CN201584501U - Downtilt beam high-gain sector antenna unit and integral antenna usable in base stations - Google Patents

Downtilt beam high-gain sector antenna unit and integral antenna usable in base stations Download PDF

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Publication number
CN201584501U
CN201584501U CN2009202559429U CN200920255942U CN201584501U CN 201584501 U CN201584501 U CN 201584501U CN 2009202559429 U CN2009202559429 U CN 2009202559429U CN 200920255942 U CN200920255942 U CN 200920255942U CN 201584501 U CN201584501 U CN 201584501U
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China
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resonant cavity
circular arc
feed
unit
beam high
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Expired - Fee Related
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CN2009202559429U
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Chinese (zh)
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刘震国
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Southeast University
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Southeast University
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Priority to CN2009202559429U priority Critical patent/CN201584501U/en
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Abstract

The utility model discloses a downtilt beam high-gain sector antenna unit and an integral antenna usable in base stations, which comprise feed sources and a resonant cavity. The resonant cavity is formed together by a cylindrical grounding plate and a partially reflecting surface which is formed by combining a plurality of annular metal straps with unequal widths and coaxial with the cylindrical grounding plate. A rectangular reflecting plate arranged in the resonant cavity is connected with the cylindrical grounding plate and divides the resonant cavity into a plurality of resonant cavity units respectively with fan-shaped cross section and two open end faces. The feed sources are disposed in the resonant cavity units, and amount of the feed sources is equal to that of the resonant cavity units. Distance between the outer surface of the cylindrical grounding plate and the partially reflecting surface meets certain resonance conditions. A sector antenna with downtilt beam is formed by each resonant cavity unit and the feed source arranged therein and realizes communication coverage of a certain sector. A plurality of sector antennas form the downtilt beam high-gain sector integral antenna to realize communication coverage of a whole working area.

Description

The downwards bevel beam high gain sector antenna unit and the integral antenna that can be used for the base station
Technical field
The utility model relates to a kind of high-gain aerial of downwards bevel beam, relates in particular to a kind of wave beam that is used for the base station that can realize high-gain can have a down dip sector antenna unit and integral antenna thereof.
Background technology
The high gain sector antenna that is used for base station communication at present is half-wave dipole or its modification structures of band ground plate mostly by the unit, constitute a fan antenna by the group battle array and realize that the communication of certain sector covers, the communication that utilizes a plurality of fan antennas to finish in the whole zone covers.But the fan antenna that constitutes by group battle array mode need feeder network be realized the feed of each unit.So feeder network complex structure of antenna.Secondly, need vertically organize battle array than multiple unit usually for realizing high-gain and remedying the decay that causes by feeder network, thereby make that the longitudinal size of antenna is bigger.In addition, disturb most method of downwards bevel beam that adopts to improve the communication covering of sector for making full use of radiant power and reducing to distinguish more, and mainly adopt mechanical adjustment method and electric accent method to realize downwards bevel beam at present.
Summary of the invention
Technical problem: the technical problems to be solved in the utility model provides a kind of simple in structure, need not any additional feeder network can realize in high-gain, can be used for the downwards bevel beam high gain sector antenna unit and the integral antenna of base station.
Technical scheme: downwards bevel beam high gain sector antenna unit and the integral antenna that can be used for the base station of the present utility model is made up of feed resonant cavity unit two parts, the resonant cavity unit is by the circular arc ground plate, circular arc shaped portion reflecting surface and the rectangular reflection plate that links to each other with above-mentioned circular arc ground plate constitute jointly, the circular arc ground plate adopts one section arc cylinder, the circular arc shaped portion reflecting surface adopts with the coaxial a plurality of circular arc metal bands along the axis direction width gradual change of ground plate and combines, and the distance between circular arc ground plate outer surface and the circular arc shaped portion reflecting surface is satisfied d = ( 1 2 + n ) λ 0 , n = 0,1,2 . . . , λ wherein 0Be the electromagnetic free space wavelength of centre frequency.
The width of described circular arc metal band is 0.01～0.03 times of free space wavelength of design center frequency, and the width of air gap is 0.005～0.01 times of free space wavelength of design center frequency.
Described feed is made of half-wave dipole or its modification structures.
Integral antenna of the present utility model comprises feed resonant cavity two parts, resonant cavity is by cylindrical grounding plate, and a plurality of partial reflection surperficial common formations that along the circular ring metal band of axis direction width gradual change combine coaxial with cylindrical grounding plate, being provided with the rectangular reflection plate that links to each other with above-mentioned cylindrical grounding plate in described resonant cavity, is resonant cavity unit fan-shaped, that both ends of the surface are open thereby resonant cavity is divided into a plurality of cross sections; Feed lays respectively in described each resonant cavity unit, and the feed number is identical with the resonant cavity unit number; Distance between the outer surface of cylindrical grounding plate and the partial reflection surface satisfies d = ( 1 2 + n ) λ 0 , n = 0,1,2 . . . , λ wherein 0Be the electromagnetic free space wavelength of centre frequency.
Described partial reflection surface a plurality ofly is made up of along the circular ring metal band of axis direction width gradual change and the air gap between the circular ring metal band described.Described feed is made of half-wave dipole or its modification structures.0.01～0.03 times of the free space wavelength that described circular ring metal strip width is a design center frequency, the width of air gap are 0.005～0.01 times of free space wavelength of design center frequency.
Beneficial effect: compare with the relevant high gain sector antenna that is used for the downwards bevel beam of base station communication, the utility model is simple in structure, and longitudinal size is less, does not need to adopt array structure can realize high-gain, and has between each fan antenna high the isolation.With traditional be half-wave dipole or its modification structures, microband paste with the unit, compare by the fan antenna that group battle array mode constitutes, the utility model is by adopting cylindrical grounding plate (cylinder can be solid or hollow), rectangular reflection plate and common to constitute the cross section be fan-shaped with the coaxial partial reflection surface of ground plate, the resonant cavity unit that both ends of the surface are opened.Utilize resonance characteristic to make and need not adopt array structure, do not need complicated feeder network, under less longitudinal size, the gain of antenna can be significantly improved.Owing to adopt the rectangular reflection plate effectively to be divided into cylindrical grounding plate and the partial reflection surface common both ends of the surface that the constitute open resonant cavity coaxial a plurality of relatively independent with it, cross section is fan-shaped identical resonant cavity unit, each resonant cavity unit and corresponding feed constitute a high-gain, radiation areas become the fan antenna of fan-shaped distribution, so have higher isolation between each fan antenna.Owing to adopted the partial reflection surface that combines along the circular ring metal band of axis direction width gradual change, utilize circular ring metal band that width do not wait that the difference of electromagnetic wave direction guiding has been realized downwards bevel beam, and the width by regulating the circular ring metal band with (or) air gap width of circular ring metal bar interband can realize the adjusting at downwards bevel beam angle.Because the method that the present invention obtains high-gain is different from the method that traditional employing array structure is realized high-gain, therefore effectively overcome blind spot (corresponding to the zero point in the directional diagram) appears covering in the latter in actual applications in the overlay area shortcoming.
At last, in the resonance sector integral antenna of the high-gain of downwards bevel beam of the present invention, can according in the practical application to the requirement of horizontal plane wave beam, reasonably increase or reduce the number of rectangular reflection plate.
Description of drawings
Fig. 1 is a general structure schematic perspective view of the present utility model;
Fig. 2 is the vertical view of the general structure of the utility model integral antenna;
Fig. 3 is the structural representation on partial reflection surface among Fig. 1 of the present utility model, Fig. 2;
Fig. 4 is the independently downwards bevel beam high gain sector antenna structure vertical view that is made of the single resonant cavity unit feed corresponding with it among Fig. 1 of the present utility model and Fig. 2;
Fig. 5 is the independently downwards bevel beam high gain sector antenna three-dimensional structure diagram that is made of the single resonant cavity unit feed corresponding with it among Fig. 1 of the present utility model and Fig. 2;
Fig. 6 is the frequency response curve figure of the RL return loss of the downwards bevel beam high-gain sector location antenna that provides of the utility model;
Fig. 7 is different units isolation between antennae frequency response curve figure in the downwards bevel beam high-gain sector integral antenna that provides of the utility model;
Fig. 8 is the horizontal plane radiation pattern of the downwards bevel beam high-gain sector location center of antenna frequency that provides of the utility model;
Fig. 9 is the vertical plane radiation patterns of the downwards bevel beam high-gain sector location center of antenna frequency that provides of the utility model.
Have among the above figure: the air gap 412 between the air gap 43 between feed 1, resonant cavity 2, resonant cavity unit 21, cylindrical grounding plate 3, circular arc ground plate 31, partial reflection surface 4, circular ring metal band 42, the circular ring metal band, circular arc shaped portion reflecting surface 41, circular arc metal band 411, the circular arc metal band, rectangular reflection plate 5.
R is the radius of downwards bevel beam high-gain sector integral antenna, r is the radius of cylindrical grounding plate 3, d is the outer surface of cylindrical grounding plate and the distance between the partial reflection surface, and w is the width of circular ring metal band 41, and L is the height of high-gain sector integral antenna.
Embodiment
Below in conjunction with accompanying drawing the utility model is described further.
The downwards bevel beam high gain sector antenna unit that can be used for the base station that the utility model provides, be made up of feed resonant cavity unit two parts, the resonant cavity unit reaches the rectangular reflection plate that links to each other with above-mentioned circular arc ground plate by circular arc ground plate, circular arc shaped portion reflecting surface and constitutes jointly.The circular arc ground plate adopts one section arc cylinder, and the circular arc shaped portion reflecting surface adopts coaxial and combine along a plurality of circular arc metal bands of axis direction width gradual change with ground plate.The width of circular arc metal band is 0.01～0.03 times of free space wavelength of design center frequency, and the width of air gap is 0.005～0.01 times of free space wavelength of design center frequency.Distance between circular arc ground plate outer surface and the circular arc shaped portion reflecting surface satisfies:
d = ( 1 2 + n ) λ 0 , n = 0,1,2 . . . ,
λ wherein 0Be the electromagnetic free space wavelength of centre frequency.Described feed is made of half-wave dipole or its modification structures.Single resonant cavity unit be positioned at wherein feed and can constitute a downwards bevel beam high gain sector antenna and be convenient to use to realize the covering of communicating by letter of certain sector separately.
Can make up a kind of high-gain sector integral antenna by the downwards bevel beam high gain sector antenna unit that can be used for the base station, comprise feed resonant cavity two parts, resonant cavity is by cylindrical grounding plate, and with cylindrical grounding plate coaxial and along the common formation in partial reflection surface that a plurality of circular ring metal bands of axis direction width gradual change combine, being provided with the rectangular reflection plate that links to each other with above-mentioned cylindrical grounding plate in described resonant cavity, is resonant cavity unit fan-shaped, that both ends of the surface are open thereby resonant cavity is divided into a plurality of cross sections; Feed lays respectively in described each resonant cavity unit, and the feed number is identical with the resonant cavity unit number; Distance between the outer surface of cylindrical grounding plate and the partial reflection surface satisfies d = ( 1 2 + n ) λ 0 , n = 0,1,2 . . . , λ wherein 0Be the electromagnetic free space wavelength of centre frequency.
Described partial reflection surface is made up of along a plurality of circular ring metal bands of axis direction width gradual change and the air gap between the circular ring metal band described.Described feed is made of half-wave dipole or its modification structures.Described circular ring metal strip width is for being 0.01～0.03 times of the free space wavelength of design center frequency, and the width of air gap is 0.005～0.01 times of free space wavelength of design center frequency.
Referring to Fig. 1 and Fig. 2, a kind of downwards bevel beam high-gain sector integral antenna that the utility model provides, comprise feed 1 resonant cavity 2 two parts, wherein resonant cavity is made of jointly the partial reflection surface 4 that cylindrical grounding plate 3 and a plurality of circular ring metal bands 41 along the axis direction width gradual change coaxial with it combine;
Referring to Fig. 3 partial reflection surface by forming along the circular ring metal band 42 of axis direction width w gradual change and the air gap 43 between the band.Partial reflection surface 4 is connected with rectangular reflection plate 5, and L is the total height of antenna.
Wherein common to constitute cross sections be fan-shaped cylindrical grounding plate 3, rectangular reflection plate 5 and annular partial reflection surface 4 referring to Fig. 4, a plurality of resonant cavitys unit that both ends of the surface are open.Feed is arranged in the resonant cavity unit, leaves cylindrical grounding plate and the certain distance of circular ring metal strip portion reflecting surface.Secondly, the distance between cylindrical grounding plate and the circular ring metal strip portion reflecting surface satisfies specific condition of resonance,
Promptly d = ( 1 2 + n ) λ 0 , n = 0,1,2 . . .
Constitute independently downwards bevel beam high gain sector antenna referring to Fig. 5 by the above-mentioned single resonant cavity unit feed corresponding with it; When using separately, its ground plate and partial reflection surface can be made of the part that the cylindrical grounding plate in the integral antenna of downwards bevel beam high-gain sector 3 reaches the circular ring metal strip portion reflecting surface 4 coaxial with it, be that ground plate adopts one section arc cylinder, the partial reflection surface is adopted with the coaxial curved metal band of ground plate and is combined.
The downwards bevel beam high-gain sector location that provides for the utility model referring to Fig. 6～Fig. 9 and the performance curve of integral antenna thereof.Fig. 6 is the return loss of downwards bevel beam high gain sector antenna unit; Fig. 7 is the isolation between the different antenna element of downwards bevel beam high-gain sector integral antenna; Fig. 8 and Fig. 9 are respectively the horizontal plane and the elevation radiation patytern of downwards bevel beam high gain sector antenna unit.Above-mentioned curve draws under above-mentioned specified criteria, if change the curve that structural parameters etc. also can be similarly.Curve calculation machine analog simulation obtains, and available simulation software is just like the HFSS of Ansoft company, the high frequency simulation softwares such as Microwave Studio CST of CST company.
But the utility model continuation is contained: according in the practical application to the requirement of horizontal plane wave beam, reasonably increase or reduce the number of rectangular reflection plate, thereby constitute the resonant cavity unit of different numbers by same principle.The resonant cavity unit that cylindrical grounding plate, circular ring metal strip portion reflecting surface and the rectangular reflection plate that is not connected with described partial reflection surface constitute, and the resonant cavity unit constitutes independently downwards bevel beam high gain sector antenna with the feed that is positioned at wherein thus.It is the different big or small resonant cavity unit fan-shaped, that both ends of the surface are open that the rectangular reflection plate is divided into a plurality of cross sections to resonant cavity;
Be convenient to illustrate the design process of each structural parameters, below the statement based on given structural parameters, but this and be without loss of generality.Given parameter: the radius r=10mm of cylindrical grounding plate 3, circular ring metal strip portion reflecting surface 4 is that a plurality of circular ring metal bands that R=27mm, vertical width from the 6.5mm gradual change to 4.5mm, are longitudinally arranged constitute the longitudinal length L=90mm of rectangle ground plate 5 by radius.Feed is arranged in resonant cavity, and the distance of leaving cylindrical grounding plate 3 and circular ring metal strip portion reflecting surface 4 is respectively 4mm and 11mm.Central task frequency f=12GHz.Distance between cylindrical grounding plate 3 and the annular partial reflection surface 4 is that d=(R-r) satisfies: d = 1 2 λ 0 , λ wherein 0Be the electromagnetic free space wavelength of centre frequency.

Claims (7)

1. downwards bevel beam high gain sector antenna unit that can be used for the base station, form by feed (1) resonant cavity unit (21) two parts, it is characterized in that resonant cavity unit (21) is by circular arc ground plate (31), circular arc shaped portion reflecting surface (41) and the common formation of the rectangular reflection plate (5) that links to each other with above-mentioned circular arc ground plate (31), circular arc ground plate (31) adopts one section arc cylinder, circular arc shaped portion reflecting surface (41) adopts the curved metal band that does not wait with the coaxial a plurality of width of ground plate to combine along axis direction, and the distance between circular arc ground plate (31) outer surface and the circular arc shaped portion reflecting surface (41) is satisfied d = ( 1 2 + n ) λ 0 , N=0,1,2..., wherein λ 0Be the electromagnetic free space wavelength of centre frequency, its single resonant cavity unit be positioned at wherein feed (1) and can constitute the high gain sector antenna that a wave beam can have a down dip and be convenient to use to realize the covering of communicating by letter of certain sector separately.
2. the downwards bevel beam high gain sector antenna unit that can be used for the base station according to claim 1, it is characterized in that: described circular arc shaped portion reflecting surface (41) is by a plurality of common formations of circular arc metal band (411) and the air gap (412) between the two circular arc metal bands (411) along the axis direction width gradual change, the width of above-mentioned circular arc metal band (411) is 0.01～0.03 times of free space wavelength of design center frequency, and the width of air gap (412) is 0.005～0.01 times of free space wavelength of design center frequency.
3. the downwards bevel beam high gain sector antenna unit that can be used for the base station according to claim 1 is characterized in that: described feed (1) is made of half-wave dipole or its modification structures.
4. integral antenna based on the downwards bevel beam high gain sector antenna unit that can be used for the base station, comprise feed (1) resonant cavity (2) two parts, it is characterized in that resonant cavity (2) is by cylindrical grounding plate (3), and with coaxial a plurality of of cylindrical grounding plate (3) along partial reflection surface (4) that the circular ring metal band (42) of axis direction width gradual change combines common formation, being provided with the rectangular reflection plate (5) that links to each other with above-mentioned cylindrical grounding plate (3) in described resonant cavity (2), is fan-shaped thereby resonant cavity is divided into a plurality of cross sections, the resonant cavity unit that both ends of the surface are open; Feed (1) lays respectively in described each resonant cavity unit, and the feed number is identical with the resonant cavity unit number; Distance between the outer surface of cylindrical grounding plate (3) and partial reflection surface (4) satisfies d = ( 1 2 + n ) λ 0 , N=0,1,2..., wherein λ 0Be the electromagnetic free space wavelength of centre frequency.
5. the integral antenna based on the downwards bevel beam high gain sector antenna unit that can be used for the base station according to claim 4 is characterized in that: described partial reflection surface (4) a plurality ofly is made up of along the circular ring metal band (42) of axis direction width gradual change and the air gap (43) between the circular ring metal band (42) described.
6. the integral antenna based on the downwards bevel beam high gain sector antenna unit that can be used for the base station according to claim 4 is characterized in that: described feed (1) is made of half-wave dipole or its modification structures.
7. the integral antenna based on the downwards bevel beam high gain sector antenna unit that can be used for the base station according to claim 4, it is characterized in that: described circular ring metal band (42) width is for being 0.01～0.03 times of the free space wavelength of design center frequency, and the width of air gap (43) is 0.005～0.01 times of free space wavelength of design center frequency.
CN2009202559429U 2009-11-27 2009-11-27 Downtilt beam high-gain sector antenna unit and integral antenna usable in base stations Expired - Fee Related CN201584501U (en)

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Application Number Priority Date Filing Date Title
CN2009202559429U CN201584501U (en) 2009-11-27 2009-11-27 Downtilt beam high-gain sector antenna unit and integral antenna usable in base stations

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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101707286A (en) * 2009-11-27 2010-05-12 东南大学 High-gain section antenna unit with declinational wave beam and integrated antenna thereof
CN103348537A (en) * 2011-12-29 2013-10-09 昆特里尔资产股份有限公司 Universal device for energy concentration

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101707286A (en) * 2009-11-27 2010-05-12 东南大学 High-gain section antenna unit with declinational wave beam and integrated antenna thereof
CN103348537A (en) * 2011-12-29 2013-10-09 昆特里尔资产股份有限公司 Universal device for energy concentration

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C17 Cessation of patent right
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Granted publication date: 20100915

Termination date: 20131127