CN104103897A - Compact UWB (ultra wide band) antenna based on L-shaped parasitic strip - Google Patents
Compact UWB (ultra wide band) antenna based on L-shaped parasitic strip Download PDFInfo
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- CN104103897A CN104103897A CN201410377391.9A CN201410377391A CN104103897A CN 104103897 A CN104103897 A CN 104103897A CN 201410377391 A CN201410377391 A CN 201410377391A CN 104103897 A CN104103897 A CN 104103897A
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Abstract
The invention discloses a compact UWB (ultra wide band) antenna based on an L-shaped parasitic strip, and belongs to the technical field of an UWB antenna. The UWB antenna comprises a radiation paster, a dielectric substrate, a ground plate, parasitic strip parts, a micro-strip feeder and a coaxial cable, wherein the upper surface of the dielectric substrate sticks close to the orthohexagonal metal radiation paster; the micro-strip feeder sticks close to the upper surface of the dielectric substrate, one end of the micro-strip feeder is connected with the radiation paster, and the other end of the micro-strip feeder is connected with a conductor in a coaxial cable; the coaxial cable further comprises a dielectric layer and an outer conductor, wherein the outer conductor is in contact with the grounding plate; the parasitic strips are located at the two sides of the micro-strip feeder and are two L-shaped strips of different sizes; and a rectangular slot is formed in the top of the grounding plate. The compact UWB antenna based on the L-shaped parasitic strip is simple in structure, smaller in size and good and stable in UWB radiation characteristic.
Description
Technical field
The invention belongs to ultra-wideband antenna technical field, relate to a kind of compact ultra-wideband antenna based on the parasitic band of L-type.
Background technology
Ultra broadband (UWB) technology has the advantages such as high transfer rate, rational image analysis and high security, has broad application prospects at numerous areas such as radio communication, microwave imaging and electronic countermeasuress.Ultra-wideband antenna is one of critical component of ultra-wideband communication system, and its characteristic directly affects the performance of whole system.Along with FCC (FCC) ratifies using 3.1-10.6GHz as short-distance wireless communication frequency range, ultra-wideband antenna technology has received all the more people's concern, the design of people to ultra-wideband antenna, also and be not limited to UWB frequency range, but for ultra-wideband antenna, more and more higher requirement has been proposed, especially at aspects such as broadband, miniaturization, complanation and the constructional simplicity of ultra-wideband antenna.
At present, expansion compact planar ultra-wideband antenna bandwidth main method has following several: the first, change size and the form of ground plate, and as by ground plate size reduction, ground plate edge adopts notch cuttype, arc etc.; The second, on ground plate, open single or multiple grooves; The 3rd, change the form of radiation patch, as adopt circle, ellipse, irregular polygon etc.; The 4th, in radiation patch, open complicated groove structure; The 5th, adopt feeder line of more piece gradual change etc.Make a general survey of these methods, if go for enough large bandwidth, its groove structure or radiation patch structure meeting more complicated, and be difficult to meet the obvious increase that realizes bandwidth on the basis of miniaturization.Therefore, seek novel design concept, development and Design compact conformation, simplicity of design, be easy to processing and the wider ultra-wideband antenna of the frequency band direction of constantly making great efforts for current vast antenna worker.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of compact ultra-wideband antenna based on the parasitic band of L-type, this antenna structure is simple, size is little, have good ultra-wide-band emission characteristic.
For achieving the above object, the invention provides following technical scheme:
Based on a compact ultra-wideband antenna for the parasitic band of L-type, comprise radiation patch, medium substrate, ground plate, parasitic strip portion, microstrip feed line and coaxial cable; Described medium substrate upper surface is close to regular hexagon metal radiation paster; Described microstrip feed line is close to medium substrate upper surface, and one end is connected with radiation patch, and the other end is connected with coaxial cable inner wire; Described coaxial cable also comprises dielectric layer and outer conductor, and this outer conductor contacts with ground plate; Described parasitic band is positioned at microstrip feed line both sides, is two L-type bands that size is different; Described ground plate top has a rectangular channel.
Further, described regular hexagon metal radiation paster is positioned at medium substrate upper surface top, and its length of side L is 8.6-8.7mm, and thickness is 0.016-0.018mm.
Further, described microstrip feed line length L 2 is 17.7-17.9mm, and width W 2 is 3.4-3.6mm.
Further, coaxial cable inner wire radius R 3 is 0.55-0.65mm, and length of cable L3 is 4.8-5.1mm, and inner wire is connected part for semicylinder with microstrip line, and its length is 1.9-2.1mm, and radius is 0.55-0.65mm; Outer conductor internal diameter R2 is 2.0-2.1mm, outer conductor external diameter 3.0-3.1mm.
Further, the parasitic bar belt length of side L-type L4+L5 is 24.8-26.8mm, and width W is 0.9-1.1mm; The parasitic bar belt length of opposite side L-type L6+L7 is 19.1-21.1mm, and width W is 0.9-1.1mm.
Further, ground plate is positioned at medium substrate below ground, and its length L 8 is 11.5mm, and width is identical with medium substrate, is W1, and its size is 25mm.
Further, slot and be positioned at ground plate top center on ground plate, its depth H is 3.4-3.6mm, and width W 3 is 5.1-5.3mm.
Further, medium substrate material is FR4, its dielectric constant approximately 4.4, and loss angle tangent approximately 0.016, substrate length L 1 is 33mm, width W 1 is 25mm.
Beneficial effect of the present invention is: 1), by reducing the size of ground plate and expanding the size of radiation patch, the peak low band of its work has been reached below 2.4GHz; 2), for produce the deterioration of antenna performance at 3-4.5GHz thereupon, further by the parasitic band of design L-type, make this antenna produce two resonance points at 3.6GHz and 4.4GHz place, thereby solved the impedance mismatch problem of this frequency range; 3) except the effective bandwidth of expanding antenna, also there is compact conformation, simple, be easy to the advantages such as manufacture, can be used for WLAN, in the communication system of WiMAX frequency range.
Brief description of the drawings
In order to make object of the present invention, technical scheme and beneficial effect clearer, the invention provides following accompanying drawing and describe:
Fig. 1 is the overall structure 3-D view of the compact ultra-wideband antenna based on the parasitic band of L-type of the present invention;
Fig. 2 is the vertical view of the compact ultra-wideband antenna based on the parasitic band of L-type of the present invention;
Fig. 3 is the front view of the compact ultra-wideband antenna based on the parasitic band of L-type of the present invention;
Fig. 4 is the end view of the compact ultra-wideband antenna based on the parasitic band of L-type of the present invention;
Fig. 5 is the curve chart of S parameter of the present invention with frequency change;
Fig. 6 is the antenna pattern of the present invention at 2.65GHz frequency;
Fig. 7 is the antenna pattern of the present invention at 3.61GHz frequency;
Fig. 8 is the antenna pattern of the present invention at 4.4GHz frequency;
Fig. 9 is the antenna pattern of the present invention at 6.1GHz frequency;
Figure 10 is the antenna pattern of the present invention at 7.41GHz frequency;
Figure 11 is the antenna pattern of the present invention at 10.06GHz frequency.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail.
Fig. 1 is the overall structure 3-D view of the compact ultra-wideband antenna based on the parasitic band of L-type of the present invention, as shown in the figure:
Compact ultra-wideband antenna based on the parasitic band of L-type of the present invention comprises medium substrate, ground plate, metal radiation paster, microstrip feed line, coaxial cable, L-type metal parasitic structure.
Wherein, metal ground plate is close in the bottom of medium substrate, the same medium substrate of width of ground plate, its length is less than the half of medium substrate, in medium substrate top edge centre, dug a rectangular channel, this rectangular channel and feeder line have good coupling, are making antenna have good stationary wave characteristic in 8.5-10.7GHz frequency range.
The upper surface of medium substrate is close to regular hexagon radiation patch, this radiation patch top approaches the top edge of medium substrate, in the process of experiment simulation, we find, regular hexagon area is larger, whole antenna more can show good stationary wave characteristic in low-frequency range, and therefore we,, not expanding under the condition of antenna area, expand its effective area by the mode that allows radiation patch approach medium substrate top edge.
Medium substrate upper surface is close to microstrip feed line, and microstrip feed line is bar shaped, and its length L 2 is 17.7-17.9mm, and width W 2 is 3.4-3.6mm.Micro-band is connected radiation patch bottom with coaxial cable inner core, the junction of microstrip line and coaxial cable inner core is the prolongation of first cylinder of cable inner core.
Microstrip line both sides are L-type parasitic structure, and the L-type parasitic structure of both sides varies in size, the resonance mode of operation of this antenna at two different frequent points that difference is corresponding, and its resonance derives from the coupling of parasitic band and microstrip feed line.
Medium substrate is thin rectangular build substrate, its length L 1 is 33mm, and width W 1 is 25mm, and thickness H1 is 1.6mm, material selection FR4 epoxy resin board, relative dielectric constant is 4.4, and relative permeability is 1.0, and loss angle tangent is 0.02, the ground plate of medium substrate upper and lower surface, microstrip feed line, radiation patch, parasitic structure be thickness identical cover copper film.
Below by specific embodiment, concrete scheme of the present invention is described.
Referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4.Wherein, 1-medium substrate, 2-radiation patch, 3-microstrip line, the parasitic band in 4-left side, the parasitic band in 5-right side, 6-ground plate, 7-coaxial cable inner wire, 8-coaxial cable dielectric layer, 9-coaxial cable outer conductor.Described medium substrate 1 lower surface is close to the ground plate 6 that has rectangular channel, upper surface is close to radiation patch 2, microstrip line 3 couples together radiation patch 2 and coaxial cable inner wire 7, microstrip line 3 left sides are L-type parasitic structure 4, its size is larger, microstrip line 3 right side wall L-type parasitic structure 5, its size is less, and coaxial cable outer conductor 8 is connected with ground plate 6.Medium substrate 1 is thin cuboid, and it is long is L1, and wide is W1, and thickness is H1, adopts FR4 epoxy resin board as making material, and its relative dielectric constant is 4.4, and relative permeability is 1.0, and loss angle tangent is 0.02.
After completing above-mentioned initial designs, use the HFSS13.0 of high-frequency electromagnetic simulation software to carry out simulation analysis, as shown in the table through obtaining parameters size after simulation optimization
The each parameters optimal size table of table 1 the present invention
According to above-mentioned parameter, use the S parameter of HFSS to the designed compact ultra-wideband antenna based on the parasitic band of L-type, voltage standing wave ratio VSWR, the characterisitic parameters such as direction radiation gain carry out simulation analysis, and its analysis result is as follows:
Fig. 5 is S parameters simulation curve chart of the present invention, as shown in the figure, | S
11| under <-10dB condition, the impedance bandwidth scope of this antenna is 2.39-11.95GHz, has six resonance frequency centers, and its resonant frequency value is respectively 2.65GHz, 3.61GHz, 4.4GHz, 6.1GHz, 7.41GHz and 10.06GHz.Wherein, it should be noted that the resonance of 3.61GHz and 4.4GHz is determined by the parasitic band of two of left and right L-type respectively, the resonance of 10.06GHz has been subject to the impact of the rectangular channel of opening on ground plate.
Fig. 6-Figure 11 is the antenna pattern of the present invention at 2.65GHz, 3.61GHz, 4.4GHz, 6.1GHz, 7.41GHz, six Frequency points of 10.06GHz, as can be seen from the figure, at low frequency place, antenna pattern is distributed symmetrically, and has good omni-directional on H face.With the increase of frequency, there is deterioration phenomenon to a certain degree in the omnidirectional radiation of antenna and symmetry, and its reason is that the change of frequency makes radiation patch, and certain change has occurred the electric current of ground plate rectangular channel and feeder line both sides.
In sum, this antenna structure compactness, frequency coverage by 2.39GHz to 11.95GHz, in covering ultra wideband frequency range (3.1-10.6GHz), the low-frequency range (2.4/5.2/5.8GHz) and the WiMAX frequency range (2.5/3.5/5.5GHz) that have effectively covered WLAN, have good voltage standing wave(VSW) characteristic and better and stable antenna pattern.
Finally explanation is, above preferred embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is described in detail by above preferred embodiment, but those skilled in the art are to be understood that, can make various changes to it in the form and details, and not depart from the claims in the present invention book limited range.
Claims (8)
1. the compact ultra-wideband antenna based on the parasitic band of L-type, is characterized in that: comprise radiation patch, medium substrate, ground plate, parasitic strip portion, microstrip feed line and coaxial cable; Described medium substrate upper surface is close to regular hexagon metal radiation paster; Described microstrip feed line is close to medium substrate upper surface, and one end is connected with radiation patch, and the other end is connected with coaxial cable inner wire; Described coaxial cable also comprises dielectric layer and outer conductor, and this outer conductor contacts with ground plate; Described parasitic band is positioned at microstrip feed line both sides, is two L-type bands that size is different; Described ground plate top has a rectangular channel.
2. a kind of compact ultra-wideband antenna based on the parasitic band of L-type according to claim 1, it is characterized in that: described regular hexagon metal radiation paster is positioned at medium substrate upper surface top, its length of side L is 8.6-8.7mm, and thickness is 0.016-0.018mm.
3. a kind of compact ultra-wideband antenna based on the parasitic band of L-type according to claim 1, is characterized in that: described microstrip feed line length L 2 is 17.7-17.9mm, and width W 2 is 3.4-3.6mm.
4. a kind of compact ultra-wideband antenna based on the parasitic band of L-type according to claim 1, it is characterized in that: coaxial cable inner wire radius R 3 is 0.55-0.65mm, length of cable L3 is 4.8-5.1mm, inner wire is connected part for semicylinder with microstrip line, its length is 1.9-2.1mm, and radius is 0.55-0.65mm; Outer conductor internal diameter R2 is 2.0-2.1mm, outer conductor external diameter 3.0-3.1mm.
5. a kind of compact ultra-wideband antenna based on the parasitic band of L-type according to claim 1, is characterized in that: the parasitic bar belt length of side L-type L4+L5 is 24.8-26.8mm, and width W is 0.9-1.1mm; The parasitic bar belt length of opposite side L-type L6+L7 is 19.1-21.1mm, and width W is 0.9-1.1mm.
6. a kind of compact ultra-wideband antenna based on the parasitic band of L-type according to claim 1, is characterized in that: ground plate is positioned at medium substrate below ground, and its length L 8 is 11.5mm, and width is identical with medium substrate, is W1, and its size is 25mm.
7. a kind of compact ultra-wideband antenna based on the parasitic band of L-type according to claim 1, is characterized in that: on ground plate, slot and be positioned at ground plate top center, its depth H is 3.4-3.6mm, and width W 3 is 5.1-5.3mm.
8. a kind of compact ultra-wideband antenna based on the parasitic band of L-type according to claim 1, is characterized in that: medium substrate material is FR4, its dielectric constant approximately 4.4, and loss angle tangent approximately 0.016, substrate length L 1 is 33mm, width W 1 is 25mm.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104882675A (en) * | 2015-05-05 | 2015-09-02 | 重庆大学 | Ultra-wideband antenna with adjustable double notches based on varactors |
| CN105024164A (en) * | 2015-06-29 | 2015-11-04 | 蔡桂钧 | UWB (ultra wide band) antenna based on U-shaped groove and L-shaped parasitic strips |
| CN105161843A (en) * | 2015-10-22 | 2015-12-16 | 珠海纳睿达科技有限公司 | Antenna |
| CN105720359A (en) * | 2016-04-20 | 2016-06-29 | 西南交通大学 | Broadband dielectric resonator antenna |
| TWI577083B (en) * | 2015-11-24 | 2017-04-01 | 財團法人金屬工業研究發展中心 | A microstrip antenna with narrow half power beam width |
| CN106876961A (en) * | 2015-12-13 | 2017-06-20 | 哈尔滨飞羽科技有限公司 | A kind of new hexagon Ultrawide-band trap antenna |
| CN106876963A (en) * | 2015-12-13 | 2017-06-20 | 哈尔滨飞羽科技有限公司 | A kind of new hexagon Ultrawide-band trap antenna |
| CN106876962A (en) * | 2015-12-13 | 2017-06-20 | 哈尔滨飞羽科技有限公司 | A kind of new hexagon Ultrawide-band trap antenna |
| CN109411900A (en) * | 2018-12-14 | 2019-03-01 | 湖南华诺星空电子技术有限公司 | A kind of broad-band antenna for through-wall radar imaging |
| CN111697300A (en) * | 2020-05-13 | 2020-09-22 | 中国科学院上海微系统与信息技术研究所 | Multi-channel transmission structure for low-temperature interconnection and transmission line |
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| CN203218448U (en) * | 2013-04-11 | 2013-09-25 | 中国计量学院 | Bow-tie wideband microstrip antenna |
| CN203690491U (en) * | 2013-11-27 | 2014-07-02 | 哈尔滨飞羽科技有限公司 | Ultra-wideband antenna with WLAN dual band-notched characteristic |
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Patent Citations (2)
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| CN203218448U (en) * | 2013-04-11 | 2013-09-25 | 中国计量学院 | Bow-tie wideband microstrip antenna |
| CN203690491U (en) * | 2013-11-27 | 2014-07-02 | 哈尔滨飞羽科技有限公司 | Ultra-wideband antenna with WLAN dual band-notched characteristic |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104882675A (en) * | 2015-05-05 | 2015-09-02 | 重庆大学 | Ultra-wideband antenna with adjustable double notches based on varactors |
| CN104882675B (en) * | 2015-05-05 | 2017-09-05 | 重庆大学 | A kind of adjustable ultra-wideband antenna of double traps based on varactor |
| CN105024164A (en) * | 2015-06-29 | 2015-11-04 | 蔡桂钧 | UWB (ultra wide band) antenna based on U-shaped groove and L-shaped parasitic strips |
| CN105161843A (en) * | 2015-10-22 | 2015-12-16 | 珠海纳睿达科技有限公司 | Antenna |
| TWI577083B (en) * | 2015-11-24 | 2017-04-01 | 財團法人金屬工業研究發展中心 | A microstrip antenna with narrow half power beam width |
| CN106876961A (en) * | 2015-12-13 | 2017-06-20 | 哈尔滨飞羽科技有限公司 | A kind of new hexagon Ultrawide-band trap antenna |
| CN106876963A (en) * | 2015-12-13 | 2017-06-20 | 哈尔滨飞羽科技有限公司 | A kind of new hexagon Ultrawide-band trap antenna |
| CN106876962A (en) * | 2015-12-13 | 2017-06-20 | 哈尔滨飞羽科技有限公司 | A kind of new hexagon Ultrawide-band trap antenna |
| CN105720359A (en) * | 2016-04-20 | 2016-06-29 | 西南交通大学 | Broadband dielectric resonator antenna |
| CN109411900A (en) * | 2018-12-14 | 2019-03-01 | 湖南华诺星空电子技术有限公司 | A kind of broad-band antenna for through-wall radar imaging |
| CN111697300A (en) * | 2020-05-13 | 2020-09-22 | 中国科学院上海微系统与信息技术研究所 | Multi-channel transmission structure for low-temperature interconnection and transmission line |
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| CN104103897B (en) | 2016-08-24 |
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Effective date of registration: 20200902 Address after: 644000 West Section of Harbour Garden Avenue, Lingang Economic and Technological Development Zone, Yibin City, Sichuan Province Patentee after: SICHUAN CHANGJIANG HUAYUN ELECTRONIC TECHNOLOGY Co.,Ltd. Address before: 400044 Shapingba street, Shapingba District, Chongqing, No. 174 Patentee before: Chongqing University |
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