CN104092007A - Broadband circular polarization omni antenna based on tilting oscillators - Google Patents
Broadband circular polarization omni antenna based on tilting oscillators Download PDFInfo
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- CN104092007A CN104092007A CN201410301418.6A CN201410301418A CN104092007A CN 104092007 A CN104092007 A CN 104092007A CN 201410301418 A CN201410301418 A CN 201410301418A CN 104092007 A CN104092007 A CN 104092007A
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Abstract
The invention discloses a broadband circular polarization omni antenna based on tilting oscillators. The broadband circular polarization omni antenna comprises an antenna radiation part, a flexible dielectric board, a broadband feed network and a feed substrate. The antenna radiation part comprises four tilting oscillators, each tilting oscillator is composed of a main radiation oscillator and a parasitic oscillator, and the lengths and the tilting angles of the main radiation oscillators and the parasitic oscillators are different. The flexible dielectric board is bent to be in a hollow cylinder shape, and the four tilting oscillators are arrayed on the flexible dielectric board in an equant even ring shape. The broadband feed network is printed on the front face and the rear face of the feed substrate, and the broadband feed network is horizontally placed at the center of a medium hollow cylinder to achieve equiamplitude same-phase feed on the four tilting oscillators. The broadband circular polarization omni antenna based on the tilting oscillators has the advantages that left and right rotating circular polarization is achieved flexibly, the omnidirectional performance is good, and the broadband is wide, and is suitable for the field of mobile communication base stations.
Description
Technical field
The present invention relates to a kind of wireless communication field, be specifically related to a kind of broadband circle polarized omnidirectional antenna based on inclination oscillator.
Background technology
Along with social development, performance requirement to antenna is also more and more higher, in modern wireless application system, simple linear polarized antenna has been difficult to meet people's demand, circular polarized antenna is more and more subject to paying close attention to more widely, and omnidirectional circular-polarized antenna is especially because its special performance is widely used at aspects such as communication, remote sensing remote measurement, radar, electronic reconnaissance and electronic jamming.
In antenna theory, electric dipole radiation omnidirectional vertically polarized wave perpendicular to ground, the uniform current ring radiation omnidirectional horizontal polarized wave that is parallel to ground, vertical, the horizontal polarization electric field of both radiation produce 90 ° of phase differences naturally, when its amplitude equates, in far field, stack can produce Circular polarized omni-directional ripple to pairwise orthogonal polarized wave, thereby realizes Circular polarized omni-directional radiation.When using inclination oscillator battle array to realize omnidirectional circular-polarized antenna, each inclination oscillator can be decomposed into a horizontal component and a vertical component, when a plurality of inclination oscillators are during around circumferential arrangement, its horizontal component can be equivalent to a horizontal uniform current ring, vertical component is equivalent to a vertical dipole, and both produce Circular polarized omni-directional ripple in far field.The omnidirectional antenna that method realizes thus can be realized wider circular polarization bandwidth, but the more difficult realization of impedance matching.
Summary of the invention
In order to overcome the shortcoming and deficiency of prior art existence, the invention provides the broadband circle polarized omnidirectional antenna based on inclination oscillator of a kind of low section, wide bandwidth and horizontal plane omnidirectional radiation.
The present invention adopts following technical scheme:
A kind of broadband circle polarized omnidirectional antenna based on inclination oscillator, comprise aerial radiation part, flexible media plate, broadband feeding network and feed substrate, described broadband feeding network is printed on the tow sides of feed substrate, described flexible media plate bends to hollow cylinder, described feed substrate is placed horizontally at the center of hollow cylinder, described aerial radiation partly comprises four inclination oscillators, and described four inclination oscillators are the even annular arrangement of decile at hollow cylinder outer surface.
Described inclination oscillator consists of primary radiation oscillator and parasitic oscillator, primary radiation oscillator and horizontal plane positive direction angle are 0< α <180 °, and described parasitic oscillator and horizontal plane positive direction angle are 0< β <180 °.
The diameter of described hollow cylinder is 0.17 λ
0～0.2 λ
0, be highly 0.4 λ
0, λ wherein
0centered by frequency 2GHz the wavelength of corresponding free space.
The width of described primary radiation oscillator and parasitic oscillator is respectively 0.05 λ
0with 0.02 λ
0, length is respectively 0.47 λ
0with 0.31 λ
0.
Described primary radiation oscillator and parasitic oscillator be without direct connection, wherein, and distance d in primary radiation oscillator peak and parasitic oscillator peak vertical direction
10.1 λ
0, distance d in horizontal direction
20.05 λ
0.
Described primary radiation oscillator is in disconnection crack, the centre position of length direction, and this crack is connected with broadband feeding network by solder joint.
Broadband feeding network comprises four wideband baluns and impedance matching circuit, each wideband balun consists of the gap at feed substrate back and the positive L-type microstrip line with 45 ° of chamferings, the terminal open circuit of L-type microstrip line, the other end is connected with impedance matching circuit one end, and the other end of impedance matching circuit is connected with the centre feed point of hollow cylinder.
Described feed substrate back is also printed with the cross conductor patch with 45 ° of chamferings.
Described impedance matching networking is decussation in feed substrate center and connects.
When the angle of inclination oscillator and horizontal plane positive direction is <90 ° of 0< α, form right-handed circular polarization omnidirectional antenna, when the angle of inclination oscillator and horizontal plane positive direction is <180 ° of 90 ° of < α, form left-hand circular polarization omnidirectional antenna.
Beneficial effect of the present invention:
(1) four inclination oscillators that the present invention adopts have been realized Circular polarized omni-directional radiation around the even annular arrangement of hollow cylinder decile, utilize parasitic oscillator and broadband feeding network, have realized broadband circle polarized;
(2) the polarization rotation direction of circular polarization omnidirectional antenna is determined by the tilt angle alpha of tilt oscillator and horizontal plane positive direction, when the angle of inclination oscillator and horizontal plane positive direction is <90 ° of 0< α, form right-handed circular polarization omnidirectional antenna, and the angle of inclination oscillator and horizontal plane positive direction is while being <180 ° of 90 ° of < α, form left-hand circular polarization omnidirectional antenna, conversion regime is flexible;
(3) each inclination oscillator comprises a primary radiation oscillator and a parasitic oscillator, they are all around the even annular arrangement of hollow cylinder decile, primary radiation oscillator angle of inclination and cylindrical radius are to realize the key of Circular polarized omni-directional radiation, utilize the beamwidth of antenna that has been coupled broadening between parasitic oscillator and primary radiation oscillator, thereby realize broadband circle polarized characteristic;
(4) broadband feeding network only affects antenna impedance performance, on antenna circular polarization and omnidirectional's characteristic almost without impact; Broadband feeding network is to four inclination oscillator constant amplitude homophase feeds, realized wideband impedance match, the return loss bandwidth of the 10dB of this circular polarization omnidirectional antenna can reach 61% (1.35-2.54GHz), 3dB axial ratio bandwidth is 44% (1.69-2.64GHz), in 1.7-2.4GHz frequency range, horizontal radiation pattern deviation in roundness is less than 1.5dB, and be less than-15dB of cross polarization, easily realizes double-circle polarization function.
Accompanying drawing explanation
Fig. 1 is a kind of broadband circle polarized omnidirectional antenna structural representation based on inclination oscillator of the present invention;
Fig. 2 is the inclination oscillator structure schematic diagram in Fig. 1;
Fig. 3 is feeding network structural representation in broadband in Fig. 1;
Fig. 4 (a) is simulation result and the test result comparison diagram of embodiment of the present invention return loss, and Fig. 4 (b) is simulation result and the test result comparison diagram of embodiment of the present invention axial ratio.
Shown in figure:
1-aerial radiation part; 2-flexible media plate; 3-broadband feeding network; 4-feed substrate; 5-primary radiation oscillator; The parasitic oscillator of 6-; 7-solder joint; 8-centre feed point; 9-gap; 10-L type microstrip line; 11-impedance matching circuit; The cross conductor patch of 12-.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
Embodiment
As shown in Figure 1, a kind of broadband circle polarized omnidirectional antenna based on inclination oscillator, comprise aerial radiation part 1, flexible media plate 2, broadband feeding network 3 and feed substrate 4, described broadband feeding network 3 is printed on the positive and negative two sides of feed substrate 4, described flexible media plate 2 bends to hollow cylinder, and the diameter of described hollow cylinder is 0.17 λ
0～0.2 λ
0, be highly 0.4 λ
0, λ wherein
0centered by frequency 2GHz the wavelength of corresponding free space, described feed substrate 4 is placed horizontally at the center of hollow cylinder, and the diameter of feed substrate and hollow cylinder equal diameters, described aerial radiation part 1 comprises four inclination oscillators, and described four inclination oscillators are the even annular arrangement of decile at hollow cylinder outer surface.
As shown in Figure 2, each inclination oscillator consists of a primary radiation oscillator 5 and a parasitic oscillator 6, the length k of primary radiation oscillator in the present embodiment
1for 73mm, width h
1be 7.5mm, α is 35 ° with horizontal plane positive direction angle, the length k of parasitic oscillator
2for 47mm, width h
2be 3mm, β is 40 ° with horizontal plane positive direction angle.Described primary radiation oscillator and parasitic oscillator be without direct connection, wherein, and distance d in primary radiation oscillator peak and parasitic oscillator peak vertical direction
114.8mm, distance d in horizontal direction
27.3mm.Primary radiation oscillator is in disconnection crack, the centre position of length direction, and described fracture width is 1.2mm, and this crack is connected with broadband feeding network 3 by solder joint 7.
The flexible media plate thickness of the present embodiment is 0.05mm high frequency plate Panasonic R-F775 sheet material, relative dielectric constant 3.2, and loss angle tangent is 0.0015, diameter is 0.185 λ
0, be highly 0.4 λ
0, λ wherein
0centered by frequency 2GHz the wavelength of corresponding free space.
Feed substrate 4 is that thickness is 0.8mm dielectric-slab Taconic TLY-5 sheet material, relative dielectric constant 2.2, and loss angle tangent is 0.0009, diameter is 27.95mm.
Coaxial line adopts flexible coaxial line Johnson/Emerson RG-178, and diameter is 2.5mm, and characteristic impedance is 50 Ω.
As shown in Figure 3, described feed substrate is placed horizontally at the center of the hollow cylinder of flexible media plate bending, broadband feeding network 3 is just being printed on substrate, on anti-two sides, broadband feeding network comprises four wideband baluns and impedance matching circuit 11, wideband balun consists of the gap 9 at feed substrate back and the positive L-type microstrip line 10 with 45 degree chamferings, the terminal open circuit of L-type microstrip line, the other end is connected with impedance matching circuit 11, the other end of impedance matching circuit is connected on the centre feed point 8 of cylinder, receive on feed 50 Ω coaxial lines used, feed substrate back is also printed with the cross conductor patch 12 with chamfering, the chamfer angle of conductor patch is 45 °, the first paragraph partial-length l of chamfering
8for 2mm, the second portion length l of chamfering
9also be 2mm, on paster etching gap, paster width w
g12mm.
Broadband feeding network can be realized four inclination oscillator constant amplitude homophase feeds, and wherein parameter declaration is as follows: l
sthat gap length is 19mm, w
sthat gap width is 1.2mm, l
1the length that is impedance matching network first paragraph is 4mm, l
2the length that is impedance matching network second segment part is 23.5mm, l
3that the 3rd section of partial-length of impedance matching network is 3mm, w
1the width that is impedance matching network first and second and three sections is 0.4mm, l
4be that microstrip line length with chamfering is 4mm, chamfer angle is also 45 °, l
5that microstrip line chamfering first paragraph partial-length is 1.5mm, l
6that microstrip line chamfering second segment partial-length is 1.5mm, l
7that bending part length with the microstrip line of chamfering is 15.5mm, w
2that band chamfering micro belt line width is 1.5mm.
The solder joint length w that inclination oscillator is connected with broadband feeding network
f1.5mm, the distance length h that solder joint 7 is connected with cross conductor patch 12
f2.5mm.
Impedance matching circuit is decussation in feed substrate center and connects.When the angle of inclination oscillator and horizontal plane positive direction is <90 ° of 0< α, form right-handed circular polarization omnidirectional antenna, and the angle of inclination oscillator and horizontal plane positive direction is while being <180 ° of 90 ° of < α, form left-hand circular polarization omnidirectional antenna, conversion method is simple, flexible.
As Fig. 4 (a), the antenna of the present embodiment shown in Fig. 4 (b) passes through broadband feeding network to four inclination oscillator constant amplitude homophase feeds, realized wideband impedance match, the return loss bandwidth of the 10dB of this circular polarization omnidirectional antenna can reach 61% (1.35-2.54GHz), 3dB axial ratio bandwidth is 44% (1.69-2.64GHz), and in 1.7-2.4GHz frequency range, horizontal radiation pattern deviation in roundness is less than 1.5dB, be less than-15dB of cross polarization, easily realizes double-circle polarization function.
The invention provides and a kind ofly utilize a plurality of inclination oscillators to carry out the mode of permutation and combination, by the inclination oscillator of same Unit four is conformal in hollow cylinder surface, stack has produced Circular polarized omni-directional ripple principle in far field to make each antenna element, by the design of parasitic element and broadband feeding network, finally realize broadband circle polarized omnidirectional radiation again.
Utilize this invention also can carry out antenna array, form multiple unit horizontally polarized omnidirectional antenna array, improve antenna gain, thereby meet the demand of antenna of mobile communication base station high-gain.
Above-described embodiment is preferably execution mode of the present invention; but embodiments of the present invention are not limited by the examples; other any do not deviate from change, the modification done under Spirit Essence of the present invention and principle, substitutes, combination, simplify; all should be equivalent substitute mode, within being included in protection scope of the present invention.
Claims (10)
1. the broadband circle polarized omnidirectional antenna based on inclination oscillator, comprise aerial radiation part, flexible media plate, broadband feeding network and feed substrate, described broadband feeding network is printed on the positive and negative two sides of feed substrate, it is characterized in that, described flexible media plate bends to hollow cylinder, described feed substrate is placed horizontally at the center of hollow cylinder, and described aerial radiation partly comprises four inclination oscillators, and described four inclination oscillators are the even annular arrangement of decile at hollow cylinder outer surface.
2. a kind of broadband circle polarized omnidirectional antenna based on inclination oscillator according to claim 1, it is characterized in that, described inclination oscillator consists of primary radiation oscillator and parasitic oscillator, primary radiation oscillator and horizontal plane positive direction angle are 0< α <180 °, and described parasitic oscillator and horizontal plane positive direction angle are 0< β <180 °.
3. a kind of broadband circle polarized omnidirectional antenna based on inclination oscillator according to claim 1, is characterized in that, the diameter of described hollow cylinder is 0.17 λ
0～0.2 λ
0, be highly 0.4 λ
0, λ wherein
0centered by frequency 2GHz the wavelength of corresponding free space.
4. a kind of broadband circle polarized omnidirectional antenna based on inclination oscillator according to claim 2, is characterized in that, the width of described primary radiation oscillator and parasitic oscillator is respectively 0.05 λ
0with 0.02 λ
0, length is respectively 0.47 λ
0with 0.31 λ
0.
5. a kind of broadband circle polarized omnidirectional antenna based on inclination oscillator according to claim 4, is characterized in that, described primary radiation oscillator and parasitic oscillator be without direct connection, wherein, and distance d in primary radiation oscillator peak and parasitic oscillator peak vertical direction
10.1 λ
0, distance d in horizontal direction
20.05 λ
0.
6. a kind of broadband circle polarized omnidirectional antenna based on inclination oscillator according to claim 5, is characterized in that, described primary radiation oscillator is in disconnection crack, the centre position of length direction, and this crack is connected with broadband feeding network by solder joint.
7. a kind of broadband circle polarized omnidirectional antenna based on inclination oscillator according to claim 1, it is characterized in that, described broadband feeding network comprises four wideband baluns and impedance matching circuit, each wideband balun consists of gap and the positive L-type microstrip line with 45 ° of chamferings of feed substrate back, the terminal open circuit of L-type microstrip line, the other end is connected with impedance matching circuit one end, and the other end of impedance matching circuit is connected with the centre feed point of hollow cylinder.
8. a kind of broadband circle polarized omnidirectional antenna based on inclination oscillator according to claim 1, is characterized in that, described feed substrate back is also printed with the cross conductor patch with 45o chamfering.
9. a kind of broadband circle polarized omnidirectional antenna based on inclination oscillator according to claim 7, is characterized in that, described impedance matching networking is decussation in feed substrate center and connects.
10. according to the antenna described in claim 1-9 any one, it is characterized in that, when the angle of inclination oscillator and horizontal plane positive direction is <90 ° of 0< α, form right-handed circular polarization omnidirectional antenna, when the angle of inclination oscillator and horizontal plane positive direction is <180 ° of 90 ° of < α, form left-hand circular polarization omnidirectional antenna.
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| CN201410301418.6A CN104092007A (en) | 2014-06-27 | 2014-06-27 | Broadband circular polarization omni antenna based on tilting oscillators |
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Cited By (13)
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| WO2017197975A1 (en) * | 2016-05-20 | 2017-11-23 | 中兴通讯股份有限公司 | Antenna and terminal device |
| CN108023179A (en) * | 2018-01-02 | 2018-05-11 | 华南理工大学 | A kind of aqueous medium paster antenna of frequency reconfigurable |
| CN108521835A (en) * | 2017-12-18 | 2018-09-11 | 深圳市大疆创新科技有限公司 | The circular polarized antenna component of unmanned plane and unmanned plane |
| CN109417223A (en) * | 2017-09-08 | 2019-03-01 | 深圳市大疆创新科技有限公司 | Circular polarisation dual-band antenna |
| CN109950707A (en) * | 2019-04-15 | 2019-06-28 | 西安电子科技大学 | A kind of taper conformal endfire array antenna |
| CN110676567A (en) * | 2019-10-29 | 2020-01-10 | 合肥职业技术学院 | Double-circular-polarization patch array antenna based on broadband balun feed |
| CN110809836A (en) * | 2018-10-31 | 2020-02-18 | 深圳市大疆创新科技有限公司 | Circularly polarized antenna |
| JP2020508624A (en) * | 2017-02-28 | 2020-03-19 | ケーエムダブリュ・インコーポレーテッド | Dual polarization omni antenna and base station including the same |
| CN111653870A (en) * | 2020-07-06 | 2020-09-11 | 重庆金美通信有限责任公司 | Circularly polarized omnidirectional antenna |
| CN111710973A (en) * | 2020-07-08 | 2020-09-25 | 哈尔滨众达电子有限公司 | Stacked differential broadband base station antenna |
| CN113690630A (en) * | 2021-07-07 | 2021-11-23 | 华南理工大学 | All-round face covers circular polarization multi-beam antenna based on dielectric polarizer |
| CN113851819A (en) * | 2021-10-15 | 2021-12-28 | 电子科技大学 | Broadband omnidirectional circularly polarized antenna based on curve dipole |
| CN114843751A (en) * | 2022-04-24 | 2022-08-02 | 西安矩阵无线科技有限公司 | Broadband omnidirectional circularly polarized antenna |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2017197975A1 (en) * | 2016-05-20 | 2017-11-23 | 中兴通讯股份有限公司 | Antenna and terminal device |
| US11114772B2 (en) | 2017-02-28 | 2021-09-07 | Kmw Inc. | Dual polarized omni-directional antenna and base station including same |
| JP2020508624A (en) * | 2017-02-28 | 2020-03-19 | ケーエムダブリュ・インコーポレーテッド | Dual polarization omni antenna and base station including the same |
| CN109417223B (en) * | 2017-09-08 | 2022-01-14 | 深圳市大疆创新科技有限公司 | Circularly polarized dual-band antenna |
| CN109417223A (en) * | 2017-09-08 | 2019-03-01 | 深圳市大疆创新科技有限公司 | Circular polarisation dual-band antenna |
| WO2019119237A1 (en) * | 2017-12-18 | 2019-06-27 | 深圳市大疆创新科技有限公司 | Unmanned aerial vehicle and circularly polarized antenna assembly thereof |
| CN108521835A (en) * | 2017-12-18 | 2018-09-11 | 深圳市大疆创新科技有限公司 | The circular polarized antenna component of unmanned plane and unmanned plane |
| CN108023179A (en) * | 2018-01-02 | 2018-05-11 | 华南理工大学 | A kind of aqueous medium paster antenna of frequency reconfigurable |
| CN110809836A (en) * | 2018-10-31 | 2020-02-18 | 深圳市大疆创新科技有限公司 | Circularly polarized antenna |
| CN109950707B (en) * | 2019-04-15 | 2020-09-04 | 西安电子科技大学 | Conical conformal end-fire array antenna |
| CN109950707A (en) * | 2019-04-15 | 2019-06-28 | 西安电子科技大学 | A kind of taper conformal endfire array antenna |
| CN110676567A (en) * | 2019-10-29 | 2020-01-10 | 合肥职业技术学院 | Double-circular-polarization patch array antenna based on broadband balun feed |
| CN111653870B (en) * | 2020-07-06 | 2022-08-16 | 重庆金美通信有限责任公司 | Circularly polarized omnidirectional antenna |
| CN111653870A (en) * | 2020-07-06 | 2020-09-11 | 重庆金美通信有限责任公司 | Circularly polarized omnidirectional antenna |
| CN111710973A (en) * | 2020-07-08 | 2020-09-25 | 哈尔滨众达电子有限公司 | Stacked differential broadband base station antenna |
| CN113690630A (en) * | 2021-07-07 | 2021-11-23 | 华南理工大学 | All-round face covers circular polarization multi-beam antenna based on dielectric polarizer |
| CN113851819A (en) * | 2021-10-15 | 2021-12-28 | 电子科技大学 | Broadband omnidirectional circularly polarized antenna based on curve dipole |
| CN114843751B (en) * | 2022-04-24 | 2024-02-27 | 西安矩阵无线科技有限公司 | Broadband omnidirectional circularly polarized antenna |
| CN114843751A (en) * | 2022-04-24 | 2022-08-02 | 西安矩阵无线科技有限公司 | Broadband omnidirectional circularly polarized antenna |
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Application publication date: 20141008 |