CN103943953A - Small L-T branch knot double-belt-resistance plane ultra-wide-band antenna - Google Patents
Small L-T branch knot double-belt-resistance plane ultra-wide-band antenna Download PDFInfo
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Abstract
The invention relates to a small L-T branch knot double-belt-resistance plane ultra-wide-band antenna, and belongs to the technical field of ultra-wide-band wireless communication. The ultra-wide-band antenna comprises a dielectric substrate, a feeder line, an earth plate and a metal radiating unit; the metal radiating unit comprises an analogously-symmetrical-trapezoid unit, T-shaped metal branch knots and L-shaped metal branch knots; the analogously-symmetrical-trapezoid unit is composed of ten rectangular metal sheets which are sequentially connected from top to bottom, the two ends of the long edges of the fifth rectangular metal sheet are connected with the L-shaped metal branch knots respectively, circular through holes are formed in the analogously-symmetrical-trapezoid unit, the T-shaped metal branch knots are arranged in the circular through holes, and the vertical ends of the T-shaped metal branch knots are connected with the ninth rectangular metal sheet. By means of the ultra-wide-band antenna, the relative standing-wave ratio bandwidth ranges from 1.6 Ghz to 14.8 Ghz, the obvious filtering effect is achieved between 3.3 Ghz and 3.7 Ghz and between the 5.0 Ghz and 5.9 Ghz, the mutual interference effect of different wireless communication systems is accordingly restrained, and full-band stable gains and full-band omni-directional radiation are achieved.
Description
Technical field
The present invention relates to a kind of small-sized L-T minor matters biobelt resistance plane ultra-wideband antenna, belong to the Technology of Ultra field.
Background technology
Ultra-wideband antenna refers to the antenna of the non-constant width of bandwidth, and the characteristic of antenna does not exceed the corresponding frequency range of given scope as input impedance, efficiency, lobe sensing, lobe width, minor level, direction coefficient, gain, polarization etc. in the scope of non-constant width.
In prior art, the frequency range that radio ultra wide band system covers is 3.1Ghz-10.6GHz, and in the use band limits of WiMax, WLAN communication system, there is 3.3Ghz-3.7Ghz and 5.0Ghz-5.9Ghz frequency range, and the system such as IEEE802.11b/g, RFID has proposed the user demand to 2.4-2.484GHz frequency range, this has just caused in the time that needs ultra broadband and IEEE802.11b/g, RFID dual system are used simultaneously, WiMax, WLAN communication system and the mutual interference of dual system phase.
Summary of the invention
The object of the invention is to solve in prior art when the system such as radio ultra wide band system and IEEE802.11b/g, RFID is used simultaneously, with the technical problem of WiMax, the mutual interference of WLAN communication system phase, provide a kind of small-sized L-T minor matters biobelt resistance plane ultra-wideband antenna.
Small-sized L-T minor matters biobelt resistance plane ultra-wideband antenna of the present invention, comprises medium substrate; Be set in described medium substrate upper surface and for receiving electromagnetic feed line; Be set in described medium substrate upper surface the metal radiation unit for radiated electromagnetic wave; Be fixed on described medium substrate upper surface and the symmetrical ground plate that is set in feed line both sides; Described feed line and metal radiation unit are all with respect to the axis symmetry of medium substrate; Described metal radiation unit comprises the symmetrical trapezoidal element of class, T shape metal minor matters and L shaped metal minor matters;
The symmetrical trapezoidal element of described class is connected and rearranges successively from top to bottom by ten rectangle sheet metals, and from top to bottom, length is respectively 6mm, 12mm to described ten rectangle sheet metals, 17mm, 22mm, 24mm, 22mm, 17mm, 12mm, 9mm, 6mm, the wide 1.5mm that is respectively, 2mm, 2mm, 2mm, 2mm, 2mm, 2mm, 2mm, 2.5mm, 2mm; The two ends on the long limit of described the 5th rectangle sheet metal are connected with respectively L shaped metal minor matters, described L shaped metal minor matters are inverted L-shaped sheet metal, the horizontal end of L shaped metal minor matters equates with the perpendicular end length of side, the horizontal end length of side is 7mm, the horizontal end of L shaped metal minor matters is 0.5mm with the width of perpendicular end, the end of the perpendicular end of L shaped metal minor matters is connected with the long limit of the 5th rectangle sheet metal, and the outer side edges of the perpendicular end of L shaped metal minor matters is alignd with the broadside of the 5th rectangle sheet metal; In the symmetrical trapezoidal element of described class, be provided with manhole, the distance of center circle of manhole is 3mm from the vertical range on the upper base of the 9th rectangle sheet metal, and the radius of manhole is 4.5mm; In described manhole, be provided with T shape metal minor matters, T shape metal minor matters are T shape sheet metal, the long 6mm of horizontal end of T shape metal minor matters, the long 2mm of perpendicular end, the horizontal end of T shape metal minor matters is 0.5mm with the width of perpendicular end, and the end of the perpendicular end of T shape metal minor matters is connected with the 9th rectangle sheet metal; Described feed line is rectangle sheet metal, described ground plate is two rectangle sheet metals, one article of broadside of feed line is connected with the long limit of the tenth rectangle sheet metal, the broadside of another of feed line broadside and ground plate is on same straight line, the long limit of ground plate is parallel with the long limit of feed line, and ground plate is being provided with right angle opening near feed line and junction, metal radiation unit.
Further, the long limit of described feed line is 11.5mm, and broadside is 2.8mm.
Further, described ground plate is that two long limits are 11.5mm, and broadside is the rectangle sheet metal of 11.2mm.
Further, the length of two right angle openings of described ground plate is 2.2mm, the wide 1.5mm that is, and the long limit of two right angle openings is parallel with the broadside of ground plate.
Further, described sheet metal is copper sheet.
Operation principle of the present invention: the designed antenna of the present invention is small-sized plane ultra-wideband microstrip antenna, antenna adopts coplanar waveguide structure to carry out feed, electromagnetic wave is along propagated forward between metal feed line and symmetrical structure metal ground plate, owing to adopting the symmetrical stairstepping metal radiation of class unit, be equivalent to micro-band metal patch of different length-width ratios to be connected in series together, the resonance frequency corresponding to metal patch of different length-width ratios, interconnect by different resonant frequency points, realize effective expansion of antenna standing wave ratio bandwidth, therefore can produce resonance effect to the electromagnetic wave of different frequency range, thereby realize effective broadening of microstrip antenna standing-wave ratio bandwidth, in the time that near electromagnetic wave 5.6GHz frequency passes through the inner T shape of metal radiation body metal minor matters, be suppressed in around T shape metal minor matters, make antenna present standing wave state at the resonance structure of this frequency range, change the surface current of antenna, thereby it is electromagnetic to external radiation effectively to have suppressed corresponding frequency band, realize antenna to these two electromagnetic filter actions of frequency range, same principle, when near electromagnetic wave 3.6GHz frequency is during by symmetrical L shaped metal minor matters, also be bound in two L shaped metal minor matters, cannot produce radiation effect effectively, thereby realize the electromagnetic band resistance of this frequency range effect.
Beneficial effect of the present invention:
(1) the present invention is adopting coplanar waveguide structure feed, when having realized the miniaturization of antenna and complanation, metal radiation Unit Design has been become to the symmetrical ladder-type structure of class, effectively broadening antenna standing wave ratio bandwidth, realized the relative standing-wave ratio bandwidth of 1.6GHz-14.8Ghz;
(2) the present invention is ensureing under the prerequisite that microstrip antenna standing-wave ratio bandwidth is not reduced, adopt T shape and symmetrical L shaped metal minor matters in circle, effectively realize the trap function on antenna structure at 3.3GHz-3.7GHz and two frequency ranges of 5.0GHz-5.9Ghz, make antenna there is filter action significantly to the electromagnetic wave of these two frequency ranges, thereby suppressed the effect of disturbing mutually of different wireless communication system;
(3) ultra-wideband antenna of the present invention can obtain full frequency band constant gain and full frequency band omnidirectional radiation.
Brief description of the drawings
Fig. 1 is the structural representation of the small-sized L-T minor matters of the present invention biobelt resistance plane ultra-wideband antenna;
Fig. 2 is the structural representation of the small-sized L-T minor matters of the present invention biobelt resistance plane ultra-wideband antenna;
Fig. 3 is the standing-wave ratio Parameter Map of the small-sized L-T minor matters of the present invention biobelt resistance plane ultra-wideband antenna;
Fig. 4 is that the small-sized L-T minor matters of the present invention biobelt resistance plane ultra-wideband antenna is in 4GHz gain pattern;
Fig. 5 is that the small-sized L-T minor matters of the present invention biobelt resistance plane ultra-wideband antenna is in 5GHz gain pattern;
Fig. 6 is that the small-sized L-T minor matters of the present invention biobelt resistance plane ultra-wideband antenna is in 8GHz gain pattern;
Fig. 7 is the peak gain figure of the small-sized L-T minor matters of the present invention biobelt resistance plane ultra-wideband antenna;
In figure, 1, medium substrate, 2, feed line, 3, ground plate, 4, metal radiation unit.
Embodiment
In order further to understand the present invention, below in conjunction with embodiment, the preferred embodiments of the invention are described, but should be appreciated that these are described is for further illustrating the features and advantages of the present invention instead of limiting to the claimed invention.
As illustrated in fig. 1 and 2, small-sized L-T minor matters biobelt resistance plane ultra-wideband antenna of the present invention, comprises medium substrate 1, feed line 2, ground plate 3 and metal radiation unit 4.Wherein, feed line 2, ground plate 3 and metal radiation unit 4 are set in the upper surface of medium substrate 1, and feed line 2 and metal radiation unit 4 be all with respect to the axis symmetry of medium substrate 1, and ground plate 3 is symmetricly set on the both sides of feed line 2.Feed line 2 is for receiving electromagnetic wave, and ground plate 3 forms coplanar waveguide structure with feed line 2, makes electromagnetic wave along gap propagation between the two, plays the effect of forward direction guided electromagnetic wave, and metal radiation unit 4 is for radiated electromagnetic wave.Metal radiation unit 4 comprises the symmetrical trapezoidal element of class, T shape metal minor matters and L shaped metal minor matters, and the symmetrical trapezoidal element of class is connected and rearranges successively from top to bottom by ten rectangle sheet metals, and from top to bottom, length is respectively 6mm to ten rectangle sheet metals, 12mm, 17mm, 22mm, 24mm, 22mm, 17mm, 12mm, 9mm, 6mm, the wide 1.5mm that is respectively, 2mm, 2mm, 2mm, 2mm, 2mm, 2mm, 2mm, 2.5mm, 2mm; The two ends on the upper base of the 5th rectangle sheet metal are connected with respectively L shaped metal minor matters, L shaped metal minor matters are inverted L-shaped sheet metal, the horizontal end of L shaped metal minor matters equates with the perpendicular end length of side, the horizontal end length of side is 7mm, horizontal end and perpendicular end width are 0.5mm, the end of the perpendicular end of L shaped metal minor matters is connected with the upper base of the 5th rectangle sheet metal, and the outer side edges of the perpendicular end of L shaped metal minor matters is alignd with the broadside of the 5th rectangle sheet metal; The symmetrical trapezoidal element of class is provided with manhole, and the distance of center circle of manhole is 3mm from the vertical range on the 9th rectangular upper base, and the radius of manhole is 4.5mm; In manhole, be provided with T shape metal minor matters, T shape metal minor matters are T shape sheet metal, the long 6mm of horizontal end, and the long 2mm of perpendicular end, horizontal end and perpendicular end width are 0.5mm, and the end of the perpendicular end of T shape metal minor matters is connected with the 9th rectangle sheet metal; Feed line 2 is rectangle sheet metal, width is 2.8mm, length is 11.5mm, the both sides, long limit of feed line 2 arrange respectively ground plate 3, ground plate 3 is two rectangle sheet metals, long limit is 11.5mm, broadside is 11.2mm, the long limit of feed line 2 is parallel with the long limit of ground plate 3, the vertical interval on adjacent feed line 2 and the parallel long limit of ground plate 3 is 0.4mm, one article of broadside of feed line 2 is connected with the long limit of the tenth rectangle sheet metal of the symmetrical trapezoidal element of class, and another broadside of feed line 2 and the long limit of ground plate 3 are point-blank; Ground plate 3 is being provided with right angle opening near feed line 2 and 4 junctions, metal radiation unit, and the length of two right angle openings is 2.2mm, the wide 1.5mm that is, and the long limit of right angle opening is parallel with the broadside of ground plate 3.
In present embodiment, feed line 2, ten rectangle sheet metals, two L shaped metal minor matters and T shape metal minor matters integrated molding.
In present embodiment, medium substrate 1 is selected as FR-4, and dielectric constant is 4.4, and loss angle tangent is 0.01, and thickness is 1mm, antenna overall length 32mm, beam overall 26mm; Mentioned sheet metal is copper sheet.Present embodiment antenna adopts thermal transfer preparation: the copper layer on medium substrate 1 surface of testing dielectric constant is polished and cutd open light processing, the structural model of antenna in printing, vernier caliper is determined antenna size, according to size cutting medium substrate 1, the antenna producing is put into corrosive liquid, through side-to-side vibrations in 5 minutes corrosion, copper layer unnecessary antenna surface is gone, complete the preparation of small-sized plane ultra-wideband antenna.
Performance to the antenna preparing detects, and test result is as shown in Fig. 3-7.
Fig. 3 is the standing-wave ratio Parameter Map of antenna, in the time that standing-wave ratio parameter is less than 2, illustrate that antenna standing wave amount is little, there is good radiation characteristic, and standing-wave ratio is greater than at 2 o'clock, illustrate through the electromagnetic wave of aerial radiation and cannot effectively produce outside radiation characteristic, therefore as can be seen from Figure 3, antenna can cover the bandwidth range of rfid system and ultra-wideband communication system defined effectively, realizes the filtering characteristic of other communication systems to the applied 3.3Ghz-3.7Ghz such as WiMax, WLAN and two frequency ranges of 5.0Ghz-5.9Ghz simultaneously.
Fig. 4-6 are respectively the gain pattern of antenna at 4GHz, 6GHz and 8GHz, and as can be seen from the figure, the main pole directional diagram of the main frequency of antenna in the applied frequency band range of radio ultra wide band system, close to circle, illustrates that antenna has the characteristic of omnidirectional radiation.
Fig. 7 is the peak gain figure of antenna at 2GHz-11GHz, as can be seen from the figure, antenna has the constant gain of 2dB left and right in non-band resistance band limits, and in 3.3Ghz-3.7Ghz and two frequency ranges of 5.0Ghz-5.9Ghz, significantly declining appears in peak gain, illustrate that antenna is very low at these two band gains, can not play outside radiation effect, thereby realize the belt-resistance function to these two frequency band signals.
Obviously, the explanation of above embodiment is just for helping to understand method of the present invention and core concept thereof.It should be pointed out that the those of ordinary skill for described technical field, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection range of the claims in the present invention.
Claims (5)
1. small-sized L-T minor matters biobelt resistance plane ultra-wideband antenna, comprising:
Medium substrate (1);
Be set in described medium substrate (1) upper surface and for receiving electromagnetic feed line (2);
Be set in described medium substrate (1) upper surface the metal radiation unit (4) for radiated electromagnetic wave;
Be fixed on the ground plate (3) that described medium substrate (1) upper surface and symmetry are set in feed line (2) both sides;
It is characterized in that,
Described feed line (2) and metal radiation unit (4) are all with respect to the axis symmetry of medium substrate (1);
Described metal radiation unit (4) comprises the symmetrical trapezoidal element of class, T shape metal minor matters and L shaped metal minor matters;
The symmetrical trapezoidal element of described class is connected and rearranges successively from top to bottom by ten rectangle sheet metals, and from top to bottom, length is respectively 6mm, 12mm to described ten rectangle sheet metals, 17mm, 22mm, 24mm, 22mm, 17mm, 12mm, 9mm, 6mm, the wide 1.5mm that is respectively, 2mm, 2mm, 2mm, 2mm, 2mm, 2mm, 2mm, 2.5mm, 2mm;
The two ends on the long limit of described the 5th rectangle sheet metal are connected with respectively L shaped metal minor matters, described L shaped metal minor matters are inverted L-shaped sheet metal, the horizontal end of L shaped metal minor matters equates with the perpendicular end length of side, the horizontal end length of side is 7mm, the horizontal end of L shaped metal minor matters is 0.5mm with the width of perpendicular end, the end of the perpendicular end of L shaped metal minor matters is connected with the long limit of the 5th rectangle sheet metal, and the outer side edges of the perpendicular end of L shaped metal minor matters is alignd with the broadside of the 5th rectangle sheet metal;
In the symmetrical trapezoidal element of described class, be provided with manhole, the distance of center circle of manhole is 3mm from the vertical range on the upper base of the 9th rectangle sheet metal, and the radius of manhole is 4.5mm;
In described manhole, be provided with T shape metal minor matters, T shape metal minor matters are T shape sheet metal, the long 6mm of horizontal end of T shape metal minor matters, the long 2mm of perpendicular end, the horizontal end of T shape metal minor matters is 0.5mm with the width of perpendicular end, and the end of the perpendicular end of T shape metal minor matters is connected with the 9th rectangle sheet metal;
Described feed line (2) is rectangle sheet metal, described ground plate (3) is two rectangle sheet metals, one article of broadside of feed line (2) is connected with the long limit of the tenth rectangle sheet metal, the broadside of another broadside of feed line (2) and ground plate (3) is on same straight line, the long limit of ground plate (3) is parallel with the long limit of feed line (2), and ground plate (3) is being provided with right angle opening near feed line (2) and junction, metal radiation unit (4).
2. small-sized L-T minor matters biobelt resistance plane ultra-wideband antenna according to claim 1, is characterized in that, the long limit of described feed line (2) is 11.5mm, and broadside is 2.8mm.
3. small-sized L-T minor matters biobelt resistance plane ultra-wideband antenna according to claim 1, is characterized in that, described ground plate (3) is that two long limits are 11.5mm, and broadside is the rectangle sheet metal of 11.2mm.
4. small-sized L-T minor matters biobelt resistance plane ultra-wideband antenna according to claim 3, it is characterized in that, the length of two right angle openings of described ground plate (3) is 2.2mm, the wide 1.5mm that is, and the long limit of two right angle openings is parallel with the broadside of ground plate (3).
5. small-sized L-T minor matters biobelt resistance plane ultra-wideband antenna according to claim 1, is characterized in that, described sheet metal is copper sheet.
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| CN104993225A (en) * | 2015-06-23 | 2015-10-21 | 浙江工商大学 | Miniature G-type monopole antenna applied to WLAN |
| CN105071032A (en) * | 2015-08-25 | 2015-11-18 | 中国航空无线电电子研究所 | Miniaturization broadband microstrip antenna |
| CN105226379A (en) * | 2015-08-25 | 2016-01-06 | 中国航空无线电电子研究所 | A kind of miniaturization broadband micro-strip array antenna |
| CN106252852A (en) * | 2016-09-18 | 2016-12-21 | 北京石油化工学院 | Monopole ultra-wideband antenna |
| WO2017197975A1 (en) * | 2016-05-20 | 2017-11-23 | 中兴通讯股份有限公司 | Antenna and terminal device |
| CN108742643A (en) * | 2018-08-27 | 2018-11-06 | 天津大学 | A ultra-wideband antenna suitable for human blood glucose concentration detection |
| CN112216970A (en) * | 2020-09-25 | 2021-01-12 | 杭州泛利科技有限公司 | Miniaturized high-gain flexible unmanned aerial vehicle antenna |
| CN112332083A (en) * | 2020-10-16 | 2021-02-05 | 杭州电子科技大学 | Broadband omnidirectional trapped wave low-profile antenna |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104993225A (en) * | 2015-06-23 | 2015-10-21 | 浙江工商大学 | Miniature G-type monopole antenna applied to WLAN |
| CN104993225B (en) * | 2015-06-23 | 2017-10-20 | 浙江工商大学 | A kind of miniaturization G type monopole antennas applied to WLAN |
| CN105071032A (en) * | 2015-08-25 | 2015-11-18 | 中国航空无线电电子研究所 | Miniaturization broadband microstrip antenna |
| CN105226379A (en) * | 2015-08-25 | 2016-01-06 | 中国航空无线电电子研究所 | A kind of miniaturization broadband micro-strip array antenna |
| WO2017197975A1 (en) * | 2016-05-20 | 2017-11-23 | 中兴通讯股份有限公司 | Antenna and terminal device |
| CN106252852A (en) * | 2016-09-18 | 2016-12-21 | 北京石油化工学院 | Monopole ultra-wideband antenna |
| CN108742643A (en) * | 2018-08-27 | 2018-11-06 | 天津大学 | A ultra-wideband antenna suitable for human blood glucose concentration detection |
| CN108742643B (en) * | 2018-08-27 | 2023-10-17 | 天津大学 | Ultra-wideband antenna suitable for human blood sugar concentration detection |
| CN112216970A (en) * | 2020-09-25 | 2021-01-12 | 杭州泛利科技有限公司 | Miniaturized high-gain flexible unmanned aerial vehicle antenna |
| CN112216970B (en) * | 2020-09-25 | 2023-02-24 | 杭州泛利科技有限公司 | Miniaturized high-gain flexible unmanned aerial vehicle antenna |
| CN112332083A (en) * | 2020-10-16 | 2021-02-05 | 杭州电子科技大学 | Broadband omnidirectional trapped wave low-profile antenna |
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