CN104681964A - Novel tri-wave trapping UWB (Ultra Wide Band) antenna - Google Patents
Novel tri-wave trapping UWB (Ultra Wide Band) antenna Download PDFInfo
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- CN104681964A CN104681964A CN201310637144.3A CN201310637144A CN104681964A CN 104681964 A CN104681964 A CN 104681964A CN 201310637144 A CN201310637144 A CN 201310637144A CN 104681964 A CN104681964 A CN 104681964A
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Abstract
The invention relates to a novel tri-wave trapping UWB (Ultra Wide Band) antenna which comprises a partial metal earth plate (10), a dielectric substrate (20), an antenna radiation patch (30), a 50-ohm feeder line (31) and three L-shaped groove EBG (Electromagnetic Band Gap) structural units (40,50,60). The three L-shaped groove EBG structural units (40,50,60) which are different in size are respectively coupled with the 50-ohm feeder line (31) of a round monopole UWB antenna, so that signals of three frequency bands, namely WIMAX (World Interoperability for Microwave Access) (3.3GHz-3.6GHz) and WLAN (Wireless Local Area Network) (5.15GHz-5.35GHz, 5.725-5.825GHz), are effectively filtered out while the miniaturization, wide band and favorable radiation characteristic of the antenna are ensured. The antenna has a favorable omnidirectional radiation characteristic in a whole frequency band, and is stable in gain effect, favorable in wave trapping characteristic and applicable to the field of UWB wireless communication.
Description
Technical field
The present invention relates to a kind of antenna, particularly a kind of three novel trap UWB antennas.
Background technology
In February, 2002 FCC (Federal Communications Commission:FCC) 3.1GHz ~ 10.6GHz frequency range is divided into commercial UWB radio communication service to use, henceforth, super-broadband tech obtains fast development, the research & design of UWB antenna, as one of the key technology of UWB radio communication, has become the focus of research.Because the working frequency range of UWB system overlaps with some frequency range of existing wireless communications system, as worldwide interoperability for microwave access (WIMAX, 3.3GHz-3.6GHz), wireless personal local area network (WLAN, (5.15GHz-5.35GHz, 5.725GHz-5.825GHz)) etc.In order to reduce UWB antenna, interference being caused to system communication in these frequency ranges, there is the UWB antenna of trap characteristic by extensive concern.
While realizing good trap characteristic, ensure the miniaturization of UWB antenna, broadband, good radiation characteristic is a more thorny difficult problem.The UWB antenna so far with trap characteristic has a large amount of achievements in research, and the technology realizing trap may be summarized to be following several:
(1) at radiation patch or the ground plate etching line of rabbet joint
(2) parasitic element is added
(3) band stop filter of SIR is loaded
These technology realizing trap also exist following deficiency: on aerial radiation paster, cutting and the method that increases parasitic element near radiation patch all can change the CURRENT DISTRIBUTION of aerial radiation chip surface, affect the antenna pattern of antenna; Portion of energy can be made to leak from floor trough in the method for antenna floor cutting, the back lobe of antenna pattern is had an impact, reduce the gain of antenna; Add the size that parasitic element can increase antenna, and load the band stop filter of SIR, make complex structure, integrated difficulty is high.The ubiquitous problem of these methods is that each notch band influences each other in addition, not easily independent control.
Electro-magnetic bandgap (EBG) structure is with the frequency band gap characteristic of its excellence, structure is simple, be easy to integrated, band gap properties is easy to regulate, if in addition miniaturized, by being coupled with input, can facilitate and realize and control each trap of ultra-wideband antenna independently, and less on the CURRENT DISTRIBUTION impact of radiation patch, good radiation characteristic can be kept, gain effect.Therefore, design a high-performance ultra-wideband antenna that there is trap characteristic based on EBG structure and there is profound significance.
Summary of the invention
The object of the invention is to improve in existing UWB antenna notch technology affects antenna radiation characteristics, increases the defects such as antenna size, trap not easily independently control.Feeder line both sides L shape groove EBG structures different for three sizes being loaded on respectively the sub-UWB antenna of circular-shaped monopole form coupling, filtering WIMAX(3.3GHz-3.6GHz effectively) and WLAN(5.15GHz-5.35GHz, 5.725GHz-5.825GHz) the signal of totally three frequency ranges, achieve good narrow resistance band characteristic, and three trap band characteristic can independent regulation.
The technical solution adopted in the present invention is:
Three novel trap UWB antennas, is characterized in that: comprise L shape groove EBG unit (40,50,60) that part metals ground plate (10), medium substrate (20), aerial radiation paster (30), 50 ohm of feeder lines (31) are different with three sizes.
Described three a kind of novel trap UWB antennas, is characterized in that: part metals ground plate (10) upper topside mid portion has etched the rectangular channel (11) wide with 50 ohm of feeder lines (31), and aerial radiation paster (30) is circular.
Described three a kind of novel trap UWB antennas, is characterized in that: L shape groove EBG unit (40,50,60) that three sizes are different loads on 50 ohm of feeder line (31) both sides respectively and forms coupling; L shape groove EBG unit (40,50,60) comprises EBG metal patch, L shape groove (42,52,62) and three round metal cylindricality via holes (41,51,61).
Described three a kind of novel trap UWB antennas, it is characterized in that: three round metal cylindricality via holes (41,51,61) through EBG metal patch, between medium substrate (20) and partial earthing plate (10), round metal cylindricality via hole (41,61) be positioned at the upper left corner of EBG metal patch, and round metal cylindricality via hole (51) is positioned at the upper right corner of EBG metal patch.
The present invention has following advantage and characteristic relative to prior art:
(1) in CLV-EBG structure, etch three L shape grooves, extend equivalent current path, reduce the size of CLV-EBG unit, ensure that the miniaturization of UWB antenna, and structure simple, be easy to integrated.
(2) in CLV-EBG structure, etch three L shape grooves, bandwidth of rejection is narrowed, the filtering signal of WLAN two frequency ranges, improves the availability of frequency spectrum independently.
(3) relative bandwidth of antenna is wider, and the low-limit frequency being greater than 133%, VSWR<2 is 2.4GHz, and highest frequency is greater than 12GHz.
(4) L shape groove EBG structure is loaded, less on the radiation patch surface current impact of antenna, thus maintain the good omnidirectional radiation characteristic of UWB antenna full frequency band and stable gain effect.
(5) WIMAX(3.3GHz-3.6GHz) and WLAN(5.15GHz-5.35GHz, 5.725GHz-5.825GHz) three trap band characteristic (bandwidth, position etc.) can be controlled independently by adjustment three L shape groove EBG construction unit parameters.
Accompanying drawing explanation
Fig. 1 is antenna base structure vertical view;
Fig. 2 is antenna back side basic block diagram;
Fig. 3 is EBG trap schematic diagram;
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in Figure 1 and Figure 2, a kind of three novel trap UWB antennas, comprise L shape groove EBG unit (40,50,60) that part metals ground plate (10), medium substrate (20), aerial radiation paster (30), 50 ohm of feeder lines (31) are different with three sizes.Wherein partial earthing plate (10) is positioned at medium substrate (20) bottom surface, and has certain distance (L between upper topside and aerial radiation paster (30)
1-Lg), this distance is for regulating the impedance matching of UWB antenna high band.Etched at part metals ground plate (10) upper topside mid portion center one wide for W
s, long is L
srectangular channel (11), its width is equal with 50 ohm of feeder lines (31), and this rectangular channel, for improving antenna broadband character, improves standing-wave ratio bandwidth.
In antenna of the present invention, the relative dielectric constant of medium substrate (20) is 3, and loss angle tangent is 0.004, and be highly h, processing cost is low, is easy to integrated with common printed circuit board.
Aerial radiation paster (50) is circular, and its upper topside overlaps with medium substrate (20) upper topside, and bottom connects with 50 ohm of feeder lines (31), and feeder line width is W
f.
L shape groove EBG unit (40,50,60) that three sizes are different is square, loads on 50 ohm of feeder line (31) both sides respectively and forms coupling, and three L shape groove EBG unit (40,50,60) are respectively g with the distance of 50 ohm of feeder lines (31)
1, g
2, g
3, comprise EBG metal patch, L shape groove (42,52,62) and three round metal cylindricality via holes (41,51,61).
The adjacent both sides of EBG metal patch, two, the left side are at a distance of L
01, the EBG metal patch wherein and medium substrate (20) base are at a distance of L
03, the right EBG metal patch and medium substrate (20) base are at a distance of L
02.Three EBG metal patch length of sides are respectively a
1, a
2, a
3, do not increase the size of antenna, maintain the miniaturization of antenna.L shape groove (42,52,62) is wide is all 0.2mm, and distance is also 0.2mm each other, and is arranged in helical form, reduces bandwidth of rejection while extending equivalent current path, achieves comprehensive Design that is miniaturized and narrow resistance band.Round metal cylindricality via hole (41,61) is positioned at the upper left corner of EBG metal patch, and round metal cylindricality via hole (51) is positioned at the upper right corner of EBG metal patch, and three round metal cylindricality via hole (41,51,61) radiuses are respectively r
1, r
2, r
3, its edge and EBG metal patch edge are 0.2mm all apart.
As shown in Figure 3, the trap principle of L shape groove EBG structure is described from the front view of this UWB antenna here, and wherein medium substrate is perspective structure.Be described for L shape groove EBG unit (50), when passing through 50 ohm of feeder lines (31) to antenna feed, EBG structural metal paster and 50 ohm of feeder lines (31) form coupling capacitance C
20, form coupling capacitance C with part metals ground plate (10) by medium substrate (20)
21, be equivalent to inductance L by the current circuit of round metal cylindricality via hole (41)
20, thus define a parallel LC resonance loop, resonance frequency
in like manner L shape groove EBG unit (40,60) also can form two other parallel LC resonance loop, and resonance frequency is respectively
with
three resonant tanks serve the effect of a prefilter, have effectively achieved three traps.The centre frequency of three trap frequency ranges, notch bandwidth, the parameters such as notch depth can pass through the structural parameters regulating L shape groove EBG unit (40,50,60): EBG metal patch length of side a
1, a
2, a
3with coupling distance g
1, g
2, g
3etc. independently regulating.The present invention is exactly by appropriate design L shape groove EBG unit (40,50,60) structural parameters, the filtering WIMAX(3.3GHz-3.6GHz effectively ensureing antenna miniaturization, broadband, while good radiation characteristic) and WLAN(5.15GHz-5.35GHz, 5.725GHz-5.825GHz) signal of three frequency ranges.Wherein L shape groove EBG unit (60) is used for the signal of filtering WIMAX frequency range, and L shape groove EBG unit (40,50) is used for the signal of filtering WLAN two frequency bands respectively.
As shown in Fig. 1, Fig. 2, Fig. 3, the primary structure of this UWB antenna is of a size of: W
0=34mm, L
0=42.9mm, L
1=25.2mm, a
1=3.6mm, a
2=3.34mm, a
3=5.95mm, W
f=3.6mm, Lg=24mm, W
s=3.6mm, L
s=2mm, h=1.6mm, r
1=0.31mm, r
2=0.27mm, r
3=0.3mm, g
1=0.5mm, g
2=0.75mm, g
3=0.387mm, L
01=5.225mm, L
02=15.33mm, L
03=4.025mm.
Ultra-wideband antenna of the present invention, it is characterized in that etching three L shape grooves in bight via hole mushroom-shaped electromagnetic bandgap structure (CLV-EBG), and be coupled with the feeder line of the sub-ultra broadband of circular-shaped monopole (UWB) antenna, at guarantee antenna miniaturization, broadband, while good radiation characteristic, filtering microwave interconnecting access (WIMAX effectively, 3.3GHz-3.6GHz) with wireless personal local area network (WLAN(5.15GHz-5.35GHz, the 5.725GHz-5.825GHz)) signal of three frequency ranges, achieve good narrow resistance band characteristic, and three trap band characteristic can independent regulation, be applicable to technical field of ultra-wideband radio communication.
Claims (4)
1. novel three trap UWB antennas, it is characterized in that: comprise the L shape groove EBG unit (40 that part metals ground plate (10), medium substrate (20), aerial radiation paster (30), 50 ohm of feeder lines (31) are different with three sizes, 50,60).
2. a kind of three novel trap UWB antennas according to claim 1, it is characterized in that: part metals ground plate (10) upper topside mid portion has etched the rectangular channel (11) wide with 50 ohm of feeder lines (31), aerial radiation paster (30) is circular.
3. a kind of three novel trap UWB antennas according to claim 1, is characterized in that: L shape groove EBG unit (40,50,60) that three sizes are different loads on 50 ohm of feeder line (31) both sides respectively and forms coupling; L shape groove EBG unit (40,50,60) comprises EBG metal patch, L shape groove (42,52,62) and three round metal cylindricality via holes (41,51,61).
4. a kind of three trap UWB antennas based on L shape groove EBG structure according to claim 1, it is characterized in that: a kind of three novel trap UWB antennas, it is characterized in that, three round metal cylindricality via holes (41,51,61) through EBG metal patch, between medium substrate (20) and partial earthing plate (10), round metal cylindricality via hole (41,61) be positioned at the upper left corner of EBG metal patch, and round metal cylindricality via hole (51) is positioned at the upper right corner of EBG metal patch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310637144.3A CN104681964A (en) | 2013-12-02 | 2013-12-02 | Novel tri-wave trapping UWB (Ultra Wide Band) antenna |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310637144.3A CN104681964A (en) | 2013-12-02 | 2013-12-02 | Novel tri-wave trapping UWB (Ultra Wide Band) antenna |
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| CN104681964A true CN104681964A (en) | 2015-06-03 |
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ID=53316728
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|---|---|---|---|
| CN201310637144.3A Pending CN104681964A (en) | 2013-12-02 | 2013-12-02 | Novel tri-wave trapping UWB (Ultra Wide Band) antenna |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109004355A (en) * | 2018-08-07 | 2018-12-14 | 中国计量大学 | A kind of dual-band antenna rake |
| CN109193164A (en) * | 2018-07-09 | 2019-01-11 | 哈尔滨工程大学 | The four frequency trap UWB antennas based on double-frequency resonance EBG structure |
-
2013
- 2013-12-02 CN CN201310637144.3A patent/CN104681964A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109193164A (en) * | 2018-07-09 | 2019-01-11 | 哈尔滨工程大学 | The four frequency trap UWB antennas based on double-frequency resonance EBG structure |
| CN109004355A (en) * | 2018-08-07 | 2018-12-14 | 中国计量大学 | A kind of dual-band antenna rake |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150603 |