CN102176541A - Three-frequency channel microstrip antenna used in wireless local area network - Google Patents
Three-frequency channel microstrip antenna used in wireless local area network Download PDFInfo
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- CN102176541A CN102176541A CN2011100595600A CN201110059560A CN102176541A CN 102176541 A CN102176541 A CN 102176541A CN 2011100595600 A CN2011100595600 A CN 2011100595600A CN 201110059560 A CN201110059560 A CN 201110059560A CN 102176541 A CN102176541 A CN 102176541A
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Abstract
The invention relates to a three-frequency channel microstrip antenna used in wireless local area network, which belongs to the wireless technology field. The invention comprises a microstrip feed line (1), left side metal bands (2,7,8),right side metal bands (3,5,6),a dielectric plate (4) and a metal ground (9), wherein: a. the dielectric plate (4) is a piece of rectangular printed circuit board; b. a radiating antenna unit comprises two crooked metal bands which are longitudinally distributed above the back surface of the printed circuit board; c. the microstrip feeder( (1),the only one piece, is longitudinally clung to the front surface of the printed circuit board; d. the metal ground (9) is positioned on the back surface of the printed circuit board, and simulates the part of mobile terminal of wireless communication system except antenna.. The invention has the characteristics of compact structure, easy integration, wide waveband, multiple frequency range, being suitable for mobile communication terminal, in particular for multi- frequency channel antenna structure of a minisize mobile terminal, furthermore, the invention adopts common circuit manufacturing process, so the manufacturing process is simple and the cost is low.
Description
Technical field:
The present invention relates to a kind of three band microstrip antennas that are applied to WLAN (wireless local area network), belong to wireless technical field.
Background technology:
Along with people increase day by day to the high speed wireless data transmission requirements, the contradiction of frequency spectrum resource deficiency is increasingly sharpened, so this has excited people to effectively utilizing the research interest of frequency spectrum resource greatly.In WLAN (wireless local area network), the microstrip antenna of exploitation multiband can effectively utilize the frequency spectrum resource in the communication environments, improves the transmission rate and the operating efficiency of system.
In the modern wireless communication systems, multiband aerial has become in the circuit element most important one, and has caused extensive concern.In order to satisfy IEEE 802.11WLAN communication standard, designed antenna need cover 2.4/5.2/5.8GHz (2.4-2.484GHz, 5.15-5.35GHz, 5.725-5.825GHz) three frequency ranges, the antenna of multiband need possess following characteristics simultaneously: low cost, size is little, easily makes high-performance.
The one-segment antenna form of WLAN terminal is a lot, but the multiband aerial structure that is applicable to WLAN terminal seldom.Existing one-segment antenna structure mainly concentrates on the working range of 2.4-2.484GHz, and dual-band antenna mainly concentrates on two frequency ranges of 2.4/5.2GHz, and adopts the antenna of three frequency ranges scarcely to be beneficial to the system integration.
For mobile terminal of wireless local area network, if adopt multi-antenna structure to realize multiband, then the mutual coupling meeting between the antenna reduces the operating efficiency of antenna, thereby reduces capability of communication system.Therefore, if can design compact conformation, easy of integration, broadband and be applicable to the multiband single antenna construction of WLAN terminal, will make the multiband aerial technology be applied to WLAN terminal becomes possibility.
Summary of the invention:
The objective of the invention is to overcome the deficiency that adopts the performance of one-segment antenna under the complicated wireless multipath propagation environment in the existing WLAN terminal, a kind of three band microstrip antennas that are applied to WLAN (wireless local area network) are provided.
The present invention realizes that by the metal tape of two curved way on the dielectric-slab three frequency ranges of WLAN (wireless local area network) cover.The present invention adopts planar structure, and it is integrated that antenna and communication system are easy to; Adopt common printed circuit board manufacturing process, make the antenna cost very low.
The present invention is applied to three band microstrip antennas of WLAN (wireless local area network), comprises microstrip feed line (1), left side metal tape (2,7,8), right side metal tape (3,5,6), dielectric-slab (4), metal ground (9); Wherein:
A. dielectric-slab (4) is rectangular, is a double-sided copper-clad dielectric-slab;
B. the radiating antenna unit comprises left side metal tape (2,7,8) and right side metal tape (3,5,6), is distributed in the front upside of described dielectric-slab;
C. microstrip feed line (1), is close to the front of described medium substrate by totally one;
D. metal ground (9) are positioned at described medium substrate back underside.
The present invention is the three band microstrip antennas that are applied to WLAN (wireless local area network), wherein:
A. microstrip feed line (1) is parallel with metal ground (9); It is cut that the size on metal ground and medium substrate (4) size are compared part;
B. the radiating antenna unit is parallel to above-mentioned metal ground (9), and has two open ends; Two open ends of radiating antenna unit and the length between the feed place are ± quarter-wave; And interval different distance between the two-way metal tape, bending direction is also inequality.
The present invention is the three band microstrip antennas that are applied to WLAN (wireless local area network), and the position of microstrip feed line (1) is in a side of bending metals band, and feeding classification is an asymmetric manner, can obtain the bandwidth of operation of three frequency ranges.
The present invention has compact conformation, easy of integration, broadband, multiband, is applicable to the particularly characteristics of the multiband aerial structure of small size portable terminal of mobile communication terminal, and adopts common circuit manufacturing process, and manufacturing process is simple, and cost is low.
Description of drawings:
Fig. 1 is the tomograph that the present invention " is applied to three band microstrip antennas of WLAN (wireless local area network) ".
Fig. 2 is longitudinal sectional drawing for the A of Fig. 1 to view.
Fig. 3 is the structure chart (solid line partly is the projection of PCB back metal earth construction on this face among the figure) of antenna element and feeder line for the B of Fig. 1 to view.
Fig. 4 is the structure chart (dotted portion is cut metal earth construction among the figure) on metal ground for the C of Fig. 1 to view.
Fig. 5 is the embodiment dimensional drawing (B is to view) of antenna of the present invention, and unit is millimeter (mm) (solid box partly is the projection of back metal ground on this face among the figure, and frame of broken lines is the edge of dielectric-slab).
Fig. 6 is S parameter (return loss) figure of the measurement of Fig. 2, Fig. 3, Fig. 4 embodiment antenna element, and wherein S11 is a return loss.
Fig. 7 connects 2.442GHz (centre frequency of WLAN2.4GHz frequency range) when excitation, the software emulation gain pattern of the antenna element of the embodiment of Fig. 2, Fig. 3, Fig. 4 for antenna element: (a) be the x-z plane the power gain directional diagram (
: φ component power gain directional diagram;
: θ component power gain directional diagram), (b) be the y-z plane the power gain directional diagram (
: φ component power gain directional diagram;
: θ component power gain directional diagram).
Fig. 8 connects 5.25GHz (centre frequency of WLAN5.2GHz frequency range) when excitation, the software emulation gain pattern of the antenna element of the embodiment of Fig. 2, Fig. 3, Fig. 4 for antenna element: (a) be the x-z plane the power gain directional diagram (
: φ component power gain directional diagram;
: θ component power gain directional diagram), (b) be the y-z plane the power gain directional diagram (
: φ component power gain directional diagram;
: θ component power gain directional diagram).
Fig. 9 connects 5.775GHz (centre frequency of WLAN5.8GHz frequency range) when excitation, the software emulation gain pattern of the antenna element of the embodiment of Fig. 2, Fig. 3, Fig. 4 for antenna element: (a) be the x-z plane the power gain directional diagram (
: φ component power gain directional diagram;
: θ component power gain directional diagram), (b) be the y-z plane the power gain directional diagram (
: φ component power gain directional diagram;
: θ component power gain directional diagram).
Sequence number explanation in the accompanying drawing:
1 is microstrip feed line, and 2,3,5,6,7 and 8 is metal tape, and 4 is dielectric-slab, and 9 is metal ground.
Embodiment:
The three band microstrip antennas that are applied to WLAN (wireless local area network) of the present invention, its three-dimensional structure schematic diagram as shown in Figure 1.The entire antenna structure is printed on two faces of circuit board, comprises microstrip feed line 1, left side metal tape 2,7,8, right side metal tape 3,5,6, dielectric-slab 4, metal ground 9.
The metal tape of two bendings of the present invention is positioned at the centre of the front upper of printed circuit board (PCB), the size difference.The metal tape of two bendings is by carrying out feed across above it microstrip line (impedance should be 50 ohm).The width of regulating metal tape 5 can play regulates coupling, increases the effect of bandwidth.Metal ground 9 is positioned at the back side of printed circuit board (PCB), is used for analog wireless communication system and mobile terminal other parts except that antenna.
Technical scheme of the present invention is achieved in that at first antenna element is 1/4 wave resonance pattern, therefore can choose suitable antenna element size according to working frequency range; The spacing of adjusting the two-way metal tape is then regulated the coupling between the two-way metal tape; At last the size of two-way metal tape is carried out certain adjustment and co-design to meet design requirement.
For a kind of performance that is applied to three band microstrip antennas of WLAN (wireless local area network) provided by the invention is described, provide an instantiation below.
In this example, adopting dielectric substrate 4 thickness is that 1.6mm, relative dielectric constant are 4.4, the each several part size as shown in Figure 5, the unit of all sizes is millimeter (mm) among the figure.
With the unit reflection coefficient S11 of the plane tri-band antenna system of size shown in Figure 5 actual measurement as shown in Figure 6.Find out by Fig. 6, antenna element-10dB impedance frequency band is AB (2.36～2.96GHz) and CD (4.16～6.02GHz).In addition, Fig. 7, Fig. 8, Fig. 9 are the power gain directional diagram of the antenna element of software emulation, wherein, power gain directional diagram when Fig. 7 is operated in 2.442GHz for antenna, Fig. 8 and Fig. 9 are respectively the power gain directional diagram of antenna when being operated in 5.25GHz and 5.775GHz, from three figure as can be seen, when antenna is worked in three frequency bands, its directional diagram is similar to the omnidirectional radiation characteristic, satisfies the requirement of wireless lan communication system to mobile radio terminal.
Claims (3)
1. three band microstrip antennas that are applied to WLAN (wireless local area network), this three band microstrips antenna of its feature comprises: comprise microstrip feed line (1), left side metal tape (2,7,8), right side metal tape (3,5,6), dielectric-slab (4), metal ground (9); Wherein:
A. dielectric-slab (4) is rectangular, is a double-sided copper-clad dielectric-slab;
B. the radiating antenna unit comprises left side metal tape (2,7,8) and right side metal tape (3,5,6), is distributed in the front of described medium substrate;
C. microstrip feed line (1), is close to the front of described medium substrate by totally one;
D. metal ground (9) are positioned at described medium substrate back underside.
2. the three band microstrip antenna systems that are applied to WLAN (wireless local area network) as claimed in claim 1 is characterized in that:
A. microstrip feed line (1) is parallel with metal ground (9); It is cut that the size on metal ground and medium substrate (4) size are compared part;
B. the radiating antenna unit is parallel to above-mentioned metal ground (9), and has two open ends; Two open ends of radiating antenna unit and the length between the feed place are ± quarter-wave; And interval different distance between the two-way metal tape, bending direction is also inequality.
3. the three band microstrip antenna systems that are applied to WLAN (wireless local area network) as claimed in claim 2 is characterized in that: the set position of microstrip feed line (1) is in a side of bending metals band, and feeding classification is an asymmetric manner, can obtain the bandwidth of operation of three frequency ranges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100595600A CN102176541A (en) | 2011-03-14 | 2011-03-14 | Three-frequency channel microstrip antenna used in wireless local area network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100595600A CN102176541A (en) | 2011-03-14 | 2011-03-14 | Three-frequency channel microstrip antenna used in wireless local area network |
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| CN102176541A true CN102176541A (en) | 2011-09-07 |
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| CN2011100595600A Pending CN102176541A (en) | 2011-03-14 | 2011-03-14 | Three-frequency channel microstrip antenna used in wireless local area network |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102509875A (en) * | 2011-11-03 | 2012-06-20 | 云南大学 | Broadband planar two-antenna system |
| CN103367893A (en) * | 2013-07-04 | 2013-10-23 | 云南大学 | High-isolation broadband two-antenna system |
| CN103490155B (en) * | 2013-09-24 | 2016-03-30 | 西安电子科技大学 | A kind of four frequency range printed antennas being applied to radio communication |
| CN108172987A (en) * | 2017-12-06 | 2018-06-15 | 广州创锦通信技术有限公司 | Apply the three-frequency antenna in GPS, LTE and WIFI frequency range |
| CN111416199A (en) * | 2020-03-13 | 2020-07-14 | 广东工业大学 | Multi-band vehicle-mounted communication antenna |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201188457Y (en) * | 2008-03-27 | 2009-01-28 | 芜湖睿尔科技有限公司 | V-shaped multi-frequency band wideband patch antenna |
| CN101431182A (en) * | 2008-12-17 | 2009-05-13 | 清华大学 | Reconfigurable antenna used for mobile terminal |
-
2011
- 2011-03-14 CN CN2011100595600A patent/CN102176541A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201188457Y (en) * | 2008-03-27 | 2009-01-28 | 芜湖睿尔科技有限公司 | V-shaped multi-frequency band wideband patch antenna |
| CN101431182A (en) * | 2008-12-17 | 2009-05-13 | 清华大学 | Reconfigurable antenna used for mobile terminal |
Non-Patent Citations (1)
| Title |
|---|
| KUANG FUQIANG等，: "A triple-band Microstrip Antenna for WLAN Applications", 《2010 INTERNATIONAL CONFERENCE ON COMMUNICATIONS AND MOBILE COMPUTING》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102509875A (en) * | 2011-11-03 | 2012-06-20 | 云南大学 | Broadband planar two-antenna system |
| CN103367893A (en) * | 2013-07-04 | 2013-10-23 | 云南大学 | High-isolation broadband two-antenna system |
| CN103490155B (en) * | 2013-09-24 | 2016-03-30 | 西安电子科技大学 | A kind of four frequency range printed antennas being applied to radio communication |
| CN108172987A (en) * | 2017-12-06 | 2018-06-15 | 广州创锦通信技术有限公司 | Apply the three-frequency antenna in GPS, LTE and WIFI frequency range |
| CN111416199A (en) * | 2020-03-13 | 2020-07-14 | 广东工业大学 | Multi-band vehicle-mounted communication antenna |
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Application publication date: 20110907 |