CN101752665A - UWB (ultra wide band) antenna with band-stop characteristic - Google Patents
UWB (ultra wide band) antenna with band-stop characteristic Download PDFInfo
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Abstract
The invention provides a UWB (ultra wide band) antenna with the band-stop characteristic, which is composed of a U-shaped DGS (defected ground structure), a CPW (coplanar waveguide), a fan-shaped radiation chip, an FR4 medium substrate, a coaxial joint and a trapezoidal metal floor. The U-shaped DGS is symmetrically etched on the trapezoidal metal floor so as to lead the antenna to generate the band-stop characteristic. The CPW effectively utilizes the trapezoidal metal floor which is used not only as a main component of the antenna radiation but also as the floor of the CPW. The UWB antenna can meet the requirements of the UWB technology for impedance, and realizes good band-stop characteristic within 5 to 6GHz. By adopting the DGS, the UWB antenna realizes the new way of thinking of the band-stop antenna. The UWB antenna has the characteristics of good miniaturization, simple as well as compact structure, convenient processing, easy integration with an active circuit and good application prospect.
Description
Technical field
The present invention relates to a kind of ultra broadband (UWB) antenna that has band resistance characteristic in 5～6GHz frequency range, can be applicable to the terminal of various ultra wide band radios equipment, but again near systems such as WLAN (wireless local area network) are not produced interference simultaneously.
Background technology
Ultra-wideband antenna in the application of civil area and military domain more and more widely, especially after in February, 2002 FCC (FCC) approval is used for civilian ultra-wideband communication system with the frequency range of 3.1～10.6GHz.
The antenna that tradition is applied to the UWB system generally comprises horn antenna, biconical antenna or the like.But these antenna is not suitable for the small and light field of antenna of current needs owing to size is huge.G.Dubost and S.Zisler have at first proposed planar monopole antenna in 1976, scientific worker both domestic and external has subsequently done a large amount of research to the super wide band plane unipole antenna.But, increased the structure of antenna, and be not easy to active circuit integrated because this type of antenna needs a perpendicular floor.For this reason, a kind of planographic unipole antenna of novel structure is by extensive studies in recent years, and document has the clock up time, Liang Xianling, prolong honor etc. dawn people " super-wide-band flat antenna technology " (the electric wave science journal, vol.22, No.2,2007, pp.308-315).
The UWB antenna is very wide because of its bandwidth, and transmitting power is less relatively again, thereby can interfere with each other with contiguous narrow radio frequency system inevitably.As be usually used in the IEEE802.11a frequency range of WLAN (wireless local area network) WLAN, its scope is 5.15GHz～5.850GHz, easily and the civilian ultra broadband of 3.1GHz～10.6GHz that proposes of FCC produce interference.For fear of interference, additionally do not increase filter again, need make ultra-wideband antenna self have the function of band resistance.Patent " ultra-wideband antenna " application number 200680013917.9 with band resistance characteristic, publication number CN 101164199A, disclose and a kind ofly made antenna have the function of band resistance by fluting on radiation patch, document " Sanh-Ho Lee, Jung-Woo Baik, and Young-Sik Kima, coplanarwaveguide fed monopole ultra-wideband antenna having band-notched frequency function by twofolded-striplines " (Microwave Opt.Tech.Lett., vol.49, no.11,2007, pp.2747-2750) belt-resistance function that a kind of metal patch by parasitic two L types at the dielectric-slab back side is realized ultra-wideband antenna is disclosed.
Summary of the invention
The objective of the invention is to propose a kind of novel ultra-wideband antenna, not only satisfied the ultra broadband requirement that FCC proposes, and realized belt-resistance function, avoided the phase mutual interference between system at 5～6GHz with band resistance characteristic.This antenna structure is simple, is easy to processing, is convenient to active circuit integrated.
Design of the present invention is as follows: the present invention can think the ground of the defective in the filter (DGS) structure is combined with ultra-wideband antenna, realizes the band resistance characteristic of ultra-wideband antenna.The defect ground structure (DGS defectedground structure) that is proposed by people such as Korea S scholar J.I.Park develops from photonic band gap structure the earliest, it be ground plane artificial etch defect pattern, to change the distribution of circuitry substrate material effective dielectric constant, thereby change the distribution of earth current, change transmission characteristic.In passive circuit, band resistance characteristic and slow wave characteristic based on DGS can be used to the high impedance microstrip line of constructing filter and compacting.Compare with conventional method, the DGS Structure Filter need not to add element, can realize the band resistance.In the present invention this structure is combined with the planographic unipole antenna,, realizes the belt-resistance function of ultra-wideband antenna by etching defect pattern on the antenna ground plate, make antenna have miniaturization, simple in structure, be convenient to and advantages such as active circuit is integrated.
According to the foregoing invention design, the present invention adopts following technical proposals:
A kind of ultra-wideband antenna with band resistance characteristic comprises fan beam paster, coplane metal floor, embedded feed line and FR4 medium substrate.It is characterized in that: U-shaped DGS structure is arranged in the described coplane floor; Radiation patch, metal floor, feed system and DGS structure are all in the same side of medium substrate, and be simple and compact for structure, and cost is low and be convenient to integrated with active circuit.
Described trapezoidal metal floor and embedded feed line have constituted the feeding classification of co-planar waveguide, and this feeding classification makes the metal floor of antenna just can be used as the floor of co-planar waveguide, is convenient to active circuit integrated; It is little to have loss, helps improving the efficient of antenna; Be convenient to realize advantages such as impedance matching.
Described U-shaped DGS structure left-right symmetric is distributed in the both sides of embedded feed line, be etched on the trapezoidal grounding plate, its U-lag be about into
ε wherein
rBe the relative dielectric constant of medium substrate, and λ
0Be the centre frequency f of stopband
0Corresponding wavelength.For realizing stopband characteristic at 5～6GHz, flute length is about 16mm～17mm.
Described metal floor adopts up-small and down-big trapezoidal metal patch, about this metal patch is divided into two, places the both sides of embedded feed line.The floor adopts the trapezium structure of this gradual change to be convenient to realize the impedance matching of ultra broadband, thereby makes the standing-wave ratio bandwidth efficient broadening of antenna.
Described radiation patch is fan-shaped paster, also can be circular patch, oval paster or annular paster.
The present invention compared with prior art has following conspicuous outstanding substantive distinguishing features and remarkable advantage: the invention provides a kind of miniaturization, and can be mass-produced and the ultra-wideband antenna that has band resistance characteristic in the WLAN frequency range; The present invention prints radiation patch, trapezoidal metal floor, co-planar waveguide conduction band and etching DGS structure at the monolithic medium substrate on one side, has simple and compact for structurely, and miniaturization is convenient to active circuit integrated; The present invention adopts the DGS structure to realize the mode of band resistance, can control the centre frequency of stopband easily by flute length, and it is convenient to have a design, is easy to processing, and cost is low.
The present invention utilize ultra-wideband antenna that the DGS structure realizes band resistance characteristic at the frequency range standing internal wave of 5～6GHz than greater than 2, have a good frequency resistance section characteristic, in remaining 3～15GHz frequency band, standing-wave ratio is all less than 2.Antenna all can obtain good gain on whole frequency, and gain descends suddenly near the 5GHz frequency range time, causes band resistance characteristic.Directional diagram has the radiation characteristic of approximate omnidirectional in whole frequency range.This antenna is in light weight, and size is little, and simple in structure, compact, easy to process, cost is low, can be used for the terminal antenna of ultra wide band radios equipment such as electronic reconnaissance and electronic jamming, and can be used as short distance ultra-wideband communications antenna etc.
Description of drawings
Fig. 1 is the Facad structure schematic diagram of one embodiment of the invention.
The standing-wave ratio curve comparison diagram that Fig. 2 is an example of the present invention when not having the DGS structure.
Fig. 3 be example of the present invention on different frequency point, the schematic diagram of paster CURRENT DISTRIBUTION.
Fig. 4 be example of the present invention under the different length of U-shaped DGS structure groove, the simulation curve figure of standing-wave ratio and frequency relation.
Fig. 5 is the directional diagram of example of the present invention at different frequency point.
Fig. 6 is the gain curve figure of example of the present invention.
Embodiment
Details are as follows in conjunction with the accompanying drawings for the preferred embodiments of the present invention:
Embodiment one: the present invention have band resistance characteristic ultra-wideband antenna structure chart as shown in Figure 1, present embodiment comprises: be printed on radiation patch 1 and coplane metal floor 5 on the medium substrate 2, radiation patch 1 is fan-shaped metal patch, coplane metal floor 5 is trapezoidal metal floor, and coplane metal floor 5 and embedded feed line 3 constitute co-planar waveguide radiation patch 1 is carried out feed.Etching has symmetrical U type DGS structure 4 on the coplane metal floor 5.The following termination coaxial fitting 6 of co-planar waveguide, coaxial fitting inner wire and co-planar waveguide conduction band join, and the joint outer conductor is connected with coplane metal floor 5.Fan beam paster 1 also can be used circular patch, and oval paster and annulus paster substitute.Unipole antenna plate 1, coplane metallic plate 5, interior feed line 3, U type DGS structure 4 is all in the same side of medium substrate 2.
Embodiment two: present embodiment and embodiment one are basic identical, and special feature is as follows:
In the antenna of present embodiment, radiation patch 1 is main radiant element, is used to obtain the characteristic in broadband, and it can have different shapes such as circle, ellipse.Adjust the distance of 5 of radiation patch 1 and metal floors, the degree of may command bandwidth.Simultaneously, metal ground plate 5 has the impedance matching effect of antenna, and this trapezium structure that becomes gradual change type can be changed the level of impedance match of antenna, thus the broadening bandwidth.
In the antenna of present embodiment,, form defective ground (DGS) structure 4 and obtain stopband characteristic by etching U-lag on trapezoidal metal floor 5.
Fig. 2 is the standing-wave ratio curve chart of the embodiment of the invention.Show among the figure that when the DGS structure was not arranged, antenna was in 3～15GHz frequency range, standing-wave ratio all remains on below 2, so band resistance characteristic do not occur on the WLAN frequency range.Otherwise after additional DGS structure, standing-wave ratio greater than 2, has formed good stopband characteristic at 5～6GHz frequency range place.
Fig. 3 is the current distributing figure that has provided one embodiment of the invention antenna on different frequency point with way of illustration, has illustrated how to obtain band resistance characteristic by groove 4.(c) shown in (d), (3.5GHz, 7.5GHz, 10GHz) locates at passband as Fig. 3 (a), and heavy current is evenly distributed near paster, metal floor and the feed conduction band, does not almost have CURRENT DISTRIBUTION on top, DGS shape slit; And work as at the stopband place, for example when frequency is 5.5GHz (shown in Fig. 3 (b)) distributing near U-shaped DGS slit and comparing the stronger CURRENT DISTRIBUTION of other Frequency points, and in other marginal portion of paster, CURRENT DISTRIBUTION is all very weak.So being introduced in of DGS structure changed the CURRENT DISTRIBUTION on the radiation patch to a great extent on the stopband frequency range, thereby changed transmission characteristic, realized the band resistance.
Fig. 4 is based on the variation of embodiment of the invention DGS slot length and obtains the curve chart of frequency and standing-wave ratio simulation value.By finding out among the figure, along with slot length shortens, the centre frequency of stopband improves; Along with slot length when elongated, the centre frequency of stopband reduces.
Fig. 5 is the directional diagram of present embodiment on different frequency point.As shown in the figure, when frequency was low, the directional diagram of antenna presented good unipole antenna characteristic.Antenna has approximate omnidirectional radiation characteristic at the H mask.E face directional diagram can obtain the directivity near 8 fonts; And when frequency raise, the directional diagram of antenna produced some distortion, and this is owing to the rising with frequency, increases zero point, more reverse current and transverse current occur, thereby caused the directional diagram distortion.But generally, antenna has good approximate omnidirectional radiation characteristic in whole working frequency range, and directional diagram changes little in the whole frequency.
Fig. 6 is the curve chart of embodiment of the invention frequency and gain relationship.As seen from Figure 6, on the whole frequency of 3～15GHz, all can obtain good gain, and gain descends suddenly near the 5GHz frequency range time, thereby cause band resistance characteristic.Therefore, present embodiment has and is applicable to and is producing the UWB antenna characteristics of less interference with WLAN frequency range system.
Claims (6)
1. one kind has the ultra-wideband antenna that band hinders characteristic, comprise medium substrate (2), fan beam paster (1), coplane metal floor (5) and embedded feed line (3), it is characterized in that U-shaped DGS structure (4) is arranged in the described coplane metal floor (5), the radiant body of antenna and metal ground plate are easy to processing and integrated in the same one side of dielectric-slab.Utilize DGS structure (4) to change the distribution of electric current on the ground plate, thereby change transmission characteristic, it is little to make it to have band gap properties and slow wave characteristic and size.
2. according to the described ultra-wideband antenna of right 1, it is characterized in that described U-shaped DGS structure (4) is symmetrical to be etched on the metal floor (5), and its length separately is with band resistance characteristic
ε wherein
rBe the relative dielectric constant of medium substrate (2), and λ
0Be the centre frequency f of stopband
0Corresponding wavelength.
3. according to right 2 described ultra-wideband antennas, it is characterized in that the frequency range of described stopband is in 5～6GHz, solved the interference that the UWB system produces near wlan system with band resistance characteristic.
4. according to right 1 described ultra-wideband antenna, it is characterized in that the distance between described radiation patch (1) and the coplane metal floor (5), influence the input impedance of antenna, the standing-wave ratio bandwidth of may command antenna with band resistance characteristic.
5. according to right 1 described ultra-wideband antenna, it is characterized in that described radiation patch (1) can be fan-shaped paster or oval paster or circular patch or annular paster with band resistance characteristic.
6. according to the described ultra-wideband antenna of right 1, it is characterized in that described metal ground plate (5) is convenient to realize the impedance matching of ultra broadband make the impedance bandwidth of antenna be able to effective broadening for ladder-shape floor with band resistance characteristic.
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| CN201010023119A CN101752665A (en) | 2010-01-21 | 2010-01-21 | UWB (ultra wide band) antenna with band-stop characteristic |
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| CN201010023119A CN101752665A (en) | 2010-01-21 | 2010-01-21 | UWB (ultra wide band) antenna with band-stop characteristic |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102509868A (en) * | 2011-11-18 | 2012-06-20 | 电子科技大学 | Design method for improved ellipse patch ultra-wideband antenna based on micro strip feed |
| CN102723601A (en) * | 2012-06-19 | 2012-10-10 | 北京航空航天大学 | Ultra-wide-band dual-notch paster antenna adopting wide-attenuation-band electromagnetic band gap structure |
| CN103700937A (en) * | 2014-01-09 | 2014-04-02 | 哈尔滨工业大学 | Ultra-wideband omnidirectional radiation printed antenna with band elimination characteristic |
| CN103855466A (en) * | 2014-03-25 | 2014-06-11 | 电子科技大学 | Three-stopband ultra wideband antenna with narrow notch bandwidth |
| TWI467852B (en) * | 2010-12-20 | 2015-01-01 | Univ Nat Kaohsiung Marine | A planar inverted l-shaped monopole antenna with multi-band operation for wimax system |
| CN104901003A (en) * | 2015-05-21 | 2015-09-09 | 北京邮电大学世纪学院 | UWB antenna with band-stop characteristic |
| CN105071030A (en) * | 2015-07-17 | 2015-11-18 | 安徽建筑大学 | Defected ground structure (DGS) asymmetrical coplanar waveguide type tri-band antenna |
| CN106876943A (en) * | 2015-12-12 | 2017-06-20 | 哈尔滨飞羽科技有限公司 | A kind of new dual-attenuation UWB antennas |
| CN106876949A (en) * | 2015-12-14 | 2017-06-20 | 哈尔滨飞羽科技有限公司 | A kind of new Ultrawide-band trap antenna based on the rectangular channel on coupled patch |
| CN108682943A (en) * | 2018-06-15 | 2018-10-19 | 电子科技大学 | The miniature antenna of compatible 5G and Wi-Fi/WiMax frequency ranges |
| CN109449585A (en) * | 2018-11-08 | 2019-03-08 | 南京理工大学 | A kind of compact high-gain dual polarization differential filtering antenna |
| CN110336122A (en) * | 2019-04-18 | 2019-10-15 | 中天宽带技术有限公司 | A kind of paster antenna and electronic equipment |
| CN112751190A (en) * | 2020-12-24 | 2021-05-04 | 航天时代飞鸿技术有限公司 | Flexible antenna based on metamaterial structure and signal transmission device |
| CN113764862A (en) * | 2021-09-03 | 2021-12-07 | 北京有竹居网络技术有限公司 | Antenna and wearable device |
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- 2010-01-21 CN CN201010023119A patent/CN101752665A/en active Pending
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| TWI467852B (en) * | 2010-12-20 | 2015-01-01 | Univ Nat Kaohsiung Marine | A planar inverted l-shaped monopole antenna with multi-band operation for wimax system |
| CN102509868A (en) * | 2011-11-18 | 2012-06-20 | 电子科技大学 | Design method for improved ellipse patch ultra-wideband antenna based on micro strip feed |
| CN102723601A (en) * | 2012-06-19 | 2012-10-10 | 北京航空航天大学 | Ultra-wide-band dual-notch paster antenna adopting wide-attenuation-band electromagnetic band gap structure |
| CN103700937A (en) * | 2014-01-09 | 2014-04-02 | 哈尔滨工业大学 | Ultra-wideband omnidirectional radiation printed antenna with band elimination characteristic |
| CN103700937B (en) * | 2014-01-09 | 2015-12-30 | 哈尔滨工业大学 | There is the ultra wideband omni-directional radiation printed antenna of band-stop response |
| CN103855466A (en) * | 2014-03-25 | 2014-06-11 | 电子科技大学 | Three-stopband ultra wideband antenna with narrow notch bandwidth |
| CN104901003A (en) * | 2015-05-21 | 2015-09-09 | 北京邮电大学世纪学院 | UWB antenna with band-stop characteristic |
| CN104901003B (en) * | 2015-05-21 | 2017-06-16 | 北京邮电大学世纪学院 | A kind of UWB antennas with band-stop response |
| CN105071030B (en) * | 2015-07-17 | 2017-12-26 | 安徽建筑大学 | The frequency-band antenna of defect ground structure asymmetry co-planar waveguide formula three |
| CN105071030A (en) * | 2015-07-17 | 2015-11-18 | 安徽建筑大学 | Defected ground structure (DGS) asymmetrical coplanar waveguide type tri-band antenna |
| CN106876943A (en) * | 2015-12-12 | 2017-06-20 | 哈尔滨飞羽科技有限公司 | A kind of new dual-attenuation UWB antennas |
| CN106876949A (en) * | 2015-12-14 | 2017-06-20 | 哈尔滨飞羽科技有限公司 | A kind of new Ultrawide-band trap antenna based on the rectangular channel on coupled patch |
| CN108682943A (en) * | 2018-06-15 | 2018-10-19 | 电子科技大学 | The miniature antenna of compatible 5G and Wi-Fi/WiMax frequency ranges |
| CN109449585A (en) * | 2018-11-08 | 2019-03-08 | 南京理工大学 | A kind of compact high-gain dual polarization differential filtering antenna |
| CN109449585B (en) * | 2018-11-08 | 2020-05-22 | 南京理工大学 | Compact high-gain dual-polarization differential filtering antenna |
| CN110336122A (en) * | 2019-04-18 | 2019-10-15 | 中天宽带技术有限公司 | A kind of paster antenna and electronic equipment |
| CN110336122B (en) * | 2019-04-18 | 2021-07-23 | 中天宽带技术有限公司 | Patch antenna and electronic equipment |
| CN112751190A (en) * | 2020-12-24 | 2021-05-04 | 航天时代飞鸿技术有限公司 | Flexible antenna based on metamaterial structure and signal transmission device |
| CN112751190B (en) * | 2020-12-24 | 2023-01-20 | 航天时代飞鸿技术有限公司 | Flexible antenna based on metamaterial structure and signal transmission device |
| CN113764862A (en) * | 2021-09-03 | 2021-12-07 | 北京有竹居网络技术有限公司 | Antenna and wearable device |
| CN113764862B (en) * | 2021-09-03 | 2024-03-01 | 北京有竹居网络技术有限公司 | Antenna and wearable device |
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Application publication date: 20100623 |