CN101707291A - Broadband dual polarized antenna unit - Google Patents
Broadband dual polarized antenna unit Download PDFInfo
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- CN101707291A CN101707291A CN200910246594A CN200910246594A CN101707291A CN 101707291 A CN101707291 A CN 101707291A CN 200910246594 A CN200910246594 A CN 200910246594A CN 200910246594 A CN200910246594 A CN 200910246594A CN 101707291 A CN101707291 A CN 101707291A
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Abstract
The invention discloses a broadband dual polarized antenna unit, which comprises a radiator and a balanced feeding device, wherein the radiator consists of four radiation fins which are symmetric in pairs and are orthogonally distributed; the balanced feeding device consists of an excitation core wire and a balanced balun; the balanced balun is simultaneously formed into a support of each radiation fin; a symmetric radiation array is as long as a half of wavelength and is as wide as a quarter of the wavelength; each radiation fin further comprises a supporting area and a radiation area which are mutually adjacent; the two short sides and long sides of the radiation area and the two waists of the supporting area form a continuous curve; the ratio of the waist length of the supporting area to the length of the short side of the radiation area to the length of the long side of the radiation area is 1:1:2; and the two waists of each of the two adjacent radiation fins are arranged in parallel and are at an interval less than 0.1 wavelengths. The dual polarized antenna unit is a radiation oscillator which is relatively wider than the broadband and has good indexes, such as a standing-wave ratio and the like in a relatively wider bandwidth.
Description
[technical field]
The present invention relates to the antenna of mobile communication base station field, particularly a kind of wideband dual polarized antenna.
[technical background]
Mobile communication is being brought into play more and more important effect in daily life.By the end of the year 2007, China's tracking exchage amount surpasses 5.4 hundred million, and the antenna for base station that comes into operation surpasses 1,000,000 pairs, and along with the continuous increase of mobile communication business and kind, the working frequency range of various standards is also in continuous expansion.The operating frequency of smart antenna is 1880-1920MHz in the TD-SCDMA network, 2010-2025MHz, 2300-2400MHz.The communication frequency of DCS is 1710-1880MHz.The communication frequency of PCS is 1850-1990MHz.The communication frequency of UMTS is 1920-2170MHz.The part communications band of WiMax (WorldwideInteroperability for Microwave Access, promptly worldwide interoperability for microwave inserts) is 2300-2700MHz.Therefore, now proposed to design a market demand of taking into account the broad-band antenna of above-mentioned standard.
The relative band width of 1710-2400MHz surpasses 33%, and the relative band width of 1710-2700MHz is then near 45%, and the relative bandwidth that existing dual-polarized antenna vibrator provides generally all is difficult to satisfy, and the bandwidth of the antenna array of Zu Chenging also is restricted thus.Seldom having relative bandwidth to surpass 45% in the design of existing broadband oscillator, is described broadband oscillators such as ZL200820122837.3, CN 201174423Y, CN 101465475A as the patent No., and its relative bandwidth just has only about 33%.
[summary of the invention]
The objective of the invention is to: a kind of radiating doublet of relative bandwidth broad is provided, and it is good that this oscillator index such as compares at the frequency band standing internal wave of broad.
The object of the present invention is achieved like this:
A kind of dual polarized antenna unit of broadband, comprise radiant body and balance feeder equipment, this balanced feeding device is the excitation radiation body to the radiant body feed, this radiant body is made up of four radiation fins, described four radiation fins are symmetry and omnidirectional distribution in twos, form the symmetrical radiating curtain of two pairs of quadratures, this balanced feeding device is made up of excitation heart yearn and balance Ba Lun two parts, this balance Ba Lun constitutes the supporter of each radiation fin simultaneously, described symmetrical radiating curtain length is about 1/2nd wavelength, width is about quarter-wave, this radiation fin further comprises a Support and a radiation area that adjoins mutually, this Support is the isosceles trapezoid shape, this Support is positioned at the middle part of this radiant body, and be connected with supporter, this radiation area is positioned at the periphery of this radiant body, the periphery of this radiation area has a long limit and is respectively in the two isometric minor faces of these both sides, length limit, described two minor faces are connected with an end of Support two waists respectively away from an end on long limit, two waists of two minor faces of this radiation area and long limit and Support are formed full curve, proportionate relationship between the long edge lengths of the waist length of described Support and the bond length of radiation area and radiation area is about 1: 1: 2, the adjacent two adjacent waists of two radiation fins in the described left and right sides be arranged in parallel, and the gap between two waists is less than 0.1 wavelength.
The excitation heart yearn coupling feed of above-mentioned Compositional balance feeder equipment.
Above-mentioned balance Ba Lun is the column of hollow, and this excitation heart yearn inserts this balance Ba Lun inside, and this excitation heart yearn and this balance Ba Lun constitute a pair of microstrip transmission line, and the feed end and the feeding network of array antennas of described excitation heart yearn link.
Above-mentioned excitation heart yearn is " n " type, and the inside of balance Ba Lun is inserted at two ends, and isolates with this balance Ba Lun.
The part that above-mentioned excitation heart yearn inserts balance Ba Lun is provided with the plurality of fixed piece, and this plurality of fixed piece is fastened among this balance Ba Lun, and this excitation heart yearn passes from this plurality of fixed piece middle part.
Above-mentioned fixed block is located at the top of feed end and this balance Ba Lun of this excitation heart yearn.
Above-mentioned balance Ba Lun is the square column of hollow, and it highly is 1/4th wavelength, and wall thickness is 1mm, and this supporter is perpendicular to this radiation fin, and this supporter and this radiation fin are designed to one on physical structure.
The above-mentioned radiation fin and the joint portion of supporter are provided with some reinforcements.
Above-mentioned radiation fin can be an entity structure, also can be engraved structure.
If above-mentioned broadband dual polarized antenna unit is provided with reflecting plate, then described balance Ba Lun is fixed on the reflecting plate.
Its beneficial effect is: the horizontal beam width that the present invention has overcome antenna oscillator in the existing broadband dual polarized antenna technology changes greatly with the difference of frequency, the gain of antenna oscillator is relatively low, and cross polarization is generally not good, current imbalance between antenna, and assembling trouble, defectives such as consistency difference provide a kind of wideband dual polarized oscillator of integrated design, and it is simple in structure, easy for installation, easy feed, high conformity is easy to produce; Relative bandwidth surpasses 45%, and good in indexs such as the frequency band standing internal wave of broad compare.And have that the fluctuation of good cross polarization characteristics, horizontal plane beamwidth is little, high-gain and high before and after advantage such as compare.
[description of drawings]
Fig. 1 is the overall structure schematic diagram of the embodiment of the invention 1;
Fig. 2 is the overall structure profile of the embodiment of the invention 1;
Fig. 3 is the structural representation of the embodiment of the invention 1 radiant body;
Fig. 4 is the structural representation of the embodiment of the invention 1 one of them radiation fin;
Fig. 5 is the structural representation of the embodiment of the invention 2;
Fig. 6 is the structural representation of the embodiment of the invention 3;
Fig. 7 is the structural representation of the embodiment of the invention 4;
Fig. 8 is the present invention+45 ° polarizing voltage standing-wave ratio frequency characteristic curve diagrams;
Fig. 9 is the present invention-45 ° polarizing voltage standing-wave ratio frequency characteristic curve diagram.
[embodiment]
Below in conjunction with drawings and the specific embodiments, the present invention is described in more detail.
Embodiment 1:
As shown in Figure 1, the broadband dual polarized antenna of present embodiment comprises reflecting plate 1,2, four radiation fins 3 of supporter, fixed block 4 and excitation heart yearn 5.These four radiation fins 3 are symmetry and quadrature in twos, forms the radiant body of present embodiment.
Reflecting plate 1 is a metallic plate, the effect of playing reflection electromagnetic wave and installing and fixing, and its thickness can be ignored with respect to operation wavelength.
As shown in Figure 4, radiation fin 3 further comprises the Support 3-1 that is the isosceles trapezoid shape and is the radiation area 3-2 of quadrangle shape, this Support 3-1 is positioned at the middle part of this radiant body, and supported by this supporter 2, this radiation area 3-2 is positioned at the periphery of this radiant body, this be the isosceles trapezoid shape Support 3-1 the long a of waist and be the wide b of radiation area 3-2 of quadrangle shape and the proportionate relationship of long c is about 1: 1: 2, as shown in Figure 3, four radiation fins are symmetry and omnidirectional distribution in twos, and the gap between two adjacent radiation fins is less than 0.1 wavelength.Two broadsides of this radiation area 3-2 are formed full curve with two waists of long limit and Support 3-1, and adjacent two radiation fins, the 3 two adjacent waists in the left and right sides be arranged in parallel, and the gap between two waists is less than 0.1 wavelength.
The radiation area of the present embodiment shape that is rectangle, but not only be confined to this, also can be the quadrangle of other shapes.
Because excitation heart yearn 5 is not connected with radiation fin 3 with supporter 2 in the present embodiment, in order to make excitation heart yearn 5 be fixed on the inside of supporter 2 preferably, adopt Shooting Technique in the present embodiment, fixed block 4 edges that excitation heart yearn 5 and insulating material are made are one, as shown in Figure 1, fixed block 4 cards are established in this supporter 2, and this excitation heart yearn 5 passes from fixed block 4 middle parts, and present embodiment respectively is provided with a fixed block 4 at the feed end of excitation heart yearn 5 and the top of supporter 2.
In the present embodiment, an example that the broad-band antenna oscillator is surveyed is provided, and the thickness of the aluminium alloy reflecting plate 1 of employing is about 1.5mm, and length and width are about 200mm * 150mm, the height of the supporter 2 that adopts is about 35mm, being about of half-wave dipole is 70mm, the wide 30mm that is about, wherein a among Fig. 3, b, the c limit is about 15mm, 15mm, 30mm.This oscillator is placed microwave dark room, use network analyzer that oscillator is surveyed, resulting voltage standing wave(VSW) is such as Fig. 8 and shown in Figure 9, and as seen from the figure, in VSWR≤1.4 o'clock, impedance bandwidth surpasses 45%.
Embodiment 2:
As shown in Figure 5, the difference of present embodiment and embodiment 1 is: the radiation fin 3 of embodiment 1 is entities, and present embodiment adopts engraved structure.
Embodiment 3:
As shown in Figure 6, similar to embodiment 2, the radiation fin of present embodiment adopts another kind of engraved structure.
Embodiment 4:
As shown in Figure 7, the radiation fin of present embodiment adopts the engraved structure that is different from embodiment 2 and embodiment 3.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies, then the present invention also is intended to comprise these changes and modification interior.The radiation fin of this patent, it both can be an entity, also can hollow out, as figure (4), give the scheme of three kinds of radiation fin hollow outs in this patent, but it is not limited to this three kinds of schemes.
Claims (10)
1. the dual polarized antenna unit in a broadband, comprise radiant body and balance feeder equipment, this balanced feeding device is the excitation radiation body to the radiant body feed, this radiant body is made up of four radiation fins, described four radiation fins are symmetry and omnidirectional distribution in twos, forms the symmetrical radiating curtain of two pairs of quadratures, and this balanced feeding device is made up of excitation heart yearn and balance Ba Lun two parts, this balance Ba Lun constitutes the supporter of each radiation fin simultaneously, it is characterized in that:
Described symmetrical radiating curtain length is about 1/2nd wavelength, width is about quarter-wave, this radiation fin further comprises a Support and a radiation area that adjoins mutually, this Support is the isosceles trapezoid shape, this Support is positioned at the middle part of this radiant body, and be connected with supporter, this radiation area is positioned at the periphery of this radiant body, the periphery of this radiation area has a long limit and is respectively in the two isometric minor faces of these both sides, length limit, described two minor faces are connected with an end of Support two waists respectively away from an end on long limit, two waists of two minor faces of this radiation area and long limit and Support are formed full curve, proportionate relationship between the long edge lengths of the waist length of described Support and the bond length of radiation area and radiation area is about 1: 1: 2, the adjacent two adjacent waists of two radiation fins in the described left and right sides be arranged in parallel, and the gap between two waists is less than 0.1 wavelength.
2. the dual polarized antenna unit in a kind of broadband according to claim 1 is characterized in that: the excitation heart yearn coupling feed of described Compositional balance feeder equipment.
3. the dual polarized antenna unit in a kind of broadband according to claim 2, it is characterized in that: described balance Ba Lun is the column of hollow, this excitation heart yearn inserts this balance Ba Lun inside, this excitation heart yearn and this balance Ba Lun constitute a pair of microstrip transmission line, and the feed end and the feeding network of array antennas of described excitation heart yearn link.
4. the dual polarized antenna unit in a kind of broadband according to claim 3, it is characterized in that: described excitation heart yearn is " n " type, and the inside of balance Ba Lun is inserted at two ends, and isolates with this balance Ba Lun.
5. the dual polarized antenna unit in a kind of broadband according to claim 4, it is characterized in that: the part that described excitation heart yearn inserts balance Ba Lun is provided with the plurality of fixed piece, this plurality of fixed piece is fastened among this balance Ba Lun, and this excitation heart yearn passes from this plurality of fixed piece middle part.
6. the dual polarized antenna unit in a kind of broadband according to claim 5, it is characterized in that: described fixed block is located at the top of feed end and this balance Ba Lun of this excitation heart yearn.
7. according to the dual polarized antenna unit in each described a kind of broadband of claim 1-6, it is characterized in that: described balance Ba Lun is the square column of hollow, it highly is 1/4th wavelength, wall thickness is 1mm, this supporter is perpendicular to this radiation fin, and this supporter and this radiation fin are designed to one on physical structure.
8. the dual polarized antenna unit in a kind of broadband according to claim 7, it is characterized in that: the joint portion of described radiation fin and supporter is provided with some reinforcements.
9. according to the dual polarized antenna unit in each described a kind of broadband of claim 1-6, it is characterized in that: described radiation fin can be an entity structure, also can be engraved structure.
10. according to the dual polarized antenna unit in each described a kind of broadband of claim 1-6, it is characterized in that: if described broadband dual polarized antenna unit is provided with reflecting plate, then described balance Ba Lun is fixed on the reflecting plate.
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| CN200910246594A CN101707291B (en) | 2009-11-26 | 2009-11-26 | Broadband dual polarized antenna unit |
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|---|---|---|---|
| CN200910246594A CN101707291B (en) | 2009-11-26 | 2009-11-26 | Broadband dual polarized antenna unit |
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| CN101707291A true CN101707291A (en) | 2010-05-12 |
| CN101707291B CN101707291B (en) | 2012-10-24 |
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| CN200910246594A Active CN101707291B (en) | 2009-11-26 | 2009-11-26 | Broadband dual polarized antenna unit |
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| CN102074779A (en) * | 2010-12-03 | 2011-05-25 | 广东通宇通讯股份有限公司 | Broadband dual-polarized antenna unit |
| CN102110875A (en) * | 2010-12-21 | 2011-06-29 | 东莞市晖速天线技术有限公司 | Mobile communication base station and wideband dual-polarization vibrator thereof |
| CN102157783A (en) * | 2011-03-17 | 2011-08-17 | 京信通信系统（中国）有限公司 | Dual-polarized broadband radiation unit and array antenna |
| CN102496777A (en) * | 2011-12-22 | 2012-06-13 | 广州杰赛科技股份有限公司 | Broadband dual polarization radiation unit |
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| CN112582774A (en) * | 2019-09-30 | 2021-03-30 | 京信通信技术(广州)有限公司 | Antenna, radiating element thereof, balun structure of radiating element and manufacturing method |
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