CN202585734U - Miniature three-frequency range printing antenna - Google Patents
Miniature three-frequency range printing antenna Download PDFInfo
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- CN202585734U CN202585734U CN 201220268381 CN201220268381U CN202585734U CN 202585734 U CN202585734 U CN 202585734U CN 201220268381 CN201220268381 CN 201220268381 CN 201220268381 U CN201220268381 U CN 201220268381U CN 202585734 U CN202585734 U CN 202585734U
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- flanked ring
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Abstract
The utility model discloses a miniature three-frequency range printing antenna, and the antenna can be used on equipment in the wireless communication field. The antenna is composed of a medium substrate, a radiating patch, a microstrip feeder and a grounding board, wherein the radiating patch is formed by three crossed rectangular rings, and the radiating patch and the microstrip feeder are of an axisymmetric structure relative to the axle wire of the medium substrate; and the grounding board is located on the bottom part of the lower surface of the medium substrate. The working bandwidth and the impedance matching characteristic of the miniature three-frequency range printing antenna disclosed by the utility model meet wireless communication demands.
Description
Technical field
The utility model belongs to field of antenna, designs a kind of three frequency range small-print antennas that formed by three straight-flanked rings intersections especially.
Background technology
Along with development of wireless communication devices, the especially development of WLAN and global interconnected Access Network, more and more stronger for the demand of the double frequency of miniaturization or multifrequency antenna.Printed antenna is simple in structure with it, cost is low, be easy to advantage such as processing has caused widely and has paid close attention to, and has been applied to multiple wireless device.
The method that realizes the antenna multiband at present has the slit to load; Racemosus joint structure etc.; The cleer and peaceful Chu Qing sunrise of the horse Chinese proposed a kind of top-loaded distortion monopole antenna structure in 2009 in " South China Science & Engineering University's journal (natural science edition) " the 37th the 5th phase of volume; On non-main pole direction, introduce multifrequency resonance minor matters and realize tri-band antenna, be unfavorable for making the defective that impedance bandwidth is narrower but exist complex structure.
Summary of the invention
Deficiency to prior art; A kind of three frequency range printed antennas by feed microstrip line are proposed; The radiation fin of this antenna is to be intersected by three straight-flanked rings that vary in size to form, and constructs current path length different on the radiation fin respectively, thereby three resonance band occur.Optimize impedance bandwidth through adjustment straight-flanked ring top longitudinal edge width, realize impedance matching.Advantages such as simple in structure, easy processing that this antenna has, impedance bandwidth broad.
The utility model adopts following technical scheme:
The structure of these three frequency range printed antennas comprises: medium substrate, radiation patch, microstrip feed line and ground plate.Described straight-flanked ring radiation patch is to be intersected by three straight-flanked ring to form, and radiation patch and microstrip feed line are about the axis of medium substrate structure axisymmetricly; Described ground plate is positioned at the lower surface bottom of medium substrate.
This programme beneficial effect is: intersect the radiant body that forms through three straight-flanked rings and reduced the area of radiant body effectively, increased the path of antenna radiator surface current, thereby reduced antenna size, realized miniaturization; Through regulating the width of each straight-flanked ring top longitudinal edge, the impedance bandwidth that can regulate antenna is improved the impedance matching property in the working frequency range.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further specified.
Fig. 1 is the front elevation of the utility model three frequency range printed antennas.
Fig. 2 is the back view of the utility model three frequency range printed antennas.
Fig. 3 is the end view of the utility model three frequency range printed antennas.
Fig. 4 is the reflection coefficient chart of three working frequency range of the utility model three frequency range printed antennas.
Fig. 5 is the directional diagrams of the utility model three frequency range printed antennas when 2.5GHz.
Fig. 6 is the directional diagrams of the utility model three frequency range printed antennas when 3.5GHz.
Fig. 7 is the directional diagrams of the utility model three frequency range printed antennas when 5.5GHz.
Among the figure: 1-large rectangle ring radiation patch, straight-flanked ring radiation patch among the 2-, 3-medium substrate, 4-microstrip feed line, the little straight-flanked ring radiation patch of 5-, 6-ground plate.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further described.
Referring to Fig. 1, Fig. 2 and Fig. 3, a kind of design that is applied to the small-sized three frequency range printed antennas of WLAN/WiMAX.This antenna is by large rectangle ring radiation patch 1, middle straight-flanked ring radiation patch 2, and little straight-flanked ring radiation patch 5, medium substrate 3, microstrip feed line 4 is formed with ground plate 6.
Practical implementation is following: large rectangle ring radiation patch 1, middle straight-flanked ring radiation patch 2, little straight-flanked ring radiation patch 5 and microstrip feed line 4 are positioned at medium substrate central authorities, about medium substrate axis structure axisymmetricly.Whole radiation patch is to be intersected by large, medium and small three straight-flanked ring radiation patch to form, and is followed successively by ascending.Straight-flanked ring from draw little straight-flanked ring middle part, therefrom the large rectangle ring is drawn in the straight-flanked ring middle part.Ground plate 6 is a rectangle, is positioned at medium substrate 3 lower surfaces bottom.Little straight-flanked ring radiation patch bottom is connected with microstrip feed line 4 tops.
Referring to Fig. 1, Fig. 2 and Fig. 3, label 3 medium substrates, its material are polytetrafluoroethylene (FR-4), and its dielectric constant is 4.4, and the size that its length and width are high is 38mm * 26mm * 1.6mm.The radiation patch of antenna, ground plate and microstrip feed line are used shadow representation in the drawings, and the shape of antenna can be obtained by corrosion.Label 1 is a large rectangle ring radiation patch in the present embodiment, and its outside length and width are of a size of 24mm * 19mm; Label 2 is middle straight-flanked ring radiation patch, and its outside length and width are of a size of 16mm * 10mm; Label 5 is little straight-flanked ring radiation patch, and its outside length and width are of a size of 10mm * 4mm; Label 4 is microstrip feed lines, and its length and width are of a size of 9.2mm * 3mm; Label 6 is ground plates, and its length and width are of a size of 26mm * 8mm.
Three straight-flanked rings in the radiation patch are used for resonance and go out three frequency ranges, and it is to regulate impedance matching that each straight-flanked ring top sides mainly acts on, and optimizes impedance bandwidth.The parameter of each part is following to the influence of antenna impedance: at first change the width of the top longitudinal edge of little straight-flanked ring, constantly reduce its width, high band impedance bandwidth constantly increases, but antenna can not be realized the isolation to the 4-5GHz frequency range.Therefore can be according to the size of width that realizes the isolation of 4-5GHz frequency range is confirmed the top longitudinal edge of little straight-flanked ring; The preferable width of the width of the top longitudinal edge of the medium and small straight-flanked ring of present embodiment is 1.8mm, and the width of confirming the top longitudinal edge of little straight-flanked ring is 1.8mm; The width of straight-flanked ring top longitudinal edge in changing below, its width of suitable increase, wherein between the impedance bandwidth of frequency range also broaden thereupon, but the amplitude of regulating is little, in the present embodiment in the width of straight-flanked ring top longitudinal edge be 4mm; Change the width of large rectangle ring top longitudinal edge below, its width of suitable increase, the impedance bandwidth of its low-frequency range also broadens thereupon, but the amplitude of regulating is little, and the width of large rectangle ring top longitudinal edge is 3.5mm in the present embodiment.Therefore through above change, obtained having the three-frequency antenna of good resistance bandwidth.
Fig. 4 is the reflection coefficient chart of the utility model antenna, can find out that therefrom the good resonance of antenna goes out three working frequency range, satisfies the requirement of radio communication.Like the directional diagram of Fig. 5, Fig. 6 and this antenna that is respectively present embodiment when frequency 2.5GHz, 3.5GHz and the 5.5GHz shown in Figure 7, can find out that antenna has this good omnidirectional's characteristic at horizontal plane.Satisfy the index request of three-frequency antenna design.
Above-mentioned instance is the utility model preferred implementation, on the basis of present embodiment, changes the size of radiation patch, microstrip feed line and ground plane in addition; Change the size of straight-flanked ring, all should be included in the protection range of the utility model.
Claims (3)
1. small-sized three frequency range printed antennas; Comprise medium substrate, straight-flanked ring radiation patch, microstrip feed line and ground plate; It is characterized in that: described straight-flanked ring radiation patch is to be intersected by three straight-flanked rings to form, and straight-flanked ring radiation patch and microstrip feed line are about the axis of medium substrate structure axisymmetricly.
2. a kind of small-sized three frequency range printed antennas according to claim 1, its characteristic comprises: described straight-flanked ring radiation patch is that three straight-flanked rings that vary in size intersect successively and form, and the straight-flanked ring radiation patch is positioned at the upper surface of medium substrate.
3. a kind of small-sized three frequency range printed antennas according to claim 1, its characteristic comprises: the top longitudinal edge width of each straight-flanked ring that described straight-flanked ring radiation patch is contained is different from the width of minor face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220268381 CN202585734U (en) | 2012-06-08 | 2012-06-08 | Miniature three-frequency range printing antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220268381 CN202585734U (en) | 2012-06-08 | 2012-06-08 | Miniature three-frequency range printing antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202585734U true CN202585734U (en) | 2012-12-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220268381 Expired - Fee Related CN202585734U (en) | 2012-06-08 | 2012-06-08 | Miniature three-frequency range printing antenna |
Country Status (1)
| Country | Link |
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| CN (1) | CN202585734U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105161839A (en) * | 2015-09-25 | 2015-12-16 | 西安电子科技大学 | Three-band antenna and signal transmitting and receiving method for antenna |
| WO2018184358A1 (en) * | 2017-04-07 | 2018-10-11 | 深圳市景程信息科技有限公司 | Three-mode wideband stepped-slot antenna |
| WO2018184354A1 (en) * | 2017-04-07 | 2018-10-11 | 深圳市景程信息科技有限公司 | High-isolation dual-polarization broadband antenna |
-
2012
- 2012-06-08 CN CN 201220268381 patent/CN202585734U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105161839A (en) * | 2015-09-25 | 2015-12-16 | 西安电子科技大学 | Three-band antenna and signal transmitting and receiving method for antenna |
| WO2018184358A1 (en) * | 2017-04-07 | 2018-10-11 | 深圳市景程信息科技有限公司 | Three-mode wideband stepped-slot antenna |
| WO2018184354A1 (en) * | 2017-04-07 | 2018-10-11 | 深圳市景程信息科技有限公司 | High-isolation dual-polarization broadband antenna |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121205 Termination date: 20130608 |