CN203932311U - A kind of four trap UWB antennas based on EBG structure - Google Patents
A kind of four trap UWB antennas based on EBG structure Download PDFInfo
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- CN203932311U CN203932311U CN201320782086.9U CN201320782086U CN203932311U CN 203932311 U CN203932311 U CN 203932311U CN 201320782086 U CN201320782086 U CN 201320782086U CN 203932311 U CN203932311 U CN 203932311U
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- ebg
- shaped groove
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Abstract
The utility model relates to a kind of four trap UWB antennas based on EBG structure, it comprises part metals ground plate (10), medium substrate (20), aerial radiation paster (30), 50 ohm of feeder lines (31) and four L shaped groove EBG construction units (40,50,60,70).By four L shaped groove EBG construction units (40 that size is different, 50,60,70) be coupled with 50 ohm of feeder lines (31) of regular hexagon UWB antenna respectively, effectively filtering WIMAX(3.4GHz-3.7GHz), WLAN(5.15GHz-5.35GHz, 5.725-5.825GHz) and the descending satellite communication of X-band (7.25GHz-7.75GHz) signal of totally four frequency ranges.This antenna has good omnidirectional radiation characteristic and stable gain effect in full frequency band, is applicable to UWB wireless communication system.
Description
Technical field
The utility model relates to a kind of four trap antennas for ultra broadband (UWB) wireless communication field, especially a kind of four trap UWB antennas based on EBG structure.The L shaped groove of etching in bight via hole mushroom-shaped electromagnetic bandgap structure (CLV-EBG), and be coupled with the feeder line of regular hexagon ultra broadband (UWB) antenna, effectively filtering microwave interconnecting access (WIMAX, 3.4GHz-3.7GHz), the signal of wireless personal local area network (WLAN (5.15GHz-5.35GHz, 5.725GHz-5.825GHz)) and four frequency ranges of the descending satellite communication signal of X-band (7.25GHz-7.75GHz).
Background technology
In February, 2002 FCC (Federal Communications Commission:FCC) divides 3.1GHz～10.6GHz frequency range into commercial UWB radio communication service and uses, henceforth, super-broadband tech has obtained fast development, the research of UWB antenna as one of key technology of UWB radio communication, has become the focus of research with design.Because the working frequency range of UWB system and some frequency range of existing wireless communications system overlap, 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)), the descending satellite communication signal of X-band (7.25GHz-7.75GHz) etc.In order to reduce UWB antenna, system communication in these frequency ranges is caused to interference, there is the UWB antenna of trap characteristic by extensive concern.
When realizing good trap characteristic, guarantee the miniaturization of UWB antenna, broadband, good radiation characteristic is a more thorny difficult problem.The existing a large amount of achievement in research of UWB antenna so far with trap characteristic, the technology that realizes trap may be summarized to be following several:
(1) at radiation patch or the ground plate etching line of rabbet joint
(2) add parasitic element
(3) load the band stop filter of SIR
These technology that realize trap exist following deficiency: on aerial radiation paster, cutting and near increase parasitic element radiation patch method all can change the CURRENT DISTRIBUTION on aerial radiation paster surface, affect the antenna pattern of antenna; Method in the cutting of antenna floor can make portion of energy leak from floor trough, and the back lobe of antenna pattern is exerted an influence, and reduces the gain of antenna; Adding parasitic element can increase the size of antenna, and loads the band stop filter of SIR, makes complex structure, and integrated difficulty is high.The ubiquitous problem of these methods is in addition, and each trap frequency band influences each other, and is difficult for independent control.
Electro-magnetic bandgap (EBG) structure is with its excellent frequency band gap characteristic, simple in structure, be easy to integrated, band gap properties is easy to regulate, if in addition miniaturization, by being coupled with input, can facilitate and realize independently and control each trap of ultra-wideband antenna, and less on the CURRENT DISTRIBUTION impact of radiation patch, can keep good radiation characteristic, gain effect.Therefore, design a high-performance ultra-wideband antenna that there is trap characteristic based on EBG structure and there is profound significance.
Utility model content
The purpose of this utility model is to improve affects antenna radiation characteristics in existing UWB antenna notch technology, increase antenna size, trap is difficult for the defects such as independent control.By four different L shaped groove EBG structures of size being loaded on respectively to the feeder line both sides of regular hexagon UWB antenna, form coupling, effectively filtering WIMAX (3.3GHz-3.6GHz), WLAN (5.15GHz-5.35GHz, 5.725GHz-5.825GHz) and the descending satellite communication signal of X-band (5.25GHz-5.75GHz) signal of totally four frequency ranges, realized good narrow resistance band characteristic, and four trap band characteristic can independent regulation.
The technical scheme that the utility model adopts is:
A kind of four trap UWB antennas based on EBG structure, it is characterized in that: comprise part metals ground plate (10), medium substrate (20), aerial radiation paster (30), 50 ohm of feeder lines (31), L shaped groove EBG unit one (40), L shaped groove EBG unit two (50), L shaped groove EBG unit three (60) and L shaped groove EBG unit four (70), aerial radiation paster (30) and 50 ohm of feeder lines (31) are positioned at the upper surface of medium substrate (20), part metals ground plate (10) is positioned at the lower surface of medium substrate (20), L shaped groove EBG unit one (40) and L shaped groove EBG unit three (60) load on 50 ohm of feeder lines (31) left side, and L shaped groove EBG unit two (50) and L shaped groove EBG unit four (70) load on 50 ohm of feeder lines (31) right side.
Described a kind of four trap UWB antennas based on EBG structure, it is characterized in that: part metals ground plate (10) upper topside mid portion etching with the wide rectangular channel (11) of 50 ohm of feeder lines (31), aerial radiation paster (30) is regular hexagon.
Described a kind of four trap UWB antennas based on EBG structure, is characterized in that: L shaped groove EBG unit one (40), L shaped groove EBG unit two (50), L shaped groove EBG unit three (60) and L shaped groove EBG unit four (70) comprise EBG metal patch, L shaped groove and round metal cylindricality via hole.
Described a kind of four trap UWB antennas based on EBG structure, it is characterized in that: round metal cylindricality via hole one (41), round metal cylindricality via hole two (51), round metal cylindricality via hole three (61) and round metal cylindricality via hole four (71) are through between EBG metal patch, medium substrate (20) and partial earthing plate (10), round metal cylindricality via hole one (41) and round metal column type via hole three (61) are positioned at the upper left corner of EBG metal patch, and round metal cylindricality via hole two (51) and round metal column type via hole four (71) are positioned at the upper right corner of EBG metal patch.
The utility model has following advantage and characteristic with respect to prior art:
(1) the L shaped groove of etching in CLV-EBG structure, has extended equivalent current path, has reduced the size of CLV-EBG unit, has guaranteed the miniaturization of UWB antenna, and simple in structure, be easy to integrated.
(2) the L shaped groove of etching in CLV-EBG structure, narrows down bandwidth of rejection, independently filtering the signal of two frequency ranges of WLAN, improved the availability of frequency spectrum.
(3) relative bandwidth of antenna is wider, and the low-limit frequency that is greater than 134.9%, VSWR<2 is 2.33GHz, and highest frequency is greater than 12GHz.
(4) load L shaped groove EBG structure, less on the radiation patch surface current impact of antenna, thus kept omnidirectional radiation characteristic that UWB antenna full frequency band is good and stable gain effect.
(5) four trap band characteristic of the descending satellite communication signal of WIMAX (3.3GHz-3.6GHz), WLAN (5.15GHz-5.35GHz, 5.725GHz-5.825GHz) and X wave band (5.25GHz-5.75GHz) (bandwidth, position etc.) can be by regulating four L shaped groove EBG construction unit parameters to control independently.
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;
Fig. 4 is antenna standing wave ratio parameter schematic diagram;
Fig. 5 is antenna peak gain schematic diagram;
Fig. 6 is the E face directional diagram of antenna under 4GHz;
Fig. 7 is the H face directional diagram of antenna under 4GHz;
Embodiment
Below in conjunction with accompanying drawing, the utility model will be further described.
As shown in Figure 1 and Figure 2, a kind of four trap UWB antennas based on EBG structure, comprise part metals ground plate (10), medium substrate (20), aerial radiation paster (30), 50 ohm of feeder lines (31) and four L shaped groove EBG unit (40 that size is different, 50,60,70).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 used for regulating the impedance matching of UWB antenna high band.In part metals ground plate (10) upper topside mid portion center etching one wide be W
s, long is L
srectangular channel (11), its width equates with 50 ohm of feeder lines (31), this rectangular channel is used for improving antenna broadband character, improves standing-wave ratio bandwidth.
In antenna of the present utility model, the relative dielectric constant of medium substrate (20) is 3, and loss angle tangent is 0.004, is highly h, and processing cost is low, is easy to common printed circuit board integrated.
Aerial radiation paster (50) is that the length of side is the regular hexagon of W, and its upper topside overlaps with medium substrate (20) upper topside, and bottom and 50 ohm of feeder lines (31) join, and feeder line width is W
f.
Four L shaped groove EBG unit (40,50,60 that size is different, 70) be square, load on respectively 50 ohm of feeder lines (31) both sides and form coupling, four L shaped groove EBG unit (40,50,60,70) be respectively g with the distance of 50 ohm of feeder lines (31)
1, g
2, g
3, g
4, comprise EBG metal patch, L shaped groove (42,52,62,72) and four round metal cylindricality via holes (41,51,61,71).In L shaped groove EBG unit (40,50,60) respectively etching three L shaped grooves, and in L shaped groove EBG unit (70) etching two L shaped grooves.
The adjacent both sides of EBG metal patch, two, the left side are at a distance of L
01, wherein the EBG metal patch of below and medium substrate (20) base are at a distance of L
03.The adjacent both sides of EBG metal patch, two, the right are at a distance of L
02, wherein the EBG metal patch of below and medium substrate (20) base are at a distance of L
04.Four EBG metal patch length of sides are respectively a
1, a
2, a
3, a
4, do not increase the size of antenna, the miniaturization that has kept antenna.L shaped groove (42,52,62,72) is wide is all 0.2mm, and distance is also 0.2mm each other, and is arranged in helical form, when extending equivalent current path, has reduced bandwidth of rejection, has realized the comprehensive Design of miniaturization 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 (51,71) is positioned at the upper right corner of EBG metal patch, and four round metal cylindricality via holes (41,51,61,71) radius is respectively r
1, r
2, r
3, r
4, its edge and EBG metal patch edge are all 0.2mm apart.
As shown in Figure 3, the trap principle of L shaped groove EBG structure is described here from the front view of this UWB antenna, wherein medium substrate is perspective structure.Take L shaped groove EBG unit (40) describes as example, when by 50 ohm of feeder lines (31) during to antenna feed, and EBG structural metal paster and 50 ohm of feeder lines (31) formation coupling capacitance C
10, by medium substrate (20), form coupling capacitance C with part metals ground plate (10)
11, by the current circuit of round metal cylindricality via hole (41), be equivalent to inductance L
10thereby, formed a LC resonant tank in parallel, resonance frequency
in like manner L shaped groove EBG unit (50,60,70) also can form other three LC resonant tanks in parallel, and resonance frequency is respectively
With
Four resonant tanks have played the effect of a prefilter, have effectively realized four traps.The centre frequency of four trap frequency ranges, notch bandwidth, the parameters such as notch depth can pass through to regulate the structural parameters of L shaped groove EBG unit (40,50,60,70): EBG metal patch length of side a
1, a
2, a
3, a
4with coupling distance g
1, g
2, g
3, g
4deng independently regulating.The utility model is exactly by the L shaped groove EBG of appropriate design unit (40,50,60,70) structural parameters, when guaranteeing antenna miniaturization, broadband, good radiation characteristic effectively filtering the signal of four frequency ranges of the descending satellite communication signal of WIMAX (3.3GHz-3.6GHz), WLAN (5.15GHz-5.35GHz, 5.725GHz-5.825GHz) and X-band (5.25GHz-5.75GHz).Wherein L shaped groove EBG unit (60) is used for the signal of filtering WIMAX frequency range, and L shaped groove EBG unit (40,50) is used for respectively the signal of two frequency bands of filtering WLAN, and L shaped groove EBG unit (70) is used for the descending satellite communication signal of filtering X-band.
As Fig. 1, Fig. 2, shown in Fig. 3, the concrete structure of this UWB antenna is of a size of: W
0=34mm, L
0=43.9mm, W=10.8mm, L
1=25.2mm, a
1=3.65mm, a
2=3.3mm, a
3=5.45mm, a
4=2.48mm, 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, r
4=0.3mm, g
1=0.5mm, g
2=0.75mm, g
3=0.387mm, g
4=0.624mm, L
01=5.45mm, L
02=7.11mm, L
03=4.275mm, L
04=5.76mm.
As shown in Figure 4, the antenna standing wave ratio bandwidth of VSWR<2 has covered the frequency band range of UWB, and low frequency is 2.33GHz, and high frequency is greater than 12GHz, and relative bandwidth is greater than 134.9%.At 3.5GHz, 5.2GHz, 5.8GHz and 7.5GHz place have produced four traps, maximum notch depth can reach 6.28dB respectively, 5.05dB, 5.47dB and 4.64dB, notch-width (VSWR>2) is respectively 3.38GHz-3.71GHz, 5.02GHz-5.39GHz, 5.61GHz-5.99GHz and 7.12GHz-7.86GHz, there is good narrow resistance band characteristic, when guaranteeing band efficiency, effectively filtering WIMAX (3.3GHz-3.6GHz), WLAN (5.15GHz-5.35GHz, 5.725GHz-5.825GHz) and the signal of four frequency ranges of the descending satellite communication signal of X-band (5.25GHz-5.75GHz).
As shown in Figure 5, from dotted portion, can find out that while not loading four L shaped groove EBG unit (40,50,60,70), UWB antenna is in 3.1GHz-10.6GHz frequency band range, peak gain minimum value is 2.27dB, and maximum is 5.4dB.Load four L shaped groove EBG unit (40,50,60,70) after, in 3.52GHz, 5.29GHz, 5.78GHz and tetra-trap frequency range place gains of 7.7GHz, obviously reduce, drop to respectively-3.41dB, 0.85dB, 0.08dB and 1.68dB, and peak gain maximum is 5.85dB, produced good trap effect.Two curves of other frequency ranges are consistent substantially, thereby show, the loading of four L shaped groove EBG unit (40,50,60,70) is except trap frequency range, very little to the gain effects of former UWB antenna, has guaranteed stable gain effect in full frequency band.
As Fig. 6, shown in Fig. 7, in the E of 4GHz place face and H surface radiation directional diagram, dotted portion and the basic coincidence of solid line part, having shown to load L shaped groove EBG structure does not have impact substantially on the radiation characteristic of former UWB antenna, and wherein H face is similar to omnidirectional radiation characteristic, and the radiation characteristic of E face is similar with the radiation characteristic of dipole, be approximately ' 8 ' shape, the omnidirectional radiation characteristic that this antenna is good is applicable to the Technology of Ultra field.
Claims (4)
1. four trap UWB antennas based on EBG structure, it is characterized in that: comprise part metals ground plate (10), medium substrate (20), aerial radiation paster (30), 50 ohm of feeder lines (31), L shaped groove EBG unit one (40), L shaped groove EBG unit two (50), L shaped groove EBG unit three (60) and L shaped groove EBG unit four (70), aerial radiation paster (30) and 50 ohm of feeder lines (31) are positioned at the upper surface of medium substrate (20), part metals ground plate (10) is positioned at the lower surface of medium substrate (20), L shaped groove EBG unit one (40) and L shaped groove EBG unit three (60) load on 50 ohm of feeder lines (31) left side, and L shaped groove EBG unit two (50) and L shaped groove EBG unit four (70) load on 50 ohm of feeder lines (31) right side.
2. a kind of four trap UWB antennas based on EBG structure according to claim 1, it is characterized in that: part metals ground plate (10) upper topside mid portion etching with the wide rectangular channel (11) of 50 ohm of feeder lines (31), aerial radiation paster (30) is regular hexagon.
3. a kind of four trap UWB antennas based on EBG structure according to claim 1, is characterized in that: L shaped groove EBG unit one (40), L shaped groove EBG unit two (50), L shaped groove EBG unit three (60) and L shaped groove EBG unit four (70) comprise EBG metal patch, L shaped groove and round metal cylindricality via hole.
4. a kind of four trap UWB antennas based on EBG structure according to claim 1, it is characterized in that: round metal cylindricality via hole one (41), round metal cylindricality via hole two (51), round metal cylindricality via hole three (61) and round metal cylindricality via hole four (71) are through between EBG metal patch, medium substrate (20) and partial earthing plate (10), round metal cylindricality via hole one (41) and round metal column type via hole three (61) are positioned at the upper left corner of EBG metal patch, and round metal cylindricality via hole two (51) and round metal column type via hole four (71) are positioned at the upper right corner of EBG metal patch.
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Cited By (1)
| 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 |
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Cited By (1)
| 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 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141105 Termination date: 20151127 |