CN1674354A - Double-frequency inverted F shape antenna - Google Patents
Double-frequency inverted F shape antenna Download PDFInfo
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- CN1674354A CN1674354A CN 200410030271 CN200410030271A CN1674354A CN 1674354 A CN1674354 A CN 1674354A CN 200410030271 CN200410030271 CN 200410030271 CN 200410030271 A CN200410030271 A CN 200410030271A CN 1674354 A CN1674354 A CN 1674354A
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- 239000002184 metal Substances 0.000 claims abstract description 159
- 229910052751 metal Inorganic materials 0.000 claims abstract description 159
- 230000005855 radiation Effects 0.000 claims abstract description 91
- 230000005540 biological transmission Effects 0.000 claims abstract description 14
- 239000004020 conductor Substances 0.000 claims description 17
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 2
- 239000010931 gold Substances 0.000 claims description 2
- 229910052737 gold Inorganic materials 0.000 claims description 2
- 230000009977 dual effect Effects 0.000 description 4
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
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Abstract
The present invention relates to a dual-frequency inverted-F antenna. It includes a grounding metal strip, a first radiation metal strip, a second radiation metal strip, a short-circuit metal arm and a feeding-in coaxial transmission line. Said invention also provides the concrete action of the above-mentioned every component, and also provides the connection mode of all the above-mentioned components. Said invention can utilize single path, and not only can cover wireless region network 2.4 GHz, but also can meet the requirement for covering all-band 5.2 and 5.8 GHz frequency band.
Description
[technical field]
The present invention system relates to a kind of double-frequency inverted F shape antenna (dual-bandinverted-Fshape antenna), particularly is applied to the double-frequency inverted F shape antenna on the radio communication product.
[background technology]
Along with the fast development of Wireless LAN (wireless local area network) in recent years, on the performance requirement of antenna, also improve gradually, not only require the downsizing of size, and must possess characteristics such as built-in, conformability and multiband are arranged, just have the market competitiveness.
Be applicable to the telecommunications product of Wireless LAN at present, the more existing inverted-F antenna of commonly using designs, this type of design is a single frequency operation in 2.4GHz frequency band or can dual frequency operation but only can contain 5.2 or one of them frequency band of 5.8GHz at 5GHz mostly, can't contain 2.4 and 5GHz full range band (comprise 5.2 and 5.8GHz frequency band) fully, and partly usually need two current paths cause dual-band operation at dual frequency operation, as United States Patent (USP) the 6th, 686, it disclosed is the inverted-F antenna structure that is built in a kind of in the notebook computer No. 886 " being applied to the integrated antenna (Integratedantenna for laptop applications) on the notebook computer ", and the design of integrating with the ground plane of screen, though this antenna has dual frequency operation (2.4/5.2GHz), but only can comprise the 5.2GHz frequency band at 5GHz, and its dual frequency operation must be formed by different current paths, has increased the complexity of circuit design.
[summary of the invention]
For solving foregoing problems, the object of the present invention is to provide a kind of double-frequency inverted F shape antenna, utilize a single-pathway, first (lower) resonance mode of this antenna and the current path of second (higher) resonance mode are provided, not only can contain Wireless LAN 2.4GHz frequency band at the frequency range of first (lower) resonance mode, and can produce one at second (higher) resonance mode and have the operation mode of wideband, contain 5GHz full range band 5.2 and 5.8GHz frequency band (comprise 5.2 and 5.8GHz frequency band).
A kind of double-frequency inverted F shape antenna of the present invention includes a grounded metal sheet, one first radiation sheet metal, one second radiation sheet metal, a short circuit metal arm and a feed-in coaxial transmission line, it is characterized in that:
This grounded metal sheet comprises a short dot and an earth point;
This first radiation sheet metal is positioned at one of this grounded metal sheet edge top and is parallel to the edge of this grounded metal sheet;
This second radiation sheet metal, be positioned at the edge top of this grounded metal sheet and perpendicular to the edge of this grounded metal sheet, its shape is trapezoidal shape, have a top, a base and dual-side and comprise a load point, this top is connected with this first radiation sheet metal, this load point is between this top and this base and be close to this base, and this dual-side then presss from both sides an inclination angle with this first radiation sheet metal respectively, is used to adjust the frequency ratio of first and second operational frequency bands of this antenna;
This short circuit metal arm between this first radiation sheet metal and this grounded metal sheet, is one L shaped, and the one end is connected to the base of this second radiation sheet metal, and the other end then is connected to the short dot of this grounded metal sheet;
This feed-in coaxial transmission line in order to transmission signal, includes a center conductor and an outer earthing conductor, and this center conductor is connected to the load point of this second radiation sheet metal; This skin earthing conductor is connected to the earth point of this grounded metal sheet.
Described double-frequency inverted F shape antenna is characterized in that: this first radiation sheet metal and this second radiation metal leaf length sum, and near 1/4 wavelength of the first lower operational frequency bands centre frequency of this antenna.
Described double-frequency inverted F shape antenna is characterized in that: this first radiation sheet metal and this second radiation metal leaf length sum, and near 1/2 wavelength of the second higher operational frequency bands centre frequency of this antenna.
Described double-frequency inverted F shape antenna, it is characterized in that: the length of this top of this second radiation sheet metal is greater than the length on this base.
Described double-frequency inverted F shape antenna is characterized in that: the length of this top of this second radiation sheet metal and the equal in length on this base.
Described double-frequency inverted F shape antenna, it is characterized in that: the length of the top of this second radiation sheet metal is less than the length on this base.
Described double-frequency inverted F shape antenna is characterized in that: this grounded metal sheet, this first radiation sheet metal, this second radiation sheet metal and this short circuit metal arm are made by the single sheet metal of a slice.
Described double-frequency inverted F shape antenna is characterized in that: this first radiation gold plaque, this second radiation sheet metal and this short circuit metal arm are to be formed on the microwave base plate.
In the present invention, the total path that this first radiation sheet metal and this second radiation sheet metal are formed, first (lower) resonance mode of this antenna and the current path of second (higher) resonance mode can be provided, through testing to such an extent that demonstrate,prove, its path total length is designed to be about 1/4 wavelength of this first resonance mode centre frequency and 1/2 wavelength of this second resonance mode centre frequency, can gets best signal reception.The present invention has following characteristic: can produce dual-band operation by adjusting the total length in its path, and utilize the length that changes this short circuit metal arm to obtain the good impedance match of two operational frequency bands.Simultaneously by adjusting length and the dual-side and the folded inclination angle of this first radiation sheet metal on limit and base on this second radiation sheet metal, the frequency ratio of fine-tuning this two resonance modes centre frequency reaches suitable first (lower) operational frequency bands and second (higher) operational frequency bands.By above-mentioned characteristic, can design the inverted-F antenna that is applicable to Wireless LAN 2.4GHz and comprises the dual-band operation of 5GHz full range band (comprise 5.2 and 5.8GHz frequency band).
[description of drawings]
Fig. 1 is one of double-frequency inverted F shape antenna of the present invention example structure figure.
Fig. 2 loses the empirical curve result for returning of antenna one embodiment of the present invention.
Fig. 3 is another example structure figure of double-frequency inverted F shape of the present invention sky wire antenna.
Fig. 4 is the another example structure figure of double-frequency inverted F shape of the present invention sky wire antenna.
[embodiment]
Be illustrated in figure 1 as the present invention's one of double-frequency inverted F shape antenna embodiment, the structure of double-frequency inverted F shape antenna 1 of the present invention includes members such as a grounded metal sheet 10, one first radiation sheet metal 11, one second radiation sheet metal 12, a short circuit metal arm 13 and a feed-in coaxial transmission line 14, wherein, this grounded metal sheet 10 in order to edge 103 that other members are connected near be provided with a short dot 101 and an earth point 102,101 of this short dots and short circuit metal arm 13 touch, and this earth point 102 then is to touch with outer earthing conductor 142; This first radiation sheet metal 11 is positioned at 103 tops, edge of this grounded metal sheet 10 and is roughly parallel to this edge 103; 12 of this second radiation sheet metals are positioned at 103 tops, edge of this grounded metal sheet 10 and are approximately perpendicular to the edge 103 of this grounded metal sheet 10, it is one trapezoidal that its shape is roughly, has a top 121, one base 122 and dual-side 123 and include a load point 124, wherein this top 121 is connected with this first radiation sheet metal 11, make this first radiation sheet metal 11 and this second radiation sheet metal 12 form a resonance path, be used to produce first (lower) and second (higher) operational frequency bands of this antenna, 124 of this load points are positioned at 122 side places, base, and this dual-side 123 then presss from both sides an inclination angle with this first radiation sheet metal 11 respectively; This short circuit metal arm 13, between this first radiation sheet metal 11 and this grounded metal sheet 10, its shape is roughly an inverted L shape, the one end is connected to the base 122 of this second radiation sheet metal 12, the other end then is connected to the short dot 101 of this grounded metal sheet 10, in order to this first radiation sheet metal 11 and this second radiation sheet metal 12 are electrically connected to this grounded metal sheet 10, and can adjust the impedance matching of first and second operational frequency bands of this antenna; In addition, 14 of this feed-in coaxial transmission lines are in order to transmission signal, and its structure has comprised a center conductor 141 and an outer earthing conductor 142, and wherein, this center conductor 141 is connected to the load point 124 of this second radiation sheet metal 12; This skin earthing conductor 142 is connected to this earth point 102 of this grounded metal sheet 10, so promptly finishes the entire antenna structure.
And in the present embodiment, the length of the top 121 of this second radiation sheet metal 12 is greater than the length on this base 122, make this dual-side 123 and this first radiation sheet metal 11 accompany one respectively near 90 degree and the inclinations angle less than 90 degree, can be used for adjusting the frequency ratio of first and second operational frequency bands of this antenna, to reach suitable Wireless LAN band system band requirement.This grounded metal sheet 10, this first radiation sheet metal 11, this second radiation sheet metal 12 and this short circuit metal arm 13 in the present embodiment can utilize single sheet metal punching press (stamping) or cutting (cutting) to be made simultaneously, or with this first radiation sheet metal 11, this second radiation sheet metal 12 and this short circuit metal arm 13 with the printing or etching mode be formed on the microwave base plate, be connected to this grounded metal sheet 10 again.
Fig. 2 returns the loss experimental result for one of antenna of the present invention embodiment's; Curve 21 is first (lower) operational frequency bands of this antenna among the figure, curve 22 is second (higher) operational frequency bands of this antenna, can obtain this embodiment by experimental result and return the definition of loss impedance frequency range down in 10dB, the frequency range of its first (lower) operational frequency bands 21 can satisfy the frequency band requirement of Wireless LAN system in 2.4GHz (2.4-2.5GHz), and the frequency range of second (higher) operational frequency bands 22 can satisfy the Wireless LAN system in 5GHz (5.15-5.35,5.725-5.875GHz) frequency band requirement.
Fig. 3 is the structure chart of another embodiment of antenna of the present invention, in this embodiment, and this grounded metal sheet 30, and near one edge 303, comprise a short dot 301 and an earth point 302; This first radiation sheet metal 31 is positioned at 303 tops, edge of this grounded metal sheet and is roughly parallel to the edge 303 of this grounded metal sheet; This second radiation sheet metal 32, be positioned at 303 tops, edge of this grounded metal sheet and be approximately perpendicular to the edge 303 of this grounded metal sheet, it is one trapezoidal that its shape is roughly, and has a top 321, one base 322 and dual-side 323 and comprise a load point 324, wherein this top 321 is connected with this first radiation sheet metal 31, make this first radiation sheet metal 31 and this second radiation sheet metal 32 form a resonance path, be used to produce first (lower) and second (higher) operational frequency bands of this antenna, 324 of this load points are between this top 321 and this base 322 and be close to this base 322, this dual-side 323 then respectively with this first radiation sheet metal, 31 folders, one inclination angle; One short circuit metal arm 33, between this first radiation sheet metal 31 and this grounded metal sheet 30, its shape is roughly an inverted L shape, the one end is connected to this base 322 of this second radiation sheet metal 32, the other end then is connected to this short dot 301 of this grounded metal sheet 30, in order to this first radiation sheet metal 31 and this second radiation sheet metal 32 are electrically connected to the impedance matching that grounded metal sheet 30 also can be adjusted this antenna; And a feed-in coaxial transmission line 34, in order to transmission signal, comprise: a center conductor 341 is connected to this load point 324 of this second radiation sheet metal 32; Reach an outer earthing conductor 342, be connected to this earth point 302 of this grounded metal sheet 30.
And in the present embodiment, the length of this top 321 of this second radiation sheet metal 32 is less than the length on this base 322, make this dual-side 323 and this first radiation sheet metal 31 accompany one respectively near 90 degree and the inclinations angle greater than 90 degree, can be used for adjusting the frequency ratio of first and second operational frequency bands of this antenna, to reach suitable Wireless LAN band system band requirement.
Fig. 4 is the structure chart of the another embodiment of antenna of the present invention, comprising: a grounded metal sheet 40, and near one edge 403, comprise a short dot 401 and an earth point 402; One first radiation sheet metal 41 is positioned at these 403 tops, edge of this grounded metal sheet and is roughly parallel to the edge 403 of this grounded metal sheet; One second radiation sheet metal 42, be positioned at 403 tops, edge of this grounded metal sheet and be approximately perpendicular to the edge 403 of this grounded metal sheet, it is one trapezoidal that its shape is roughly, and has a top 421, one base 422 and dual-side 423 and comprise a load point 424, wherein this top 421 is connected with this first radiation sheet metal 41, make this first radiation sheet metal 41 and this second radiation sheet metal 42 form a resonance path, be used to produce first (lower) and second (higher) operational frequency bands of this antenna, 424 of this load points are between this top 421 and this base 422 and be close to this base 422, this dual-side 423 then respectively with this first radiation sheet metal, 41 folders, one inclination angle; One short circuit metal arm 43, between this first radiation sheet metal 41 and this grounded metal sheet 40, its shape is roughly an inverted L shape, the one end is connected to this base 422 of this second radiation sheet metal 42, the other end then is connected to this short dot 401 of this grounded metal sheet 40, in order to this first radiation sheet metal 41 and this second radiation sheet metal 42 are electrically connected to the impedance matching that grounded metal sheet 40 also can be adjusted this antenna; And a feed-in coaxial transmission line 44, in order to transmission signal, comprise: a center conductor 441 is connected to this load point 424 of this second radiation sheet metal 42; Reach an outer earthing conductor 442, be connected to this earth point 402 of this grounded metal sheet 40.
And in the present embodiment, the length of this top 421 of this second radiation sheet metal 42 is greater than the length on this base 422, make this dual-side 423 and this first radiation sheet metal 41 press from both sides one respectively greater than 90 degree and the inclinations angle less than 90 degree, can be used for adjusting the frequency ratio of first and second operational frequency bands of this antenna, to reach suitable Wireless LAN band system band requirement.
More than only be explanation the present invention's principle and effect thereof at the embodiment described in the present invention explanation, and unrestricted the present invention.Therefore, the present invention can make amendment to the foregoing description in protection scope of the present invention and make the foregoing description do various variations.
Claims (8)
1. a double-frequency inverted F shape antenna includes a grounded metal sheet, one first radiation sheet metal, one second radiation sheet metal, a short circuit metal arm and a feed-in coaxial transmission line, it is characterized in that:
This grounded metal sheet comprises a short dot and an earth point;
This first radiation sheet metal is positioned at one of this grounded metal sheet edge top and is parallel to the edge of this grounded metal sheet;
This second radiation sheet metal, be positioned at the edge top of this grounded metal sheet and perpendicular to the edge of this grounded metal sheet, its shape is trapezoidal shape, have a top, a base and dual-side and comprise a load point, this top is connected with this first radiation sheet metal, this load point is between this top and this base and be close to this base, and this dual-side then presss from both sides an inclination angle with this first radiation sheet metal respectively;
This short circuit metal arm between this first radiation sheet metal and this grounded metal sheet, is one L shaped, and the one end is connected to the base of this second radiation sheet metal, and the other end then is connected to the short dot of this grounded metal sheet;
This feed-in coaxial transmission line in order to transmission signal, includes a center conductor and an outer earthing conductor, and this center conductor is connected to the load point of this second radiation sheet metal; This skin earthing conductor is connected to the earth point of this grounded metal sheet.
2. double-frequency inverted F shape antenna as claimed in claim 1 is characterized in that: this first radiation sheet metal and this second radiation metal leaf length sum, and near 1/4 wavelength of the first lower operational frequency bands centre frequency of this antenna.
3. double-frequency inverted F shape antenna as claimed in claim 1 is characterized in that: this first radiation sheet metal and this second radiation metal leaf length sum, and near 1/2 wavelength of the second higher operational frequency bands centre frequency of this antenna.
4. double-frequency inverted F shape antenna as claimed in claim 1, it is characterized in that: the length of this top of this second radiation sheet metal is greater than the length on this base.
5. double-frequency inverted F shape antenna as claimed in claim 1 is characterized in that: the length of this top of this second radiation sheet metal and the equal in length on this base.
6. double-frequency inverted F shape antenna as claimed in claim 1, it is characterized in that: the length of the top of this second radiation sheet metal is less than the length on this base.
7. double-frequency inverted F shape antenna as claimed in claim 1 is characterized in that: this grounded metal sheet, this first radiation sheet metal, this second radiation sheet metal and this short circuit metal arm are made by the single sheet metal of a slice.
8. double-frequency inverted F shape antenna as claimed in claim 1 is characterized in that: this first radiation gold plaque, this second radiation sheet metal and this short circuit metal arm are to be formed on the microwave base plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100302718A CN100391050C (en) | 2004-03-23 | 2004-03-23 | Double-frequency inverted F shape antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100302718A CN100391050C (en) | 2004-03-23 | 2004-03-23 | Double-frequency inverted F shape antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1674354A true CN1674354A (en) | 2005-09-28 |
| CN100391050C CN100391050C (en) | 2008-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2004100302718A Expired - Lifetime CN100391050C (en) | 2004-03-23 | 2004-03-23 | Double-frequency inverted F shape antenna |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102340058A (en) * | 2010-07-21 | 2012-02-01 | 神讯电脑(昆山)有限公司 | Antenna structure |
| CN101170218B (en) * | 2006-10-26 | 2012-05-09 | 连展科技电子（昆山）有限公司 | Coupling multi-frequency antenna |
| CN102569998A (en) * | 2010-12-20 | 2012-07-11 | 广达电脑股份有限公司 | multi-frequency antenna |
| CN101459284B (en) * | 2007-12-11 | 2013-01-02 | 索尼株式会社 | Antenna device |
| CN101471491B (en) * | 2007-12-24 | 2013-01-02 | 佳世达科技股份有限公司 | Antenna apparatus and relevant electronic device thereof |
| CN103367889A (en) * | 2012-04-10 | 2013-10-23 | 刘智佳 | Label-antenna production process |
| US9130267B2 (en) | 2007-03-30 | 2015-09-08 | Fractus, S.A. | Wireless device including a multiband antenna system |
| CN106684576A (en) * | 2016-12-28 | 2017-05-17 | 北京安拓思科技有限责任公司 | Mini-size circularly polarized antenna |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08307143A (en) * | 1995-05-08 | 1996-11-22 | Matsushita Electric Ind Co Ltd | Plate shaped inverted-f antenna |
| JP3630622B2 (en) * | 2000-08-31 | 2005-03-16 | シャープ株式会社 | Pattern antenna and wireless communication apparatus including the same |
| JP3958110B2 (en) * | 2001-06-01 | 2007-08-15 | 松下電器産業株式会社 | Inverted F-type antenna device and portable radio communication device |
| JP2003158419A (en) * | 2001-09-07 | 2003-05-30 | Tdk Corp | Inverted f antenna, and its feeding method and its antenna adjusting method |
| CN2593384Y (en) * | 2002-12-04 | 2003-12-17 | 富士康(昆山)电脑接插件有限公司 | Multi-frequency antenna |
| CN2705900Y (en) * | 2004-03-24 | 2005-06-22 | 连展科技（深圳）有限公司 | Double frequency inversed F antenna |
-
2004
- 2004-03-23 CN CNB2004100302718A patent/CN100391050C/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101170218B (en) * | 2006-10-26 | 2012-05-09 | 连展科技电子（昆山）有限公司 | Coupling multi-frequency antenna |
| US9130267B2 (en) | 2007-03-30 | 2015-09-08 | Fractus, S.A. | Wireless device including a multiband antenna system |
| US10476134B2 (en) | 2007-03-30 | 2019-11-12 | Fractus, S.A. | Wireless device including a multiband antenna system |
| US11145955B2 (en) | 2007-03-30 | 2021-10-12 | Ignion, S.L. | Wireless device including a multiband antenna system |
| CN101459284B (en) * | 2007-12-11 | 2013-01-02 | 索尼株式会社 | Antenna device |
| CN101471491B (en) * | 2007-12-24 | 2013-01-02 | 佳世达科技股份有限公司 | Antenna apparatus and relevant electronic device thereof |
| CN102340058A (en) * | 2010-07-21 | 2012-02-01 | 神讯电脑(昆山)有限公司 | Antenna structure |
| CN102340058B (en) * | 2010-07-21 | 2015-11-25 | 神讯电脑(昆山)有限公司 | Antenna structure |
| CN102569998A (en) * | 2010-12-20 | 2012-07-11 | 广达电脑股份有限公司 | multi-frequency antenna |
| CN102569998B (en) * | 2010-12-20 | 2014-12-31 | 广达电脑股份有限公司 | Multi-frequency antenna |
| CN103367889A (en) * | 2012-04-10 | 2013-10-23 | 刘智佳 | Label-antenna production process |
| CN106684576A (en) * | 2016-12-28 | 2017-05-17 | 北京安拓思科技有限责任公司 | Mini-size circularly polarized antenna |
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| Publication number | Publication date |
|---|---|
| CN100391050C (en) | 2008-05-28 |
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