB), and the transmission line with printed circuit mode metal lining material on it forms antenna field 2.In the present embodiment, this antenna is to be that the Digital Television signal of 533MHz～599MHz is designed at frequency, aforesaid base plate 1 can adopt FR4 Glass Fibre Double panel material to make, and this kind FR4 Glass Fibre Double panel is low price but also obtain easily not only, and is very convenient in the making of circuit.
As shown in Figure 1, the antenna field 2 of plating on substrate 1 one side is to be formed on the substrate 1 in the printed circuit mode by metal material, and this metal material can be copper or other has the metal of satisfactory electrical conductivity.It comprises the rectangle strip sintering 21 that extends to form this antenna field 2 before the mediad of substrate 1 end.21 continue to extend forward from the sintering, form rectangle shaped as frame capacitive region 22.Extend forward from rectangle shaped as frame capacitive region 22 and to be bent to form the inductor section 23 that is crooked waveform.Extend to form the bonding pad 24 of one section rectangle strip forward from crooked waveform inductor section 23.24 tip forward extend to form a funnelform reception area 25 from the bonding pad.21 ends are provided with solder joint 4 in the sintering of antenna field 2, and outside signal line (not shown) can be connected with antenna field 2 by this solder joint 4.
See also shown in Figure 2, the another side relative on substrate 1 with antenna field 2 places surfaces, from the identical end in the sintering 21 of substrate 1 and antenna field 2, close substrate 1 dual-side extends to form the access area 3 that roughly is the U font forward.This access area 3 also is that conductive material is formed on the substrate 1 in the printed circuit mode.3 end is provided with solder joint 5 equally in the access area, and external ground line (not shown) can be connected with access area 3 by this solder joint 5.
In conjunction with Figure 1 and Figure 2, this access area 3 is positioned at the another side of substrate 1 with respect to the sintering 21 of antenna field 2 and the both sides of capacitive region 22 in the present embodiment, therefore between antenna field 2 and access area 3, form capacity effect, and the inductor section 23 of antenna field 2 is owing to form crooked waveform configuration, thereby has inductive effect.
See also shown in Figure 3ly, can be covered with the protecting sheathing 6 of a plastic material in antenna 10 outsides, in order to protect the structure of this digital TV antenna.In antenna 10 bottoms one magnetic adsorption site 7 can be set, make this antenna adsorbable on the object of being placed, but the effect of this magnetic adsorption site 7 and enhanced grounding.
Inductance value in this antenna 10 and capacitance can be calculated by following principle and try to achieve: because the equivalent electric circuit of transmission line can be considered the effect of connecting that resistance composition and inductance composition are arranged; Have the electric capacity composition to lead the in parallel of composition with electricity and can be considered between two transmission lines, antenna field 2 promptly is equivalent to two transmission lines with access area 3 in this antenna 10.As shown in Figure 4, show two parallel transmission-lines and its equivalent electric circuit, transmission-line equivalent circuit is considered as series component, if positive reactive promptly is inductive, two transmission are considered as parallel component, if negative reactance promptly is capacitive character, equivalent electric circuit as shown in Figure 4, X/2=Z among the figure
0Tan (β λ/2) (calling (formula one) in the following text), B=1/Z
0Sin β λ (calling (formula two) in the following text).
If this transmission line is enough lacked (for example β λ＜π/4), and characteristic impedance is very high, then (formula one) and (formula two) can be approximately X ≈ Z
0β λ; B ≈ 0, its equivalent electric circuit is shown in the inductance of a series connection of Fig. 5 a.If this transmission line is still enough short, its characteristic impedance is very low, and then (formula one) and (formula two) can be approximately X ≈ 0; B ≈ Y
0β λ, its equivalent electric circuit is shown in the electric capacity of a parallel connection of Fig. 5 b.
As shown in Figure 6, if with high-impedance transmission line and Low ESR transmission line be combined into transmission line framework.High impedance (Z
0=Z
h) transmission line can be similar to a series connection inductance, and series capacitance can be used Low ESR (Z
0=Z
l) transmission line is approximate.
Among the present invention, rectangle shaped as frame capacitive region 22 in the antenna field 2 and the capacity effect between the access area 3, the structure of capacitive region 22 that can be by adjusting antenna obtains suitable capacitance, and the inductance value of inductor section 23 can be according to inductance formula L=(0.394* (r^2) * (N^2))/((9*r)+(10*l)) (L: electric capacity, r: coil radius, N; Wire circle, l: loop length) calculate, length by regulating inductor section and coil radius wait regulates inductance value.Because the inductive effect of the capacity effect between antenna field 2 and the access area 3 and the inductor section 23 of antenna field 2 makes entire antenna 10 can have by the structure of regulating self and receives the resistance value that signal is complementary.
This antenna 10 is designed at the Digital Television signal of 533MHz～599MHz in the present embodiment, and its capacitive region 22 and inductor section 23 are shaped as rectangular block and crooked waveform.Also can antenna be made other shape in other embodiments,, the resistance value of entire antenna be reached with the signal that is received be complementary to reach predetermined electric capacity and inductance value according to aforementioned principles.
See also shown in Figure 7ly, detect through experiment, the voltage standing wave(VSW) ratio of this antenna 10 (VoltageStanding Wave Ratio, VSWR) between 533MHz～599MHz frequency range all less than 2, therefore confirm that digital TV antenna of the present invention has good matching Design.
Digital TV antenna of the present invention because the metal transmission line that will constitute antenna field is formed on the substrate in the printed circuit mode, can be saved the shared length of antenna satisfying under the situation of antenna length.And utilize antenna field itself to form shape with electric capacity and inductance value, can make the impedance of antenna integral body and the signal impedance matching that institute's desire receives, to strengthen the transmission quality of this digital TV antenna.
Claims (10)
1. a digital TV antenna, it is characterized in that: it comprises substrate, antenna field and access area, antenna field is formed in the printed circuit mode on the surface of this substrate, is formed with a capacity effect district and an inductive effect district on this antenna field; The access area is formed on this substrate another surface relative with this antenna field in the printed circuit mode, and it forms capacity effect with respect to the both sides that this capacity effect district is formed at this substrate.
2. digital TV antenna as claimed in claim 1 is characterized in that: this capacity effect district is a rectangular block.
3. digital TV antenna as claimed in claim 1 is characterized in that: this inductive effect district is a crooked waveform district.
4. digital TV antenna as claimed in claim 1 is characterized in that: this access area is the district that takes the shape of the letter U.
5. digital TV antenna as claimed in claim 1 is characterized in that: this antenna field also comprises a funnel-form reception area that extends from this inductive effect district one end.
6. digital TV antenna as claimed in claim 1 is characterized in that: this antenna field also comprises a sintering of extending from this capacity effect district one end.
7. digital TV antenna as claimed in claim 1 is characterized in that: be provided with a solder joint with this antenna field connecting place on this substrate, this antenna field is by this solder joint transmit antenna signal.
8. digital TV antenna as claimed in claim 1 is characterized in that: be provided with a solder joint with this access area connecting place on this substrate, ground connection is reached by this solder joint in this access area.
9. digital TV antenna as claimed in claim 1 is characterized in that: this antenna comprises that in addition a plastic protection shell cover covers this substrate.
10. digital TV antenna as claimed in claim 1 is characterized in that: this antenna comprises that in addition one can be arranged at the magnetic holder of this digital TV antenna fixed placement on this substrate the end near this access area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510130927 CN1979949A (en) | 2005-12-08 | 2005-12-08 | Digital television antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510130927 CN1979949A (en) | 2005-12-08 | 2005-12-08 | Digital television antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1979949A true CN1979949A (en) | 2007-06-13 |
Family
ID=38131022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510130927 Pending CN1979949A (en) | 2005-12-08 | 2005-12-08 | Digital television antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1979949A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104617374A (en) * | 2009-11-20 | 2015-05-13 | 株式会社村田制作所 | Mobile communication terminal |
-
2005
- 2005-12-08 CN CN 200510130927 patent/CN1979949A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104617374A (en) * | 2009-11-20 | 2015-05-13 | 株式会社村田制作所 | Mobile communication terminal |
| CN104617374B (en) * | 2009-11-20 | 2018-04-06 | 株式会社村田制作所 | Mobile communication terminal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20070613 |