CN102064384A - Ultra-wideband antenna - Google Patents
Ultra-wideband antenna Download PDFInfo
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- CN102064384A CN102064384A CN2010105334814A CN201010533481A CN102064384A CN 102064384 A CN102064384 A CN 102064384A CN 2010105334814 A CN2010105334814 A CN 2010105334814A CN 201010533481 A CN201010533481 A CN 201010533481A CN 102064384 A CN102064384 A CN 102064384A
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Abstract
The invention provides an ultra-wideband antenna. The ultra-wideband antenna comprises a dielectric substrate, wherein a radiation unit, a feeding structure and a ground plane are printed on the dielectric substrate; the radiation unit is a forked chip; the feeding structure is a coplanar waveguide feeding structure; and the ground plane is a coplanar waveguide ground plane. The ultra-wideband antenna has a coplanar waveguide structure, so that a single planar printed antenna structure can be realized; the ultra-wideband antenna can be easily integrated with a microwave integrated circuit; the coplanar waveguide ground plane can serve as the ground plane of the whole antenna, and particularly for the coplanar waveguide structure with a wideband slot structure, wideband work can be realized, and the electromagnetic interference of outside on the antenna can be effectively avoided; and wideband impedance bandwidth can be easily realized, and the efficiency of the antenna is improved, so that higher antenna gain can be achieved.
Description
Technical field
What the present invention relates to is a kind of ultra-wideband antenna, and this antenna can be used for accepting and emitting radio wave.
Background technology
Because radio communication equipment and electronic message unit be towards multifunction, miniaturization, ultra broadband and the friendly direction of coordinating with surrounding environment develop, and this makes broadband, miniaturization, high-gain becomes one of hot subject of domestic and international research.In recent years, do not need to hole and be easy to integrated coplanar waveguide structure and make rapid progress, and this structure can be by taking a picture or photoetching technique is made, and polarization characteristic is preferably arranged, so in the design of the design that has been applied in ultra-wideband antenna of this technology and relevant microwave circuit components and parts.Yet frequency band that present ultra-wideband communications is shared and WLAN (wireless local area network) have shared part, therefore need the antenna of design to reduce, even can not bring interference, therefore design the focus that the ultra-wideband antenna that has trap characteristic becomes present research to wireless local area.If there is not suitable design to suppress harmonic resonance and parasitic emission, such antenna will produce electromagnetic interference near equipment, jeopardize the operate as normal of system itself and neighbor systems, particularly the wireless local area network (WLAN) system to present use causes serious disturbance.Traditional mode is to add the method that filter is the most normal use, and the interpolation suitable filters solves between antenna element and radio frequency component system finishes after.Common this method can cause antenna and microwave circuit not to match, even lowers the overall efficiency of system, and therefore designing the ultra-wideband antenna that has trap characteristic is one of important method of head it off.Solve some shortcomings of existing ultra-wideband antenna simultaneously: (1) present ultra-wideband antenna great majority are the monopole antennas that adopt microstrip-monopole sub antenna or coplanar wave guide feedback, and the size of these antenna is relatively large.Though can satisfy the application demand of UWB (3.1GHz-10.6GHz) in recent years based on the ultra-wideband antenna of notch antenna, the feeding classification more complicated of these antenna is not easy to actual debugging and production.(2) present most of ultra-wideband antenna needs boring usually when the system integration, modes such as use reactance component are connected with radio-frequency front-end, therefore increase the complexity of system, have reduced the usefulness of system, can not satisfy the demand of miniaturization.(3) present ultra-wideband antenna, great majority are the application demands that only satisfy UWB (3.1GHz-10.6GHz), application that can not compatible WLAN (2.4GHz-2.483GHz).(4) in recent years, the great majority that academia proposes have the ultra-wideband antenna of trap characteristic, mostly be to adopt on ground plane and radiating element the various grooves of etching to realize trap characteristic, so the leakage that can generate electromagnetic waves of the groove of etching, influence the antenna pattern of antenna.
Traditional printing ultra-wideband antenna mainly is cone antenna and printing discone antenna, in order to reduce volume, Chinese patent " a ultra broadband ladder floor printing monopole antenna; application numbers 2005100242288.7 " has been set forth a kind of ultra-wideband antenna based on notch cuttype ground plate and oval radiating element, but the limited bandwidth of this antenna, still can not satisfy the application of UWB, and can not overcome the electromagnetic interference problem of UWB and WLAN.Document " Harmonic Control For An Integrated Microstrip AntennaWith Loaded Transmission Line; Shun-Yun Lin; Kuang-Chih Huang; and Jin-Sen Chen.MicrowaveAnd Optical Technology Letters; Vol.44; No.4, February, 2005 "; propose a kind of periodic structure that utilizes and suppress harmonic wave, adopt extra periodic filter structure to produce trap characteristic, realize the collaborative work of UWB and WLAN; but volume is bigger, and complex structure.In order to overcome above-mentioned shortcoming, document " Design of a 5.8-GHz Antenna Incorporating a NewPatch Antenna; Ching-Hong K.Chin; Quan Xue; Chi Hou Chan; IEEE Antennas And WirelessPropagation; Vol.4,2005 "; set forth the method for etching filter on the coplanar wave guide feedback holding wire, produce the characteristic of trap, but volume is still bigger; can not well realize the miniaturization Design of system, and the making of this antenna requires higher relatively.Document " A miniaturized monopole antenna for ultra-wide band applications with band-notch Filter; B.Ahmadi; R.Faraji-Dana, IET Microw.Antennas Propag., 2009; Vol.3; No.14, pp.1224-1231. " has been set forth the ultra-wideband antenna that has trap characteristic of etching U-lag and V-shaped groove, but volume is bigger, and adopt the gradual change feed structure, make troubles for design and debugging.Document " Compact CPW-fed ultra-wideband antenna with dualband-notched characteristics; Y.S.LI; X.D.Yang; C.Y.Liu; T.Jiang; Electronics Letters, 2010, vol.46, No.14 ", adopt etching inverted U-channel on the radiation source unit and on the co-planar waveguide ground plane etching H shape groove; produce trap characteristic; this antenna adopts the form of etching groove on the co-planar waveguide ground plane, makes the part electromagnetic wave leak, and influences the antenna pattern of antenna.
Summary of the invention
The object of the present invention is to provide a kind of simple in structure, the work zone is wide, be convenient to produce in batches, and ultra-wideband antenna with low cost.
Comprise medium substrate, be printed with radiating element, feed structure and ground plane at medium substrate, radiating element is the fork-shaped paster, and feed structure is the coplanar wave guide feedback structure, and ground plane is the co-planar waveguide ground plane.
The present invention can also comprise:
1, a tuning microstrip line is set in the middle of the fork-shaped radiating element.
2, fall L shaped groove in that the etching of the left side of co-planar waveguide ground plane and the right symmetry is a pair of.
3, the coplanar wave guide feedback structure is tuning microstrip line, the microstrip line of microstrip line that described tuning microstrip line is a rectangular configuration and I shape structure.
The invention belongs to the monopole antenna of coplanar wave guide feedback, this antenna is printed on the medium substrate, its radiating element is the fork-shaped paster, adopt the coplanar wave guide feedback structure, simultaneously the etching of symmetry is a pair of on the ground plane on the co-planar waveguide left side and the right falls L shaped groove, thereby effectively increase the impedance bandwidth of antenna, make designed antenna can cover WLAN (2.4GHz-2.483GHz) and UWB communication bandwidth; In the middle of the fork-shaped radiating element, insert a tuning microstrip line simultaneously, thereby produce a notch bandwidth, realize the collaborative work of UWB and WLAN (5.15GHz-5.825GHz).This antenna has good impedance bandwidth and trap characteristic, and is simple in structure, and the centre frequency of notch bandwidth can regulate, and therefore increased its scope of application greatly.The present invention adopts printed antenna structure and coplanar waveguide structure, greatly reduces antenna volume, and more integrated than being easier to the radio-frequency front-end microwave integrated circuit.Tuning microstrip line can adopt the microstrip line of rectangular configuration and the microstrip line of I shape structure, adopts these structures can further dwindle the size of antenna, realizes the miniaturization of antenna, can effectively produce notch bandwidth simultaneously, suppresses unwanted frequency band.
In order to adopt single plane printed antenna structure, and can satisfy the impedance operator demand of its ultra broadband simultaneously, the present invention adopts following several measure:
1, adopts on co-planar waveguide ground plane etching to fall the structure of L shaped groove, increase the flow through current length of ground plane of electric current, further increase the impedance bandwidth of antenna.
2, utilize the form of co-planar waveguide to realize single plane printed antenna structure, also be convenient to microwave integrated circuit integrated simultaneously.
3, adopt the co-planar waveguide ground plane be enclosed in radiating element around so that in ultra wide band range, can realize impedance matching property preferably with sub-miniature A connector.
4, adopt tuning open circuit microstrip line form, realize trap characteristic, thereby effectively reduce antenna volume.
Use the advantage of coplanar waveguide structure:
1, adopts coplanar waveguide structure, can realize single plane printed antenna structure.
2, adopt coplanar waveguide structure, can be integrated with microwave integrated circuit easily.
3, adopt coplanar waveguide structure, the ground plane of co-planar waveguide can serve as the ground plane of entire antenna, particularly for the coplanar waveguide structure of broadband groove structure, not only can realize wideband operation, and also can effectively avoid outer the electromagnetic interference to this antenna.
4, adopt coplanar waveguide structure can realize broadband impedance bandwidth easily, and help improving the efficient of antenna, thereby obtain higher antenna gain.
The present invention compared with prior art has significant advantage to be:
1, the present invention can realize wideer impedance bandwidth, and this ultra-wideband antenna adopts the L shaped groove that falls of on the co-planar waveguide ground plane a pair of symmetry of etching, and this effectively increases the length of the electric current on the surface of flowing through to falling L shaped groove, thereby increases the impedance bandwidth of antenna.This ultra-wideband antenna can cover the impedance bandwidth of 2.38GHz-11.6GHz, produces a notch bandwidth simultaneously in the WLAN frequency range, suppresses the potential interference of WLAN, realizes the collaborative work of UWB and WLAN;
2, the designed ultra-wideband antenna of the present invention is printed on same one side on the medium substrate, adopts the fork-shaped radiating element, is similar to the form of dipole, helps the design of antenna radiation unit;
3, adopt broadband groove project organization, on the ground plane of co-planar waveguide, cut out a rectangular channel, form broadband groove structure, effectively increase the impedance bandwidth of antenna, simultaneously the effectively coupling between enhanced rad unit and the co-planar waveguide ground plane.The broadband groove surrounds radiating element simultaneously, helps reducing electromagnetic interference;
4, adopt the coplanar wave guide feedback structure, be convenient to broadening impedance bandwidth;
5, the present invention introduces Design of Filter theoretical and technology and open circuit/short circuit microstrip line regulation technology.Between the fork-shaped paster of radiating element, insert a tuning microstrip line, produce trap characteristic.The present invention adopts the microstrip line of open circuit, regulates the centre frequency and the bandwidth of trap.This structure is saved Filter Design, reduces the complexity of design cost and system, improves the overall efficiency of system simultaneously, has also dwindled overall volume;
6, adopt tuning microstrip line to produce notch bandwidth, avoid etching groove on radiating element and ground plane, thereby avoid electromagnetic leakage, effectively improve the radiation characteristic of antenna.And this antenna structure is simple, compactness, and volume is little, and is easy to process, and cost is low.
Description of drawings
Fig. 1 is the basic structure vertical view of the invention process example 1;
Fig. 2 is the basic structure front view of the invention process example 1;
Fig. 3 is the stationary wave characteristic curve of the invention process example 1 of test;
Fig. 4 is the antenna pattern of the invention process example 1 of test at 4GHz;
Fig. 5 for the test the invention process example 1 at GHz surface radiation directional diagram;
Fig. 6 for the test the invention process example 1 at 9.5GHz surface radiation directional diagram;
Fig. 7 is the vertical view of the basic structure of the invention process example 2;
Fig. 8 is the standing wave curve of the invention process example 2;
Fig. 9 is the vertical view of the basic structure of the invention process example 3.
Embodiment
Giving an example below in conjunction with accompanying drawing, this is done in more detail invention and describes:
Embodiment 1:
An example of the present invention as depicted in figs. 1 and 2.It has medium substrate 107, radiating element 104, coplanar wave guide feedback signal band line 106, tuning microstrip line 103, and 101, two of sipes fall L shaped groove 105 and co-planar waveguide ground plane 102 and form.The lower end of the coplanar wave guide feedback signal band line 106 of this antenna is connected with the SMA inner wire.The outer conductor of SMA ground roll together connects ground 102 connections.According to structure illustrated in figures 1 and 2,, just can satisfy its ultra broadband operating characteristic and trap characteristic as long as select suitable dimensions.
The setting of parameter:
1, tuning microstrip line
The trap characteristic of this antenna mainly inserts a tuning microstrip line of open circuit and realizes that this tuning microstrip line is equivalent to a band stop filter between the fork-shaped radiating element, at tuning bandwidth of frequency band generation of a certain needs.According to relevant microwave theory and open circuit/short circuit microstrip line theory, the length of this tuning microstrip line is about 1/4 of designed notch bandwidth centre frequency.And the effective wavelength of notch bandwidth centre frequency can adopt λ
n=c/ (f
nε
Eff) calculate.Wherein c is the light velocity, f
nBe the centre frequency of trap, effective dielectric constant ε
Eff≈ (ε
r+ 1)/2.Because this tuning microstrip line is to harmonic wave bandwidth and trap frequency decisive role, can be when therefore designing again according to design requirement, it is optimized, simultaneously, the present invention adopts the form of tuning microstrip line, avoid the form of etching groove on radiating element or ground plane to realize trap characteristic, so this structure can effectively be improved the radiation characteristic of antenna.
2, fall the design of L shaped groove
CURRENT DISTRIBUTION according to this antenna, one of each etching is fallen L shaped groove about the co-planar waveguide ground plane, this structure can effectively change the electric current degree of the co-planar waveguide ground plane of flowing through, thereby increase the impedance bandwidth of antenna, make this antenna can cover 2.38GHz-11.6GHz, satisfy the application demand of UWB and 2.4GHz.
3, the design of co-planar waveguide
Entire antenna is 50 Ω in the impedance of the feed structure of co-planar waveguide, and the ground plane of co-planar waveguide adopts the structure around radiation patch, therefore partly adopts inconsistent width at mid portion and upper and lower side, is of value to the coupling of impedance.The thickness and the dielectric constant of the conduction band width of the impedance of co-planar waveguide and co-planar waveguide electric feed signal band line 106 and the slit of length and co-planar waveguide ground plane and radiating element, medium substrate 107 are relevant, as long as change a parameter, and the just characteristic impedance of energy line on another day of other parameter inconvenience.Can also utilize computing formula commonly used to calculate the characteristic impedance of co-planar waveguide for this reason.
4, the selection of medium substrate
Generally between 2-9.8, the dielectric constant that the present invention adopts is 2.65 polyfluortetraethylene plate to the dielectric constant of medium substrate, and this substrate price is lower, and loss is less, based on above-mentioned requirements.In practice, can adopt the little medium substrate of dielectric constant loss angle according to practical application, as the dielectric constant loss angle less than 10
-2Substrate.The thickness of the medium substrate that the present invention adopts is 1.6mm, satisfies required intensity.
5, the jointing of antenna can adopt N connector or sub-miniature A connector, will select according to producing.
Fig. 3 is the standing-wave ratio curve of test, (≤2: impedance bandwidth 1) is 2.38-11.6GHz in standing-wave ratio as can be seen from figure, satisfy the demand of ultra-wideband communications, a trap characteristic is arranged between 5-6GHZ, can eliminate or reduce the electromagnetic interference of ultra-wideband antenna WLAN (wireless local area network).
Embodiment 2:
As shown in Figure 7, another kind of embodiment of the present invention is that this antenna does not have two to fall L shaped groove, this antenna radiation unit 204, coplanar wave guide feedback signal band line 206, tuning microstrip line 203, and sipes 201 is formed.It is on 2.65 the medium substrate that entire antenna is printed on dielectric constant.The lower end of the coplanar wave guide feedback signal band line 206 of this antenna is connected with the SMA inner wire.The outer conductor of SMA ground roll together connects ground 202 connections.According to structure shown in Figure 7,, just can satisfy its ultra broadband operating characteristic and trap characteristic as long as select suitable dimensions.The trap characteristic of this antenna is still realized by tuning microstrip line, by length and the width of regulating tuning microstrip line, can be regulated the centre frequency of trap and the bandwidth of trap.
Embodiment 3:
As shown in Figure 9, another kind of embodiment of the present invention is that radiating element directly is made of the fork-shaped paster, does not have two to fall L shaped groove and tuning microstrip line.This antenna radiation unit 304, coplanar wave guide feedback signal band line 306, sipes 301 are formed.It is on 2.65 the medium substrate that entire antenna is printed on dielectric constant.The lower end of the coplanar wave guide feedback signal band line 306 of this antenna is connected with the SMA inner wire.The outer conductor of SMA ground roll together connects ground 302 connections.According to structure shown in Figure 9,, just can satisfy its ultra broadband operating characteristic as long as select suitable dimensions.
Claims (5)
1. a ultra-wideband antenna comprises medium substrate, is printed with radiating element, feed structure and ground plane at medium substrate, it is characterized in that: radiating element is the fork-shaped paster, and feed structure is the coplanar wave guide feedback structure, and ground plane is the co-planar waveguide ground plane.
2. a kind of ultra-wideband antenna according to claim 1 is characterized in that: a tuning microstrip line is set in the middle of the fork-shaped radiating element.
3. a kind of ultra-wideband antenna according to claim 1 and 2 is characterized in that: fall L shaped groove in that the etching of the left side of co-planar waveguide ground plane and the right symmetry is a pair of.
4. a kind of ultra-wideband antenna according to claim 1 and 2 is characterized in that: the coplanar wave guide feedback structure is tuning microstrip line, the microstrip line of microstrip line that described tuning microstrip line is a rectangular configuration and I shape structure.
5. a kind of ultra-wideband antenna according to claim 3 is characterized in that: the coplanar wave guide feedback structure is tuning microstrip line, the microstrip line of microstrip line that described tuning microstrip line is a rectangular configuration and I shape structure.
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| CN2010105334814A CN102064384A (en) | 2010-11-05 | 2010-11-05 | Ultra-wideband antenna |
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| CN2010105334814A CN102064384A (en) | 2010-11-05 | 2010-11-05 | Ultra-wideband antenna |
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Cited By (23)
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| CN102299420A (en) * | 2011-06-17 | 2011-12-28 | 哈尔滨工程大学 | Annular multiple-wave-trap ultra-wideband antenna |
| CN102299419A (en) * | 2011-06-17 | 2011-12-28 | 哈尔滨工程大学 | UWB (ultra-wideband) antenna based on Cantor set fractal structure |
| CN102655271A (en) * | 2012-05-21 | 2012-09-05 | 江苏联海通信技术有限公司 | Microstrip antenna and directional antenna comprising same |
| CN102738580A (en) * | 2012-07-03 | 2012-10-17 | 浙江大学 | Ultra-wideband monopole antenna with expanded horizontal plane open circuit section and semi-oval slot |
| CN103094683A (en) * | 2013-01-29 | 2013-05-08 | 郑州联睿电子科技有限公司 | Super-wide band antenna with notching characteristic |
| CN103682644A (en) * | 2013-11-29 | 2014-03-26 | 中国计量学院 | Multi-E-shaped double-frequency printing slot antenna |
| CN103794875A (en) * | 2014-01-18 | 2014-05-14 | 中国计量学院 | Symmetrical semicircle opening-groove-shaped double-frequency coplane microstrip patch antenna |
| CN103915682A (en) * | 2013-01-06 | 2014-07-09 | 华为技术有限公司 | Printed circuit board antenna and printed circuit board |
| CN104022357A (en) * | 2014-05-20 | 2014-09-03 | 广东工业大学 | Multiband ultra-wideband antenna |
| CN104659477A (en) * | 2013-11-20 | 2015-05-27 | 王新明 | Thin film antenna structure and manufacturing method thereof |
| CN106299665A (en) * | 2016-09-23 | 2017-01-04 | 厦门大学 | There is the plane trident shape ultra-wideband antenna of trap characteristic |
| CN107046178A (en) * | 2017-03-04 | 2017-08-15 | 深圳市景程信息科技有限公司 | Frequency and directional diagram reconstructable slot antenna |
| CN107425278A (en) * | 2017-08-09 | 2017-12-01 | 华南理工大学 | The square slot ultra wideband antenna of coplanar wave guide feedback |
| CN108110415A (en) * | 2017-12-14 | 2018-06-01 | 东华大学 | A kind of compact double frequency round polarized microstrip antenna |
| WO2018161599A1 (en) * | 2017-03-04 | 2018-09-13 | 深圳市景程信息科技有限公司 | Reconfigurable slot antenna based on fork-shaped structure |
| CN109273832A (en) * | 2018-11-21 | 2019-01-25 | 合肥职业技术学院 | A kind of U-shaped monopole antenna being placed back to back |
| CN110247181A (en) * | 2019-06-28 | 2019-09-17 | 河南师范大学 | A kind of small-size high-gain antenna |
| CN110943290A (en) * | 2019-12-17 | 2020-03-31 | 上海隧道工程股份有限公司 | Underground communication coplanar waveguide feed broadband microstrip antenna |
| DE102019205556A1 (en) * | 2019-04-17 | 2020-10-22 | BSH Hausgeräte GmbH | PCB antenna |
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| CN102299420A (en) * | 2011-06-17 | 2011-12-28 | 哈尔滨工程大学 | Annular multiple-wave-trap ultra-wideband antenna |
| CN102655271A (en) * | 2012-05-21 | 2012-09-05 | 江苏联海通信技术有限公司 | Microstrip antenna and directional antenna comprising same |
| CN102738580A (en) * | 2012-07-03 | 2012-10-17 | 浙江大学 | Ultra-wideband monopole antenna with expanded horizontal plane open circuit section and semi-oval slot |
| CN102738580B (en) * | 2012-07-03 | 2014-05-21 | 浙江大学 | Ultra-wideband monopole antenna with expanded horizontal plane open circuit section and semi-oval slot |
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| CN106299665A (en) * | 2016-09-23 | 2017-01-04 | 厦门大学 | There is the plane trident shape ultra-wideband antenna of trap characteristic |
| CN106299665B (en) * | 2016-09-23 | 2022-10-28 | 厦门大学 | Planar trident-shaped ultra-wideband antenna with trapped wave characteristic |
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| CN107046178B (en) * | 2017-03-04 | 2018-11-20 | 深圳市景程信息科技有限公司 | Frequency and directional diagram reconstructable slot antenna |
| CN107425278A (en) * | 2017-08-09 | 2017-12-01 | 华南理工大学 | The square slot ultra wideband antenna of coplanar wave guide feedback |
| CN108110415A (en) * | 2017-12-14 | 2018-06-01 | 东华大学 | A kind of compact double frequency round polarized microstrip antenna |
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| CN112018510A (en) * | 2019-05-31 | 2020-12-01 | 杭州海康威视数字技术股份有限公司 | Ultra-wideband antenna |
| CN112018510B (en) * | 2019-05-31 | 2023-02-03 | 杭州海康威视数字技术股份有限公司 | Ultra-wideband antenna |
| CN110247181A (en) * | 2019-06-28 | 2019-09-17 | 河南师范大学 | A kind of small-size high-gain antenna |
| CN110247181B (en) * | 2019-06-28 | 2021-11-30 | 河南师范大学 | Small-size high-gain antenna |
| CN110943290A (en) * | 2019-12-17 | 2020-03-31 | 上海隧道工程股份有限公司 | Underground communication coplanar waveguide feed broadband microstrip antenna |
| CN113113757A (en) * | 2021-04-13 | 2021-07-13 | 福耀玻璃工业集团股份有限公司 | Vehicle window and vehicle |
| CN113113757B (en) * | 2021-04-13 | 2023-06-06 | 福耀玻璃工业集团股份有限公司 | Vehicle window and vehicle |
| CN113594673A (en) * | 2021-07-15 | 2021-11-02 | 东华大学 | Composite microwave substrate flexible antenna attached to life jacket |
| CN113871850A (en) * | 2021-08-19 | 2021-12-31 | 北京邮电大学 | Ridge gap waveguide feed microwave millimeter wave dual-frequency broadband super-surface antenna |
| CN113871850B (en) * | 2021-08-19 | 2023-01-20 | 北京邮电大学 | Ridge gap waveguide feed microwave millimeter wave dual-frequency broadband super-surface antenna |
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Application publication date: 20110518 |