CN102244318A - Multi-frequency antenna - Google Patents
Multi-frequency antenna Download PDFInfo
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- CN102244318A CN102244318A CN2010101701960A CN201010170196A CN102244318A CN 102244318 A CN102244318 A CN 102244318A CN 2010101701960 A CN2010101701960 A CN 2010101701960A CN 201010170196 A CN201010170196 A CN 201010170196A CN 102244318 A CN102244318 A CN 102244318A
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- arm
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Abstract
The invention relates to a multi-frequency antenna which comprises a grounding metal sheet with an edge and a grounding point, a radiating metal sheet located above the grounding metal sheet, a short-circuit metal arm located between the radiating metal sheet and the grounding metal sheet and a coaxial transmission line used for transmitting signals and comprising a central conducting line and an outer grounding conductor, wherein the radiating metal sheet works at a first working frequency band and is connected with the metal arm to work at a second working frequency band; one end of the short-circuit metal arm is connected to one end of the radiating metal sheet, and the other end of the short-circuit metal arm is connected to a short-circuit point at the edge; the central conducting line is connected to the radiating metal sheet or the short-circuit metal arm, and the outer grounding conductor is connected to the grounding point; and a capacitor is also arranged between the radiating metal sheet and the short-circuit metal arm. The multi-frequency antenna provided by the invention has the advantages of convenience for adjustment of working frequency bands, small size, simple structure and cost saving.
Description
[technical field]
The present invention relates to a kind of multifrequency antenna, relate in particular to a kind of multifrequency antenna that is applied on the mobile electronic device.
[background technology]
Along with the fast development of wireless network in recent years, on the performance requirement of antenna, also improve gradually, the built-in downsizing of integrating in the electronic equipment that not only requires size, and must possess characteristics such as built-in, conformability and multiband are arranged, the market competitiveness just had.
Be applicable to the telecommunications product of wireless network at present, more existing double-frequency inverted F shape Antenna Design commonly used, these antenna generally includes one first radiation arm, one second radiation arm, one short circuit metal arm, one ground strip and a feeder line, wherein first radiation arm and second radiation arm connect this short circuit metal arm in an end and extend to both sides in opposite direction, the other end of this short circuit metal arm connects this ground strip, feeder line connects the feedback point that is positioned on this short circuit metal arm, and signal imports in this feedback point and makes this first radiation arm and second radiation arm realize first, second working band.Yet such antenna size is bigger, and in case after designing, working band just is fixed, just must redesign antenna, cost of idleness if change frequency band.
Therefore, be necessary to provide a kind of multifrequency antenna that overcomes the problems referred to above.
[summary of the invention]
Main purpose of the present invention is to provide a kind of adjustable full employment frequency band and undersized multifrequency antenna.
For achieving the above object, the present invention adopts following technical scheme: a kind of multifrequency antenna, it comprise grounded metal sheet with an edge and an earth point, the radiation sheet metal above the grounded metal sheet, between described radiation sheet metal and grounded metal sheet the short circuit metal arm and in order to transmission signals and comprise center conductor and the coaxial transmission line of outer earthing conductor.Described radiation sheet metal works in first working band, connects metal arm and works in second working band.Described short circuit metal arm one end is connected to an end of radiation sheet metal, and the other end is connected to the short dot that is positioned at described edge.Described center conductor is connected to radiation sheet metal or short circuit metal arm, and outer earthing conductor is connected to earth point.Also be provided with a capacitor between radiation sheet metal and the short circuit metal arm.
For achieving the above object, the present invention also can adopt following technical scheme: a kind of multifrequency antenna, it comprise grounded metal sheet, be provided with at interval and have first radiation arm that is parallel to grounded metal sheet with grounded metal sheet and perpendicular to the radiation sheet metal of second radiation arm of grounded metal sheet, be connected the short circuit metal arm of second radiation arm and grounded metal sheet.The short circuit metal arm comprises first support arm of vertical connection second radiation arm one end, L shaped second support arm that connects the first support arm other end and L shaped the 3rd support arm that connects second support arm and grounded metal sheet.Described multifrequency antenna also comprises the variable capacitor between second radiation arm and the 3rd support arm.
Compared with prior art, it is convenient that multifrequency antenna of the present invention is adjusted working band, and size is little, simple in structure and saving cost.
[description of drawings]
Fig. 1 is the three-dimensional combination figure of multifrequency antenna of the present invention.
Fig. 2 is the partial enlarged drawing of the capacitor of multifrequency antenna of the present invention.
Fig. 3 is the test record figure of the voltage standing wave ratio frequency function of multifrequency antenna of the present invention.
[embodiment]
As shown in Figures 1 and 2, multifrequency antenna 1 of the present invention comprise grounded metal sheet 10, above the grounded metal sheet 10 and with it at interval radiation sheet metal 11, the short circuit metal arm 12 between grounded metal sheet 10 and the radiation sheet metal 11, between radiation sheet metal 11 and short circuit metal arm 12 capacitor 13, with the department of assembly 14 and the coaxial transmission line 15 of described radiation sheet metal 11 and the 12 interval settings of short circuit metal arm.
Grounded metal sheet 10 is an elongated metal sheet, and it has an edge 101 and an earth point 103, and edge 101 is provided with a short dot 102, and short circuit metal arm 12 extends vertically upward from this short dot 102.Radiation sheet metal 11 extends and comprises first radiation arm 111 that is parallel to grounded metal sheet 10 and be positioned at first radiation arm, 111 belows and be positioned at conplane second radiation arm 112 with short circuit metal arm 12 from the other end of short circuit metal arm 12, first radiation arm 111, second radiation arm 112 is vertical mutually and be rectangular metal sheet, second radiation arm 112 be shorter in length than first radiation arm 111.Short circuit metal arm 13 is one to be step-like sheet metal, it comprises that rectangle first support arm 121 of vertical connection second radiation arm 112 and vertical L shaped the 3rd support arm 123, the three support arms 123 other ends that connect L shaped second support arm 122 of first support arm 121 and vertically connect second support arm 122 vertically connect short dot 102.First support arm 121 is provided with a load point 124, and load point 124 can also be located on the radiation metal arm 11.Second support arm 122 comprises second arm 1222 that the first arm 1221 of vertical connection first support arm 121 reaches perpendicular to the first arm 1221.The 3rd support arm 123 comprises the 3rd arm 1231 of described second arm 1222 of vertical connection and the 4th arm 1232 that vertically connects the 3rd arm 1231, the 4th arm 1232 other ends connect short dot 102, and the first arm 1221, the 3rd arm 1231 all are parallel to second radiation arm 112.The 3rd arm 1231 common gaps 16 that form of second radiation arm 112, first support arm 121, second support arm 122 and the 3rd support arm 123.In present embodiment, capacitor 13 is a variable capacitor, and the one end connects the free terminal of second radiation arm 112, and the other end is connected to the 3rd arm 1231 of the 3rd support arm 123.But in other embodiments, capacitor 13 also can change its position as required, for example move along second radiation arm 112, and capacitor 13 also can be other capacitance component.Department of assembly 14 comprises from the support portion 141 that grounded metal sheet 10 1 ends extend vertically upward and self-supporting portion 141 another terminal vertical latch part 142 of a circular location hole of extending laterally and have.Latch part 142 is used for multifrequency antenna 1 is assembled to electronic equipment.Coaxial transmission line 15 is in order to transmission signals, the outer earthing conductor 152 that it comprises the center conductor 151 that is connected to the load point 124 that is positioned at radiation sheet metal 11 or short circuit metal arm 12 and is connected to the earth point 103 of grounded metal sheet 10.
As shown in Figure 3, the capacitance for capacitor 13 is respectively 0pF, 1.0pF, the voltage standing wave ratio figure of multifrequency antenna 1 of the present invention during 2.0pF.Radiation sheet metal 11 works in low first working band, short circuit metal arm 12 works in higher second working band, and when capacitor 13 increases to 1.0pF by 0pF, first working band is offset left, when capacitor 13 continues to increase to 2.0pF, first, second working band is skew left all, design like this, then can dwindle the size of radiation sheet metal 11, and according to different demands, adjust first, second working band by the value of adjusting capacitor 13, provide cost savings and the device space.
In the present embodiment, grounded metal sheet 10, radiation sheet metal 11 and short circuit metal arm 12 can utilize single sheet metal punching press (stamping) or cutting (cutting) to be made, or this radiation sheet metal 11 and short circuit metal arm 12 be formed on the microwave base plate with printing or etching mode, be connected to grounded metal sheet 10 again.Capacitor 13 is welded on the 3rd arm 1231 of second radiation arm 112 and short circuit metal arm 12, perhaps is fixed on the multifrequency antenna 1 by alternate manners such as snap close, screws.
Claims (10)
1. multifrequency antenna, it comprises the grounded metal sheet with an edge and an earth point, be positioned at the radiation sheet metal of grounded metal sheet top, short circuit metal arm between described radiation sheet metal and grounded metal sheet and in order to transmission signals and comprise center conductor and the coaxial transmission line of outer earthing conductor, it is characterized in that: described radiation sheet metal works in first working band, described connection metal arm works in second working band, described short circuit metal arm one end is connected to an end of radiation sheet metal, the other end is connected to the short dot that is positioned at described edge, described center conductor is connected to radiation sheet metal or short circuit metal arm, outer earthing conductor is connected to earth point, also is provided with a capacitor between described radiation sheet metal and the short circuit metal arm.
2. multifrequency antenna as claimed in claim 1, it is characterized in that: described radiation sheet metal comprises first radiation arm that is parallel to grounded metal sheet and is positioned at conplane second radiation arm with the short circuit metal arm, first radiation arm is vertical mutually with second radiation arm and be rectangular metal sheet, and second radiation arm is shorter in length than first radiation arm.
3. multifrequency antenna as claimed in claim 2, it is characterized in that: described short circuit metal arm is stairstepping, it comprises rectangle first support arm of vertical connection second radiation arm, L shaped second support arm and L shaped the 3rd support arm, described second support arm comprises the horizontally extending the first arm of vertical connection first support arm and second arm that vertically extends, the first arm and the second arm coplane and vertical mutually, described the 3rd support arm comprises the 3rd arm of described second arm of vertical connection and the 4th arm that vertically connects the 3rd arm, and the described short dot of the vertical connection of the 4th arm other end.
4. multifrequency antenna as claimed in claim 3 is characterized in that: described capacitor is a variable capacitor, and the one end is welded in the free terminal of described second radiation arm, and the other end is welded in the 3rd arm of described connection metal arm.
5. multifrequency antenna as claimed in claim 4 is characterized in that: first support arm of described short circuit metal arm is provided with a load point, and described first working band is lower than second working band.
6. as claim 1 or 5 described multifrequency antennas, it is characterized in that: described grounded metal sheet, radiation sheet metal and short circuit metal arm are made by a single sheet metal punching press or cutting.
7. as claim 1 or 5 described multifrequency antennas, it is characterized in that: described radiation sheet metal and short circuit metal arm are formed on the microwave base plate by printing or etching technique.
8. multifrequency antenna, it comprises grounded metal sheet, be provided with at interval with grounded metal sheet and have first radiation arm that is parallel to grounded metal sheet and perpendicular to the radiation sheet metal of second radiation arm of grounded metal sheet, the short circuit metal arm that connects second radiation arm and grounded metal sheet, it is characterized in that: described short circuit metal arm comprises first support arm of vertical connection second radiation arm one end, L shaped the 3rd support arm that connects L shaped second support arm of the first support arm other end and connect second support arm and grounded metal sheet, described multifrequency antenna also comprises the variable capacitor between second radiation arm and the 3rd support arm.
9. multifrequency antenna as claimed in claim 8, it is characterized in that: described second support arm has the first arm that is parallel to second radiation arm and perpendicular to second arm of the first arm, and the 3rd support arm has the 3rd arm that is parallel to second radiation arm and perpendicular to the 4th arm of the 3rd arm.
10. multifrequency antenna as claimed in claim 9 is characterized in that: described second Department of Radiation be connected metal arm and be positioned at same plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101701960A CN102244318A (en) | 2010-05-12 | 2010-05-12 | Multi-frequency antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101701960A CN102244318A (en) | 2010-05-12 | 2010-05-12 | Multi-frequency antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102244318A true CN102244318A (en) | 2011-11-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101701960A Pending CN102244318A (en) | 2010-05-12 | 2010-05-12 | Multi-frequency antenna |
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| Country | Link |
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| CN (1) | CN102244318A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102610903A (en) * | 2012-03-30 | 2012-07-25 | 哈尔滨工业大学 | Power-splitting broadband omnidirectional radiation antenna |
| CN103682589A (en) * | 2012-09-19 | 2014-03-26 | 智邦科技股份有限公司 | Antenna structure |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050168384A1 (en) * | 2004-01-30 | 2005-08-04 | Yageo Corporation | Dual-band inverted-F antenna with shorted parasitic elements |
| CN101106213A (en) * | 2006-07-14 | 2008-01-16 | 富士康(昆山)电脑接插件有限公司 | Multi-frequency antenna |
-
2010
- 2010-05-12 CN CN2010101701960A patent/CN102244318A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050168384A1 (en) * | 2004-01-30 | 2005-08-04 | Yageo Corporation | Dual-band inverted-F antenna with shorted parasitic elements |
| CN101106213A (en) * | 2006-07-14 | 2008-01-16 | 富士康(昆山)电脑接插件有限公司 | Multi-frequency antenna |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102610903A (en) * | 2012-03-30 | 2012-07-25 | 哈尔滨工业大学 | Power-splitting broadband omnidirectional radiation antenna |
| CN102610903B (en) * | 2012-03-30 | 2014-02-19 | 哈尔滨工业大学 | Power-splitting broadband omnidirectional radiation antenna |
| CN103682589A (en) * | 2012-09-19 | 2014-03-26 | 智邦科技股份有限公司 | Antenna structure |
| CN103682589B (en) * | 2012-09-19 | 2016-05-11 | 智邦科技股份有限公司 | Antenna structure |
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| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20111116 |