CN201638938U - Wide frequency-band flat and small-sized receiving antenna used for receiving of terrestrial broadcasting for digital television - Google Patents
Wide frequency-band flat and small-sized receiving antenna used for receiving of terrestrial broadcasting for digital television Download PDFInfo
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- CN201638938U CN201638938U CN201020000739XU CN201020000739U CN201638938U CN 201638938 U CN201638938 U CN 201638938U CN 201020000739X U CN201020000739X U CN 201020000739XU CN 201020000739 U CN201020000739 U CN 201020000739U CN 201638938 U CN201638938 U CN 201638938U
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- metal plate
- antenna
- planar metal
- hollow out
- center line
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Abstract
The utility model discloses a wide frequency-band flat and small-sized receiving antenna used for receiving of terrestrial broadcasting for digital televisions. The antenna comprises a dielectric substrate with an upper surface, a lower surface, a first metal radiating part and a second metal radiating part, wherein, the upper surface and the lower surface are parallel to each other; the first metal radiating part is arranged on the upper surface; the second metal radiating part is arranged on the lower surface; the first metal radiating part comprises a first plane metal plate positioned at the top end of the dielectric substrate and a micro-strip metal wire extending in the vertical middle line direction of the plane metal plate; a grounding metal wire is in contact with the first plane metal plate at a point and forms an obtuse angle with the edge of the first plane metal plate on two sides of the contact point; a hollowed-out part is arranged on the first plane metal plate; the second metal radiating part adopts a second plane metal plate positioned at the bottom end of the dielectric substrate; and a hollowed-out part is arranged on the second plane metal plate. Due to the hollowed-out parts, the current distribution is changed, the number of electrical current paths is increased, the size of the antenna is reduced, and the antenna has the characteristics of ultra wide band, low profile and omnidirectional radiation.
Description
Technical field
The utility model is about a kind of flat plane antenna, especially a kind of small-sized reception antenna in broadband plane that is used for the receiving digital television terrestrial broadcasting.
Background technology
Digital tv ground broadcasting is owing to realizing that the function that mobile TV and TV signal blind area cover receives much concern at present.In American-European countries, especially Britain's digital tv ground broadcasting extensively is used, and has also occurred and China has the digital tv ground broadcasting of independent intellectual property right, and has had Experimental Network in several provinces and cities.The shared frequency range of digital tv ground broadcasting is a uhf band, though in each countries and regions, concrete application band is slightly different, but all is comprised at present in the frequency range of 470MHz-850MHz of UHF, then is wherein important component part as the reception antenna of this system.
Present Digital Television Terrestrial Broadcasting reception antenna mainly produces with two kinds of forms: 1, whip antenna is a kind of flexible vertical flagpole antenna, and its length is generally 1/4 or 1/2 wavelength.Most of whip antennas are property-line and use earth mat not.Small-sized whip antenna often utilizes the metal shell of low power station to make earth mat.Sometimes in order to increase the effective depth of whip antenna, can add some little spoke shape blades on the top of whip antenna or at middle-end coilloading of whip antenna etc.It utilizes the dipole of traditional form or monopole form to design, and most important shortcoming is that broadband character is bad, is not simultaneously that low section and size are bigger.Because dipole and monopole are resonance structure, so limited bandwidth, can't satisfy 58% broadband requirement.Simultaneously, owing to be not low section, can't satisfy the requirement of present miniaturization terminal equipment.2, the ceiling mount antenna of little band forms, it is little, the in light weight low section of volume generally, but realize that the greatest irradiation direction is mapped in the end-fire scope from the limit and adjust by designing different little band unit, and can not realize omnidirectional radiation, need claim for user installation like this, the blind spot region of signal for mobile device, can occur can not receive simultaneously.
Summary of the invention
At the existing shortcoming of present antenna, the application has designed a kind of novel antenna form, at first can have the characteristics of ultra broadband, can cover the 470MHz-850MHz whole frequency fully.Secondly, have the characteristics of low section, complanation.The 3rd, have the pattern characteristics of omnidirectional radiation.At last, have the characteristics of miniaturization, and miniaturization and the characteristics that are easy to make make also this antenna have characteristic cheaply.
For realizing the purpose of this utility model, this antenna comprises having the upper surface that is parallel to each other and the medium substrate of a lower surface, be arranged at the first metal Department of Radiation of described upper surface, and be arranged at the second metal Department of Radiation of described lower surface, wherein, the described first metal Department of Radiation comprises that first planar metal plate that is positioned at described medium substrate top reaches in the vertical center line side of planar metal plate upwardly extending little band metal wire, described grounded metal line and described first planar metal plate have contact point, and become the obtuse angle angle with the edge of described first planar metal plate of contact point both sides, described first planar metal plate is provided with openwork part, the described second metal Department of Radiation be positioned at described medium substrate bottom second planar metal plate, described second planar metal plate is provided with openwork part.
Preferably, the contact point of described grounded metal line and described first planar metal plate, projection on the vertical direction of described medium substrate drops on outside described second planar metal plate, to form coupling between described first planar metal plate and described second planar metal plate.
Preferably, the openwork part that is provided with on described first planar metal plate is that 4 sizes are identical, regular geometry, and first hollow out of arranging in two row, the two row modes of symmetry.
Preferably, in described first hollow out first row hollow out, long 32mm, wide 16mm, the hollow out top edge is apart from metal top 40mm, about two hollow outs be in the 1.5mm place of described vertical center line respectively near the edge of the vertical center line of described first planar metal plate, the corner is that radius is the quadrant arc of 5mm; The long 32mm of the second row hollow out, wide 16mm, the hollow out top edge is apart from metal top 80mm, about two hollow outs be in the 1.5mm place of described vertical center line respectively near the edge of the vertical center line of described first planar metal plate, the corner is that radius is the quadrant arc of 5mm.
Preferably, the openwork part that is provided with on described second planar metal plate is that 2 sizes are identical, has regular geometric shapes, and is second hollow out that symmetry axis is arranged with the vertical center line of described second planar metal plate.
Preferably, described second hollow out is combined by rectangle and semicircle, and form a closed geometric shape, wherein, the edge of the vertical center line of close described second planar metal plate of rectangle is 30mm to the vertical range of described vertical center line, long 10mm, high 30mm, the right and left is that radius is the semicircle of 15mm, and the hollow out lower limb is apart from substrate lower edge 20mm.
Preferably, the dielectric constant of described medium substrate is 4.4.
The covering frequence of described antenna is 470MHz-850MHz.
By being arranged on the openwork part on the planar metal plate, changed the form of existing complanation broadband monopole antenna.When not having hollow out, the dimensional requirement of broadband monopole is 1/4th of a low-frequency range corresponding wavelength, promptly about 160mm, and after having added openwork part, increases current path to make size become about 110mm, thereby realizes the miniaturization of antenna.
Description of drawings
Fig. 1 is the forward perspective view of antenna among the application;
Fig. 2 is the forward view of the first metal Department of Radiation of antenna among the application;
Fig. 3 is the forward view of the second metal Department of Radiation of antenna among the application;
Fig. 4 is the DYNAMIC DISTRIBUTION figure of antenna electric current when 470MHz among the application, and standing wave is to the variation of row ripple;
Fig. 5 is the DYNAMIC DISTRIBUTION figure of antenna electric current when 850MHz among the application, and standing wave is to the variation of row ripple;
Fig. 6 is the impedance matching situation of antenna port among the application;
Fig. 7 is the omnidirectional radiation pattern of antenna among the application;
Embodiment
As shown in Figure 1, be the front perspective view of the application's antenna.Wherein, this antenna comprises medium substrate 2, is positioned at the first metal Department of Radiation 3 and the second metal Department of Radiation 1 that is positioned at substrate 2 lower surfaces of substrate 2 upper surfaces.Wherein the first metal Department of Radiation 3 comprises the first planar metal plate ABCDE and little band metal wire DK, and described little band metal wire DK and contacts with each other the point in D on the bearing of trend of the vertical center line of the described first planar metal plate ABCDE.Described first planar metal plate is arranged at the top of described medium substrate, the approximate top edge that is parallel to described medium substrate of limit AB, the last top drift angle that approaches described medium substrate that angle A, B are approximate.First planar metal plate and grounded metal line are electrically connected on the D point, or first planar metal plate and little band metal wire are an integral body, are promptly processed by same sheet metal stock.It is not parallel that first planar metal plate is positioned at limit DE, DG and the limit AB at contact point D two ends, and be formed with the obtuse angle angle that equates with little band metal wire DK simultaneously.This first planar metal plate is provided with first openwork part.
The second metal Department of Radiation 1 that is positioned at substrate 2 lower surfaces is one second planar metal plate FGHI, the described second planar metal plate FGHI is arranged at the bottom of described medium substrate 2, the approximate lower limb that is parallel to described medium substrate of limit HI, the following bottom drift angle that approaches described medium substrate that angle H, I are approximate.This second planar metal plate is provided with second openwork part.
Shown in Fig. 2,3, be respectively forward view at the first metal Department of Radiation of medium substrate 2 upper surfaces, with forward view at the second metal Department of Radiation of medium substrate 2 lower surfaces, wherein have on the first planar metal plate ABCDE on first openwork part, 201, the second planar metal plate FGHI and have second openwork part 301.First openwork part 201 can be divided into two row, 202 and 203.The setting of openwork part is in order to change the distribution of electric currents by these hollow outs, and makes antenna be operated on the lower frequency having under the less size.Because the size wavelength corresponding with working frequency range of antenna is directly proportional, the long wavelength of low frequency correspondence needs a long current path, and the existence of these hollow outs has promptly prolonged current path, and makes antenna have less size.
First hollow out and second hollow out can be designed as the sky with rule or random geometry, and the quantity of hollow out also can obtain its desired effect by test of many times by those skilled in the art.Among the application, first hollow out be set to 4 sizes identical, be the shape that rectangle that two row, the two row modes of symmetry axis are arranged adds fillet with the vertical center line of first planar metal plate, it is identical that second hollow out is set to 2 sizes, is that the rectangle that symmetry axis is arranged adds semi-circular shape with the vertical center line of second planar metal plate.Also can these hollow outs be set to: pure rectangle, pure square, pure circle, pure ellipse etc., these shapes also can make antenna have certain miniaturization characteristics, but effect or present use is best.
For first hollow out, its position and size are set to, in first hollow out first row hollow out, long 32mm, wide 16mm, the hollow out top edge is apart from metal top 40mm, about two hollow outs be in the 1.5mm place of described vertical center line respectively near the edge of the vertical center line of described first planar metal plate, the corner is that radius is the quadrant arc of 5mm; The long 32mm of the second row hollow out, wide 16mm, the hollow out top edge is apart from metal top 80mm, about two hollow outs be in the 1.5mm place of described vertical center line respectively near the edge of the vertical center line of described first planar metal plate, the corner is that radius is the quadrant arc of 5mm.
For second hollow out, its position and size are set to, described second hollow out is combined by rectangle and two semicircles that are arranged on the rectangle both sides, and form a closed geometric shape, wherein, the edge of the vertical center line of close described second planar metal plate of rectangle is 30mm to the vertical range of described vertical center line, long 10mm, high 30mm, the right and left are that radius is the semicircle of 15mm, and the hollow out lower limb is apart from substrate lower edge 20mm.
The height of the in the vertical direction of second planar metal plate is slightly less than the length of grounded metal line, make the contact point D of the grounded metal line and first planar metal plate on perpendicular to the medium substrate direction,, outside the scope of second planar metal plate, be coupled at the subpoint on the medium substrate lower surface between described first planar metal plate and described second planar metal plate, to form.
Shown in Fig. 4-5, provided under the application's preferred forms, the DYNAMIC DISTRIBUTION figure of electric current when 470MHz and 850MHz, and standing wave respectively is to the variation of row ripple.
By above-mentioned antenna structure, because this antenna is similar to the broadband monopole antenna, be aided with the general knowledge and the test of this area, can make the whole frequency of the 470MHz-850MHz that covers UHF fully of antenna.Simultaneously, if there is not the part of those hollow outs on this antenna, it is exactly the form of a complanation broadband monopole.When not having hollow out, it is 1/4th of low-frequency range corresponding wavelength that the length dimension of broadband monopole requires, and promptly about 160mm, increases current path behind the openwork part and makes length dimension become about 110mm and added.Therefore, for the covering of low frequency, main parameter comprises the shape, length and width size of the length of the length of upper strata antenna and wide, lower floor and wide, openwork part and in the relative position parameter that is on the antenna.And for the covering of high frequency, to be the length and width on the length and width of antenna, floor, top antenna element transform to the gradual change slope of wide line and the position of beginning gradual change and the distance between the upper edge, floor from narrow line to main parameter.Antenna presents the standing wave resonance state at the low frequency place, and presents the traveling-wave antenna state at high frequency treatment, thereby has realized a miniature ultra wide band antenna.Because the existence of hollow out has prolonged current path, has reduced antenna size, and then make the thickness of medium substrate of carrying Department of Radiation also reduce, in this application, the thickness of the medium substrate of use is only about 1mm.
As shown in Figure 6, this impedance matching figure has provided under the application's preferred forms, the impedance matching situation of antenna port is promptly mated bandwidth and since require on the engineering VSWR be voltage standing wave ratio less than 2, therefore from this figure as can be seen this antenna covered 470MHz-850MHz fully.
Because the principal current direction of monopole antenna is along length of antenna's edge direction, its radiation mode all is a horizontal omnidirectional, therefore antenna is erected when using, the electric field of its formation and magnetic field intensity are suitable and maximum in level 360 degree, thereby realize the omnidirectional radiation of antenna.As shown in Figure 7, this antenna pattern has provided that antenna is under preferred forms among the application, and the radiation event in 360 degree scopes is the antenna of an omnidirectional radiation.
By above-mentioned execution mode as can be seen, the antenna among the application has the characteristics of ultra broadband, can cover the 470MHz-850MHz whole frequency fully; Characteristics with low section, complanation; Pattern characteristics with omnidirectional radiation; Characteristics with miniaturization, and miniaturization and the characteristics that are easy to make also make this antenna have characteristic cheaply.Because this antenna has these advantages, can use by dual mode in the Digital Television Terrestrial Broadcasting receiving system.One is installed on it on TV shell as accessory, is fixed in the side or the top of TV by anchor clamps; Its two, directly this miniature antenna is built in television set inside, use as the building block of TV.
The above only is the application's a preferred implementation, does not limit the application's scope with this, and all simple equivalent conversion and modifications of being done with the application's claim and description all should belong to the scope that the application covers.
Claims (8)
1. Digital Television Terrestrial Broadcasting antenna, it is characterized in that, comprise and have the upper surface that is parallel to each other and the medium substrate of a lower surface, be arranged at the first metal Department of Radiation of described upper surface, and be arranged at the second metal Department of Radiation of described lower surface, wherein, the described first metal Department of Radiation comprises that first planar metal plate that is positioned at described medium substrate top reaches in the vertical center line side of planar metal plate upwardly extending little band metal wire, described little band metal wire and described first planar metal plate have contact point, and become the obtuse angle angle with the edge of described first planar metal plate of contact point both sides, described first planar metal plate is provided with openwork part, the described second metal Department of Radiation is second planar metal plate that is positioned at described medium substrate bottom, and described second planar metal plate is provided with openwork part.
2. antenna as claimed in claim 1, it is characterized in that, the contact point of described little band metal wire and described first planar metal plate, projection on the vertical direction of described medium substrate, drop on outside described second planar metal plate, between described first planar metal plate and described second planar metal plate, to form coupling.
3. antenna as claimed in claim 2 is characterized in that, the openwork part that is provided with on described first planar metal plate is that 4 sizes are identical, regular geometry, and first hollow out of arranging in two row, the two row modes of symmetry.
4. antenna as claimed in claim 3, it is characterized in that, in described first hollow out first row hollow out, long 32mm, wide 16mm, the hollow out top edge is apart from metal top 40mm, about two hollow outs be in the 1.5mm place of described vertical center line respectively near the edge of the vertical center line of described first planar metal plate, the corner is that radius is the quadrant arc of 5mm; The long 32mm of the second row hollow out, wide 16mm, the hollow out top edge is apart from metal top 80mm, about two hollow outs be in the 1.5mm place of described vertical center line respectively near the edge of the vertical center line of described first planar metal plate, the corner is that radius is the quadrant arc of 5mm.
5. antenna as claimed in claim 2 is characterized in that, the openwork part that is provided with on described second planar metal plate is that 2 sizes are identical, has regular geometric shapes, and is second hollow out that symmetry axis is arranged with the vertical center line of described second planar metal plate.
6. antenna as claimed in claim 5, it is characterized in that, described second hollow out is combined by rectangle and two semicircles that are arranged on the rectangle both sides, and form a closed geometric shape, wherein, the edge of the vertical center line of close described second planar metal plate of rectangle is 30mm to the vertical range of described vertical center line, long 10mm, high 30mm, the right and left are that radius is the semicircle of 15mm, and the hollow out lower limb is apart from substrate lower edge 20mm.
7. antenna as claimed in claim 1 is characterized in that, the dielectric constant of described medium substrate is 4.4.
8. antenna as claimed in claim 1 is characterized in that, the covering frequence of described antenna is 470MHz-850MHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020000739XU CN201638938U (en) | 2010-01-13 | 2010-01-13 | Wide frequency-band flat and small-sized receiving antenna used for receiving of terrestrial broadcasting for digital television |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020000739XU CN201638938U (en) | 2010-01-13 | 2010-01-13 | Wide frequency-band flat and small-sized receiving antenna used for receiving of terrestrial broadcasting for digital television |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201638938U true CN201638938U (en) | 2010-11-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020000739XU Expired - Lifetime CN201638938U (en) | 2010-01-13 | 2010-01-13 | Wide frequency-band flat and small-sized receiving antenna used for receiving of terrestrial broadcasting for digital television |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201638938U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105932409A (en) * | 2016-05-05 | 2016-09-07 | 哈尔滨工程大学 | Miniaturized inverted-E-shaped groove type ultra wide band millimeter wave microstrip antenna |
-
2010
- 2010-01-13 CN CN201020000739XU patent/CN201638938U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105932409A (en) * | 2016-05-05 | 2016-09-07 | 哈尔滨工程大学 | Miniaturized inverted-E-shaped groove type ultra wide band millimeter wave microstrip antenna |
| CN105932409B (en) * | 2016-05-05 | 2018-07-24 | 哈尔滨工程大学 | One kind is small-sized to melt the type groove of falling E formula ultra wide band millimeter wave micro-strip antenna |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20101117 |