CN103474765A - Circular polarization crossed dipole antenna and manufacturing method thereof - Google Patents
Circular polarization crossed dipole antenna and manufacturing method thereof Download PDFInfo
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- CN103474765A CN103474765A CN2013104205970A CN201310420597A CN103474765A CN 103474765 A CN103474765 A CN 103474765A CN 2013104205970 A CN2013104205970 A CN 2013104205970A CN 201310420597 A CN201310420597 A CN 201310420597A CN 103474765 A CN103474765 A CN 103474765A
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Abstract
The invention discloses a circular polarization crossed dipole antenna and a manufacturing method of the circular polarization crossed dipole antenna. The circular polarization crossed dipole antenna comprises a metal reflection board, a medium substrate located above the metal reflection board, crossed dipole radiation units arranged on the upper surface and the lower surface of the medium substrate respectively, and a coaxial feed unit connected with the crossed dipole radiation units. The crossed dipole radiation units comprise an upper dipole and a lower dipole which are arranged on the upper surface and the lower surface of the medium substrate respectively. The coaxial feed unit comprises an inner conductor and an outer conductor. The inner conductor penetrates through the metal reflection board and the medium substrate to be connected with the upper dipole. The outer conductor penetrates through the metal reflection board to be connected with the lower dipole. The crossed dipole antenna is led to a micro-strip patch, so that the circular polarization crossed dipole antenna not only has the advantages that a micro-strip antenna is small in size, light in weight, conformal with an application platform easily and easy to integrate, but also has the advantages of the wide impedance bandwidth, the circular polarization bandwidth, high gains and low manufacturing cost.
Description
Technical field
The present invention relates to the microwave antenna technical field, relate in particular to a kind of circular polarization cross dipole antenna and preparation method thereof.
Background technology
The develop rapidly of wireless technology, driving antenna technology is also greatly developed, particularly the every field of circular polarized antenna in radio communication is widely used, for example satellite communication, radio frequency sets (RFID), wireless lan (wlan), global positioning system (GPS), and the Big Dipper navigation system of China's independent research, all used circular polarized antenna.Apply more extensive, just higher to the requirement of antenna performance, in a lot of application, all require antenna impedance bandwidth and circular polarization bandwidth (axial ratio bandwidth) all very wide.The method of broadening circular polarized antenna bandwidth has a lot, additional resonance branch for example, loaded medium resonator, use multi-layer microstrip antenna, add the power splitter in broadband and do feeding network etc., but these methods have its shortcoming, complex structure, otherwise size is very large, otherwise gain is very low.For example, though multilayer micro-strip paster antenna Bandwidth to a certain extent, complex structure and manufacturing cost increase; The power splitter in additional resonance device and loaded medium resonator and interpolation broadband is done the complexity that feeding network has all increased Antenna Design, is unfavorable for producing in enormous quantities.
Therefore, prior art has yet to be improved and developed.
Summary of the invention
In view of above-mentioned the deficiencies in the prior art, the object of the present invention is to provide a kind of circular polarization cross dipole antenna and preparation method thereof, be intended to solve the technical sophistication of current broadening circular polarized antenna bandwidth, increase cost, the problem such as low gains.
Technical scheme of the present invention is as follows:
A kind of circular polarization cross dipole antenna, wherein, described antenna comprises the metallic reflection plate, be arranged on the medium substrate of described metallic reflection plate top, be arranged on the crossed dipoles radiating element of described medium substrate upper and lower surface, the coaxial feed unit be connected with described crossed dipoles radiating element, described crossed dipoles radiating element comprises upper dipole and the lower dipole that is separately positioned on described medium substrate upper and lower surface, described coaxial feed unit comprises inner wire and outer conductor, described inner wire is connected with described upper dipole with medium substrate through described metallic reflection plate, described outer conductor is connected with described lower dipole through described metallic reflection plate.
Described circular polarization cross dipole antenna, wherein, the distribution that is centrosymmetric of described upper dipole and lower dipole.
Described circular polarization cross dipole antenna, wherein, described upper dipole is identical with size with the shape of lower dipole.
Described circular polarization cross dipole antenna, wherein, described upper dipole and lower dipole comprise respectively two dipole arm, between described two dipole arm, by annulus, connect, and wherein, between described two dipole arm, have 90 degree phase differences.
Described circular polarization cross dipole antenna, wherein, the dipole arm that described dipole arm is terminal open circuit.
Described circular polarization cross dipole antenna, wherein, described upper dipole is identical with the annular radii of lower dipole, and described annulus is for cutting the annulus of 1/4th girths.
Described circular polarization cross dipole antenna, wherein, all have 90 degree phase differences between arbitrary neighborhood two dipole arm of four dipole arm of described upper and lower dipole.
Described circular polarization cross dipole antenna, wherein, described medium substrate and metallic reflection plate be arranged in parallel up and down and are fixed together by fulcrum pin.
A kind of preparation method of circular polarization cross dipole antenna as above wherein, said method comprising the steps of:
A, prepare medium substrate, and according to the Central Symmetry principle, upper dipole and the lower dipole that shape size is identical is set respectively in described medium substrate upper and lower surface, wherein, described upper dipole is provided with two dipole arm that are connected by annulus with lower dipole, and the radius of regulating described annulus makes respectively to have 90 degree phase differences between two dipole arm of dipole and lower dipole;
B, preparation metallic reflection plate, be arranged the medium substrate and the metallic reflection plate that are provided with upper and lower dipole up and down in parallel and fix by fulcrum pin;
C, on described metallic reflection plate and medium substrate, be drilled with coaxial aperture, inner wire and the outer conductor of described coaxial feed unit are set in described coaxial aperture, wherein, described inner wire is connected with described upper dipole, and described outer conductor is connected with described lower dipole.
A kind of electronic installation, have wireless transmission function, and wherein, described electronic installation comprises the circular polarization cross dipole antenna with as mentioned above prepared by method.
Beneficial effect: the invention provides a kind of circular polarization cross dipole antenna and preparation method thereof, the present invention is incorporated into cross dipole antenna on microband paste, make circular polarization cross dipole antenna of the present invention not only there is the microstrip antenna volume little, characteristics lightweight and easy and that application platform is conformal, easy of integration, also there is very wide impedance bandwidth and circular polarization bandwidth (axial ratio bandwidth), the high characteristics that gain, manufacturing cost also further reduces simultaneously.
The accompanying drawing explanation
The structural representation that Fig. 1 is circular polarization cross dipole antenna of the present invention.
The cross section structure schematic diagram that Fig. 2 is circular polarization cross dipole antenna of the present invention.
Fig. 3 is that in Fig. 2, A refers to regional structure for amplifying schematic diagram.
Fig. 4 is circular polarization cross dipole antenna preparation method flow chart of the present invention.
The return loss emulation experiment datagram that Fig. 5 is circular polarization cross dipole antenna of the present invention.
The axial ratio emulation experiment datagram that Fig. 6 is circular polarization cross dipole antenna of the present invention.
The gain emulation experiment datagram that Fig. 7 is circular polarization cross dipole antenna of the present invention.
Fig. 8 is that circular polarization cross dipole antenna of the present invention is at the Phi=0 of 2.45GHz place
othe left-right-hand circular polarization directional diagram.
Fig. 9 is that circular polarization cross dipole antenna of the present invention is at the Phi=90 of 2.45GHz place
othe left-right-hand circular polarization directional diagram.
Embodiment
The invention provides a kind of circular polarization cross dipole antenna and preparation method thereof, clearer, clear and definite for making purpose of the present invention, technical scheme and effect, below the present invention is described in more detail.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
As Fig. 1, Fig. 2, a kind of circular polarization cross dipole antenna shown in Fig. 3, this antenna applications is in the ISM band radio communication, wherein, described antenna comprises metallic reflection plate 100, be arranged on the medium substrate 200 of described metallic reflection plate 100 tops, be arranged on the crossed dipoles radiating element of described medium substrate 200 upper and lower surfaces, the coaxial feed unit 400 be connected with described crossed dipoles radiating element, described crossed dipoles radiating element comprises upper dipole 310 and the lower dipole 320 of the similar microstrip antenna that is printed on respectively described medium substrate upper and lower surface, described coaxial feed unit 400 comprises inner wire 410 and outer conductor 420, described inner wire 410 is connected with described upper dipole 310 with medium substrate through described metallic reflection plate, described outer conductor 420 is connected 320 through described metallic reflection plate with described lower dipole.
Described upper dipole is identical with size with the shape of lower dipole, the distribution that is centrosymmetric of described upper dipole and lower dipole, descend dipole to be equivalent to dipole around medium substrate central rotation 180 degree, then, to moving down a dielectric substrate thickness, be printed on the lower surface of medium substrate.Described upper dipole and lower dipole comprise respectively two dipole arm, between described two dipole arm, by annulus 330, connect, preferably, described upper dipole is identical with the annular radii of lower dipole, described annulus is for cutting the annulus of 1/4th girths, be that described annulus is the annulus with complete circle 3/4 girth, wherein, there are 90 degree phase differences between described two dipole arm, this 90 degree phase difference is that radius by regulating described annulus is realized during to certain value, when the annulus of correct radial is set, make the girth of annulus equal or be approximately equal to the radius of four of aerial radiation wavelength/for the moment.Annulus has just become the phase delay line of 90 °, thereby make to have between two dipole arm of dipole the phase difference of 90 degree, then produce circular polarization radiation, in addition, regulate the width of described annulus, can change the impedance of antenna, when the annulus of suitable width is set, impedance bandwidth that can the broadening antenna.Upper and lower dipole is all by as above arranging and make between dipole arm to have 90 degree phase differences and broadening impedance bandwidth.By lower dipole, with coaxial outer conductor, be connected and upper dipole is connected with coaxial inner wire, make the opposite current of upper and lower dipole, there is again the setting of 90 degree phase differences between two dipole arm in conjunction with upper and lower dipole, make between arbitrary neighborhood two dipole arm in four dipole arm of described upper and lower dipole and all there are 90 degree phase differences.Like this, with regard to whole antenna, further broadening the circular polarization bandwidth, and, adopt the wide dipole arm of terminal open circuit also to contribute to regulate impedance bandwidth and circular polarization bandwidth.
Described medium substrate 200 be arranged in parallel up and down and is fixed together by the fulcrum pin 500 arranged on four angles with metallic reflection plate 100.
The preparation method of circular polarization cross dipole antenna as shown in Figure 4 wherein, said method comprising the steps of:
S100, prepare medium substrate, and according to the Central Symmetry principle, upper dipole and the lower dipole that shape size is identical is set respectively in described medium substrate upper and lower surface, wherein, described upper dipole is provided with two dipole arm that are connected by annulus with lower dipole, and the radius of regulating described annulus makes respectively to have 90 degree phase differences between two dipole arm of dipole and lower dipole;
S200, preparation metallic reflection plate, be arranged the medium substrate and the metallic reflection plate that are provided with upper and lower dipole up and down in parallel and fix by fulcrum pin;
S300, on described metallic reflection plate and medium substrate, be drilled with coaxial aperture, inner wire and the outer conductor of described coaxial feed unit are set in described coaxial aperture, wherein, described inner wire is connected with described upper dipole, and described outer conductor is connected with described lower dipole.
In actual fabrication process, can, by regulating the size of circular polarization cross dipole antenna each several part, make this antenna can be applied to each frequency range.
A kind of electronic installation, have wireless transmission function, and wherein, described electronic installation comprises that, by the circular polarization cross dipole antenna that as mentioned above prepared by method, described circular polarization cross dipole antenna sends for the reception of wireless signal.
As shown in Fig. 5-9, the centre frequency of described circular polarization cross dipole antenna work is 2.45GHz, and the lateral dimension of antenna is 55mm * 55mm, vertically is highly 29.6mm; Above-mentioned antenna in frequency range 2.02GHz-3.19GHz, be less than-10dB of return loss, impedance bandwidth is 47.7%.Antenna axial ratio is less than 3dB in 2.30GHz-3.15GHz, and circular polarization bandwidth (axial ratio bandwidth) reaches 34.7%; It is 2.30GHz-3.15GHz that antenna meets the frequency band range that be less than-10dB of return loss and axial ratio be less than 3dB simultaneously.Antenna reaches maximum gain 7.05dBi at the 2.35GHz place, and the average gain in the 2.30GHz-3.15GHz scope is 6.4dBi.
The invention provides a kind of circular polarization cross dipole antenna and preparation method thereof, the present invention is incorporated into cross dipole antenna on microband paste, make circular polarization cross dipole antenna of the present invention not only there is the microstrip antenna volume little, characteristics lightweight and easy and that application platform is conformal, easy of integration, also there is very wide impedance bandwidth and circular polarization bandwidth (axial ratio bandwidth), the high characteristics that gain, manufacturing cost also further reduces simultaneously.
In sum, these are only the embodiment that the present invention is selected, be not intended to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a circular polarization cross dipole antenna, it is characterized in that, described antenna comprises the metallic reflection plate, be arranged on the medium substrate of described metallic reflection plate top, be arranged on the crossed dipoles radiating element of described medium substrate upper and lower surface, the coaxial feed unit be connected with described crossed dipoles radiating element, described crossed dipoles radiating element comprises upper dipole and the lower dipole that is separately positioned on described medium substrate upper and lower surface, described coaxial feed unit comprises inner wire and outer conductor, described inner wire is connected with described upper dipole with medium substrate through described metallic reflection plate, described outer conductor is connected with described lower dipole through described metallic reflection plate.
2. circular polarization cross dipole antenna according to claim 1, is characterized in that, the distribution that is centrosymmetric of described upper dipole and lower dipole.
3. circular polarization cross dipole antenna according to claim 1, is characterized in that, described upper dipole is identical with size with the shape of lower dipole.
4. circular polarization cross dipole antenna according to claim 3, it is characterized in that, described upper dipole and lower dipole comprise respectively two dipole arm, between described two dipole arm, by annulus, connect, wherein, there are 90 degree phase differences between described two dipole arm.
5. circular polarization cross dipole antenna according to claim 4, is characterized in that, the dipole arm that described dipole arm is terminal open circuit.
6. circular polarization cross dipole antenna according to claim 4, is characterized in that, described upper dipole is identical with the annular radii of lower dipole, and described annulus is for cutting the annulus of 1/4th girths.
7. according to the described circular polarization cross dipole antenna of claim 2 or 4, it is characterized in that all thering are 90 degree phase differences between arbitrary neighborhood two dipole arm of four dipole arm of described upper and lower dipole.
8. circular polarization cross dipole antenna according to claim 1, is characterized in that, described medium substrate and metallic reflection plate be arranged in parallel up and down and be fixed together by fulcrum pin.
9. the preparation method as the described circular polarization cross dipole antenna of claim 1-8 any one, is characterized in that, said method comprising the steps of:
A, prepare medium substrate, and according to the Central Symmetry principle, upper dipole and the lower dipole that shape size is identical is set respectively in described medium substrate upper and lower surface, wherein, described upper dipole is provided with two dipole arm that are connected by annulus with lower dipole, and the radius of regulating described annulus makes respectively to have 90 degree phase differences between two dipole arm of dipole and lower dipole;
B, preparation metallic reflection plate, be arranged the medium substrate and the metallic reflection plate that are provided with upper and lower dipole up and down in parallel and fix by fulcrum pin;
C, on described metallic reflection plate and medium substrate, be drilled with coaxial aperture, inner wire and the outer conductor of described coaxial feed unit are set in described coaxial aperture, wherein, described inner wire is connected with described upper dipole, and described outer conductor is connected with described lower dipole.
10. an electronic installation, have wireless transmission function, it is characterized in that, described electronic installation comprises the circular polarization cross dipole antenna with as claimed in claim 9 prepared by method.
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| CN105161829A (en) * | 2015-09-29 | 2015-12-16 | 南京邮电大学 | Air circular circularly-polarized antenna |
| CN105186123A (en) * | 2015-08-19 | 2015-12-23 | 南京邮电大学 | Plane circular polarization antenna |
| CN107104274A (en) * | 2017-04-06 | 2017-08-29 | 上海交通大学 | The wide angle array beamses scanning circular polarised array antenna in the broadband of low section |
| CN107275765A (en) * | 2017-05-18 | 2017-10-20 | 广东顺德中山大学卡内基梅隆大学国际联合研究院 | It is a kind of from the broadband circle polarized cross dipole antenna of phase shift |
| CN107425268A (en) * | 2017-06-09 | 2017-12-01 | 上海交通大学 | High-gain dual mode wideband circular polarized antenna |
| CN107895846A (en) * | 2017-10-30 | 2018-04-10 | 华南理工大学 | One kind has wide band circularly-polarized patch antenna |
| CN109378577A (en) * | 2018-08-08 | 2019-02-22 | 西安电子科技大学 | A kind of miniaturization broadband cross dipole antenna |
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| CN105186123A (en) * | 2015-08-19 | 2015-12-23 | 南京邮电大学 | Plane circular polarization antenna |
| CN105186123B (en) * | 2015-08-19 | 2017-09-15 | 南京邮电大学 | A kind of plane circular polarized antenna |
| CN105161829A (en) * | 2015-09-29 | 2015-12-16 | 南京邮电大学 | Air circular circularly-polarized antenna |
| CN107104274A (en) * | 2017-04-06 | 2017-08-29 | 上海交通大学 | The wide angle array beamses scanning circular polarised array antenna in the broadband of low section |
| CN107275765A (en) * | 2017-05-18 | 2017-10-20 | 广东顺德中山大学卡内基梅隆大学国际联合研究院 | It is a kind of from the broadband circle polarized cross dipole antenna of phase shift |
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| CN113169456B (en) * | 2019-02-28 | 2023-06-30 | 半球全球卫星导航系统公司 | Broadband GNSS antenna system |
| CN113169456A (en) * | 2019-02-28 | 2021-07-23 | 半球全球卫星导航系统公司 | Broadband GNSS antenna system |
| CN111029758A (en) * | 2020-01-10 | 2020-04-17 | 国网思极神往位置服务（北京）有限公司 | Satellite navigation terminal antenna of BD B1 frequency band and working method thereof |
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| CN113097723A (en) * | 2021-04-07 | 2021-07-09 | 江苏友穗精机有限公司 | Broadband dual-frequency circularly polarized half-annulus monopole patch antenna |
| CN113823903A (en) * | 2021-04-29 | 2021-12-21 | 王宇琦 | Broadband high-gain circularly polarized antenna based on asymmetric dipole |
| CN114843754A (en) * | 2022-05-20 | 2022-08-02 | 中国电子科技集团公司第五十四研究所 | Low-profile circularly polarized antenna |
| CN114843754B (en) * | 2022-05-20 | 2023-12-29 | 中国电子科技集团公司第五十四研究所 | Low-profile circularly polarized antenna |
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| CN116435779A (en) * | 2023-06-08 | 2023-07-14 | 深圳大学 | Ultra-wideband circularly polarized antenna |
| CN116435779B (en) * | 2023-06-08 | 2023-08-08 | 深圳大学 | Ultra-wideband circularly polarized antenna |
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