CN102005646A - Miniaturized broad-band antenna applied to WLAN (Wireless Local Area Network) - Google Patents
Miniaturized broad-band antenna applied to WLAN (Wireless Local Area Network) Download PDFInfo
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- CN102005646A CN102005646A CN2010105856388A CN201010585638A CN102005646A CN 102005646 A CN102005646 A CN 102005646A CN 2010105856388 A CN2010105856388 A CN 2010105856388A CN 201010585638 A CN201010585638 A CN 201010585638A CN 102005646 A CN102005646 A CN 102005646A
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Abstract
The invention relates to a miniaturized broad-band antenna applied to WLAN (Wireless Local Area Network), which belongs to the technical field of antennas. A radiation patch is arranged in the right upper position on the surface of a ceramic substrate, and the left side of the radiation patch is provided with an inverted L-shaped open slot; a signal input and output microstrip feeder is positioned at the lower edge of the surface of the ceramic substrate, and is connected with the lower left part of the radiation patch; an earth plate is positioned at the lower left corner of the surface of the ceramic substrate; a patch in a complementary structure with the radiation patch is positioned at the left side and the lower side of the back surface of the ceramic substrate, and the patch is formed by connecting a concave-shaped patch at the left side and a rectangular patch at the lower side; and an earth pin connects the patch in a complementary structure with the radiation patch and the earth plate by a through hole in the ceramic substrate. The miniaturized broad-band antenna is manufactured by adopting an LTCC (Low Temperature Co-Fired Ceramic) process, and has an ultra low profile and a very small size. On one hand, the effective length of a current path is increased by opening a slot on the radiation patch, thereby reducing the resonance frequency; and on the other hand, the band width is widened to a certain extent by using the patch in a complementary structure with the radiation patch.
Description
Technical field
The invention belongs to antenna technical field, relate to a kind of WLAN (wireless local area network) minimized wide-band antenna of (Wireless Local Area Network is called for short WLAN) that is applied to.
Background technology
In recent years, the continuous development of wireless communication system is had higher requirement to antenna.Tend to portable day by day as the personal communications terminal module: light, thin, short, little, therefore press for and develop miniaturization more and high performance antenna as transmitting-receiving subassembly.Improving constantly of WLAN popularity requires system module more and more littler, and this makes the antenna that occupies the most of size of system module must reduce size significantly.
Development along with antenna integrated technology, people are with LTCC (Low-temperature cofired ceramics in recent years, abbreviation LTCC) encapsulation technology has been applied in the integrated encapsulation research of antenna, antenna is inner or surperficial as for the LTCC circuit, obtain good antenna performance by suitable design.Band floor antenna is the which couple of screened shielded antanna and underfloor natively, yet because limited area and the ultralow section of radio-frequency front-end package carrier, band floor antenna Q value is higher, and this is with the raising of performances such as limiting bandwidth.For this reason, can be by suitable destruction floor integrality to reduce the bandwidth that technology such as Q value are come expansion bands floor electronically small antenna.Compact wideband antenna based on the LTCC technology has very big advantage compared to traditional antenna, as Chinese patent " the small-sized inverse-F antenna (patent No. ZL200920278382.9) of WLAN module ", designed a kind of small-sized inverse-F antenna that is used for wireless data transfer modules such as wireless local area network technology, yet in miniaturization integrated today of more and more popularizing, requirement to the minimized wide-band antenna is more and more higher, and bigger physical size and the height of the antenna in the foregoing invention certainly will influence its application in some system.At present, develop slowly relatively at home based on the antenna of LTCC technology, document and the patent and few based on the chip antenna of LTCC published especially are applied to the antenna of WLAN (wireless local area network), and its area surpasses 10mm*10mm mostly.Therefore, the minimized wide-band Antenna Design is important work and stern challenge.
Summary of the invention
In order further to improve the existing bandwidth of operation that is applied to the miniature antenna of WLAN, reduce its size, the invention provides the minimized wide-band antenna of a kind of WLAN of being applied to, this antenna has been broken through the size of traditional PCB antenna, has ultralow section and minimum profile; In addition, this antenna adopts LTCC technology, makes it to carry out the system in package design with the specific function active circuit better, forms modularization, becomes possibility thereby make it be used for portable set.
Purpose of the present invention is achieved through the following technical solutions:
A kind of minimized wide-band antenna that is applied to WLAN, as shown in Figures 1 to 4, complementary structure paster 5 and a ground connection pin 6 of comprising a square ceramic substrate 2, ground plate 1, signal input and output microstrip feed line 3, metal radiation patch 4, a metal radiation patch 4.The profile of metal radiation patch 4 is a rectangle, is positioned at square ceramic substrate 2 surperficial upper right positions, and the left side of metal radiation patch 4 has an inverted "L" shaped open slot.Signal input and output microstrip feed line 3 is positioned at square ceramic substrate 2 surperficial lower limbs, and links to each other with the following left part of metal radiation patch 4.Ground plate 1 be shaped as rectangle, be positioned at the square ceramic substrate 2 surperficial lower left corners.The complementary structure paster 5 of metal radiation patch 4 is positioned at the left side and the downside position at square ceramic substrate 2 back sides, is formed by connecting by " recessed " font metal patch in left side and a rectangular metal paster of downside.Ground connection pin 6 links together by the complementary structure paster 5 and the ground plate 1 of the through hole in the square ceramic substrate 2 with metal radiation patch 4.
Compared to prior art, the invention has the beneficial effects as follows:
The present invention is in the limited area that ceramic substrate determined, changed current path by the mode of on the metal radiation patch, slotting, increased the effective length of electric current road warp, thereby reduced the resonance frequency (also can be regarded as under the equal resonance frequency, size of the present invention can further reduce) of antenna; Owing to adopt the complementary structure paster of metal radiation patch, though be subjected to the restriction of antenna size, the broadening beamwidth of antenna to a certain extent; In addition, the present invention adopts LTCC technology to make, and makes it to carry out the system in package design with the specific function active circuit better, forms modularization, thereby makes it can be applied to portable WLAN communication equipment.
Description of drawings
Fig. 1 is the structural representation with transparent effect of the minimized wide-band antenna of the WLAN of being applied to provided by the invention.
Fig. 2 is the end view of the minimized wide-band antenna of the WLAN of being applied to provided by the invention.
Fig. 3 is the vertical view of the minimized wide-band antenna of the WLAN of being applied to provided by the invention.
Fig. 4 is the dorsal view of the minimized wide-band antenna of the WLAN of being applied to provided by the invention.
Fig. 5 is the reflection coefficient simulation curve figure of the minimized wide-band antenna of the WLAN of being applied to provided by the invention.
Fig. 6 is that the minimized wide-band antenna of the WLAN of being applied to provided by the invention is at the E of 5.93GHz face directional diagram.
Fig. 7 is that the minimized wide-band antenna of the WLAN of being applied to provided by the invention is at the H of 5.93GHz face directional diagram.
Embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail.
A kind of minimized wide-band antenna that is applied to WLAN, as shown in Figure 1, complementary structure paster 5 and a ground connection pin 6 of comprising a square ceramic substrate 2, ground plate 1, signal input and output microstrip feed line 3, metal radiation patch 4, a metal radiation patch 4.The profile of metal radiation patch 4 is a rectangle, is positioned at square ceramic substrate 2 surperficial upper right positions, and the left side of metal radiation patch 4 has " L " font open slot.Signal input and output microstrip feed line 3 is positioned at square ceramic substrate 2 surperficial lower limbs, and links to each other with the following left part of metal radiation patch 4.Ground plate 1 be shaped as rectangle, be positioned at the square ceramic substrate 2 surperficial lower left corners.The complementary structure paster 5 of metal radiation patch 4 is positioned at the left side and the downside position at square ceramic substrate 2 back sides, is formed by connecting by " recessed " font metal patch in left side and a rectangular metal paster of downside.Ground connection pin 6 links together by the complementary structure paster 5 and the ground plate 1 of the through hole in the square ceramic substrate 2 with metal radiation patch 4.
In the technique scheme, square ceramic substrate 2 is by stacked the forming of multilayer LTCC ceramic substrate, and the length of side is 8～16 millimeters, and thickness is 0.3～3.0 millimeter, and dielectric constant is 2～10; Metal radiation patch 4 length are 6～14 tip of a hair, and width is 4.5～9 millimeters; The horizontal component length of " L " font open slot in the metal radiation patch 4 is 2～4 millimeters, and width is 1～3 millimeter; The vertical component length of " L " font open slot in the metal radiation patch 4 is 2～5 millimeters, and width is 0.3～1 millimeter; The length of signal input and output microstrip feed line 3 is 0.5～1.5 millimeter, and width is 0.2～2.5 millimeter; The length of ground plate 1 is 3.1～6.2 millimeters, and width is 2.5～5 millimeters; " recessed " font metal patch length in left side is 6～14 millimeters in the complementary structure paster 5 of metal radiation patch 4, and width is 2.5～5 millimeters; Sunk part length in the complementary structure paster 5 of metal radiation patch 4 in " recessed " font metal patch in left side is 1～4 millimeter, and width is 0.5～2.5 millimeter; The rectangular metal patch length of downside is 5.0～11 millimeters in the complementary structure paster 5 of metal radiation patch 4, and width is 0.5～2 millimeter.
Fig. 5 to Fig. 7 is the performance simulation resolution chart of a kind of minimized wide-band antenna that is applied to WLAN specifically in technique scheme.Make this antenna by present mature LTCC circuit fabrication technology, relevant parameter is: square ceramic substrate 2 length of sides are 8 millimeters, and thickness is 1.2 millimeters, and dielectric constant is 5.9, and loss tangent is 0.002; Metal radiation patch 4 length are 7 tip of a hair, and width is 4.5 millimeters; The horizontal component length of " L " font open slot in the metal radiation patch 4 is 2.5 millimeters, and width is 2 millimeters; The vertical component length of " L " font open slot in the metal radiation patch 4 is 4 millimeters, and width is 0.5 millimeter; The length of signal input and output microstrip feed line 3 is 1.5 millimeters, and width is 1.5 millimeters; The length of ground plate 1 is 3.1 millimeters, and width is 2.5 millimeters; " recessed " font metal patch length in left side is 7 millimeters in the complementary structure paster 5 of metal radiation patch 4, and width is 3 millimeters; Sunk part length in the complementary structure paster 5 of metal radiation patch 4 in " recessed " font metal patch in left side is 3 millimeters, and width is 1.5 millimeters; The rectangular metal patch length of downside is 5 millimeters in the complementary structure paster 5 of metal radiation patch 4, and width is 1.5 millimeters.Fig. 5 is the reflection coefficient S11 figure that is obtained by the HFSS of 3 D electromagnetic simulation software emulation, as seen in 5.41GHz～6.22GHz scope, voltage standing wave ratio VSWR＜3, promptly S11＜-6dB, bandwidth reaches 810MHz, relative bandwidth is 13.9%.In 5.7GHz～6.1GHz scope, voltage standing wave ratio VSWR＜2, promptly S11＜-10dB, bandwidth reaches 400MHz.The total height of antenna is 1.2mm, has realized very little overall dimension and ultralow section, is more conducive to realize system in package with semiconductor chip or integrated circuit.Fig. 6 and Fig. 7 be respectively antenna at the E of resonance point 5.93GHz face and H face directional diagram, this antenna is omni-directional antenna and can obtains fabulous linear polarization in whole operating frequency range as seen from the figure, the gain of antenna is-3.5dBi.
The size of above each several part also can be selected other length for use according to different use frequency ranges, and such as amplifying in proportion or dwindling, this is conspicuous to persons skilled in the relevant art.
Claims (3)
1. minimized wide-band antenna that is applied to WLAN comprises the complementary structure paster (5) and a ground connection pin (6) of a square ceramic substrate (2), a ground plate (1), a signal input and output microstrip feed line (3), a metal radiation patch (4), a metal radiation patch (4); The profile of metal radiation patch (4) is a rectangle, is positioned at the surperficial upper right position of square ceramic substrate (2), and the left side of metal radiation patch (4) has an inverted "L" shaped open slot; Signal input and output microstrip feed line (3) is positioned at the surperficial lower limb of square ceramic substrate (2), and links to each other with the following left part of metal radiation patch (4); Ground plate (1) be shaped as rectangle, be positioned at the surperficial lower left corner of square ceramic substrate (2); The complementary structure paster (5) of metal radiation patch (4) is positioned at the left side and the downside position at square ceramic substrate (2) back side, is formed by connecting by " recessed " font metal patch in left side and a rectangular metal paster of downside; Ground connection pin (6) links together by the complementary structure paster (5) and the ground plate (1) of the through hole in the square ceramic substrate (2) with metal radiation patch (4).
2. the minimized wide-band antenna that is applied to WLAN according to claim 1 is characterized in that: square ceramic substrate (2) is by stacked the forming of multilayer LTCC ceramic substrate, and the length of side is 8～16 millimeters, and thickness is 0.3～3.0 millimeter, and dielectric constant is 2～10; Metal radiation patch (4) length is 6～14 tip of a hair, and width is 4.5～9 millimeters; The horizontal component length of " L " font open slot in the metal radiation patch (4) is 2～4 millimeters, and width is 1～3 millimeter; The vertical component length of " L " font open slot in the metal radiation patch (4) is 2～5 millimeters, and width is 0.3～1 millimeter; The length of signal input and output microstrip feed line (3) is 0.5～1.5 millimeter, and width is 0.2～2.5 millimeter; The length of ground plate (1) is 3.1～6.2 millimeters, and width is 2.5～5 millimeters; " recessed " font metal patch length in left side is 6～14 millimeters in the complementary structure paster (5) of metal radiation patch (4), and width is 2.5～5 millimeters; Sunk part length in the complementary structure paster (5) of metal radiation patch (4) in " recessed " font metal patch in left side is 1～4 millimeter, and width is 0.5～2.5 millimeter; The rectangular metal patch length of downside is 5.0～11 millimeters in the complementary structure paster (5) of metal radiation patch (4), and width is 0.5～2 millimeter.
3. the minimized wide-band antenna that is applied to WLAN according to claim 1 is characterized in that: square ceramic substrate (2) length of side is 8 millimeters, and thickness is 1.2 millimeters, and dielectric constant is 5.9, and loss tangent is 0.002; Metal radiation patch (4) length is 7 tip of a hair, and width is 4.5 millimeters; The horizontal component length of " L " font open slot in the metal radiation patch (4) is 2.5 millimeters, and width is 2 millimeters; The vertical component length of " L " font open slot in the metal radiation patch (4) is 4 millimeters, and width is 0.5 millimeter; The length of signal input and output microstrip feed line (3) is 1.5 millimeters, and width is 1.5 millimeters; The length of ground plate (1) is 3.1 millimeters, and width is 2.5 millimeters; " recessed " font metal patch length in left side is 7 millimeters in the complementary structure paster (5) of metal radiation patch (4), and width is 3 millimeters; Sunk part length in the complementary structure paster (5) of metal radiation patch (4) in " recessed " font metal patch in left side is 3 millimeters, and width is 1.5 millimeters; The rectangular metal patch length of downside is 5 millimeters in the complementary structure paster (5) of metal radiation patch (4), and width is 1.5 millimeters.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105856388A CN102005646A (en) | 2010-12-13 | 2010-12-13 | Miniaturized broad-band antenna applied to WLAN (Wireless Local Area Network) |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010105856388A CN102005646A (en) | 2010-12-13 | 2010-12-13 | Miniaturized broad-band antenna applied to WLAN (Wireless Local Area Network) |
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| CN102005646A true CN102005646A (en) | 2011-04-06 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102426656A (en) * | 2011-08-16 | 2012-04-25 | 中兴通讯股份有限公司 | Multi-antenna mobile phone data card capable of reducing specific absorption rate, and method of the same |
| CN105870611A (en) * | 2015-01-21 | 2016-08-17 | 冠捷投资有限公司 | Broadband microstrip antenna |
| CN112825388A (en) * | 2019-11-20 | 2021-05-21 | 三星电机株式会社 | Chip antenna module |
-
2010
- 2010-12-13 CN CN2010105856388A patent/CN102005646A/en active Pending
Non-Patent Citations (3)
| Title |
|---|
| J.MICHAEL JOHNSON,YAHYA RAHMAT-SAMII: "The Tab Monopole", 《IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION》 * |
| LU GUO ET. AL.: "A Miniature Quasi-Self-Complementary Antenna for UWB Applications", 《ASIA PACIFIC MICROWAVE CONFERENCE 2008》 * |
| 杨晓冬，陈彭，佟浩: "一种半U型开槽叠层宽带微带天线的设计", 《哈尔滨工程大学学报》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102426656A (en) * | 2011-08-16 | 2012-04-25 | 中兴通讯股份有限公司 | Multi-antenna mobile phone data card capable of reducing specific absorption rate, and method of the same |
| WO2012151903A1 (en) * | 2011-08-16 | 2012-11-15 | 中兴通讯股份有限公司 | Multi-antenna mobile phone data card and method for reducing specific absorption rate |
| US9137349B2 (en) | 2011-08-16 | 2015-09-15 | Zte Corporation | Multi-antenna mobile phone data card and method for reducing specific absorption rate |
| CN102426656B (en) * | 2011-08-16 | 2016-12-28 | 中兴通讯股份有限公司 | Reduce multiple antennas data in mobile phone card and the method for specific absorption rate |
| CN105870611A (en) * | 2015-01-21 | 2016-08-17 | 冠捷投资有限公司 | Broadband microstrip antenna |
| CN105870611B (en) * | 2015-01-21 | 2019-03-22 | 冠捷投资有限公司 | Broadband microstrip antenna |
| CN112825388A (en) * | 2019-11-20 | 2021-05-21 | 三星电机株式会社 | Chip antenna module |
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Application publication date: 20110406 |