CN104300233A - Ultra-wideband dual-polarized multi-input multi-output antenna - Google Patents
Ultra-wideband dual-polarized multi-input multi-output antenna Download PDFInfo
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- CN104300233A CN104300233A CN201410398263.2A CN201410398263A CN104300233A CN 104300233 A CN104300233 A CN 104300233A CN 201410398263 A CN201410398263 A CN 201410398263A CN 104300233 A CN104300233 A CN 104300233A
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Abstract
The invention discloses an ultra-wideband dual-polarized multi-input multi-output antenna, which comprises a transmission grounding guide plate and a radiation array arranged above the transmission grounding guide plate. The ultra-wideband dual-polarized multi-input multi-output antenna is characterized in that two baluns and two matching circuits used for connecting the baluns and two antenna outputs are arranged between the radiation array and the transmission grounding guide plate, the radiation array comprises four identical flow guide loops, the four flow guide loops are provided with a symmetry axis and connected to the tail end of the radiation array which is of a cross shape and provided with a cross-shaped trench in intersection, and each flow guide loop forms a folded dipole and a group of symmetric lines which come from the center of the radiation array and feed the folded dipole.
Description
Technical field
The present invention relates to dual-band dual-polarized antenna, particularly relate to a kind of ultra-wideband dual polarization mimo antennas.
Background technology
Dual-band dual-polarized antenna for launching or receiving two mutually orthogonal polarization components, as perpendicular polarisation components and horizontal polarized components or two 45 degree of oblique angle polarization components.Modern wireless communication systems needs dual-band dual-polarized antenna to be applied to enter to have more (MIMO) technology more.Multifrequency antenna at least will process two frequency ranges, normally two intermediate-freuqncy signals relatively far apart, and in MIMO application, the frequency of the intermediate-freuqncy signal that frequency is high is at least 1.5 times of the IF signal frequency that frequency is low.
As everyone knows, directed dual-band dual-polarized antenna generally has two dual-polarization radiating units.PCT WO99/59223 and EP 106946 A2 describes the dual-band dual-polarized antenna with paster radiating element, US6054953 describes the dual-band dual-polarized antenna with the paster radiating element excited by groove, the dual-band dual-polarized antenna that US6333720 B1 and US 6831615 B2 describes has the crossed dipoles for the treatment of high band and the dipole square for the treatment of low-frequency range, and the dual-band dual-polarized antenna that US 7283101 B2 describes then has the ring-type radiating element of process high band crossed dipoles and process low-frequency range; It is wide that above-mentioned antenna all has the 3 dB lobes of about 65 degree.US 6930650 B2 and US 7079083 B2 describes has the process crossed dipoles of high frequency and a kind of novel radiation appliance processing low-frequency range, and it is wide that this antenna has the 3dB lobe of 90 degree.
Above-mentioned antenna all has two dual-polarization radiating units, so need to use duplexer to export and radiating element to connect antenna, thus the signal of two frequency ranges is combined into a road output.First duplexer needs the output being connected to first polarization components, and second duplexer needs the output being connected to second polarization components, and therefore known these antenna all comprises many parts, and volume is very large.
Summary of the invention
For the shortcoming of prior art, the object of this invention is to provide the ultra-wideband dual polarization mimo antennas that a kind of structure is simple, volume is little.
To achieve these goals, technical scheme of the present invention is: a kind of ultra-wideband dual polarization mimo antennas, comprise the radiating curtain launched earth plate and be arranged on above described reflecting ground guide plate, two Ba Lun are provided with between described radiating curtain and reflecting ground guide plate, and two for connecting the match circuit that Ba Lun and two antenna exports, described radiating curtain comprises four identical water conservancy diversion loops, described four water conservancy diversion loops have the axis of symmetry and are connected to and have cross shaped head and the end in intersection with the radiating curtain of cruciate groove, each water conservancy diversion loop forms a folded dipole and one group of line of symmetry to described folded dipole feed from described radiating curtain center.
Further, described Ba Lun comprises a long coaxial cable and a short coaxial cable, be connected with a metal dish by external conductor, the bottom of the external conductor of described long coaxial cable is connected with described reflecting ground guide plate, and the bottom of its inner conductor is connected with the strip line of described match circuit; The top of the external conductor of coaxial cable is connected with the end that is connected in the water conservancy diversion loop at described radiating curtain center, and the top being arranged on the inner conductor of the coaxial cable on same symmetry axis is connected by the conductive bridges above radiating curtain.
Further, the plane at described folded dipole place is provided with the four slice straps relative and parallel with folded dipole, between described radiating curtain and reflecting ground guide plate, be provided with four short curved conductors and relative with the end of adjacent folded dipole, between radiating curtain and reflecting ground guide plate, be provided with four length of a film curved conductors and be right against in the middle of described folded dipole.
Further, described match circuit has and is greater than 50 ohm and be less than 50 ohmages and the strip line be together in series.
Further, be provided with a dielectric substrate above described radiating curtain, there is a hole centre of this dielectric substrate.
Further, first conductive bridges on crosspoint is upwards curved, and second conductive bridges is curved downwards.
Further, one end of the short curved conductor of every a slice is arranged on the end face of described dielectric substrate, and the other end points to described reflecting ground guide plate.
Further, described long curved conductor has wide sheet and arrow gauge, and at least in two places by bending.
Further, described long curved conductor is arranged on the top of described reflecting ground guide plate, and is isolated by an insulation mat and reflecting ground guide plate.
Further, the top of described long curved conductor is corresponding with described strap to be arranged, and is isolated by an insulation mat.
Compared with prior art, the present invention replaces duplexer to connect antenna output and radiating curtain by Ba Lun, enormously simplify structure, the volume of antenna is reduced; By arranging strap, short curved conductor and long curved conductor, forming coupled radiation body, there is wider lobe.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Fig. 1 is structural representation of the present invention.
Fig. 2 is the bottom surface structure schematic diagram of radiating curtain.
Fig. 3 is end view in Fig. 1.
Fig. 4 is the vertical view of Fig. 1.
Embodiment
Refer to Fig. 1, the ultra-wideband dual polarization mimo antennas of present embodiment is included in reflecting ground guide plate 3, is arranged on the radiating curtain 1 that reflecting ground guide plate 3 is supported by four insulation mats 2, the bottom surface of the dielectric substrate 6 on reflecting ground guide plate 3 is covered by conductive film, be made up of fillet 4 and wide bar 5 at two strip lines of dielectric substrate 6 end face, two strip lines define two match circuits and 7a, 7b joint of Ba Lun (baluns, balun) and antenna are coupled together.
Refer to Fig. 2, illustrate the situation radiating curtain and Ba Lun upset, the bottom surface of the dielectric substrate 8 on radiating curtain 1 is provided with four identical galvanic circles, each galvanic circle is formed folded dipole 9 and is out connected with the external conductor end end of two long coaxial cable 12a with 12b with two short coaxial cable 11a with 11b by its adjacent end to line of symmetry 10, four pairs of line of symmetries 10 that folded dipole carries out feed from radiating curtain central authorities.Four external conductors of these coaxial cables to be linked together composition two vertical Ba Lun (perpendicular baluns) by a conductive plate 13.The bottom of the external conductor of long coaxial cable 12a and 12b couples together by forming U-shaped conductor 20a and 20b at cross section, and the bottom of external conductor 20a with 20b is connected by the conductive film of the dielectric substrate bottom surface of metal-plated holes with covering one.Four straps 15 are arranged on around radiating curtain, are right against folded dipole at grade, and each conductor 15 has gap to be separated by with the conductor being connected a folded dipole.
As shown in Figure 1 and Figure 4, line of symmetry 10 is excited by conductive bridges 14a and 14b, the inner conductor top of coaxial cable 11a with 12a be connected by conductive bridges 14a, the inner conductor top of coaxial cable 11b with 12b be connected by conductive bridges 14b.The inner conductor bottom of coaxial cable 12a and 12b and the head end of strip line are connected to form match circuit.The other end of these strip lines is then connected with the inner conductor of 7a with the 7b joint of antenna.
Four bending conductors 16 are arranged on around radiating curtain, the adjacent end of folded dipole 9 vis-a-vis.Above folded dipole adjacent end, the top 16a of curved conductor is set up and is fixed on an insulation mat 17.Bottom it, 16b is by lower folding, is separated by the gap of a reflecting ground guide plate.
Four long curved conductors 18 are arranged between radiating curtain and a reflective earth plate 3, conductor 18 is made up of arrow gauge 18a and 18c and wide sheet 18b and 18d, its top 18a is set up and is fixed on an insulation mat 17, face folded dipole 9 and strap 15, wide sheet 18b and arrow gauge 18c to be arranged between radiating curtain and reflective earth plate 3.As shown in Figure 3, wide sheet 18d is arranged on the top of reflecting ground guide plate 3, is separated by an insulation mat 19 and guide plate.The radiating curtain of known antenna only has folded dipole and line of symmetry, and the lobe of its radiation has orthogonally polarized component, 3dB lobe width the chances are 65 degree, can only be operated in a frequency range.Dual-band dual-polarized antenna example of the present invention has extra for increasing lobe width and the conductor providing second working frequency range.
With the strap 15 of folded dipole 9 electromagnetic coupled as guiding body into, guiding radiation along reflective earth plate 3, making the radiation signal in this direction lobe in H-plane wider.
The end of short curved conductor 16 and folded dipole 9 and reflective earth plate 3 capacitive coupling, the end of folded dipole excites short curved conductor top 16a.Therefore, the electric current of radiofrequency signal flows along parts 16b, and produces the radiation of guiding into and launching reflecting ground guide plate 3, and its electric field vector normal is in reflecting ground guide plate.Therefore, from the radiation that short curved conductor 16 produces, the lobe in E-plane becomes wider.
The length of strap 15 and short curved conductor 16 is all less than 0.5 wavelength, corresponding to the intermediate frequency of high band.So these conductors mainly produce high frequency radiation, only the very little low frequency signal of power can be produced.
The length of the long curved conductor 18 be made up of wide sheet 18b and 18d and arrow gauge 18a and 18c is greater than 0.3 wavelength, corresponding to the intermediate frequency of low-frequency range.Arrow gauge 18c is arranged between wide sheet 18b and 18d, to reduce the resonance frequency of long curved conductor 18.Therefore, these radiation of conductors low frequency signals.
Long curved conductor top 18a and 18b and folded dipole 9 capacitive coupling, its underpart 18d and transmitting reflecting ground guide plate 3 electromagnetic coupled.Therefore, long curved conductor forms a radiant body by the water conservancy diversion loop of radiating curtain, is coupled with folded dipole 9 and line of symmetry 10.
The length of the cross conduit of water conservancy diversion loop and radiating curtain is greater than 0.4 wavelength, corresponding to the intermediate frequency of low-frequency range.Short conductors 16 and long curved conductor 18 reduce the resonance frequency in water conservancy diversion loop with being coupled of radiating curtain, so radiating curtain energy radiate low segment signal.Compared with the radiant body only formed by water conservancy diversion loop, the coupled radiation body formed by water conservancy diversion loop and long curved conductor 18, has wider low frequency bandwidth.
The strip line be made up of arrow gauge 4 and wide sheet 5 forms match circuit, and the impedance of arrow gauge 4 is greater than 50 ohm.The impedance of wide sheet 5 is less than 50 ohm.Reflection from wide sheet and arrow gauge is series connected, and compensates the reflection from radiating curtain, improves the voltage standing wave ratio (VSWR) of antenna.
Devise one according to the present invention be operated in the dual-band dual-polarized antenna example of 698 ~ 960MHz and 1710 ~ 2690MHz frequency range and can expand to 618-960MHz and 1710-2690MHz frequency range.This example sample has a diameter to be the reflective earth plate of 250m, the radiating curtain height 58mm above reflecting ground guide plate.The voltage standing wave ratio (VSWR) of this example sample is better than 1.7.Isolation (isolation) is all better than 25dB in two frequency ranges.The half power lobe width of this antenna example when low frequency about 120 ~ 180 degree, when high frequency about 100 ~ 160 degree.This antenna example has so wide lobe, and the radio-frequency (RF) energy that energy radiation is enough in a plane of reflective earth plate, therefore can be used as directed omnidirectional antenna.
In sum, the invention provides a kind of dual-band dual-polarized antenna, it is compared with known antenna, has wider lobe, more simple designs and more small size.
Although the present invention discloses as above with preferred embodiment, and is not used to limit scope of the invention process.The ordinary person of any this area, not departing from scope of invention, does some improvement, and namely every equal improvement done according to the present invention, should be scope of the present invention and contained.
Claims (10)
1. a ultra-wideband dual polarization mimo antennas, comprise the radiating curtain launched earth plate and be arranged on above described reflecting ground guide plate, it is characterized in that, two Ba Lun are provided with between described radiating curtain and reflecting ground guide plate, and two for connecting the match circuit that Ba Lun and two antenna exports, described radiating curtain comprises four identical water conservancy diversion loops, described four water conservancy diversion loops have the axis of symmetry and are connected to and have cross shaped head and the end in intersection with the radiating curtain of cruciate groove, each water conservancy diversion loop forms a folded dipole and one group of line of symmetry to described folded dipole feed from described radiating curtain center.
2. ultra-wideband dual polarization mimo antennas according to claim 1, it is characterized in that, described Ba Lun comprises a long coaxial cable and a short coaxial cable, be connected with a metal dish by external conductor, the bottom of the external conductor of described long coaxial cable is connected with described reflecting ground guide plate, and the bottom of its inner conductor is connected with the strip line of described match circuit; The top of the external conductor of coaxial cable is connected with the end that is connected in the water conservancy diversion loop at described radiating curtain center, and the top being arranged on the inner conductor of the coaxial cable on same symmetry axis is connected by the conductive bridges above radiating curtain.
3. ultra-wideband dual polarization mimo antennas according to claim 1, it is characterized in that, the plane at described folded dipole place is provided with the four slice straps relative and parallel with folded dipole, between described radiating curtain and reflecting ground guide plate, be provided with four short curved conductors and relative with the end of adjacent folded dipole, between radiating curtain and reflecting ground guide plate, be provided with four length of a film curved conductors and be right against in the middle of described folded dipole.
4. ultra-wideband dual polarization mimo antennas according to claim 1, is characterized in that, described match circuit has and is greater than 50 ohm and be less than 50 ohmages and the strip line be together in series.
5. ultra-wideband dual polarization mimo antennas according to claim 1, is characterized in that, be provided with a dielectric substrate above described radiating curtain, and there is a hole centre of this dielectric substrate.
6. ultra-wideband dual polarization mimo antennas according to claim 2, is characterized in that, first conductive bridges on crosspoint is upwards curved, and second conductive bridges is curved downwards.
7. ultra-wideband dual polarization mimo antennas according to claim 5, is characterized in that, one end of the short curved conductor of every a slice is arranged on the end face of described dielectric substrate, and the other end points to described reflecting ground guide plate.
8. ultra-wideband dual polarization mimo antennas according to claim 3, is characterized in that, described long curved conductor has wide sheet and arrow gauge, and at least in two places by bending.
9. ultra-wideband dual polarization mimo antennas according to claim 3, is characterized in that, described long curved conductor is arranged on the top of described reflecting ground guide plate, and is isolated by an insulation mat and reflecting ground guide plate.
10. ultra-wideband dual polarization mimo antennas according to claim 3, is characterized in that, the top of described long curved conductor is corresponding with described strap to be arranged, and is isolated by an insulation mat.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410398263.2A CN104300233B (en) | 2014-08-13 | 2014-08-13 | Ultra-wideband dual-polarized multi-input multi-output antenna |
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| CN201410398263.2A CN104300233B (en) | 2014-08-13 | 2014-08-13 | Ultra-wideband dual-polarized multi-input multi-output antenna |
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| CN104300233A true CN104300233A (en) | 2015-01-21 |
| CN104300233B CN104300233B (en) | 2017-04-26 |
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Cited By (5)
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| CN104577323A (en) * | 2015-02-06 | 2015-04-29 | 西安电子科技大学 | Dual-frequency and dual-polarization antenna used for mobile communication base station |
| CN110622351A (en) * | 2017-05-04 | 2019-12-27 | 华为技术有限公司 | Dual polarized radiating element and antenna |
| US11342688B2 (en) | 2017-09-12 | 2022-05-24 | Huawei Technologies Co., Ltd. | Dual-polarized radiating element and antenna |
| CN114639949A (en) * | 2022-04-27 | 2022-06-17 | 上海海积信息科技股份有限公司 | Circularly polarized antenna |
| CN116864958A (en) * | 2023-05-30 | 2023-10-10 | 中煤科工集团武汉设计研究院有限公司 | Colliery is radio wave omnidirectional receiving antenna in pit |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104577323A (en) * | 2015-02-06 | 2015-04-29 | 西安电子科技大学 | Dual-frequency and dual-polarization antenna used for mobile communication base station |
| CN110622351A (en) * | 2017-05-04 | 2019-12-27 | 华为技术有限公司 | Dual polarized radiating element and antenna |
| US11205859B2 (en) | 2017-05-04 | 2021-12-21 | Huawei Technologies Co., Ltd. | Dual-polarized radiating element and antenna |
| US11342688B2 (en) | 2017-09-12 | 2022-05-24 | Huawei Technologies Co., Ltd. | Dual-polarized radiating element and antenna |
| CN114639949A (en) * | 2022-04-27 | 2022-06-17 | 上海海积信息科技股份有限公司 | Circularly polarized antenna |
| CN114639949B (en) * | 2022-04-27 | 2024-01-05 | 上海海积信息科技股份有限公司 | Circularly polarized antenna |
| CN116864958A (en) * | 2023-05-30 | 2023-10-10 | 中煤科工集团武汉设计研究院有限公司 | Colliery is radio wave omnidirectional receiving antenna in pit |
| CN116864958B (en) * | 2023-05-30 | 2024-04-02 | 中煤科工集团武汉设计研究院有限公司 | Colliery is radio wave omnidirectional receiving antenna in pit |
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| CN104300233B (en) | 2017-04-26 |
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