CN102509877A - Small-sized ultra-wide band antenna - Google Patents
Small-sized ultra-wide band antenna Download PDFInfo
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- CN102509877A CN102509877A CN2011103661854A CN201110366185A CN102509877A CN 102509877 A CN102509877 A CN 102509877A CN 2011103661854 A CN2011103661854 A CN 2011103661854A CN 201110366185 A CN201110366185 A CN 201110366185A CN 102509877 A CN102509877 A CN 102509877A
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- slab
- semicircle
- radiating element
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Abstract
The invention discloses a small-sized ultra-wide band antenna. The ultra-wide band antenna comprises a medium plate, a radiating unit, a grounding unit, a feedback unit and a microwave connector, wherein the radiating unit, the grounding unit and the feedback unit are arranged on the medium plate, and the microwave connector is connected with a coaxial cable. The medium plate is formed by a material with low dielectric constant; the semicircular directed edge of the semicircular radiating unit coincided with one edge of the medium plate is arranged on the front side of the medium plate; the radiating unit is connected with the feedback unit; the back side of the medium plate is provided with the grounding unit with a semicircular saddle type concave shape; and the feedback unit located on the front side of the medium plate and the grounding plate located on the medium plate are respectively connected with the microwave and the shielding conducting and the medium core conducting wire of the coaxial cable.
Description
Technical field
The present invention relates to a kind of ultra-wideband antenna, particularly a kind of antenna that is used for Wireless Telecom Equipment, the ultra-wideband antenna that for example on the portable mobile electronic device of USB flash disk size, uses with reduced size.Antenna of the present invention is primarily aimed at 3.1GHz～10.6GHz frequency range, and the ultra-wideband antenna of application demand is satisfied in design.
Background technology
Ultra broadband (ultra-wide band UWB) radiotechnics is the emerging technology of wireless domain, and it has characteristics such as two-forty, low cost, low-power consumption, is one of optimal candidate technology of short distance high-rate wireless communication of future generation.Simultaneously it shares frequency band with other existing conventional wireless techniques, and this provides a good solution for solving at present the frequency spectrum resource that day is becoming tight.The super wideband wireless power technology all has broad application prospects in various fields such as radio communication, radar, tracking, accurate location, weapon controls.The notion of ultra broadband has been made clear and definite definition first by U.S. national defense advanced research projects agency (DARPA) in 1989, promptly greater than 20%, but only use in radar remote sensing and military communication by super-broadband tech greater than 1.5GHz or relative bandwidth for absolute bandwidth.Up in April, 2002; FCC (FCC) has passed through the commercialization permission of UWB technology; Simultaneously the connotation of civil area ultra broadband is adjusted; Opened three UWB application bands: be lower than 960MHz, 3.1GHz～10.6GHz and 22GHz～29GHz, the application aspect the communication technology is current to be concentrated in 3.1GHz～10.6GHz frequency range, and super broad band radio communication begins to receive common concern at civil area.Antenna has become one of focus of our times antenna research field gradually as the critical component of ultra-wideband communication system, and global many countries have started the ultra-wideband antenna project successively.
The design of ultra-wideband antenna faces more challenge than the design of traditional narrow antenna.Mostly the ultra broadband terminal equipment is portable mobile apparatus, thus require antenna to have planar structure, and volume is little, and input coupling preferably and radiation characteristic also will be arranged simultaneously.The parameter of conventional description narrow-band antenna performance; Be not enough to ultra-wideband antenna is made sufficient description such as impedance matching, gain, polarization etc.; Ultra-wideband antenna is also wanted the paired pulses waveform that good fidelity is arranged, higher new specification requirements such as radiation efficiency is arranged when satisfying its impedance bandwidth and containing FCC predetermined band scope.
Existing ultra-wideband antenna can be realized the specification requirement in the required frequency range; But volume is all bigger than normal, referring to: H.Schantz., A brief history of UWB antennas [J] .Aerospace and electronicSystems Magazine; 2004,19 (4): 22-26.This deficiency of prior art makes super-broadband tech in small device, in the time of for example will being used in the equipment of picture USB flash disk size, receives certain restriction.
Summary of the invention
The present invention provides a kind of ultra-wideband antenna with reduced size, is keeping under the requirement of antenna good electrical properties, and the present invention can reduce the physical dimension of antenna greatly, makes it can be used in picture USB flash disk size, even on the littler portable mobile electronic device.
The ultra-wideband antenna of a kind of miniaturization of the present invention comprises: dielectric-slab, be arranged at the radiating element, ground unit and the feed element that constitute by electric conductor on the dielectric-slab, and the microwave junction that joins with coaxial cable.The used dielectric-slab of the present invention is made up of the material of low-k; The front of dielectric-slab is provided with the semicircle radiating element of a coincident of its semicircle straight flange and dielectric-slab; Radiating element links to each other with feed element; The back side of dielectric-slab is provided with the ground unit that has semicircle saddle type concave shape; Being positioned at the positive feed element of dielectric-slab joins through the worn-out lead of the screen of microwave junction and coaxial cable, SMIS lead respectively with the ground unit that is positioned at the dielectric-slab back side; Its concrete mode of connection is: the feed element of connection radiating element is joined through the SMIS lead of microwave junction and coaxial cable, and ground unit joins through the worn-out lead of the screen of microwave junction and coaxial cable; The feed element that perhaps connects radiating element is joined through the worn-out lead of the screen of microwave junction and coaxial cable, and the SMIS lead of ground unit through microwave junction and coaxial cable joins.The simplest mode of the feed element here is the lead that links to each other with microwave junction with radiating element respectively.In the antenna of the present invention, the straight flange of the semicircle saddle type concave shape of ground unit overlaps with the straight flange of the semicircle radiating element that the front of dielectric-slab is provided with; The semicircle saddle type concave shape of the ground unit at the dielectric-slab back side includes the positive semicircle radiating element of dielectric-slab in the positive projection of dielectric-slab; Its projected position at the dielectric-slab back side of unit that is to say the radiating element that dielectric-slab is positive is to be positioned within the ground unit at the dielectric-slab back side, and inscribe not; The radius R of radiating element semicircle
1Radius R with the semicircle saddle type indent of ground unit
2Ratio equal 5～9: 7～17; Dielectric-slab is: length>=(2R
2+ 1 millimeter), width>=(R
2+ 1/2 millimeter) rectangle.
The optimum structure of the ultra-wideband antenna of miniaturization of the present invention is: used dielectric-slab is the printed circuit board (PCB) of the two-sided deposited copper of rectangle, the Copper Foil reservation in its positive semicircle radiating element and feed element place; Copper Foil in the semicircle of the ground unit semicircle saddle type concave shape at its back side is removed, and keeps the Copper Foil of remainder.
The dielectric-slab wide that the present invention implements embodiment is 10 millimeters, and length is 20 millimeters, R
1Be 4.5 millimeters, R
2Be 7.5 millimeters, the semicircle center of circle of radiating element and the semicircle distance of center circle of ground unit are from being 2.8 millimeters.
The present invention can be regarded as circular slot antenna and shears along its central axis symmetry that half obtains.Analyze CURRENT DISTRIBUTION and can know it is symmetrical, therefore can keep under the little situation of antenna electrical property change, it is original half the to make antenna volume be reduced to.Because the arc-shaped structure of the radiating element of antenna and ground unit is in same direction, radii size differs, thus realized electromagnetic wave from the microstrip line to the free space smooth excessively, make antenna acquisition good matching properties.
The invention has the advantages that:
1. broadband character.Radiating element and ground unit all adopt the semi-circular arc line boundary, have realized the impedance transition mechanism structure, in the broadening antenna bandwidth, have reduced its volume.Frequency range covers the ultra broadband working frequency range of 3.1GHz～10.6GHz, has satisfied the requirement of super broad band radio communication system.
2. antenna volume is very little.Compare with the annular slot antenna of identical performance, volume reduces near half the, can be integrated on the mobile device of USB flash disk size.
3. simple in structure, can print making, consistency of performance is good, is fit to produce in batches.Entire antenna is a planar structure, is fit to other parts of system integrated, simple and practical.
4. the transfer function amplitude is smooth, and phase place is linear distribution, helps the transmission of ultra-broadband signal.
Description of drawings
Fig. 1 is the Facad structure sketch map of one embodiment of the present of invention;
Fig. 2 is the structure sketch map of an embodiment of the present invention, and the dotted portion among the figure is the projected position at positive radiating element 2 edges of dielectric-slab;
Fig. 3 is a side structure sketch map of the present invention, i.e. the right view of Fig. 1 (left view of Fig. 2);
Fig. 4 is the voltage standing wave ratio of emulation of the present invention and actual measurement;
Fig. 5 is an actual measurement transfer function amplitude of the present invention;
Fig. 6 is an actual measurement transfer function phase place of the present invention.
In Fig. 1 to Fig. 3: 1 is dielectric-slab, and 2 is radiating element, and 3 is feed element, and 4 is ground unit, and 5 is microwave junction.Radiating element 2 wherein links to each other with microstrip-fed unit 3 and is positioned on the dielectric-slab 1 positive same surface 4 back sides that are positioned at dielectric-slab 1 of ground unit.
Embodiment
Accompanying drawing is the sketch map of one embodiment of the present of invention, below in conjunction with description of drawings:
The embodiments of the invention that accompanying drawing provides are with the material that accompanies insulation board in the middle of the two-sided deposited copper; Be that common described printed circuit board (PCB) is processed; Radiating element 2 and microstrip-fed unit 3 are positioned at the one side of printed circuit board (PCB), and ground unit 4 then is positioned at the another side of printed circuit board (PCB).Radiating element 2 according to the invention is semi-discs that are made up of Copper Foil, and the axis of the direction of its straight flange and microstrip-fed unit 3 parallels, and a broadside of the extended line of straight flange and microstrip-fed unit 3 overlaps, referring to accompanying drawing 1.The rectangular configuration of ground unit 4 for revising; A limit that is about to the long limit of rectangle dielectric-slab replaces with the circular arc that caves inward; On the mid point that is centered close to the long limit of rectangle dielectric-slab of circular arc, and the indent direction of the conductor semi arch of radiating element 2 is consistent with ground unit 4 non-conductive medium semi arch indent directions, referring to accompanying drawing 2; And the Copper Foil among Fig. 2 in the light areas of the circular arc left side is removed, and only keeps the Copper Foil in the darker regions of circular arc right side.The feeding classification of embodiment shown in the drawings is: microstrip-fed unit 3 joins through the center conductor of microwave junction 5 with coaxial cable; Ground unit 4 joins through the worn-out lead of screen of microwave junction 5 with coaxial cable.Feeding classification also can be with microstrip-fed unit 3 through microwave junction 5 and coaxial cable the worn-out lead of screen join; Ground unit 4 joins through the center conductor of microwave junction 5 with coaxial cable.
In the specific embodiment of the present invention; The dielectric-slab that adopts is a printed circuit board (PCB); The dielectric constant of its dielectric-slab is 4.4 glass fiber, dielectric-slab the length and the width of corresponding rectangle be respectively 20mm and 10mm, the mode through plate making and corrosion is respectively in its positive radiating element 2 and microstrip-fed unit 3 of forming; Form ground unit 4 at its back side; Wherein: the semicircle radius of radiating element 2 is 4.5mm, and the semicircle radius in the ground unit 4 is 7.5mm, and the semicircle center of circle of radiating element and the semicircle distance of center circle of ground unit are from being 2.8 millimeters.
Fig. 4 is the aerial voltage standing-wave ratio curve of the aforementioned specific embodiment of emulation and actual measurement, adopts Agilent E8353B vector network analyzer in the actual measurement.Can find out by Fig. 4; The operating frequency range (VSWR＜2: 1) of actual measurement is 3.0GHz～10.8GHz; The operating frequency range of emulation is greater than the scope of actual measurement; Emulation and measured data surface antenna of the present invention has been realized the ultra broadband characteristic really, and antenna obtains good impedance matching effect in the ultra broadband working frequency range of 3.1GHz～10.6GHz.
Fig. 5 be the transfer function amplitude of aforementioned specific embodiment of actual measurement with the curve of frequency change, can find out that by Fig. 5 in 3.4GHz～10.4GHz scope, the transfer function range value must change in 10dB.The overall magnitude that antenna is described is more smooth, and the variation of gain is less in the working frequency range simultaneously.Be very beneficial for the transmission of ultra-broadband signal.Fig. 6 is the curve of the transfer function phase place of actual measurement with frequency change, can find out that the phase characteristic of transfer function is linear distribution approx, and the interference of antenna pulse signals is less.
In sum, antenna of the present invention has good voltage standing wave ratio, smooth gain and linear transmission function phase place in ultra wide band range, is fit to very much the transmission of ultra-broadband signal.This antenna adopts print structure, and volume is little, and complanation helps the processing and fabricating and the system integration, is suitable for the super broad band radio communication field.
Claims (3)
1. the ultra-wideband antenna of a miniaturization; Comprise: dielectric-slab, be arranged at the radiating element, ground unit and the feed element that constitute by electric conductor on the dielectric-slab; And the microwave junction that joins with coaxial cable; It is characterized in that: used dielectric-slab (1) is made up of the material of low-k; The front of dielectric-slab (1) is provided with the semicircle radiating element (2) of a coincident of its semicircle straight flange and dielectric-slab; Radiating element (2) links to each other with feed element (3); The back side of dielectric-slab (1) is provided with the ground unit (4) that has semicircle saddle type concave shape, and be positioned at the positive feed element (3) of dielectric-slab and join through the worn-out lead of screen, the SMIS lead of microwave junction (5) and coaxial cable respectively with the ground unit (4) that is positioned at the dielectric-slab back side, and: the straight flange of the semicircle saddle type concave shape of ground unit (4) overlaps with the straight flange of the semicircle radiating element (2) of the front of dielectric-slab (1) setting; The semicircle saddle type concave shape of the ground unit at the dielectric-slab back side (4) includes the positive semicircle radiating element (2) of dielectric-slab in the positive projection of dielectric-slab; The radius R of radiating element (2) semicircle
1Radius R with the semicircle saddle type indent of ground unit (4)
2Ratio equal 5～9: 7～17; Dielectric-slab is: length>=(2R
2+ 1 millimeter), width>=(R
2+ 1/2 millimeter) rectangle.
2. the ultra-wideband antenna of a kind of miniaturization according to claim 1 is characterized in that the printed circuit board (PCB) of described dielectric-slab (1) for the two-sided deposited copper of rectangle, reaches the Copper Foil reservation that feed element (3) is located in its positive semicircle radiating element (2); Copper Foil in the semicircle of the ground unit at its back side (4) semicircle saddle type concave shape is removed, and keeps the Copper Foil of remainder.
3. the ultra-wideband antenna of a kind of miniaturization according to claim 2 is characterized in that dielectric-slab wide is 10 millimeters, and length is 20 millimeters, R
1Be 4.5 millimeters, R
2Be 7.5 millimeters, the semicircle center of circle of radiating element and the semicircle distance of center circle of ground unit are from being 2.8 millimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103661854A CN102509877A (en) | 2011-11-18 | 2011-11-18 | Small-sized ultra-wide band antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103661854A CN102509877A (en) | 2011-11-18 | 2011-11-18 | Small-sized ultra-wide band antenna |
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| Publication Number | Publication Date |
|---|---|
| CN102509877A true CN102509877A (en) | 2012-06-20 |
Family
ID=46221942
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103661854A Pending CN102509877A (en) | 2011-11-18 | 2011-11-18 | Small-sized ultra-wide band antenna |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102956968A (en) * | 2012-11-07 | 2013-03-06 | 山西大学 | Broadband and dual-band microstrip antenna based on part arc-shaped ground |
| CN103151610A (en) * | 2013-03-20 | 2013-06-12 | 北京交通大学 | Small unsymmetrical plane ultra-wideband antenna |
| CN104638369A (en) * | 2014-12-25 | 2015-05-20 | 中国电子科技集团公司第七研究所 | Ultra-wideband semi-cut circular slot MIMO (Multiple Input Multiple Output) antenna |
| CN104779434A (en) * | 2015-04-01 | 2015-07-15 | 广东顺德中山大学卡内基梅隆大学国际联合研究院 | Anti-interference WiFi (wireless fidelity) dielectric printed antenna |
| CN104810624A (en) * | 2015-04-17 | 2015-07-29 | 重庆大学 | Compact ultra wide band antenna of asymmetric coplane strip line feed |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050156788A1 (en) * | 2004-01-15 | 2005-07-21 | Ding-Fu Lin | Ultra wideband planar printed volcano antenna |
| KR100962930B1 (en) * | 2008-09-01 | 2010-06-10 | 강원대학교산학협력단 | Ultra-wide-band antenna having quarter-slot and method for manufacturing the same |
-
2011
- 2011-11-18 CN CN2011103661854A patent/CN102509877A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050156788A1 (en) * | 2004-01-15 | 2005-07-21 | Ding-Fu Lin | Ultra wideband planar printed volcano antenna |
| KR100962930B1 (en) * | 2008-09-01 | 2010-06-10 | 강원대학교산학협력단 | Ultra-wide-band antenna having quarter-slot and method for manufacturing the same |
Non-Patent Citations (1)
| Title |
|---|
| H.SCHANTZ.: "A Brief History of UWB Antennas", 《AEROSPACE AND ELECTRONIC SYSTEMS MAGAZINE》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102956968A (en) * | 2012-11-07 | 2013-03-06 | 山西大学 | Broadband and dual-band microstrip antenna based on part arc-shaped ground |
| CN103151610A (en) * | 2013-03-20 | 2013-06-12 | 北京交通大学 | Small unsymmetrical plane ultra-wideband antenna |
| CN103151610B (en) * | 2013-03-20 | 2016-01-20 | 北京交通大学 | A kind of miniaturized unsymmetrical plan ultra-wideband antenna |
| CN104638369A (en) * | 2014-12-25 | 2015-05-20 | 中国电子科技集团公司第七研究所 | Ultra-wideband semi-cut circular slot MIMO (Multiple Input Multiple Output) antenna |
| CN104779434A (en) * | 2015-04-01 | 2015-07-15 | 广东顺德中山大学卡内基梅隆大学国际联合研究院 | Anti-interference WiFi (wireless fidelity) dielectric printed antenna |
| CN104810624A (en) * | 2015-04-17 | 2015-07-29 | 重庆大学 | Compact ultra wide band antenna of asymmetric coplane strip line feed |
| CN104810624B (en) * | 2015-04-17 | 2017-09-22 | 重庆大学 | A kind of compact ultra-wideband antenna of asymmetric coplanar stripline feed |
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Application publication date: 20120620 |