CN104659485B - A kind of anti-metal device and WIFI antennas - Google Patents

A kind of anti-metal device and WIFI antennas Download PDF

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Publication number
CN104659485B
CN104659485B CN201410043435.4A CN201410043435A CN104659485B CN 104659485 B CN104659485 B CN 104659485B CN 201410043435 A CN201410043435 A CN 201410043435A CN 104659485 B CN104659485 B CN 104659485B
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slot line
side
electro
flanging
line
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CN201410043435.4A
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CN104659485A (en
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曾文波
赵嘉
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广西科技大学
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Abstract

The invention discloses a kind of anti-metal device and include the WIFI antennas of the anti-metal device, it is related to radio art, the anti-metal device includes several periodic arrangements on two dimensional surface, seamless spliced electro-magnetic bandgap unit, the electro-magnetic bandgap unit is the plate that upper bottom surface is square, it is divided into upper dielectric layer and the metal level under, docked by side with the side of other electro-magnetic bandgap units realize it is seamless spliced, three slit regions according to setting shape and position distribution are distributed with the metal level, the anti-metal device can effectively reduce influence of the metal surface to antenna performance under WIFI frequency ranges, antenna is improved in the maximum gain for receiving direction;The WIFI built-in antennas have the anti-metal device, can effectively receive signal, and small volume, and processing installs simple, is adapted to the batch production of automobile accessories enterprise.

Description

A kind of anti-metal device and WIFI antennas

Technical field

The present invention relates to radio art, particularly WIFI field of antenna.

Background technology

WLAN(Wireless Local Area Networks, WLAN)It is that one kind utilizes radio frequency (Radio Frequency RF) technology carries out system according to transmission, and the technology can be such that the various network equipments wirelessly rapidly connect Enter Ethernet(INTERNET).At present, WLAN consensus standard mainly include work in 2.4 GHz 802.11b and 802.11g standards and the 802.11a standards for working in 5.8 GHz.

WIFI (Wireless Fidelity, Wireless Fidelity) technology is a nothing based on the series standards of IEEE 802.11 The gauze road communication technology, it is therefore an objective to improve the intercommunity between the Wi-Fi product based on the standards of IEEE 802.11, with WLAN Equally, WIFI groundwork frequency range has 2.4 GHz(802.11a)With 5.8 GHz(802.11b、g、n).WIFI is mainly used in By mobile terminal(Laptop computer, PDA, mobile phone, tablet personal computer etc.)Wirelessly interconnect.At present, WiFi technology has been It is deep among daily life, being wirelessly transferred based on WiFi technology, wireless networking are ubiquitous.

But under automotive environment, the need for existing technology does not adapt to WiFi technology.Movement with WIFI functions Equipment is in mobile in-car reception WIFI signal, less effective.Onboard configuration WIFI antennas can make mobile automobile realization pair Effective reception of the signals such as WIFI, in-car is forwarded to by WIFI signals, the WIFI terminal of in-car is more efficiently received WIFI signal.

Existing car antenna(Such as telescopic antenna, vehicle window printed antenna, roof " fish ridge " antenna), can only receives frequency Relatively low frequency modulation/amplitude modulation broadcast singal, it is impossible to the higher microwave signal of receives frequency(Such as WIFI signal).And it is existing WIFI antennas are directly configured onboard, are influenceed very big by metal car shell, it is difficult to effectively receive WIFI signal, and reason is in microwave Frequency range, automobile metal car shell is infinitely great good conductor, the characteristic of antenna for microwave antenna(Particularly impedance and radiation Characteristic, directionality)It is very big by metal ambient influnence, it is nearer from metal surface, influence bigger, WIFI is believed when being placed in car shell surface Number reception is bad, it is impossible to be directly used as car antenna particularly top antenna.

The content of the invention

It is an object of the invention to provide in a kind of anti-gold that antenna can be made effectively to receive WIFI signal in metal surface Category device and the WIFI antennas that WIFI signal is effectively received in metal surface.

To achieve the above object, the technical scheme is that:

The anti-metal device is included in periodic arrangement on two dimensional surface, seamless spliced multiple electro-magnetic bandgap units, The electro-magnetic bandgap unit is the square plate that the length of side is Lx, and thickness is h, be divided into above and below two layers, lower floor is dielectric layer, upper strata For metal level, docked by side with the side of other electro-magnetic bandgap units and realize seamless spliced, be distributed with the metal level Three slit regions:

First slit region includes four wide straight slot lines that head and the tail right angle is connected successively, and line width is Ws, and line length is 0.17Lx, the straight slot line is parallel and equal with four back gauges with the side of electro-magnetic bandgap unit bottom surface four respectively;

Second slit region includes four the first flanging U-shaped slot line units that head and the tail are connected successively, and described first turns up Side U-shaped slot line unit includes a base slot line, two isometric side slot lines and two isometric flanging slot lines, Two side slot lines are located at the same side of the base slot line, respectively by one end respectively with the base slot line Two ends are connected at a right angle, are formed a U-shaped structure, are passed through one end Cheng Zhi of the other end respectively with two flanging slot lines Angle is connected, and two flanging slot lines are located at the outside of the U-shaped structure;The base slot line, side slot line and Flanging slot line is wide, and width is Ws, and side gap line length is 0.09Lx, and the base slot line is a length of 0.17Lx, a length of 0.165Lx of flanging slot line;The U-shaped lug boss of each first flanging U-shaped slot line unit Point towards the electro-magnetic bandgap unit metal layer center, the base slot line respectively with the side of electro-magnetic bandgap unit bottom surface four It is parallel and equal with four back gauges;

3rd slit region includes four the second flanging U-shaped slot line units and eight right angle L-shaped slot line units, described Second flanging U-shaped slot line unit has the same shape and dimensions with the first flanging U-shaped slot line unit, described L-shaped slot line unit includes one long side slot line and a short side slot line, and long side seam gap line length is 0.25Lx, and width is 0.5Ws, a length of 0.15Lx of short side slot line, width is Ws, the long side seam gap line end of L-shaped slot line unit in right angle described in each two Point is connected, and tie point is located at four summits of electro-magnetic bandgap unit metal layer, the long side slot line outer side edges edge respectively Overlapped respectively with four side of electro-magnetic bandgap unit metal layer, the short side slot line is located in the electro-magnetic bandgap metal level Portion, two end points of four the second flanging U-shaped slot line units connect with the short side end points of two L-shaped slot lines respectively Connect, the U-shaped bossing of each flanging U-shaped slot line unit is towards the electro-magnetic bandgap unit bottom center;

The WIFI antennas include the anti-metal device, and the anti-metal device is combined with signal receiving device, use Polythene material or other high-frequency low-consumption Filled Dielectrics are simultaneously bonded into one, can also other modes be fixedly connected, formed one Individual antenna is overall.

Further, the parameter of the electro-magnetic bandgap unit is that Lx is 14~18 millimeters, and Ws is 0.4~1.8 millimeter, anti-gold The effect of category is more preferable.

The present invention can bring following technique effect:The anti-metal device, the magnetic conductor of its electromagnetic action ideal-like Surface, when the anti-metal device including the anti-metal device is placed between antenna and metal surface, can effectively drop Influence of the low metal surface to antenna performance, improves antenna in the maximum gain for receiving direction so that antenna roof or its Preferable electrical resistance is obtained on its metal surface;Electro-magnetic bandgap unit is more, and anti-metal device is bigger, the metallic area of covering Also bigger, the effect of its anti-metal is more obvious, takes up space certainly also bigger, by choosing suitable electromagnetic unit quantity And arrangement mode, suitable electromagnetic structure size can be obtained, the effect for effectively receiving WIFI signal can be reached, can be tried one's best again Take up space less;The present invention is also electro-magnetic bandgap mechanism built in antenna, and signal receiver combines, one antenna of formation It is overall, conveniently install, use, small volume is adapted to the batch production of automobile accessories enterprise.

Brief description of the drawings

Fig. 1 is the top view of anti-metal device;

Fig. 2 is the front view of anti-metal device;

Fig. 3 is electro-magnetic bandgap cell schematics;

Fig. 4 is the A-A sectional views of electro-magnetic bandgap unit;

Fig. 5 is WIFI antenna overall structure diagrams;

Fig. 6 is signal receiver structural representation;

Fig. 7 is the emulation impedance operator figure of embodiment 2;

Fig. 8 is emulation directional diagram of the embodiment 2 in 2.4G frequency ranges;

Fig. 9 is emulation directional diagram of the embodiment 2 in 5.8G frequency ranges;

Figure 10 is emulation directional diagram of the embodiment 3 in 2.4G frequency ranges;

Figure 11 is emulation directional diagram of the embodiment 3 in 5.8G frequency ranges;

Figure 12 is emulation directional diagram of the embodiment 4 in two frequency ranges of 2.4G;

Figure 13 is emulation directional diagram of the embodiment 4 in two frequency ranges of 5.8G.

Embodiment

Example is to the detailed description of the invention below in conjunction with the accompanying drawings.

Specific embodiment 1

The present embodiment is the specific embodiment of anti-metal device.

With reference to shown in accompanying drawing 1,2, this anti-metal device embodiment includes 64 and pressed for 8 × 8 matrix cycles on two dimensional surface Property arrangement, seamless spliced multiple electro-magnetic bandgap units 8, the electro-magnetic bandgap unit is the square plate that the length of side is 16 millimeters Block, uses thickness to be made up of 0.5 millimeter of RF4 single-clad boards, and point lower floor is relative dielectric constantε r =4.4, it is lost Angle tangent tans=0.02 dielectric layer 10, upper strata is metal level 9, is docked by side with the side of other electro-magnetic bandgap units Realize seamless spliced, three slit regions are distributed with the metal level:First slit region 11 includes four head and the tail right angle companies successively The wide straight slot line connect, line width is 0.4 millimeter, and line length is 2.72 millimeters, the straight slot line respectively with the electromagnetism The side of bandgap cell bottom surface four is parallel and equal with four back gauges;Second slit region 12 include four successively head and the tail connection first outside Flange U-shaped slot line unit, the first flanging U-shaped slot line unit includes base slot line, two isometric sides Side slot line and two isometric flanging slot lines, two side slot lines are located at the same side of the base slot line, Respectively the two ends by one end respectively with the base slot line are connected at a right angle, are formed a U-shaped structure, are distinguished by the other end It is connected at a right angle with one end of two flanging slot lines, two flanging slot lines are located at the U-shaped structure Outside;The base slot line, side slot line and flanging slot line are wide, and width is 0.4 millimeter, the side gap Line length is 1.44 millimeters, a length of 2.72 millimeters of the base slot line, a length of 2.64 millimeters of the flanging slot line;Each The U-shaped bossing of one flanging U-shaped slot line unit towards the electro-magnetic bandgap unit metal layer center, the base gap Line is parallel and equal with four back gauges with the side of electro-magnetic bandgap unit bottom surface four respectively;3rd slit region 13 includes four second Flanging U-shaped slot line unit and eight right angle L-shaped slot line units, the second flanging U-shaped slot line unit and first Flanging U-shaped slot line unit has the same shape and dimensions, and the right angle L-shaped slot line unit includes one long side seam gap Line and a short side slot line, long side seam gap line length are 4 millimeters, and width is 0.2 millimeter, and a length of 2.4 millimeters of short side slot line is wide Spend for 0.4 millimeter, the long side seam gap line endpoints of L-shaped slot line in right angle described in each two are connected, and tie point is located at the electricity respectively Four summits of tape gap unit metal layer, the long side slot line outer side edges along respectively with electro-magnetic bandgap unit metal layer Four sides are overlapped, and the short side slot line is located at the electro-magnetic bandgap metal layer itself, four the second flanging U-shaped slot lines Short side end points of two end points of unit respectively with two L-shaped slot lines is connected, each second flanging U-shaped slot line list The U-shaped bossing of member is towards the electro-magnetic bandgap unit bottom center.

Specific embodiment 2

The present embodiment is WIFI antenna embodiments.

With reference to shown in accompanying drawing 3,4, this WIFI antennas include the anti-metal dress that a signal receiver and one implement described in 1 Put, it is 128 millimeters that the signal receiver, which uses length and width, thickness is 0.5 millimeter, relative dielectric constantε r =4.4, loss angle Tangent tans=0.02 RF4 single-clad boards;Coplanar waveguide structure is made in the metal level of the single-clad board The circular-shaped monopole minor structure of feed, including a circular radiator, a coplanar waveguide structure and two metals, the circle Radiator radius be 18 millimeters, a length of 46 millimeters of the coplanar waveguide structure, a width of 5 millimeters, the metal length and width be 42 Millimeter, the spacing with the coplanar waveguide structure is 0.8 millimeter, and coaxial feeder is fed in distributing point 2, wherein coaxial inner conductor Couple distributing point, with connecting metal, signal receiver is put with anti-metal device by the corresponding mode of shape is parallel for outer conductor connection Put, the dielectric layer of signal receiver is adjacent with the metal level of anti-metal device and has space, distance is 6.6 millimeters, uses polyethylene Material is filled and is bonded into one.

With reference to shown in Fig. 5,6 and 7, the present embodiment has good impedance operator.The sub- plane WIFI antennas of conventional unipolar (TA) there is good impedance operator in free space, in 1.7-6.4 GHz frequency ranges, antenna return loss is less than-10 DB, this frequency range covers WIFI 2.4-2.485 ghz bands and 5.15-5.825 GH frequency ranges.But work as the antenna When being placed in metal surface, antenna impedance characteristic deteriorates, in above-mentioned WIFI frequency ranges, and antenna return loss is more than -10 dB, shows The antenna TA of conventional design can not be placed directly within metal surface(Roof)Use.And the present embodiment is in the above-mentioned WIFI frequencies referred to Section, return loss is less than -10 dB.

When the present embodiment is placed in metal surface, in two frequency ranges of WIFI, there is approximate isotropic directivity in horizontal plane, i.e., Curve B, is approximately one-way radiation on the vertical plane, i.e. curve A, as shown in Figure 6,7.

When following table show the present embodiment and is placed in metal surface, the gain simulation result on different frequency point can be seen Go out, the present embodiment has good gain effect.

Specific embodiment 3

The present embodiment is WIFI antenna embodiments.

The present embodiment and the difference of embodiment 1 are WSChoosing value is different, W in the present embodimentSIt is=0.4 millimeter, alternative to take d=6 Millimeter, remaining is identical.

When the present embodiment is placed in metal surface, in two frequency ranges of WIFI, also there is approximate isotropic directivity in horizontal plane, That is curve B, on the vertical plane also approximately at one-way radiation, i.e. curve A, as shown in Figure 8,9.

Specific embodiment 4

The present embodiment and the difference of embodiment 2 are WSChoosing value is different, W in the present embodimentSIt is=1.8 millimeters, alternative to take d=12 Millimeter, remaining is identical.

When the present embodiment is placed in metal surface, in two frequency ranges of WIFI, also there is approximate isotropic directivity in horizontal plane, That is curve B, on the vertical plane also approximately at one-way radiation, i.e. curve A, as shown in Figure 10,11.

In summary, when the WIFI flat plane antennas TA of conventional design is placed in metal surface, the impedance operator of antenna is bright Aobvious deterioration causes to use, but when the present embodiment is placed in into metal surface, antenna can WIFI 2.4-2.485 GHz frequencies Section and 5.15-5.825 GH frequency ranges have good impedance operator and more satisfied antenna pattern.

Claims (4)

1. a kind of anti-metal device, it is characterised in that:Including 64 periodic arrangements on two dimensional surface, seamless spliced multiple Electro-magnetic bandgap unit, the electro-magnetic bandgap unit is the plate that upper bottom surface is square, and the bottom surface length of side is Lx, and plate thickness is H, be divided into above and below two layers, lower floor is dielectric layer, and upper strata is metal level, is docked by side with the side of other electro-magnetic bandgap units Realize seamless spliced, three slit regions are distributed with the metal level:
First slit region includes four wide straight slot lines that head and the tail right angle is connected successively, and line width is Ws, and line length is 0.17Lx, The straight slot line is parallel and equal with four back gauges with the side of electro-magnetic bandgap unit bottom surface four respectively;
Second slit region includes four the first flanging U-shaped slot line units that head and the tail are connected successively, the first flanging U-shaped Slot line unit includes a base slot line, two isometric side slot lines and two isometric flanging slot lines, two The side slot line is located at the same side of the base slot line, respectively the two ends by one end respectively with the base slot line Connection at a right angle, forms a U-shaped structure, one end by the other end respectively with two flanging slot lines connects at a right angle Connect, two flanging slot lines are located at the outside of the U-shaped structure;The base slot line, side slot line and turn up Side slot line is wide, and width is Ws, and side gap line length is 0.09Lx, a length of 0.17Lx of base slot line, institute State a length of 0.165Lx of flanging slot line;The U-shaped bossing of each first flanging U-shaped slot line unit is towards institute State electro-magnetic bandgap unit metal layer center, the base slot line it is parallel with the side of electro-magnetic bandgap unit bottom surface four respectively and with Four back gauges are equal;
3rd slit region includes four the second flanging U-shaped slot line units and eight right angle L-shaped slot line units, described second Flanging U-shaped slot line unit has the same shape and dimensions with the first flanging U-shaped slot line unit, the L-shaped Slot line includes one long side slot line and a short side slot line, and long side seam gap line length is 0.25Lx, and width is 0.5Ws, short Side seam gap line length is 0.15Lx, and width is Ws, and the long side seam gap line endpoints of L-shaped slot line unit in right angle described in each two are connected, Tie point is located at four summits of electro-magnetic bandgap unit metal layer respectively, the long side slot line outer side edges along respectively with institute State four side of electro-magnetic bandgap unit metal layer to overlap, the short side slot line is located at the electro-magnetic bandgap metal layer itself, four institutes Short side end points of two end points of the second flanging U-shaped slot line unit respectively with two L-shaped slot lines is stated to be connected, it is each described The U-shaped bossing of second flanging U-shaped slot line unit is towards the electro-magnetic bandgap unit bottom center.
2. anti-metal device according to claim 1, it is characterised in that:The parameter of the electro-magnetic bandgap unit is that Lx is 14 ~18 millimeters, Ws is 0.4~1.8 millimeter.
3. a kind of WIFI antennas, including a signal receiver, it is characterised in that also including an anti-metal device, the anti-gold Belonging to device includes 64 periodic arrangements on two dimensional surface, seamless spliced multiple electro-magnetic bandgap units, the electro-magnetic bandgap Unit is the square plate that the length of side is Lx, and thickness is h, be divided into above and below two layers, lower floor is dielectric layer, and upper strata is metal level, lead to Cross side and docked with the side of other electro-magnetic bandgap units and realize seamless spliced, three slit regions are distributed with the metal level:
First slit region includes four wide straight slot lines that head and the tail right angle is connected successively, and line width is Ws, and line length is 0.17Lx, The straight slot line is parallel and equal with four back gauges with the side of electro-magnetic bandgap unit bottom surface four respectively;
Second slit region includes four the first flanging U-shaped slot line units that head and the tail are connected successively, the first flanging U-shaped Slot line unit includes a base slot line, two isometric side slot lines and two isometric flanging slot lines, two The side slot line is located at the same side of the base slot line, respectively the two ends by one end respectively with the base slot line Connection at a right angle, forms a U-shaped structure, one end by the other end respectively with two flanging slot lines connects at a right angle Connect, two flanging slot lines are located at the outside of the U-shaped structure;The base slot line, side slot line and turn up Side slot line is wide, and width is Ws, and side gap line length is 0.09Lx, a length of 0.17Lx of base slot line, institute State a length of 0.165Lx of flanging slot line;The U-shaped bossing of each first flanging U-shaped slot line unit is towards institute State electro-magnetic bandgap unit metal layer center, the base slot line it is parallel with the side of electro-magnetic bandgap unit bottom surface four respectively and with Four back gauges are equal;
3rd slit region includes four the second flanging U-shaped slot line units and eight right angle L-shaped slot line units, described second Flanging U-shaped slot line unit has the same shape and dimensions with the first flanging U-shaped slot line unit, the L-shaped Slot line includes one long side slot line and a short side slot line, and long side seam gap line length is 0.25Lx, and width is 0.5Ws, short Side seam gap line length is 0.15Lx, and width is Ws, and the long side seam gap line endpoints of L-shaped slot line unit in right angle described in each two are connected, Tie point is located at four summits of electro-magnetic bandgap unit metal layer respectively, the long side slot line outer side edges along respectively with institute State four side of electro-magnetic bandgap unit metal layer to overlap, the short side slot line is located at the electro-magnetic bandgap metal layer itself, four institutes Short side end points of two end points of the second flanging U-shaped slot line unit respectively with two L-shaped slot lines is stated to be connected, it is each described The U-shaped bossing of second flanging U-shaped slot line unit is towards the electro-magnetic bandgap unit bottom center.
4. WIFI antennas according to claim 3, it is characterised in that:The parameter of the electro-magnetic bandgap unit is Lx for 14~ 18 millimeters, Ws is 0.4~1.8 millimeter.
CN201410043435.4A 2014-01-29 2014-01-29 A kind of anti-metal device and WIFI antennas CN104659485B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104659478B (en) * 2014-01-29 2017-09-05 广西科技大学 Flat aerial
WO2017156906A1 (en) * 2016-03-18 2017-09-21 广东欧珀移动通信有限公司 Metal shell, antenna apparatus, and mobile terminal

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4906585B2 (en) * 2007-05-16 2012-03-28 三菱電機株式会社 EBG material
CN102456951A (en) * 2010-10-14 2012-05-16 中国移动通信集团江苏有限公司 Base station antenna
CN102820501A (en) * 2012-07-03 2012-12-12 北京邮电大学 Ultra wideband antenna-oriented crossed H-shaped slot fractal UC-EBG (Uniplanar Compact Electromagnetic bandgap) structure and design method thereof
CN102834974A (en) * 2010-04-28 2012-12-19 古河电气工业株式会社 Plane-structured ebg
CN203747039U (en) * 2014-01-29 2014-07-30 广西科技大学 Anti-metal device and WIFI antenna

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9407011B2 (en) * 2012-02-22 2016-08-02 The United States Of America As Represented By The Secretary Of The Army Broadband electromagnetic band-gap (EBG) structure

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4906585B2 (en) * 2007-05-16 2012-03-28 三菱電機株式会社 EBG material
CN102834974A (en) * 2010-04-28 2012-12-19 古河电气工业株式会社 Plane-structured ebg
CN102456951A (en) * 2010-10-14 2012-05-16 中国移动通信集团江苏有限公司 Base station antenna
CN102820501A (en) * 2012-07-03 2012-12-12 北京邮电大学 Ultra wideband antenna-oriented crossed H-shaped slot fractal UC-EBG (Uniplanar Compact Electromagnetic bandgap) structure and design method thereof
CN203747039U (en) * 2014-01-29 2014-07-30 广西科技大学 Anti-metal device and WIFI antenna

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