CN105122543A - System for fastening a flat radome onto the concave reflector of an antenna - Google Patents
System for fastening a flat radome onto the concave reflector of an antenna Download PDFInfo
- Publication number
- CN105122543A CN105122543A CN201480010762.8A CN201480010762A CN105122543A CN 105122543 A CN105122543 A CN 105122543A CN 201480010762 A CN201480010762 A CN 201480010762A CN 105122543 A CN105122543 A CN 105122543A
- Authority
- CN
- China
- Prior art keywords
- flange portion
- reflector
- antenna
- equipment
- lower flange
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/246—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for base stations
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/42—Housings not intimately mechanically associated with radiating elements, e.g. radome
Abstract
The invention provides a system for fastening a flat radome onto the concave reflector of an antenna. The device for fastening a flat radome onto a concave antenna reflector, the radome having an outer surface and an inner surface and the reflector having an outer surface and an inner surface, the inner surface of the radome and the inner surface of the reflector facing one another, which device comprises an upper flange part placed against the outer surface of the radome and covering the peripheral segment of the reflector and of the radome, and a lower flange part placed against the outer surface of the reflector, having a shape adapted to the profile of the outer surface of the reflector, and comprising at least one electromagnetic trap. Preferentially, the electromagnetic trap has the shape of a conductive-surface slot having a width on the order of one-tenth the antenna's working wavelength and a depth on the order of one-quarter of that wavelength. According to one variant, the electromagnetic trap further comprises an edge along the slot.
Description
Technical field
The present invention relates to wireless aerial field, particularly relating to the system for being fixed to by flat plane antenna cover on the concave reflector of antenna.
Background technology
Wireless aerial is normally used for mobile communications network.This antenna comprises the main reflector usually with concave surface, and it can have the axisymmetric parabolic shape of the symmetry axis about antenna, and has the feeding device that the symmetry axis along antenna arranges, for being conveyed through the electromagnetic wave that antenna sends or receives.Be associated with radome, have and surround the impervious protective surface of reflector relative to the space of circumscribe.This radome can be flexible or rigidity.Planar rigidity radome, as the type nowadays the most often used, show for such as rain, wind or avenge such ambient weather environment good repellence advantage.
Therefore, be necessary to guarantee firmly to fix, especially can resist blast, particularly for large diameter reflector.Fixed system also must quick-detachment/re-assembly, and does not damage the radome on reflector.
Pencil-beam antenna for radio link application has distinctive radiation pattern, and it comprises main lobe and close to the secondary lobe suppressed, particularly in backward directions, being namely+90 to+180 degree in side, is-90 to-180 degree at opposite side.Antenna back side to leakage rediation there is multiple source.Some undesirable radiation are that each parts of described antenna are reflector, protective cover, radome mounting flange and radome particularly because the scattering of wave on the peripheral edge of spilling, reflector or protective cover and RF radio wave are by containing the leakage of the small gap of the air existed between each parts of antenna.Due to the additivity of the ripple of flange scattering, on-180 degree and+180 degree directions, this FAQs is more serious, and owing to having the track of the ripple of identical physical length, these ripples have identical phase place.All these cause the reason of leakage rediation to cause the destruction of one of them key parameter to radio link antenna: its front-to-back ratio (F/B), it causes the reduction of antenna efficiency.
Conventional solution uses a braid shielded, the electrical contact between which improving for the parts of fixed antenna cover.These braid shieldeds may be added to all crosspoints, and at described crosspoint place, two parts, such as protective cover, reflector, flange and reflector, contact with each other.The major defect of this solution is its extra cost, the increase of the time particularly needed for number of components and assembling aerial.This component calls is handled with care, and which further increases installation cost.
Summary of the invention
Therefore propose a solution, to reduce the leakage rediation of the ripple of the backward directions of the antenna with concave reflector, thus improve the front-to-back ratio of the radiation pattern of multiple microwave band.The solution proposed is a kind of equipment for being fixed to by the radome of plane, rigidity on concave reflector.Permanent plant must be suitable for the fixing radome that can be formed by rigid material especially, described rigid material be such as non-can hot working material, comprise the low density material of such as multilayer or honeycomb style.Permanent plant must be also firm, reliable, cheap, and easily implements during assembly and disassembly.
Theme of the present invention is a kind of equipment for being fixed to by flat plane antenna cover on concave surface antenna reflector, and radome has outer surface and inner surface, and reflector has outer surface and inner surface, the inner surface of radome and the inner surface of reflector facing with each other.This equipment comprises
-upper flange portion, is arranged to the described outer surface against described radome and covers the peripheral part of described reflector and described radome, and
-lower flange portion, is arranged to the described outer surface against described reflector.
Lower flange portion has the shape of the profile of the described outer surface being suitable for described reflector, and comprises at least one electromagnetism trap.
Electromagnetism trap can be arranged on the described upper surface of the described outer surface towards described reflector in described lower flange portion, or be arranged in described lower flange portion towards on the side surface in described upper flange portion.
According to an embodiment, electromagnetism trap can have the shape of groove, and this groove has conductive surface.Preferably, this groove is metal or is made up of the plastics of washing.
According to an aspect, this groove has straight or oblique sidewall.This groove can have a cross section, and this cross section is selected from flat U-shaped cross section, round bottom U-shaped cross section and V-arrangement cross section.
According to another aspect, the width of groove is the magnitude of the mark of antenna operating wavelength.Preferably, the width of groove is the magnitude of 1/10th of the operation wavelength of antenna.
According to another aspect, groove has the degree of depth of the magnitude of 1/4th of operation wavelength for antenna.
According to a kind of modification, electromagnetism trap comprises the edge along groove further.Preferably, the width at edge is the magnitude of 1/4th of the operation wavelength of antenna.
According to an embodiment, the surface in lower flange portion and the surface contact in upper flange portion, the surface in lower flange portion and the surface in upper flange portion form acute angle.
According to an embodiment, the upper surface in lower flange portion comprises at least one relief further.Preferably, relief has the height being less than 5 millimeters.
According to another embodiment, the upper surface in lower flange portion and the outer surface of reflector form acute angle.
This shape unique for lower flange portion provides, to improve the radio contact between radome and reflector.This unique shape in lower flange portion combines with the existence of electromagnetism trap, to reduce the leakage rediation of RF ripple.By this way, do not need braid shielded, and avoid all shortcomings that it brings.Electromagnetism trap is quarter-wave type, mean its degree of depth close to antenna center operating wavelength 1/4th.
Wireless aerial comprises the equipment for being fixed to by flat plane antenna cover on concave surface antenna reflector, and radome has outer surface and the inner surface towards reflector, and reflector has outer surface and the inner surface towards radome, and this equipment comprises:
-upper flange portion, is arranged to the described outer surface against described radome and covers the peripheral part of described reflector and described radome, and
-lower flange portion, is arranged to the described outer surface against described reflector, has the shape of the profile of the described outer surface being suitable for described reflector, and comprises at least one electromagnetism trap.
The microwave antenna comprising this permanent plant, in the leakage backward radiation caused due to spilling and scattering of wave and in front-to-back ratio (F/B), shows performance more better than existing antenna.When disposing the current and following network, the wireless aerial comprising this permanent plant shows very outstanding advantage from client, because have the isolation of better radio between antenna, this improvement makes the more intensive network with high power capacity become possibility.
Antenna can be applicable to the microwave frequency of wide region.It is not Parabolic antenna that permanent plant also can be applied to reflector, such as, have the antenna of the square reflector for base station.
Accompanying drawing explanation
By reading the description of a following embodiment, characteristics and advantages of the present invention will become apparent, and the description of embodiment is naturally provided by non-limiting example and accompanying drawing, wherein:
-Fig. 1 is the schematic sectional view of an embodiment of the connection described between antenna reflector and radome,
-Fig. 2 is the perspective view of another embodiment of the connection described between antenna reflector and radome,
-Fig. 3 a and 3b shows the comparison of prior art antenna and the radiation diagram according to the 18.7GHz frequency range in the horizontal plane of the antenna of the embodiment of Fig. 1; The intensity of the radiation I in units of dB provides in y-axis, and the sending/receiving angle α in units of spending provides in x-axis;
-Fig. 4 is the schematic sectional view of the antenna with parabolic shape reflector, and it comprises according to the connection between the reflector of the embodiment of Fig. 1 and radome.
Embodiment
Fig. 1 shows the sectional view of the join domain between flat plane antenna cover 1 and concave reflector 2.Permanent plant 3 comprises upper flange portion 4 and lower flange portion 5.The insulated peripheral edge 6 of radome and the conduction peripheral edge 7 of reflector 2 are clipped between the upper flange portion 4 of permanent plant 3 and lower flange portion 5.Upper flange portion 4 and the lower flange portion 5 of permanent plant 3 are made up of electric conducting material, preferred metal materials.Upper flange portion 4 and the lower flange portion 5 of permanent plant 3 are fixed to each other, such as, by screw, folder or other similar devices.
The principal risk that this assembly presents is the peripheral edge 6 of radio wave leakage through radome 1 and the space of the peripheral edge 7 of reflector 2, the peripheral edge 7 of reflector 2 and lower flange portion 5 and existence lower flange portion 5 and upper flange portion 4, thus increases the front-to-back ratio of antenna ra-diation pattern.The standard be suitable for, such as ETSI3 class standard, requires very high front-to-back ratio, to guarantee the high-level radio isolation between the antenna of same position.
In order to not use optional feature (such as braid shielded) to reduce leakage rediation, proposing and only using the mounting flange 3 formed by top 4 and bottom 5 to come assembling aerial cover 1 and reflector 2.Upper flange portion 4 is such as L shapes, and its first branch 11 is resisted against the outer surface 10 of the peripheral edge 6 of radome 1, and the covering of the second branch 12 is positioned at the periphery 8 of the radome 1 of adjacent position and the periphery 9 of reflector 2.
Lower flange portion 5 has the shape of the profile of the outer surface being suitable for reflector 2, such as, have the cross section that conventional shape is generally triangular.In this example, the conventional shape in lower flange portion 5 is close to right-angled triangle 13.The length of right-angled triangle corresponds to the upper surface 14 in lower flange portion 5, upper surface 14 with against the outer surface 15 of peripheral edge 7 of reflector 2 coordinate.The height of right-angled triangle corresponds to the side surface 16 with lower flange portion 5, and side surface 16 contacts with the surface 17 of second branch 12 in upper flange portion 4.
The side surface 16 in lower flange portion 5 tilts, and the plane 18 of the contact-making surface 17 of second branch 12 in itself and upper flange portion 4 forms non-zero acute angle β.When upper flange portion 4 and lower flange portion 5 each other tight abutment time, this inclination can reduce the gap between upper flange portion 4 and lower flange portion 5.This shape can improve the electrical contact with upper flange portion 4.Angle beta is strictly greater than 0 °, preferably about 10 °.
At least one electromagnetism trap is based upon in lower flange portion 5.Electromagnetism trap 19 can be the shape of the groove with conductive wall.In the illustrated embodiment, electromagnetism trap 19 is arranged on the upper surface 14 in lower flange portion 5, near side surface 16.Other electromagnetism traps also can be arranged on the upper surface 14 in lower flange portion 5, and on the side surface 16.
The upper surface 14 in lower flange portion 5 also can arrange one or more relief 20.These reliefs 20 can be arranged on the end in the lower flange portion 5 relative with side surface 16.These reliefs 20 have the height being less than 5mm, are preferably about 1mm.Relief 20 can improve the contact between the outer surface 15 of the upper surface 14 in lower flange portion 5 and the peripheral edge 7 of reflector 2.
According to unshowned a kind of modification, the narrower physical contact between the outer surface 15 of lower flange portion 5 and reflector 2 also can be guaranteed by the inclination of the upper surface 14 in lower flange portion 5, and the upper surface 14 in lower flange portion 5 forms acute angle with the outer surface 15 of reflector 2.Instantly flange portion 5 and reflector 2 are closely against time each other, and this can reduce the gap between two parts.
Fig. 2 shows the perspective view of another embodiment in lower flange portion 30, and the inside in lower flange portion 30 is hollowed out from the surface of the hypotenuse 31 corresponding to right-angled triangle 32, and right-angled triangle 32 represents the shape in lower flange portion 30 approx.Lower flange portion 30 is formed by the material of conductive surface, such as metal or have the plastics of the coat of metal.
Lower flange portion 30 comprises electromagnetism trap, its similar groove 33 in the upper surface 34 in lower flange portion 30 of shape.Groove 33 is arranged near the side surface 35 in the lower flange portion 30 of the height corresponding to right-angled triangle 32.Groove 33 has width G and degree of depth P, and width G and degree of depth P depend on the operation wavelength λ of antenna.The operating principle of such electromagnetism trap is based on such fact, and namely its produces local wave phase skew, and then it to be placed in the phase place contrary with main ripple and to be cancelled.The width G of groove 33 is the magnitude of 1/10th of the operation wavelength λ of antenna.The degree of depth G of groove 33 is the magnitude of 1/4th of the operation wavelength λ of antenna.Therefore, any potential hazard of the radio leakage between reflector 2 and lower flange portion 30 is minimized.
Groove 33 has sidewall, and it can be straight or tilt.Groove 33 can have flat U-shaped section, the U-shaped section of round bottom and V-shaped section.
Electromagnetism trap may further include the edge 36 along groove 33.The thickness E at edge 36 is preferably the magnitude of 1/4th of the operation wavelength λ of antenna.Height difference H between the wall 38 of the wall 37 of the groove 33 on edge 36 sidepiece and the groove 33 on opposite side is very little, and it is the magnitude of 1/10th of the operation wavelength λ of antenna.
The upper surface 34 in lower flange portion 30 and/or side surface 35 can comprise other electromagnetism traps.The upper surface 34 in lower flange portion 30 can arrange one or more relief 39 further, such as, form groove.
Fig. 3 a and 3b shows the radiation diagram of the antenna in the horizontal plane in 18.7GHz frequency range.On these two figure, continuous print datum line 40 represents the standard profile corresponding to ETSI3 class model.
In fig. 3 a, have secondary lobe 42 relative to the figure of the radiation 41 of prior art antenna, it exceedes etsi standard.
By contrast, the secondary lobe 43 comprising radiation Figure 44 of the antenna of previously described permanent plant greatly reduces.The value of radiation diagram remains the maximum of the ETSI3 class template permission within the scope of sending/receiving.This shows, permanent plant is the effective way that a kind of minimizing moves to the leakage rediation of the ripple at the antenna back side.
The antenna 50 with parabolic shape reflector 51 and planar rigidity cover 52 schematically shows in the diagram.Radome 52 comprises outer surface 53 and inner surface 54.Reflector 51 comprises outer surface 55 and inner surface 56.The inner surface 54 of radome 52 and the inner surface 56 of reflector 51 facing with each other.The peripheral edge of radome 52 is adhered to the peripheral edge of reflector 51.All these edges are sandwiched between the upper flange portion 57 of permanent plant and lower flange portion 58.
Naturally, the invention is not restricted to described embodiment, but be limited to the attainable many modification of those skilled in the art, and do not deviate from spirit of the present invention.The scheme proposed is not limited to specific Microwave Frequency Domain; On the contrary, it goes for having the different frequency domains of the size being suitable for respective wavelength.
Claims (15)
1. one kind for being fixed to the equipment on concave surface antenna reflector by flat plane antenna cover, described radome has outer surface and inner surface, and described reflector has outer surface and inner surface, the described inner surface of described radome and the described inner surface of described reflector facing with each other, described equipment comprises:
-upper flange portion, is arranged to the described outer surface against described radome and covers the peripheral part of described reflector and described radome, and
-lower flange portion, is arranged to the described outer surface against described reflector, has the shape of the profile of the described outer surface being suitable for described reflector, and comprises at least one electromagnetism trap.
2. equipment according to claim 1, wherein said electromagnetism trap is arranged on the described upper surface of the described outer surface towards described reflector in described lower flange portion, or be arranged in described lower flange portion towards on the side surface in described upper flange portion.
3., according to the equipment one of claim 1 and 2 Suo Shu, wherein said electromagnetism trap has the shape of conductive surface groove.
4. equipment according to claim 3, wherein said groove has sidewall that is straight or that tilt.
5. according to the equipment one of claim 3 and 4 Suo Shu, wherein said groove has cross section, and described cross section is selected from flat U-shaped cross section, the U-shaped cross section of round bottom and V-arrangement cross section.
6., according to the equipment one of claim 3 to 5 Suo Shu, the width of wherein said groove is the magnitude of the mark of the operation wavelength of antenna.
7. equipment according to claim 6, the width of wherein said groove is the magnitude of 1/10th of the operation wavelength of described antenna.
8., according to the equipment one of claim 6 and 7 Suo Shu, the degree of depth of wherein said groove is the magnitude of 1/4th of the operation wavelength of described antenna.
9., according to the equipment one of claim 3 to 8 Suo Shu, wherein said electromagnetism trap comprises the edge along described groove further.
10. equipment according to claim 9, the width at wherein said edge is the magnitude of 1/4th of the operation wavelength of antenna.
11. according to the equipment one of aforementioned claim Suo Shu, a surface in wherein said lower flange portion and the surface contact in described upper flange portion, and the described surface in described lower flange portion and the described surface in described upper flange portion form acute angle.
12. according to the equipment one of claim 1 to 11 Suo Shu, the described upper surface in wherein said lower flange portion with at least one relief for feature.
13. equipment according to claim 12, wherein said relief has the height being less than 5 millimeters.
14. according to the equipment one of claim 1 to 11 Suo Shu, and the described upper surface in wherein said lower flange portion and the described outer surface of described reflector form acute angle.
15. 1 kinds of wireless aerials, comprise according to one of aforementioned claim Suo Shu for flat plane antenna cover being fixed to the equipment on concave surface antenna reflector.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP13305221.7 | 2013-02-27 | ||
| EP13305221.7A EP2772985B1 (en) | 2013-02-27 | 2013-02-27 | System for attaching a planar radome to the concave reflector of an antenna |
| PCT/IB2014/059234 WO2014132190A1 (en) | 2013-02-27 | 2014-02-25 | System for fastening a flat radome onto the concave reflector of an antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105122543A true CN105122543A (en) | 2015-12-02 |
| CN105122543B CN105122543B (en) | 2018-03-20 |
Family
ID=47844235
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201480010762.8A Active CN105122543B (en) | 2013-02-27 | 2014-02-25 | System for being fixed to flat plane antenna cover on the concave reflector of antenna |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2772985B1 (en) |
| CN (1) | CN105122543B (en) |
| WO (1) | WO2014132190A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113424364A (en) * | 2019-03-14 | 2021-09-21 | 华为技术有限公司 | Redirecting structures for electromagnetic waves |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3001504B1 (en) * | 2014-09-24 | 2019-09-11 | Alcatel- Lucent Shanghai Bell Co., Ltd | Assembly device for attaching an element provided with a flat flange on a substrate |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0583022A (en) * | 1991-05-21 | 1993-04-02 | Toppan Printing Co Ltd | Plane antenna |
| JP2007251615A (en) * | 2006-03-16 | 2007-09-27 | Nec Corp | Assembling method of parabolic antenna, assembling jig, and radome attachment fittings |
| WO2008121428A2 (en) * | 2007-02-16 | 2008-10-09 | Cushcraft Corporation | System and method for providing antenna radiation pattern control |
| CN201523074U (en) * | 2009-07-15 | 2010-07-07 | 江苏华灿电讯股份有限公司 | Dual-polarized intelligent integrated antenna |
| JP2010278736A (en) * | 2009-05-28 | 2010-12-09 | Japan Radio Co Ltd | Waterproof structure of protection case |
| CN102714343A (en) * | 2009-12-11 | 2012-10-03 | 安德鲁有限责任公司 | Reflector antenna radome attachment band clamp |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4581615A (en) * | 1983-02-08 | 1986-04-08 | Levy Stanley P | Double reflector antenna with integral radome reflector support |
| SE512439C2 (en) * | 1998-06-26 | 2000-03-20 | Allgon Ab | Dual band antenna |
-
2013
- 2013-02-27 EP EP13305221.7A patent/EP2772985B1/en active Active
-
2014
- 2014-02-25 CN CN201480010762.8A patent/CN105122543B/en active Active
- 2014-02-25 WO PCT/IB2014/059234 patent/WO2014132190A1/en active Application Filing
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0583022A (en) * | 1991-05-21 | 1993-04-02 | Toppan Printing Co Ltd | Plane antenna |
| JP2007251615A (en) * | 2006-03-16 | 2007-09-27 | Nec Corp | Assembling method of parabolic antenna, assembling jig, and radome attachment fittings |
| WO2008121428A2 (en) * | 2007-02-16 | 2008-10-09 | Cushcraft Corporation | System and method for providing antenna radiation pattern control |
| JP2010278736A (en) * | 2009-05-28 | 2010-12-09 | Japan Radio Co Ltd | Waterproof structure of protection case |
| CN201523074U (en) * | 2009-07-15 | 2010-07-07 | 江苏华灿电讯股份有限公司 | Dual-polarized intelligent integrated antenna |
| CN102714343A (en) * | 2009-12-11 | 2012-10-03 | 安德鲁有限责任公司 | Reflector antenna radome attachment band clamp |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113424364A (en) * | 2019-03-14 | 2021-09-21 | 华为技术有限公司 | Redirecting structures for electromagnetic waves |
| CN113424364B (en) * | 2019-03-14 | 2023-05-09 | 华为技术有限公司 | Electronic equipment |
| US11955711B2 (en) | 2019-03-14 | 2024-04-09 | Huawei Technologies Co., Ltd. | Redirecting structure for electromagnetic waves |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2014132190A1 (en) | 2014-09-04 |
| EP2772985B1 (en) | 2018-08-08 |
| CN105122543B (en) | 2018-03-20 |
| EP2772985A1 (en) | 2014-09-03 |
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