CN203760635U - UWB antenna with band-stop characteristics based on CLV-EBG structure - Google Patents
UWB antenna with band-stop characteristics based on CLV-EBG structure Download PDFInfo
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- CN203760635U CN203760635U CN201320764028.3U CN201320764028U CN203760635U CN 203760635 U CN203760635 U CN 203760635U CN 201320764028 U CN201320764028 U CN 201320764028U CN 203760635 U CN203760635 U CN 203760635U
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- clv
- ebg
- antenna
- band
- uwb
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Abstract
The utility model discloses a UWB antenna with band-stop characteristics based on a CLV-EBG structure, comprising part of a metal grounding plate (10), a medium base plate (20), an antenna radiation patch (30), a 50ohm feeder line (31) and a CLV-EBG structure unit (40). The CLV-EBG structure unit (40) is coupled to the 50ohm feeder line (31) of the regular hexagon UWB antenna, which can effectively filter the signals of the wireless local area network (WLAN) frequency band while guaranteeing the miniaturization of the antenna, a wide frequency band and good radiation characteristics. The UWB antenna with band-stop characteristics based on CLV-EBG structure has the best omnidirectional radiation characteristics, gain effects and good trap wave characteristics in the full band, and is applicable to the UWB wireless communication system.
Description
Technical field
The utility model relates to a kind of antenna, particularly a kind of UWB antenna based on CLV-EBG structure with band resistance characteristic.Feeder line coupling by bight via hole mushroom-shaped electromagnetic bandgap structure (CLV-EBG) with regular hexagon ultra broadband (UWB) antenna, in ensureing antenna miniaturization, broadband, good radiation characteristic, effectively filtering the signal of wireless personal local area network (WLAN) frequency range, be applicable to UWB wireless communication system.
Background technology
In February, 2002 FCC (Federal Communications Commission:FCC) divides 3.1～10.6GHz 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-5.825GHz)) 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.
In realizing good trap characteristic, ensure 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) band stop filter of loading 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; Can make portion of energy leak from floor trough in the method for antenna floor cutting, the back lobe of antenna pattern is exerted an influence, reduce 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, the CLV-EBG structure of certain size parameter is loaded near the feeder line of regular hexagon UWB antenna, form coupling, effectively filtering the signal of WLAN frequency range, and trap band characteristic can be passed through CLV-EBG structure independent regulation.。
The technical scheme that the utility model adopts is:
A kind of UWB antenna based on CLV-EBG structure with band resistance characteristic, it is characterized in that: comprise part metals ground plate (10), medium substrate (20), aerial radiation paster (30), 50 ohm of feeder lines (31) and CLV-EBG unit (40), part metals ground plate (10) is positioned at the lower surface of medium substrate (20), aerial radiation paster (30) and 50 ohm of feeder lines (31) are positioned at the upper surface of medium substrate (20), CLV-EBG unit (40) loads on 50 ohm of feeder lines (31) left side, comprise medium substrate (20) upper surface EBG metal patch and round metal cylindricality via hole (41).
Described a kind of UWB antenna based on CLV-EBG structure with band resistance characteristic, 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 UWB antenna based on CLV-EBG structure with band resistance characteristic, it is characterized in that: it is characterized in that, CLV-EBG unit (40) is square, round metal cylindricality via hole (41) is through between EBG metal patch, medium substrate (20) and part metals ground plate (10), and is positioned at the upper left corner of EBG metal patch.
The utility model has following advantage and characteristic with respect to prior art:
(1) CLV-EBG is little than traditional mushroom-shaped electro-magnetic bandgap (CMT-EBG) physical dimension, has ensured the miniaturization of UWB antenna, and simple in structure, be easy to integrated.
(2) antenna relative bandwidth is wider, and the frequency band range that reaches 129%, VSWR<2 is 2.36GHz-10.79GHZ.
(3) load CLV-EBG structure, less on the radiation patch surface current impact of antenna, thus keep omnidirectional radiation characteristic that UWB antenna full frequency band is good and stable gain effect.
(4) WLAN trap band characteristic (bandwidth, position etc.) can be by regulating CLV-EBG construction unit parameter to control independently.
Brief description of the drawings
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, there is the UWB antenna of band resistance characteristic based on CLV-EBG structure, comprise part metals ground plate (10), medium substrate (20), aerial radiation paster (30), 50 ohm of feeder lines (31) and CLV-EBG unit (40).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) top margin, and bottom and 50 ohm of feeder lines (31) join, and feeder line width is W
f.
CLV-EBG unit (40) is square, loads on 50 ohm of feeder lines (31) left side adjacent locations and forms coupling, and CLV-EBG unit (40) are g with the distance of 50 ohm of feeder lines
1, comprise the EBG metal patch and the round metal cylindricality via hole (41) that load on medium substrate (20) upper surface.
EBG metal patch center and medium substrate (20) bottom is at a distance of Lg/2, and the length of side is a
1, do not increase the size of antenna, the miniaturization that has kept antenna.Round metal cylindricality via hole (41) is positioned at the upper left corner of EBG metal patch, and radius is r
1, its edge and EBG metal patch edge are at a distance of 0.2m.
As shown in Figure 3, the trap principle of CLV-EBG structure is described here from the front view of this UWB antenna, wherein medium substrate is perspective structure.In the time 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
10, form coupling capacitance C with part metals ground plate (10) by medium substrate (20)
11, be equivalent to inductance L by the current circuit of round metal cylindricality via hole (41)
10thereby, formed a LC resonant tank in parallel, resonance frequency
the effect that resonant tank has played a prefilter, has realized trap effectively.The centre frequency of trap frequency range, notch bandwidth, the parameters such as notch depth can pass through to regulate the structural parameters of CLV-EBG unit (40): EBG metal patch length of side a
1, coupling distance g
1deng independently regulating.The utility model is exactly by the structural parameters of appropriate design CLV-EBG unit (40), in ensureing antenna miniaturization, broadband, good radiation characteristic, effectively filtering the signal of WLAN (5.15-5.825GHz) frequency range.
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=4.68mm, W
f=3.6mm, Lg=24mm, W
s=3.6mm, L
s=2mm, h=1.6mm, r
1=0.3mm, g1=0.3mm.
As shown in Figure 4, antenna standing wave ratio bandwidth (VSWR<2), from 2.36GHz-10.79GHz, covered the frequency band range of UWB, and relative bandwidth has reached 129%.Produced a trap at 5.45GHz place, notch bandwidth (VSWR>2) is 5.10GHz-6.02GHz, and maximum notch depth can reach 5.11dB, ensureing in band efficiency, effectively filtering the signal of WLAN frequency range.
As shown in Figure 5, can find out that from dotted portion while not loading CLV-EBG unit (40), UWB antenna is in 3.1-10.6GHz frequency band range, peak gain minimum value is 2.27dB, and maximum is 5.4dB.Load after CLV-EBG unit (40), in 5.4GHz trap frequency range, place drops to 0.8dB, and peak gain maximum is 5.75dB, has produced good trap effect.Two curves of other frequency ranges are consistent substantially, thereby show, the loading of CLV-EBG unit (40) is except trap frequency range, very little to the gain effects of former UWB antenna, has ensured 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 solid line part overlap substantially, having shown to load CLV-EBG structure does not affect substantially on the radiation characteristic of former UWB antenna, the wherein approximate omnidirectional radiation characteristic of H face, 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 (3)
1. one kind has the UWB antenna of band resistance characteristic based on CLV-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) and CLV-EBG unit (40), part metals ground plate (10) is positioned at the lower surface of medium substrate (20), aerial radiation paster (30) and 50 ohm of feeder lines (31) are positioned at the upper surface of medium substrate (20), CLV-EBG unit (40) loads on 50 ohm of feeder lines (31) left side, comprise medium substrate (20) upper surface EBG metal patch and round metal cylindricality via hole (41).
2. a kind of UWB antenna based on CLV-EBG structure with band resistance characteristic 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 UWB antenna based on CLV-EBG structure with band resistance characteristic according to claim 1: it is characterized in that, CLV-EBG unit (40) is square, round metal cylindricality via hole (41) is through between EBG metal patch, medium substrate (20) and part metals ground plate (10), and is positioned at the upper left corner of EBG metal patch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320764028.3U CN203760635U (en) | 2013-11-27 | 2013-11-27 | UWB antenna with band-stop characteristics based on CLV-EBG structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320764028.3U CN203760635U (en) | 2013-11-27 | 2013-11-27 | UWB antenna with band-stop characteristics based on CLV-EBG structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203760635U true CN203760635U (en) | 2014-08-06 |
Family
ID=51255873
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320764028.3U Expired - Fee Related CN203760635U (en) | 2013-11-27 | 2013-11-27 | UWB antenna with band-stop characteristics based on CLV-EBG structure |
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| CN (1) | CN203760635U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113258279A (en) * | 2021-05-12 | 2021-08-13 | 福州大学 | 5G full-network-through miniaturized omnidirectional antenna based on metamaterial loading |
-
2013
- 2013-11-27 CN CN201320764028.3U patent/CN203760635U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113258279A (en) * | 2021-05-12 | 2021-08-13 | 福州大学 | 5G full-network-through miniaturized omnidirectional antenna based on metamaterial loading |
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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: 20140806 Termination date: 20151127 |